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Gavin Howard01055ba2018-11-03 11:00:21 -06001/* vi: set sw=4 ts=4: */
2/*
3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
4 * Copyright (c) 2018 Gavin D. Howard and contributors.
Gavin Howard01055ba2018-11-03 11:00:21 -06005 */
6//config:config BC
7//config: bool "bc (45 kb; 49 kb when combined with dc)"
8//config: default y
9//config: help
10//config: bc is a command-line, arbitrary-precision calculator with a
11//config: Turing-complete language. See the GNU bc manual
12//config: (https://www.gnu.org/software/bc/manual/bc.html) and bc spec
Denys Vlasenko89e785a2018-12-13 16:35:52 +010013//config: (http://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html).
Gavin Howard01055ba2018-11-03 11:00:21 -060014//config:
Denys Vlasenko89e785a2018-12-13 16:35:52 +010015//config: This bc has five differences to the GNU bc:
16//config: 1) The period (.) is a shortcut for "last", as in the BSD bc.
Gavin Howard01055ba2018-11-03 11:00:21 -060017//config: 2) Arrays are copied before being passed as arguments to
18//config: functions. This behavior is required by the bc spec.
19//config: 3) Arrays can be passed to the builtin "length" function to get
Denys Vlasenko89e785a2018-12-13 16:35:52 +010020//config: the number of elements in the array. This prints "1":
21//config: a[0] = 0; length(a[])
Gavin Howard01055ba2018-11-03 11:00:21 -060022//config: 4) The precedence of the boolean "not" operator (!) is equal to
Denys Vlasenko89e785a2018-12-13 16:35:52 +010023//config: that of the unary minus (-) negation operator. This still
Gavin Howard01055ba2018-11-03 11:00:21 -060024//config: allows POSIX-compliant scripts to work while somewhat
25//config: preserving expected behavior (versus C) and making parsing
26//config: easier.
Denys Vlasenko89e785a2018-12-13 16:35:52 +010027//config: 5) "read()" accepts expressions, not only numeric literals.
Gavin Howard01055ba2018-11-03 11:00:21 -060028//config:
29//config: Options:
Gavin Howard01055ba2018-11-03 11:00:21 -060030//config: -i --interactive force interactive mode
Denys Vlasenko89e785a2018-12-13 16:35:52 +010031//config: -q --quiet don't print version and copyright
32//config: -s --standard error if any non-POSIX extensions are used
33//config: -w --warn warn if any non-POSIX extensions are used
Gavin Howard01055ba2018-11-03 11:00:21 -060034//config: -l --mathlib use predefined math routines:
Denys Vlasenko89e785a2018-12-13 16:35:52 +010035//config: s(expr) sine in radians
36//config: c(expr) cosine in radians
37//config: a(expr) arctangent, returning radians
38//config: l(expr) natural log
39//config: e(expr) raises e to the power of expr
40//config: j(n, x) Bessel function of integer order n of x
Gavin Howard01055ba2018-11-03 11:00:21 -060041//config:
42//config:config DC
43//config: bool "dc (38 kb; 49 kb when combined with bc)"
44//config: default y
45//config: help
46//config: dc is a reverse-polish notation command-line calculator which
47//config: supports unlimited precision arithmetic. See the FreeBSD man page
48//config: (https://www.unix.com/man-page/FreeBSD/1/dc/) and GNU dc manual
Denys Vlasenko89e785a2018-12-13 16:35:52 +010049//config: (https://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html).
Gavin Howard01055ba2018-11-03 11:00:21 -060050//config:
51//config: This dc has a few differences from the two above:
Denys Vlasenko89e785a2018-12-13 16:35:52 +010052//config: 1) When printing a byte stream (command "P"), this dc follows what
Gavin Howard01055ba2018-11-03 11:00:21 -060053//config: the FreeBSD dc does.
Denys Vlasenko89e785a2018-12-13 16:35:52 +010054//config: 2) Implements the GNU extensions for divmod ("~") and
Gavin Howard01055ba2018-11-03 11:00:21 -060055//config: modular exponentiation ("|").
Denys Vlasenko89e785a2018-12-13 16:35:52 +010056//config: 3) Implements all FreeBSD extensions, except for "J" and "M".
Gavin Howard01055ba2018-11-03 11:00:21 -060057//config: 4) Like the FreeBSD dc, this dc supports extended registers.
58//config: However, they are implemented differently. When it encounters
59//config: whitespace where a register should be, it skips the whitespace.
60//config: If the character following is not a lowercase letter, an error
61//config: is issued. Otherwise, the register name is parsed by the
62//config: following regex:
Denys Vlasenko89e785a2018-12-13 16:35:52 +010063//config: [a-z][a-z0-9_]*
Gavin Howard01055ba2018-11-03 11:00:21 -060064//config: This generally means that register names will be surrounded by
Denys Vlasenko89e785a2018-12-13 16:35:52 +010065//config: whitespace. Examples:
66//config: l idx s temp L index S temp2 < do_thing
Gavin Howard01055ba2018-11-03 11:00:21 -060067//config: Also note that, like the FreeBSD dc, extended registers are not
68//config: allowed unless the "-x" option is given.
69//config:
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +010070//config:config FEATURE_DC_SMALL
71//config: bool "Minimal dc implementation (4.2 kb), not using bc code base"
72//config: depends on DC && !BC
Denys Vlasenko6e7c65f2018-12-08 19:34:35 +010073//config: default n
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +010074//config:
75//config:config FEATURE_DC_LIBM
76//config: bool "Enable power and exp functions (requires libm)"
77//config: default y
78//config: depends on FEATURE_DC_SMALL
79//config: help
80//config: Enable power and exp functions.
81//config: NOTE: This will require libm to be present for linking.
82//config:
Gavin Howard01055ba2018-11-03 11:00:21 -060083//config:config FEATURE_BC_SIGNALS
Denys Vlasenko89e785a2018-12-13 16:35:52 +010084//config: bool "Interactive mode (+4kb)"
Gavin Howard01055ba2018-11-03 11:00:21 -060085//config: default y
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +010086//config: depends on (BC || DC) && !FEATURE_DC_SMALL
Gavin Howard01055ba2018-11-03 11:00:21 -060087//config: help
Denys Vlasenko89e785a2018-12-13 16:35:52 +010088//config: Enable interactive mode: when started on a tty,
89//config: ^C interrupts execution and returns to command line,
90//config: errors also return to command line instead of exiting,
91//config: line editing with history is available.
92//config:
93//config: With this option off, input can still be taken from tty,
94//config: but all errors are fatal, ^C is fatal,
95//config: tty is treated exactly the same as any other
96//config: standard input (IOW: no line editing).
Gavin Howard01055ba2018-11-03 11:00:21 -060097//config:
98//config:config FEATURE_BC_LONG_OPTIONS
99//config: bool "Enable bc/dc long options"
100//config: default y
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +0100101//config: depends on (BC || DC) && !FEATURE_DC_SMALL
Gavin Howard01055ba2018-11-03 11:00:21 -0600102//config: help
103//config: Enable long options for bc and dc.
104
105//applet:IF_BC(APPLET(bc, BB_DIR_USR_BIN, BB_SUID_DROP))
106//applet:IF_DC(APPLET(dc, BB_DIR_USR_BIN, BB_SUID_DROP))
107
108//kbuild:lib-$(CONFIG_BC) += bc.o
109//kbuild:lib-$(CONFIG_DC) += bc.o
110
Denys Vlasenko9721f6c2018-12-02 20:34:03 +0100111//See www.gnu.org/software/bc/manual/bc.html
Gavin Howard01055ba2018-11-03 11:00:21 -0600112//usage:#define bc_trivial_usage
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100113//usage: "[-sqliw] FILE..."
Gavin Howard01055ba2018-11-03 11:00:21 -0600114//usage:
Denys Vlasenko9721f6c2018-12-02 20:34:03 +0100115//usage:#define bc_full_usage "\n"
116//usage: "\nArbitrary precision calculator"
117//usage: "\n"
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100118///////: "\n -i Interactive" - has no effect for now
119//usage: "\n -q Quiet"
Denys Vlasenko9721f6c2018-12-02 20:34:03 +0100120//usage: "\n -l Load standard math library"
121//usage: "\n -s Be POSIX compatible"
Denys Vlasenko9721f6c2018-12-02 20:34:03 +0100122//usage: "\n -w Warn if extensions are used"
123///////: "\n -v Version"
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100124//usage: "\n"
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100125//usage: "\n$BC_LINE_LENGTH changes output width"
Gavin Howard01055ba2018-11-03 11:00:21 -0600126//usage:
127//usage:#define bc_example_usage
128//usage: "3 + 4.129\n"
129//usage: "1903 - 2893\n"
130//usage: "-129 * 213.28935\n"
131//usage: "12 / -1932\n"
132//usage: "12 % 12\n"
133//usage: "34 ^ 189\n"
134//usage: "scale = 13\n"
135//usage: "ibase = 2\n"
136//usage: "obase = A\n"
137//usage:
138//usage:#define dc_trivial_usage
Denys Vlasenko6e7c65f2018-12-08 19:34:35 +0100139//usage: IF_NOT_FEATURE_DC_SMALL("[-x] ")"[-eSCRIPT]... [-fFILE]... [FILE]..."
Gavin Howard01055ba2018-11-03 11:00:21 -0600140//usage:
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +0100141//usage:#define dc_full_usage "\n"
142//usage: "\nTiny RPN calculator. Operations:"
Denys Vlasenko6e7c65f2018-12-08 19:34:35 +0100143//usage: "\n+, -, *, /, %, ~, ^," IF_NOT_FEATURE_DC_SMALL(" |,")
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100144//usage: "\np - print top of the stack (without popping)"
145//usage: "\nf - print entire stack"
146//usage: "\nk - pop the value and set the precision"
147//usage: "\ni - pop the value and set input radix"
148//usage: "\no - pop the value and set output radix"
149//usage: "\nExamples: dc -e'2 2 + p' -> 4, dc -e'8 8 * 2 2 + / p' -> 16"
Gavin Howard01055ba2018-11-03 11:00:21 -0600150//usage:
151//usage:#define dc_example_usage
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100152//usage: "$ dc -e'2 2 + p'\n"
Gavin Howard01055ba2018-11-03 11:00:21 -0600153//usage: "4\n"
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100154//usage: "$ dc -e'8 8 \\* 2 2 + / p'\n"
Gavin Howard01055ba2018-11-03 11:00:21 -0600155//usage: "16\n"
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100156//usage: "$ dc -e'0 1 & p'\n"
Gavin Howard01055ba2018-11-03 11:00:21 -0600157//usage: "0\n"
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100158//usage: "$ dc -e'0 1 | p'\n"
Gavin Howard01055ba2018-11-03 11:00:21 -0600159//usage: "1\n"
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100160//usage: "$ echo '72 9 / 8 * p' | dc\n"
Gavin Howard01055ba2018-11-03 11:00:21 -0600161//usage: "64\n"
162
163#include "libbb.h"
Denys Vlasenko95f93bd2018-12-06 10:29:12 +0100164#include "common_bufsiz.h"
Gavin Howard01055ba2018-11-03 11:00:21 -0600165
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +0100166#if ENABLE_FEATURE_DC_SMALL
167# include "dc.c"
168#else
169
Denys Vlasenko2ea53a42018-12-14 17:51:17 +0100170#define DEBUG_LEXER 0
Denys Vlasenko99b37622018-12-15 20:06:59 +0100171#define DEBUG_EXEC 0
Denys Vlasenko2ea53a42018-12-14 17:51:17 +0100172
173#if DEBUG_LEXER
Denys Vlasenkod1d29b42018-12-16 16:03:03 +0100174static uint8_t lex_indent;
Denys Vlasenko2ea53a42018-12-14 17:51:17 +0100175#define dbg_lex(...) \
176 do { \
177 fprintf(stderr, "%*s", lex_indent, ""); \
178 bb_error_msg(__VA_ARGS__); \
179 } while (0)
180#define dbg_lex_enter(...) \
181 do { \
182 dbg_lex(__VA_ARGS__); \
183 lex_indent++; \
184 } while (0)
185#define dbg_lex_done(...) \
186 do { \
187 lex_indent--; \
188 dbg_lex(__VA_ARGS__); \
189 } while (0)
Denys Vlasenko0a238142018-12-14 16:48:34 +0100190#else
Denys Vlasenko2ea53a42018-12-14 17:51:17 +0100191# define dbg_lex(...) ((void)0)
192# define dbg_lex_enter(...) ((void)0)
193# define dbg_lex_done(...) ((void)0)
Denys Vlasenko0a238142018-12-14 16:48:34 +0100194#endif
195
Denys Vlasenko99b37622018-12-15 20:06:59 +0100196#if DEBUG_EXEC
197# define dbg_exec(...) bb_error_msg(__VA_ARGS__)
198#else
199# define dbg_exec(...) ((void)0)
200#endif
201
Gavin Howard01055ba2018-11-03 11:00:21 -0600202typedef enum BcStatus {
Denys Vlasenko60cf7472018-12-04 20:05:28 +0100203 BC_STATUS_SUCCESS = 0,
204 BC_STATUS_FAILURE = 1,
Denys Vlasenkob402ff82018-12-11 15:45:15 +0100205 BC_STATUS_PARSE_EMPTY_EXP = 2, // bc_parse_expr_empty_ok() uses this
Gavin Howard01055ba2018-11-03 11:00:21 -0600206} BcStatus;
207
Gavin Howard01055ba2018-11-03 11:00:21 -0600208#define BC_VEC_INVALID_IDX ((size_t) -1)
209#define BC_VEC_START_CAP (1 << 5)
210
Denys Vlasenko5ba55f12018-12-10 15:37:14 +0100211typedef void (*BcVecFree)(void *) FAST_FUNC;
Gavin Howard01055ba2018-11-03 11:00:21 -0600212
213typedef struct BcVec {
214 char *v;
215 size_t len;
216 size_t cap;
217 size_t size;
218 BcVecFree dtor;
219} BcVec;
220
Gavin Howard01055ba2018-11-03 11:00:21 -0600221typedef signed char BcDig;
222
223typedef struct BcNum {
224 BcDig *restrict num;
225 size_t rdx;
226 size_t len;
227 size_t cap;
228 bool neg;
229} BcNum;
230
Denys Vlasenko2fa11b62018-12-06 12:34:39 +0100231#define BC_NUM_MAX_IBASE ((unsigned long) 16)
232// larger value might speed up BIGNUM calculations a bit:
233#define BC_NUM_DEF_SIZE (16)
234#define BC_NUM_PRINT_WIDTH (69)
Gavin Howard01055ba2018-11-03 11:00:21 -0600235
Denys Vlasenko2fa11b62018-12-06 12:34:39 +0100236#define BC_NUM_KARATSUBA_LEN (32)
Gavin Howard01055ba2018-11-03 11:00:21 -0600237
Gavin Howard01055ba2018-11-03 11:00:21 -0600238typedef enum BcInst {
239
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100240#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -0600241 BC_INST_INC_PRE,
242 BC_INST_DEC_PRE,
243 BC_INST_INC_POST,
244 BC_INST_DEC_POST,
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100245#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600246
247 BC_INST_NEG,
248
249 BC_INST_POWER,
250 BC_INST_MULTIPLY,
251 BC_INST_DIVIDE,
252 BC_INST_MODULUS,
253 BC_INST_PLUS,
254 BC_INST_MINUS,
255
256 BC_INST_REL_EQ,
257 BC_INST_REL_LE,
258 BC_INST_REL_GE,
259 BC_INST_REL_NE,
260 BC_INST_REL_LT,
261 BC_INST_REL_GT,
262
263 BC_INST_BOOL_NOT,
264 BC_INST_BOOL_OR,
265 BC_INST_BOOL_AND,
266
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100267#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -0600268 BC_INST_ASSIGN_POWER,
269 BC_INST_ASSIGN_MULTIPLY,
270 BC_INST_ASSIGN_DIVIDE,
271 BC_INST_ASSIGN_MODULUS,
272 BC_INST_ASSIGN_PLUS,
273 BC_INST_ASSIGN_MINUS,
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100274#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600275 BC_INST_ASSIGN,
276
277 BC_INST_NUM,
278 BC_INST_VAR,
279 BC_INST_ARRAY_ELEM,
280 BC_INST_ARRAY,
281
282 BC_INST_SCALE_FUNC,
283 BC_INST_IBASE,
284 BC_INST_SCALE,
285 BC_INST_LAST,
286 BC_INST_LENGTH,
287 BC_INST_READ,
288 BC_INST_OBASE,
289 BC_INST_SQRT,
290
291 BC_INST_PRINT,
292 BC_INST_PRINT_POP,
293 BC_INST_STR,
294 BC_INST_PRINT_STR,
295
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100296#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -0600297 BC_INST_JUMP,
298 BC_INST_JUMP_ZERO,
299
300 BC_INST_CALL,
301
302 BC_INST_RET,
303 BC_INST_RET0,
304
305 BC_INST_HALT,
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100306#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600307
308 BC_INST_POP,
309 BC_INST_POP_EXEC,
310
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100311#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -0600312 BC_INST_MODEXP,
313 BC_INST_DIVMOD,
314
315 BC_INST_EXECUTE,
316 BC_INST_EXEC_COND,
317
318 BC_INST_ASCIIFY,
319 BC_INST_PRINT_STREAM,
320
321 BC_INST_PRINT_STACK,
322 BC_INST_CLEAR_STACK,
323 BC_INST_STACK_LEN,
324 BC_INST_DUPLICATE,
325 BC_INST_SWAP,
326
327 BC_INST_LOAD,
328 BC_INST_PUSH_VAR,
329 BC_INST_PUSH_TO_VAR,
330
331 BC_INST_QUIT,
332 BC_INST_NQUIT,
333
334 BC_INST_INVALID = -1,
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100335#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600336
337} BcInst;
338
339typedef struct BcId {
340 char *name;
341 size_t idx;
342} BcId;
343
344typedef struct BcFunc {
345 BcVec code;
346 BcVec labels;
347 size_t nparams;
348 BcVec autos;
349} BcFunc;
350
351typedef enum BcResultType {
352
353 BC_RESULT_TEMP,
354
355 BC_RESULT_VAR,
356 BC_RESULT_ARRAY_ELEM,
357 BC_RESULT_ARRAY,
358
359 BC_RESULT_STR,
360
361 BC_RESULT_IBASE,
362 BC_RESULT_SCALE,
363 BC_RESULT_LAST,
364
365 // These are between to calculate ibase, obase, and last from instructions.
366 BC_RESULT_CONSTANT,
367 BC_RESULT_ONE,
368
369 BC_RESULT_OBASE,
370
371} BcResultType;
372
373typedef union BcResultData {
374 BcNum n;
375 BcVec v;
376 BcId id;
377} BcResultData;
378
379typedef struct BcResult {
380 BcResultType t;
381 BcResultData d;
382} BcResult;
383
384typedef struct BcInstPtr {
385 size_t func;
386 size_t idx;
387 size_t len;
388} BcInstPtr;
389
Gavin Howard01055ba2018-11-03 11:00:21 -0600390// BC_LEX_NEG is not used in lexing; it is only for parsing.
391typedef enum BcLexType {
Gavin Howard01055ba2018-11-03 11:00:21 -0600392 BC_LEX_EOF,
393 BC_LEX_INVALID,
394
395 BC_LEX_OP_INC,
396 BC_LEX_OP_DEC,
397
398 BC_LEX_NEG,
399
400 BC_LEX_OP_POWER,
401 BC_LEX_OP_MULTIPLY,
402 BC_LEX_OP_DIVIDE,
403 BC_LEX_OP_MODULUS,
404 BC_LEX_OP_PLUS,
405 BC_LEX_OP_MINUS,
406
407 BC_LEX_OP_REL_EQ,
408 BC_LEX_OP_REL_LE,
409 BC_LEX_OP_REL_GE,
410 BC_LEX_OP_REL_NE,
411 BC_LEX_OP_REL_LT,
412 BC_LEX_OP_REL_GT,
413
414 BC_LEX_OP_BOOL_NOT,
415 BC_LEX_OP_BOOL_OR,
416 BC_LEX_OP_BOOL_AND,
417
418 BC_LEX_OP_ASSIGN_POWER,
419 BC_LEX_OP_ASSIGN_MULTIPLY,
420 BC_LEX_OP_ASSIGN_DIVIDE,
421 BC_LEX_OP_ASSIGN_MODULUS,
422 BC_LEX_OP_ASSIGN_PLUS,
423 BC_LEX_OP_ASSIGN_MINUS,
424 BC_LEX_OP_ASSIGN,
425
426 BC_LEX_NLINE,
427 BC_LEX_WHITESPACE,
428
429 BC_LEX_LPAREN,
430 BC_LEX_RPAREN,
431
432 BC_LEX_LBRACKET,
433 BC_LEX_COMMA,
434 BC_LEX_RBRACKET,
435
Denys Vlasenko9dc5d082018-12-16 18:43:51 +0100436 BC_LEX_LBRACE, // '{' is 0x7B, '}' is 0x7D,
Gavin Howard01055ba2018-11-03 11:00:21 -0600437 BC_LEX_SCOLON,
Denys Vlasenko9dc5d082018-12-16 18:43:51 +0100438 BC_LEX_RBRACE, // should be LBRACE+2: code uses (c - '{' + BC_LEX_LBRACE)
Gavin Howard01055ba2018-11-03 11:00:21 -0600439
440 BC_LEX_STR,
441 BC_LEX_NAME,
442 BC_LEX_NUMBER,
443
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100444 BC_LEX_KEY_1st_keyword,
445 BC_LEX_KEY_AUTO = BC_LEX_KEY_1st_keyword,
Gavin Howard01055ba2018-11-03 11:00:21 -0600446 BC_LEX_KEY_BREAK,
447 BC_LEX_KEY_CONTINUE,
448 BC_LEX_KEY_DEFINE,
449 BC_LEX_KEY_ELSE,
450 BC_LEX_KEY_FOR,
451 BC_LEX_KEY_HALT,
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100452 // code uses "type - BC_LEX_KEY_IBASE + BC_INST_IBASE" construct,
453 BC_LEX_KEY_IBASE, // relative order should match for: BC_INST_IBASE
Gavin Howard01055ba2018-11-03 11:00:21 -0600454 BC_LEX_KEY_IF,
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100455 BC_LEX_KEY_LAST, // relative order should match for: BC_INST_LAST
Gavin Howard01055ba2018-11-03 11:00:21 -0600456 BC_LEX_KEY_LENGTH,
457 BC_LEX_KEY_LIMITS,
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100458 BC_LEX_KEY_OBASE, // relative order should match for: BC_INST_OBASE
Gavin Howard01055ba2018-11-03 11:00:21 -0600459 BC_LEX_KEY_PRINT,
460 BC_LEX_KEY_QUIT,
461 BC_LEX_KEY_READ,
462 BC_LEX_KEY_RETURN,
463 BC_LEX_KEY_SCALE,
464 BC_LEX_KEY_SQRT,
465 BC_LEX_KEY_WHILE,
466
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100467#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -0600468 BC_LEX_EQ_NO_REG,
469 BC_LEX_OP_MODEXP,
470 BC_LEX_OP_DIVMOD,
471
472 BC_LEX_COLON,
473 BC_LEX_ELSE,
474 BC_LEX_EXECUTE,
475 BC_LEX_PRINT_STACK,
476 BC_LEX_CLEAR_STACK,
477 BC_LEX_STACK_LEVEL,
478 BC_LEX_DUPLICATE,
479 BC_LEX_SWAP,
480 BC_LEX_POP,
481
482 BC_LEX_ASCIIFY,
483 BC_LEX_PRINT_STREAM,
484
485 BC_LEX_STORE_IBASE,
486 BC_LEX_STORE_SCALE,
487 BC_LEX_LOAD,
488 BC_LEX_LOAD_POP,
489 BC_LEX_STORE_PUSH,
490 BC_LEX_STORE_OBASE,
491 BC_LEX_PRINT_POP,
492 BC_LEX_NQUIT,
493 BC_LEX_SCALE_FACTOR,
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100494#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600495} BcLexType;
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100496// must match order of BC_LEX_KEY_foo etc above
497#if ENABLE_BC
498struct BcLexKeyword {
499 char name8[8];
500};
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100501#define BC_LEX_KW_ENTRY(a, b) \
502 { .name8 = a /*, .posix = b */ }
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100503static const struct BcLexKeyword bc_lex_kws[20] = {
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100504 BC_LEX_KW_ENTRY("auto" , 1), // 0
505 BC_LEX_KW_ENTRY("break" , 1), // 1
506 BC_LEX_KW_ENTRY("continue", 0), // 2 note: this one has no terminating NUL
507 BC_LEX_KW_ENTRY("define" , 1), // 3
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100508 BC_LEX_KW_ENTRY("else" , 0), // 4
509 BC_LEX_KW_ENTRY("for" , 1), // 5
510 BC_LEX_KW_ENTRY("halt" , 0), // 6
511 BC_LEX_KW_ENTRY("ibase" , 1), // 7
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100512 BC_LEX_KW_ENTRY("if" , 1), // 8
513 BC_LEX_KW_ENTRY("last" , 0), // 9
514 BC_LEX_KW_ENTRY("length" , 1), // 10
515 BC_LEX_KW_ENTRY("limits" , 0), // 11
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100516 BC_LEX_KW_ENTRY("obase" , 1), // 12
517 BC_LEX_KW_ENTRY("print" , 0), // 13
518 BC_LEX_KW_ENTRY("quit" , 1), // 14
519 BC_LEX_KW_ENTRY("read" , 0), // 15
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100520 BC_LEX_KW_ENTRY("return" , 1), // 16
521 BC_LEX_KW_ENTRY("scale" , 1), // 17
522 BC_LEX_KW_ENTRY("sqrt" , 1), // 18
523 BC_LEX_KW_ENTRY("while" , 1), // 19
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100524};
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100525#undef BC_LEX_KW_ENTRY
Denys Vlasenko59d4ce92018-12-17 10:42:31 +0100526#define STRING_if (bc_lex_kws[8].name8)
527#define STRING_else (bc_lex_kws[4].name8)
528#define STRING_while (bc_lex_kws[19].name8)
529#define STRING_for (bc_lex_kws[5].name8)
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100530enum {
531 POSIX_KWORD_MASK = 0
Denys Vlasenko82269122018-12-14 16:30:56 +0100532 | (1 << 0) // 0
533 | (1 << 1) // 1
534 | (0 << 2) // 2
535 | (1 << 3) // 3
536 | (0 << 4) // 4
537 | (1 << 5) // 5
538 | (0 << 6) // 6
539 | (1 << 7) // 7
540 | (1 << 8) // 8
541 | (0 << 9) // 9
542 | (1 << 10) // 10
543 | (0 << 11) // 11
544 | (1 << 12) // 12
545 | (0 << 13) // 13
546 | (1 << 14) // 14
547 | (0 << 15) // 15
548 | (1 << 16) // 16
549 | (1 << 17) // 17
550 | (1 << 18) // 18
551 | (1 << 19) // 19
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100552};
Denys Vlasenkod00d2f92018-12-06 12:59:40 +0100553#define bc_lex_kws_POSIX(i) ((1 << (i)) & POSIX_KWORD_MASK)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +0100554
555// This is a bit array that corresponds to token types. An entry is
556// true if the token is valid in an expression, false otherwise.
557// Used to figure out when expr parsing should stop *without error message*
558// - 0 element indicates this condition. 1 means "this token is to be eaten
559// as part of the expression", token can them still be determined to be invalid
560// by later processing.
561enum {
562#define EXBITS(a,b,c,d,e,f,g,h) \
563 ((uint64_t)((a << 0)+(b << 1)+(c << 2)+(d << 3)+(e << 4)+(f << 5)+(g << 6)+(h << 7)))
564 BC_PARSE_EXPRS_BITS = 0
565 + (EXBITS(0,0,1,1,1,1,1,1) << (0*8)) // 0: eof inval ++ -- - ^ * /
566 + (EXBITS(1,1,1,1,1,1,1,1) << (1*8)) // 8: % + - == <= >= != <
567 + (EXBITS(1,1,1,1,1,1,1,1) << (2*8)) // 16: > ! || && ^= *= /= %=
568 + (EXBITS(1,1,1,0,0,1,1,0) << (3*8)) // 24: += -= = NL WS ( ) [
569 + (EXBITS(0,0,0,0,0,0,1,1) << (4*8)) // 32: , ] { ; } STR NAME NUM
570 + (EXBITS(0,0,0,0,0,0,0,1) << (5*8)) // 40: auto break cont define else for halt ibase
571 + (EXBITS(0,1,1,1,1,0,0,1) << (6*8)) // 48: if last len limits obase print quit read - bug, why "limits" is allowed?
572 + (EXBITS(0,1,1,0,0,0,0,0) << (7*8)) // 56: return scale sqrt while
573#undef EXBITS
574};
575static ALWAYS_INLINE long bc_parse_exprs(unsigned i)
576{
577#if ULONG_MAX > 0xffffffff
578 // 64-bit version (will not work correctly for 32-bit longs!)
579 return BC_PARSE_EXPRS_BITS & (1UL << i);
580#else
581 // 32-bit version
582 unsigned long m = (uint32_t)BC_PARSE_EXPRS_BITS;
583 if (i >= 32) {
584 m = (uint32_t)(BC_PARSE_EXPRS_BITS >> 32);
585 i &= 31;
586 }
587 return m & (1UL << i);
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +0100588#endif
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +0100589}
590
591// This is an array of data for operators that correspond to
592// [BC_LEX_OP_INC...BC_LEX_OP_ASSIGN] token types.
593static const uint8_t bc_parse_ops[] = {
594#define OP(p,l) ((int)(l) * 0x10 + (p))
595 OP(0, false), OP( 0, false ), // inc dec
596 OP(1, false), // neg
597 OP(2, false), // pow
598 OP(3, true ), OP( 3, true ), OP( 3, true ), // mul div mod
599 OP(4, true ), OP( 4, true ), // + -
600 OP(6, true ), OP( 6, true ), OP( 6, true ), OP( 6, true ), OP( 6, true ), OP( 6, true ), // == <= >= != < >
601 OP(1, false), // not
602 OP(7, true ), OP( 7, true ), // or and
603 OP(5, false), OP( 5, false ), OP( 5, false ), OP( 5, false ), OP( 5, false ), // ^= *= /= %= +=
604 OP(5, false), OP( 5, false ), // -= =
605#undef OP
606};
607#define bc_parse_op_PREC(i) (bc_parse_ops[i] & 0x0f)
608#define bc_parse_op_LEFT(i) (bc_parse_ops[i] & 0x10)
609#endif // ENABLE_BC
610
611#if ENABLE_DC
612static const //BcInst - should be this type. Using signed narrow type since BC_INST_INVALID is -1
613int8_t
614dc_parse_insts[] = {
615 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
616 BC_INST_INVALID, BC_INST_POWER, BC_INST_MULTIPLY, BC_INST_DIVIDE,
617 BC_INST_MODULUS, BC_INST_PLUS, BC_INST_MINUS,
618 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
619 BC_INST_INVALID, BC_INST_INVALID,
620 BC_INST_BOOL_NOT, BC_INST_INVALID, BC_INST_INVALID,
621 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
622 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
623 BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GT, BC_INST_INVALID,
624 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
625 BC_INST_INVALID, BC_INST_INVALID,
626 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
627 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
628 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_IBASE,
629 BC_INST_INVALID, BC_INST_INVALID, BC_INST_LENGTH, BC_INST_INVALID,
630 BC_INST_OBASE, BC_INST_PRINT, BC_INST_QUIT, BC_INST_INVALID,
631 BC_INST_INVALID, BC_INST_SCALE, BC_INST_SQRT, BC_INST_INVALID,
632 BC_INST_REL_EQ, BC_INST_MODEXP, BC_INST_DIVMOD, BC_INST_INVALID,
633 BC_INST_INVALID, BC_INST_EXECUTE, BC_INST_PRINT_STACK, BC_INST_CLEAR_STACK,
634 BC_INST_STACK_LEN, BC_INST_DUPLICATE, BC_INST_SWAP, BC_INST_POP,
635 BC_INST_ASCIIFY, BC_INST_PRINT_STREAM, BC_INST_INVALID, BC_INST_INVALID,
636 BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
637 BC_INST_PRINT, BC_INST_NQUIT, BC_INST_SCALE_FUNC,
638};
639#endif // ENABLE_DC
640
Gavin Howard01055ba2018-11-03 11:00:21 -0600641
Gavin Howard01055ba2018-11-03 11:00:21 -0600642typedef struct BcLex {
Gavin Howard01055ba2018-11-03 11:00:21 -0600643 const char *buf;
644 size_t i;
645 size_t line;
Gavin Howard01055ba2018-11-03 11:00:21 -0600646 size_t len;
647 bool newline;
Gavin Howard01055ba2018-11-03 11:00:21 -0600648 struct {
649 BcLexType t;
650 BcLexType last;
651 BcVec v;
652 } t;
Gavin Howard01055ba2018-11-03 11:00:21 -0600653} BcLex;
654
Denys Vlasenko0154d782018-12-14 23:32:51 +0100655#define BC_PARSE_STREND ((char) UCHAR_MAX)
Gavin Howard01055ba2018-11-03 11:00:21 -0600656
Denys Vlasenko0154d782018-12-14 23:32:51 +0100657#define BC_PARSE_REL (1 << 0)
658#define BC_PARSE_PRINT (1 << 1)
659#define BC_PARSE_NOCALL (1 << 2)
660#define BC_PARSE_NOREAD (1 << 3)
661#define BC_PARSE_ARRAY (1 << 4)
Gavin Howard01055ba2018-11-03 11:00:21 -0600662
Gavin Howard01055ba2018-11-03 11:00:21 -0600663typedef struct BcParse {
Gavin Howard01055ba2018-11-03 11:00:21 -0600664 BcLex l;
665
Gavin Howard01055ba2018-11-03 11:00:21 -0600666 BcVec exits;
667 BcVec conds;
668
669 BcVec ops;
670
Gavin Howard01055ba2018-11-03 11:00:21 -0600671 BcFunc *func;
672 size_t fidx;
673
Denys Vlasenkoe9519e42018-12-16 17:06:07 +0100674 size_t in_funcdef;
Gavin Howard01055ba2018-11-03 11:00:21 -0600675} BcParse;
676
Gavin Howard01055ba2018-11-03 11:00:21 -0600677typedef struct BcProgram {
678
679 size_t len;
680 size_t scale;
681
Gavin Howard01055ba2018-11-03 11:00:21 -0600682 size_t ib_t;
Gavin Howard01055ba2018-11-03 11:00:21 -0600683 size_t ob_t;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +0100684 BcNum ob;
Gavin Howard01055ba2018-11-03 11:00:21 -0600685
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100686#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -0600687 BcNum strmb;
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100688#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600689
690 BcVec results;
691 BcVec stack;
692
693 BcVec fns;
694 BcVec fn_map;
695
696 BcVec vars;
697 BcVec var_map;
698
699 BcVec arrs;
700 BcVec arr_map;
701
702 BcVec strs;
703 BcVec consts;
704
705 const char *file;
706
707 BcNum last;
708 BcNum zero;
709 BcNum one;
710
711 size_t nchars;
712
Gavin Howard01055ba2018-11-03 11:00:21 -0600713} BcProgram;
714
715#define BC_PROG_STACK(s, n) ((s)->len >= ((size_t) n))
716
717#define BC_PROG_MAIN (0)
718#define BC_PROG_READ (1)
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100719#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -0600720#define BC_PROG_REQ_FUNCS (2)
Denys Vlasenkoef869ec2018-12-02 18:49:16 +0100721#endif
Gavin Howard01055ba2018-11-03 11:00:21 -0600722
723#define BC_PROG_STR(n) (!(n)->num && !(n)->cap)
724#define BC_PROG_NUM(r, n) \
725 ((r)->t != BC_RESULT_ARRAY && (r)->t != BC_RESULT_STR && !BC_PROG_STR(n))
726
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100727#define BC_FLAG_W (1 << 0)
728#define BC_FLAG_V (1 << 1)
729#define BC_FLAG_S (1 << 2)
730#define BC_FLAG_Q (1 << 3)
731#define BC_FLAG_L (1 << 4)
732#define BC_FLAG_I (1 << 5)
733#define DC_FLAG_X (1 << 6)
Gavin Howard01055ba2018-11-03 11:00:21 -0600734
735#define BC_MAX(a, b) ((a) > (b) ? (a) : (b))
736#define BC_MIN(a, b) ((a) < (b) ? (a) : (b))
737
Denys Vlasenko64074a12018-12-07 15:50:14 +0100738#define BC_MAX_OBASE ((unsigned) 999)
739#define BC_MAX_DIM ((unsigned) INT_MAX)
740#define BC_MAX_SCALE ((unsigned) UINT_MAX)
741#define BC_MAX_STRING ((unsigned) UINT_MAX - 1)
742#define BC_MAX_NUM BC_MAX_STRING
743// Unused apart from "limits" message. Just show a "biggish number" there.
744//#define BC_MAX_NAME BC_MAX_STRING
745//#define BC_MAX_EXP ((unsigned long) LONG_MAX)
746//#define BC_MAX_VARS ((unsigned long) SIZE_MAX - 1)
747#define BC_MAX_NAME_STR "999999999"
748#define BC_MAX_EXP_STR "999999999"
749#define BC_MAX_VARS_STR "999999999"
750
751#define BC_MAX_OBASE_STR "999"
752
753#if INT_MAX == 2147483647
754# define BC_MAX_DIM_STR "2147483647"
755#elif INT_MAX == 9223372036854775807
756# define BC_MAX_DIM_STR "9223372036854775807"
757#else
758# error Strange INT_MAX
759#endif
760
761#if UINT_MAX == 4294967295
762# define BC_MAX_SCALE_STR "4294967295"
763# define BC_MAX_STRING_STR "4294967294"
764#elif UINT_MAX == 18446744073709551615
765# define BC_MAX_SCALE_STR "18446744073709551615"
766# define BC_MAX_STRING_STR "18446744073709551614"
767#else
768# error Strange UINT_MAX
769#endif
770#define BC_MAX_NUM_STR BC_MAX_STRING_STR
Gavin Howard01055ba2018-11-03 11:00:21 -0600771
Denys Vlasenko6d9146a2018-12-02 15:48:37 +0100772struct globals {
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100773 IF_FEATURE_BC_SIGNALS(smallint ttyin;)
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +0100774 IF_FEATURE_CLEAN_UP(smallint exiting;)
Denys Vlasenko69171dc2018-12-12 00:29:24 +0100775 smallint in_read;
Gavin Howard01055ba2018-11-03 11:00:21 -0600776
777 BcParse prs;
778 BcProgram prog;
779
Denys Vlasenko5318f812018-12-05 17:48:01 +0100780 // For error messages. Can be set to current parsed line,
781 // or [TODO] to current executing line (can be before last parsed one)
782 unsigned err_line;
783
Gavin Howard01055ba2018-11-03 11:00:21 -0600784 BcVec files;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +0100785 BcVec input_buffer;
786 FILE *input_fp;
Gavin Howard01055ba2018-11-03 11:00:21 -0600787
788 char *env_args;
Denys Vlasenko95f93bd2018-12-06 10:29:12 +0100789
790#if ENABLE_FEATURE_EDITING
791 line_input_t *line_input_state;
792#endif
Denys Vlasenko6d9146a2018-12-02 15:48:37 +0100793} FIX_ALIASING;
794#define G (*ptr_to_globals)
795#define INIT_G() do { \
796 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
797} while (0)
Denys Vlasenkoe873ff92018-12-06 00:29:22 +0100798#define FREE_G() do { \
799 FREE_PTR_TO_GLOBALS(); \
800} while (0)
Denys Vlasenkod70d4a02018-12-04 20:58:40 +0100801#define G_posix (ENABLE_BC && (option_mask32 & BC_FLAG_S))
802#define G_warn (ENABLE_BC && (option_mask32 & BC_FLAG_W))
Denys Vlasenko6d0be102018-12-06 18:41:59 +0100803#define G_exreg (ENABLE_DC && (option_mask32 & DC_FLAG_X))
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100804#if ENABLE_FEATURE_BC_SIGNALS
Denys Vlasenkob9c321d2018-12-07 12:41:42 +0100805# define G_interrupt bb_got_signal
806# define G_ttyin G.ttyin
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100807#else
Denys Vlasenkob9c321d2018-12-07 12:41:42 +0100808# define G_interrupt 0
809# define G_ttyin 0
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100810#endif
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +0100811#if ENABLE_FEATURE_CLEAN_UP
812# define G_exiting G.exiting
813#else
814# define G_exiting 0
815#endif
Denys Vlasenko00d77792018-11-30 23:13:42 +0100816#define IS_BC (ENABLE_BC && (!ENABLE_DC || applet_name[0] == 'b'))
Denys Vlasenko40534bb2018-12-13 16:59:24 +0100817#define IS_DC (ENABLE_DC && (!ENABLE_BC || applet_name[0] != 'b'))
Denys Vlasenko00d77792018-11-30 23:13:42 +0100818
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100819// In configurations where errors abort instead of propagating error
820// return code up the call chain, functions returning BC_STATUS
821// actually don't return anything, they always succeed and return "void".
