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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{
2658 l->t.t = BC_LEX_WHITESPACE;
2659 while (l->i < l->len && l->buf[l->i++] != '\n');
2660 --l->i;
2661}
2662
2663static void bc_lex_whitespace(BcLex *l)
2664{
Gavin Howard01055ba2018-11-03 11:00:21 -06002665 l->t.t = BC_LEX_WHITESPACE;
Denys Vlasenko89198a92018-12-13 21:31:29 +01002666 for (;;) {
2667 char c = l->buf[l->i];
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01002668 if (c == '\n') // this is BC_LEX_NLINE, not BC_LEX_WHITESPACE
2669 break;
2670 if (!isspace(c))
Denys Vlasenko89198a92018-12-13 21:31:29 +01002671 break;
2672 l->i++;
2673 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002674}
2675
Denys Vlasenko29301232018-12-11 15:29:32 +01002676static BC_STATUS zbc_lex_number(BcLex *l, char start)
Gavin Howard01055ba2018-11-03 11:00:21 -06002677{
2678 const char *buf = l->buf + l->i;
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002679 size_t len, i, ccnt;
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002680 bool pt;
Gavin Howard01055ba2018-11-03 11:00:21 -06002681
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002682 pt = (start == '.');
Gavin Howard01055ba2018-11-03 11:00:21 -06002683 l->t.t = BC_LEX_NUMBER;
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002684 ccnt = i = 0;
2685 for (;;) {
2686 char c = buf[i];
2687 if (c == '\0')
2688 break;
2689 if (c == '\\' && buf[i + 1] == '\n') {
2690 i += 2;
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002691 //number_of_backslashes++ - see comment below
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002692 continue;
Gavin Howard01055ba2018-11-03 11:00:21 -06002693 }
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002694 if (!isdigit(c) && (c < 'A' || c > 'F')) {
2695 if (c != '.') break;
2696 // if '.' was already seen, stop on second one:
2697 if (pt) break;
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002698 pt = true;
Gavin Howard01055ba2018-11-03 11:00:21 -06002699 }
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002700 // buf[i] is one of "0-9A-F."
2701 i++;
2702 if (c != '.')
2703 ccnt = i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002704 }
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002705 //ccnt is the number of chars in the number string, excluding possible
2706 //trailing "[\<newline>].[\<newline>]" (with any number of \<NL> repetitions).
2707 //i is buf[i] index of the first not-yet-parsed char after that.
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002708 l->i += i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002709
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002710 // This might overestimate the size, if there are "\<NL>"'s
2711 // in the number. Subtracting number_of_backslashes*2 correctly
2712 // is not that easy: consider that in the case of "NNN.\<NL>"
2713 // loop above will count "\<NL>" before it realizes it is not
2714 // in fact *inside* the number:
2715 len = ccnt + 1; // +1 byte for NUL termination
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002716
Denys Vlasenko64074a12018-12-07 15:50:14 +01002717 // This check makes sense only if size_t is (much) larger than BC_MAX_NUM.
2718 if (SIZE_MAX > (BC_MAX_NUM | 0xff)) {
2719 if (len > BC_MAX_NUM)
Denys Vlasenko29301232018-12-11 15:29:32 +01002720 RETURN_STATUS(bc_error("number too long: must be [1,"BC_MAX_NUM_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01002721 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002722
Denys Vlasenko7d628012018-12-04 21:46:47 +01002723 bc_vec_pop_all(&l->t.v);
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002724 bc_vec_expand(&l->t.v, 1 + len);
Gavin Howard01055ba2018-11-03 11:00:21 -06002725 bc_vec_push(&l->t.v, &start);
2726
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002727 while (ccnt != 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06002728 // If we have hit a backslash, skip it. We don't have
2729 // to check for a newline because it's guaranteed.
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002730 if (*buf == '\\') {
2731 buf += 2;
2732 ccnt -= 2;
Gavin Howard01055ba2018-11-03 11:00:21 -06002733 continue;
2734 }
Denys Vlasenkoc355c4a2018-12-11 17:36:21 +01002735 bc_vec_push(&l->t.v, buf);
2736 buf++;
2737 ccnt--;
Gavin Howard01055ba2018-11-03 11:00:21 -06002738 }
2739
Denys Vlasenko08c033c2018-12-05 16:55:08 +01002740 bc_vec_pushZeroByte(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06002741
Denys Vlasenko29301232018-12-11 15:29:32 +01002742 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002743}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002744#define zbc_lex_number(...) (zbc_lex_number(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002745
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002746static void bc_lex_name(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002747{
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002748 size_t i;
2749 const char *buf;
Gavin Howard01055ba2018-11-03 11:00:21 -06002750
2751 l->t.t = BC_LEX_NAME;
2752
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002753 i = 0;
2754 buf = l->buf + l->i - 1;
2755 for (;;) {
2756 char c = buf[i];
2757 if ((c < 'a' || c > 'z') && !isdigit(c) && c != '_') break;
2758 i++;
2759 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002760
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002761#if 0 // We do not protect against people with gigabyte-long names
Denys Vlasenko64074a12018-12-07 15:50:14 +01002762 // This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
2763 if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
2764 if (i > BC_MAX_STRING)
2765 return bc_error("name too long: must be [1,"BC_MAX_STRING_STR"]");
2766 }
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002767#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06002768 bc_vec_string(&l->t.v, i, buf);
2769
2770 // Increment the index. We minus 1 because it has already been incremented.
2771 l->i += i - 1;
2772
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002773 //return BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06002774}
2775
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01002776static void bc_lex_init(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002777{
Denys Vlasenko7d628012018-12-04 21:46:47 +01002778 bc_char_vec_init(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06002779}
2780
2781static void bc_lex_free(BcLex *l)
2782{
2783 bc_vec_free(&l->t.v);
2784}
2785
Denys Vlasenko0409ad32018-12-05 16:39:22 +01002786static void bc_lex_file(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002787{
Denys Vlasenko5318f812018-12-05 17:48:01 +01002788 G.err_line = l->line = 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06002789 l->newline = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06002790}
2791
Denys Vlasenkoe755e302018-12-13 22:25:28 +01002792IF_BC(static BC_STATUS zbc_lex_token(BcLex *l);)
2793IF_DC(static BC_STATUS zdc_lex_token(BcLex *l);)
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01002794
2795static BC_STATUS zcommon_lex_token(BcLex *l)
2796{
2797 if (IS_BC) {
2798 IF_BC(RETURN_STATUS(zbc_lex_token(l));)
2799 }
2800 IF_DC(RETURN_STATUS(zdc_lex_token(l));)
2801}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002802#define zcommon_lex_token(...) (zcommon_lex_token(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01002803
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002804static bool bc_lex_more_input(BcLex *l)
2805{
2806 size_t str;
2807 bool comment;
2808
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002809 bc_vec_pop_all(&G.input_buffer);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002810
2811 // This loop is complex because the vm tries not to send any lines that end
2812 // with a backslash to the parser. The reason for that is because the parser
2813 // treats a backslash+newline combo as whitespace, per the bc spec. In that
2814 // case, and for strings and comments, the parser will expect more stuff.
2815 comment = false;
2816 str = 0;
2817 for (;;) {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002818 size_t prevlen = G.input_buffer.len;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002819 char *string;
2820
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002821 bc_read_line(&G.input_buffer, G.input_fp);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002822 // No more input means EOF
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002823 if (G.input_buffer.len <= prevlen + 1) // (we expect +1 for NUL byte)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002824 break;
2825
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002826 string = G.input_buffer.v + prevlen;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002827 while (*string) {
2828 char c = *string;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002829 if (string == G.input_buffer.v || string[-1] != '\\') {
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002830 if (IS_BC)
2831 str ^= (c == '"');
2832 else {
2833 if (c == ']')
2834 str -= 1;
2835 else if (c == '[')
2836 str += 1;
2837 }
2838 }
2839 string++;
2840 if (c == '/' && *string == '*') {
2841 comment = true;
2842 string++;
2843 continue;
2844 }
2845 if (c == '*' && *string == '/') {
2846 comment = false;
2847 string++;
2848 }
2849 }
2850 if (str != 0 || comment) {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002851 G.input_buffer.len--; // backstep over the trailing NUL byte
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002852 continue;
2853 }
2854
2855 // Check for backslash+newline.