822// A macro wrapper is provided, which makes this statement work:
823// s = zbc_func(...)
824// and makes it visible to the compiler that s is always zero,
825// allowing compiler to optimize dead code after the statement.
826//
827// To make code more readable, each such function has a "z"
828// ("always returning zero") prefix, i.e. zbc_foo or zdc_foo.
829//
830#if ENABLE_FEATURE_BC_SIGNALS || ENABLE_FEATURE_CLEAN_UP
Denys Vlasenko7f4daa42018-12-11 19:04:44 +0100831# define ERRORS_ARE_FATAL 0
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100832# define ERRORFUNC /*nothing*/
Denys Vlasenkoec603182018-12-17 10:34:02 +0100833# define IF_ERROR_RETURN_POSSIBLE(a) a
834# define BC_STATUS BcStatus
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100835# define RETURN_STATUS(v) return (v)
Denys Vlasenkoec603182018-12-17 10:34:02 +0100836# define COMMA_SUCCESS /*nothing*/
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100837#else
Denys Vlasenko7f4daa42018-12-11 19:04:44 +0100838# define ERRORS_ARE_FATAL 1
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100839# define ERRORFUNC NORETURN
Denys Vlasenkoec603182018-12-17 10:34:02 +0100840# define IF_ERROR_RETURN_POSSIBLE(a) /*nothing*/
841# define BC_STATUS void
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100842# define RETURN_STATUS(v) do { ((void)(v)); return; } while (0)
Denys Vlasenkoec603182018-12-17 10:34:02 +0100843# define COMMA_SUCCESS ,BC_STATUS_SUCCESS
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100844#endif
845
Denys Vlasenko7f4daa42018-12-11 19:04:44 +0100846#define BC_NUM_NEG(n, neg) ((((ssize_t)(n)) ^ -((ssize_t)(neg))) + (neg))
847#define BC_NUM_ONE(n) ((n)->len == 1 && (n)->rdx == 0 && (n)->num[0] == 1)
848#define BC_NUM_INT(n) ((n)->len - (n)->rdx)
849//#define BC_NUM_AREQ(a, b) (BC_MAX((a)->rdx, (b)->rdx) + BC_MAX(BC_NUM_INT(a), BC_NUM_INT(b)) + 1)
850static /*ALWAYS_INLINE*/ size_t BC_NUM_AREQ(BcNum *a, BcNum *b)
851{
852 return BC_MAX(a->rdx, b->rdx) + BC_MAX(BC_NUM_INT(a), BC_NUM_INT(b)) + 1;
853}
854//#define BC_NUM_MREQ(a, b, scale) (BC_NUM_INT(a) + BC_NUM_INT(b) + BC_MAX((scale), (a)->rdx + (b)->rdx) + 1)
855static /*ALWAYS_INLINE*/ size_t BC_NUM_MREQ(BcNum *a, BcNum *b, size_t scale)
856{
857 return BC_NUM_INT(a) + BC_NUM_INT(b) + BC_MAX(scale, a->rdx + b->rdx) + 1;
858}
859
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100860typedef void (*BcNumDigitOp)(size_t, size_t, bool) FAST_FUNC;
861
Denys Vlasenko7f4daa42018-12-11 19:04:44 +0100862typedef BC_STATUS (*BcNumBinaryOp)(BcNum *, BcNum *, BcNum *, size_t) FAST_FUNC;
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100863
Denys Vlasenko7f4daa42018-12-11 19:04:44 +0100864static BC_STATUS zbc_num_binary(BcNum *a, BcNum *b, BcNum *c, size_t scale,
865 BcNumBinaryOp op, size_t req);
866static FAST_FUNC BC_STATUS zbc_num_a(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale);
867static FAST_FUNC BC_STATUS zbc_num_s(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale);
868static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale);
869static FAST_FUNC BC_STATUS zbc_num_m(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale);
870static FAST_FUNC BC_STATUS zbc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale);
871static FAST_FUNC BC_STATUS zbc_num_rem(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale);
872
873static FAST_FUNC BC_STATUS zbc_num_add(BcNum *a, BcNum *b, BcNum *c, size_t scale)
874{
875 BcNumBinaryOp op = (!a->neg == !b->neg) ? zbc_num_a : zbc_num_s;
876 (void) scale;
877 RETURN_STATUS(zbc_num_binary(a, b, c, false, op, BC_NUM_AREQ(a, b)));
878}
879
880static FAST_FUNC BC_STATUS zbc_num_sub(BcNum *a, BcNum *b, BcNum *c, size_t scale)
881{
882 BcNumBinaryOp op = (!a->neg == !b->neg) ? zbc_num_s : zbc_num_a;
883 (void) scale;
884 RETURN_STATUS(zbc_num_binary(a, b, c, true, op, BC_NUM_AREQ(a, b)));
885}
886
887static FAST_FUNC BC_STATUS zbc_num_mul(BcNum *a, BcNum *b, BcNum *c, size_t scale)
888{
889 size_t req = BC_NUM_MREQ(a, b, scale);
890 RETURN_STATUS(zbc_num_binary(a, b, c, scale, zbc_num_m, req));
891}
892
893static FAST_FUNC BC_STATUS zbc_num_div(BcNum *a, BcNum *b, BcNum *c, size_t scale)
894{
895 size_t req = BC_NUM_MREQ(a, b, scale);
896 RETURN_STATUS(zbc_num_binary(a, b, c, scale, zbc_num_d, req));
897}
898
899static FAST_FUNC BC_STATUS zbc_num_mod(BcNum *a, BcNum *b, BcNum *c, size_t scale)
900{
901 size_t req = BC_NUM_MREQ(a, b, scale);
902 RETURN_STATUS(zbc_num_binary(a, b, c, scale, zbc_num_rem, req));
903}
904
905static FAST_FUNC BC_STATUS zbc_num_pow(BcNum *a, BcNum *b, BcNum *c, size_t scale)
906{
907 RETURN_STATUS(zbc_num_binary(a, b, c, scale, zbc_num_p, a->len * b->len + 1));
908}
Denys Vlasenkoc2d15df2018-12-11 17:56:09 +0100909
Denys Vlasenko1aeacef2018-12-11 19:12:13 +0100910static const BcNumBinaryOp zbc_program_ops[] = {
911 zbc_num_pow, zbc_num_mul, zbc_num_div, zbc_num_mod, zbc_num_add, zbc_num_sub,
Gavin Howard01055ba2018-11-03 11:00:21 -0600912};
Denys Vlasenkoec603182018-12-17 10:34:02 +0100913#define zbc_num_add(...) (zbc_num_add(__VA_ARGS__) COMMA_SUCCESS)
914#define zbc_num_sub(...) (zbc_num_sub(__VA_ARGS__) COMMA_SUCCESS)
915#define zbc_num_mul(...) (zbc_num_mul(__VA_ARGS__) COMMA_SUCCESS)
916#define zbc_num_div(...) (zbc_num_div(__VA_ARGS__) COMMA_SUCCESS)
917#define zbc_num_mod(...) (zbc_num_mod(__VA_ARGS__) COMMA_SUCCESS)
918#define zbc_num_pow(...) (zbc_num_pow(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -0600919
Denys Vlasenkod4744ad2018-12-03 14:28:51 +0100920static void fflush_and_check(void)
921{
922 fflush_all();
923 if (ferror(stdout) || ferror(stderr))
924 bb_perror_msg_and_die("output error");
925}
926
Denys Vlasenkoe873ff92018-12-06 00:29:22 +0100927#if ENABLE_FEATURE_CLEAN_UP
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +0100928#define QUIT_OR_RETURN_TO_MAIN \
Denys Vlasenkoe873ff92018-12-06 00:29:22 +0100929do { \
Denys Vlasenko1a6a4822018-12-06 09:20:32 +0100930 IF_FEATURE_BC_SIGNALS(G_ttyin = 0;) /* do not loop in main loop anymore */ \
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +0100931 G_exiting = 1; \
Denys Vlasenkoe873ff92018-12-06 00:29:22 +0100932 return BC_STATUS_FAILURE; \
933} while (0)
934#else
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +0100935#define QUIT_OR_RETURN_TO_MAIN quit()
Denys Vlasenkoe873ff92018-12-06 00:29:22 +0100936#endif
937
Denys Vlasenkocfdc1332018-12-03 14:02:35 +0100938static void quit(void) NORETURN;
939static void quit(void)
940{
Denys Vlasenkod4744ad2018-12-03 14:28:51 +0100941 if (ferror(stdin))
942 bb_perror_msg_and_die("input error");
943 fflush_and_check();
Denys Vlasenkod1d29b42018-12-16 16:03:03 +0100944 dbg_exec("quit(): exiting with exitcode SUCCESS");
Denys Vlasenkod4744ad2018-12-03 14:28:51 +0100945 exit(0);
Denys Vlasenkocfdc1332018-12-03 14:02:35 +0100946}
947
Denys Vlasenko5318f812018-12-05 17:48:01 +0100948static void bc_verror_msg(const char *fmt, va_list p)
949{
Denys Vlasenko82269122018-12-14 16:30:56 +0100950 const char *sv = sv; // for compiler
Denys Vlasenko5318f812018-12-05 17:48:01 +0100951 if (G.prog.file) {
952 sv = applet_name;
953 applet_name = xasprintf("%s: %s:%u", applet_name, G.prog.file, G.err_line);
954 }
955 bb_verror_msg(fmt, p, NULL);
956 if (G.prog.file) {
957 free((char*)applet_name);
958 applet_name = sv;
959 }
960}
961
Denys Vlasenko86e63cd2018-12-10 19:46:53 +0100962static NOINLINE ERRORFUNC int bc_error_fmt(const char *fmt, ...)
Denys Vlasenkoc1c24702018-12-03 16:06:02 +0100963{
964 va_list p;
965
966 va_start(p, fmt);
Denys Vlasenko5318f812018-12-05 17:48:01 +0100967 bc_verror_msg(fmt, p);
Denys Vlasenkoc1c24702018-12-03 16:06:02 +0100968 va_end(p);
Denys Vlasenko0409ad32018-12-05 16:39:22 +0100969
Denys Vlasenkoec603182018-12-17 10:34:02 +0100970 if (ENABLE_FEATURE_CLEAN_UP || G_ttyin)
971 IF_ERROR_RETURN_POSSIBLE(return BC_STATUS_FAILURE);
972 exit(1);
Denys Vlasenkoc1c24702018-12-03 16:06:02 +0100973}
974
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +0100975#if ENABLE_BC
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +0100976static NOINLINE int bc_posix_error_fmt(const char *fmt, ...)
Denys Vlasenko9b70f192018-12-04 20:51:40 +0100977{
978 va_list p;
979
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +0100980 // Are non-POSIX constructs totally ok?
Denys Vlasenkod70d4a02018-12-04 20:58:40 +0100981 if (!(option_mask32 & (BC_FLAG_S|BC_FLAG_W)))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +0100982 return BC_STATUS_SUCCESS; // yes
Denys Vlasenko9b70f192018-12-04 20:51:40 +0100983
984 va_start(p, fmt);
Denys Vlasenko5318f812018-12-05 17:48:01 +0100985 bc_verror_msg(fmt, p);
Denys Vlasenko9b70f192018-12-04 20:51:40 +0100986 va_end(p);
987
988 // Do we treat non-POSIX constructs as errors?
Denys Vlasenkod70d4a02018-12-04 20:58:40 +0100989 if (!(option_mask32 & BC_FLAG_S))
Denys Vlasenko9b70f192018-12-04 20:51:40 +0100990 return BC_STATUS_SUCCESS; // no, it's a warning
Denys Vlasenkoec603182018-12-17 10:34:02 +0100991 if (ENABLE_FEATURE_CLEAN_UP || G_ttyin)
992 return BC_STATUS_FAILURE;
993 exit(1);
Denys Vlasenko9b70f192018-12-04 20:51:40 +0100994}
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +0100995#endif
Denys Vlasenko9b70f192018-12-04 20:51:40 +0100996
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +0100997// We use error functions with "return bc_error(FMT[, PARAMS])" idiom.
998// This idiom begs for tail-call optimization, but for it to work,
Denys Vlasenko95f93bd2018-12-06 10:29:12 +0100999// function must not have caller-cleaned parameters on stack.
1000// Unfortunately, vararg function API does exactly that on most arches.
1001// Thus, use these shims for the cases when we have no vararg PARAMS:
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001002static ERRORFUNC int bc_error(const char *msg)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01001003{
Denys Vlasenkoec603182018-12-17 10:34:02 +01001004 IF_ERROR_RETURN_POSSIBLE(return) bc_error_fmt("%s", msg);
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001005}
1006static ERRORFUNC int bc_error_bad_character(char c)
1007{
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01001008 if (!c)
1009 IF_ERROR_RETURN_POSSIBLE(return) bc_error("NUL character");
Denys Vlasenkoec603182018-12-17 10:34:02 +01001010 IF_ERROR_RETURN_POSSIBLE(return) bc_error_fmt("bad character '%c'", c);
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001011}
1012static ERRORFUNC int bc_error_bad_expression(void)
1013{
Denys Vlasenkoec603182018-12-17 10:34:02 +01001014 IF_ERROR_RETURN_POSSIBLE(return) bc_error("bad expression");
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001015}
1016static ERRORFUNC int bc_error_bad_token(void)
1017{
Denys Vlasenkoec603182018-12-17 10:34:02 +01001018 IF_ERROR_RETURN_POSSIBLE(return) bc_error("bad token");
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001019}
1020static ERRORFUNC int bc_error_stack_has_too_few_elements(void)
1021{
Denys Vlasenkoec603182018-12-17 10:34:02 +01001022 IF_ERROR_RETURN_POSSIBLE(return) bc_error("stack has too few elements");
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001023}
1024static ERRORFUNC int bc_error_variable_is_wrong_type(void)
1025{
Denys Vlasenkoec603182018-12-17 10:34:02 +01001026 IF_ERROR_RETURN_POSSIBLE(return) bc_error("variable is wrong type");
Denys Vlasenko86e63cd2018-12-10 19:46:53 +01001027}
1028static ERRORFUNC int bc_error_nested_read_call(void)
1029{
Denys Vlasenkoec603182018-12-17 10:34:02 +01001030 IF_ERROR_RETURN_POSSIBLE(return) bc_error("read() call inside of a read() call");
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01001031}
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +01001032#if ENABLE_BC
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01001033static int bc_POSIX_requires(const char *msg)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01001034{
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01001035 return bc_posix_error_fmt("POSIX requires %s", msg);
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01001036}
Denys Vlasenko00646792018-12-05 18:12:27 +01001037static int bc_POSIX_does_not_allow(const char *msg)
1038{
1039 return bc_posix_error_fmt("%s%s", "POSIX does not allow ", msg);
1040}
1041static int bc_POSIX_does_not_allow_bool_ops_this_is_bad(const char *msg)
1042{
1043 return bc_posix_error_fmt("%s%s %s", "POSIX does not allow ", "boolean operators; the following is bad:", msg);
1044}
1045static int bc_POSIX_does_not_allow_empty_X_expression_in_for(const char *msg)
1046{
1047 return bc_posix_error_fmt("%san empty %s expression in a for loop", "POSIX does not allow ", msg);
1048}
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +01001049#endif
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01001050
Gavin Howard01055ba2018-11-03 11:00:21 -06001051static void bc_vec_grow(BcVec *v, size_t n)
1052{
1053 size_t cap = v->cap * 2;
1054 while (cap < v->len + n) cap *= 2;
1055 v->v = xrealloc(v->v, v->size * cap);
1056 v->cap = cap;
1057}
1058
1059static void bc_vec_init(BcVec *v, size_t esize, BcVecFree dtor)
1060{
1061 v->size = esize;
1062 v->cap = BC_VEC_START_CAP;
1063 v->len = 0;
1064 v->dtor = dtor;
1065 v->v = xmalloc(esize * BC_VEC_START_CAP);
1066}
1067
Denys Vlasenko7d628012018-12-04 21:46:47 +01001068static void bc_char_vec_init(BcVec *v)
1069{
1070 bc_vec_init(v, sizeof(char), NULL);
1071}
1072
Gavin Howard01055ba2018-11-03 11:00:21 -06001073static void bc_vec_expand(BcVec *v, size_t req)
1074{
1075 if (v->cap < req) {
1076 v->v = xrealloc(v->v, v->size * req);
1077 v->cap = req;
1078 }
1079}
1080
Denys Vlasenkob23ac512018-12-06 13:10:56 +01001081static void bc_vec_pop(BcVec *v)
1082{
1083 v->len--;
1084 if (v->dtor)
1085 v->dtor(v->v + (v->size * v->len));
1086}
Denys Vlasenko2fa11b62018-12-06 12:34:39 +01001087
Gavin Howard01055ba2018-11-03 11:00:21 -06001088static void bc_vec_npop(BcVec *v, size_t n)
1089{
1090 if (!v->dtor)
1091 v->len -= n;
1092 else {
1093 size_t len = v->len - n;
1094 while (v->len > len) v->dtor(v->v + (v->size * --v->len));
1095 }
1096}
1097
Denys Vlasenko7d628012018-12-04 21:46:47 +01001098static void bc_vec_pop_all(BcVec *v)
1099{
1100 bc_vec_npop(v, v->len);
1101}
1102
Gavin Howard01055ba2018-11-03 11:00:21 -06001103static void bc_vec_push(BcVec *v, const void *data)
1104{
1105 if (v->len + 1 > v->cap) bc_vec_grow(v, 1);
1106 memmove(v->v + (v->size * v->len), data, v->size);
1107 v->len += 1;
1108}
1109
1110static void bc_vec_pushByte(BcVec *v, char data)
1111{
1112 bc_vec_push(v, &data);
1113}
1114
Denys Vlasenko08c033c2018-12-05 16:55:08 +01001115static void bc_vec_pushZeroByte(BcVec *v)
1116{
1117 //bc_vec_pushByte(v, '\0');
1118 // better:
1119 bc_vec_push(v, &const_int_0);
1120}
1121
Gavin Howard01055ba2018-11-03 11:00:21 -06001122static void bc_vec_pushAt(BcVec *v, const void *data, size_t idx)
1123{
1124 if (idx == v->len)
1125 bc_vec_push(v, data);
1126 else {
1127
1128 char *ptr;
1129
1130 if (v->len == v->cap) bc_vec_grow(v, 1);
1131
1132 ptr = v->v + v->size * idx;
1133
1134 memmove(ptr + v->size, ptr, v->size * (v->len++ - idx));
1135 memmove(ptr, data, v->size);
1136 }
1137}
1138
1139static void bc_vec_string(BcVec *v, size_t len, const char *str)
1140{
Denys Vlasenko7d628012018-12-04 21:46:47 +01001141 bc_vec_pop_all(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06001142 bc_vec_expand(v, len + 1);
1143 memcpy(v->v, str, len);
1144 v->len = len;
1145
Denys Vlasenko08c033c2018-12-05 16:55:08 +01001146 bc_vec_pushZeroByte(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06001147}
1148
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001149#if ENABLE_FEATURE_BC_SIGNALS && ENABLE_FEATURE_EDITING
Gavin Howard01055ba2018-11-03 11:00:21 -06001150static void bc_vec_concat(BcVec *v, const char *str)
1151{
Denys Vlasenko8b4cf0d2018-12-10 15:12:58 +01001152 size_t len, slen;
Gavin Howard01055ba2018-11-03 11:00:21 -06001153
Denys Vlasenko08c033c2018-12-05 16:55:08 +01001154 if (v->len == 0) bc_vec_pushZeroByte(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06001155
Denys Vlasenko8b4cf0d2018-12-10 15:12:58 +01001156 slen = strlen(str);
1157 len = v->len + slen;
Gavin Howard01055ba2018-11-03 11:00:21 -06001158
Denys Vlasenko8b4cf0d2018-12-10 15:12:58 +01001159 if (v->cap < len) bc_vec_grow(v, slen);
Denys Vlasenko1ff88622018-12-06 12:06:16 +01001160 strcpy(v->v + v->len - 1, str);
Gavin Howard01055ba2018-11-03 11:00:21 -06001161
1162 v->len = len;
1163}
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001164#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06001165
1166static void *bc_vec_item(const BcVec *v, size_t idx)
1167{
1168 return v->v + v->size * idx;
1169}
1170
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01001171static char** bc_program_str(size_t idx)
1172{
1173 return bc_vec_item(&G.prog.strs, idx);
1174}
1175
1176static BcFunc* bc_program_func(size_t idx)
1177{
1178 return bc_vec_item(&G.prog.fns, idx);
1179}
1180
Gavin Howard01055ba2018-11-03 11:00:21 -06001181static void *bc_vec_item_rev(const BcVec *v, size_t idx)
1182{
1183 return v->v + v->size * (v->len - idx - 1);
1184}
1185
Denys Vlasenkob23ac512018-12-06 13:10:56 +01001186static void *bc_vec_top(const BcVec *v)
1187{
1188 return v->v + v->size * (v->len - 1);
1189}
1190
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01001191static FAST_FUNC void bc_vec_free(void *vec)
Gavin Howard01055ba2018-11-03 11:00:21 -06001192{
1193 BcVec *v = (BcVec *) vec;
Denys Vlasenko7d628012018-12-04 21:46:47 +01001194 bc_vec_pop_all(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06001195 free(v->v);
1196}
1197
Denys Vlasenkocca79a02018-12-05 21:15:46 +01001198static int bc_id_cmp(const void *e1, const void *e2)
1199{
1200 return strcmp(((const BcId *) e1)->name, ((const BcId *) e2)->name);
1201}
1202
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01001203static FAST_FUNC void bc_id_free(void *id)
Denys Vlasenkocca79a02018-12-05 21:15:46 +01001204{
1205 free(((BcId *) id)->name);
1206}
1207
Gavin Howard01055ba2018-11-03 11:00:21 -06001208static size_t bc_map_find(const BcVec *v, const void *ptr)
1209{
1210 size_t low = 0, high = v->len;
1211
1212 while (low < high) {
1213
1214 size_t mid = (low + high) / 2;
1215 BcId *id = bc_vec_item(v, mid);
1216 int result = bc_id_cmp(ptr, id);
1217
1218 if (result == 0)
1219 return mid;
1220 else if (result < 0)
1221 high = mid;
1222 else
1223 low = mid + 1;
1224 }
1225
1226 return low;
1227}
1228
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01001229static int bc_map_insert(BcVec *v, const void *ptr, size_t *i)
Gavin Howard01055ba2018-11-03 11:00:21 -06001230{
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01001231 size_t n = *i = bc_map_find(v, ptr);
Gavin Howard01055ba2018-11-03 11:00:21 -06001232
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01001233 if (n == v->len)
Gavin Howard01055ba2018-11-03 11:00:21 -06001234 bc_vec_push(v, ptr);
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01001235 else if (!bc_id_cmp(ptr, bc_vec_item(v, n)))
1236 return 0; // "was not inserted"
Gavin Howard01055ba2018-11-03 11:00:21 -06001237 else
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01001238 bc_vec_pushAt(v, ptr, n);
1239 return 1; // "was inserted"
Gavin Howard01055ba2018-11-03 11:00:21 -06001240}
1241
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +01001242#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -06001243static size_t bc_map_index(const BcVec *v, const void *ptr)
1244{
1245 size_t i = bc_map_find(v, ptr);
1246 if (i >= v->len) return BC_VEC_INVALID_IDX;
1247 return bc_id_cmp(ptr, bc_vec_item(v, i)) ? BC_VEC_INVALID_IDX : i;
1248}
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +01001249#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06001250
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001251static int bad_input_byte(char c)
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001252{
1253 if ((c < ' ' && c != '\t' && c != '\r' && c != '\n') // also allow '\v' '\f'?
1254 || c > 0x7e
1255 ) {
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001256 bc_error_fmt("illegal character 0x%02x", c);
1257 return 1;
1258 }
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001259 return 0;
1260}
1261
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001262// Note: it _appends_ data from fp to vec.
1263static void bc_read_line(BcVec *vec, FILE *fp)
Gavin Howard01055ba2018-11-03 11:00:21 -06001264{
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001265 again:
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001266 fflush_and_check();
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001267
Gavin Howard01055ba2018-11-03 11:00:21 -06001268#if ENABLE_FEATURE_BC_SIGNALS
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001269 if (G_interrupt) { // ^C was pressed
Denys Vlasenkoc1c24702018-12-03 16:06:02 +01001270 intr:
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001271 if (fp != stdin) {
1272 // ^C while running a script (bc SCRIPT): die.
1273 // We do not return to interactive prompt:
1274 // user might be running us from a shell,
1275 // and SCRIPT might be intended to terminate
1276 // (e.g. contain a "halt" stmt).
1277 // ^C dropping user into a bc prompt instead of
1278 // the shell would be unexpected.
1279 xfunc_die();
1280 }
1281 // ^C while interactive input
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001282 G_interrupt = 0;
1283 // GNU bc says "interrupted execution."
1284 // GNU dc says "Interrupt!"
1285 fputs("\ninterrupted execution\n", stderr);
1286 }
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001287
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001288# if ENABLE_FEATURE_EDITING
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001289 if (G_ttyin && fp == stdin) {
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001290 int n, i;
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001291# define line_buf bb_common_bufsiz1
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001292 n = read_line_input(G.line_input_state, "", line_buf, COMMON_BUFSIZE);
1293 if (n <= 0) { // read errors or EOF, or ^D, or ^C
1294 if (n == 0) // ^C
1295 goto intr;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001296 bc_vec_pushZeroByte(vec); // ^D or EOF (or error)
Denys Vlasenkoe755e302018-12-13 22:25:28 +01001297 return;
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001298 }
1299 i = 0;
1300 for (;;) {
1301 char c = line_buf[i++];
1302 if (!c) break;
1303 if (bad_input_byte(c)) goto again;
1304 }
1305 bc_vec_concat(vec, line_buf);
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001306# undef line_buf
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001307 } else
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01001308# endif
Denys Vlasenkoc1c24702018-12-03 16:06:02 +01001309#endif
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001310 {
1311 int c;
1312 bool bad_chars = 0;
1313 size_t len = vec->len;
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001314
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001315 do {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001316#if ENABLE_FEATURE_BC_SIGNALS
1317 if (G_interrupt) {
1318 // ^C was pressed: ignore entire line, get another one
1319 vec->len = len;
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001320 goto intr;
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01001321 }
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001322#endif
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01001323 do c = fgetc(fp); while (c == '\0');
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001324 if (c == EOF) {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001325 if (ferror(fp))
1326 bb_perror_msg_and_die("input error");
1327 // Note: EOF does not append '\n'
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001328 break;
1329 }
1330 bad_chars |= bad_input_byte(c);
1331 bc_vec_pushByte(vec, (char)c);
1332 } while (c != '\n');
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001333
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001334 if (bad_chars) {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01001335 // Bad chars on this line
1336 if (!G.prog.file) { // stdin
1337 // ignore entire line, get another one
1338 vec->len = len;
1339 goto again;
1340 }
1341 bb_perror_msg_and_die("file '%s' is not text", G.prog.file);
Denys Vlasenkoed849352018-12-06 10:26:13 +01001342 }
Denys Vlasenko915c72b2018-12-13 19:28:41 +01001343 bc_vec_pushZeroByte(vec);
1344 }
Gavin Howard01055ba2018-11-03 11:00:21 -06001345}
1346
Gavin Howard01055ba2018-11-03 11:00:21 -06001347static void bc_num_setToZero(BcNum *n, size_t scale)
1348{
1349 n->len = 0;
1350 n->neg = false;
1351 n->rdx = scale;
1352}
1353
1354static void bc_num_zero(BcNum *n)
1355{
1356 bc_num_setToZero(n, 0);
1357}
1358
1359static void bc_num_one(BcNum *n)
1360{
1361 bc_num_setToZero(n, 0);
1362 n->len = 1;
1363 n->num[0] = 1;
1364}
1365
1366static void bc_num_ten(BcNum *n)
1367{
1368 bc_num_setToZero(n, 0);
1369 n->len = 2;
1370 n->num[0] = 0;
1371 n->num[1] = 1;
1372}
1373
Denys Vlasenko3129f702018-12-09 12:04:44 +01001374// Note: this also sets BcNum to zero
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001375static void bc_num_init(BcNum *n, size_t req)
1376{
1377 req = req >= BC_NUM_DEF_SIZE ? req : BC_NUM_DEF_SIZE;
Denys Vlasenko3129f702018-12-09 12:04:44 +01001378 //memset(n, 0, sizeof(BcNum)); - cleared by assignments below
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001379 n->num = xmalloc(req);
1380 n->cap = req;
Denys Vlasenko3129f702018-12-09 12:04:44 +01001381 n->rdx = 0;
1382 n->len = 0;
1383 n->neg = false;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001384}
1385
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01001386static void bc_num_init_DEF_SIZE(BcNum *n)
1387{
1388 bc_num_init(n, BC_NUM_DEF_SIZE);
1389}
1390
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001391static void bc_num_expand(BcNum *n, size_t req)
1392{
1393 req = req >= BC_NUM_DEF_SIZE ? req : BC_NUM_DEF_SIZE;
1394 if (req > n->cap) {
1395 n->num = xrealloc(n->num, req);
1396 n->cap = req;
1397 }
1398}
1399
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01001400static FAST_FUNC void bc_num_free(void *num)
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001401{
1402 free(((BcNum *) num)->num);
1403}
1404
1405static void bc_num_copy(BcNum *d, BcNum *s)
1406{
1407 if (d != s) {
1408 bc_num_expand(d, s->cap);
1409 d->len = s->len;
1410 d->neg = s->neg;
1411 d->rdx = s->rdx;
1412 memcpy(d->num, s->num, sizeof(BcDig) * d->len);
1413 }
1414}
1415
Denys Vlasenko29301232018-12-11 15:29:32 +01001416static BC_STATUS zbc_num_ulong(BcNum *n, unsigned long *result_p)
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001417{
1418 size_t i;
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001419 unsigned long pow, result;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001420
Denys Vlasenko29301232018-12-11 15:29:32 +01001421 if (n->neg) RETURN_STATUS(bc_error("negative number"));
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001422
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001423 for (result = 0, pow = 1, i = n->rdx; i < n->len; ++i) {
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001424
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001425 unsigned long prev = result, powprev = pow;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001426
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001427 result += ((unsigned long) n->num[i]) * pow;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001428 pow *= 10;
1429
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001430 if (result < prev || pow < powprev)
Denys Vlasenko29301232018-12-11 15:29:32 +01001431 RETURN_STATUS(bc_error("overflow"));
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001432 prev = result;
1433 powprev = pow;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001434 }
Denys Vlasenkoffdcebd2018-12-07 15:10:05 +01001435 *result_p = result;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001436
Denys Vlasenko29301232018-12-11 15:29:32 +01001437 RETURN_STATUS(BC_STATUS_SUCCESS);
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001438}
Denys Vlasenkoec603182018-12-17 10:34:02 +01001439#define zbc_num_ulong(...) (zbc_num_ulong(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001440
1441static void bc_num_ulong2num(BcNum *n, unsigned long val)
1442{
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001443 BcDig *ptr;
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001444
1445 bc_num_zero(n);
1446
1447 if (val == 0) return;
1448
Denys Vlasenkob696d9e2018-12-10 12:22:15 +01001449 if (ULONG_MAX == 0xffffffffUL)
1450 bc_num_expand(n, 10); // 10 digits: 4294967295
Denys Vlasenkoc665c182018-12-10 15:15:42 +01001451 if (ULONG_MAX == 0xffffffffffffffffULL)
Denys Vlasenkob696d9e2018-12-10 12:22:15 +01001452 bc_num_expand(n, 20); // 20 digits: 18446744073709551615
Denys Vlasenkoc665c182018-12-10 15:15:42 +01001453 BUILD_BUG_ON(ULONG_MAX > 0xffffffffffffffffULL);
Denys Vlasenkob696d9e2018-12-10 12:22:15 +01001454
1455 ptr = n->num;
1456 for (;;) {
1457 n->len++;
1458 *ptr++ = val % 10;
1459 val /= 10;
1460 if (val == 0) break;
1461 }
Denys Vlasenkob0e37612018-12-05 21:03:16 +01001462}
1463
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01001464static void bc_num_subArrays(BcDig *restrict a, BcDig *restrict b,
Gavin Howard01055ba2018-11-03 11:00:21 -06001465 size_t len)
1466{
1467 size_t i, j;
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01001468 for (i = 0; i < len; ++i) {
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001469 a[i] -= b[i];
1470 for (j = i; a[j] < 0;) {
1471 a[j++] += 10;
1472 a[j] -= 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06001473 }
1474 }
Gavin Howard01055ba2018-11-03 11:00:21 -06001475}
1476
1477static ssize_t bc_num_compare(BcDig *restrict a, BcDig *restrict b, size_t len)
1478{
Denys Vlasenko4113e1f2018-12-18 00:39:24 +01001479 size_t i = len;
1480 for (;;) {
1481 int c;
1482 if (i == 0)
1483 return 0;
1484 i--;
1485 c = a[i] - b[i];
1486 if (c != 0) {
1487 i++;
1488 if (c < 0)
1489 return -i;
1490 return i;
1491 }
1492 }
Gavin Howard01055ba2018-11-03 11:00:21 -06001493}
1494
1495static ssize_t bc_num_cmp(BcNum *a, BcNum *b)
1496{
1497 size_t i, min, a_int, b_int, diff;
1498 BcDig *max_num, *min_num;
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001499 bool a_max, neg;
Gavin Howard01055ba2018-11-03 11:00:21 -06001500 ssize_t cmp;
1501
1502 if (a == b) return 0;
1503 if (a->len == 0) return BC_NUM_NEG(!!b->len, !b->neg);
1504 if (b->len == 0) return BC_NUM_NEG(1, a->neg);
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001505
1506 if (a->neg != b->neg) // signs of a and b differ
1507 // +a,-b = a>b = 1 or -a,+b = a<b = -1
1508 return (int)b->neg - (int)a->neg;
1509 neg = a->neg; // 1 if both negative, 0 if both positive
Gavin Howard01055ba2018-11-03 11:00:21 -06001510
1511 a_int = BC_NUM_INT(a);
1512 b_int = BC_NUM_INT(b);
1513 a_int -= b_int;
Gavin Howard01055ba2018-11-03 11:00:21 -06001514
1515 if (a_int != 0) return (ssize_t) a_int;
1516
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001517 a_max = (a->rdx > b->rdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06001518 if (a_max) {
1519 min = b->rdx;
1520 diff = a->rdx - b->rdx;
1521 max_num = a->num + diff;
1522 min_num = b->num;
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001523 // neg = (a_max == neg); - NOP (maps 1->1 and 0->0)
1524 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06001525 min = a->rdx;
1526 diff = b->rdx - a->rdx;
1527 max_num = b->num + diff;
1528 min_num = a->num;
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001529 neg = !neg; // same as "neg = (a_max == neg)"
Gavin Howard01055ba2018-11-03 11:00:21 -06001530 }
1531
1532 cmp = bc_num_compare(max_num, min_num, b_int + min);
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001533 if (cmp != 0) return BC_NUM_NEG(cmp, neg);
Gavin Howard01055ba2018-11-03 11:00:21 -06001534
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01001535 for (max_num -= diff, i = diff - 1; i < diff; --i) {
Denys Vlasenko251fbb52018-12-12 11:51:32 +01001536 if (max_num[i]) return BC_NUM_NEG(1, neg);
Gavin Howard01055ba2018-11-03 11:00:21 -06001537 }
1538
1539 return 0;
1540}
1541
1542static void bc_num_truncate(BcNum *n, size_t places)
1543{
1544 if (places == 0) return;
1545
1546 n->rdx -= places;
1547
1548 if (n->len != 0) {
1549 n->len -= places;
1550 memmove(n->num, n->num + places, n->len * sizeof(BcDig));
1551 }
1552}
1553
1554static void bc_num_extend(BcNum *n, size_t places)
1555{
1556 size_t len = n->len + places;
1557
1558 if (places != 0) {
1559
1560 if (n->cap < len) bc_num_expand(n, len);
1561
1562 memmove(n->num + places, n->num, sizeof(BcDig) * n->len);
1563 memset(n->num, 0, sizeof(BcDig) * places);
1564
1565 n->len += places;
1566 n->rdx += places;
1567 }
1568}
1569
1570static void bc_num_clean(BcNum *n)
1571{
1572 while (n->len > 0 && n->num[n->len - 1] == 0) --n->len;
1573 if (n->len == 0)
1574 n->neg = false;
1575 else if (n->len < n->rdx)
1576 n->len = n->rdx;
1577}
1578
1579static void bc_num_retireMul(BcNum *n, size_t scale, bool neg1, bool neg2)
1580{
1581 if (n->rdx < scale)
1582 bc_num_extend(n, scale - n->rdx);
1583 else
1584 bc_num_truncate(n, n->rdx - scale);
1585
1586 bc_num_clean(n);
1587 if (n->len != 0) n->neg = !neg1 != !neg2;
1588}
1589
1590static void bc_num_split(BcNum *restrict n, size_t idx, BcNum *restrict a,
1591 BcNum *restrict b)
1592{
1593 if (idx < n->len) {
1594
1595 b->len = n->len - idx;
1596 a->len = idx;
1597 a->rdx = b->rdx = 0;
1598
1599 memcpy(b->num, n->num + idx, b->len * sizeof(BcDig));
1600 memcpy(a->num, n->num, idx * sizeof(BcDig));
1601 }
1602 else {
1603 bc_num_zero(b);
1604 bc_num_copy(a, n);
1605 }
1606
1607 bc_num_clean(a);
1608 bc_num_clean(b);
1609}
1610
Denys Vlasenko29301232018-12-11 15:29:32 +01001611static BC_STATUS zbc_num_shift(BcNum *n, size_t places)
Gavin Howard01055ba2018-11-03 11:00:21 -06001612{
Denys Vlasenko29301232018-12-11 15:29:32 +01001613 if (places == 0 || n->len == 0) RETURN_STATUS(BC_STATUS_SUCCESS);
Denys Vlasenko64074a12018-12-07 15:50:14 +01001614
1615 // This check makes sense only if size_t is (much) larger than BC_MAX_NUM.
1616 if (SIZE_MAX > (BC_MAX_NUM | 0xff)) {
1617 if (places + n->len > BC_MAX_NUM)
Denys Vlasenko29301232018-12-11 15:29:32 +01001618 RETURN_STATUS(bc_error("number too long: must be [1,"BC_MAX_NUM_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01001619 }
Gavin Howard01055ba2018-11-03 11:00:21 -06001620
1621 if (n->rdx >= places)
1622 n->rdx -= places;
1623 else {
1624 bc_num_extend(n, places - n->rdx);
1625 n->rdx = 0;
1626 }
1627
1628 bc_num_clean(n);
1629
Denys Vlasenko29301232018-12-11 15:29:32 +01001630 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001631}
Denys Vlasenkoec603182018-12-17 10:34:02 +01001632#define zbc_num_shift(...) (zbc_num_shift(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06001633
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001634static BC_STATUS zbc_num_inv(BcNum *a, BcNum *b, size_t scale)
Gavin Howard01055ba2018-11-03 11:00:21 -06001635{
1636 BcNum one;
1637 BcDig num[2];
1638
1639 one.cap = 2;
1640 one.num = num;
1641 bc_num_one(&one);
1642
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001643 RETURN_STATUS(zbc_num_div(&one, a, b, scale));
Gavin Howard01055ba2018-11-03 11:00:21 -06001644}
Denys Vlasenkoec603182018-12-17 10:34:02 +01001645#define zbc_num_inv(...) (zbc_num_inv(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06001646
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001647static FAST_FUNC BC_STATUS zbc_num_a(BcNum *a, BcNum *b, BcNum *restrict c, size_t sub)
Gavin Howard01055ba2018-11-03 11:00:21 -06001648{
1649 BcDig *ptr, *ptr_a, *ptr_b, *ptr_c;
1650 size_t i, max, min_rdx, min_int, diff, a_int, b_int;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001651 unsigned carry;
Gavin Howard01055ba2018-11-03 11:00:21 -06001652
1653 // Because this function doesn't need to use scale (per the bc spec),
1654 // I am hijacking it to say whether it's doing an add or a subtract.