2856 // we do not check that last char is '\n' -
2857 // if it is not, then it's EOF, and looping back
2858 // to bc_read_line() will detect it:
2859 string -= 2;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002860 if (string >= G.input_buffer.v && *string == '\\') {
2861 G.input_buffer.len--;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002862 continue;
2863 }
2864
2865 break;
2866 }
2867
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002868 l->buf = G.input_buffer.v;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002869 l->i = 0;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002870// bb_error_msg("G.input_buffer.len:%d '%s'", G.input_buffer.len, G.input_buffer.v);
2871 l->len = G.input_buffer.len - 1; // do not include NUL
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002872
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002873 return l->len != 0;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01002874}
2875
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002876static BC_STATUS zbc_lex_next(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002877{
2878 BcStatus s;
2879
2880 l->t.last = l->t.t;
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002881 if (l->t.last == BC_LEX_EOF) RETURN_STATUS(bc_error("end of file"));
Gavin Howard01055ba2018-11-03 11:00:21 -06002882
2883 l->line += l->newline;
Denys Vlasenko5318f812018-12-05 17:48:01 +01002884 G.err_line = l->line;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002885 l->newline = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06002886
2887 // Loop until failure or we don't have whitespace. This
2888 // is so the parser doesn't get inundated with whitespace.
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01002889 // Comments are also BC_LEX_WHITESPACE tokens and eaten here.
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002890 s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06002891 do {
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01002892 l->t.t = BC_LEX_EOF;
2893 if (l->i == l->len) {
2894 if (!G.input_fp)
2895 RETURN_STATUS(BC_STATUS_SUCCESS);
2896 if (!bc_lex_more_input(l)) {
2897 G.input_fp = NULL;
2898 RETURN_STATUS(BC_STATUS_SUCCESS);
2899 }
2900 // here it's guaranteed that l->i is below l->len
2901 }
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01002902 dbg_lex("next string to parse:'%.*s'",
Denys Vlasenko0a238142018-12-14 16:48:34 +01002903 (int)(strchrnul(l->buf + l->i, '\n') - (l->buf + l->i)),
2904 l->buf + l->i);
Denys Vlasenkoec603182018-12-17 10:34:02 +01002905 s = zcommon_lex_token(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06002906 } while (!s && l->t.t == BC_LEX_WHITESPACE);
Denys Vlasenko17df8822018-12-14 23:00:24 +01002907 dbg_lex("l->t.t from string:%d", l->t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06002908
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002909 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002910}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002911#define zbc_lex_next(...) (zbc_lex_next(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002912
Denys Vlasenko202dd192018-12-16 17:30:35 +01002913static BC_STATUS zbc_lex_skip_if_at_NLINE(BcLex *l)
2914{
2915 if (l->t.t == BC_LEX_NLINE)
2916 RETURN_STATUS(zbc_lex_next(l));
2917 RETURN_STATUS(BC_STATUS_SUCCESS);
2918}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002919#define zbc_lex_skip_if_at_NLINE(...) (zbc_lex_skip_if_at_NLINE(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko202dd192018-12-16 17:30:35 +01002920
2921static BC_STATUS zbc_lex_next_and_skip_NLINE(BcLex *l)
2922{
2923 BcStatus s;
2924 s = zbc_lex_next(l);
2925 if (s) RETURN_STATUS(s);
2926 // if(cond)<newline>stmt is accepted too (but not 2+ newlines)
2927 s = zbc_lex_skip_if_at_NLINE(l);
2928 RETURN_STATUS(s);
2929}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002930#define zbc_lex_next_and_skip_NLINE(...) (zbc_lex_next_and_skip_NLINE(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko202dd192018-12-16 17:30:35 +01002931
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01002932static BC_STATUS zbc_lex_text_init(BcLex *l, const char *text)
Gavin Howard01055ba2018-11-03 11:00:21 -06002933{
2934 l->buf = text;
2935 l->i = 0;
2936 l->len = strlen(text);
2937 l->t.t = l->t.last = BC_LEX_INVALID;
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002938 RETURN_STATUS(zbc_lex_next(l));
Gavin Howard01055ba2018-11-03 11:00:21 -06002939}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002940#define zbc_lex_text_init(...) (zbc_lex_text_init(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002941
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01002942#if ENABLE_BC
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002943static BC_STATUS zbc_lex_identifier(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002944{
2945 BcStatus s;
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002946 unsigned i;
Gavin Howard01055ba2018-11-03 11:00:21 -06002947 const char *buf = l->buf + l->i - 1;
2948
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002949 for (i = 0; i < ARRAY_SIZE(bc_lex_kws); ++i) {
2950 const char *keyword8 = bc_lex_kws[i].name8;
2951 unsigned j = 0;
2952 while (buf[j] != '\0' && buf[j] == keyword8[j]) {
2953 j++;
2954 if (j == 8) goto match;
Gavin Howard01055ba2018-11-03 11:00:21 -06002955 }
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002956 if (keyword8[j] != '\0')
2957 continue;
2958 match:
2959 // buf starts with keyword bc_lex_kws[i]
2960 l->t.t = BC_LEX_KEY_1st_keyword + i;
Denys Vlasenkod00d2f92018-12-06 12:59:40 +01002961 if (!bc_lex_kws_POSIX(i)) {
Denys Vlasenko0d7e46b2018-12-05 18:31:19 +01002962 s = bc_posix_error_fmt("%sthe '%.8s' keyword", "POSIX does not allow ", bc_lex_kws[i].name8);
Denys Vlasenkoec603182018-12-17 10:34:02 +01002963 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01002964 }
2965
2966 // We minus 1 because the index has already been incremented.
2967 l->i += j - 1;
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002968 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06002969 }
2970
Denys Vlasenko88cfea62018-12-10 20:26:04 +01002971 bc_lex_name(l);
Denys Vlasenko0f31a5c2018-12-18 03:16:48 +01002972 s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06002973
Denys Vlasenko0d7e46b2018-12-05 18:31:19 +01002974 if (l->t.v.len > 2) {
2975 // Prevent this:
2976 // >>> qwe=1
2977 // bc: POSIX only allows one character names; the following is bad: 'qwe=1
2978 // '
2979 unsigned len = strchrnul(buf, '\n') - buf;
2980 s = bc_posix_error_fmt("POSIX only allows one character names; the following is bad: '%.*s'", len, buf);
2981 }
Gavin Howard01055ba2018-11-03 11:00:21 -06002982
Denys Vlasenko9a34e892018-12-12 13:58:55 +01002983 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06002984}
Denys Vlasenkoec603182018-12-17 10:34:02 +01002985#define zbc_lex_identifier(...) (zbc_lex_identifier(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06002986
Denys Vlasenko26819db2018-12-12 16:08:46 +01002987static BC_STATUS zbc_lex_string(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06002988{
2989 size_t len, nls = 0, i = l->i;
2990 char c;
2991
2992 l->t.t = BC_LEX_STR;
2993
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01002994 for (c = l->buf[i]; c != '\0' && c != '"'; c = l->buf[++i])
Denys Vlasenko26819db2018-12-12 16:08:46 +01002995 nls += (c == '\n');
Gavin Howard01055ba2018-11-03 11:00:21 -06002996
2997 if (c == '\0') {
2998 l->i = i;
Denys Vlasenko26819db2018-12-12 16:08:46 +01002999 RETURN_STATUS(bc_error("string end could not be found"));
Gavin Howard01055ba2018-11-03 11:00:21 -06003000 }
3001
3002 len = i - l->i;
Denys Vlasenko64074a12018-12-07 15:50:14 +01003003 // This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
3004 if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
3005 if (len > BC_MAX_STRING)
Denys Vlasenko9811ad02018-12-12 23:25:13 +01003006 RETURN_STATUS(bc_error("string too long: must be [1,"BC_MAX_STRING_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01003007 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003008 bc_vec_string(&l->t.v, len, l->buf + l->i);
3009
3010 l->i = i + 1;
3011 l->line += nls;
Denys Vlasenko5318f812018-12-05 17:48:01 +01003012 G.err_line = l->line;
Gavin Howard01055ba2018-11-03 11:00:21 -06003013
Denys Vlasenko26819db2018-12-12 16:08:46 +01003014 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003015}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003016#define zbc_lex_string(...) (zbc_lex_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003017
Denys Vlasenko0a238142018-12-14 16:48:34 +01003018static void bc_lex_assign(BcLex *l, unsigned with_and_without)
Gavin Howard01055ba2018-11-03 11:00:21 -06003019{
3020 if (l->buf[l->i] == '=') {
3021 ++l->i;
Denys Vlasenko0a238142018-12-14 16:48:34 +01003022 with_and_without >>= 8; // store "with" value
3023 } // else store "without" value
3024 l->t.t = (with_and_without & 0xff);
Gavin Howard01055ba2018-11-03 11:00:21 -06003025}
Denys Vlasenko0a238142018-12-14 16:48:34 +01003026#define bc_lex_assign(l, with, without) \
3027 bc_lex_assign(l, ((with)<<8)|(without))
Gavin Howard01055ba2018-11-03 11:00:21 -06003028
Denys Vlasenko29301232018-12-11 15:29:32 +01003029static BC_STATUS zbc_lex_comment(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003030{
3031 size_t i, nls = 0;
3032 const char *buf = l->buf;
Gavin Howard01055ba2018-11-03 11:00:21 -06003033
3034 l->t.t = BC_LEX_WHITESPACE;
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003035 i = l->i; /* here buf[l->i] is the '*' of opening comment delimiter */
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003036 for (;;) {
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003037 char c = buf[++i];
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003038 check_star:
3039 if (c == '*') {
3040 c = buf[++i];
3041 if (c == '/')
3042 break;
3043 goto check_star;
3044 }
3045 if (c == '\0') {
Gavin Howard01055ba2018-11-03 11:00:21 -06003046 l->i = i;
Denys Vlasenko29301232018-12-11 15:29:32 +01003047 RETURN_STATUS(bc_error("comment end could not be found"));
Gavin Howard01055ba2018-11-03 11:00:21 -06003048 }
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003049 nls += (c == '\n');
Gavin Howard01055ba2018-11-03 11:00:21 -06003050 }
3051
Denys Vlasenkobc5ce662018-12-03 19:12:29 +01003052 l->i = i + 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06003053 l->line += nls;
Denys Vlasenko5318f812018-12-05 17:48:01 +01003054 G.err_line = l->line;
Gavin Howard01055ba2018-11-03 11:00:21 -06003055
Denys Vlasenko29301232018-12-11 15:29:32 +01003056 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003057}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003058#define zbc_lex_comment(...) (zbc_lex_comment(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003059
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003060static BC_STATUS zbc_lex_token(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003061{
3062 BcStatus s = BC_STATUS_SUCCESS;
3063 char c = l->buf[l->i++], c2;
3064
3065 // This is the workhorse of the lexer.
3066 switch (c) {
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003067// case '\0': // probably never reached
3068// l->i--;
3069// l->t.t = BC_LEX_EOF;
3070// l->newline = true;
3071// break;
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003072 case '\n':
3073 l->t.t = BC_LEX_NLINE;
3074 l->newline = true;
Gavin Howard01055ba2018-11-03 11:00:21 -06003075 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003076 case '\t':
3077 case '\v':
3078 case '\f':
3079 case '\r':
3080 case ' ':
Gavin Howard01055ba2018-11-03 11:00:21 -06003081 bc_lex_whitespace(l);
3082 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003083 case '!':
Gavin Howard01055ba2018-11-03 11:00:21 -06003084 bc_lex_assign(l, BC_LEX_OP_REL_NE, BC_LEX_OP_BOOL_NOT);
Gavin Howard01055ba2018-11-03 11:00:21 -06003085 if (l->t.t == BC_LEX_OP_BOOL_NOT) {
Denys Vlasenko00646792018-12-05 18:12:27 +01003086 s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("!");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003087 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003088 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003089 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003090 case '"':
Denys Vlasenko26819db2018-12-12 16:08:46 +01003091 s = zbc_lex_string(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003092 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003093 case '#':
Denys Vlasenko00646792018-12-05 18:12:27 +01003094 s = bc_POSIX_does_not_allow("'#' script comments");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003095 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003096 bc_lex_lineComment(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003097 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003098 case '%':
Gavin Howard01055ba2018-11-03 11:00:21 -06003099 bc_lex_assign(l, BC_LEX_OP_ASSIGN_MODULUS, BC_LEX_OP_MODULUS);
3100 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003101 case '&':
Gavin Howard01055ba2018-11-03 11:00:21 -06003102 c2 = l->buf[l->i];
3103 if (c2 == '&') {
Denys Vlasenko00646792018-12-05 18:12:27 +01003104 s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("&&");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003105 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003106 ++l->i;
3107 l->t.t = BC_LEX_OP_BOOL_AND;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003108 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003109 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003110 s = bc_error_bad_character('&');
Gavin Howard01055ba2018-11-03 11:00:21 -06003111 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003112 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003113 case '(':
3114 case ')':
Gavin Howard01055ba2018-11-03 11:00:21 -06003115 l->t.t = (BcLexType)(c - '(' + BC_LEX_LPAREN);
3116 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003117 case '*':
Gavin Howard01055ba2018-11-03 11:00:21 -06003118 bc_lex_assign(l, BC_LEX_OP_ASSIGN_MULTIPLY, BC_LEX_OP_MULTIPLY);
3119 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003120 case '+':
Gavin Howard01055ba2018-11-03 11:00:21 -06003121 c2 = l->buf[l->i];
3122 if (c2 == '+') {
3123 ++l->i;
3124 l->t.t = BC_LEX_OP_INC;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003125 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06003126 bc_lex_assign(l, BC_LEX_OP_ASSIGN_PLUS, BC_LEX_OP_PLUS);
3127 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003128 case ',':
Gavin Howard01055ba2018-11-03 11:00:21 -06003129 l->t.t = BC_LEX_COMMA;
3130 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003131 case '-':
Gavin Howard01055ba2018-11-03 11:00:21 -06003132 c2 = l->buf[l->i];