1655
1656 if (a->len == 0) {
1657 bc_num_copy(c, b);
1658 if (sub && c->len) c->neg = !c->neg;
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001659 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001660 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001661 if (b->len == 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06001662 bc_num_copy(c, a);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001663 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001664 }
1665
1666 c->neg = a->neg;
1667 c->rdx = BC_MAX(a->rdx, b->rdx);
1668 min_rdx = BC_MIN(a->rdx, b->rdx);
1669 c->len = 0;
1670
1671 if (a->rdx > b->rdx) {
1672 diff = a->rdx - b->rdx;
1673 ptr = a->num;
1674 ptr_a = a->num + diff;
1675 ptr_b = b->num;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001676 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06001677 diff = b->rdx - a->rdx;
1678 ptr = b->num;
1679 ptr_a = a->num;
1680 ptr_b = b->num + diff;
1681 }
1682
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001683 ptr_c = c->num;
1684 for (i = 0; i < diff; ++i, ++c->len)
1685 ptr_c[i] = ptr[i];
Gavin Howard01055ba2018-11-03 11:00:21 -06001686
1687 ptr_c += diff;
1688 a_int = BC_NUM_INT(a);
1689 b_int = BC_NUM_INT(b);
1690
1691 if (a_int > b_int) {
1692 min_int = b_int;
1693 max = a_int;
1694 ptr = ptr_a;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001695 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06001696 min_int = a_int;
1697 max = b_int;
1698 ptr = ptr_b;
1699 }
1700
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001701 carry = 0;
1702 for (i = 0; i < min_rdx + min_int; ++i) {
1703 unsigned in = (unsigned)ptr_a[i] + (unsigned)ptr_b[i] + carry;
Gavin Howard01055ba2018-11-03 11:00:21 -06001704 carry = in / 10;
1705 ptr_c[i] = (BcDig)(in % 10);
1706 }
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001707 for (; i < max + min_rdx; ++i) {
1708 unsigned in = (unsigned)ptr[i] + carry;
Gavin Howard01055ba2018-11-03 11:00:21 -06001709 carry = in / 10;
1710 ptr_c[i] = (BcDig)(in % 10);
1711 }
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001712 c->len += i;
Gavin Howard01055ba2018-11-03 11:00:21 -06001713
1714 if (carry != 0) c->num[c->len++] = (BcDig) carry;
1715
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001716 RETURN_STATUS(BC_STATUS_SUCCESS); // can't make void, see zbc_num_binary()
Gavin Howard01055ba2018-11-03 11:00:21 -06001717}
1718
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001719static FAST_FUNC BC_STATUS zbc_num_s(BcNum *a, BcNum *b, BcNum *restrict c, size_t sub)
Gavin Howard01055ba2018-11-03 11:00:21 -06001720{
Gavin Howard01055ba2018-11-03 11:00:21 -06001721 ssize_t cmp;
1722 BcNum *minuend, *subtrahend;
1723 size_t start;
1724 bool aneg, bneg, neg;
1725
1726 // Because this function doesn't need to use scale (per the bc spec),
1727 // I am hijacking it to say whether it's doing an add or a subtract.
1728
1729 if (a->len == 0) {
1730 bc_num_copy(c, b);
1731 if (sub && c->len) c->neg = !c->neg;
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001732 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001733 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001734 if (b->len == 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06001735 bc_num_copy(c, a);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001736 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001737 }
1738
1739 aneg = a->neg;
1740 bneg = b->neg;
1741 a->neg = b->neg = false;
1742
1743 cmp = bc_num_cmp(a, b);
1744
1745 a->neg = aneg;
1746 b->neg = bneg;
1747
1748 if (cmp == 0) {
1749 bc_num_setToZero(c, BC_MAX(a->rdx, b->rdx));
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001750 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001751 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001752 if (cmp > 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06001753 neg = a->neg;
1754 minuend = a;
1755 subtrahend = b;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001756 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06001757 neg = b->neg;
1758 if (sub) neg = !neg;
1759 minuend = b;
1760 subtrahend = a;
1761 }
1762
1763 bc_num_copy(c, minuend);
1764 c->neg = neg;
1765
1766 if (c->rdx < subtrahend->rdx) {
1767 bc_num_extend(c, subtrahend->rdx - c->rdx);
1768 start = 0;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001769 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06001770 start = c->rdx - subtrahend->rdx;
1771
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01001772 bc_num_subArrays(c->num + start, subtrahend->num, subtrahend->len);
Gavin Howard01055ba2018-11-03 11:00:21 -06001773
1774 bc_num_clean(c);
1775
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001776 RETURN_STATUS(BC_STATUS_SUCCESS); // can't make void, see zbc_num_binary()
Gavin Howard01055ba2018-11-03 11:00:21 -06001777}
1778
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001779static FAST_FUNC BC_STATUS zbc_num_k(BcNum *restrict a, BcNum *restrict b,
Gavin Howard01055ba2018-11-03 11:00:21 -06001780 BcNum *restrict c)
Denys Vlasenkoec603182018-12-17 10:34:02 +01001781#define zbc_num_k(...) (zbc_num_k(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06001782{
1783 BcStatus s;
Denys Vlasenkob692c2f2018-12-05 18:56:14 +01001784 size_t max = BC_MAX(a->len, b->len), max2 = (max + 1) / 2;
Gavin Howard01055ba2018-11-03 11:00:21 -06001785 BcNum l1, h1, l2, h2, m2, m1, z0, z1, z2, temp;
Denys Vlasenkob692c2f2018-12-05 18:56:14 +01001786 bool aone;
Gavin Howard01055ba2018-11-03 11:00:21 -06001787
Gavin Howard01055ba2018-11-03 11:00:21 -06001788 if (a->len == 0 || b->len == 0) {
1789 bc_num_zero(c);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001790 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001791 }
Denys Vlasenkob692c2f2018-12-05 18:56:14 +01001792 aone = BC_NUM_ONE(a);
1793 if (aone || BC_NUM_ONE(b)) {
Gavin Howard01055ba2018-11-03 11:00:21 -06001794 bc_num_copy(c, aone ? b : a);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001795 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001796 }
1797
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001798 if (a->len + b->len < BC_NUM_KARATSUBA_LEN
1799 || a->len < BC_NUM_KARATSUBA_LEN
1800 || b->len < BC_NUM_KARATSUBA_LEN
1801 ) {
Denys Vlasenkob692c2f2018-12-05 18:56:14 +01001802 size_t i, j, len;
Denys Vlasenkob692c2f2018-12-05 18:56:14 +01001803
Gavin Howard01055ba2018-11-03 11:00:21 -06001804 bc_num_expand(c, a->len + b->len + 1);
1805
1806 memset(c->num, 0, sizeof(BcDig) * c->cap);
Denys Vlasenkob692c2f2018-12-05 18:56:14 +01001807 c->len = len = 0;
Gavin Howard01055ba2018-11-03 11:00:21 -06001808
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01001809 for (i = 0; i < b->len; ++i) {
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001810 unsigned carry = 0;
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01001811 for (j = 0; j < a->len; ++j) {
Denys Vlasenkob3cb9012018-12-05 19:05:32 +01001812 unsigned in = c->num[i + j];
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01001813 in += (unsigned)a->num[j] * (unsigned)b->num[i] + carry;
Denys Vlasenkob3cb9012018-12-05 19:05:32 +01001814 // note: compilers prefer _unsigned_ div/const
Gavin Howard01055ba2018-11-03 11:00:21 -06001815 carry = in / 10;
1816 c->num[i + j] = (BcDig)(in % 10);
1817 }
1818
1819 c->num[i + j] += (BcDig) carry;
1820 len = BC_MAX(len, i + j + !!carry);
Denys Vlasenko06fa65b2018-12-05 19:00:58 +01001821
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001822#if ENABLE_FEATURE_BC_SIGNALS
Denys Vlasenko06fa65b2018-12-05 19:00:58 +01001823 // a=2^1000000
1824 // a*a <- without check below, this will not be interruptible
1825 if (G_interrupt) return BC_STATUS_FAILURE;
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001826#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06001827 }
1828
1829 c->len = len;
1830
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001831 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001832 }
1833
1834 bc_num_init(&l1, max);
1835 bc_num_init(&h1, max);
1836 bc_num_init(&l2, max);
1837 bc_num_init(&h2, max);
1838 bc_num_init(&m1, max);
1839 bc_num_init(&m2, max);
1840 bc_num_init(&z0, max);
1841 bc_num_init(&z1, max);
1842 bc_num_init(&z2, max);
1843 bc_num_init(&temp, max + max);
1844
1845 bc_num_split(a, max2, &l1, &h1);
1846 bc_num_split(b, max2, &l2, &h2);
1847
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001848 s = zbc_num_add(&h1, &l1, &m1, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001849 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001850 s = zbc_num_add(&h2, &l2, &m2, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001851 if (s) goto err;
1852
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001853 s = zbc_num_k(&h1, &h2, &z0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001854 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001855 s = zbc_num_k(&m1, &m2, &z1);
Gavin Howard01055ba2018-11-03 11:00:21 -06001856 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001857 s = zbc_num_k(&l1, &l2, &z2);
Gavin Howard01055ba2018-11-03 11:00:21 -06001858 if (s) goto err;
1859
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001860 s = zbc_num_sub(&z1, &z0, &temp, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001861 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001862 s = zbc_num_sub(&temp, &z2, &z1, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001863 if (s) goto err;
1864
Denys Vlasenko29301232018-12-11 15:29:32 +01001865 s = zbc_num_shift(&z0, max2 * 2);
Gavin Howard01055ba2018-11-03 11:00:21 -06001866 if (s) goto err;
Denys Vlasenko29301232018-12-11 15:29:32 +01001867 s = zbc_num_shift(&z1, max2);
Gavin Howard01055ba2018-11-03 11:00:21 -06001868 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001869 s = zbc_num_add(&z0, &z1, &temp, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001870 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001871 s = zbc_num_add(&temp, &z2, c, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06001872
1873err:
1874 bc_num_free(&temp);
1875 bc_num_free(&z2);
1876 bc_num_free(&z1);
1877 bc_num_free(&z0);
1878 bc_num_free(&m2);
1879 bc_num_free(&m1);
1880 bc_num_free(&h2);
1881 bc_num_free(&l2);
1882 bc_num_free(&h1);
1883 bc_num_free(&l1);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001884 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06001885}
1886
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001887static FAST_FUNC BC_STATUS zbc_num_m(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
Gavin Howard01055ba2018-11-03 11:00:21 -06001888{
1889 BcStatus s;
1890 BcNum cpa, cpb;
1891 size_t maxrdx = BC_MAX(a->rdx, b->rdx);
1892
1893 scale = BC_MAX(scale, a->rdx);
1894 scale = BC_MAX(scale, b->rdx);
1895 scale = BC_MIN(a->rdx + b->rdx, scale);
1896 maxrdx = BC_MAX(maxrdx, scale);
1897
1898 bc_num_init(&cpa, a->len);
1899 bc_num_init(&cpb, b->len);
1900
1901 bc_num_copy(&cpa, a);
1902 bc_num_copy(&cpb, b);
1903 cpa.neg = cpb.neg = false;
1904
Denys Vlasenko29301232018-12-11 15:29:32 +01001905 s = zbc_num_shift(&cpa, maxrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06001906 if (s) goto err;
Denys Vlasenko29301232018-12-11 15:29:32 +01001907 s = zbc_num_shift(&cpb, maxrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06001908 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01001909 s = zbc_num_k(&cpa, &cpb, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06001910 if (s) goto err;
1911
1912 maxrdx += scale;
1913 bc_num_expand(c, c->len + maxrdx);
1914
1915 if (c->len < maxrdx) {
1916 memset(c->num + c->len, 0, (c->cap - c->len) * sizeof(BcDig));
1917 c->len += maxrdx;
1918 }
1919
1920 c->rdx = maxrdx;
1921 bc_num_retireMul(c, scale, a->neg, b->neg);
1922
1923err:
1924 bc_num_free(&cpb);
1925 bc_num_free(&cpa);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001926 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06001927}
Denys Vlasenkoec603182018-12-17 10:34:02 +01001928#define zbc_num_m(...) (zbc_num_m(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06001929
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001930static FAST_FUNC BC_STATUS zbc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
Gavin Howard01055ba2018-11-03 11:00:21 -06001931{
Denys Vlasenko5c0c5ab2018-12-18 13:15:55 +01001932 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06001933 size_t len, end, i;
1934 BcNum cp;
Gavin Howard01055ba2018-11-03 11:00:21 -06001935
1936 if (b->len == 0)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001937 RETURN_STATUS(bc_error("divide by zero"));
1938 if (a->len == 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06001939 bc_num_setToZero(c, scale);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001940 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001941 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001942 if (BC_NUM_ONE(b)) {
Gavin Howard01055ba2018-11-03 11:00:21 -06001943 bc_num_copy(c, a);
1944 bc_num_retireMul(c, scale, a->neg, b->neg);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001945 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06001946 }
1947
1948 bc_num_init(&cp, BC_NUM_MREQ(a, b, scale));
1949 bc_num_copy(&cp, a);
1950 len = b->len;
1951
1952 if (len > cp.len) {
1953 bc_num_expand(&cp, len + 2);
1954 bc_num_extend(&cp, len - cp.len);
1955 }
1956
1957 if (b->rdx > cp.rdx) bc_num_extend(&cp, b->rdx - cp.rdx);
1958 cp.rdx -= b->rdx;
1959 if (scale > cp.rdx) bc_num_extend(&cp, scale - cp.rdx);
1960
1961 if (b->rdx == b->len) {
Denys Vlasenko71c82d12018-12-18 12:43:21 +01001962 for (;;) {
1963 if (len == 0) break;
1964 len--;
1965 if (b->num[len] != 0)
1966 break;
1967 }
1968 len++;
Gavin Howard01055ba2018-11-03 11:00:21 -06001969 }
1970
1971 if (cp.cap == cp.len) bc_num_expand(&cp, cp.len + 1);
1972
1973 // We want an extra zero in front to make things simpler.
1974 cp.num[cp.len++] = 0;
1975 end = cp.len - len;
1976
1977 bc_num_expand(c, cp.len);
1978
1979 bc_num_zero(c);
1980 memset(c->num + end, 0, (c->cap - end) * sizeof(BcDig));
1981 c->rdx = cp.rdx;
1982 c->len = cp.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06001983
Denys Vlasenko5c0c5ab2018-12-18 13:15:55 +01001984 s = BC_STATUS_SUCCESS;
1985 for (i = end - 1; i < end; --i) {
1986 BcDig *n, q;
Gavin Howard01055ba2018-11-03 11:00:21 -06001987 n = cp.num + i;
Denys Vlasenko5c0c5ab2018-12-18 13:15:55 +01001988 for (q = 0; n[len] != 0 || bc_num_compare(n, b->num, len) >= 0; ++q)
1989 bc_num_subArrays(n, b->num, len);
Gavin Howard01055ba2018-11-03 11:00:21 -06001990 c->num[i] = q;
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001991#if ENABLE_FEATURE_BC_SIGNALS
Denys Vlasenkof381a882018-12-05 19:21:34 +01001992 // a=2^100000
1993 // scale=40000
1994 // 1/a <- without check below, this will not be interruptible
1995 if (G_interrupt) {
1996 s = BC_STATUS_FAILURE;
1997 break;
1998 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01001999#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06002000 }
2001
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01002002 bc_num_retireMul(c, scale, a->neg, b->neg);
Gavin Howard01055ba2018-11-03 11:00:21 -06002003 bc_num_free(&cp);
2004
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002005 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002006}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002007#define zbc_num_d(...) (zbc_num_d(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002008
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002009static FAST_FUNC BC_STATUS zbc_num_r(BcNum *a, BcNum *b, BcNum *restrict c,
Gavin Howard01055ba2018-11-03 11:00:21 -06002010 BcNum *restrict d, size_t scale, size_t ts)
2011{
2012 BcStatus s;
2013 BcNum temp;
2014 bool neg;
2015
Denys Vlasenko60cf7472018-12-04 20:05:28 +01002016 if (b->len == 0)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002017 RETURN_STATUS(bc_error("divide by zero"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002018
2019 if (a->len == 0) {
2020 bc_num_setToZero(d, ts);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002021 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002022 }
2023
2024 bc_num_init(&temp, d->cap);
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002025 s = zbc_num_d(a, b, c, scale);
Denys Vlasenkof381a882018-12-05 19:21:34 +01002026 if (s) goto err;
Gavin Howard01055ba2018-11-03 11:00:21 -06002027
2028 if (scale != 0) scale = ts;
2029
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002030 s = zbc_num_m(c, b, &temp, scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06002031 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002032 s = zbc_num_sub(a, &temp, d, scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06002033 if (s) goto err;
2034
2035 if (ts > d->rdx && d->len) bc_num_extend(d, ts - d->rdx);
2036
2037 neg = d->neg;
2038 bc_num_retireMul(d, ts, a->neg, b->neg);
2039 d->neg = neg;
2040
2041err:
2042 bc_num_free(&temp);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002043 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002044}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002045#define zbc_num_r(...) (zbc_num_r(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002046
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002047static FAST_FUNC BC_STATUS zbc_num_rem(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
Gavin Howard01055ba2018-11-03 11:00:21 -06002048{
2049 BcStatus s;
2050 BcNum c1;
2051 size_t ts = BC_MAX(scale + b->rdx, a->rdx), len = BC_NUM_MREQ(a, b, ts);
2052
2053 bc_num_init(&c1, len);
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002054 s = zbc_num_r(a, b, &c1, c, scale, ts);
Gavin Howard01055ba2018-11-03 11:00:21 -06002055 bc_num_free(&c1);
2056
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002057 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002058}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002059#define zbc_num_rem(...) (zbc_num_rem(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002060
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002061static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
Gavin Howard01055ba2018-11-03 11:00:21 -06002062{
2063 BcStatus s = BC_STATUS_SUCCESS;
2064 BcNum copy;
2065 unsigned long pow;
2066 size_t i, powrdx, resrdx;
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01002067 bool neg;
Gavin Howard01055ba2018-11-03 11:00:21 -06002068
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002069 if (b->rdx) RETURN_STATUS(bc_error("non integer number"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002070
2071 if (b->len == 0) {
2072 bc_num_one(c);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002073 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002074 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002075 if (a->len == 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002076 bc_num_setToZero(c, scale);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002077 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002078 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002079 if (BC_NUM_ONE(b)) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002080 if (!b->neg)
2081 bc_num_copy(c, a);
2082 else
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002083 s = zbc_num_inv(a, c, scale);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002084 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002085 }
2086
2087 neg = b->neg;
2088 b->neg = false;
2089
Denys Vlasenko29301232018-12-11 15:29:32 +01002090 s = zbc_num_ulong(b, &pow);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002091 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002092
2093 bc_num_init(&copy, a->len);
2094 bc_num_copy(&copy, a);
2095
Denys Vlasenko2d615fe2018-12-07 16:22:45 +01002096 if (!neg) {
2097 if (a->rdx > scale)
2098 scale = a->rdx;
2099 if (a->rdx * pow < scale)
2100 scale = a->rdx * pow;
2101 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002102
2103 b->neg = neg;
2104
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01002105 for (powrdx = a->rdx; !(pow & 1); pow >>= 1) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002106 powrdx <<= 1;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002107 s = zbc_num_mul(&copy, &copy, &copy, powrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06002108 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002109 // Not needed: zbc_num_mul() has a check for ^C:
Denys Vlasenko06fa65b2018-12-05 19:00:58 +01002110 //if (G_interrupt) {
2111 // s = BC_STATUS_FAILURE;
2112 // goto err;
2113 //}
Gavin Howard01055ba2018-11-03 11:00:21 -06002114 }
2115
Gavin Howard01055ba2018-11-03 11:00:21 -06002116 bc_num_copy(c, &copy);
2117
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01002118 for (resrdx = powrdx, pow >>= 1; pow != 0; pow >>= 1) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002119 powrdx <<= 1;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002120 s = zbc_num_mul(&copy, &copy, &copy, powrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06002121 if (s) goto err;
2122
2123 if (pow & 1) {
2124 resrdx += powrdx;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002125 s = zbc_num_mul(c, &copy, c, resrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06002126 if (s) goto err;
2127 }
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002128 // Not needed: zbc_num_mul() has a check for ^C:
Denys Vlasenko06fa65b2018-12-05 19:00:58 +01002129 //if (G_interrupt) {
2130 // s = BC_STATUS_FAILURE;
2131 // goto err;
2132 //}
Gavin Howard01055ba2018-11-03 11:00:21 -06002133 }
2134
2135 if (neg) {
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002136 s = zbc_num_inv(c, c, scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06002137 if (s) goto err;
2138 }
2139
Gavin Howard01055ba2018-11-03 11:00:21 -06002140 if (c->rdx > scale) bc_num_truncate(c, c->rdx - scale);
2141
2142 // We can't use bc_num_clean() here.
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01002143 for (i = 0; i < c->len; ++i)
2144 if (c->num[i] != 0)
2145 goto skip;
2146 bc_num_setToZero(c, scale);
2147 skip:
Gavin Howard01055ba2018-11-03 11:00:21 -06002148
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01002149 err:
Gavin Howard01055ba2018-11-03 11:00:21 -06002150 bc_num_free(&copy);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002151 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002152}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002153#define zbc_num_p(...) (zbc_num_p(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002154
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002155static BC_STATUS zbc_num_binary(BcNum *a, BcNum *b, BcNum *c, size_t scale,
Gavin Howard01055ba2018-11-03 11:00:21 -06002156 BcNumBinaryOp op, size_t req)
2157{
2158 BcStatus s;
2159 BcNum num2, *ptr_a, *ptr_b;
2160 bool init = false;
2161
2162 if (c == a) {
2163 ptr_a = &num2;
2164 memcpy(ptr_a, c, sizeof(BcNum));
2165 init = true;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002166 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06002167 ptr_a = a;
2168
2169 if (c == b) {
2170 ptr_b = &num2;
2171 if (c != a) {
2172 memcpy(ptr_b, c, sizeof(BcNum));
2173 init = true;
2174 }
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002175 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06002176 ptr_b = b;
2177
2178 if (init)
2179 bc_num_init(c, req);
2180 else
2181 bc_num_expand(c, req);
2182
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002183 s = BC_STATUS_SUCCESS;
Denys Vlasenkoec603182018-12-17 10:34:02 +01002184 IF_ERROR_RETURN_POSSIBLE(s =) op(ptr_a, ptr_b, c, scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06002185
2186 if (init) bc_num_free(&num2);
2187
Denys Vlasenko29301232018-12-11 15:29:32 +01002188 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002189}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002190#define zbc_num_binary(...) (zbc_num_binary(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002191
Denys Vlasenko9311e012018-12-10 11:54:18 +01002192static bool bc_num_strValid(const char *val, size_t base)
2193{
2194 BcDig b;
2195 bool radix;
2196
2197 b = (BcDig)(base <= 10 ? base + '0' : base - 10 + 'A');
2198 radix = false;
2199 for (;;) {
2200 BcDig c = *val++;
2201 if (c == '\0')
2202 break;
2203 if (c == '.') {
2204 if (radix) return false;
2205 radix = true;
2206 continue;
2207 }
2208 if (c < '0' || c >= b || (c > '9' && c < 'A'))
2209 return false;
2210 }
2211 return true;
2212}
2213
2214// Note: n is already "bc_num_zero()"ed,
2215// leading zeroes in "val" are removed
2216static void bc_num_parseDecimal(BcNum *n, const char *val)
2217{
2218 size_t len, i;
2219 const char *ptr;
Denys Vlasenko9311e012018-12-10 11:54:18 +01002220
2221 len = strlen(val);
2222 if (len == 0)
2223 return;
2224
Denys Vlasenko9311e012018-12-10 11:54:18 +01002225 bc_num_expand(n, len);
2226
2227 ptr = strchr(val, '.');
2228
2229 n->rdx = 0;
2230 if (ptr != NULL)
2231 n->rdx = (size_t)((val + len) - (ptr + 1));
2232
Denys Vlasenkodafbc2c2018-12-10 15:38:52 +01002233 for (i = 0; val[i]; ++i) {
2234 if (val[i] != '0' && val[i] != '.') {
2235 // Not entirely zero value - convert it, and exit
2236 i = len - 1;
2237 for (;;) {
2238 n->num[n->len] = val[i] - '0';
2239 ++n->len;
Denys Vlasenko9311e012018-12-10 11:54:18 +01002240 skip_dot:
Denys Vlasenko87b49be2018-12-14 16:24:01 +01002241 if (i == 0) break;
2242 if (val[--i] == '.') goto skip_dot;
Denys Vlasenkodafbc2c2018-12-10 15:38:52 +01002243 }
2244 break;
Denys Vlasenko9311e012018-12-10 11:54:18 +01002245 }
2246 }
Denys Vlasenko87b49be2018-12-14 16:24:01 +01002247 // if for() exits without hitting if(), the value is entirely zero
Denys Vlasenko9311e012018-12-10 11:54:18 +01002248}
2249
2250// Note: n is already "bc_num_zero()"ed,
2251// leading zeroes in "val" are removed
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002252static void bc_num_parseBase(BcNum *n, const char *val, unsigned base_t)
Denys Vlasenko9311e012018-12-10 11:54:18 +01002253{
2254 BcStatus s;
2255 BcNum temp, mult, result;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002256 BcNum base;
Denys Vlasenko9311e012018-12-10 11:54:18 +01002257 BcDig c = '\0';
2258 unsigned long v;
2259 size_t i, digits;
2260
2261 for (i = 0; ; ++i) {
2262 if (val[i] == '\0')
2263 return;
2264 if (val[i] != '.' && val[i] != '0')
2265 break;
2266 }
2267
2268 bc_num_init_DEF_SIZE(&temp);
2269 bc_num_init_DEF_SIZE(&mult);
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002270 bc_num_init_DEF_SIZE(&base);
2271 bc_num_ulong2num(&base, base_t);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002272
2273 for (;;) {
2274 c = *val++;
2275 if (c == '\0') goto int_err;
2276 if (c == '.') break;
2277
2278 v = (unsigned long) (c <= '9' ? c - '0' : c - 'A' + 10);
2279
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002280 s = zbc_num_mul(n, &base, &mult, 0);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002281 if (s) goto int_err;
2282 bc_num_ulong2num(&temp, v);
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002283 s = zbc_num_add(&mult, &temp, n, 0);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002284 if (s) goto int_err;
2285 }
2286
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002287 bc_num_init(&result, base.len);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002288 //bc_num_zero(&result); - already is
2289 bc_num_one(&mult);
2290
2291 digits = 0;
2292 for (;;) {
2293 c = *val++;
2294 if (c == '\0') break;
2295 digits++;
2296
2297 v = (unsigned long) (c <= '9' ? c - '0' : c - 'A' + 10);
2298
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002299 s = zbc_num_mul(&result, &base, &result, 0);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002300 if (s) goto err;
2301 bc_num_ulong2num(&temp, v);
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002302 s = zbc_num_add(&result, &temp, &result, 0);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002303 if (s) goto err;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002304 s = zbc_num_mul(&mult, &base, &mult, 0);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002305 if (s) goto err;
2306 }
2307
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002308 s = zbc_num_div(&result, &mult, &result, digits);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002309 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002310 s = zbc_num_add(n, &result, n, digits);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002311 if (s) goto err;
2312
2313 if (n->len != 0) {
2314 if (n->rdx < digits) bc_num_extend(n, digits - n->rdx);
2315 } else
2316 bc_num_zero(n);
2317
2318err:
2319 bc_num_free(&result);
2320int_err:
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002321 bc_num_free(&base);
Denys Vlasenko9311e012018-12-10 11:54:18 +01002322 bc_num_free(&mult);
2323 bc_num_free(&temp);
2324}
2325
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002326static BC_STATUS zbc_num_parse(BcNum *n, const char *val, unsigned base_t)
Gavin Howard01055ba2018-11-03 11:00:21 -06002327{
Denys Vlasenko60cf7472018-12-04 20:05:28 +01002328 if (!bc_num_strValid(val, base_t))
Denys Vlasenko29301232018-12-11 15:29:32 +01002329 RETURN_STATUS(bc_error("bad number string"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002330
Denys Vlasenko4a024c72018-12-09 13:21:54 +01002331 bc_num_zero(n);
2332 while (*val == '0') val++;
2333
Gavin Howard01055ba2018-11-03 11:00:21 -06002334 if (base_t == 10)
2335 bc_num_parseDecimal(n, val);
2336 else
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01002337 bc_num_parseBase(n, val, base_t);
Gavin Howard01055ba2018-11-03 11:00:21 -06002338
Denys Vlasenko29301232018-12-11 15:29:32 +01002339 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002340}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002341#define zbc_num_parse(...) (zbc_num_parse(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002342
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002343static BC_STATUS zbc_num_sqrt(BcNum *a, BcNum *restrict b, size_t scale)
Gavin Howard01055ba2018-11-03 11:00:21 -06002344{
2345 BcStatus s;
2346 BcNum num1, num2, half, f, fprime, *x0, *x1, *temp;
2347 size_t pow, len, digs, digs1, resrdx, req, times = 0;
2348 ssize_t cmp = 1, cmp1 = SSIZE_MAX, cmp2 = SSIZE_MAX;
2349
2350 req = BC_MAX(scale, a->rdx) + ((BC_NUM_INT(a) + 1) >> 1) + 1;
2351 bc_num_expand(b, req);
2352
2353 if (a->len == 0) {
2354 bc_num_setToZero(b, scale);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002355 RETURN_STATUS(BC_STATUS_SUCCESS);
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002356 } else if (a->neg) {
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002357 RETURN_STATUS(bc_error("negative number"));
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002358 } else if (BC_NUM_ONE(a)) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002359 bc_num_one(b);
2360 bc_num_extend(b, scale);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002361 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002362 }
2363
2364 scale = BC_MAX(scale, a->rdx) + 1;
2365 len = a->len + scale;
2366
2367 bc_num_init(&num1, len);
2368 bc_num_init(&num2, len);
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01002369 bc_num_init_DEF_SIZE(&half);
Gavin Howard01055ba2018-11-03 11:00:21 -06002370
2371 bc_num_one(&half);
2372 half.num[0] = 5;
2373 half.rdx = 1;
2374
2375 bc_num_init(&f, len);
2376 bc_num_init(&fprime, len);
2377
2378 x0 = &num1;
2379 x1 = &num2;
2380
2381 bc_num_one(x0);
2382 pow = BC_NUM_INT(a);
2383
2384 if (pow) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002385 if (pow & 1)
2386 x0->num[0] = 2;
2387 else
2388 x0->num[0] = 6;
2389
2390 pow -= 2 - (pow & 1);
2391
2392 bc_num_extend(x0, pow);
2393
2394 // Make sure to move the radix back.
2395 x0->rdx -= pow;
2396 }
2397
2398 x0->rdx = digs = digs1 = 0;
2399 resrdx = scale + 2;
2400 len = BC_NUM_INT(x0) + resrdx - 1;
2401
Denys Vlasenko71e1fc62018-12-02 19:43:34 +01002402 while (cmp != 0 || digs < len) {
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002403 s = zbc_num_div(a, x0, &f, resrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06002404 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002405 s = zbc_num_add(x0, &f, &fprime, resrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06002406 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002407 s = zbc_num_mul(&fprime, &half, x1, resrdx);
Gavin Howard01055ba2018-11-03 11:00:21 -06002408 if (s) goto err;
2409
2410 cmp = bc_num_cmp(x1, x0);
2411 digs = x1->len - (unsigned long long) llabs(cmp);
2412
2413 if (cmp == cmp2 && digs == digs1)
2414 times += 1;
2415 else
2416 times = 0;
2417
2418 resrdx += times > 4;
2419
2420 cmp2 = cmp1;
2421 cmp1 = cmp;
2422 digs1 = digs;
2423
2424 temp = x0;
2425 x0 = x1;
2426 x1 = temp;
2427 }
2428
Gavin Howard01055ba2018-11-03 11:00:21 -06002429 bc_num_copy(b, x0);
2430 scale -= 1;
2431 if (b->rdx > scale) bc_num_truncate(b, b->rdx - scale);
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002432 err:
Gavin Howard01055ba2018-11-03 11:00:21 -06002433 bc_num_free(&fprime);
2434 bc_num_free(&f);
2435 bc_num_free(&half);
2436 bc_num_free(&num2);
2437 bc_num_free(&num1);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002438 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002439}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002440#define zbc_num_sqrt(...) (zbc_num_sqrt(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002441
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002442static BC_STATUS zbc_num_divmod(BcNum *a, BcNum *b, BcNum *c, BcNum *d,
Gavin Howard01055ba2018-11-03 11:00:21 -06002443 size_t scale)
2444{
2445 BcStatus s;
2446 BcNum num2, *ptr_a;
2447 bool init = false;
2448 size_t ts = BC_MAX(scale + b->rdx, a->rdx), len = BC_NUM_MREQ(a, b, ts);
2449
2450 if (c == a) {
2451 memcpy(&num2, c, sizeof(BcNum));
2452 ptr_a = &num2;
2453 bc_num_init(c, len);
2454 init = true;
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002455 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06002456 ptr_a = a;
2457 bc_num_expand(c, len);
2458 }
2459
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002460 s = zbc_num_r(ptr_a, b, c, d, scale, ts);
Gavin Howard01055ba2018-11-03 11:00:21 -06002461
2462 if (init) bc_num_free(&num2);
2463
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002464 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002465}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002466#define zbc_num_divmod(...) (zbc_num_divmod(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002467
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01002468#if ENABLE_DC
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002469static BC_STATUS zbc_num_modexp(BcNum *a, BcNum *b, BcNum *c, BcNum *restrict d)
Gavin Howard01055ba2018-11-03 11:00:21 -06002470{
2471 BcStatus s;
2472 BcNum base, exp, two, temp;
2473
Denys Vlasenko60cf7472018-12-04 20:05:28 +01002474 if (c->len == 0)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002475 RETURN_STATUS(bc_error("divide by zero"));
Denys Vlasenko60cf7472018-12-04 20:05:28 +01002476 if (a->rdx || b->rdx || c->rdx)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002477 RETURN_STATUS(bc_error("non integer number"));
Denys Vlasenko60cf7472018-12-04 20:05:28 +01002478 if (b->neg)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002479 RETURN_STATUS(bc_error("negative number"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002480
2481 bc_num_expand(d, c->len);
2482 bc_num_init(&base, c->len);
2483 bc_num_init(&exp, b->len);
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01002484 bc_num_init_DEF_SIZE(&two);
Gavin Howard01055ba2018-11-03 11:00:21 -06002485 bc_num_init(&temp, b->len);
2486
2487 bc_num_one(&two);
2488 two.num[0] = 2;
2489 bc_num_one(d);
2490
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002491 s = zbc_num_rem(a, c, &base, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06002492 if (s) goto err;
2493 bc_num_copy(&exp, b);
2494
2495 while (exp.len != 0) {
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002496 s = zbc_num_divmod(&exp, &two, &exp, &temp, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06002497 if (s) goto err;
2498
2499 if (BC_NUM_ONE(&temp)) {
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002500 s = zbc_num_mul(d, &base, &temp, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06002501 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002502 s = zbc_num_rem(&temp, c, d, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06002503 if (s) goto err;
2504 }
2505
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002506 s = zbc_num_mul(&base, &base, &temp, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06002507 if (s) goto err;
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01002508 s = zbc_num_rem(&temp, c, &base, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06002509 if (s) goto err;
2510 }
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002511 err:
Gavin Howard01055ba2018-11-03 11:00:21 -06002512 bc_num_free(&temp);
2513 bc_num_free(&two);
2514 bc_num_free(&exp);
2515 bc_num_free(&base);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01002516 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002517}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002518#define zbc_num_modexp(...) (zbc_num_modexp(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002519#endif // ENABLE_DC
2520
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +01002521#if ENABLE_BC
Denys Vlasenko29301232018-12-11 15:29:32 +01002522static BC_STATUS zbc_func_insert(BcFunc *f, char *name, bool var)
Gavin Howard01055ba2018-11-03 11:00:21 -06002523{
2524 BcId a;
2525 size_t i;
2526
2527 for (i = 0; i < f->autos.len; ++i) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01002528 if (strcmp(name, ((BcId *) bc_vec_item(&f->autos, i))->name) == 0)
Denys Vlasenko29301232018-12-11 15:29:32 +01002529 RETURN_STATUS(bc_error("function parameter or auto var has the same name as another"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002530 }
2531
2532 a.idx = var;
2533 a.name = name;
2534
2535 bc_vec_push(&f->autos, &a);
2536
Denys Vlasenko29301232018-12-11 15:29:32 +01002537 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002538}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002539#define zbc_func_insert(...) (zbc_func_insert(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko23c2e9f2018-12-06 11:43:17 +01002540#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06002541
2542static void bc_func_init(BcFunc *f)
2543{
Denys Vlasenko7d628012018-12-04 21:46:47 +01002544 bc_char_vec_init(&f->code);
Gavin Howard01055ba2018-11-03 11:00:21 -06002545 bc_vec_init(&f->autos, sizeof(BcId), bc_id_free);
2546 bc_vec_init(&f->labels, sizeof(size_t), NULL);
2547 f->nparams = 0;
2548}
2549
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01002550static FAST_FUNC void bc_func_free(void *func)
Gavin Howard01055ba2018-11-03 11:00:21 -06002551{
2552 BcFunc *f = (BcFunc *) func;
2553 bc_vec_free(&f->code);
2554 bc_vec_free(&f->autos);
2555 bc_vec_free(&f->labels);
2556}
2557
Denys Vlasenkob0e37612018-12-05 21:03:16 +01002558static void bc_array_expand(BcVec *a, size_t len);
2559
Gavin Howard01055ba2018-11-03 11:00:21 -06002560static void bc_array_init(BcVec *a, bool nums)
2561{
2562 if (nums)
2563 bc_vec_init(a, sizeof(BcNum), bc_num_free);
2564 else
2565 bc_vec_init(a, sizeof(BcVec), bc_vec_free);
2566 bc_array_expand(a, 1);
2567}
2568
Gavin Howard01055ba2018-11-03 11:00:21 -06002569static void bc_array_expand(BcVec *a, size_t len)
2570{
2571 BcResultData data;
2572
2573 if (a->size == sizeof(BcNum) && a->dtor == bc_num_free) {
2574 while (len > a->len) {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01002575 bc_num_init_DEF_SIZE(&data.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06002576 bc_vec_push(a, &data.n);
2577 }
Denys Vlasenkoe2e6ffd2018-12-18 12:23:16 +01002578 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06002579 while (len > a->len) {
2580 bc_array_init(&data.v, true);
2581 bc_vec_push(a, &data.v);
2582 }
2583 }
2584}
2585
Denys Vlasenkob0e37612018-12-05 21:03:16 +01002586static void bc_array_copy(BcVec *d, const BcVec *s)
2587{
2588 size_t i;
2589
2590 bc_vec_pop_all(d);
2591 bc_vec_expand(d, s->cap);
2592 d->len = s->len;
2593
2594 for (i = 0; i < s->len; ++i) {
2595 BcNum *dnum = bc_vec_item(d, i), *snum = bc_vec_item(s, i);
2596 bc_num_init(dnum, snum->len);
2597 bc_num_copy(dnum, snum);
2598 }
2599}
2600
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01002601static FAST_FUNC void bc_string_free(void *string)
Gavin Howard01055ba2018-11-03 11:00:21 -06002602{
2603 free(*((char **) string));
2604}
2605
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01002606#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06002607static void bc_result_copy(BcResult *d, BcResult *src)
2608{
2609 d->t = src->t;
2610
2611 switch (d->t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002612 case BC_RESULT_TEMP:
2613 case BC_RESULT_IBASE:
2614 case BC_RESULT_SCALE:
2615 case BC_RESULT_OBASE:
Gavin Howard01055ba2018-11-03 11:00:21 -06002616 bc_num_init(&d->d.n, src->d.n.len);
2617 bc_num_copy(&d->d.n, &src->d.n);
2618 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06002619 case BC_RESULT_VAR:
2620 case BC_RESULT_ARRAY:
2621 case BC_RESULT_ARRAY_ELEM:
Gavin Howard01055ba2018-11-03 11:00:21 -06002622 d->d.id.name = xstrdup(src->d.id.name);
2623 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06002624 case BC_RESULT_CONSTANT:
2625 case BC_RESULT_LAST:
2626 case BC_RESULT_ONE:
2627 case BC_RESULT_STR:
Gavin Howard01055ba2018-11-03 11:00:21 -06002628 memcpy(&d->d.n, &src->d.n, sizeof(BcNum));
2629 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06002630 }
2631}
2632#endif // ENABLE_DC
2633
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01002634static FAST_FUNC void bc_result_free(void *result)
Gavin Howard01055ba2018-11-03 11:00:21 -06002635{
2636 BcResult *r = (BcResult *) result;
2637
2638 switch (r->t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002639 case BC_RESULT_TEMP:
2640 case BC_RESULT_IBASE:
2641 case BC_RESULT_SCALE:
2642 case BC_RESULT_OBASE:
Gavin Howard01055ba2018-11-03 11:00:21 -06002643 bc_num_free(&r->d.n);
2644 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06002645 case BC_RESULT_VAR:
2646 case BC_RESULT_ARRAY:
2647 case BC_RESULT_ARRAY_ELEM:
Gavin Howard01055ba2018-11-03 11:00:21 -06002648 free(r->d.id.name);
2649 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06002650 default:
Gavin Howard01055ba2018-11-03 11:00:21 -06002651 // Do nothing.