3133 if (c2 == '-') {
3134 ++l->i;
3135 l->t.t = BC_LEX_OP_DEC;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003136 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06003137 bc_lex_assign(l, BC_LEX_OP_ASSIGN_MINUS, BC_LEX_OP_MINUS);
3138 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003139 case '.':
Gavin Howard01055ba2018-11-03 11:00:21 -06003140 if (isdigit(l->buf[l->i]))
Denys Vlasenko29301232018-12-11 15:29:32 +01003141 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003142 else {
3143 l->t.t = BC_LEX_KEY_LAST;
Denys Vlasenko00646792018-12-05 18:12:27 +01003144 s = bc_POSIX_does_not_allow("a period ('.') as a shortcut for the last result");
Gavin Howard01055ba2018-11-03 11:00:21 -06003145 }
3146 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003147 case '/':
Gavin Howard01055ba2018-11-03 11:00:21 -06003148 c2 = l->buf[l->i];
3149 if (c2 == '*')
Denys Vlasenko29301232018-12-11 15:29:32 +01003150 s = zbc_lex_comment(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003151 else
3152 bc_lex_assign(l, BC_LEX_OP_ASSIGN_DIVIDE, BC_LEX_OP_DIVIDE);
3153 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003154 case '0':
3155 case '1':
3156 case '2':
3157 case '3':
3158 case '4':
3159 case '5':
3160 case '6':
3161 case '7':
3162 case '8':
3163 case '9':
3164 case 'A':
3165 case 'B':
3166 case 'C':
3167 case 'D':
3168 case 'E':
3169 case 'F':
Denys Vlasenko29301232018-12-11 15:29:32 +01003170 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003171 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003172 case ';':
Gavin Howard01055ba2018-11-03 11:00:21 -06003173 l->t.t = BC_LEX_SCOLON;
3174 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003175 case '<':
Gavin Howard01055ba2018-11-03 11:00:21 -06003176 bc_lex_assign(l, BC_LEX_OP_REL_LE, BC_LEX_OP_REL_LT);
3177 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003178 case '=':
Gavin Howard01055ba2018-11-03 11:00:21 -06003179 bc_lex_assign(l, BC_LEX_OP_REL_EQ, BC_LEX_OP_ASSIGN);
3180 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003181 case '>':
Gavin Howard01055ba2018-11-03 11:00:21 -06003182 bc_lex_assign(l, BC_LEX_OP_REL_GE, BC_LEX_OP_REL_GT);
3183 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003184 case '[':
3185 case ']':
Gavin Howard01055ba2018-11-03 11:00:21 -06003186 l->t.t = (BcLexType)(c - '[' + BC_LEX_LBRACKET);
3187 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003188 case '\\':
Gavin Howard01055ba2018-11-03 11:00:21 -06003189 if (l->buf[l->i] == '\n') {
3190 l->t.t = BC_LEX_WHITESPACE;
3191 ++l->i;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003192 } else
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003193 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003194 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003195 case '^':
Gavin Howard01055ba2018-11-03 11:00:21 -06003196 bc_lex_assign(l, BC_LEX_OP_ASSIGN_POWER, BC_LEX_OP_POWER);
3197 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003198 case 'a':
3199 case 'b':
3200 case 'c':
3201 case 'd':
3202 case 'e':
3203 case 'f':
3204 case 'g':
3205 case 'h':
3206 case 'i':
3207 case 'j':
3208 case 'k':
3209 case 'l':
3210 case 'm':
3211 case 'n':
3212 case 'o':
3213 case 'p':
3214 case 'q':
3215 case 'r':
3216 case 's':
3217 case 't':
3218 case 'u':
3219 case 'v':
3220 case 'w':
3221 case 'x':
3222 case 'y':
3223 case 'z':
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003224 s = zbc_lex_identifier(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003225 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003226 case '{':
3227 case '}':
Gavin Howard01055ba2018-11-03 11:00:21 -06003228 l->t.t = (BcLexType)(c - '{' + BC_LEX_LBRACE);
3229 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003230 case '|':
Gavin Howard01055ba2018-11-03 11:00:21 -06003231 c2 = l->buf[l->i];
Gavin Howard01055ba2018-11-03 11:00:21 -06003232 if (c2 == '|') {
Denys Vlasenko00646792018-12-05 18:12:27 +01003233 s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("||");
Denys Vlasenkoec603182018-12-17 10:34:02 +01003234 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06003235 ++l->i;
3236 l->t.t = BC_LEX_OP_BOOL_OR;
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003237 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003238 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003239 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003240 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003241 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003242 default:
Gavin Howard01055ba2018-11-03 11:00:21 -06003243 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003244 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003245 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003246 }
3247
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003248 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003249}
3250#endif // ENABLE_BC
3251
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01003252#if ENABLE_DC
Denys Vlasenko29301232018-12-11 15:29:32 +01003253static BC_STATUS zdc_lex_register(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003254{
Gavin Howard01055ba2018-11-03 11:00:21 -06003255 if (isspace(l->buf[l->i - 1])) {
3256 bc_lex_whitespace(l);
3257 ++l->i;
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01003258 if (!G_exreg)
Denys Vlasenko29301232018-12-11 15:29:32 +01003259 RETURN_STATUS(bc_error("extended register"));
3260 bc_lex_name(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003261 }
3262 else {
Denys Vlasenko7d628012018-12-04 21:46:47 +01003263 bc_vec_pop_all(&l->t.v);
Denys Vlasenkoe55a5722018-12-06 12:47:17 +01003264 bc_vec_push(&l->t.v, &l->buf[l->i - 1]);
Denys Vlasenko08c033c2018-12-05 16:55:08 +01003265 bc_vec_pushZeroByte(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06003266 l->t.t = BC_LEX_NAME;
3267 }
3268
Denys Vlasenko29301232018-12-11 15:29:32 +01003269 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003270}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003271#define zdc_lex_register(...) (zdc_lex_register(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003272
Denys Vlasenko29301232018-12-11 15:29:32 +01003273static BC_STATUS zdc_lex_string(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003274{
3275 size_t depth = 1, nls = 0, i = l->i;
3276 char c;
3277
3278 l->t.t = BC_LEX_STR;
Denys Vlasenko7d628012018-12-04 21:46:47 +01003279 bc_vec_pop_all(&l->t.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06003280
3281 for (c = l->buf[i]; c != 0 && depth; c = l->buf[++i]) {
3282
3283 depth += (c == '[' && (i == l->i || l->buf[i - 1] != '\\'));
3284 depth -= (c == ']' && (i == l->i || l->buf[i - 1] != '\\'));
3285 nls += (c == '\n');
3286
3287 if (depth) bc_vec_push(&l->t.v, &c);
3288 }
3289
3290 if (c == '\0') {
3291 l->i = i;
Denys Vlasenko29301232018-12-11 15:29:32 +01003292 RETURN_STATUS(bc_error("string end could not be found"));
Gavin Howard01055ba2018-11-03 11:00:21 -06003293 }
3294
Denys Vlasenko08c033c2018-12-05 16:55:08 +01003295 bc_vec_pushZeroByte(&l->t.v);
Denys Vlasenko64074a12018-12-07 15:50:14 +01003296 // This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
3297 if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
3298 if (i - l->i > BC_MAX_STRING)
Denys Vlasenko29301232018-12-11 15:29:32 +01003299 RETURN_STATUS(bc_error("string too long: must be [1,"BC_MAX_STRING_STR"]"));
Denys Vlasenko64074a12018-12-07 15:50:14 +01003300 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003301
3302 l->i = i;
3303 l->line += nls;
Denys Vlasenko5318f812018-12-05 17:48:01 +01003304 G.err_line = l->line;
Gavin Howard01055ba2018-11-03 11:00:21 -06003305
Denys Vlasenko29301232018-12-11 15:29:32 +01003306 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003307}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003308#define zdc_lex_string(...) (zdc_lex_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003309
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003310static BC_STATUS zdc_lex_token(BcLex *l)
Gavin Howard01055ba2018-11-03 11:00:21 -06003311{
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003312 static const //BcLexType - should be this type, but narrower type saves size:
3313 uint8_t
3314 dc_lex_regs[] = {
3315 BC_LEX_OP_REL_EQ, BC_LEX_OP_REL_LE, BC_LEX_OP_REL_GE, BC_LEX_OP_REL_NE,
3316 BC_LEX_OP_REL_LT, BC_LEX_OP_REL_GT, BC_LEX_SCOLON, BC_LEX_COLON,
3317 BC_LEX_ELSE, BC_LEX_LOAD, BC_LEX_LOAD_POP, BC_LEX_OP_ASSIGN,
3318 BC_LEX_STORE_PUSH,
3319 };
3320 static const //BcLexType - should be this type
3321 uint8_t
3322 dc_lex_tokens[] = {
3323 /* %&'( */
3324 BC_LEX_OP_MODULUS, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_LPAREN,
3325 /* )*+, */
3326 BC_LEX_INVALID, BC_LEX_OP_MULTIPLY, BC_LEX_OP_PLUS, BC_LEX_INVALID,
3327 /* -./ */
3328 BC_LEX_OP_MINUS, BC_LEX_INVALID, BC_LEX_OP_DIVIDE,