2652 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06002653 }
2654}
2655
2656static void bc_lex_lineComment(BcLex *l)
2657{
Denys Vlasenko55f3cab2018-12-18 14:37:16 +01002658 // Try: echo -n '#foo' | bc
2659 size_t i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002660 l->t.t = BC_LEX_WHITESPACE;
Denys Vlasenko55f3cab2018-12-18 14:37:16 +01002661 i = l->i;
2662 while (i < l->len && l->buf[i] != '\n')
2663 i++;
2664 l->i = i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002665}
2666
2667static void bc_lex_whitespace(BcLex *l)
2668{
Gavin Howard01055ba2018-11-03 11:00:21 -06002669 l->t.t = BC_LEX_WHITESPACE;
Denys Vlasenko89198a92018-12-13 21:31:29 +01002670 for (;;) {
2671 char c = l->buf[l->i];
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01002672 if (c == '\n') // this is BC_LEX_NLINE, not BC_LEX_WHITESPACE
2673 break;
2674 if (!isspace(c))
Denys Vlasenko89198a92018-12-13 21:31:29 +01002675 break;
2676 l->i++;
2677 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002678}
2679
Denys Vlasenko29301232018-12-11 15:29:32 +01002680static BC_STATUS zbc_lex_number(BcLex *l, char start)
Gavin Howard01055ba2018-11-03 11:00:21 -06002681{
2682 const char *buf = l->buf + l->i;
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002683 size_t len, i, ccnt;
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002684 bool pt;
Gavin Howard01055ba2018-11-03 11:00:21 -06002685
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002686 pt = (start == '.');
Gavin Howard01055ba2018-11-03 11:00:21 -06002687 l->t.t = BC_LEX_NUMBER;
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002688 ccnt = i = 0;
2689 for (;;) {
2690 char c = buf[i];
2691 if (c == '\0')
2692 break;
2693 if (c == '\\' && buf[i + 1] == '\n') {
2694 i += 2;
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002695 //number_of_backslashes++ - see comment below
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002696 continue;
Gavin Howard01055ba2018-11-03 11:00:21 -06002697 }
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002698 if (!isdigit(c) && (c < 'A' || c > 'F')) {
2699 if (c != '.') break;
2700 // if '.' was already seen, stop on second one:
2701 if (pt) break;
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002702 pt = true;
Gavin Howard01055ba2018-11-03 11:00:21 -06002703 }
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002704 // buf[i] is one of "0-9A-F."
2705 i++;
2706 if (c != '.')
2707 ccnt = i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002708 }
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002709 //ccnt is the number of chars in the number string, excluding possible
2710 //trailing "[\<newline>].[\<newline>]" (with any number of \<NL> repetitions).
2711 //i is buf[i] index of the first not-yet-parsed char after that.
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002712 l->i += i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002713
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002714 // This might overestimate the size, if there are "\<NL>"'s
2715 // in the number. Subtracting number_of_backslashes*2 correctly
2716 // is not that easy: consider that in the case of "NNN.\<NL>"
2717 // loop above will count "\<NL>" before it realizes it is not
2718 // in fact *inside* the number:
2719 len = ccnt + 1; // +1 byte for NUL termination
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002720
Denys Vlasenko64074a12018-12-07 15:50:14 +01002721 // This check makes sense only if size_t is (much) larger than BC_MAX_NUM.
2722 if (SIZE_MAX > (BC_MAX_NUM | 0xff)) {
2723 if (len > BC_MAX_NUM)
Denys Vlasenko29301232018-12-11 15:29:32 +01002724 RETURN_STATUS(bc_error("number too long: must be [1,"BC_MAX_NUM_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01002725 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002726
Denys Vlasenko7d628012018-12-04 21:46:47 +01002727 bc_vec_pop_all(&l->t.v);
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002728 bc_vec_expand(&l->t.v, 1 + len);
Gavin Howard01055ba2018-11-03 11:00:21 -06002729 bc_vec_push(&l->t.v, &start);
2730
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002731 while (ccnt != 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002732 // If we have hit a backslash, skip it. We don't have
2733 // to check for a newline because it's guaranteed.
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002734 if (*buf == '\\') {
2735 buf += 2;
2736 ccnt -= 2;
Gavin Howard01055ba2018-11-03 11:00:21 -06002737 continue;
2738 }
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002739 bc_vec_push(&l->t.v, buf);
2740 buf++;
2741 ccnt--;
Gavin Howard01055ba2018-11-03 11:00:21 -06002742 }
2743
Denys Vlasenko08c033c2018-12-05 16:55:08 +01002744 bc_vec_pushZeroByte(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06002745
Denys Vlasenko29301232018-12-11 15:29:32 +01002746 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002747}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002748#define zbc_lex_number(...) (zbc_lex_number(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002749
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002750static void bc_lex_name(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002751{
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002752 size_t i;
2753 const char *buf;
Gavin Howard01055ba2018-11-03 11:00:21 -06002754
2755 l->t.t = BC_LEX_NAME;
2756
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002757 i = 0;
2758 buf = l->buf + l->i - 1;
2759 for (;;) {
2760 char c = buf[i];
2761 if ((c < 'a' || c > 'z') && !isdigit(c) && c != '_') break;
2762 i++;
2763 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002764
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002765#if 0 // We do not protect against people with gigabyte-long names
Denys Vlasenko64074a12018-12-07 15:50:14 +01002766 // This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
2767 if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
2768 if (i > BC_MAX_STRING)
2769 return bc_error("name too long: must be [1,"BC_MAX_STRING_STR"]");
2770 }
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002771#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06002772 bc_vec_string(&l->t.v, i, buf);
2773
2774 // Increment the index. We minus 1 because it has already been incremented.
2775 l->i += i - 1;
2776
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002777 //return BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06002778}
2779
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01002780static void bc_lex_init(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002781{
Denys Vlasenko7d628012018-12-04 21:46:47 +01002782 bc_char_vec_init(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06002783}
2784
2785static void bc_lex_free(BcLex *l)
2786{
2787 bc_vec_free(&l->t.v);
2788}
2789
Denys Vlasenko0409ad32018-12-05 16:39:22 +01002790static void bc_lex_file(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002791{
Denys Vlasenko5318f812018-12-05 17:48:01 +01002792 G.err_line = l->line = 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06002793 l->newline = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06002794}
2795
Denys Vlasenkoe755e302018-12-13 22:25:28 +01002796IF_BC(static BC_STATUS zbc_lex_token(BcLex *l);)
2797IF_DC(static BC_STATUS zdc_lex_token(BcLex *l);)
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01002798
2799static BC_STATUS zcommon_lex_token(BcLex *l)
2800{
2801 if (IS_BC) {
2802 IF_BC(RETURN_STATUS(zbc_lex_token(l));)
2803 }
2804 IF_DC(RETURN_STATUS(zdc_lex_token(l));)
2805}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002806#define zcommon_lex_token(...) (zcommon_lex_token(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01002807
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002808static bool bc_lex_more_input(BcLex *l)
2809{
2810 size_t str;
2811 bool comment;
2812
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002813 bc_vec_pop_all(&G.input_buffer);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002814
2815 // This loop is complex because the vm tries not to send any lines that end
2816 // with a backslash to the parser. The reason for that is because the parser
2817 // treats a backslash+newline combo as whitespace, per the bc spec. In that
2818 // case, and for strings and comments, the parser will expect more stuff.
2819 comment = false;
2820 str = 0;
2821 for (;;) {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002822 size_t prevlen = G.input_buffer.len;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002823 char *string;
2824
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002825 bc_read_line(&G.input_buffer, G.input_fp);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002826 // No more input means EOF
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002827 if (G.input_buffer.len <= prevlen + 1) // (we expect +1 for NUL byte)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002828 break;
2829
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002830 string = G.input_buffer.v + prevlen;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002831 while (*string) {
2832 char c = *string;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002833 if (string == G.input_buffer.v || string[-1] != '\\') {
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002834 if (IS_BC)
2835 str ^= (c == '"');
2836 else {
2837 if (c == ']')
2838 str -= 1;
2839 else if (c == '[')
2840 str += 1;
2841 }
2842 }
2843 string++;
2844 if (c == '/' && *string == '*') {
2845 comment = true;
2846 string++;
2847 continue;
2848 }
2849 if (c == '*' && *string == '/') {
2850 comment = false;
2851 string++;
2852 }
2853 }
2854 if (str != 0 || comment) {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002855 G.input_buffer.len--; // backstep over the trailing NUL byte
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002856 continue;
2857 }
2858
2859 // Check for backslash+newline.
2860 // we do not check that last char is '\n' -
2861 // if it is not, then it's EOF, and looping back
2862 // to bc_read_line() will detect it:
2863 string -= 2;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002864 if (string >= G.input_buffer.v && *string == '\\') {
2865 G.input_buffer.len--;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002866 continue;
2867 }
2868
2869 break;
2870 }
2871
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002872 l->buf = G.input_buffer.v;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002873 l->i = 0;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002874// bb_error_msg("G.input_buffer.len:%d '%s'", G.input_buffer.len, G.input_buffer.v);
2875 l->len = G.input_buffer.len - 1; // do not include NUL
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002876
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002877 return l->len != 0;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002878}
2879
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002880static BC_STATUS zbc_lex_next(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002881{
2882 BcStatus s;
2883
2884 l->t.last = l->t.t;
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002885 if (l->t.last == BC_LEX_EOF) RETURN_STATUS(bc_error("end of file"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002886
2887 l->line += l->newline;
Denys Vlasenko5318f812018-12-05 17:48:01 +01002888 G.err_line = l->line;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002889 l->newline = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06002890
2891 // Loop until failure or we don't have whitespace. This
2892 // is so the parser doesn't get inundated with whitespace.
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01002893 // Comments are also BC_LEX_WHITESPACE tokens and eaten here.
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002894 s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06002895 do {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002896 if (l->i == l->len) {
Denys Vlasenko55f3cab2018-12-18 14:37:16 +01002897 l->t.t = BC_LEX_EOF;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002898 if (!G.input_fp)
2899 RETURN_STATUS(BC_STATUS_SUCCESS);
2900 if (!bc_lex_more_input(l)) {
2901 G.input_fp = NULL;
2902 RETURN_STATUS(BC_STATUS_SUCCESS);
2903 }
2904 // here it's guaranteed that l->i is below l->len
2905 }
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01002906 dbg_lex("next string to parse:'%.*s'",
Denys Vlasenko0a238142018-12-14 16:48:34 +01002907 (int)(strchrnul(l->buf + l->i, '\n') - (l->buf + l->i)),
2908 l->buf + l->i);
Denys Vlasenkoec603182018-12-17 10:34:02 +01002909 s = zcommon_lex_token(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06002910 } while (!s && l->t.t == BC_LEX_WHITESPACE);
Denys Vlasenko17df8822018-12-14 23:00:24 +01002911 dbg_lex("l->t.t from string:%d", l->t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06002912
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002913 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002914}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002915#define zbc_lex_next(...) (zbc_lex_next(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002916
Denys Vlasenko202dd192018-12-16 17:30:35 +01002917static BC_STATUS zbc_lex_skip_if_at_NLINE(BcLex *l)
2918{
2919 if (l->t.t == BC_LEX_NLINE)
2920 RETURN_STATUS(zbc_lex_next(l));
2921 RETURN_STATUS(BC_STATUS_SUCCESS);
2922}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002923#define zbc_lex_skip_if_at_NLINE(...) (zbc_lex_skip_if_at_NLINE(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko202dd192018-12-16 17:30:35 +01002924
2925static BC_STATUS zbc_lex_next_and_skip_NLINE(BcLex *l)
2926{
2927 BcStatus s;
2928 s = zbc_lex_next(l);
2929 if (s) RETURN_STATUS(s);
2930 // if(cond)<newline>stmt is accepted too (but not 2+ newlines)
2931 s = zbc_lex_skip_if_at_NLINE(l);
2932 RETURN_STATUS(s);
2933}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002934#define zbc_lex_next_and_skip_NLINE(...) (zbc_lex_next_and_skip_NLINE(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko202dd192018-12-16 17:30:35 +01002935
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01002936static BC_STATUS zbc_lex_text_init(BcLex *l, const char *text)
Gavin Howard01055ba2018-11-03 11:00:21 -06002937{
2938 l->buf = text;
2939 l->i = 0;
2940 l->len = strlen(text);
2941 l->t.t = l->t.last = BC_LEX_INVALID;
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002942 RETURN_STATUS(zbc_lex_next(l));
Gavin Howard01055ba2018-11-03 11:00:21 -06002943}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002944#define zbc_lex_text_init(...) (zbc_lex_text_init(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002945
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01002946#if ENABLE_BC
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002947static BC_STATUS zbc_lex_identifier(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002948{
2949 BcStatus s;
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002950 unsigned i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002951 const char *buf = l->buf + l->i - 1;
2952
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002953 for (i = 0; i < ARRAY_SIZE(bc_lex_kws); ++i) {
2954 const char *keyword8 = bc_lex_kws[i].name8;
2955 unsigned j = 0;
2956 while (buf[j] != '\0' && buf[j] == keyword8[j]) {
2957 j++;
2958 if (j == 8) goto match;
Gavin Howard01055ba2018-11-03 11:00:21 -06002959 }
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002960 if (keyword8[j] != '\0')
2961 continue;
2962 match:
2963 // buf starts with keyword bc_lex_kws[i]
2964 l->t.t = BC_LEX_KEY_1st_keyword + i;
Denys Vlasenkod00d2f92018-12-06 12:59:40 +01002965 if (!bc_lex_kws_POSIX(i)) {
Denys Vlasenko0d7e46b2018-12-05 18:31:19 +01002966 s = bc_posix_error_fmt("%sthe '%.8s' keyword", "POSIX does not allow ", bc_lex_kws[i].name8);
Denys Vlasenkoec603182018-12-17 10:34:02 +01002967 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002968 }
2969
2970 // We minus 1 because the index has already been incremented.
2971 l->i += j - 1;
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002972 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002973 }
2974
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002975 bc_lex_name(l);
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002976 s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06002977
Denys Vlasenko0d7e46b2018-12-05 18:31:19 +01002978 if (l->t.v.len > 2) {
2979 // Prevent this:
2980 // >>> qwe=1
2981 // bc: POSIX only allows one character names; the following is bad: 'qwe=1
2982 // '
2983 unsigned len = strchrnul(buf, '\n') - buf;
2984 s = bc_posix_error_fmt("POSIX only allows one character names; the following is bad: '%.*s'", len, buf);
2985 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002986
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002987 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002988}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002989#define zbc_lex_identifier(...) (zbc_lex_identifier(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002990
Denys Vlasenko26819db2018-12-12 16:08:46 +01002991static BC_STATUS zbc_lex_string(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002992{
Denys Vlasenko07597cd2018-12-18 14:03:20 +01002993 size_t len, nls, i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002994
2995 l->t.t = BC_LEX_STR;
2996
Denys Vlasenko07597cd2018-12-18 14:03:20 +01002997 nls = 0;
2998 i = l->i;
2999 for (;;) {
3000 char c = l->buf[i];
3001 if (c == '\0') {
3002 l->i = i;
3003 RETURN_STATUS(bc_error("string end could not be found"));
3004 }
3005 if (c == '"')
3006 break;
Denys Vlasenko26819db2018-12-12 16:08:46 +01003007 nls += (c == '\n');
Denys Vlasenko07597cd2018-12-18 14:03:20 +01003008 i++;
Gavin Howard01055ba2018-11-03 11:00:21 -06003009 }
3010
3011 len = i - l->i;
Denys Vlasenko64074a12018-12-07 15:50:14 +01003012 // This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
3013 if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
3014 if (len > BC_MAX_STRING)
Denys Vlasenko9811ad02018-12-12 23:25:13 +01003015 RETURN_STATUS(bc_error("string too long: must be [1,"BC_MAX_STRING_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01003016 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003017 bc_vec_string(&l->t.v, len, l->buf + l->i);
3018
3019 l->i = i + 1;
3020 l->line += nls;
Denys Vlasenko5318f812018-12-05 17:48:01 +01003021 G.err_line = l->line;
Gavin Howard01055ba2018-11-03 11:00:21 -06003022
Denys Vlasenko26819db2018-12-12 16:08:46 +01003023 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003024}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003025#define zbc_lex_string(...) (zbc_lex_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003026
Denys Vlasenko0a238142018-12-14 16:48:34 +01003027static void bc_lex_assign(BcLex *l, unsigned with_and_without)
Gavin Howard01055ba2018-11-03 11:00:21 -06003028{
3029 if (l->buf[l->i] == '=') {
3030 ++l->i;
Denys Vlasenko0a238142018-12-14 16:48:34 +01003031 with_and_without >>= 8; // store "with" value
3032 } // else store "without" value
3033 l->t.t = (with_and_without & 0xff);
Gavin Howard01055ba2018-11-03 11:00:21 -06003034}
Denys Vlasenko0a238142018-12-14 16:48:34 +01003035#define bc_lex_assign(l, with, without) \
3036 bc_lex_assign(l, ((with)<<8)|(without))
Gavin Howard01055ba2018-11-03 11:00:21 -06003037
Denys Vlasenko29301232018-12-11 15:29:32 +01003038static BC_STATUS zbc_lex_comment(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003039{
3040 size_t i, nls = 0;
3041 const char *buf = l->buf;
Gavin Howard01055ba2018-11-03 11:00:21 -06003042
3043 l->t.t = BC_LEX_WHITESPACE;
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003044 i = l->i; /* here buf[l->i] is the '*' of opening comment delimiter */
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003045 for (;;) {
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003046 char c = buf[++i];
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003047 check_star:
3048 if (c == '*') {
3049 c = buf[++i];
3050 if (c == '/')
3051 break;
3052 goto check_star;
3053 }
3054 if (c == '\0') {
Gavin Howard01055ba2018-11-03 11:00:21 -06003055 l->i = i;
Denys Vlasenko29301232018-12-11 15:29:32 +01003056 RETURN_STATUS(bc_error("comment end could not be found"));
Gavin Howard01055ba2018-11-03 11:00:21 -06003057 }
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003058 nls += (c == '\n');
Gavin Howard01055ba2018-11-03 11:00:21 -06003059 }
3060
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003061 l->i = i + 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06003062 l->line += nls;
Denys Vlasenko5318f812018-12-05 17:48:01 +01003063 G.err_line = l->line;
Gavin Howard01055ba2018-11-03 11:00:21 -06003064
Denys Vlasenko29301232018-12-11 15:29:32 +01003065 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003066}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003067#define zbc_lex_comment(...) (zbc_lex_comment(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003068
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003069static BC_STATUS zbc_lex_token(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003070{
3071 BcStatus s = BC_STATUS_SUCCESS;
3072 char c = l->buf[l->i++], c2;
3073
3074 // This is the workhorse of the lexer.
3075 switch (c) {
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003076// case '\0': // probably never reached
3077// l->i--;
3078// l->t.t = BC_LEX_EOF;
3079// l->newline = true;
3080// break;
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003081 case '\n':
3082 l->t.t = BC_LEX_NLINE;
3083 l->newline = true;
Gavin Howard01055ba2018-11-03 11:00:21 -06003084 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003085 case '\t':
3086 case '\v':
3087 case '\f':
3088 case '\r':
3089 case ' ':
Gavin Howard01055ba2018-11-03 11:00:21 -06003090 bc_lex_whitespace(l);
3091 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003092 case '!':
Gavin Howard01055ba2018-11-03 11:00:21 -06003093 bc_lex_assign(l, BC_LEX_OP_REL_NE, BC_LEX_OP_BOOL_NOT);
Gavin Howard01055ba2018-11-03 11:00:21 -06003094 if (l->t.t == BC_LEX_OP_BOOL_NOT) {
Denys Vlasenko00646792018-12-05 18:12:27 +01003095 s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("!");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003096 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003097 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003098 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003099 case '"':
Denys Vlasenko26819db2018-12-12 16:08:46 +01003100 s = zbc_lex_string(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003101 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003102 case '#':
Denys Vlasenko00646792018-12-05 18:12:27 +01003103 s = bc_POSIX_does_not_allow("'#' script comments");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003104 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003105 bc_lex_lineComment(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003106 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003107 case '%':
Gavin Howard01055ba2018-11-03 11:00:21 -06003108 bc_lex_assign(l, BC_LEX_OP_ASSIGN_MODULUS, BC_LEX_OP_MODULUS);
3109 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003110 case '&':
Gavin Howard01055ba2018-11-03 11:00:21 -06003111 c2 = l->buf[l->i];
3112 if (c2 == '&') {
Denys Vlasenko00646792018-12-05 18:12:27 +01003113 s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("&&");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003114 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003115 ++l->i;
3116 l->t.t = BC_LEX_OP_BOOL_AND;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003117 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003118 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003119 s = bc_error_bad_character('&');
Gavin Howard01055ba2018-11-03 11:00:21 -06003120 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003121 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003122 case '(':
3123 case ')':
Gavin Howard01055ba2018-11-03 11:00:21 -06003124 l->t.t = (BcLexType)(c - '(' + BC_LEX_LPAREN);
3125 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003126 case '*':
Gavin Howard01055ba2018-11-03 11:00:21 -06003127 bc_lex_assign(l, BC_LEX_OP_ASSIGN_MULTIPLY, BC_LEX_OP_MULTIPLY);
3128 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003129 case '+':
Gavin Howard01055ba2018-11-03 11:00:21 -06003130 c2 = l->buf[l->i];
3131 if (c2 == '+') {
3132 ++l->i;
3133 l->t.t = BC_LEX_OP_INC;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003134 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06003135 bc_lex_assign(l, BC_LEX_OP_ASSIGN_PLUS, BC_LEX_OP_PLUS);
3136 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003137 case ',':
Gavin Howard01055ba2018-11-03 11:00:21 -06003138 l->t.t = BC_LEX_COMMA;
3139 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003140 case '-':
Gavin Howard01055ba2018-11-03 11:00:21 -06003141 c2 = l->buf[l->i];
3142 if (c2 == '-') {
3143 ++l->i;
3144 l->t.t = BC_LEX_OP_DEC;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003145 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06003146 bc_lex_assign(l, BC_LEX_OP_ASSIGN_MINUS, BC_LEX_OP_MINUS);
3147 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003148 case '.':
Gavin Howard01055ba2018-11-03 11:00:21 -06003149 if (isdigit(l->buf[l->i]))
Denys Vlasenko29301232018-12-11 15:29:32 +01003150 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003151 else {
3152 l->t.t = BC_LEX_KEY_LAST;
Denys Vlasenko00646792018-12-05 18:12:27 +01003153 s = bc_POSIX_does_not_allow("a period ('.') as a shortcut for the last result");
Gavin Howard01055ba2018-11-03 11:00:21 -06003154 }
3155 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003156 case '/':
Gavin Howard01055ba2018-11-03 11:00:21 -06003157 c2 = l->buf[l->i];
3158 if (c2 == '*')
Denys Vlasenko29301232018-12-11 15:29:32 +01003159 s = zbc_lex_comment(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003160 else
3161 bc_lex_assign(l, BC_LEX_OP_ASSIGN_DIVIDE, BC_LEX_OP_DIVIDE);
3162 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003163 case '0':
3164 case '1':
3165 case '2':
3166 case '3':
3167 case '4':
3168 case '5':
3169 case '6':
3170 case '7':
3171 case '8':
3172 case '9':
3173 case 'A':
3174 case 'B':
3175 case 'C':
3176 case 'D':
3177 case 'E':
3178 case 'F':
Denys Vlasenko29301232018-12-11 15:29:32 +01003179 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003180 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003181 case ';':
Gavin Howard01055ba2018-11-03 11:00:21 -06003182 l->t.t = BC_LEX_SCOLON;
3183 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003184 case '<':
Gavin Howard01055ba2018-11-03 11:00:21 -06003185 bc_lex_assign(l, BC_LEX_OP_REL_LE, BC_LEX_OP_REL_LT);
3186 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003187 case '=':
Gavin Howard01055ba2018-11-03 11:00:21 -06003188 bc_lex_assign(l, BC_LEX_OP_REL_EQ, BC_LEX_OP_ASSIGN);
3189 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003190 case '>':
Gavin Howard01055ba2018-11-03 11:00:21 -06003191 bc_lex_assign(l, BC_LEX_OP_REL_GE, BC_LEX_OP_REL_GT);
3192 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003193 case '[':
3194 case ']':
Gavin Howard01055ba2018-11-03 11:00:21 -06003195 l->t.t = (BcLexType)(c - '[' + BC_LEX_LBRACKET);
3196 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003197 case '\\':
Gavin Howard01055ba2018-11-03 11:00:21 -06003198 if (l->buf[l->i] == '\n') {
3199 l->t.t = BC_LEX_WHITESPACE;
3200 ++l->i;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003201 } else
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003202 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003203 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003204 case '^':
Gavin Howard01055ba2018-11-03 11:00:21 -06003205 bc_lex_assign(l, BC_LEX_OP_ASSIGN_POWER, BC_LEX_OP_POWER);
3206 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003207 case 'a':
3208 case 'b':
3209 case 'c':
3210 case 'd':
3211 case 'e':
3212 case 'f':
3213 case 'g':
3214 case 'h':
3215 case 'i':
3216 case 'j':
3217 case 'k':
3218 case 'l':
3219 case 'm':
3220 case 'n':
3221 case 'o':
3222 case 'p':
3223 case 'q':
3224 case 'r':
3225 case 's':
3226 case 't':
3227 case 'u':
3228 case 'v':
3229 case 'w':
3230 case 'x':
3231 case 'y':
3232 case 'z':
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003233 s = zbc_lex_identifier(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003234 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003235 case '{':
3236 case '}':
Gavin Howard01055ba2018-11-03 11:00:21 -06003237 l->t.t = (BcLexType)(c - '{' + BC_LEX_LBRACE);
3238 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003239 case '|':
Gavin Howard01055ba2018-11-03 11:00:21 -06003240 c2 = l->buf[l->i];
Gavin Howard01055ba2018-11-03 11:00:21 -06003241 if (c2 == '|') {
Denys Vlasenko00646792018-12-05 18:12:27 +01003242 s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("||");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003243 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003244 ++l->i;
3245 l->t.t = BC_LEX_OP_BOOL_OR;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003246 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003247 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003248 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003249 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003250 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003251 default:
Gavin Howard01055ba2018-11-03 11:00:21 -06003252 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003253 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003254 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003255 }
3256
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003257 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003258}
3259#endif // ENABLE_BC
3260
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01003261#if ENABLE_DC
Denys Vlasenko29301232018-12-11 15:29:32 +01003262static BC_STATUS zdc_lex_register(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003263{
Gavin Howard01055ba2018-11-03 11:00:21 -06003264 if (isspace(l->buf[l->i - 1])) {
3265 bc_lex_whitespace(l);
3266 ++l->i;
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01003267 if (!G_exreg)
Denys Vlasenko29301232018-12-11 15:29:32 +01003268 RETURN_STATUS(bc_error("extended register"));
3269 bc_lex_name(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003270 }
3271 else {
Denys Vlasenko7d628012018-12-04 21:46:47 +01003272 bc_vec_pop_all(&l->t.v);
Denys Vlasenkoe55a5722018-12-06 12:47:17 +01003273 bc_vec_push(&l->t.v, &l->buf[l->i - 1]);
Denys Vlasenko08c033c2018-12-05 16:55:08 +01003274 bc_vec_pushZeroByte(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06003275 l->t.t = BC_LEX_NAME;
3276 }
3277
Denys Vlasenko29301232018-12-11 15:29:32 +01003278 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003279}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003280#define zdc_lex_register(...) (zdc_lex_register(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003281
Denys Vlasenko29301232018-12-11 15:29:32 +01003282static BC_STATUS zdc_lex_string(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003283{
Denys Vlasenkoef271da2018-12-18 13:48:37 +01003284 size_t depth, nls, i;
Gavin Howard01055ba2018-11-03 11:00:21 -06003285
3286 l->t.t = BC_LEX_STR;
Denys Vlasenko7d628012018-12-04 21:46:47 +01003287 bc_vec_pop_all(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06003288
Denys Vlasenkoef271da2018-12-18 13:48:37 +01003289 nls = 0;
3290 depth = 1;
3291 i = l->i;
3292 for (;;) {
3293 char c = l->buf[i];
3294 if (c == '\0') {
3295 l->i = i;
3296 RETURN_STATUS(bc_error("string end could not be found"));
3297 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003298 nls += (c == '\n');
Denys Vlasenkoef271da2018-12-18 13:48:37 +01003299 if (i == l->i || l->buf[i - 1] != '\\') {
3300 if (c == '[') depth++;
3301 if (c == ']')
3302 if (--depth == 0)
3303 break;
3304 }
3305 bc_vec_push(&l->t.v, &l->buf[i]);
3306 i++;
Gavin Howard01055ba2018-11-03 11:00:21 -06003307 }
Denys Vlasenkoef271da2018-12-18 13:48:37 +01003308 i++;
Gavin Howard01055ba2018-11-03 11:00:21 -06003309
Denys Vlasenko08c033c2018-12-05 16:55:08 +01003310 bc_vec_pushZeroByte(&l->t.v);
Denys Vlasenko64074a12018-12-07 15:50:14 +01003311 // This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
3312 if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
3313 if (i - l->i > BC_MAX_STRING)
Denys Vlasenko29301232018-12-11 15:29:32 +01003314 RETURN_STATUS(bc_error("string too long: must be [1,"BC_MAX_STRING_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01003315 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003316
3317 l->i = i;
3318 l->line += nls;
Denys Vlasenko5318f812018-12-05 17:48:01 +01003319 G.err_line = l->line;
Gavin Howard01055ba2018-11-03 11:00:21 -06003320
Denys Vlasenko29301232018-12-11 15:29:32 +01003321 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003322}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003323#define zdc_lex_string(...) (zdc_lex_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003324
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003325static BC_STATUS zdc_lex_token(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003326{
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003327 static const //BcLexType - should be this type, but narrower type saves size:
3328 uint8_t
3329 dc_lex_regs[] = {
3330 BC_LEX_OP_REL_EQ, BC_LEX_OP_REL_LE, BC_LEX_OP_REL_GE, BC_LEX_OP_REL_NE,
3331 BC_LEX_OP_REL_LT, BC_LEX_OP_REL_GT, BC_LEX_SCOLON, BC_LEX_COLON,
3332 BC_LEX_ELSE, BC_LEX_LOAD, BC_LEX_LOAD_POP, BC_LEX_OP_ASSIGN,
3333 BC_LEX_STORE_PUSH,
3334 };
3335 static const //BcLexType - should be this type
3336 uint8_t
3337 dc_lex_tokens[] = {
3338 /* %&'( */
3339 BC_LEX_OP_MODULUS, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_LPAREN,
3340 /* )*+, */
3341 BC_LEX_INVALID, BC_LEX_OP_MULTIPLY, BC_LEX_OP_PLUS, BC_LEX_INVALID,
3342 /* -./ */
3343 BC_LEX_OP_MINUS, BC_LEX_INVALID, BC_LEX_OP_DIVIDE,
3344 /* 0123456789 */
3345 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3346 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3347 BC_LEX_INVALID, BC_LEX_INVALID,
3348 /* :;<=>?@ */
3349 BC_LEX_COLON, BC_LEX_SCOLON, BC_LEX_OP_REL_GT, BC_LEX_OP_REL_EQ,
3350 BC_LEX_OP_REL_LT, BC_LEX_KEY_READ, BC_LEX_INVALID,
3351 /* ABCDEFGH */
3352 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3353 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_EQ_NO_REG, BC_LEX_INVALID,
3354 /* IJKLMNOP */
3355 BC_LEX_KEY_IBASE, BC_LEX_INVALID, BC_LEX_KEY_SCALE, BC_LEX_LOAD_POP,
3356 BC_LEX_INVALID, BC_LEX_OP_BOOL_NOT, BC_LEX_KEY_OBASE, BC_LEX_PRINT_STREAM,
3357 /* QRSTUVWXY */
3358 BC_LEX_NQUIT, BC_LEX_POP, BC_LEX_STORE_PUSH, BC_LEX_INVALID, BC_LEX_INVALID,
3359 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_SCALE_FACTOR, BC_LEX_INVALID,
3360 /* Z[\] */
3361 BC_LEX_KEY_LENGTH, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3362 /* ^_` */
3363 BC_LEX_OP_POWER, BC_LEX_NEG, BC_LEX_INVALID,
3364 /* abcdefgh */
3365 BC_LEX_ASCIIFY, BC_LEX_INVALID, BC_LEX_CLEAR_STACK, BC_LEX_DUPLICATE,
3366 BC_LEX_ELSE, BC_LEX_PRINT_STACK, BC_LEX_INVALID, BC_LEX_INVALID,
3367 /* ijklmnop */
3368 BC_LEX_STORE_IBASE, BC_LEX_INVALID, BC_LEX_STORE_SCALE, BC_LEX_LOAD,
3369 BC_LEX_INVALID, BC_LEX_PRINT_POP, BC_LEX_STORE_OBASE, BC_LEX_KEY_PRINT,
3370 /* qrstuvwx */
3371 BC_LEX_KEY_QUIT, BC_LEX_SWAP, BC_LEX_OP_ASSIGN, BC_LEX_INVALID,
3372 BC_LEX_INVALID, BC_LEX_KEY_SQRT, BC_LEX_INVALID, BC_LEX_EXECUTE,
3373 /* yz */
3374 BC_LEX_INVALID, BC_LEX_STACK_LEVEL,
3375 /* {|}~ */
3376 BC_LEX_LBRACE, BC_LEX_OP_MODEXP, BC_LEX_INVALID, BC_LEX_OP_DIVMOD,
3377 };
3378
Gavin Howard01055ba2018-11-03 11:00:21 -06003379 BcStatus s = BC_STATUS_SUCCESS;
3380 char c = l->buf[l->i++], c2;
3381 size_t i;
3382
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01003383 for (i = 0; i < ARRAY_SIZE(dc_lex_regs); ++i) {
3384 if (l->t.last == dc_lex_regs[i])
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003385 RETURN_STATUS(zdc_lex_register(l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003386 }
3387
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003388 if (c >= '%' && c <= '~'
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003389 && (l->t.t = dc_lex_tokens[c - '%']) != BC_LEX_INVALID
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003390 ) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003391 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003392 }
3393
3394 // This is the workhorse of the lexer.
3395 switch (c) {
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003396// case '\0': // probably never reached
3397// l->t.t = BC_LEX_EOF;
3398// break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003399 case '\n':
3400 case '\t':
3401 case '\v':
3402 case '\f':
3403 case '\r':
3404 case ' ':
Gavin Howard01055ba2018-11-03 11:00:21 -06003405 l->newline = (c == '\n');
3406 bc_lex_whitespace(l);
3407 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003408 case '!':
Gavin Howard01055ba2018-11-03 11:00:21 -06003409 c2 = l->buf[l->i];
Gavin Howard01055ba2018-11-03 11:00:21 -06003410 if (c2 == '=')
3411 l->t.t = BC_LEX_OP_REL_NE;
3412 else if (c2 == '<')
3413 l->t.t = BC_LEX_OP_REL_LE;
3414 else if (c2 == '>')
3415 l->t.t = BC_LEX_OP_REL_GE;
3416 else
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003417 RETURN_STATUS(bc_error_bad_character(c));
Gavin Howard01055ba2018-11-03 11:00:21 -06003418 ++l->i;
3419 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003420 case '#':
Gavin Howard01055ba2018-11-03 11:00:21 -06003421 bc_lex_lineComment(l);
3422 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003423 case '.':
Gavin Howard01055ba2018-11-03 11:00:21 -06003424 if (isdigit(l->buf[l->i]))
Denys Vlasenko29301232018-12-11 15:29:32 +01003425 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003426 else
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003427 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003428 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003429 case '0':
3430 case '1':
3431 case '2':
3432 case '3':
3433 case '4':
3434 case '5':
3435 case '6':
3436 case '7':
3437 case '8':
3438 case '9':
3439 case 'A':
3440 case 'B':
3441 case 'C':
3442 case 'D':
3443 case 'E':
3444 case 'F':
Denys Vlasenko29301232018-12-11 15:29:32 +01003445 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003446 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003447 case '[':
Denys Vlasenko29301232018-12-11 15:29:32 +01003448 s = zdc_lex_string(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003449 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003450 default:
Gavin Howard01055ba2018-11-03 11:00:21 -06003451 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003452 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003453 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003454 }
3455
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003456 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003457}
3458#endif // ENABLE_DC
3459
Denys Vlasenkob6f60862018-12-06 12:54:26 +01003460static void bc_program_addFunc(char *name, size_t *idx);
3461
Gavin Howard01055ba2018-11-03 11:00:21 -06003462static void bc_parse_addFunc(BcParse *p, char *name, size_t *idx)
3463{
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003464 bc_program_addFunc(name, idx);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003465 p->func = bc_program_func(p->fidx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003466}
3467
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01003468static void bc_parse_push(BcParse *p, char i)
3469{
3470 dbg_lex("%s:%d pushing opcode %d", __func__, __LINE__, i);
3471 bc_vec_pushByte(&p->func->code, i);
3472}
Denys Vlasenkob23ac512018-12-06 13:10:56 +01003473
Gavin Howard01055ba2018-11-03 11:00:21 -06003474static void bc_parse_pushName(BcParse *p, char *name)
3475{
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01003476 while (*name)
3477 bc_parse_push(p, *name++);
Gavin Howard01055ba2018-11-03 11:00:21 -06003478 bc_parse_push(p, BC_PARSE_STREND);
Gavin Howard01055ba2018-11-03 11:00:21 -06003479}
3480
3481static void bc_parse_pushIndex(BcParse *p, size_t idx)
3482{
Denys Vlasenkoc2da68e2018-12-12 16:44:34 +01003483 size_t mask;
3484 unsigned amt;
Gavin Howard01055ba2018-11-03 11:00:21 -06003485
Denys Vlasenkof4f10722018-12-18 02:23:53 +01003486 dbg_lex("%s:%d pushing index %zd", __func__, __LINE__, idx);
Denys Vlasenkoc2da68e2018-12-12 16:44:34 +01003487 mask = ((size_t)0xff) << (sizeof(idx) * 8 - 8);
3488 amt = sizeof(idx);
3489 do {
3490 if (idx & mask) break;
3491 mask >>= 8;
3492 amt--;
3493 } while (amt != 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06003494
3495 bc_parse_push(p, amt);
Denys Vlasenkoc2da68e2018-12-12 16:44:34 +01003496
3497 while (idx != 0) {
3498 bc_parse_push(p, (unsigned char)idx);
3499 idx >>= 8;
3500 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003501}
3502
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003503static void bc_parse_pushJUMP(BcParse *p, size_t idx)
3504{
3505 bc_parse_push(p, BC_INST_JUMP);
3506 bc_parse_pushIndex(p, idx);
3507}
3508
3509static void bc_parse_pushJUMP_ZERO(BcParse *p, size_t idx)
3510{
3511 bc_parse_push(p, BC_INST_JUMP_ZERO);
3512 bc_parse_pushIndex(p, idx);
3513}
3514
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003515static void bc_parse_number(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003516{
3517 char *num = xstrdup(p->l.t.v.v);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003518 size_t idx = G.prog.consts.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06003519
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003520 bc_vec_push(&G.prog.consts, &num);
Gavin Howard01055ba2018-11-03 11:00:21 -06003521
3522 bc_parse_push(p, BC_INST_NUM);
3523 bc_parse_pushIndex(p, idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003524}
3525
Denys Vlasenko99b37622018-12-15 20:06:59 +01003526IF_BC(static BC_STATUS zbc_parse_stmt_or_funcdef(BcParse *p);)
Denys Vlasenkoe755e302018-12-13 22:25:28 +01003527IF_DC(static BC_STATUS zdc_parse_parse(BcParse *p);)
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003528
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003529// "Parse" half of "parse,execute,repeat" main loop
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003530static BC_STATUS zcommon_parse(BcParse *p)
3531{
3532 if (IS_BC) {
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003533// FIXME: "eating" of stmt delemiters is coded inconsistently
3534// (sometimes zbc_parse_stmt() eats the delimiter, sometimes don't),
3535// which causes bugs such as "print 1 print 2" erroneously accepted,
3536// or "print 1 else 2" detecting parse error only after executing
3537// "print 1" part.
Denys Vlasenko99b37622018-12-15 20:06:59 +01003538 IF_BC(RETURN_STATUS(zbc_parse_stmt_or_funcdef(p));)
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003539 }
3540 IF_DC(RETURN_STATUS(zdc_parse_parse(p));)
3541}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003542#define zcommon_parse(...) (zcommon_parse(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003543
Denys Vlasenkof86e9602018-12-14 17:01:56 +01003544static BC_STATUS zbc_parse_text_init(BcParse *p, const char *text)
Gavin Howard01055ba2018-11-03 11:00:21 -06003545{
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003546 p->func = bc_program_func(p->fidx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003547
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01003548 RETURN_STATUS(zbc_lex_text_init(&p->l, text));
Gavin Howard01055ba2018-11-03 11:00:21 -06003549}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003550#define zbc_parse_text_init(...) (zbc_parse_text_init(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003551
Denys Vlasenkob6f60862018-12-06 12:54:26 +01003552// Called when parsing or execution detects a failure,
3553// resets execution structures.
3554static void bc_program_reset(void)
3555{
3556 BcFunc *f;
3557 BcInstPtr *ip;
3558
3559 bc_vec_npop(&G.prog.stack, G.prog.stack.len - 1);
3560 bc_vec_pop_all(&G.prog.results);
3561
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003562 f = bc_program_func(0);
Denys Vlasenkob6f60862018-12-06 12:54:26 +01003563 ip = bc_vec_top(&G.prog.stack);
3564 ip->idx = f->code.len;
3565}
3566
Denys Vlasenkoe55a5722018-12-06 12:47:17 +01003567#define bc_parse_updateFunc(p, f) \
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003568 ((p)->func = bc_program_func((p)->fidx = (f)))
Denys Vlasenkoe55a5722018-12-06 12:47:17 +01003569
Denys Vlasenko26819db2018-12-12 16:08:46 +01003570// Called when zbc/zdc_parse_parse() detects a failure,
Denys Vlasenkod38af482018-12-04 19:11:02 +01003571// resets parsing structures.
3572static void bc_parse_reset(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003573{
3574 if (p->fidx != BC_PROG_MAIN) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003575 p->func->nparams = 0;
Denys Vlasenko7d628012018-12-04 21:46:47 +01003576 bc_vec_pop_all(&p->func->code);
3577 bc_vec_pop_all(&p->func->autos);
3578 bc_vec_pop_all(&p->func->labels);
Gavin Howard01055ba2018-11-03 11:00:21 -06003579
3580 bc_parse_updateFunc(p, BC_PROG_MAIN);
3581 }
3582
3583 p->l.i = p->l.len;
3584 p->l.t.t = BC_LEX_EOF;
Gavin Howard01055ba2018-11-03 11:00:21 -06003585
Denys Vlasenko7d628012018-12-04 21:46:47 +01003586 bc_vec_pop_all(&p->exits);
3587 bc_vec_pop_all(&p->conds);
3588 bc_vec_pop_all(&p->ops);
Gavin Howard01055ba2018-11-03 11:00:21 -06003589
Denys Vlasenkod38af482018-12-04 19:11:02 +01003590 bc_program_reset();
Gavin Howard01055ba2018-11-03 11:00:21 -06003591}
3592
3593static void bc_parse_free(BcParse *p)
3594{
Gavin Howard01055ba2018-11-03 11:00:21 -06003595 bc_vec_free(&p->exits);
3596 bc_vec_free(&p->conds);
3597 bc_vec_free(&p->ops);
3598 bc_lex_free(&p->l);
3599}
3600
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003601static void bc_parse_create(BcParse *p, size_t func)
Gavin Howard01055ba2018-11-03 11:00:21 -06003602{
3603 memset(p, 0, sizeof(BcParse));
3604
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003605 bc_lex_init(&p->l);
Denys Vlasenko266aa002018-12-16 23:24:25 +01003606 bc_vec_init(&p->exits, sizeof(size_t), NULL);
Gavin Howard01055ba2018-11-03 11:00:21 -06003607 bc_vec_init(&p->conds, sizeof(size_t), NULL);
Gavin Howard01055ba2018-11-03 11:00:21 -06003608 bc_vec_init(&p->ops, sizeof(BcLexType), NULL);
3609
Gavin Howard01055ba2018-11-03 11:00:21 -06003610 bc_parse_updateFunc(p, func);
3611}
3612
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01003613#if ENABLE_BC
Denys Vlasenkocca79a02018-12-05 21:15:46 +01003614
3615#define BC_PARSE_TOP_OP(p) (*((BcLexType *) bc_vec_top(&(p)->ops)))
3616#define BC_PARSE_LEAF(p, rparen) \
3617 (((p) >= BC_INST_NUM && (p) <= BC_INST_SQRT) || (rparen) || \
3618 (p) == BC_INST_INC_POST || (p) == BC_INST_DEC_POST)
3619
3620// We can calculate the conversion between tokens and exprs by subtracting the
3621// position of the first operator in the lex enum and adding the position of the
3622// first in the expr enum. Note: This only works for binary operators.
Denys Vlasenko0154d782018-12-14 23:32:51 +01003623#define BC_TOKEN_2_INST(t) ((char) ((t) - BC_LEX_NEG + BC_INST_NEG))
Denys Vlasenkocca79a02018-12-05 21:15:46 +01003624
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003625static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags);
3626
3627static BC_STATUS zbc_parse_expr(BcParse *p, uint8_t flags)
3628{
3629 BcStatus s;
3630
3631 s = bc_parse_expr_empty_ok(p, flags);
3632 if (s == BC_STATUS_PARSE_EMPTY_EXP)
3633 RETURN_STATUS(bc_error("empty expression"));
3634 RETURN_STATUS(s);
3635}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003636#define zbc_parse_expr(...) (zbc_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003637
3638static BC_STATUS zbc_parse_stmt_possibly_auto(BcParse *p, bool auto_allowed);
Denys Vlasenkoec603182018-12-17 10:34:02 +01003639#define zbc_parse_stmt_possibly_auto(...) (zbc_parse_stmt_possibly_auto(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01003640
3641static BC_STATUS zbc_parse_stmt(BcParse *p)
3642{
3643 RETURN_STATUS(zbc_parse_stmt_possibly_auto(p, false));
3644}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003645#define zbc_parse_stmt(...) (zbc_parse_stmt(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003646
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003647static BC_STATUS zbc_parse_stmt_allow_NLINE_before(BcParse *p, const char *after_X)
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003648{
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003649 // "if(cond)<newline>stmt" is accepted too, but not 2+ newlines.
3650 // Same for "else", "while()", "for()".
3651 BcStatus s = zbc_lex_next_and_skip_NLINE(&p->l);
3652 if (s) RETURN_STATUS(s);
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003653 if (p->l.t.t == BC_LEX_NLINE)
3654 RETURN_STATUS(bc_error_fmt("no statement after '%s'", after_X));
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003655
3656 RETURN_STATUS(zbc_parse_stmt(p));
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003657}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003658#define zbc_parse_stmt_allow_NLINE_before(...) (zbc_parse_stmt_allow_NLINE_before(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003659
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003660static void bc_parse_operator(BcParse *p, BcLexType type, size_t start,
3661 size_t *nexprs)
Gavin Howard01055ba2018-11-03 11:00:21 -06003662{
Denys Vlasenko65437582018-12-05 19:37:19 +01003663 char l, r = bc_parse_op_PREC(type - BC_LEX_OP_INC);
3664 bool left = bc_parse_op_LEFT(type - BC_LEX_OP_INC);
Gavin Howard01055ba2018-11-03 11:00:21 -06003665
3666 while (p->ops.len > start) {
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003667 BcLexType t = BC_PARSE_TOP_OP(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06003668 if (t == BC_LEX_LPAREN) break;
3669
Denys Vlasenko65437582018-12-05 19:37:19 +01003670 l = bc_parse_op_PREC(t - BC_LEX_OP_INC);
Gavin Howard01055ba2018-11-03 11:00:21 -06003671 if (l >= r && (l != r || !left)) break;
3672
Denys Vlasenko0154d782018-12-14 23:32:51 +01003673 bc_parse_push(p, BC_TOKEN_2_INST(t));
Gavin Howard01055ba2018-11-03 11:00:21 -06003674 bc_vec_pop(&p->ops);
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003675 *nexprs -= (t != BC_LEX_OP_BOOL_NOT && t != BC_LEX_NEG);
Gavin Howard01055ba2018-11-03 11:00:21 -06003676 }
3677
3678 bc_vec_push(&p->ops, &type);
Gavin Howard01055ba2018-11-03 11:00:21 -06003679}
3680
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003681static BC_STATUS zbc_parse_rightParen(BcParse *p, size_t ops_bgn, size_t *nexs)
Gavin Howard01055ba2018-11-03 11:00:21 -06003682{
3683 BcLexType top;
3684
Denys Vlasenko60cf7472018-12-04 20:05:28 +01003685 if (p->ops.len <= ops_bgn)
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003686 RETURN_STATUS(bc_error_bad_expression());
Gavin Howard01055ba2018-11-03 11:00:21 -06003687 top = BC_PARSE_TOP_OP(p);
3688
3689 while (top != BC_LEX_LPAREN) {
Denys Vlasenko0154d782018-12-14 23:32:51 +01003690 bc_parse_push(p, BC_TOKEN_2_INST(top));
Gavin Howard01055ba2018-11-03 11:00:21 -06003691
3692 bc_vec_pop(&p->ops);
3693 *nexs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_NEG;
3694
Denys Vlasenko60cf7472018-12-04 20:05:28 +01003695 if (p->ops.len <= ops_bgn)
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003696 RETURN_STATUS(bc_error_bad_expression());
Gavin Howard01055ba2018-11-03 11:00:21 -06003697 top = BC_PARSE_TOP_OP(p);
3698 }
3699
3700 bc_vec_pop(&p->ops);
3701
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003702 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003703}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003704#define zbc_parse_rightParen(...) (zbc_parse_rightParen(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003705
Denys Vlasenko26819db2018-12-12 16:08:46 +01003706static BC_STATUS zbc_parse_params(BcParse *p, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003707{
3708 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06003709 size_t nparams;
3710
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01003711 dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003712 flags = (flags & ~(BC_PARSE_PRINT | BC_PARSE_REL)) | BC_PARSE_ARRAY;
3713
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003714 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003715 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003716
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003717 nparams = 0;
3718 if (p->l.t.t != BC_LEX_RPAREN) {
3719 for (;;) {
3720 s = zbc_parse_expr(p, flags);
3721 if (s) RETURN_STATUS(s);
3722 nparams++;
3723 if (p->l.t.t != BC_LEX_COMMA) {
3724 if (p->l.t.t == BC_LEX_RPAREN)
3725 break;
3726 RETURN_STATUS(bc_error_bad_token());
3727 }
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003728 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003729 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003730 }
3731 }
3732
Gavin Howard01055ba2018-11-03 11:00:21 -06003733 bc_parse_push(p, BC_INST_CALL);
3734 bc_parse_pushIndex(p, nparams);
3735
Denys Vlasenko26819db2018-12-12 16:08:46 +01003736 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003737}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003738#define zbc_parse_params(...) (zbc_parse_params(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003739
Denys Vlasenko26819db2018-12-12 16:08:46 +01003740static BC_STATUS zbc_parse_call(BcParse *p, char *name, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003741{
3742 BcStatus s;
3743 BcId entry, *entry_ptr;
3744 size_t idx;
3745
3746 entry.name = name;
3747
Denys Vlasenko26819db2018-12-12 16:08:46 +01003748 s = zbc_parse_params(p, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06003749 if (s) goto err;
3750
3751 if (p->l.t.t != BC_LEX_RPAREN) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003752 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003753 goto err;
3754 }
3755
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003756 idx = bc_map_index(&G.prog.fn_map, &entry);
Gavin Howard01055ba2018-11-03 11:00:21 -06003757
3758 if (idx == BC_VEC_INVALID_IDX) {
3759 name = xstrdup(entry.name);
3760 bc_parse_addFunc(p, name, &idx);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003761 idx = bc_map_index(&G.prog.fn_map, &entry);
Gavin Howard01055ba2018-11-03 11:00:21 -06003762 free(entry.name);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003763 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06003764 free(name);
3765
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003766 entry_ptr = bc_vec_item(&G.prog.fn_map, idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003767 bc_parse_pushIndex(p, entry_ptr->idx);
3768
Denys Vlasenko26819db2018-12-12 16:08:46 +01003769 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003770
3771err:
3772 free(name);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003773 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003774}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003775#define zbc_parse_call(...) (zbc_parse_call(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003776
Denys Vlasenko26819db2018-12-12 16:08:46 +01003777static BC_STATUS zbc_parse_name(BcParse *p, BcInst *type, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003778{
3779 BcStatus s;
3780 char *name;
3781
3782 name = xstrdup(p->l.t.v.v);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003783 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003784 if (s) goto err;
3785
3786 if (p->l.t.t == BC_LEX_LBRACKET) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003787 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003788 if (s) goto err;
3789
3790 if (p->l.t.t == BC_LEX_RBRACKET) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003791 if (!(flags & BC_PARSE_ARRAY)) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003792 s = bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06003793 goto err;
3794 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003795 *type = BC_INST_ARRAY;
Denys Vlasenko26819db2018-12-12 16:08:46 +01003796 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003797 *type = BC_INST_ARRAY_ELEM;
Gavin Howard01055ba2018-11-03 11:00:21 -06003798 flags &= ~(BC_PARSE_PRINT | BC_PARSE_REL);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003799 s = zbc_parse_expr(p, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06003800 if (s) goto err;
3801 }
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003802 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003803 if (s) goto err;
3804 bc_parse_push(p, *type);
3805 bc_parse_pushName(p, name);
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01003806 free(name);
Gavin Howard01055ba2018-11-03 11:00:21 -06003807 }
3808 else if (p->l.t.t == BC_LEX_LPAREN) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003809 if (flags & BC_PARSE_NOCALL) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003810 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003811 goto err;
3812 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003813 *type = BC_INST_CALL;
Denys Vlasenko26819db2018-12-12 16:08:46 +01003814 s = zbc_parse_call(p, name, flags);
3815 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003816 *type = BC_INST_VAR;
3817 bc_parse_push(p, BC_INST_VAR);
3818 bc_parse_pushName(p, name);
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01003819 free(name);
Gavin Howard01055ba2018-11-03 11:00:21 -06003820 }
3821
Denys Vlasenko26819db2018-12-12 16:08:46 +01003822 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003823
3824err:
3825 free(name);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003826 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003827}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003828#define zbc_parse_name(...) (zbc_parse_name(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003829
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003830static BC_STATUS zbc_parse_read(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003831{
3832 BcStatus s;
3833
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003834 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003835 if (s) RETURN_STATUS(s);
3836 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003837
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003838 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003839 if (s) RETURN_STATUS(s);
3840 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003841
3842 bc_parse_push(p, BC_INST_READ);
3843
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003844 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003845}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003846#define zbc_parse_read(...) (zbc_parse_read(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003847
Denys Vlasenko26819db2018-12-12 16:08:46 +01003848static BC_STATUS zbc_parse_builtin(BcParse *p, BcLexType type, uint8_t flags,
Gavin Howard01055ba2018-11-03 11:00:21 -06003849 BcInst *prev)
3850{
3851 BcStatus s;
3852
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003853 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003854 if (s) RETURN_STATUS(s);
3855 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003856
3857 flags = (flags & ~(BC_PARSE_PRINT | BC_PARSE_REL)) | BC_PARSE_ARRAY;
3858
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003859 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003860 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003861
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003862 s = zbc_parse_expr(p, flags);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003863 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003864
Denys Vlasenko26819db2018-12-12 16:08:46 +01003865 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003866
3867 *prev = (type == BC_LEX_KEY_LENGTH) ? BC_INST_LENGTH : BC_INST_SQRT;
3868 bc_parse_push(p, *prev);
3869
Denys Vlasenko26819db2018-12-12 16:08:46 +01003870 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003871}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003872#define zbc_parse_builtin(...) (zbc_parse_builtin(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003873
Denys Vlasenko26819db2018-12-12 16:08:46 +01003874static BC_STATUS zbc_parse_scale(BcParse *p, BcInst *type, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003875{
3876 BcStatus s;
3877
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003878 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003879 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003880
3881 if (p->l.t.t != BC_LEX_LPAREN) {
3882 *type = BC_INST_SCALE;
3883 bc_parse_push(p, BC_INST_SCALE);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003884 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003885 }
3886
3887 *type = BC_INST_SCALE_FUNC;
3888 flags &= ~(BC_PARSE_PRINT | BC_PARSE_REL);
3889
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003890 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003891 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003892
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003893 s = zbc_parse_expr(p, flags);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003894 if (s) RETURN_STATUS(s);
3895 if (p->l.t.t != BC_LEX_RPAREN)
3896 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003897 bc_parse_push(p, BC_INST_SCALE_FUNC);
3898
Denys Vlasenko26819db2018-12-12 16:08:46 +01003899 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003900}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003901#define zbc_parse_scale(...) (zbc_parse_scale(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003902
Denys Vlasenko26819db2018-12-12 16:08:46 +01003903static BC_STATUS zbc_parse_incdec(BcParse *p, BcInst *prev, bool *paren_expr,
Gavin Howard01055ba2018-11-03 11:00:21 -06003904 size_t *nexprs, uint8_t flags)
3905{
3906 BcStatus s;
3907 BcLexType type;
3908 char inst;
3909 BcInst etype = *prev;
3910
3911 if (etype == BC_INST_VAR || etype == BC_INST_ARRAY_ELEM ||
3912 etype == BC_INST_SCALE || etype == BC_INST_LAST ||
3913 etype == BC_INST_IBASE || etype == BC_INST_OBASE)
3914 {
3915 *prev = inst = BC_INST_INC_POST + (p->l.t.t != BC_LEX_OP_INC);
3916 bc_parse_push(p, inst);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003917 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003918 }
3919 else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003920 *prev = inst = BC_INST_INC_PRE + (p->l.t.t != BC_LEX_OP_INC);
3921 *paren_expr = true;
3922
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003923 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003924 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003925 type = p->l.t.t;
3926
3927 // Because we parse the next part of the expression
3928 // right here, we need to increment this.
3929 *nexprs = *nexprs + 1;
3930
3931 switch (type) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003932 case BC_LEX_NAME:
Denys Vlasenko26819db2018-12-12 16:08:46 +01003933 s = zbc_parse_name(p, prev, flags | BC_PARSE_NOCALL);
Gavin Howard01055ba2018-11-03 11:00:21 -06003934 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003935 case BC_LEX_KEY_IBASE:
3936 case BC_LEX_KEY_LAST:
3937 case BC_LEX_KEY_OBASE:
Gavin Howard01055ba2018-11-03 11:00:21 -06003938 bc_parse_push(p, type - BC_LEX_KEY_IBASE + BC_INST_IBASE);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003939 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003940 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003941 case BC_LEX_KEY_SCALE:
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003942 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003943 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003944 if (p->l.t.t == BC_LEX_LPAREN)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003945 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003946 else
3947 bc_parse_push(p, BC_INST_SCALE);
3948 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003949 default:
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003950 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003951 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003952 }
3953
3954 if (!s) bc_parse_push(p, inst);
3955 }
3956
Denys Vlasenko26819db2018-12-12 16:08:46 +01003957 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003958}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003959#define zbc_parse_incdec(...) (zbc_parse_incdec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003960
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003961static BC_STATUS zbc_parse_minus(BcParse *p, BcInst *prev, size_t ops_bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06003962 bool rparen, size_t *nexprs)
3963{
3964 BcStatus s;
3965 BcLexType type;
3966 BcInst etype = *prev;
3967
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003968 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003969 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003970
3971 type = rparen || etype == BC_INST_INC_POST || etype == BC_INST_DEC_POST ||
3972 (etype >= BC_INST_NUM && etype <= BC_INST_SQRT) ?
3973 BC_LEX_OP_MINUS :
3974 BC_LEX_NEG;
Denys Vlasenko0154d782018-12-14 23:32:51 +01003975 *prev = BC_TOKEN_2_INST(type);
Gavin Howard01055ba2018-11-03 11:00:21 -06003976
3977 // We can just push onto the op stack because this is the largest
3978 // precedence operator that gets pushed. Inc/dec does not.
3979 if (type != BC_LEX_OP_MINUS)
3980 bc_vec_push(&p->ops, &type);
3981 else
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003982 bc_parse_operator(p, type, ops_bgn, nexprs);
Gavin Howard01055ba2018-11-03 11:00:21 -06003983
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003984 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003985}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003986#define zbc_parse_minus(...) (zbc_parse_minus(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003987
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003988static BC_STATUS zbc_parse_string(BcParse *p, char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06003989{
3990 char *str = xstrdup(p->l.t.v.v);
3991
3992 bc_parse_push(p, BC_INST_STR);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003993 bc_parse_pushIndex(p, G.prog.strs.len);
3994 bc_vec_push(&G.prog.strs, &str);
Gavin Howard01055ba2018-11-03 11:00:21 -06003995 bc_parse_push(p, inst);
3996
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003997 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003998}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003999#define zbc_parse_string(...) (zbc_parse_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004000
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004001static BC_STATUS zbc_parse_print(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004002{
4003 BcStatus s;
4004 BcLexType type;
Gavin Howard01055ba2018-11-03 11:00:21 -06004005
Denys Vlasenko5d18f6b2018-12-16 21:08:30 +01004006 for (;;) {
4007 s = zbc_lex_next(&p->l);
4008 if (s) RETURN_STATUS(s);
4009 type = p->l.t.t;
Denys Vlasenkoebc41c92018-12-08 23:36:28 +01004010 if (type == BC_LEX_STR) {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004011 s = zbc_parse_string(p, BC_INST_PRINT_POP);
Denys Vlasenkoebc41c92018-12-08 23:36:28 +01004012 } else {
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004013 s = zbc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004014 bc_parse_push(p, BC_INST_PRINT_POP);
4015 }
Denys Vlasenko5d18f6b2018-12-16 21:08:30 +01004016 if (s) RETURN_STATUS(s);
4017 if (p->l.t.t != BC_LEX_COMMA)
4018 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004019 }
4020
Denys Vlasenko5d18f6b2018-12-16 21:08:30 +01004021 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004022}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004023#define zbc_parse_print(...) (zbc_parse_print(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004024
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004025static BC_STATUS zbc_parse_return(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004026{
4027 BcStatus s;
4028 BcLexType t;
Gavin Howard01055ba2018-11-03 11:00:21 -06004029
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004030 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004031 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004032 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004033
4034 t = p->l.t.t;
Gavin Howard01055ba2018-11-03 11:00:21 -06004035 if (t == BC_LEX_NLINE || t == BC_LEX_SCOLON)
4036 bc_parse_push(p, BC_INST_RET0);
4037 else {
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004038 bool paren = (t == BC_LEX_LPAREN);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004039 s = bc_parse_expr_empty_ok(p, 0);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004040 if (s == BC_STATUS_PARSE_EMPTY_EXP) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004041 bc_parse_push(p, BC_INST_RET0);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004042 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004043 }
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004044 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004045
4046 if (!paren || p->l.t.last != BC_LEX_RPAREN) {
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01004047 s = bc_POSIX_requires("parentheses around return expressions");
Denys Vlasenkoec603182018-12-17 10:34:02 +01004048 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06004049 }
4050
4051 bc_parse_push(p, BC_INST_RET);
4052 }
4053
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004054 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004055 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004056}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004057#define zbc_parse_return(...) (zbc_parse_return(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004058
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004059static void rewrite_label_to_current(BcParse *p, size_t idx)
4060{
4061 size_t *label = bc_vec_item(&p->func->labels, idx);
4062 *label = p->func->code.len;
4063}
4064
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004065static BC_STATUS zbc_parse_if(BcParse *p)
4066{
4067 BcStatus s;
Denys Vlasenko15850832018-12-16 21:40:54 +01004068 size_t ip_idx;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004069
4070 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
4071 s = zbc_lex_next(&p->l);
4072 if (s) RETURN_STATUS(s);
4073 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
4074
4075 s = zbc_lex_next(&p->l);
4076 if (s) RETURN_STATUS(s);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004077 s = zbc_parse_expr(p, BC_PARSE_REL);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004078 if (s) RETURN_STATUS(s);
4079
4080 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004081
Denys Vlasenko15850832018-12-16 21:40:54 +01004082 ip_idx = p->func->labels.len;
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004083 bc_parse_pushJUMP_ZERO(p, ip_idx);
Denys Vlasenko15850832018-12-16 21:40:54 +01004084 bc_vec_push(&p->func->labels, &ip_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004085
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004086 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_if);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004087 if (s) RETURN_STATUS(s);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004088
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004089 dbg_lex("%s:%d in if after stmt: p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
4090 if (p->l.t.t == BC_LEX_KEY_ELSE) {
Denys Vlasenko15850832018-12-16 21:40:54 +01004091 size_t ip2_idx;
Denys Vlasenko74156332018-12-16 21:21:27 +01004092
Denys Vlasenko15850832018-12-16 21:40:54 +01004093 ip2_idx = p->func->labels.len;
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004094
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004095 dbg_lex("%s:%d after if() body: BC_INST_JUMP to %zd", __func__, __LINE__, ip2_idx);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004096 bc_parse_pushJUMP(p, ip2_idx);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004097
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004098 dbg_lex("%s:%d rewriting 'if_zero' label to jump to 'else'-> %zd", __func__, __LINE__, p->func->code.len);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004099 rewrite_label_to_current(p, ip_idx);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004100
Denys Vlasenko15850832018-12-16 21:40:54 +01004101 bc_vec_push(&p->func->labels, &ip2_idx);
4102 ip_idx = ip2_idx;
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004103
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004104 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_else);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004105 if (s) RETURN_STATUS(s);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004106 }
4107
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004108 dbg_lex("%s:%d rewriting label to jump after 'if' body-> %zd", __func__, __LINE__, p->func->code.len);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004109 rewrite_label_to_current(p, ip_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004110
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004111 dbg_lex_done("%s:%d done", __func__, __LINE__);
4112 RETURN_STATUS(s);
4113}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004114#define zbc_parse_if(...) (zbc_parse_if(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004115
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004116static BC_STATUS zbc_parse_while(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004117{
4118 BcStatus s;
Denys Vlasenkode24e9d2018-12-16 23:02:22 +01004119 size_t cond_idx;
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004120 size_t ip_idx;
Gavin Howard01055ba2018-11-03 11:00:21 -06004121
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004122 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004123 if (s) RETURN_STATUS(s);
4124 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004125 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004126 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004127
Denys Vlasenkode24e9d2018-12-16 23:02:22 +01004128 cond_idx = p->func->labels.len;
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004129 ip_idx = cond_idx + 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06004130
4131 bc_vec_push(&p->func->labels, &p->func->code.len);
Denys Vlasenkode24e9d2018-12-16 23:02:22 +01004132 bc_vec_push(&p->conds, &cond_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004133
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004134 bc_vec_push(&p->exits, &ip_idx);
4135 bc_vec_push(&p->func->labels, &ip_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004136
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004137 s = zbc_parse_expr(p, BC_PARSE_REL);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004138 if (s) RETURN_STATUS(s);
4139 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko202dd192018-12-16 17:30:35 +01004140
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004141 bc_parse_pushJUMP_ZERO(p, ip_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004142
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004143 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_while);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004144 if (s) RETURN_STATUS(s);
4145
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004146 dbg_lex("%s:%d BC_INST_JUMP to %zd", __func__, __LINE__, cond_idx);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004147 bc_parse_pushJUMP(p, cond_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004148
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004149 dbg_lex("%s:%d rewriting label-> %zd", __func__, __LINE__, p->func->code.len);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004150 rewrite_label_to_current(p, ip_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004151
4152 bc_vec_pop(&p->exits);
4153 bc_vec_pop(&p->conds);
4154
4155 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004156}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004157#define zbc_parse_while(...) (zbc_parse_while(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004158
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004159static BC_STATUS zbc_parse_for(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004160{
4161 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06004162 size_t cond_idx, exit_idx, body_idx, update_idx;
4163
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004164 dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004165 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004166 if (s) RETURN_STATUS(s);
4167 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004168 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004169 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004170
4171 if (p->l.t.t != BC_LEX_SCOLON)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004172 s = zbc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004173 else
Denys Vlasenko00646792018-12-05 18:12:27 +01004174 s = bc_POSIX_does_not_allow_empty_X_expression_in_for("init");
Gavin Howard01055ba2018-11-03 11:00:21 -06004175
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004176 if (s) RETURN_STATUS(s);
4177 if (p->l.t.t != BC_LEX_SCOLON) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004178 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004179 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004180
4181 cond_idx = p->func->labels.len;
4182 update_idx = cond_idx + 1;
4183 body_idx = update_idx + 1;
4184 exit_idx = body_idx + 1;
4185
4186 bc_vec_push(&p->func->labels, &p->func->code.len);
4187
4188 if (p->l.t.t != BC_LEX_SCOLON)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004189 s = zbc_parse_expr(p, BC_PARSE_REL);
Gavin Howard01055ba2018-11-03 11:00:21 -06004190 else
Denys Vlasenko00646792018-12-05 18:12:27 +01004191 s = bc_POSIX_does_not_allow_empty_X_expression_in_for("condition");
Gavin Howard01055ba2018-11-03 11:00:21 -06004192
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004193 if (s) RETURN_STATUS(s);
4194 if (p->l.t.t != BC_LEX_SCOLON) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004195
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004196 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004197 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004198
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004199 bc_parse_pushJUMP_ZERO(p, exit_idx);
4200 bc_parse_pushJUMP(p, body_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004201
Gavin Howard01055ba2018-11-03 11:00:21 -06004202 bc_vec_push(&p->conds, &update_idx);
4203 bc_vec_push(&p->func->labels, &p->func->code.len);
4204
4205 if (p->l.t.t != BC_LEX_RPAREN)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004206 s = zbc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004207 else
Denys Vlasenko00646792018-12-05 18:12:27 +01004208 s = bc_POSIX_does_not_allow_empty_X_expression_in_for("update");
Gavin Howard01055ba2018-11-03 11:00:21 -06004209
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004210 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004211
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004212 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004213 bc_parse_pushJUMP(p, cond_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004214 bc_vec_push(&p->func->labels, &p->func->code.len);
4215
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004216 bc_vec_push(&p->exits, &exit_idx);
4217 bc_vec_push(&p->func->labels, &exit_idx);
Denys Vlasenko202dd192018-12-16 17:30:35 +01004218
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004219 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_for);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004220 if (s) RETURN_STATUS(s);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004221
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004222 dbg_lex("%s:%d BC_INST_JUMP to %zd", __func__, __LINE__, update_idx);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004223 bc_parse_pushJUMP(p, update_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004224
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004225 dbg_lex("%s:%d rewriting label-> %zd", __func__, __LINE__, p->func->code.len);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004226 rewrite_label_to_current(p, exit_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004227
4228 bc_vec_pop(&p->exits);
4229 bc_vec_pop(&p->conds);
Gavin Howard01055ba2018-11-03 11:00:21 -06004230
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004231 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06004232}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004233#define zbc_parse_for(...) (zbc_parse_for(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004234
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004235static BC_STATUS zbc_parse_break_or_continue(BcParse *p, BcLexType type)
Gavin Howard01055ba2018-11-03 11:00:21 -06004236{
4237 BcStatus s;
4238 size_t i;
Gavin Howard01055ba2018-11-03 11:00:21 -06004239
Gavin Howard01055ba2018-11-03 11:00:21 -06004240 if (type == BC_LEX_KEY_BREAK) {
Denys Vlasenko8e7686e2018-12-16 23:18:28 +01004241 if (p->exits.len == 0) // none of the enclosing blocks is a loop
4242 RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko266aa002018-12-16 23:24:25 +01004243 i = *(size_t*)bc_vec_top(&p->exits);
Denys Vlasenko8e7686e2018-12-16 23:18:28 +01004244 } else {
Denys Vlasenko266aa002018-12-16 23:24:25 +01004245 i = *(size_t*)bc_vec_top(&p->conds);
Denys Vlasenko8e7686e2018-12-16 23:18:28 +01004246 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004247
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004248 bc_parse_pushJUMP(p, i);
Gavin Howard01055ba2018-11-03 11:00:21 -06004249
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004250 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004251 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004252
4253 if (p->l.t.t != BC_LEX_SCOLON && p->l.t.t != BC_LEX_NLINE)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004254 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004255
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004256 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004257}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004258#define zbc_parse_break_or_continue(...) (zbc_parse_break_or_continue(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004259
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004260static BC_STATUS zbc_parse_funcdef(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004261{
4262 BcStatus s;
4263 bool var, comma = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06004264 char *name;
4265
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004266 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004267 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004268 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004269 if (p->l.t.t != BC_LEX_NAME)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004270 RETURN_STATUS(bc_error("bad function definition"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004271
4272 name = xstrdup(p->l.t.v.v);
4273 bc_parse_addFunc(p, name, &p->fidx);
4274
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004275 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004276 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004277 if (p->l.t.t != BC_LEX_LPAREN)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004278 RETURN_STATUS(bc_error("bad function definition"));
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004279 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004280 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004281
4282 while (p->l.t.t != BC_LEX_RPAREN) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004283 if (p->l.t.t != BC_LEX_NAME)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004284 RETURN_STATUS(bc_error("bad function definition"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004285
4286 ++p->func->nparams;
4287
4288 name = xstrdup(p->l.t.v.v);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004289 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004290 if (s) goto err;
4291
4292 var = p->l.t.t != BC_LEX_LBRACKET;
4293
4294 if (!var) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004295 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004296 if (s) goto err;
4297
4298 if (p->l.t.t != BC_LEX_RBRACKET) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004299 s = bc_error("bad function definition");
Gavin Howard01055ba2018-11-03 11:00:21 -06004300 goto err;
4301 }
4302
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004303 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004304 if (s) goto err;
4305 }
4306
4307 comma = p->l.t.t == BC_LEX_COMMA;
4308 if (comma) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004309 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004310 if (s) goto err;
4311 }
4312
Denys Vlasenko29301232018-12-11 15:29:32 +01004313 s = zbc_func_insert(p->func, name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06004314 if (s) goto err;
4315 }
4316
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004317 if (comma) RETURN_STATUS(bc_error("bad function definition"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004318
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004319 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004320 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004321
4322 if (p->l.t.t != BC_LEX_LBRACE)
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01004323 s = bc_POSIX_requires("the left brace be on the same line as the function header");
Gavin Howard01055ba2018-11-03 11:00:21 -06004324
Denys Vlasenko202dd192018-12-16 17:30:35 +01004325 // Prevent "define z()<newline>" from being interpreted as function with empty stmt as body
4326 s = zbc_lex_skip_if_at_NLINE(&p->l);
4327 if (s) RETURN_STATUS(s);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004328 //GNU bc requires a {} block even if function body has single stmt, enforce this?
4329 if (p->l.t.t != BC_LEX_LBRACE)
4330 RETURN_STATUS(bc_error("function { body } expected"));
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004331
4332 p->in_funcdef++; // to determine whether "return" stmt is allowed, and such
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004333 s = zbc_parse_stmt_possibly_auto(p, true);
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004334 p->in_funcdef--;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004335 if (s) RETURN_STATUS(s);
4336
4337 bc_parse_push(p, BC_INST_RET0);
4338 bc_parse_updateFunc(p, BC_PROG_MAIN);
4339
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004340 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004341 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004342
4343err:
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004344 dbg_lex_done("%s:%d done (error)", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004345 free(name);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004346 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004347}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004348#define zbc_parse_funcdef(...) (zbc_parse_funcdef(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004349
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004350static BC_STATUS zbc_parse_auto(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004351{
4352 BcStatus s;
4353 bool comma, var, one;
4354 char *name;
4355
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004356 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004357 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004358 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004359
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004360 comma = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06004361 one = p->l.t.t == BC_LEX_NAME;
4362
4363 while (p->l.t.t == BC_LEX_NAME) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004364 name = xstrdup(p->l.t.v.v);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004365 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004366 if (s) goto err;
4367
4368 var = p->l.t.t != BC_LEX_LBRACKET;
4369 if (!var) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004370 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004371 if (s) goto err;
4372
4373 if (p->l.t.t != BC_LEX_RBRACKET) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004374 s = bc_error("bad function definition");
Gavin Howard01055ba2018-11-03 11:00:21 -06004375 goto err;
4376 }
4377
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004378 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004379 if (s) goto err;
4380 }
4381
4382 comma = p->l.t.t == BC_LEX_COMMA;
4383 if (comma) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004384 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004385 if (s) goto err;
4386 }
4387
Denys Vlasenko29301232018-12-11 15:29:32 +01004388 s = zbc_func_insert(p->func, name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06004389 if (s) goto err;
4390 }
4391
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004392 if (comma) RETURN_STATUS(bc_error("bad function definition"));
4393 if (!one) RETURN_STATUS(bc_error("no auto variable found"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004394
4395 if (p->l.t.t != BC_LEX_NLINE && p->l.t.t != BC_LEX_SCOLON)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004396 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004397
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004398 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004399 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004400
4401err:
4402 free(name);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004403 dbg_lex_done("%s:%d done (ERROR)", __func__, __LINE__);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004404 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004405}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004406#define zbc_parse_auto(...) (zbc_parse_auto(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004407
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004408#undef zbc_parse_stmt_possibly_auto
4409static BC_STATUS zbc_parse_stmt_possibly_auto(BcParse *p, bool auto_allowed)
Gavin Howard01055ba2018-11-03 11:00:21 -06004410{
4411 BcStatus s = BC_STATUS_SUCCESS;
4412
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004413 dbg_lex_enter("%s:%d entered, p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06004414
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004415 if (p->l.t.t == BC_LEX_NLINE) {
4416 dbg_lex_done("%s:%d done (seen BC_LEX_NLINE)", __func__, __LINE__);
4417 RETURN_STATUS(zbc_lex_next(&p->l));
4418 }
4419 if (p->l.t.t == BC_LEX_SCOLON) {
4420 dbg_lex_done("%s:%d done (seen BC_LEX_SCOLON)", __func__, __LINE__);
4421 RETURN_STATUS(zbc_lex_next(&p->l));
4422 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004423
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004424 if (p->l.t.t == BC_LEX_LBRACE) {
4425 dbg_lex("%s:%d BC_LEX_LBRACE: (auto_allowed:%d)", __func__, __LINE__, auto_allowed);
4426 do {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004427 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004428 if (s) RETURN_STATUS(s);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004429 } while (p->l.t.t == BC_LEX_NLINE);
4430 if (auto_allowed && p->l.t.t == BC_LEX_KEY_AUTO) {
4431 dbg_lex("%s:%d calling zbc_parse_auto()", __func__, __LINE__);
4432 s = zbc_parse_auto(p);
4433 if (s) RETURN_STATUS(s);
4434 }
4435 while (p->l.t.t != BC_LEX_RBRACE) {
4436 dbg_lex("%s:%d block parsing loop", __func__, __LINE__);
4437 s = zbc_parse_stmt(p);
4438 if (s) RETURN_STATUS(s);
4439 }
4440 s = zbc_lex_next(&p->l);
4441 dbg_lex_done("%s:%d done (seen BC_LEX_RBRACE)", __func__, __LINE__);
4442 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004443 }
4444
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004445 dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06004446 switch (p->l.t.t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004447 case BC_LEX_OP_INC:
4448 case BC_LEX_OP_DEC:
4449 case BC_LEX_OP_MINUS:
4450 case BC_LEX_OP_BOOL_NOT:
4451 case BC_LEX_LPAREN:
4452 case BC_LEX_NAME:
4453 case BC_LEX_NUMBER:
4454 case BC_LEX_KEY_IBASE:
4455 case BC_LEX_KEY_LAST:
4456 case BC_LEX_KEY_LENGTH:
4457 case BC_LEX_KEY_OBASE:
4458 case BC_LEX_KEY_READ:
4459 case BC_LEX_KEY_SCALE:
4460 case BC_LEX_KEY_SQRT:
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004461 s = zbc_parse_expr(p, BC_PARSE_PRINT);
Gavin Howard01055ba2018-11-03 11:00:21 -06004462 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004463 case BC_LEX_STR:
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004464 s = zbc_parse_string(p, BC_INST_PRINT_STR);
Gavin Howard01055ba2018-11-03 11:00:21 -06004465 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004466 case BC_LEX_KEY_BREAK:
4467 case BC_LEX_KEY_CONTINUE:
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004468 s = zbc_parse_break_or_continue(p, p->l.t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06004469 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004470 case BC_LEX_KEY_FOR:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004471 s = zbc_parse_for(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004472 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004473 case BC_LEX_KEY_HALT:
Gavin Howard01055ba2018-11-03 11:00:21 -06004474 bc_parse_push(p, BC_INST_HALT);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004475 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004476 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004477 case BC_LEX_KEY_IF:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004478 s = zbc_parse_if(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004479 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004480 case BC_LEX_KEY_LIMITS:
Denys Vlasenkocfdc1332018-12-03 14:02:35 +01004481 // "limits" is a compile-time command,
4482 // the output is produced at _parse time_.