3329 /* 0123456789 */
3330 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3331 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3332 BC_LEX_INVALID, BC_LEX_INVALID,
3333 /* :;<=>?@ */
3334 BC_LEX_COLON, BC_LEX_SCOLON, BC_LEX_OP_REL_GT, BC_LEX_OP_REL_EQ,
3335 BC_LEX_OP_REL_LT, BC_LEX_KEY_READ, BC_LEX_INVALID,
3336 /* ABCDEFGH */
3337 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3338 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_EQ_NO_REG, BC_LEX_INVALID,
3339 /* IJKLMNOP */
3340 BC_LEX_KEY_IBASE, BC_LEX_INVALID, BC_LEX_KEY_SCALE, BC_LEX_LOAD_POP,
3341 BC_LEX_INVALID, BC_LEX_OP_BOOL_NOT, BC_LEX_KEY_OBASE, BC_LEX_PRINT_STREAM,
3342 /* QRSTUVWXY */
3343 BC_LEX_NQUIT, BC_LEX_POP, BC_LEX_STORE_PUSH, BC_LEX_INVALID, BC_LEX_INVALID,
3344 BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_SCALE_FACTOR, BC_LEX_INVALID,
3345 /* Z[\] */
3346 BC_LEX_KEY_LENGTH, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
3347 /* ^_` */
3348 BC_LEX_OP_POWER, BC_LEX_NEG, BC_LEX_INVALID,
3349 /* abcdefgh */
3350 BC_LEX_ASCIIFY, BC_LEX_INVALID, BC_LEX_CLEAR_STACK, BC_LEX_DUPLICATE,
3351 BC_LEX_ELSE, BC_LEX_PRINT_STACK, BC_LEX_INVALID, BC_LEX_INVALID,
3352 /* ijklmnop */
3353 BC_LEX_STORE_IBASE, BC_LEX_INVALID, BC_LEX_STORE_SCALE, BC_LEX_LOAD,
3354 BC_LEX_INVALID, BC_LEX_PRINT_POP, BC_LEX_STORE_OBASE, BC_LEX_KEY_PRINT,
3355 /* qrstuvwx */
3356 BC_LEX_KEY_QUIT, BC_LEX_SWAP, BC_LEX_OP_ASSIGN, BC_LEX_INVALID,
3357 BC_LEX_INVALID, BC_LEX_KEY_SQRT, BC_LEX_INVALID, BC_LEX_EXECUTE,
3358 /* yz */
3359 BC_LEX_INVALID, BC_LEX_STACK_LEVEL,
3360 /* {|}~ */
3361 BC_LEX_LBRACE, BC_LEX_OP_MODEXP, BC_LEX_INVALID, BC_LEX_OP_DIVMOD,
3362 };
3363
Gavin Howard01055ba2018-11-03 11:00:21 -06003364 BcStatus s = BC_STATUS_SUCCESS;
3365 char c = l->buf[l->i++], c2;
3366 size_t i;
3367
Denys Vlasenko51fb8aa2018-12-05 00:22:34 +01003368 for (i = 0; i < ARRAY_SIZE(dc_lex_regs); ++i) {
3369 if (l->t.last == dc_lex_regs[i])
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003370 RETURN_STATUS(zdc_lex_register(l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003371 }
3372
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003373 if (c >= '%' && c <= '~'
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003374 && (l->t.t = dc_lex_tokens[c - '%']) != BC_LEX_INVALID
Denys Vlasenko12b9eaf2018-12-11 23:50:14 +01003375 ) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003376 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003377 }
3378
3379 // This is the workhorse of the lexer.
3380 switch (c) {
Denys Vlasenkob44a7f12018-12-17 11:58:20 +01003381// case '\0': // probably never reached
3382// l->t.t = BC_LEX_EOF;
3383// break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003384 case '\n':
3385 case '\t':
3386 case '\v':
3387 case '\f':
3388 case '\r':
3389 case ' ':
Gavin Howard01055ba2018-11-03 11:00:21 -06003390 l->newline = (c == '\n');
3391 bc_lex_whitespace(l);
3392 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003393 case '!':
Gavin Howard01055ba2018-11-03 11:00:21 -06003394 c2 = l->buf[l->i];
Gavin Howard01055ba2018-11-03 11:00:21 -06003395 if (c2 == '=')
3396 l->t.t = BC_LEX_OP_REL_NE;
3397 else if (c2 == '<')
3398 l->t.t = BC_LEX_OP_REL_LE;
3399 else if (c2 == '>')
3400 l->t.t = BC_LEX_OP_REL_GE;
3401 else
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003402 RETURN_STATUS(bc_error_bad_character(c));
Gavin Howard01055ba2018-11-03 11:00:21 -06003403 ++l->i;
3404 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003405 case '#':
Gavin Howard01055ba2018-11-03 11:00:21 -06003406 bc_lex_lineComment(l);
3407 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003408 case '.':
Gavin Howard01055ba2018-11-03 11:00:21 -06003409 if (isdigit(l->buf[l->i]))
Denys Vlasenko29301232018-12-11 15:29:32 +01003410 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003411 else
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003412 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003413 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003414 case '0':
3415 case '1':
3416 case '2':
3417 case '3':
3418 case '4':
3419 case '5':
3420 case '6':
3421 case '7':
3422 case '8':
3423 case '9':
3424 case 'A':
3425 case 'B':
3426 case 'C':
3427 case 'D':
3428 case 'E':
3429 case 'F':
Denys Vlasenko29301232018-12-11 15:29:32 +01003430 s = zbc_lex_number(l, c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003431 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003432 case '[':
Denys Vlasenko29301232018-12-11 15:29:32 +01003433 s = zdc_lex_string(l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003434 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003435 default:
Gavin Howard01055ba2018-11-03 11:00:21 -06003436 l->t.t = BC_LEX_INVALID;
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003437 s = bc_error_bad_character(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06003438 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003439 }
3440
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003441 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003442}
3443#endif // ENABLE_DC
3444
Denys Vlasenkob6f60862018-12-06 12:54:26 +01003445static void bc_program_addFunc(char *name, size_t *idx);
3446
Gavin Howard01055ba2018-11-03 11:00:21 -06003447static void bc_parse_addFunc(BcParse *p, char *name, size_t *idx)
3448{
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003449 bc_program_addFunc(name, idx);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003450 p->func = bc_program_func(p->fidx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003451}
3452
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01003453static void bc_parse_push(BcParse *p, char i)
3454{
3455 dbg_lex("%s:%d pushing opcode %d", __func__, __LINE__, i);
3456 bc_vec_pushByte(&p->func->code, i);
3457}
Denys Vlasenkob23ac512018-12-06 13:10:56 +01003458
Gavin Howard01055ba2018-11-03 11:00:21 -06003459static void bc_parse_pushName(BcParse *p, char *name)
3460{
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01003461 while (*name)
3462 bc_parse_push(p, *name++);
Gavin Howard01055ba2018-11-03 11:00:21 -06003463 bc_parse_push(p, BC_PARSE_STREND);
Gavin Howard01055ba2018-11-03 11:00:21 -06003464}
3465
3466static void bc_parse_pushIndex(BcParse *p, size_t idx)
3467{
Denys Vlasenkoc2da68e2018-12-12 16:44:34 +01003468 size_t mask;
3469 unsigned amt;
Gavin Howard01055ba2018-11-03 11:00:21 -06003470
Denys Vlasenkof4f10722018-12-18 02:23:53 +01003471 dbg_lex("%s:%d pushing index %zd", __func__, __LINE__, idx);
Denys Vlasenkoc2da68e2018-12-12 16:44:34 +01003472 mask = ((size_t)0xff) << (sizeof(idx) * 8 - 8);
3473 amt = sizeof(idx);
3474 do {
3475 if (idx & mask) break;
3476 mask >>= 8;
3477 amt--;
3478 } while (amt != 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06003479
3480 bc_parse_push(p, amt);
Denys Vlasenkoc2da68e2018-12-12 16:44:34 +01003481
3482 while (idx != 0) {
3483 bc_parse_push(p, (unsigned char)idx);
3484 idx >>= 8;
3485 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003486}
3487
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003488static void bc_parse_pushJUMP(BcParse *p, size_t idx)
3489{
3490 bc_parse_push(p, BC_INST_JUMP);
3491 bc_parse_pushIndex(p, idx);
3492}
3493
3494static void bc_parse_pushJUMP_ZERO(BcParse *p, size_t idx)
3495{
3496 bc_parse_push(p, BC_INST_JUMP_ZERO);
3497 bc_parse_pushIndex(p, idx);
3498}
3499
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01003500static void bc_parse_number(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003501{
3502 char *num = xstrdup(p->l.t.v.v);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003503 size_t idx = G.prog.consts.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06003504
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003505 bc_vec_push(&G.prog.consts, &num);
Gavin Howard01055ba2018-11-03 11:00:21 -06003506
3507 bc_parse_push(p, BC_INST_NUM);
3508 bc_parse_pushIndex(p, idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003509}
3510
Denys Vlasenko99b37622018-12-15 20:06:59 +01003511IF_BC(static BC_STATUS zbc_parse_stmt_or_funcdef(BcParse *p);)
Denys Vlasenkoe755e302018-12-13 22:25:28 +01003512IF_DC(static BC_STATUS zdc_parse_parse(BcParse *p);)
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003513
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003514// "Parse" half of "parse,execute,repeat" main loop
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003515static BC_STATUS zcommon_parse(BcParse *p)
3516{
3517 if (IS_BC) {
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003518// FIXME: "eating" of stmt delemiters is coded inconsistently
3519// (sometimes zbc_parse_stmt() eats the delimiter, sometimes don't),
3520// which causes bugs such as "print 1 print 2" erroneously accepted,
3521// or "print 1 else 2" detecting parse error only after executing
3522// "print 1" part.