Denys Vlasenko64074a12018-12-07 15:50:14 +01004483 printf(
4484 "BC_BASE_MAX = "BC_MAX_OBASE_STR "\n"
4485 "BC_DIM_MAX = "BC_MAX_DIM_STR "\n"
4486 "BC_SCALE_MAX = "BC_MAX_SCALE_STR "\n"
4487 "BC_STRING_MAX = "BC_MAX_STRING_STR"\n"
4488 "BC_NAME_MAX = "BC_MAX_NAME_STR "\n"
4489 "BC_NUM_MAX = "BC_MAX_NUM_STR "\n"
4490 "MAX Exponent = "BC_MAX_EXP_STR "\n"
4491 "Number of vars = "BC_MAX_VARS_STR "\n"
4492 );
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004493 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004494 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004495 case BC_LEX_KEY_PRINT:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004496 s = zbc_parse_print(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004497 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004498 case BC_LEX_KEY_QUIT:
Denys Vlasenkocfdc1332018-12-03 14:02:35 +01004499 // "quit" is a compile-time command. For example,
4500 // "if (0 == 1) quit" terminates when parsing the statement,
4501 // not when it is executed
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01004502 QUIT_OR_RETURN_TO_MAIN;
Gavin Howard01055ba2018-11-03 11:00:21 -06004503 case BC_LEX_KEY_RETURN:
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004504 if (!p->in_funcdef)
4505 RETURN_STATUS(bc_error("'return' not in a function"));
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004506 s = zbc_parse_return(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004507 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004508 case BC_LEX_KEY_WHILE:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004509 s = zbc_parse_while(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004510 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004511 default:
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004512 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06004513 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004514 }
4515
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004516 if (s || G_interrupt) {
4517 bc_parse_reset(p);
4518 s = BC_STATUS_FAILURE;
4519 }
4520
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004521 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004522 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004523}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004524#define zbc_parse_stmt_possibly_auto(...) (zbc_parse_stmt_possibly_auto(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004525
Denys Vlasenko99b37622018-12-15 20:06:59 +01004526static BC_STATUS zbc_parse_stmt_or_funcdef(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004527{
4528 BcStatus s;
4529
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004530 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004531 if (p->l.t.t == BC_LEX_EOF)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004532 s = bc_error("end of file");
Gavin Howard01055ba2018-11-03 11:00:21 -06004533 else if (p->l.t.t == BC_LEX_KEY_DEFINE) {
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004534 dbg_lex("%s:%d p->l.t.t:BC_LEX_KEY_DEFINE", __func__, __LINE__);
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004535 s = zbc_parse_funcdef(p);
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004536 } else {
4537 dbg_lex("%s:%d p->l.t.t:%d (not BC_LEX_KEY_DEFINE)", __func__, __LINE__, p->l.t.t);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004538 s = zbc_parse_stmt(p);
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004539 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004540
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004541 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenko26819db2018-12-12 16:08:46 +01004542 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004543}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004544#define zbc_parse_stmt_or_funcdef(...) (zbc_parse_stmt_or_funcdef(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004545
Denys Vlasenkob402ff82018-12-11 15:45:15 +01004546// This is not a "z" function: can also return BC_STATUS_PARSE_EMPTY_EXP
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004547static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06004548{
4549 BcStatus s = BC_STATUS_SUCCESS;
4550 BcInst prev = BC_INST_PRINT;
4551 BcLexType top, t = p->l.t.t;
4552 size_t nexprs = 0, ops_bgn = p->ops.len;
Denys Vlasenko18c6b542018-12-07 12:57:32 +01004553 unsigned nparens, nrelops;
Gavin Howard01055ba2018-11-03 11:00:21 -06004554 bool paren_first, paren_expr, rprn, done, get_token, assign, bin_last;
4555
Denys Vlasenko17df8822018-12-14 23:00:24 +01004556 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004557 paren_first = p->l.t.t == BC_LEX_LPAREN;
4558 nparens = nrelops = 0;
4559 paren_expr = rprn = done = get_token = assign = false;
4560 bin_last = true;
4561
Denys Vlasenkobcb62a72018-12-05 20:17:48 +01004562 for (; !G_interrupt && !s && !done && bc_parse_exprs(t); t = p->l.t.t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004563 switch (t) {
4564
4565 case BC_LEX_OP_INC:
4566 case BC_LEX_OP_DEC:
4567 {
Denys Vlasenko26819db2018-12-12 16:08:46 +01004568 s = zbc_parse_incdec(p, &prev, &paren_expr, &nexprs, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06004569 rprn = get_token = bin_last = false;
4570 break;
4571 }
4572
4573 case BC_LEX_OP_MINUS:
4574 {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004575 s = zbc_parse_minus(p, &prev, ops_bgn, rprn, &nexprs);
Gavin Howard01055ba2018-11-03 11:00:21 -06004576 rprn = get_token = false;
4577 bin_last = prev == BC_INST_MINUS;
4578 break;
4579 }
4580
4581 case BC_LEX_OP_ASSIGN_POWER:
4582 case BC_LEX_OP_ASSIGN_MULTIPLY:
4583 case BC_LEX_OP_ASSIGN_DIVIDE:
4584 case BC_LEX_OP_ASSIGN_MODULUS:
4585 case BC_LEX_OP_ASSIGN_PLUS:
4586 case BC_LEX_OP_ASSIGN_MINUS:
4587 case BC_LEX_OP_ASSIGN:
4588 {
4589 if (prev != BC_INST_VAR && prev != BC_INST_ARRAY_ELEM &&
4590 prev != BC_INST_SCALE && prev != BC_INST_IBASE &&
4591 prev != BC_INST_OBASE && prev != BC_INST_LAST)
4592 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004593 s = bc_error("bad assignment:"
Denys Vlasenko0154d782018-12-14 23:32:51 +01004594 " left side must be variable"
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004595 " or array element"
Denys Vlasenko0154d782018-12-14 23:32:51 +01004596 ); // note: shared string
Gavin Howard01055ba2018-11-03 11:00:21 -06004597 break;
4598 }
4599 }
4600 // Fallthrough.
4601 case BC_LEX_OP_POWER:
4602 case BC_LEX_OP_MULTIPLY:
4603 case BC_LEX_OP_DIVIDE:
4604 case BC_LEX_OP_MODULUS:
4605 case BC_LEX_OP_PLUS:
4606 case BC_LEX_OP_REL_EQ:
4607 case BC_LEX_OP_REL_LE:
4608 case BC_LEX_OP_REL_GE:
4609 case BC_LEX_OP_REL_NE:
4610 case BC_LEX_OP_REL_LT:
4611 case BC_LEX_OP_REL_GT:
4612 case BC_LEX_OP_BOOL_NOT:
4613 case BC_LEX_OP_BOOL_OR:
4614 case BC_LEX_OP_BOOL_AND:
4615 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004616 if (((t == BC_LEX_OP_BOOL_NOT) != bin_last)
4617 || (t != BC_LEX_OP_BOOL_NOT && prev == BC_INST_BOOL_NOT)
4618 ) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004619 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004620 }
4621
4622 nrelops += t >= BC_LEX_OP_REL_EQ && t <= BC_LEX_OP_REL_GT;
Denys Vlasenko0154d782018-12-14 23:32:51 +01004623 prev = BC_TOKEN_2_INST(t);
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01004624 bc_parse_operator(p, t, ops_bgn, &nexprs);
4625 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004626 rprn = get_token = false;
4627 bin_last = t != BC_LEX_OP_BOOL_NOT;
4628
4629 break;
4630 }
4631
4632 case BC_LEX_LPAREN:
4633 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004634 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004635 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004636 ++nparens;
4637 paren_expr = rprn = bin_last = false;
4638 get_token = true;
4639 bc_vec_push(&p->ops, &t);
4640
4641 break;
4642 }
4643
4644 case BC_LEX_RPAREN:
4645 {
4646 if (bin_last || prev == BC_INST_BOOL_NOT)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004647 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004648
4649 if (nparens == 0) {
4650 s = BC_STATUS_SUCCESS;
4651 done = true;
4652 get_token = false;
4653 break;
4654 }
Denys Vlasenko17df8822018-12-14 23:00:24 +01004655 else if (!paren_expr) {
4656 dbg_lex_done("%s:%d done (returning EMPTY_EXP)", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004657 return BC_STATUS_PARSE_EMPTY_EXP;
Denys Vlasenko17df8822018-12-14 23:00:24 +01004658 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004659
4660 --nparens;
4661 paren_expr = rprn = true;
4662 get_token = bin_last = false;
4663
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004664 s = zbc_parse_rightParen(p, ops_bgn, &nexprs);
Gavin Howard01055ba2018-11-03 11:00:21 -06004665
4666 break;
4667 }
4668
4669 case BC_LEX_NAME:
4670 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004671 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004672 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004673 paren_expr = true;
4674 rprn = get_token = bin_last = false;
Denys Vlasenko26819db2018-12-12 16:08:46 +01004675 s = zbc_parse_name(p, &prev, flags & ~BC_PARSE_NOCALL);
Gavin Howard01055ba2018-11-03 11:00:21 -06004676 ++nexprs;
4677
4678 break;
4679 }
4680
4681 case BC_LEX_NUMBER:
4682 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004683 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004684 return bc_error_bad_expression();
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01004685 bc_parse_number(p);
4686 nexprs++;
4687 prev = BC_INST_NUM;
Gavin Howard01055ba2018-11-03 11:00:21 -06004688 paren_expr = get_token = true;
4689 rprn = bin_last = false;
4690
4691 break;
4692 }
4693
4694 case BC_LEX_KEY_IBASE:
4695 case BC_LEX_KEY_LAST:
4696 case BC_LEX_KEY_OBASE:
4697 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004698 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004699 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004700 prev = (char) (t - BC_LEX_KEY_IBASE + BC_INST_IBASE);
4701 bc_parse_push(p, (char) prev);
4702
4703 paren_expr = get_token = true;
4704 rprn = bin_last = false;
4705 ++nexprs;
4706
4707 break;
4708 }
4709
4710 case BC_LEX_KEY_LENGTH:
4711 case BC_LEX_KEY_SQRT:
4712 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004713 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004714 return bc_error_bad_expression();
Denys Vlasenko26819db2018-12-12 16:08:46 +01004715 s = zbc_parse_builtin(p, t, flags, &prev);
Gavin Howard01055ba2018-11-03 11:00:21 -06004716 paren_expr = true;
4717 rprn = get_token = bin_last = false;
4718 ++nexprs;
4719
4720 break;
4721 }
4722
4723 case BC_LEX_KEY_READ:
4724 {
4725 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004726 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004727 else if (flags & BC_PARSE_NOREAD)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004728 s = bc_error_nested_read_call();
Gavin Howard01055ba2018-11-03 11:00:21 -06004729 else
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004730 s = zbc_parse_read(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004731
4732 paren_expr = true;
4733 rprn = get_token = bin_last = false;
4734 ++nexprs;
4735 prev = BC_INST_READ;
4736
4737 break;
4738 }
4739
4740 case BC_LEX_KEY_SCALE:
4741 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004742 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004743 return bc_error_bad_expression();
Denys Vlasenko26819db2018-12-12 16:08:46 +01004744 s = zbc_parse_scale(p, &prev, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06004745 paren_expr = true;
4746 rprn = get_token = bin_last = false;
4747 ++nexprs;
4748 prev = BC_INST_SCALE;
4749
4750 break;
4751 }
4752
4753 default:
4754 {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004755 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06004756 break;
4757 }
4758 }
4759
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004760 if (!s && get_token) s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004761 }
4762
4763 if (s) return s;
Denys Vlasenkod38af482018-12-04 19:11:02 +01004764 if (G_interrupt) return BC_STATUS_FAILURE; // ^C: stop parsing
Gavin Howard01055ba2018-11-03 11:00:21 -06004765
4766 while (p->ops.len > ops_bgn) {
4767
4768 top = BC_PARSE_TOP_OP(p);
4769 assign = top >= BC_LEX_OP_ASSIGN_POWER && top <= BC_LEX_OP_ASSIGN;
4770
4771 if (top == BC_LEX_LPAREN || top == BC_LEX_RPAREN)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004772 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004773
Denys Vlasenko0154d782018-12-14 23:32:51 +01004774 bc_parse_push(p, BC_TOKEN_2_INST(top));
Gavin Howard01055ba2018-11-03 11:00:21 -06004775
4776 nexprs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_NEG;
4777 bc_vec_pop(&p->ops);
4778 }
4779
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004780 if (prev == BC_INST_BOOL_NOT || nexprs != 1)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004781 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004782
Gavin Howard01055ba2018-11-03 11:00:21 -06004783 if (!(flags & BC_PARSE_REL) && nrelops) {
Denys Vlasenko00646792018-12-05 18:12:27 +01004784 s = bc_POSIX_does_not_allow("comparison operators outside if or loops");
Denys Vlasenkoec603182018-12-17 10:34:02 +01004785 IF_ERROR_RETURN_POSSIBLE(if (s) return s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004786 }
4787 else if ((flags & BC_PARSE_REL) && nrelops > 1) {
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01004788 s = bc_POSIX_requires("exactly one comparison operator per condition");
Denys Vlasenkoec603182018-12-17 10:34:02 +01004789 IF_ERROR_RETURN_POSSIBLE(if (s) return s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004790 }
4791
4792 if (flags & BC_PARSE_PRINT) {
4793 if (paren_first || !assign) bc_parse_push(p, BC_INST_PRINT);
4794 bc_parse_push(p, BC_INST_POP);
4795 }
4796
Denys Vlasenko17df8822018-12-14 23:00:24 +01004797 dbg_lex_done("%s:%d done", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004798 return s;
4799}
4800
Gavin Howard01055ba2018-11-03 11:00:21 -06004801#endif // ENABLE_BC
4802
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01004803#if ENABLE_DC
Denys Vlasenkocca79a02018-12-05 21:15:46 +01004804
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004805static BC_STATUS zdc_parse_register(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004806{
4807 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06004808
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004809 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004810 if (s) RETURN_STATUS(s);
4811 if (p->l.t.t != BC_LEX_NAME) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004812
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01004813 bc_parse_pushName(p, p->l.t.v.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06004814
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004815 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004816}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004817#define zdc_parse_register(...) (zdc_parse_register(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004818
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004819static BC_STATUS zdc_parse_string(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004820{
Denys Vlasenkoe42cc192018-12-17 11:02:26 +01004821 char *str, *name;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01004822 size_t idx, len = G.prog.strs.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06004823
Denys Vlasenkoe42cc192018-12-17 11:02:26 +01004824//why pad to 32 zeros??
4825 name = xasprintf("%032lu", (unsigned long)len);
Gavin Howard01055ba2018-11-03 11:00:21 -06004826
4827 str = xstrdup(p->l.t.v.v);
4828 bc_parse_push(p, BC_INST_STR);
4829 bc_parse_pushIndex(p, len);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01004830 bc_vec_push(&G.prog.strs, &str);
Gavin Howard01055ba2018-11-03 11:00:21 -06004831 bc_parse_addFunc(p, name, &idx);
4832
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004833 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004834}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004835#define zdc_parse_string(...) (zdc_parse_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004836
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004837static BC_STATUS zdc_parse_mem(BcParse *p, uint8_t inst, bool name, bool store)
Gavin Howard01055ba2018-11-03 11:00:21 -06004838{
4839 BcStatus s;
4840
4841 bc_parse_push(p, inst);
4842 if (name) {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004843 s = zdc_parse_register(p);
4844 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004845 }
4846
4847 if (store) {
4848 bc_parse_push(p, BC_INST_SWAP);
4849 bc_parse_push(p, BC_INST_ASSIGN);
4850 bc_parse_push(p, BC_INST_POP);
4851 }
4852
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004853 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004854}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004855#define zdc_parse_mem(...) (zdc_parse_mem(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004856
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004857static BC_STATUS zdc_parse_cond(BcParse *p, uint8_t inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06004858{
4859 BcStatus s;
4860
4861 bc_parse_push(p, inst);
4862 bc_parse_push(p, BC_INST_EXEC_COND);
4863
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004864 s = zdc_parse_register(p);
4865 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004866
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004867 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004868 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004869
4870 if (p->l.t.t == BC_LEX_ELSE) {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004871 s = zdc_parse_register(p);
4872 if (s) RETURN_STATUS(s);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004873 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004874 }
4875 else
4876 bc_parse_push(p, BC_PARSE_STREND);
4877
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004878 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004879}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004880#define zdc_parse_cond(...) (zdc_parse_cond(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004881
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004882static BC_STATUS zdc_parse_token(BcParse *p, BcLexType t, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06004883{
4884 BcStatus s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06004885 uint8_t inst;
4886 bool assign, get_token = false;
4887
4888 switch (t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004889 case BC_LEX_OP_REL_EQ:
4890 case BC_LEX_OP_REL_LE:
4891 case BC_LEX_OP_REL_GE:
4892 case BC_LEX_OP_REL_NE:
4893 case BC_LEX_OP_REL_LT:
4894 case BC_LEX_OP_REL_GT:
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004895 s = zdc_parse_cond(p, t - BC_LEX_OP_REL_EQ + BC_INST_REL_EQ);
Gavin Howard01055ba2018-11-03 11:00:21 -06004896 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004897 case BC_LEX_SCOLON:
4898 case BC_LEX_COLON:
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004899 s = zdc_parse_mem(p, BC_INST_ARRAY_ELEM, true, t == BC_LEX_COLON);
Gavin Howard01055ba2018-11-03 11:00:21 -06004900 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004901 case BC_LEX_STR:
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004902 s = zdc_parse_string(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004903 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004904 case BC_LEX_NEG:
4905 case BC_LEX_NUMBER:
Gavin Howard01055ba2018-11-03 11:00:21 -06004906 if (t == BC_LEX_NEG) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004907 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004908 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004909 if (p->l.t.t != BC_LEX_NUMBER)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004910 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004911 }
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01004912 bc_parse_number(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004913 if (t == BC_LEX_NEG) bc_parse_push(p, BC_INST_NEG);
4914 get_token = true;
Gavin Howard01055ba2018-11-03 11:00:21 -06004915 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004916 case BC_LEX_KEY_READ:
Gavin Howard01055ba2018-11-03 11:00:21 -06004917 if (flags & BC_PARSE_NOREAD)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004918 s = bc_error_nested_read_call();
Gavin Howard01055ba2018-11-03 11:00:21 -06004919 else
4920 bc_parse_push(p, BC_INST_READ);
4921 get_token = true;
4922 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004923 case BC_LEX_OP_ASSIGN:
4924 case BC_LEX_STORE_PUSH:
Gavin Howard01055ba2018-11-03 11:00:21 -06004925 assign = t == BC_LEX_OP_ASSIGN;
4926 inst = assign ? BC_INST_VAR : BC_INST_PUSH_TO_VAR;
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004927 s = zdc_parse_mem(p, inst, true, assign);
Gavin Howard01055ba2018-11-03 11:00:21 -06004928 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004929 case BC_LEX_LOAD:
4930 case BC_LEX_LOAD_POP:
Gavin Howard01055ba2018-11-03 11:00:21 -06004931 inst = t == BC_LEX_LOAD_POP ? BC_INST_PUSH_VAR : BC_INST_LOAD;
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004932 s = zdc_parse_mem(p, inst, true, false);
Gavin Howard01055ba2018-11-03 11:00:21 -06004933 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004934 case BC_LEX_STORE_IBASE:
4935 case BC_LEX_STORE_SCALE:
4936 case BC_LEX_STORE_OBASE:
Gavin Howard01055ba2018-11-03 11:00:21 -06004937 inst = t - BC_LEX_STORE_IBASE + BC_INST_IBASE;
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004938 s = zdc_parse_mem(p, inst, false, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06004939 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004940 default:
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004941 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06004942 get_token = true;
4943 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004944 }
4945
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004946 if (!s && get_token) s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004947
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004948 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004949}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004950#define zdc_parse_token(...) (zdc_parse_token(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004951
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004952static BC_STATUS zdc_parse_expr(BcParse *p, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06004953{
Gavin Howard01055ba2018-11-03 11:00:21 -06004954 BcLexType t;
4955
Denys Vlasenkoa199cc92018-12-18 14:11:35 +01004956 for (;;) {
4957 BcInst inst;
4958 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06004959
Denys Vlasenkoa199cc92018-12-18 14:11:35 +01004960 t = p->l.t.t;
4961 if (t == BC_LEX_EOF) break;
4962
4963 inst = dc_parse_insts[t];
Gavin Howard01055ba2018-11-03 11:00:21 -06004964 if (inst != BC_INST_INVALID) {
4965 bc_parse_push(p, inst);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004966 s = zbc_lex_next(&p->l);
Denys Vlasenkoa199cc92018-12-18 14:11:35 +01004967 } else {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004968 s = zdc_parse_token(p, t, flags);
Denys Vlasenkoa199cc92018-12-18 14:11:35 +01004969 }
4970 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004971 }
4972
Denys Vlasenkoa199cc92018-12-18 14:11:35 +01004973 if (flags & BC_PARSE_NOCALL)
Gavin Howard01055ba2018-11-03 11:00:21 -06004974 bc_parse_push(p, BC_INST_POP_EXEC);
4975
Denys Vlasenkoa199cc92018-12-18 14:11:35 +01004976 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06004977}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004978#define zdc_parse_expr(...) (zdc_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004979
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01004980static BC_STATUS zdc_parse_parse(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004981{
4982 BcStatus s;
4983
4984 if (p->l.t.t == BC_LEX_EOF)
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004985 s = bc_error("end of file");
Gavin Howard01055ba2018-11-03 11:00:21 -06004986 else
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004987 s = zdc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004988
Denys Vlasenkod38af482018-12-04 19:11:02 +01004989 if (s || G_interrupt) {
4990 bc_parse_reset(p);
4991 s = BC_STATUS_FAILURE;
4992 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004993
Denys Vlasenko26819db2018-12-12 16:08:46 +01004994 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004995}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004996#define zdc_parse_parse(...) (zdc_parse_parse(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004997
Gavin Howard01055ba2018-11-03 11:00:21 -06004998#endif // ENABLE_DC
4999
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01005000static BC_STATUS zcommon_parse_expr(BcParse *p, uint8_t flags)
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01005001{
5002 if (IS_BC) {
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01005003 IF_BC(RETURN_STATUS(zbc_parse_expr(p, flags)));
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01005004 } else {
Denys Vlasenko99b37622018-12-15 20:06:59 +01005005 IF_DC(RETURN_STATUS(zdc_parse_expr(p, flags)));
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01005006 }
5007}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005008#define zcommon_parse_expr(...) (zcommon_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01005009
Denys Vlasenkodf515392018-12-02 19:27:48 +01005010static BcVec* bc_program_search(char *id, bool var)
Gavin Howard01055ba2018-11-03 11:00:21 -06005011{
Gavin Howard01055ba2018-11-03 11:00:21 -06005012 BcId e, *ptr;
5013 BcVec *v, *map;
5014 size_t i;
5015 BcResultData data;
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01005016 int new;
Gavin Howard01055ba2018-11-03 11:00:21 -06005017
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005018 v = var ? &G.prog.vars : &G.prog.arrs;
5019 map = var ? &G.prog.var_map : &G.prog.arr_map;
Gavin Howard01055ba2018-11-03 11:00:21 -06005020
5021 e.name = id;
5022 e.idx = v->len;
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01005023 new = bc_map_insert(map, &e, &i); // 1 if insertion was successful
Gavin Howard01055ba2018-11-03 11:00:21 -06005024
5025 if (new) {
5026 bc_array_init(&data.v, var);
5027 bc_vec_push(v, &data.v);
5028 }
5029
5030 ptr = bc_vec_item(map, i);
5031 if (new) ptr->name = xstrdup(e.name);
Denys Vlasenkodf515392018-12-02 19:27:48 +01005032 return bc_vec_item(v, ptr->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005033}
5034
Denys Vlasenko29301232018-12-11 15:29:32 +01005035static BC_STATUS zbc_program_num(BcResult *r, BcNum **num, bool hex)
Gavin Howard01055ba2018-11-03 11:00:21 -06005036{
Gavin Howard01055ba2018-11-03 11:00:21 -06005037 switch (r->t) {
5038
5039 case BC_RESULT_STR:
5040 case BC_RESULT_TEMP:
5041 case BC_RESULT_IBASE:
5042 case BC_RESULT_SCALE:
5043 case BC_RESULT_OBASE:
5044 {
5045 *num = &r->d.n;
5046 break;
5047 }
5048
5049 case BC_RESULT_CONSTANT:
5050 {
Denys Vlasenkofa35e592018-12-10 20:17:24 +01005051 BcStatus s;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005052 char **str = bc_vec_item(&G.prog.consts, r->d.id.idx);
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005053 unsigned base_t;
5054 size_t len = strlen(*str);
Gavin Howard01055ba2018-11-03 11:00:21 -06005055
5056 bc_num_init(&r->d.n, len);
5057
5058 hex = hex && len == 1;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005059 base_t = hex ? 16 : G.prog.ib_t;
5060 s = zbc_num_parse(&r->d.n, *str, base_t);
Gavin Howard01055ba2018-11-03 11:00:21 -06005061
5062 if (s) {
5063 bc_num_free(&r->d.n);
Denys Vlasenko29301232018-12-11 15:29:32 +01005064 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005065 }
5066
5067 *num = &r->d.n;
5068 r->t = BC_RESULT_TEMP;
5069
5070 break;
5071 }
5072
5073 case BC_RESULT_VAR:
5074 case BC_RESULT_ARRAY:
5075 case BC_RESULT_ARRAY_ELEM:
5076 {
5077 BcVec *v;
5078
Denys Vlasenkodf515392018-12-02 19:27:48 +01005079 v = bc_program_search(r->d.id.name, r->t == BC_RESULT_VAR);
Gavin Howard01055ba2018-11-03 11:00:21 -06005080
5081 if (r->t == BC_RESULT_ARRAY_ELEM) {
5082 v = bc_vec_top(v);
5083 if (v->len <= r->d.id.idx) bc_array_expand(v, r->d.id.idx + 1);
5084 *num = bc_vec_item(v, r->d.id.idx);
5085 }
5086 else
5087 *num = bc_vec_top(v);
5088
5089 break;
5090 }
5091
5092 case BC_RESULT_LAST:
5093 {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005094 *num = &G.prog.last;
Gavin Howard01055ba2018-11-03 11:00:21 -06005095 break;
5096 }
5097
5098 case BC_RESULT_ONE:
5099 {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005100 *num = &G.prog.one;
Gavin Howard01055ba2018-11-03 11:00:21 -06005101 break;
5102 }
5103 }
5104
Denys Vlasenko29301232018-12-11 15:29:32 +01005105 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005106}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005107#define zbc_program_num(...) (zbc_program_num(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005108
Denys Vlasenko29301232018-12-11 15:29:32 +01005109static BC_STATUS zbc_program_binOpPrep(BcResult **l, BcNum **ln,
Gavin Howard01055ba2018-11-03 11:00:21 -06005110 BcResult **r, BcNum **rn, bool assign)
5111{
5112 BcStatus s;
5113 bool hex;
5114 BcResultType lt, rt;
5115
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005116 if (!BC_PROG_STACK(&G.prog.results, 2))
Denys Vlasenko29301232018-12-11 15:29:32 +01005117 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005118
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005119 *r = bc_vec_item_rev(&G.prog.results, 0);
5120 *l = bc_vec_item_rev(&G.prog.results, 1);
Gavin Howard01055ba2018-11-03 11:00:21 -06005121
5122 lt = (*l)->t;
5123 rt = (*r)->t;
5124 hex = assign && (lt == BC_RESULT_IBASE || lt == BC_RESULT_OBASE);
5125
Denys Vlasenko29301232018-12-11 15:29:32 +01005126 s = zbc_program_num(*l, ln, false);
5127 if (s) RETURN_STATUS(s);
5128 s = zbc_program_num(*r, rn, hex);
5129 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005130
5131 // We run this again under these conditions in case any vector has been
5132 // reallocated out from under the BcNums or arrays we had.
5133 if (lt == rt && (lt == BC_RESULT_VAR || lt == BC_RESULT_ARRAY_ELEM)) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005134 s = zbc_program_num(*l, ln, false);
5135 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005136 }
5137
5138 if (!BC_PROG_NUM((*l), (*ln)) && (!assign || (*l)->t != BC_RESULT_VAR))
Denys Vlasenko29301232018-12-11 15:29:32 +01005139 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005140 if (!assign && !BC_PROG_NUM((*r), (*ln)))
Denys Vlasenko29301232018-12-11 15:29:32 +01005141 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06005142
Denys Vlasenko29301232018-12-11 15:29:32 +01005143 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005144}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005145#define zbc_program_binOpPrep(...) (zbc_program_binOpPrep(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005146
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005147static void bc_program_binOpRetire(BcResult *r)
Gavin Howard01055ba2018-11-03 11:00:21 -06005148{
5149 r->t = BC_RESULT_TEMP;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005150 bc_vec_pop(&G.prog.results);
5151 bc_vec_pop(&G.prog.results);
5152 bc_vec_push(&G.prog.results, r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005153}
5154
Denys Vlasenko29301232018-12-11 15:29:32 +01005155static BC_STATUS zbc_program_prep(BcResult **r, BcNum **n)
Gavin Howard01055ba2018-11-03 11:00:21 -06005156{
5157 BcStatus s;
5158
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005159 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01005160 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005161 *r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005162
Denys Vlasenko29301232018-12-11 15:29:32 +01005163 s = zbc_program_num(*r, n, false);
5164 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005165
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005166 if (!BC_PROG_NUM((*r), (*n)))
Denys Vlasenko29301232018-12-11 15:29:32 +01005167 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06005168
Denys Vlasenko29301232018-12-11 15:29:32 +01005169 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005170}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005171#define zbc_program_prep(...) (zbc_program_prep(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005172
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005173static void bc_program_retire(BcResult *r, BcResultType t)
Gavin Howard01055ba2018-11-03 11:00:21 -06005174{
5175 r->t = t;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005176 bc_vec_pop(&G.prog.results);
5177 bc_vec_push(&G.prog.results, r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005178}
5179
Denys Vlasenko259137d2018-12-11 19:42:05 +01005180static BC_STATUS zbc_program_op(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005181{
5182 BcStatus s;
5183 BcResult *opd1, *opd2, res;
5184 BcNum *n1, *n2 = NULL;
5185
Denys Vlasenko29301232018-12-11 15:29:32 +01005186 s = zbc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
Denys Vlasenko259137d2018-12-11 19:42:05 +01005187 if (s) RETURN_STATUS(s);
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005188 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005189
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005190 s = BC_STATUS_SUCCESS;
Denys Vlasenkoec603182018-12-17 10:34:02 +01005191 IF_ERROR_RETURN_POSSIBLE(s =) zbc_program_ops[inst - BC_INST_POWER](n1, n2, &res.d.n, G.prog.scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06005192 if (s) goto err;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005193 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005194
Denys Vlasenko259137d2018-12-11 19:42:05 +01005195 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005196
5197err:
5198 bc_num_free(&res.d.n);
Denys Vlasenko259137d2018-12-11 19:42:05 +01005199 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005200}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005201#define zbc_program_op(...) (zbc_program_op(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005202
Denys Vlasenko26819db2018-12-12 16:08:46 +01005203static BC_STATUS zbc_program_read(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06005204{
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005205 const char *sv_file;
Gavin Howard01055ba2018-11-03 11:00:21 -06005206 BcStatus s;
5207 BcParse parse;
5208 BcVec buf;
5209 BcInstPtr ip;
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005210 BcFunc *f;
Gavin Howard01055ba2018-11-03 11:00:21 -06005211
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005212 if (G.in_read)
Denys Vlasenko26819db2018-12-12 16:08:46 +01005213 RETURN_STATUS(bc_error_nested_read_call());
Gavin Howard01055ba2018-11-03 11:00:21 -06005214
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005215 f = bc_program_func(BC_PROG_READ);
Denys Vlasenko7d628012018-12-04 21:46:47 +01005216 bc_vec_pop_all(&f->code);
Gavin Howard01055ba2018-11-03 11:00:21 -06005217
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005218 sv_file = G.prog.file;
5219 G.prog.file = NULL;
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005220 G.in_read = 1;
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005221
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01005222 bc_char_vec_init(&buf);
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01005223 bc_read_line(&buf, stdin);
Gavin Howard01055ba2018-11-03 11:00:21 -06005224
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01005225 bc_parse_create(&parse, BC_PROG_READ);
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005226 bc_lex_file(&parse.l);
Gavin Howard01055ba2018-11-03 11:00:21 -06005227
Denys Vlasenkof86e9602018-12-14 17:01:56 +01005228 s = zbc_parse_text_init(&parse, buf.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06005229 if (s) goto exec_err;
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01005230 s = zcommon_parse_expr(&parse, BC_PARSE_NOREAD);
Gavin Howard01055ba2018-11-03 11:00:21 -06005231 if (s) goto exec_err;
5232
5233 if (parse.l.t.t != BC_LEX_NLINE && parse.l.t.t != BC_LEX_EOF) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005234 s = bc_error("bad read() expression");
Gavin Howard01055ba2018-11-03 11:00:21 -06005235 goto exec_err;
5236 }
5237
5238 ip.func = BC_PROG_READ;
5239 ip.idx = 0;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005240 ip.len = G.prog.results.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06005241
5242 // Update this pointer, just in case.
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005243 f = bc_program_func(BC_PROG_READ);
Gavin Howard01055ba2018-11-03 11:00:21 -06005244
5245 bc_vec_pushByte(&f->code, BC_INST_POP_EXEC);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005246 bc_vec_push(&G.prog.stack, &ip);
Gavin Howard01055ba2018-11-03 11:00:21 -06005247
5248exec_err:
5249 bc_parse_free(&parse);
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005250 G.in_read = 0;
Denys Vlasenko4dd36522018-12-11 22:26:38 +01005251 G.prog.file = sv_file;
Gavin Howard01055ba2018-11-03 11:00:21 -06005252 bc_vec_free(&buf);
Denys Vlasenko26819db2018-12-12 16:08:46 +01005253 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005254}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005255#define zbc_program_read(...) (zbc_program_read(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005256
5257static size_t bc_program_index(char *code, size_t *bgn)
5258{
5259 char amt = code[(*bgn)++], i = 0;
5260 size_t res = 0;
5261
5262 for (; i < amt; ++i, ++(*bgn))
5263 res |= (((size_t)((int) code[*bgn]) & UCHAR_MAX) << (i * CHAR_BIT));
5264
5265 return res;
5266}
5267
5268static char *bc_program_name(char *code, size_t *bgn)
5269{
5270 size_t i;
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01005271 char *s, *str = code + *bgn, *ptr = strchr(str, BC_PARSE_STREND);
Gavin Howard01055ba2018-11-03 11:00:21 -06005272
5273 s = xmalloc(ptr - str + 1);
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01005274 i = 0;
5275 for (;;) {
5276 char c = code[(*bgn)++];
5277 if (c == '\0' || c == BC_PARSE_STREND)
5278 break;
5279 s[i++] = c;
5280 }
Gavin Howard01055ba2018-11-03 11:00:21 -06005281 s[i] = '\0';
5282
5283 return s;
5284}
5285
Denys Vlasenko5f1b90b2018-12-08 23:18:06 +01005286static void bc_program_printString(const char *str)
Gavin Howard01055ba2018-11-03 11:00:21 -06005287{
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005288#if ENABLE_DC
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005289 if (!str[0]) {
Denys Vlasenko2c6f5632018-12-11 21:21:14 +01005290 // Example: echo '[]ap' | dc
5291 // should print two bytes: 0x00, 0x0A
Denys Vlasenko00d77792018-11-30 23:13:42 +01005292 bb_putchar('\0');
Gavin Howard01055ba2018-11-03 11:00:21 -06005293 return;
5294 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005295#endif
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005296 while (*str) {
5297 int c = *str++;
5298 if (c != '\\' || !*str)
Denys Vlasenko00d77792018-11-30 23:13:42 +01005299 bb_putchar(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06005300 else {
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005301 c = *str++;
Gavin Howard01055ba2018-11-03 11:00:21 -06005302 switch (c) {
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005303 case 'a':
5304 bb_putchar('\a');
5305 break;
5306 case 'b':
5307 bb_putchar('\b');
5308 break;
5309 case '\\':
5310 case 'e':
5311 bb_putchar('\\');
5312 break;
5313 case 'f':
5314 bb_putchar('\f');
5315 break;
5316 case 'n':
5317 bb_putchar('\n');
5318 G.prog.nchars = SIZE_MAX;
5319 break;
5320 case 'r':
5321 bb_putchar('\r');
5322 break;
5323 case 'q':
5324 bb_putchar('"');
5325 break;
5326 case 't':
5327 bb_putchar('\t');
5328 break;
5329 default:
5330 // Just print the backslash and following character.
5331 bb_putchar('\\');
5332 ++G.prog.nchars;
5333 bb_putchar(c);
5334 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06005335 }
5336 }
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005337 ++G.prog.nchars;
Gavin Howard01055ba2018-11-03 11:00:21 -06005338 }
5339}
5340
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005341static void bc_num_printNewline(void)
5342{
5343 if (G.prog.nchars == G.prog.len - 1) {
5344 bb_putchar('\\');
5345 bb_putchar('\n');
5346 G.prog.nchars = 0;
5347 }
5348}
5349
5350#if ENABLE_DC
5351static FAST_FUNC void bc_num_printChar(size_t num, size_t width, bool radix)
5352{
5353 (void) radix;
5354 bb_putchar((char) num);
5355 G.prog.nchars += width;
5356}
5357#endif
5358
5359static FAST_FUNC void bc_num_printDigits(size_t num, size_t width, bool radix)
5360{
5361 size_t exp, pow;
5362
5363 bc_num_printNewline();
5364 bb_putchar(radix ? '.' : ' ');
5365 ++G.prog.nchars;
5366
5367 bc_num_printNewline();
5368 for (exp = 0, pow = 1; exp < width - 1; ++exp, pow *= 10)
5369 continue;
5370
5371 for (exp = 0; exp < width; pow /= 10, ++G.prog.nchars, ++exp) {
5372 size_t dig;
5373 bc_num_printNewline();
5374 dig = num / pow;
5375 num -= dig * pow;
5376 bb_putchar(((char) dig) + '0');
5377 }
5378}
5379
5380static FAST_FUNC void bc_num_printHex(size_t num, size_t width, bool radix)
5381{
5382 if (radix) {
5383 bc_num_printNewline();
5384 bb_putchar('.');
5385 G.prog.nchars += 1;
5386 }
5387
5388 bc_num_printNewline();
5389 bb_putchar(bb_hexdigits_upcase[num]);
5390 G.prog.nchars += width;
5391}
5392
5393static void bc_num_printDecimal(BcNum *n)
5394{
5395 size_t i, rdx = n->rdx - 1;
5396
5397 if (n->neg) bb_putchar('-');
5398 G.prog.nchars += n->neg;
5399
5400 for (i = n->len - 1; i < n->len; --i)
5401 bc_num_printHex((size_t) n->num[i], 1, i == rdx);
5402}
5403
5404static BC_STATUS zbc_num_printNum(BcNum *n, BcNum *base, size_t width, BcNumDigitOp print)
5405{
5406 BcStatus s;
5407 BcVec stack;
5408 BcNum intp, fracp, digit, frac_len;
5409 unsigned long dig, *ptr;
5410 size_t i;
5411 bool radix;
5412
5413 if (n->len == 0) {
5414 print(0, width, false);
5415 RETURN_STATUS(BC_STATUS_SUCCESS);
5416 }
5417
5418 bc_vec_init(&stack, sizeof(long), NULL);
5419 bc_num_init(&intp, n->len);
5420 bc_num_init(&fracp, n->rdx);
5421 bc_num_init(&digit, width);
5422 bc_num_init(&frac_len, BC_NUM_INT(n));
5423 bc_num_copy(&intp, n);
5424 bc_num_one(&frac_len);
5425
5426 bc_num_truncate(&intp, intp.rdx);
5427 s = zbc_num_sub(n, &intp, &fracp, 0);
5428 if (s) goto err;
5429
5430 while (intp.len != 0) {
5431 s = zbc_num_divmod(&intp, base, &intp, &digit, 0);
5432 if (s) goto err;
5433 s = zbc_num_ulong(&digit, &dig);
5434 if (s) goto err;
5435 bc_vec_push(&stack, &dig);
5436 }
5437
5438 for (i = 0; i < stack.len; ++i) {
5439 ptr = bc_vec_item_rev(&stack, i);
5440 print(*ptr, width, false);
5441 }
5442
5443 if (!n->rdx) goto err;
5444
5445 for (radix = true; frac_len.len <= n->rdx; radix = false) {
5446 s = zbc_num_mul(&fracp, base, &fracp, n->rdx);
5447 if (s) goto err;
5448 s = zbc_num_ulong(&fracp, &dig);
5449 if (s) goto err;
5450 bc_num_ulong2num(&intp, dig);
5451 s = zbc_num_sub(&fracp, &intp, &fracp, 0);
5452 if (s) goto err;
5453 print(dig, width, radix);
5454 s = zbc_num_mul(&frac_len, base, &frac_len, 0);
5455 if (s) goto err;
5456 }
5457
5458err:
5459 bc_num_free(&frac_len);
5460 bc_num_free(&digit);
5461 bc_num_free(&fracp);
5462 bc_num_free(&intp);
5463 bc_vec_free(&stack);
5464 RETURN_STATUS(s);
5465}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005466#define zbc_num_printNum(...) (zbc_num_printNum(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005467
5468static BC_STATUS zbc_num_printBase(BcNum *n)
5469{
5470 BcStatus s;
Denys Vlasenkod4258dd2018-12-18 13:22:23 +01005471 size_t width;
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005472 BcNumDigitOp print;
5473 bool neg = n->neg;
5474
5475 if (neg) {
5476 bb_putchar('-');
5477 G.prog.nchars++;
5478 }
5479
5480 n->neg = false;
5481
5482 if (G.prog.ob_t <= BC_NUM_MAX_IBASE) {
5483 width = 1;
5484 print = bc_num_printHex;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005485 } else {
Denys Vlasenkod4258dd2018-12-18 13:22:23 +01005486 unsigned i = G.prog.ob_t - 1;
5487 width = 0;
5488 for (;;) {
5489 width++;
5490 i /= 10;
5491 if (i == 0)
5492 break;
5493 }
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005494 print = bc_num_printDigits;
5495 }
5496
5497 s = zbc_num_printNum(n, &G.prog.ob, width, print);
5498 n->neg = neg;
5499
5500 RETURN_STATUS(s);
5501}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005502#define zbc_num_printBase(...) (zbc_num_printBase(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005503
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005504static BC_STATUS zbc_num_print(BcNum *n, bool newline)
5505{
5506 BcStatus s = BC_STATUS_SUCCESS;
5507
5508 bc_num_printNewline();
5509
5510 if (n->len == 0) {
5511 bb_putchar('0');
5512 ++G.prog.nchars;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005513 } else if (G.prog.ob_t == 10)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005514 bc_num_printDecimal(n);
5515 else
5516 s = zbc_num_printBase(n);
5517
5518 if (newline) {
5519 bb_putchar('\n');
5520 G.prog.nchars = 0;
5521 }
5522
5523 RETURN_STATUS(s);
5524}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005525#define zbc_num_print(...) (zbc_num_print(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005526
Denys Vlasenko29301232018-12-11 15:29:32 +01005527static BC_STATUS zbc_program_print(char inst, size_t idx)
Gavin Howard01055ba2018-11-03 11:00:21 -06005528{
Denys Vlasenkofa35e592018-12-10 20:17:24 +01005529 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06005530 BcResult *r;
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005531 BcNum *num;
Gavin Howard01055ba2018-11-03 11:00:21 -06005532 bool pop = inst != BC_INST_PRINT;
5533
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005534 if (!BC_PROG_STACK(&G.prog.results, idx + 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01005535 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005536
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005537 r = bc_vec_item_rev(&G.prog.results, idx);
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005538 num = NULL; // is this NULL necessary?
Denys Vlasenko29301232018-12-11 15:29:32 +01005539 s = zbc_program_num(r, &num, false);
5540 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005541
5542 if (BC_PROG_NUM(r, num)) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005543 s = zbc_num_print(num, !pop);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005544 if (!s) bc_num_copy(&G.prog.last, num);
Gavin Howard01055ba2018-11-03 11:00:21 -06005545 }
5546 else {
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005547 char *str;
Gavin Howard01055ba2018-11-03 11:00:21 -06005548
5549 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005550 str = *bc_program_str(idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005551
5552 if (inst == BC_INST_PRINT_STR) {
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005553 for (;;) {
5554 char c = *str++;
5555 if (c == '\0') break;
Denys Vlasenko00d77792018-11-30 23:13:42 +01005556 bb_putchar(c);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005557 ++G.prog.nchars;
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005558 if (c == '\n') G.prog.nchars = 0;
Gavin Howard01055ba2018-11-03 11:00:21 -06005559 }
5560 }
5561 else {
Denys Vlasenko5f1b90b2018-12-08 23:18:06 +01005562 bc_program_printString(str);
Denys Vlasenko00d77792018-11-30 23:13:42 +01005563 if (inst == BC_INST_PRINT) bb_putchar('\n');
Gavin Howard01055ba2018-11-03 11:00:21 -06005564 }
5565 }
5566
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005567 if (!s && pop) bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005568
Denys Vlasenko29301232018-12-11 15:29:32 +01005569 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005570}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005571#define zbc_program_print(...) (zbc_program_print(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005572
Denys Vlasenko29301232018-12-11 15:29:32 +01005573static BC_STATUS zbc_program_negate(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06005574{
5575 BcStatus s;
5576 BcResult res, *ptr;
5577 BcNum *num = NULL;
5578
Denys Vlasenko29301232018-12-11 15:29:32 +01005579 s = zbc_program_prep(&ptr, &num);
5580 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005581
5582 bc_num_init(&res.d.n, num->len);
5583 bc_num_copy(&res.d.n, num);
5584 if (res.d.n.len) res.d.n.neg = !res.d.n.neg;
5585
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005586 bc_program_retire(&res, BC_RESULT_TEMP);
Gavin Howard01055ba2018-11-03 11:00:21 -06005587
Denys Vlasenko29301232018-12-11 15:29:32 +01005588 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005589}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005590#define zbc_program_negate(...) (zbc_program_negate(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005591
Denys Vlasenko728e7c92018-12-11 19:37:00 +01005592static BC_STATUS zbc_program_logical(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005593{
5594 BcStatus s;
5595 BcResult *opd1, *opd2, res;
5596 BcNum *n1, *n2;
Denys Vlasenko16494f52018-12-12 00:50:23 +01005597 ssize_t cond;
Gavin Howard01055ba2018-11-03 11:00:21 -06005598
Denys Vlasenko29301232018-12-11 15:29:32 +01005599 s = zbc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
Denys Vlasenko728e7c92018-12-11 19:37:00 +01005600 if (s) RETURN_STATUS(s);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005601
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005602 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005603
5604 if (inst == BC_INST_BOOL_AND)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005605 cond = bc_num_cmp(n1, &G.prog.zero) && bc_num_cmp(n2, &G.prog.zero);
Gavin Howard01055ba2018-11-03 11:00:21 -06005606 else if (inst == BC_INST_BOOL_OR)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005607 cond = bc_num_cmp(n1, &G.prog.zero) || bc_num_cmp(n2, &G.prog.zero);
Gavin Howard01055ba2018-11-03 11:00:21 -06005608 else {
Denys Vlasenko16494f52018-12-12 00:50:23 +01005609 cond = bc_num_cmp(n1, n2);
Gavin Howard01055ba2018-11-03 11:00:21 -06005610 switch (inst) {
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005611 case BC_INST_REL_EQ:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005612 cond = (cond == 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005613 break;
5614 case BC_INST_REL_LE:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005615 cond = (cond <= 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005616 break;
5617 case BC_INST_REL_GE:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005618 cond = (cond >= 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005619 break;
5620 case BC_INST_REL_LT:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005621 cond = (cond < 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005622 break;
5623 case BC_INST_REL_GT:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005624 cond = (cond > 0);
5625 break;
5626 default: // = case BC_INST_REL_NE:
5627 //cond = (cond != 0); - not needed
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005628 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06005629 }
5630 }
5631
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005632 if (cond) bc_num_one(&res.d.n);
5633 //else bc_num_zero(&res.d.n); - already is
Gavin Howard01055ba2018-11-03 11:00:21 -06005634
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005635 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005636
Denys Vlasenko728e7c92018-12-11 19:37:00 +01005637 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005638}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005639#define zbc_program_logical(...) (zbc_program_logical(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005640
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005641#if ENABLE_DC
Denys Vlasenko29301232018-12-11 15:29:32 +01005642static BC_STATUS zbc_program_assignStr(BcResult *r, BcVec *v,
Gavin Howard01055ba2018-11-03 11:00:21 -06005643 bool push)
5644{
5645 BcNum n2;
5646 BcResult res;
5647
5648 memset(&n2, 0, sizeof(BcNum));
5649 n2.rdx = res.d.id.idx = r->d.id.idx;
5650 res.t = BC_RESULT_STR;
5651
5652 if (!push) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005653 if (!BC_PROG_STACK(&G.prog.results, 2))
Denys Vlasenko29301232018-12-11 15:29:32 +01005654 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005655 bc_vec_pop(v);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005656 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005657 }
5658
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005659 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005660
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005661 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005662 bc_vec_push(v, &n2);
5663
Denys Vlasenko29301232018-12-11 15:29:32 +01005664 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005665}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005666#define zbc_program_assignStr(...) (zbc_program_assignStr(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005667#endif // ENABLE_DC
5668
Denys Vlasenko29301232018-12-11 15:29:32 +01005669static BC_STATUS zbc_program_copyToVar(char *name, bool var)
Gavin Howard01055ba2018-11-03 11:00:21 -06005670{
5671 BcStatus s;
5672 BcResult *ptr, r;
5673 BcVec *v;
5674 BcNum *n;
5675
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005676 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01005677 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005678
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005679 ptr = bc_vec_top(&G.prog.results);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005680 if ((ptr->t == BC_RESULT_ARRAY) != !var)
Denys Vlasenko29301232018-12-11 15:29:32 +01005681 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenkodf515392018-12-02 19:27:48 +01005682 v = bc_program_search(name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06005683
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005684#if ENABLE_DC
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005685 if (ptr->t == BC_RESULT_STR && !var)
Denys Vlasenko29301232018-12-11 15:29:32 +01005686 RETURN_STATUS(bc_error_variable_is_wrong_type());
5687 if (ptr->t == BC_RESULT_STR)
5688 RETURN_STATUS(zbc_program_assignStr(ptr, v, true));
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005689#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06005690
Denys Vlasenko29301232018-12-11 15:29:32 +01005691 s = zbc_program_num(ptr, &n, false);
5692 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005693
5694 // Do this once more to make sure that pointers were not invalidated.
Denys Vlasenkodf515392018-12-02 19:27:48 +01005695 v = bc_program_search(name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06005696
5697 if (var) {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005698 bc_num_init_DEF_SIZE(&r.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005699 bc_num_copy(&r.d.n, n);
5700 }
5701 else {
5702 bc_array_init(&r.d.v, true);
5703 bc_array_copy(&r.d.v, (BcVec *) n);
5704 }
5705
5706 bc_vec_push(v, &r.d);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005707 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005708
Denys Vlasenko29301232018-12-11 15:29:32 +01005709 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005710}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005711#define zbc_program_copyToVar(...) (zbc_program_copyToVar(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005712
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005713static BC_STATUS zbc_program_assign(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005714{
5715 BcStatus s;
5716 BcResult *left, *right, res;
5717 BcNum *l = NULL, *r = NULL;
Gavin Howard01055ba2018-11-03 11:00:21 -06005718 bool assign = inst == BC_INST_ASSIGN, ib, sc;
5719
Denys Vlasenko29301232018-12-11 15:29:32 +01005720 s = zbc_program_binOpPrep(&left, &l, &right, &r, assign);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005721 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005722
5723 ib = left->t == BC_RESULT_IBASE;
5724 sc = left->t == BC_RESULT_SCALE;
5725
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005726#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06005727
5728 if (right->t == BC_RESULT_STR) {
5729
5730 BcVec *v;
5731
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005732 if (left->t != BC_RESULT_VAR)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005733 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenkodf515392018-12-02 19:27:48 +01005734 v = bc_program_search(left->d.id.name, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06005735
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005736 RETURN_STATUS(zbc_program_assignStr(right, v, false));
Gavin Howard01055ba2018-11-03 11:00:21 -06005737 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005738#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06005739
5740 if (left->t == BC_RESULT_CONSTANT || left->t == BC_RESULT_TEMP)
Denys Vlasenko259137d2018-12-11 19:42:05 +01005741 RETURN_STATUS(bc_error("bad assignment:"
Denys Vlasenko0154d782018-12-14 23:32:51 +01005742 " left side must be variable"
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005743 " or array element"
Denys Vlasenko0154d782018-12-14 23:32:51 +01005744 )); // note: shared string
Gavin Howard01055ba2018-11-03 11:00:21 -06005745
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005746#if ENABLE_BC
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005747 if (inst == BC_INST_ASSIGN_DIVIDE && !bc_num_cmp(r, &G.prog.zero))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005748 RETURN_STATUS(bc_error("divide by zero"));
Gavin Howard01055ba2018-11-03 11:00:21 -06005749
5750 if (assign)
5751 bc_num_copy(l, r);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005752 else {
5753 s = BC_STATUS_SUCCESS;
Denys Vlasenkoec603182018-12-17 10:34:02 +01005754 IF_ERROR_RETURN_POSSIBLE(s =) zbc_program_ops[inst - BC_INST_ASSIGN_POWER](l, r, l, G.prog.scale);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005755 }
5756 if (s) RETURN_STATUS(s);
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005757#else
Gavin Howard01055ba2018-11-03 11:00:21 -06005758 bc_num_copy(l, r);
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005759#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06005760
5761 if (ib || sc || left->t == BC_RESULT_OBASE) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005762 static const char *const msg[] = {
Denys Vlasenko64074a12018-12-07 15:50:14 +01005763 "bad ibase; must be [2,16]", //BC_RESULT_IBASE
5764 "bad scale; must be [0,"BC_MAX_SCALE_STR"]", //BC_RESULT_SCALE
5765 NULL, //can't happen //BC_RESULT_LAST
5766 NULL, //can't happen //BC_RESULT_CONSTANT
5767 NULL, //can't happen //BC_RESULT_ONE
5768 "bad obase; must be [2,"BC_MAX_OBASE_STR"]", //BC_RESULT_OBASE
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005769 };
Gavin Howard01055ba2018-11-03 11:00:21 -06005770 size_t *ptr;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005771 size_t max;
5772 unsigned long val;
Gavin Howard01055ba2018-11-03 11:00:21 -06005773
Denys Vlasenko29301232018-12-11 15:29:32 +01005774 s = zbc_num_ulong(l, &val);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005775 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005776 s = left->t - BC_RESULT_IBASE;
Gavin Howard01055ba2018-11-03 11:00:21 -06005777 if (sc) {
5778 max = BC_MAX_SCALE;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005779 ptr = &G.prog.scale;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005780 } else {
5781 if (val < 2)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005782 RETURN_STATUS(bc_error(msg[s]));
Gavin Howard01055ba2018-11-03 11:00:21 -06005783 max = ib ? BC_NUM_MAX_IBASE : BC_MAX_OBASE;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005784 ptr = ib ? &G.prog.ib_t : &G.prog.ob_t;
Gavin Howard01055ba2018-11-03 11:00:21 -06005785 }
5786
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005787 if (val > max)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005788 RETURN_STATUS(bc_error(msg[s]));
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005789 if (!sc && !ib)
5790 bc_num_copy(&G.prog.ob, l);
Gavin Howard01055ba2018-11-03 11:00:21 -06005791
5792 *ptr = (size_t) val;
5793 s = BC_STATUS_SUCCESS;
5794 }
5795
5796 bc_num_init(&res.d.n, l->len);
5797 bc_num_copy(&res.d.n, l);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005798 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005799
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005800 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005801}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005802#define zbc_program_assign(...) (zbc_program_assign(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005803
Denys Vlasenko416ce762018-12-02 20:57:17 +01005804#if !ENABLE_DC
5805#define bc_program_pushVar(code, bgn, pop, copy) \
5806 bc_program_pushVar(code, bgn)
5807// for bc, 'pop' and 'copy' are always false
5808#endif
Denys Vlasenkob402ff82018-12-11 15:45:15 +01005809static BC_STATUS bc_program_pushVar(char *code, size_t *bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06005810 bool pop, bool copy)
5811{
Gavin Howard01055ba2018-11-03 11:00:21 -06005812 BcResult r;
5813 char *name = bc_program_name(code, bgn);
Gavin Howard01055ba2018-11-03 11:00:21 -06005814
5815 r.t = BC_RESULT_VAR;
5816 r.d.id.name = name;
5817
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005818#if ENABLE_DC
Denys Vlasenko416ce762018-12-02 20:57:17 +01005819 {
5820 BcVec *v = bc_program_search(name, true);
5821 BcNum *num = bc_vec_top(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06005822
Denys Vlasenko416ce762018-12-02 20:57:17 +01005823 if (pop || copy) {
Gavin Howard01055ba2018-11-03 11:00:21 -06005824
Denys Vlasenko416ce762018-12-02 20:57:17 +01005825 if (!BC_PROG_STACK(v, 2 - copy)) {
5826 free(name);
Denys Vlasenkob402ff82018-12-11 15:45:15 +01005827 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenko416ce762018-12-02 20:57:17 +01005828 }
5829
Gavin Howard01055ba2018-11-03 11:00:21 -06005830 free(name);
Denys Vlasenko416ce762018-12-02 20:57:17 +01005831 name = NULL;
5832
5833 if (!BC_PROG_STR(num)) {
5834
5835 r.t = BC_RESULT_TEMP;
5836
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005837 bc_num_init_DEF_SIZE(&r.d.n);
Denys Vlasenko416ce762018-12-02 20:57:17 +01005838 bc_num_copy(&r.d.n, num);
5839 }
5840 else {
5841 r.t = BC_RESULT_STR;
5842 r.d.id.idx = num->rdx;
5843 }
5844
5845 if (!copy) bc_vec_pop(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06005846 }
Gavin Howard01055ba2018-11-03 11:00:21 -06005847 }
5848#endif // ENABLE_DC
5849
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005850 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005851
Denys Vlasenkob402ff82018-12-11 15:45:15 +01005852 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005853}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005854#define zbc_program_pushVar(...) (bc_program_pushVar(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005855
Denys Vlasenko29301232018-12-11 15:29:32 +01005856static BC_STATUS zbc_program_pushArray(char *code, size_t *bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06005857 char inst)
5858{
5859 BcStatus s = BC_STATUS_SUCCESS;
5860 BcResult r;
5861 BcNum *num;
5862
5863 r.d.id.name = bc_program_name(code, bgn);
5864
5865 if (inst == BC_INST_ARRAY) {
5866 r.t = BC_RESULT_ARRAY;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005867 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005868 }
5869 else {
5870
5871 BcResult *operand;
5872 unsigned long temp;
5873
Denys Vlasenko29301232018-12-11 15:29:32 +01005874 s = zbc_program_prep(&operand, &num);
Gavin Howard01055ba2018-11-03 11:00:21 -06005875 if (s) goto err;
Denys Vlasenko29301232018-12-11 15:29:32 +01005876 s = zbc_num_ulong(num, &temp);
Gavin Howard01055ba2018-11-03 11:00:21 -06005877 if (s) goto err;
5878
5879 if (temp > BC_MAX_DIM) {
Denys Vlasenko64074a12018-12-07 15:50:14 +01005880 s = bc_error("array too long; must be [1,"BC_MAX_DIM_STR"]");
Gavin Howard01055ba2018-11-03 11:00:21 -06005881 goto err;
5882 }
5883
5884 r.d.id.idx = (size_t) temp;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005885 bc_program_retire(&r, BC_RESULT_ARRAY_ELEM);
Gavin Howard01055ba2018-11-03 11:00:21 -06005886 }
5887
5888err:
5889 if (s) free(r.d.id.name);
Denys Vlasenko29301232018-12-11 15:29:32 +01005890 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005891}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005892#define zbc_program_pushArray(...) (zbc_program_pushArray(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005893
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005894#if ENABLE_BC
Denys Vlasenko29301232018-12-11 15:29:32 +01005895static BC_STATUS zbc_program_incdec(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005896{
5897 BcStatus s;
5898 BcResult *ptr, res, copy;
5899 BcNum *num = NULL;
5900 char inst2 = inst;
5901
Denys Vlasenko29301232018-12-11 15:29:32 +01005902 s = zbc_program_prep(&ptr, &num);
5903 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005904
5905 if (inst == BC_INST_INC_POST || inst == BC_INST_DEC_POST) {
5906 copy.t = BC_RESULT_TEMP;
5907 bc_num_init(&copy.d.n, num->len);
5908 bc_num_copy(&copy.d.n, num);
5909 }
5910
5911 res.t = BC_RESULT_ONE;
5912 inst = inst == BC_INST_INC_PRE || inst == BC_INST_INC_POST ?
5913 BC_INST_ASSIGN_PLUS :
5914 BC_INST_ASSIGN_MINUS;
5915
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005916 bc_vec_push(&G.prog.results, &res);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005917 s = zbc_program_assign(inst);
5918 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005919
5920 if (inst2 == BC_INST_INC_POST || inst2 == BC_INST_DEC_POST) {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005921 bc_vec_pop(&G.prog.results);
5922 bc_vec_push(&G.prog.results, &copy);
Gavin Howard01055ba2018-11-03 11:00:21 -06005923 }
5924
Denys Vlasenko29301232018-12-11 15:29:32 +01005925 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005926}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005927#define zbc_program_incdec(...) (zbc_program_incdec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005928
Denys Vlasenko29301232018-12-11 15:29:32 +01005929static BC_STATUS zbc_program_call(char *code, size_t *idx)
Gavin Howard01055ba2018-11-03 11:00:21 -06005930{
Gavin Howard01055ba2018-11-03 11:00:21 -06005931 BcInstPtr ip;
5932 size_t i, nparams = bc_program_index(code, idx);
5933 BcFunc *func;
Gavin Howard01055ba2018-11-03 11:00:21 -06005934 BcId *a;
5935 BcResultData param;
5936 BcResult *arg;
5937
5938 ip.idx = 0;
5939 ip.func = bc_program_index(code, idx);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005940 func = bc_program_func(ip.func);
Gavin Howard01055ba2018-11-03 11:00:21 -06005941
Denys Vlasenko04a1c762018-12-03 21:10:57 +01005942 if (func->code.len == 0) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005943 RETURN_STATUS(bc_error("undefined function"));
Denys Vlasenko04a1c762018-12-03 21:10:57 +01005944 }
5945 if (nparams != func->nparams) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005946 RETURN_STATUS(bc_error_fmt("function has %u parameters, but called with %u", func->nparams, nparams));
Denys Vlasenko04a1c762018-12-03 21:10:57 +01005947 }
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005948 ip.len = G.prog.results.len - nparams;
Gavin Howard01055ba2018-11-03 11:00:21 -06005949
5950 for (i = 0; i < nparams; ++i) {
Denys Vlasenko628bf1b2018-12-10 20:41:05 +01005951 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06005952
5953 a = bc_vec_item(&func->autos, nparams - 1 - i);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005954 arg = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005955
5956 if ((!a->idx) != (arg->t == BC_RESULT_ARRAY) || arg->t == BC_RESULT_STR)
Denys Vlasenko29301232018-12-11 15:29:32 +01005957 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06005958
Denys Vlasenko29301232018-12-11 15:29:32 +01005959 s = zbc_program_copyToVar(a->name, a->idx);
5960 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005961 }
5962
5963 for (; i < func->autos.len; ++i) {
Denys Vlasenkodf515392018-12-02 19:27:48 +01005964 BcVec *v;
Gavin Howard01055ba2018-11-03 11:00:21 -06005965
5966 a = bc_vec_item(&func->autos, i);
Denys Vlasenkodf515392018-12-02 19:27:48 +01005967 v = bc_program_search(a->name, a->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005968
5969 if (a->idx) {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005970 bc_num_init_DEF_SIZE(&param.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005971 bc_vec_push(v, &param.n);
5972 }
5973 else {
5974 bc_array_init(&param.v, true);
5975 bc_vec_push(v, &param.v);
5976 }
5977 }
5978
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005979 bc_vec_push(&G.prog.stack, &ip);
Gavin Howard01055ba2018-11-03 11:00:21 -06005980
Denys Vlasenko29301232018-12-11 15:29:32 +01005981 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005982}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005983#define zbc_program_call(...) (zbc_program_call(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005984
Denys Vlasenko29301232018-12-11 15:29:32 +01005985static BC_STATUS zbc_program_return(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005986{
Gavin Howard01055ba2018-11-03 11:00:21 -06005987 BcResult res;
5988 BcFunc *f;
5989 size_t i;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005990 BcInstPtr *ip = bc_vec_top(&G.prog.stack);
Gavin Howard01055ba2018-11-03 11:00:21 -06005991
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005992 if (!BC_PROG_STACK(&G.prog.results, ip->len + inst == BC_INST_RET))
Denys Vlasenko29301232018-12-11 15:29:32 +01005993 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005994
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005995 f = bc_program_func(ip->func);
Gavin Howard01055ba2018-11-03 11:00:21 -06005996 res.t = BC_RESULT_TEMP;
5997
5998 if (inst == BC_INST_RET) {
Denys Vlasenko628bf1b2018-12-10 20:41:05 +01005999 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06006000 BcNum *num;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006001 BcResult *operand = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006002
Denys Vlasenko29301232018-12-11 15:29:32 +01006003 s = zbc_program_num(operand, &num, false);
6004 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006005 bc_num_init(&res.d.n, num->len);
6006 bc_num_copy(&res.d.n, num);
6007 }
6008 else {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006009 bc_num_init_DEF_SIZE(&res.d.n);
Denys Vlasenko3129f702018-12-09 12:04:44 +01006010 //bc_num_zero(&res.d.n); - already is
Gavin Howard01055ba2018-11-03 11:00:21 -06006011 }
6012
6013 // We need to pop arguments as well, so this takes that into account.
6014 for (i = 0; i < f->autos.len; ++i) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006015 BcVec *v;
6016 BcId *a = bc_vec_item(&f->autos, i);
6017
Denys Vlasenkodf515392018-12-02 19:27:48 +01006018 v = bc_program_search(a->name, a->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006019 bc_vec_pop(v);
6020 }
6021
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006022 bc_vec_npop(&G.prog.results, G.prog.results.len - ip->len);
6023 bc_vec_push(&G.prog.results, &res);
6024 bc_vec_pop(&G.prog.stack);
Gavin Howard01055ba2018-11-03 11:00:21 -06006025
Denys Vlasenko29301232018-12-11 15:29:32 +01006026 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006027}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006028#define zbc_program_return(...) (zbc_program_return(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006029#endif // ENABLE_BC
6030
6031static unsigned long bc_program_scale(BcNum *n)
6032{
6033 return (unsigned long) n->rdx;
6034}
6035
6036static unsigned long bc_program_len(BcNum *n)
6037{
Denys Vlasenkoa7f1a362018-12-10 12:57:01 +01006038 size_t len = n->len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006039
Denys Vlasenkoa7f1a362018-12-10 12:57:01 +01006040 if (n->rdx != len) return len;
6041 for (;;) {
6042 if (len == 0) break;
6043 len--;
6044 if (n->num[len] != 0) break;
6045 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006046 return len;
6047}
6048
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006049static BC_STATUS zbc_program_builtin(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06006050{
6051 BcStatus s;
6052 BcResult *opnd;
6053 BcNum *num = NULL;
6054 BcResult res;
6055 bool len = inst == BC_INST_LENGTH;
6056
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006057 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006058 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006059 opnd = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006060
Denys Vlasenko29301232018-12-11 15:29:32 +01006061 s = zbc_program_num(opnd, &num, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006062 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006063
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006064#if ENABLE_DC
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006065 if (!BC_PROG_NUM(opnd, num) && !len)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006066 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006067#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06006068
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006069 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006070
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006071 if (inst == BC_INST_SQRT) s = zbc_num_sqrt(num, &res.d.n, G.prog.scale);
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006072#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -06006073 else if (len != 0 && opnd->t == BC_RESULT_ARRAY) {
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006074 bc_num_ulong2num(&res.d.n, (unsigned long) ((BcVec *) num)->len);
Gavin Howard01055ba2018-11-03 11:00:21 -06006075 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006076#endif
6077#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06006078 else if (len != 0 && !BC_PROG_NUM(opnd, num)) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006079 char **str;
6080 size_t idx = opnd->t == BC_RESULT_STR ? opnd->d.id.idx : num->rdx;
6081
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006082 str = bc_program_str(idx);
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006083 bc_num_ulong2num(&res.d.n, strlen(*str));
Gavin Howard01055ba2018-11-03 11:00:21 -06006084 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006085#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06006086 else {
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01006087 bc_num_ulong2num(&res.d.n, len ? bc_program_len(num) : bc_program_scale(num));
Gavin Howard01055ba2018-11-03 11:00:21 -06006088 }
6089
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006090 bc_program_retire(&res, BC_RESULT_TEMP);
Gavin Howard01055ba2018-11-03 11:00:21 -06006091
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006092 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006093}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006094#define zbc_program_builtin(...) (zbc_program_builtin(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006095
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006096#if ENABLE_DC
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006097static BC_STATUS zbc_program_divmod(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006098{
6099 BcStatus s;
6100 BcResult *opd1, *opd2, res, res2;
6101 BcNum *n1, *n2 = NULL;
6102
Denys Vlasenko29301232018-12-11 15:29:32 +01006103 s = zbc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006104 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006105
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006106 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006107 bc_num_init(&res2.d.n, n2->len);
6108
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006109 s = zbc_num_divmod(n1, n2, &res2.d.n, &res.d.n, G.prog.scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06006110 if (s) goto err;
6111
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006112 bc_program_binOpRetire(&res2);
Gavin Howard01055ba2018-11-03 11:00:21 -06006113 res.t = BC_RESULT_TEMP;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006114 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006115
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006116 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006117
6118err:
6119 bc_num_free(&res2.d.n);
6120 bc_num_free(&res.d.n);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006121 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006122}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006123#define zbc_program_divmod(...) (zbc_program_divmod(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006124
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006125static BC_STATUS zbc_program_modexp(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006126{
6127 BcStatus s;
6128 BcResult *r1, *r2, *r3, res;
6129 BcNum *n1, *n2, *n3;
6130
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006131 if (!BC_PROG_STACK(&G.prog.results, 3))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006132 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenko29301232018-12-11 15:29:32 +01006133 s = zbc_program_binOpPrep(&r2, &n2, &r3, &n3, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006134 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006135
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006136 r1 = bc_vec_item_rev(&G.prog.results, 2);
Denys Vlasenko29301232018-12-11 15:29:32 +01006137 s = zbc_program_num(r1, &n1, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006138 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006139 if (!BC_PROG_NUM(r1, n1))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006140 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06006141
6142 // Make sure that the values have their pointers updated, if necessary.
6143 if (r1->t == BC_RESULT_VAR || r1->t == BC_RESULT_ARRAY_ELEM) {
6144
6145 if (r1->t == r2->t) {
Denys Vlasenko29301232018-12-11 15:29:32 +01006146 s = zbc_program_num(r2, &n2, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006147 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006148 }
6149
6150 if (r1->t == r3->t) {
Denys Vlasenko29301232018-12-11 15:29:32 +01006151 s = zbc_program_num(r3, &n3, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006152 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006153 }
6154 }
6155
6156 bc_num_init(&res.d.n, n3->len);
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006157 s = zbc_num_modexp(n1, n2, n3, &res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006158 if (s) goto err;
6159
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006160 bc_vec_pop(&G.prog.results);
6161 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006162
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006163 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006164
6165err:
6166 bc_num_free(&res.d.n);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006167 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006168}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006169#define zbc_program_modexp(...) (zbc_program_modexp(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006170
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006171static void bc_program_stackLen(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006172{
Gavin Howard01055ba2018-11-03 11:00:21 -06006173 BcResult res;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006174 size_t len = G.prog.results.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006175
6176 res.t = BC_RESULT_TEMP;
6177
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006178 bc_num_init_DEF_SIZE(&res.d.n);
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006179 bc_num_ulong2num(&res.d.n, len);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006180 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006181}
6182
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006183static BC_STATUS zbc_program_asciify(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006184{
6185 BcStatus s;
6186 BcResult *r, res;
Denys Vlasenko4a024c72018-12-09 13:21:54 +01006187 BcNum *num, n;
Gavin Howard01055ba2018-11-03 11:00:21 -06006188 char *str, *str2, c;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006189 size_t len = G.prog.strs.len, idx;
Gavin Howard01055ba2018-11-03 11:00:21 -06006190 unsigned long val;
6191
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006192 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006193 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006194 r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006195
Denys Vlasenko4a024c72018-12-09 13:21:54 +01006196 num = NULL; // TODO: is this NULL needed?
Denys Vlasenko29301232018-12-11 15:29:32 +01006197 s = zbc_program_num(r, &num, false);
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006198 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006199
6200 if (BC_PROG_NUM(r, num)) {
6201
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006202 bc_num_init_DEF_SIZE(&n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006203 bc_num_copy(&n, num);
6204 bc_num_truncate(&n, n.rdx);
6205
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006206 s = zbc_num_mod(&n, &G.prog.strmb, &n, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06006207 if (s) goto num_err;
Denys Vlasenko29301232018-12-11 15:29:32 +01006208 s = zbc_num_ulong(&n, &val);
Gavin Howard01055ba2018-11-03 11:00:21 -06006209 if (s) goto num_err;
6210
6211 c = (char) val;
6212
6213 bc_num_free(&n);
6214 }
6215 else {
6216 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006217 str2 = *bc_program_str(idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006218 c = str2[0];
6219 }
6220
Denys Vlasenkofa35e592018-12-10 20:17:24 +01006221 str = xzalloc(2);
Gavin Howard01055ba2018-11-03 11:00:21 -06006222 str[0] = c;
Denys Vlasenkofa35e592018-12-10 20:17:24 +01006223 //str[1] = '\0'; - already is
Gavin Howard01055ba2018-11-03 11:00:21 -06006224
6225 str2 = xstrdup(str);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006226 bc_program_addFunc(str2, &idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006227
6228 if (idx != len + BC_PROG_REQ_FUNCS) {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006229 for (idx = 0; idx < G.prog.strs.len; ++idx) {
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006230 if (strcmp(*bc_program_str(idx), str) == 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006231 len = idx;
6232 break;
6233 }
6234 }
6235
6236 free(str);
6237 }
6238 else
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006239 bc_vec_push(&G.prog.strs, &str);
Gavin Howard01055ba2018-11-03 11:00:21 -06006240
6241 res.t = BC_RESULT_STR;
6242 res.d.id.idx = len;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006243 bc_vec_pop(&G.prog.results);
6244 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006245
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006246 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006247
6248num_err:
6249 bc_num_free(&n);
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006250 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006251}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006252#define zbc_program_asciify(...) (zbc_program_asciify(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006253
Denys Vlasenko29301232018-12-11 15:29:32 +01006254static BC_STATUS zbc_program_printStream(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006255{
6256 BcStatus s;
6257 BcResult *r;
6258 BcNum *n = NULL;
6259 size_t idx;
6260 char *str;
6261
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006262 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01006263 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006264 r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006265
Denys Vlasenko29301232018-12-11 15:29:32 +01006266 s = zbc_program_num(r, &n, false);
6267 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006268
Denys Vlasenko57734c92018-12-17 21:14:05 +01006269 if (BC_PROG_NUM(r, n)) {
6270 s = zbc_num_printNum(n, &G.prog.strmb, 1, bc_num_printChar);
6271 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06006272 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : n->rdx;
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006273 str = *bc_program_str(idx);
Denys Vlasenko00d77792018-11-30 23:13:42 +01006274 printf("%s", str);
Gavin Howard01055ba2018-11-03 11:00:21 -06006275 }
6276
Denys Vlasenko29301232018-12-11 15:29:32 +01006277 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006278}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006279#define zbc_program_printStream(...) (zbc_program_printStream(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006280
Denys Vlasenko29301232018-12-11 15:29:32 +01006281static BC_STATUS zbc_program_nquit(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006282{
6283 BcStatus s;
6284 BcResult *opnd;
6285 BcNum *num = NULL;
6286 unsigned long val;
6287
Denys Vlasenko29301232018-12-11 15:29:32 +01006288 s = zbc_program_prep(&opnd, &num);
6289 if (s) RETURN_STATUS(s);
6290 s = zbc_num_ulong(num, &val);
6291 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006292
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006293 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006294
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006295 if (G.prog.stack.len < val)
Denys Vlasenko29301232018-12-11 15:29:32 +01006296 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01006297 if (G.prog.stack.len == val) {
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01006298 QUIT_OR_RETURN_TO_MAIN;
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01006299 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006300
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006301 bc_vec_npop(&G.prog.stack, val);
Gavin Howard01055ba2018-11-03 11:00:21 -06006302
Denys Vlasenko29301232018-12-11 15:29:32 +01006303 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006304}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006305#define zbc_program_nquit(...) (zbc_program_nquit(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006306
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006307static BC_STATUS zbc_program_execStr(char *code, size_t *bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06006308 bool cond)
6309{
6310 BcStatus s = BC_STATUS_SUCCESS;
6311 BcResult *r;
6312 char **str;
6313 BcFunc *f;
6314 BcParse prs;
6315 BcInstPtr ip;
6316 size_t fidx, sidx;
Gavin Howard01055ba2018-11-03 11:00:21 -06006317
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006318 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006319 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06006320
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006321 r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006322
6323 if (cond) {
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006324 BcNum *n = n; // for compiler
6325 bool exec;
6326 char *name;
6327 char *then_name = bc_program_name(code, bgn);
6328 char *else_name = NULL;
Gavin Howard01055ba2018-11-03 11:00:21 -06006329
6330 if (code[*bgn] == BC_PARSE_STREND)
6331 (*bgn) += 1;
6332 else
6333 else_name = bc_program_name(code, bgn);
6334
6335 exec = r->d.n.len != 0;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006336 name = then_name;
6337 if (!exec && else_name != NULL) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006338 exec = true;
6339 name = else_name;
6340 }
6341
6342 if (exec) {
Denys Vlasenkodf515392018-12-02 19:27:48 +01006343 BcVec *v;
6344 v = bc_program_search(name, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06006345 n = bc_vec_top(v);
6346 }
6347
6348 free(then_name);
6349 free(else_name);
6350
6351 if (!exec) goto exit;
6352 if (!BC_PROG_STR(n)) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01006353 s = bc_error_variable_is_wrong_type();
Gavin Howard01055ba2018-11-03 11:00:21 -06006354 goto exit;
6355 }
6356
6357 sidx = n->rdx;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006358 } else {
6359 if (r->t == BC_RESULT_STR) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006360 sidx = r->d.id.idx;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006361 } else if (r->t == BC_RESULT_VAR) {
6362 BcNum *n;
Denys Vlasenko29301232018-12-11 15:29:32 +01006363 s = zbc_program_num(r, &n, false);
Gavin Howard01055ba2018-11-03 11:00:21 -06006364 if (s || !BC_PROG_STR(n)) goto exit;
6365 sidx = n->rdx;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006366 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06006367 goto exit;
6368 }
6369
6370 fidx = sidx + BC_PROG_REQ_FUNCS;
6371
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006372 str = bc_program_str(sidx);
6373 f = bc_program_func(fidx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006374
6375 if (f->code.len == 0) {
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01006376 bc_parse_create(&prs, fidx);
Denys Vlasenkof86e9602018-12-14 17:01:56 +01006377 s = zbc_parse_text_init(&prs, *str);
Gavin Howard01055ba2018-11-03 11:00:21 -06006378 if (s) goto err;
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01006379 s = zcommon_parse_expr(&prs, BC_PARSE_NOCALL);
Gavin Howard01055ba2018-11-03 11:00:21 -06006380 if (s) goto err;
6381
6382 if (prs.l.t.t != BC_LEX_EOF) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01006383 s = bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06006384 goto err;
6385 }
6386
6387 bc_parse_free(&prs);
6388 }
6389
6390 ip.idx = 0;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006391 ip.len = G.prog.results.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006392 ip.func = fidx;
6393
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006394 bc_vec_pop(&G.prog.results);
6395 bc_vec_push(&G.prog.stack, &ip);
Gavin Howard01055ba2018-11-03 11:00:21 -06006396
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006397 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006398
6399err:
6400 bc_parse_free(&prs);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006401 f = bc_program_func(fidx);
Denys Vlasenko7d628012018-12-04 21:46:47 +01006402 bc_vec_pop_all(&f->code);
Gavin Howard01055ba2018-11-03 11:00:21 -06006403exit:
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006404 bc_vec_pop(&G.prog.results);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006405 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006406}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006407#define zbc_program_execStr(...) (zbc_program_execStr(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006408#endif // ENABLE_DC
6409
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006410static void bc_program_pushGlobal(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06006411{
Gavin Howard01055ba2018-11-03 11:00:21 -06006412 BcResult res;
6413 unsigned long val;
6414
6415 res.t = inst - BC_INST_IBASE + BC_RESULT_IBASE;
6416 if (inst == BC_INST_IBASE)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006417 val = (unsigned long) G.prog.ib_t;
Gavin Howard01055ba2018-11-03 11:00:21 -06006418 else if (inst == BC_INST_SCALE)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006419 val = (unsigned long) G.prog.scale;
Gavin Howard01055ba2018-11-03 11:00:21 -06006420 else
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006421 val = (unsigned long) G.prog.ob_t;
Gavin Howard01055ba2018-11-03 11:00:21 -06006422
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006423 bc_num_init_DEF_SIZE(&res.d.n);
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006424 bc_num_ulong2num(&res.d.n, val);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006425 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006426}
6427
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006428static void bc_program_addFunc(char *name, size_t *idx)
Gavin Howard01055ba2018-11-03 11:00:21 -06006429{
Gavin Howard01055ba2018-11-03 11:00:21 -06006430 BcId entry, *entry_ptr;
6431 BcFunc f;
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01006432 int inserted;
Gavin Howard01055ba2018-11-03 11:00:21 -06006433
6434 entry.name = name;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006435 entry.idx = G.prog.fns.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006436
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01006437 inserted = bc_map_insert(&G.prog.fn_map, &entry, idx);
6438 if (!inserted) free(name);
Gavin Howard01055ba2018-11-03 11:00:21 -06006439
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006440 entry_ptr = bc_vec_item(&G.prog.fn_map, *idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006441 *idx = entry_ptr->idx;
6442
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01006443 if (!inserted) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006444
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006445 BcFunc *func = bc_program_func(entry_ptr->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006446
6447 // We need to reset these, so the function can be repopulated.