Denys Vlasenko99b37622018-12-15 20:06:59 +01003523 IF_BC(RETURN_STATUS(zbc_parse_stmt_or_funcdef(p));)
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003524 }
3525 IF_DC(RETURN_STATUS(zdc_parse_parse(p));)
3526}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003527#define zcommon_parse(...) (zcommon_parse(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01003528
Denys Vlasenkof86e9602018-12-14 17:01:56 +01003529static BC_STATUS zbc_parse_text_init(BcParse *p, const char *text)
Gavin Howard01055ba2018-11-03 11:00:21 -06003530{
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003531 p->func = bc_program_func(p->fidx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003532
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01003533 RETURN_STATUS(zbc_lex_text_init(&p->l, text));
Gavin Howard01055ba2018-11-03 11:00:21 -06003534}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003535#define zbc_parse_text_init(...) (zbc_parse_text_init(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003536
Denys Vlasenkob6f60862018-12-06 12:54:26 +01003537// Called when parsing or execution detects a failure,
3538// resets execution structures.
3539static void bc_program_reset(void)
3540{
3541 BcFunc *f;
3542 BcInstPtr *ip;
3543
3544 bc_vec_npop(&G.prog.stack, G.prog.stack.len - 1);
3545 bc_vec_pop_all(&G.prog.results);
3546
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003547 f = bc_program_func(0);
Denys Vlasenkob6f60862018-12-06 12:54:26 +01003548 ip = bc_vec_top(&G.prog.stack);
3549 ip->idx = f->code.len;
3550}
3551
Denys Vlasenkoe55a5722018-12-06 12:47:17 +01003552#define bc_parse_updateFunc(p, f) \
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01003553 ((p)->func = bc_program_func((p)->fidx = (f)))
Denys Vlasenkoe55a5722018-12-06 12:47:17 +01003554
Denys Vlasenko26819db2018-12-12 16:08:46 +01003555// Called when zbc/zdc_parse_parse() detects a failure,
Denys Vlasenkod38af482018-12-04 19:11:02 +01003556// resets parsing structures.
3557static void bc_parse_reset(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003558{
3559 if (p->fidx != BC_PROG_MAIN) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003560 p->func->nparams = 0;
Denys Vlasenko7d628012018-12-04 21:46:47 +01003561 bc_vec_pop_all(&p->func->code);
3562 bc_vec_pop_all(&p->func->autos);
3563 bc_vec_pop_all(&p->func->labels);
Gavin Howard01055ba2018-11-03 11:00:21 -06003564
3565 bc_parse_updateFunc(p, BC_PROG_MAIN);
3566 }
3567
3568 p->l.i = p->l.len;
3569 p->l.t.t = BC_LEX_EOF;
Gavin Howard01055ba2018-11-03 11:00:21 -06003570
Denys Vlasenko7d628012018-12-04 21:46:47 +01003571 bc_vec_pop_all(&p->exits);
3572 bc_vec_pop_all(&p->conds);
3573 bc_vec_pop_all(&p->ops);
Gavin Howard01055ba2018-11-03 11:00:21 -06003574
Denys Vlasenkod38af482018-12-04 19:11:02 +01003575 bc_program_reset();
Gavin Howard01055ba2018-11-03 11:00:21 -06003576}
3577
3578static void bc_parse_free(BcParse *p)
3579{
Gavin Howard01055ba2018-11-03 11:00:21 -06003580 bc_vec_free(&p->exits);
3581 bc_vec_free(&p->conds);
3582 bc_vec_free(&p->ops);
3583 bc_lex_free(&p->l);
3584}
3585
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003586static void bc_parse_create(BcParse *p, size_t func)
Gavin Howard01055ba2018-11-03 11:00:21 -06003587{
3588 memset(p, 0, sizeof(BcParse));
3589
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01003590 bc_lex_init(&p->l);
Denys Vlasenko266aa002018-12-16 23:24:25 +01003591 bc_vec_init(&p->exits, sizeof(size_t), NULL);
Gavin Howard01055ba2018-11-03 11:00:21 -06003592 bc_vec_init(&p->conds, sizeof(size_t), NULL);
Gavin Howard01055ba2018-11-03 11:00:21 -06003593 bc_vec_init(&p->ops, sizeof(BcLexType), NULL);
3594
Gavin Howard01055ba2018-11-03 11:00:21 -06003595 bc_parse_updateFunc(p, func);
3596}
3597
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01003598#if ENABLE_BC
Denys Vlasenkocca79a02018-12-05 21:15:46 +01003599
3600#define BC_PARSE_TOP_OP(p) (*((BcLexType *) bc_vec_top(&(p)->ops)))
3601#define BC_PARSE_LEAF(p, rparen) \
3602 (((p) >= BC_INST_NUM && (p) <= BC_INST_SQRT) || (rparen) || \
3603 (p) == BC_INST_INC_POST || (p) == BC_INST_DEC_POST)
3604
3605// We can calculate the conversion between tokens and exprs by subtracting the
3606// position of the first operator in the lex enum and adding the position of the
3607// first in the expr enum. Note: This only works for binary operators.
Denys Vlasenko0154d782018-12-14 23:32:51 +01003608#define BC_TOKEN_2_INST(t) ((char) ((t) - BC_LEX_NEG + BC_INST_NEG))
Denys Vlasenkocca79a02018-12-05 21:15:46 +01003609
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003610static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags);
3611
3612static BC_STATUS zbc_parse_expr(BcParse *p, uint8_t flags)
3613{
3614 BcStatus s;
3615
3616 s = bc_parse_expr_empty_ok(p, flags);
3617 if (s == BC_STATUS_PARSE_EMPTY_EXP)
3618 RETURN_STATUS(bc_error("empty expression"));
3619 RETURN_STATUS(s);
3620}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003621#define zbc_parse_expr(...) (zbc_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003622
3623static BC_STATUS zbc_parse_stmt_possibly_auto(BcParse *p, bool auto_allowed);
Denys Vlasenkoec603182018-12-17 10:34:02 +01003624#define zbc_parse_stmt_possibly_auto(...) (zbc_parse_stmt_possibly_auto(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01003625
3626static BC_STATUS zbc_parse_stmt(BcParse *p)
3627{
3628 RETURN_STATUS(zbc_parse_stmt_possibly_auto(p, false));
3629}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003630#define zbc_parse_stmt(...) (zbc_parse_stmt(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003631
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003632static BC_STATUS zbc_parse_stmt_allow_NLINE_before(BcParse *p, const char *after_X)
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003633{
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003634 // "if(cond)<newline>stmt" is accepted too, but not 2+ newlines.
3635 // Same for "else", "while()", "for()".
3636 BcStatus s = zbc_lex_next_and_skip_NLINE(&p->l);
3637 if (s) RETURN_STATUS(s);
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003638 if (p->l.t.t == BC_LEX_NLINE)
3639 RETURN_STATUS(bc_error_fmt("no statement after '%s'", after_X));
Denys Vlasenko94f72a32018-12-17 00:07:48 +01003640
3641 RETURN_STATUS(zbc_parse_stmt(p));
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003642}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003643#define zbc_parse_stmt_allow_NLINE_before(...) (zbc_parse_stmt_allow_NLINE_before(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko2e8be022018-12-16 20:41:32 +01003644
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003645static void bc_parse_operator(BcParse *p, BcLexType type, size_t start,
3646 size_t *nexprs)
Gavin Howard01055ba2018-11-03 11:00:21 -06003647{
Denys Vlasenko65437582018-12-05 19:37:19 +01003648 char l, r = bc_parse_op_PREC(type - BC_LEX_OP_INC);
3649 bool left = bc_parse_op_LEFT(type - BC_LEX_OP_INC);
Gavin Howard01055ba2018-11-03 11:00:21 -06003650
3651 while (p->ops.len > start) {
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003652 BcLexType t = BC_PARSE_TOP_OP(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06003653 if (t == BC_LEX_LPAREN) break;
3654
Denys Vlasenko65437582018-12-05 19:37:19 +01003655 l = bc_parse_op_PREC(t - BC_LEX_OP_INC);
Gavin Howard01055ba2018-11-03 11:00:21 -06003656 if (l >= r && (l != r || !left)) break;
3657
Denys Vlasenko0154d782018-12-14 23:32:51 +01003658 bc_parse_push(p, BC_TOKEN_2_INST(t));
Gavin Howard01055ba2018-11-03 11:00:21 -06003659 bc_vec_pop(&p->ops);
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003660 *nexprs -= (t != BC_LEX_OP_BOOL_NOT && t != BC_LEX_NEG);
Gavin Howard01055ba2018-11-03 11:00:21 -06003661 }
3662
3663 bc_vec_push(&p->ops, &type);
Gavin Howard01055ba2018-11-03 11:00:21 -06003664}
3665
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003666static BC_STATUS zbc_parse_rightParen(BcParse *p, size_t ops_bgn, size_t *nexs)
Gavin Howard01055ba2018-11-03 11:00:21 -06003667{
3668 BcLexType top;
3669
Denys Vlasenko60cf7472018-12-04 20:05:28 +01003670 if (p->ops.len <= ops_bgn)
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003671 RETURN_STATUS(bc_error_bad_expression());
Gavin Howard01055ba2018-11-03 11:00:21 -06003672 top = BC_PARSE_TOP_OP(p);
3673
3674 while (top != BC_LEX_LPAREN) {
Denys Vlasenko0154d782018-12-14 23:32:51 +01003675 bc_parse_push(p, BC_TOKEN_2_INST(top));
Gavin Howard01055ba2018-11-03 11:00:21 -06003676
3677 bc_vec_pop(&p->ops);
3678 *nexs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_NEG;
3679
Denys Vlasenko60cf7472018-12-04 20:05:28 +01003680 if (p->ops.len <= ops_bgn)
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003681 RETURN_STATUS(bc_error_bad_expression());
Gavin Howard01055ba2018-11-03 11:00:21 -06003682 top = BC_PARSE_TOP_OP(p);
3683 }
3684
3685 bc_vec_pop(&p->ops);
3686
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003687 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003688}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003689#define zbc_parse_rightParen(...) (zbc_parse_rightParen(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003690
Denys Vlasenko26819db2018-12-12 16:08:46 +01003691static BC_STATUS zbc_parse_params(BcParse *p, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003692{
3693 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06003694 size_t nparams;
3695
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01003696 dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003697 flags = (flags & ~(BC_PARSE_PRINT | BC_PARSE_REL)) | BC_PARSE_ARRAY;
3698
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003699 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003700 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003701
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003702 nparams = 0;
3703 if (p->l.t.t != BC_LEX_RPAREN) {
3704 for (;;) {
3705 s = zbc_parse_expr(p, flags);
3706 if (s) RETURN_STATUS(s);
3707 nparams++;
3708 if (p->l.t.t != BC_LEX_COMMA) {
3709 if (p->l.t.t == BC_LEX_RPAREN)
3710 break;
3711 RETURN_STATUS(bc_error_bad_token());
3712 }
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003713 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003714 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003715 }
3716 }
3717
Gavin Howard01055ba2018-11-03 11:00:21 -06003718 bc_parse_push(p, BC_INST_CALL);
3719 bc_parse_pushIndex(p, nparams);
3720
Denys Vlasenko26819db2018-12-12 16:08:46 +01003721 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003722}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003723#define zbc_parse_params(...) (zbc_parse_params(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003724
Denys Vlasenko26819db2018-12-12 16:08:46 +01003725static BC_STATUS zbc_parse_call(BcParse *p, char *name, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003726{
3727 BcStatus s;
3728 BcId entry, *entry_ptr;
3729 size_t idx;
3730
3731 entry.name = name;
3732
Denys Vlasenko26819db2018-12-12 16:08:46 +01003733 s = zbc_parse_params(p, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06003734 if (s) goto err;
3735
3736 if (p->l.t.t != BC_LEX_RPAREN) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003737 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003738 goto err;
3739 }
3740
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003741 idx = bc_map_index(&G.prog.fn_map, &entry);
Gavin Howard01055ba2018-11-03 11:00:21 -06003742
3743 if (idx == BC_VEC_INVALID_IDX) {
3744 name = xstrdup(entry.name);
3745 bc_parse_addFunc(p, name, &idx);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003746 idx = bc_map_index(&G.prog.fn_map, &entry);
Gavin Howard01055ba2018-11-03 11:00:21 -06003747 free(entry.name);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003748 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06003749 free(name);
3750
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003751 entry_ptr = bc_vec_item(&G.prog.fn_map, idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06003752 bc_parse_pushIndex(p, entry_ptr->idx);
3753
Denys Vlasenko26819db2018-12-12 16:08:46 +01003754 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003755
3756err:
3757 free(name);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003758 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003759}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003760#define zbc_parse_call(...) (zbc_parse_call(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003761
Denys Vlasenko26819db2018-12-12 16:08:46 +01003762static BC_STATUS zbc_parse_name(BcParse *p, BcInst *type, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003763{
3764 BcStatus s;
3765 char *name;
3766
3767 name = xstrdup(p->l.t.v.v);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003768 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003769 if (s) goto err;
3770
3771 if (p->l.t.t == BC_LEX_LBRACKET) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003772 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003773 if (s) goto err;
3774
3775 if (p->l.t.t == BC_LEX_RBRACKET) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003776 if (!(flags & BC_PARSE_ARRAY)) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003777 s = bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06003778 goto err;
3779 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003780 *type = BC_INST_ARRAY;
Denys Vlasenko26819db2018-12-12 16:08:46 +01003781 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003782 *type = BC_INST_ARRAY_ELEM;
Gavin Howard01055ba2018-11-03 11:00:21 -06003783 flags &= ~(BC_PARSE_PRINT | BC_PARSE_REL);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003784 s = zbc_parse_expr(p, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06003785 if (s) goto err;
3786 }
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 bc_parse_push(p, *type);
3790 bc_parse_pushName(p, name);
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01003791 free(name);
Gavin Howard01055ba2018-11-03 11:00:21 -06003792 }
3793 else if (p->l.t.t == BC_LEX_LPAREN) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003794 if (flags & BC_PARSE_NOCALL) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003795 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003796 goto err;
3797 }
Gavin Howard01055ba2018-11-03 11:00:21 -06003798 *type = BC_INST_CALL;
Denys Vlasenko26819db2018-12-12 16:08:46 +01003799 s = zbc_parse_call(p, name, flags);
3800 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003801 *type = BC_INST_VAR;
3802 bc_parse_push(p, BC_INST_VAR);
3803 bc_parse_pushName(p, name);
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01003804 free(name);
Gavin Howard01055ba2018-11-03 11:00:21 -06003805 }
3806
Denys Vlasenko26819db2018-12-12 16:08:46 +01003807 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003808
3809err:
3810 free(name);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003811 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003812}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003813#define zbc_parse_name(...) (zbc_parse_name(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003814
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003815static BC_STATUS zbc_parse_read(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003816{
3817 BcStatus s;
3818
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003819 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003820 if (s) RETURN_STATUS(s);
3821 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003822
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003823 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003824 if (s) RETURN_STATUS(s);