6448 func->nparams = 0;
Denys Vlasenko7d628012018-12-04 21:46:47 +01006449 bc_vec_pop_all(&func->autos);
6450 bc_vec_pop_all(&func->code);
6451 bc_vec_pop_all(&func->labels);
Gavin Howard01055ba2018-11-03 11:00:21 -06006452 }
6453 else {
6454 bc_func_init(&f);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006455 bc_vec_push(&G.prog.fns, &f);
Gavin Howard01055ba2018-11-03 11:00:21 -06006456 }
6457}
6458
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006459static BC_STATUS zbc_program_exec(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006460{
Gavin Howard01055ba2018-11-03 11:00:21 -06006461 BcResult r, *ptr;
6462 BcNum *num;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006463 BcInstPtr *ip = bc_vec_top(&G.prog.stack);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006464 BcFunc *func = bc_program_func(ip->func);
Gavin Howard01055ba2018-11-03 11:00:21 -06006465 char *code = func->code.v;
Gavin Howard01055ba2018-11-03 11:00:21 -06006466
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006467 while (ip->idx < func->code.len) {
Denys Vlasenkofa35e592018-12-10 20:17:24 +01006468 BcStatus s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06006469 char inst = code[(ip->idx)++];
6470
Denys Vlasenko99b37622018-12-15 20:06:59 +01006471 dbg_exec("inst:%d", inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006472 switch (inst) {
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006473#if ENABLE_BC
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006474 case BC_INST_JUMP_ZERO: {
6475 bool zero;
Denys Vlasenko99b37622018-12-15 20:06:59 +01006476 dbg_exec("BC_INST_JUMP_ZERO:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006477 s = zbc_program_prep(&ptr, &num);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006478 if (s) RETURN_STATUS(s);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006479 zero = (bc_num_cmp(num, &G.prog.zero) == 0);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006480 bc_vec_pop(&G.prog.results);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006481 if (!zero) {
6482 bc_program_index(code, &ip->idx);
6483 break;
6484 }
6485 // else: fall through
6486 }
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006487 case BC_INST_JUMP: {
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006488 size_t idx = bc_program_index(code, &ip->idx);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006489 size_t *addr = bc_vec_item(&func->labels, idx);
Denys Vlasenko99b37622018-12-15 20:06:59 +01006490 dbg_exec("BC_INST_JUMP: to %ld", (long)*addr);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006491 ip->idx = *addr;
Gavin Howard01055ba2018-11-03 11:00:21 -06006492 break;
6493 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006494 case BC_INST_CALL:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006495 dbg_exec("BC_INST_CALL:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006496 s = zbc_program_call(code, &ip->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006497 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006498 case BC_INST_INC_PRE:
6499 case BC_INST_DEC_PRE:
6500 case BC_INST_INC_POST:
6501 case BC_INST_DEC_POST:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006502 dbg_exec("BC_INST_INCDEC:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006503 s = zbc_program_incdec(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006504 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006505 case BC_INST_HALT:
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006506 dbg_exec("BC_INST_HALT:");
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01006507 QUIT_OR_RETURN_TO_MAIN;
Gavin Howard01055ba2018-11-03 11:00:21 -06006508 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006509 case BC_INST_RET:
6510 case BC_INST_RET0:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006511 dbg_exec("BC_INST_RET[0]:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006512 s = zbc_program_return(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006513 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006514 case BC_INST_BOOL_OR:
6515 case BC_INST_BOOL_AND:
6516#endif // ENABLE_BC
6517 case BC_INST_REL_EQ:
6518 case BC_INST_REL_LE:
6519 case BC_INST_REL_GE:
6520 case BC_INST_REL_NE:
6521 case BC_INST_REL_LT:
6522 case BC_INST_REL_GT:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006523 dbg_exec("BC_INST_BOOL:");
Denys Vlasenko728e7c92018-12-11 19:37:00 +01006524 s = zbc_program_logical(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006525 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006526 case BC_INST_READ:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006527 dbg_exec("BC_INST_READ:");
Denys Vlasenko26819db2018-12-12 16:08:46 +01006528 s = zbc_program_read();
Gavin Howard01055ba2018-11-03 11:00:21 -06006529 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006530 case BC_INST_VAR:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006531 dbg_exec("BC_INST_VAR:");
Denys Vlasenkob402ff82018-12-11 15:45:15 +01006532 s = zbc_program_pushVar(code, &ip->idx, false, false);
Gavin Howard01055ba2018-11-03 11:00:21 -06006533 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006534 case BC_INST_ARRAY_ELEM:
6535 case BC_INST_ARRAY:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006536 dbg_exec("BC_INST_ARRAY[_ELEM]:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006537 s = zbc_program_pushArray(code, &ip->idx, inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006538 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006539 case BC_INST_LAST:
Gavin Howard01055ba2018-11-03 11:00:21 -06006540 r.t = BC_RESULT_LAST;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006541 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006542 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006543 case BC_INST_IBASE:
6544 case BC_INST_SCALE:
6545 case BC_INST_OBASE:
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006546 bc_program_pushGlobal(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006547 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006548 case BC_INST_SCALE_FUNC:
6549 case BC_INST_LENGTH:
6550 case BC_INST_SQRT:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006551 dbg_exec("BC_INST_builtin:");
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006552 s = zbc_program_builtin(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006553 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006554 case BC_INST_NUM:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006555 dbg_exec("BC_INST_NUM:");
Gavin Howard01055ba2018-11-03 11:00:21 -06006556 r.t = BC_RESULT_CONSTANT;
6557 r.d.id.idx = bc_program_index(code, &ip->idx);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006558 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006559 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006560 case BC_INST_POP:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006561 dbg_exec("BC_INST_POP:");
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006562 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01006563 s = bc_error_stack_has_too_few_elements();
Gavin Howard01055ba2018-11-03 11:00:21 -06006564 else
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006565 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006566 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006567 case BC_INST_POP_EXEC:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006568 dbg_exec("BC_INST_POP_EXEC:");
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006569 bc_vec_pop(&G.prog.stack);
Gavin Howard01055ba2018-11-03 11:00:21 -06006570 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006571 case BC_INST_PRINT:
6572 case BC_INST_PRINT_POP:
6573 case BC_INST_PRINT_STR:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006574 dbg_exec("BC_INST_PRINTxyz:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006575 s = zbc_program_print(inst, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06006576 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006577 case BC_INST_STR:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006578 dbg_exec("BC_INST_STR:");
Gavin Howard01055ba2018-11-03 11:00:21 -06006579 r.t = BC_RESULT_STR;
6580 r.d.id.idx = bc_program_index(code, &ip->idx);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006581 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006582 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006583 case BC_INST_POWER:
6584 case BC_INST_MULTIPLY:
6585 case BC_INST_DIVIDE:
6586 case BC_INST_MODULUS:
6587 case BC_INST_PLUS:
6588 case BC_INST_MINUS:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006589 dbg_exec("BC_INST_binaryop:");
Denys Vlasenko259137d2018-12-11 19:42:05 +01006590 s = zbc_program_op(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006591 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006592 case BC_INST_BOOL_NOT:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006593 dbg_exec("BC_INST_BOOL_NOT:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006594 s = zbc_program_prep(&ptr, &num);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006595 if (s) RETURN_STATUS(s);
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006596 bc_num_init_DEF_SIZE(&r.d.n);
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006597 if (!bc_num_cmp(num, &G.prog.zero))
6598 bc_num_one(&r.d.n);
Denys Vlasenko3129f702018-12-09 12:04:44 +01006599 //else bc_num_zero(&r.d.n); - already is
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006600 bc_program_retire(&r, BC_RESULT_TEMP);
Gavin Howard01055ba2018-11-03 11:00:21 -06006601 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006602 case BC_INST_NEG:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006603 dbg_exec("BC_INST_NEG:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006604 s = zbc_program_negate();
Gavin Howard01055ba2018-11-03 11:00:21 -06006605 break;
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006606#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -06006607 case BC_INST_ASSIGN_POWER:
6608 case BC_INST_ASSIGN_MULTIPLY:
6609 case BC_INST_ASSIGN_DIVIDE:
6610 case BC_INST_ASSIGN_MODULUS:
6611 case BC_INST_ASSIGN_PLUS:
6612 case BC_INST_ASSIGN_MINUS:
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006613#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06006614 case BC_INST_ASSIGN:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006615 dbg_exec("BC_INST_ASSIGNxyz:");
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006616 s = zbc_program_assign(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006617 break;
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006618#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06006619 case BC_INST_MODEXP:
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006620 s = zbc_program_modexp();
Gavin Howard01055ba2018-11-03 11:00:21 -06006621 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006622 case BC_INST_DIVMOD:
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006623 s = zbc_program_divmod();
Gavin Howard01055ba2018-11-03 11:00:21 -06006624 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006625 case BC_INST_EXECUTE:
6626 case BC_INST_EXEC_COND:
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006627 s = zbc_program_execStr(code, &ip->idx, inst == BC_INST_EXEC_COND);
Gavin Howard01055ba2018-11-03 11:00:21 -06006628 break;
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006629 case BC_INST_PRINT_STACK: {
6630 size_t idx;
6631 for (idx = 0; idx < G.prog.results.len; ++idx) {
Denys Vlasenko29301232018-12-11 15:29:32 +01006632 s = zbc_program_print(BC_INST_PRINT, idx);
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006633 if (s) break;
6634 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006635 break;
6636 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006637 case BC_INST_CLEAR_STACK:
Denys Vlasenko7d628012018-12-04 21:46:47 +01006638 bc_vec_pop_all(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006639 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006640 case BC_INST_STACK_LEN:
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006641 bc_program_stackLen();
Gavin Howard01055ba2018-11-03 11:00:21 -06006642 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006643 case BC_INST_DUPLICATE:
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006644 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006645 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006646 ptr = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006647 bc_result_copy(&r, ptr);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006648 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006649 break;
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006650 case BC_INST_SWAP: {
Gavin Howard01055ba2018-11-03 11:00:21 -06006651 BcResult *ptr2;
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006652 if (!BC_PROG_STACK(&G.prog.results, 2))
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006653 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006654 ptr = bc_vec_item_rev(&G.prog.results, 0);
6655 ptr2 = bc_vec_item_rev(&G.prog.results, 1);
Gavin Howard01055ba2018-11-03 11:00:21 -06006656 memcpy(&r, ptr, sizeof(BcResult));
6657 memcpy(ptr, ptr2, sizeof(BcResult));
6658 memcpy(ptr2, &r, sizeof(BcResult));
Gavin Howard01055ba2018-11-03 11:00:21 -06006659 break;
6660 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006661 case BC_INST_ASCIIFY:
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006662 s = zbc_program_asciify();
Gavin Howard01055ba2018-11-03 11:00:21 -06006663 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006664 case BC_INST_PRINT_STREAM:
Denys Vlasenko29301232018-12-11 15:29:32 +01006665 s = zbc_program_printStream();
Gavin Howard01055ba2018-11-03 11:00:21 -06006666 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006667 case BC_INST_LOAD:
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006668 case BC_INST_PUSH_VAR: {
Gavin Howard01055ba2018-11-03 11:00:21 -06006669 bool copy = inst == BC_INST_LOAD;
Denys Vlasenkob402ff82018-12-11 15:45:15 +01006670 s = zbc_program_pushVar(code, &ip->idx, true, copy);
Gavin Howard01055ba2018-11-03 11:00:21 -06006671 break;
6672 }
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006673 case BC_INST_PUSH_TO_VAR: {
Gavin Howard01055ba2018-11-03 11:00:21 -06006674 char *name = bc_program_name(code, &ip->idx);
Denys Vlasenko29301232018-12-11 15:29:32 +01006675 s = zbc_program_copyToVar(name, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06006676 free(name);
6677 break;
6678 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006679 case BC_INST_QUIT:
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006680 dbg_exec("BC_INST_NEG:");
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006681 if (G.prog.stack.len <= 2)
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01006682 QUIT_OR_RETURN_TO_MAIN;
Denys Vlasenkocfdc1332018-12-03 14:02:35 +01006683 bc_vec_npop(&G.prog.stack, 2);
Gavin Howard01055ba2018-11-03 11:00:21 -06006684 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006685 case BC_INST_NQUIT:
Denys Vlasenko29301232018-12-11 15:29:32 +01006686 s = zbc_program_nquit();
Gavin Howard01055ba2018-11-03 11:00:21 -06006687 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006688#endif // ENABLE_DC
6689 }
6690
Denys Vlasenkod38af482018-12-04 19:11:02 +01006691 if (s || G_interrupt) {
6692 bc_program_reset();
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006693 RETURN_STATUS(s);
Denys Vlasenkod38af482018-12-04 19:11:02 +01006694 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006695
Denys Vlasenkoc5774a32018-12-17 01:22:53 +01006696 fflush_and_check();
6697
Gavin Howard01055ba2018-11-03 11:00:21 -06006698 // If the stack has changed, pointers may be invalid.
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006699 ip = bc_vec_top(&G.prog.stack);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006700 func = bc_program_func(ip->func);
Gavin Howard01055ba2018-11-03 11:00:21 -06006701 code = func->code.v;
6702 }
6703
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006704 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006705}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006706#define zbc_program_exec(...) (zbc_program_exec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006707
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006708static unsigned bc_vm_envLen(const char *var)
Gavin Howard01055ba2018-11-03 11:00:21 -06006709{
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006710 char *lenv;
6711 unsigned len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006712
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006713 lenv = getenv(var);
6714 len = BC_NUM_PRINT_WIDTH;
Gavin Howard01055ba2018-11-03 11:00:21 -06006715 if (!lenv) return len;
6716
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006717 len = bb_strtou(lenv, NULL, 10) - 1;
6718 if (errno || len < 2 || len >= INT_MAX)
Gavin Howard01055ba2018-11-03 11:00:21 -06006719 len = BC_NUM_PRINT_WIDTH;
6720
6721 return len;
6722}
6723
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006724static BC_STATUS zbc_vm_process(const char *text)
Gavin Howard01055ba2018-11-03 11:00:21 -06006725{
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006726 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06006727
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006728 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
6729 s = zbc_parse_text_init(&G.prs, text);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006730 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006731
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01006732 while (G.prs.l.t.t != BC_LEX_EOF) {
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006733 dbg_lex("%s:%d G.prs.l.t.t:%d", __func__, __LINE__, G.prs.l.t.t);
Denys Vlasenkoec603182018-12-17 10:34:02 +01006734 s = zcommon_parse(&G.prs);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006735 if (s) RETURN_STATUS(s);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006736 s = zbc_program_exec();
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006737 if (s) {
Denys Vlasenkod38af482018-12-04 19:11:02 +01006738 bc_program_reset();
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006739 break;
6740 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006741 }
6742
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006743 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006744 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006745}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006746#define zbc_vm_process(...) (zbc_vm_process(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006747
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006748static BC_STATUS zbc_vm_execute_FILE(FILE *fp, const char *filename)
Gavin Howard01055ba2018-11-03 11:00:21 -06006749{
Denys Vlasenko0fe270e2018-12-13 19:58:58 +01006750 // So far bc/dc have no way to include a file from another file,
6751 // therefore we know G.prog.file == NULL on entry
6752 //const char *sv_file;
Denys Vlasenko0409ad32018-12-05 16:39:22 +01006753 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06006754
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006755 G.prog.file = filename;
6756 G.input_fp = fp;
Denys Vlasenko0409ad32018-12-05 16:39:22 +01006757 bc_lex_file(&G.prs.l);
Gavin Howard01055ba2018-11-03 11:00:21 -06006758
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006759 do {
6760 s = zbc_vm_process("");
6761 // We do not stop looping on errors here if reading stdin.
6762 // Example: start interactive bc and enter "return".
6763 // It should say "'return' not in a function"
6764 // but should not exit.
6765 } while (G.input_fp == stdin);
Denys Vlasenko0fe270e2018-12-13 19:58:58 +01006766 G.prog.file = NULL;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006767 RETURN_STATUS(s);
6768}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006769#define zbc_vm_execute_FILE(...) (zbc_vm_execute_FILE(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006770
6771static BC_STATUS zbc_vm_file(const char *file)
6772{
6773 BcStatus s;
6774 FILE *fp;
6775
6776 fp = xfopen_for_read(file);
6777 s = zbc_vm_execute_FILE(fp, file);
6778 fclose(fp);
6779
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006780 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006781}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006782#define zbc_vm_file(...) (zbc_vm_file(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006783
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006784#if ENABLE_BC
Denys Vlasenko57b69182018-12-14 00:12:13 +01006785static void bc_vm_info(void)
6786{
6787 printf("%s "BB_VER"\n"
6788 "Copyright (c) 2018 Gavin D. Howard and contributors\n"
6789 , applet_name);
6790}
6791
6792static void bc_args(char **argv)
6793{
6794 unsigned opts;
6795 int i;
6796
6797 GETOPT_RESET();
6798#if ENABLE_FEATURE_BC_LONG_OPTIONS
6799 opts = option_mask32 |= getopt32long(argv, "wvsqli",
6800 "warn\0" No_argument "w"
6801 "version\0" No_argument "v"
6802 "standard\0" No_argument "s"
6803 "quiet\0" No_argument "q"
6804 "mathlib\0" No_argument "l"
6805 "interactive\0" No_argument "i"
6806 );
6807#else
6808 opts = option_mask32 |= getopt32(argv, "wvsqli");
6809#endif
6810 if (getenv("POSIXLY_CORRECT"))
6811 option_mask32 |= BC_FLAG_S;
6812
6813 if (opts & BC_FLAG_V) {
6814 bc_vm_info();
6815 exit(0);
6816 }
6817
6818 for (i = optind; argv[i]; ++i)
6819 bc_vec_push(&G.files, argv + i);
6820}
6821
6822static void bc_vm_envArgs(void)
6823{
6824 BcVec v;
6825 char *buf;
6826 char *env_args = getenv("BC_ENV_ARGS");
6827
6828 if (!env_args) return;
6829
6830 G.env_args = xstrdup(env_args);
6831 buf = G.env_args;
6832
6833 bc_vec_init(&v, sizeof(char *), NULL);
6834
6835 while (*(buf = skip_whitespace(buf)) != '\0') {
6836 bc_vec_push(&v, &buf);
6837 buf = skip_non_whitespace(buf);
6838 if (!*buf)
6839 break;
6840 *buf++ = '\0';
6841 }
6842
6843 // NULL terminate, and pass argv[] so that first arg is argv[1]
6844 if (sizeof(int) == sizeof(char*)) {
6845 bc_vec_push(&v, &const_int_0);
6846 } else {
6847 static char *const nullptr = NULL;
6848 bc_vec_push(&v, &nullptr);
6849 }
6850 bc_args(((char **)v.v) - 1);
6851
6852 bc_vec_free(&v);
6853}
6854
6855static const char bc_lib[] ALIGN1 = {
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006856 "scale=20"
6857"\n" "define e(x){"
6858"\n" "auto b,s,n,r,d,i,p,f,v"
Denys Vlasenko203210e2018-12-14 09:53:50 +01006859////////////////"if(x<0)return(1/e(-x))" // and drop 'n' and x<0 logic below
6860//^^^^^^^^^^^^^^^^ this would work, and is even more precise than GNU bc:
6861//e(-.998896): GNU:.36828580434569428695
6862// above code:.36828580434569428696
6863// actual value:.3682858043456942869594...
6864// but for now let's be "GNU compatible"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006865"\n" "b=ibase"
6866"\n" "ibase=A"
6867"\n" "if(x<0){"
6868"\n" "n=1"
6869"\n" "x=-x"
6870"\n" "}"
6871"\n" "s=scale"
Denys Vlasenko146a79d2018-12-16 21:46:11 +01006872"\n" "r=6+s+.44*x"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006873"\n" "scale=scale(x)+1"
6874"\n" "while(x>1){"
6875"\n" "d+=1"
6876"\n" "x/=2"
6877"\n" "scale+=1"
6878"\n" "}"
6879"\n" "scale=r"
6880"\n" "r=x+1"
6881"\n" "p=x"
6882"\n" "f=v=1"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006883"\n" "for(i=2;v;++i){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006884"\n" "p*=x"
6885"\n" "f*=i"
6886"\n" "v=p/f"
6887"\n" "r+=v"
6888"\n" "}"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006889"\n" "while(d--)r*=r"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006890"\n" "scale=s"
6891"\n" "ibase=b"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006892"\n" "if(n)return(1/r)"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006893"\n" "return(r/1)"
6894"\n" "}"
6895"\n" "define l(x){"
6896"\n" "auto b,s,r,p,a,q,i,v"
6897"\n" "b=ibase"
6898"\n" "ibase=A"
6899"\n" "if(x<=0){"
6900"\n" "r=(1-10^scale)/1"
6901"\n" "ibase=b"
6902"\n" "return(r)"
6903"\n" "}"
6904"\n" "s=scale"
6905"\n" "scale+=6"
6906"\n" "p=2"
6907"\n" "while(x>=2){"
6908"\n" "p*=2"
6909"\n" "x=sqrt(x)"
6910"\n" "}"
Denys Vlasenko146a79d2018-12-16 21:46:11 +01006911"\n" "while(x<=.5){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006912"\n" "p*=2"
6913"\n" "x=sqrt(x)"
6914"\n" "}"
6915"\n" "r=a=(x-1)/(x+1)"
6916"\n" "q=a*a"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006917"\n" "v=1"
6918"\n" "for(i=3;v;i+=2){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006919"\n" "a*=q"
6920"\n" "v=a/i"
6921"\n" "r+=v"
6922"\n" "}"
6923"\n" "r*=p"
6924"\n" "scale=s"
6925"\n" "ibase=b"
6926"\n" "return(r/1)"
6927"\n" "}"
6928"\n" "define s(x){"
Denys Vlasenko240d7ee2018-12-14 11:27:09 +01006929"\n" "auto b,s,r,a,q,i"
6930"\n" "if(x<0)return(-s(-x))"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006931"\n" "b=ibase"
6932"\n" "ibase=A"
6933"\n" "s=scale"
6934"\n" "scale=1.1*s+2"
6935"\n" "a=a(1)"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006936"\n" "scale=0"
6937"\n" "q=(x/a+2)/4"
Denys Vlasenko203210e2018-12-14 09:53:50 +01006938"\n" "x-=4*q*a"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006939"\n" "if(q%2)x=-x"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006940"\n" "scale=s+2"
6941"\n" "r=a=x"
6942"\n" "q=-x*x"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006943"\n" "for(i=3;a;i+=2){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006944"\n" "a*=q/(i*(i-1))"
6945"\n" "r+=a"
6946"\n" "}"
6947"\n" "scale=s"
6948"\n" "ibase=b"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006949"\n" "return(r/1)"
6950"\n" "}"
6951"\n" "define c(x){"
6952"\n" "auto b,s"
6953"\n" "b=ibase"
6954"\n" "ibase=A"
6955"\n" "s=scale"
6956"\n" "scale*=1.2"
6957"\n" "x=s(2*a(1)+x)"
6958"\n" "scale=s"
6959"\n" "ibase=b"
6960"\n" "return(x/1)"
6961"\n" "}"
6962"\n" "define a(x){"
6963"\n" "auto b,s,r,n,a,m,t,f,i,u"
6964"\n" "b=ibase"
6965"\n" "ibase=A"
6966"\n" "n=1"
6967"\n" "if(x<0){"
6968"\n" "n=-1"
6969"\n" "x=-x"
6970"\n" "}"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006971"\n" "if(scale<65){"
6972"\n" "if(x==1)return(.7853981633974483096156608458198757210492923498437764552437361480/n)"
6973"\n" "if(x==.2)return(.1973955598498807583700497651947902934475851037878521015176889402/n)"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006974"\n" "}"
6975"\n" "s=scale"
6976"\n" "if(x>.2){"
6977"\n" "scale+=5"
6978"\n" "a=a(.2)"
6979"\n" "}"
6980"\n" "scale=s+3"
6981"\n" "while(x>.2){"
6982"\n" "m+=1"
6983"\n" "x=(x-.2)/(1+.2*x)"
6984"\n" "}"
6985"\n" "r=u=x"
6986"\n" "f=-x*x"
6987"\n" "t=1"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006988"\n" "for(i=3;t;i+=2){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006989"\n" "u*=f"
6990"\n" "t=u/i"
6991"\n" "r+=t"
6992"\n" "}"
6993"\n" "scale=s"
6994"\n" "ibase=b"
6995"\n" "return((m*a+r)/n)"
6996"\n" "}"
6997"\n" "define j(n,x){"
6998"\n" "auto b,s,o,a,i,v,f"
6999"\n" "b=ibase"
7000"\n" "ibase=A"
7001"\n" "s=scale"
7002"\n" "scale=0"
7003"\n" "n/=1"
7004"\n" "if(n<0){"
7005"\n" "n=-n"
Denys Vlasenko203210e2018-12-14 09:53:50 +01007006"\n" "o=n%2"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01007007"\n" "}"
7008"\n" "a=1"
7009"\n" "for(i=2;i<=n;++i)a*=i"
7010"\n" "scale=1.5*s"
7011"\n" "a=(x^n)/2^n/a"
7012"\n" "r=v=1"
7013"\n" "f=-x*x/4"
Denys Vlasenkoc06537d2018-12-14 10:10:37 +01007014"\n" "scale+=length(a)-scale(a)"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01007015"\n" "for(i=1;v;++i){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01007016"\n" "v=v*f/i/(n+i)"
7017"\n" "r+=v"
7018"\n" "}"
7019"\n" "scale=s"
7020"\n" "ibase=b"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01007021"\n" "if(o)a=-a"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01007022"\n" "return(a*r/1)"
7023"\n" "}"
7024};
7025#endif // ENABLE_BC
7026
Denys Vlasenko19f11072018-12-12 22:48:19 +01007027static BC_STATUS zbc_vm_exec(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06007028{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007029 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06007030 size_t i;
7031
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007032#if ENABLE_BC
Denys Vlasenkod70d4a02018-12-04 20:58:40 +01007033 if (option_mask32 & BC_FLAG_L) {
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01007034 // We know that internal library is not buggy,
7035 // thus error checking is normally disabled.
7036# define DEBUG_LIB 0
Denys Vlasenko0409ad32018-12-05 16:39:22 +01007037 bc_lex_file(&G.prs.l);
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01007038 s = zbc_vm_process(bc_lib);
Denys Vlasenko19f11072018-12-12 22:48:19 +01007039 if (DEBUG_LIB && s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06007040 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007041#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06007042
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007043 s = BC_STATUS_SUCCESS;
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007044 for (i = 0; !s && i < G.files.len; ++i)
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01007045 s = zbc_vm_file(*((char **) bc_vec_item(&G.files, i)));
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007046 if (ENABLE_FEATURE_CLEAN_UP && s && !G_ttyin) {
7047 // Debug config, non-interactive mode:
7048 // return all the way back to main.
7049 // Non-debug builds do not come here, they exit.
Denys Vlasenko19f11072018-12-12 22:48:19 +01007050 RETURN_STATUS(s);
Denys Vlasenko9b70f192018-12-04 20:51:40 +01007051 }
Gavin Howard01055ba2018-11-03 11:00:21 -06007052
Denys Vlasenko91cde952018-12-10 20:56:08 +01007053 if (IS_BC || (option_mask32 & BC_FLAG_I))
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01007054 s = zbc_vm_execute_FILE(stdin, /*filename:*/ NULL);
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007055
Denys Vlasenko19f11072018-12-12 22:48:19 +01007056 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06007057}
Denys Vlasenkoec603182018-12-17 10:34:02 +01007058#define zbc_vm_exec(...) (zbc_vm_exec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06007059
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007060#if ENABLE_FEATURE_CLEAN_UP
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01007061static void bc_program_free(void)
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007062{
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007063 bc_num_free(&G.prog.ob);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007064# if ENABLE_DC
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007065 bc_num_free(&G.prog.strmb);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007066# endif
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007067 bc_vec_free(&G.prog.fns);
7068 bc_vec_free(&G.prog.fn_map);
7069 bc_vec_free(&G.prog.vars);
7070 bc_vec_free(&G.prog.var_map);
7071 bc_vec_free(&G.prog.arrs);
7072 bc_vec_free(&G.prog.arr_map);
7073 bc_vec_free(&G.prog.strs);
7074 bc_vec_free(&G.prog.consts);
7075 bc_vec_free(&G.prog.results);
7076 bc_vec_free(&G.prog.stack);
7077 bc_num_free(&G.prog.last);
7078 bc_num_free(&G.prog.zero);
7079 bc_num_free(&G.prog.one);
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01007080 bc_vec_free(&G.input_buffer);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007081}
7082
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007083static void bc_vm_free(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06007084{
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007085 bc_vec_free(&G.files);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007086 bc_program_free();
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007087 bc_parse_free(&G.prs);
7088 free(G.env_args);
Gavin Howard01055ba2018-11-03 11:00:21 -06007089}
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007090#endif
7091
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007092static void bc_program_init(void)
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007093{
7094 size_t idx;
7095 BcInstPtr ip;
7096
Denys Vlasenko82269122018-12-14 16:30:56 +01007097 // memset(&G.prog, 0, sizeof(G.prog)); - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007098 memset(&ip, 0, sizeof(BcInstPtr));
7099
Denys Vlasenko82269122018-12-14 16:30:56 +01007100 // G.prog.nchars = G.prog.scale = 0; - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007101 G.prog.ib_t = 10;
7102
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007103 bc_num_init_DEF_SIZE(&G.prog.ob);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007104 bc_num_ten(&G.prog.ob);
7105 G.prog.ob_t = 10;
7106
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007107#if ENABLE_DC
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007108 bc_num_init_DEF_SIZE(&G.prog.strmb);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007109 bc_num_ulong2num(&G.prog.strmb, UCHAR_MAX + 1);
7110#endif
7111
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007112 bc_num_init_DEF_SIZE(&G.prog.last);
Denys Vlasenko3129f702018-12-09 12:04:44 +01007113 //bc_num_zero(&G.prog.last); - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007114
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007115 bc_num_init_DEF_SIZE(&G.prog.zero);
Denys Vlasenko3129f702018-12-09 12:04:44 +01007116 //bc_num_zero(&G.prog.zero); - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007117
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007118 bc_num_init_DEF_SIZE(&G.prog.one);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007119 bc_num_one(&G.prog.one);
7120
7121 bc_vec_init(&G.prog.fns, sizeof(BcFunc), bc_func_free);
Denys Vlasenkocb9a99f2018-12-04 21:54:33 +01007122 bc_vec_init(&G.prog.fn_map, sizeof(BcId), bc_id_free);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007123
Denys Vlasenko1f67e932018-12-03 00:08:59 +01007124 bc_program_addFunc(xstrdup("(main)"), &idx);
7125 bc_program_addFunc(xstrdup("(read)"), &idx);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007126
7127 bc_vec_init(&G.prog.vars, sizeof(BcVec), bc_vec_free);
Denys Vlasenkocb9a99f2018-12-04 21:54:33 +01007128 bc_vec_init(&G.prog.var_map, sizeof(BcId), bc_id_free);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007129
7130 bc_vec_init(&G.prog.arrs, sizeof(BcVec), bc_vec_free);
Denys Vlasenkocb9a99f2018-12-04 21:54:33 +01007131 bc_vec_init(&G.prog.arr_map, sizeof(BcId), bc_id_free);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007132
7133 bc_vec_init(&G.prog.strs, sizeof(char *), bc_string_free);
7134 bc_vec_init(&G.prog.consts, sizeof(char *), bc_string_free);
7135 bc_vec_init(&G.prog.results, sizeof(BcResult), bc_result_free);
7136 bc_vec_init(&G.prog.stack, sizeof(BcInstPtr), NULL);
7137 bc_vec_push(&G.prog.stack, &ip);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01007138
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01007139 bc_char_vec_init(&G.input_buffer);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007140}
Gavin Howard01055ba2018-11-03 11:00:21 -06007141
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007142static int bc_vm_init(const char *env_len)
Gavin Howard01055ba2018-11-03 11:00:21 -06007143{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007144#if ENABLE_FEATURE_EDITING
7145 G.line_input_state = new_line_input_t(DO_HISTORY);
7146#endif
7147 G.prog.len = bc_vm_envLen(env_len);
7148
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007149 bc_vec_init(&G.files, sizeof(char *), NULL);
Denys Vlasenko5f263f42018-12-13 22:49:59 +01007150 IF_BC(if (IS_BC) bc_vm_envArgs();)
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007151 bc_program_init();
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01007152 bc_parse_create(&G.prs, BC_PROG_MAIN);
Gavin Howard01055ba2018-11-03 11:00:21 -06007153
Denys Vlasenko89e785a2018-12-13 16:35:52 +01007154//TODO: in GNU bc, the check is (isatty(0) && isatty(1)),
7155//-i option unconditionally enables this regardless of isatty():
Denys Vlasenko1a6a4822018-12-06 09:20:32 +01007156 if (isatty(0)) {
Denys Vlasenkod38af482018-12-04 19:11:02 +01007157#if ENABLE_FEATURE_BC_SIGNALS
Denys Vlasenko1a6a4822018-12-06 09:20:32 +01007158 G_ttyin = 1;
Denys Vlasenko17c54722018-12-04 21:21:32 +01007159 // With SA_RESTART, most system calls will restart
7160 // (IOW: they won't fail with EINTR).
7161 // In particular, this means ^C won't cause
7162 // stdout to get into "error state" if SIGINT hits
7163 // within write() syscall.
Denys Vlasenko89e785a2018-12-13 16:35:52 +01007164 //
7165 // The downside is that ^C while tty input is taken
Denys Vlasenko17c54722018-12-04 21:21:32 +01007166 // will only be handled after [Enter] since read()
7167 // from stdin is not interrupted by ^C either,
7168 // it restarts, thus fgetc() does not return on ^C.
Denys Vlasenko89e785a2018-12-13 16:35:52 +01007169 // (This problem manifests only if line editing is disabled)
Denys Vlasenko17c54722018-12-04 21:21:32 +01007170 signal_SA_RESTART_empty_mask(SIGINT, record_signo);
7171
7172 // Without SA_RESTART, this exhibits a bug:
7173 // "while (1) print 1" and try ^C-ing it.
7174 // Intermittently, instead of returning to input line,
7175 // you'll get "output error: Interrupted system call"
7176 // and exit.
7177 //signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
Denys Vlasenkod38af482018-12-04 19:11:02 +01007178#endif
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007179 return 1; // "tty"
Denys Vlasenkod38af482018-12-04 19:11:02 +01007180 }
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007181 return 0; // "not a tty"
7182}
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007183
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007184static BcStatus bc_vm_run(void)
7185{
Denys Vlasenko19f11072018-12-12 22:48:19 +01007186 BcStatus st = zbc_vm_exec();
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007187#if ENABLE_FEATURE_CLEAN_UP
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01007188 if (G_exiting) // it was actually "halt" or "quit"
7189 st = EXIT_SUCCESS;
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007190 bc_vm_free();
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01007191# if ENABLE_FEATURE_EDITING
7192 free_line_input_t(G.line_input_state);
7193# endif
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01007194 FREE_G();
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007195#endif
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01007196 dbg_exec("exiting with exitcode %d", st);
Gavin Howard01055ba2018-11-03 11:00:21 -06007197 return st;
7198}
7199
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007200#if ENABLE_BC
Denys Vlasenko5a9fef52018-12-02 14:35:32 +01007201int bc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007202int bc_main(int argc UNUSED_PARAM, char **argv)
Gavin Howard01055ba2018-11-03 11:00:21 -06007203{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007204 int is_tty;
7205
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007206 INIT_G();
Gavin Howard01055ba2018-11-03 11:00:21 -06007207
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007208 is_tty = bc_vm_init("BC_LINE_LENGTH");
7209
7210 bc_args(argv);
7211
7212 if (is_tty && !(option_mask32 & BC_FLAG_Q))
7213 bc_vm_info();
7214
7215 return bc_vm_run();
Gavin Howard01055ba2018-11-03 11:00:21 -06007216}
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007217#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06007218
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007219#if ENABLE_DC
Denys Vlasenko5a9fef52018-12-02 14:35:32 +01007220int dc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007221int dc_main(int argc UNUSED_PARAM, char **argv)
Gavin Howard01055ba2018-11-03 11:00:21 -06007222{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007223 int noscript;
7224
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007225 INIT_G();
Denys Vlasenko82269122018-12-14 16:30:56 +01007226
7227 // TODO: dc (GNU bc 1.07.1) 1.4.1 seems to use width
7228 // 1 char wider than bc from the same package.
7229 // Both default width, and xC_LINE_LENGTH=N are wider:
7230 // "DC_LINE_LENGTH=5 dc -e'123456 p'" prints:
Denys Vlasenko0a238142018-12-14 16:48:34 +01007231 // |1234\ |
7232 // |56 |
Denys Vlasenko82269122018-12-14 16:30:56 +01007233 // "echo '123456' | BC_LINE_LENGTH=5 bc" prints:
Denys Vlasenko0a238142018-12-14 16:48:34 +01007234 // |123\ |
7235 // |456 |
Denys Vlasenko82269122018-12-14 16:30:56 +01007236 // Do the same, or it's a bug?
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007237 bc_vm_init("DC_LINE_LENGTH");
Gavin Howard01055ba2018-11-03 11:00:21 -06007238
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007239 // Run -e'SCRIPT' and -fFILE in order of appearance, then handle FILEs
7240 noscript = BC_FLAG_I;
7241 for (;;) {
7242 int n = getopt(argc, argv, "e:f:x");
7243 if (n <= 0)
7244 break;
7245 switch (n) {
7246 case 'e':
7247 noscript = 0;
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01007248 n = zbc_vm_process(optarg);
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007249 if (n) return n;
7250 break;
7251 case 'f':
7252 noscript = 0;
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01007253 n = zbc_vm_file(optarg);
7254 if (n) return n;
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007255 break;
7256 case 'x':
7257 option_mask32 |= DC_FLAG_X;
7258 break;
7259 default:
7260 bb_show_usage();
7261 }
7262 }
7263 argv += optind;
7264
7265 while (*argv) {
7266 noscript = 0;
7267 bc_vec_push(&G.files, argv++);
7268 }
7269
7270 option_mask32 |= noscript; // set BC_FLAG_I if we need to interpret stdin
7271
7272 return bc_vm_run();
Gavin Howard01055ba2018-11-03 11:00:21 -06007273}
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007274#endif
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +01007275
7276#endif // not DC_SMALL