3825 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003826
3827 bc_parse_push(p, BC_INST_READ);
3828
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003829 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003830}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003831#define zbc_parse_read(...) (zbc_parse_read(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003832
Denys Vlasenko26819db2018-12-12 16:08:46 +01003833static BC_STATUS zbc_parse_builtin(BcParse *p, BcLexType type, uint8_t flags,
Gavin Howard01055ba2018-11-03 11:00:21 -06003834 BcInst *prev)
3835{
3836 BcStatus s;
3837
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003838 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003839 if (s) RETURN_STATUS(s);
3840 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003841
3842 flags = (flags & ~(BC_PARSE_PRINT | BC_PARSE_REL)) | BC_PARSE_ARRAY;
3843
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003844 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003845 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003846
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003847 s = zbc_parse_expr(p, flags);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003848 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003849
Denys Vlasenko26819db2018-12-12 16:08:46 +01003850 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003851
3852 *prev = (type == BC_LEX_KEY_LENGTH) ? BC_INST_LENGTH : BC_INST_SQRT;
3853 bc_parse_push(p, *prev);
3854
Denys Vlasenko26819db2018-12-12 16:08:46 +01003855 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003856}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003857#define zbc_parse_builtin(...) (zbc_parse_builtin(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003858
Denys Vlasenko26819db2018-12-12 16:08:46 +01003859static BC_STATUS zbc_parse_scale(BcParse *p, BcInst *type, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06003860{
3861 BcStatus s;
3862
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003863 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003864 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003865
3866 if (p->l.t.t != BC_LEX_LPAREN) {
3867 *type = BC_INST_SCALE;
3868 bc_parse_push(p, BC_INST_SCALE);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003869 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06003870 }
3871
3872 *type = BC_INST_SCALE_FUNC;
3873 flags &= ~(BC_PARSE_PRINT | BC_PARSE_REL);
3874
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003875 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003876 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003877
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003878 s = zbc_parse_expr(p, flags);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003879 if (s) RETURN_STATUS(s);
3880 if (p->l.t.t != BC_LEX_RPAREN)
3881 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06003882 bc_parse_push(p, BC_INST_SCALE_FUNC);
3883
Denys Vlasenko26819db2018-12-12 16:08:46 +01003884 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003885}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003886#define zbc_parse_scale(...) (zbc_parse_scale(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003887
Denys Vlasenko26819db2018-12-12 16:08:46 +01003888static BC_STATUS zbc_parse_incdec(BcParse *p, BcInst *prev, bool *paren_expr,
Gavin Howard01055ba2018-11-03 11:00:21 -06003889 size_t *nexprs, uint8_t flags)
3890{
3891 BcStatus s;
3892 BcLexType type;
3893 char inst;
3894 BcInst etype = *prev;
3895
3896 if (etype == BC_INST_VAR || etype == BC_INST_ARRAY_ELEM ||
3897 etype == BC_INST_SCALE || etype == BC_INST_LAST ||
3898 etype == BC_INST_IBASE || etype == BC_INST_OBASE)
3899 {
3900 *prev = inst = BC_INST_INC_POST + (p->l.t.t != BC_LEX_OP_INC);
3901 bc_parse_push(p, inst);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003902 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003903 }
3904 else {
Gavin Howard01055ba2018-11-03 11:00:21 -06003905 *prev = inst = BC_INST_INC_PRE + (p->l.t.t != BC_LEX_OP_INC);
3906 *paren_expr = true;
3907
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003908 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003909 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003910 type = p->l.t.t;
3911
3912 // Because we parse the next part of the expression
3913 // right here, we need to increment this.
3914 *nexprs = *nexprs + 1;
3915
3916 switch (type) {
Gavin Howard01055ba2018-11-03 11:00:21 -06003917 case BC_LEX_NAME:
Denys Vlasenko26819db2018-12-12 16:08:46 +01003918 s = zbc_parse_name(p, prev, flags | BC_PARSE_NOCALL);
Gavin Howard01055ba2018-11-03 11:00:21 -06003919 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003920 case BC_LEX_KEY_IBASE:
3921 case BC_LEX_KEY_LAST:
3922 case BC_LEX_KEY_OBASE:
Gavin Howard01055ba2018-11-03 11:00:21 -06003923 bc_parse_push(p, type - BC_LEX_KEY_IBASE + BC_INST_IBASE);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003924 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06003925 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003926 case BC_LEX_KEY_SCALE:
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003927 s = zbc_lex_next(&p->l);
Denys Vlasenko26819db2018-12-12 16:08:46 +01003928 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003929 if (p->l.t.t == BC_LEX_LPAREN)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003930 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003931 else
3932 bc_parse_push(p, BC_INST_SCALE);
3933 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003934 default:
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01003935 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06003936 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06003937 }
3938
3939 if (!s) bc_parse_push(p, inst);
3940 }
3941
Denys Vlasenko26819db2018-12-12 16:08:46 +01003942 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003943}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003944#define zbc_parse_incdec(...) (zbc_parse_incdec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003945
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003946static BC_STATUS zbc_parse_minus(BcParse *p, BcInst *prev, size_t ops_bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06003947 bool rparen, size_t *nexprs)
3948{
3949 BcStatus s;
3950 BcLexType type;
3951 BcInst etype = *prev;
3952
Denys Vlasenko9a34e892018-12-12 13:58:55 +01003953 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003954 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003955
3956 type = rparen || etype == BC_INST_INC_POST || etype == BC_INST_DEC_POST ||
3957 (etype >= BC_INST_NUM && etype <= BC_INST_SQRT) ?
3958 BC_LEX_OP_MINUS :
3959 BC_LEX_NEG;
Denys Vlasenko0154d782018-12-14 23:32:51 +01003960 *prev = BC_TOKEN_2_INST(type);
Gavin Howard01055ba2018-11-03 11:00:21 -06003961
3962 // We can just push onto the op stack because this is the largest
3963 // precedence operator that gets pushed. Inc/dec does not.
3964 if (type != BC_LEX_OP_MINUS)
3965 bc_vec_push(&p->ops, &type);
3966 else
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01003967 bc_parse_operator(p, type, ops_bgn, nexprs);
Gavin Howard01055ba2018-11-03 11:00:21 -06003968
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003969 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06003970}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003971#define zbc_parse_minus(...) (zbc_parse_minus(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003972
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003973static BC_STATUS zbc_parse_string(BcParse *p, char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06003974{
3975 char *str = xstrdup(p->l.t.v.v);
3976
3977 bc_parse_push(p, BC_INST_STR);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01003978 bc_parse_pushIndex(p, G.prog.strs.len);
3979 bc_vec_push(&G.prog.strs, &str);
Gavin Howard01055ba2018-11-03 11:00:21 -06003980 bc_parse_push(p, inst);
3981
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003982 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06003983}
Denys Vlasenkoec603182018-12-17 10:34:02 +01003984#define zbc_parse_string(...) (zbc_parse_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06003985
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01003986static BC_STATUS zbc_parse_print(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06003987{
3988 BcStatus s;
3989 BcLexType type;
Gavin Howard01055ba2018-11-03 11:00:21 -06003990
Denys Vlasenko5d18f6b2018-12-16 21:08:30 +01003991 for (;;) {
3992 s = zbc_lex_next(&p->l);
3993 if (s) RETURN_STATUS(s);
3994 type = p->l.t.t;
Denys Vlasenkoebc41c92018-12-08 23:36:28 +01003995 if (type == BC_LEX_STR) {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01003996 s = zbc_parse_string(p, BC_INST_PRINT_POP);
Denys Vlasenkoebc41c92018-12-08 23:36:28 +01003997 } else {
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01003998 s = zbc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06003999 bc_parse_push(p, BC_INST_PRINT_POP);
4000 }
Denys Vlasenko5d18f6b2018-12-16 21:08:30 +01004001 if (s) RETURN_STATUS(s);
4002 if (p->l.t.t != BC_LEX_COMMA)
4003 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004004 }
4005
Denys Vlasenko5d18f6b2018-12-16 21:08:30 +01004006 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004007}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004008#define zbc_parse_print(...) (zbc_parse_print(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004009
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004010static BC_STATUS zbc_parse_return(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004011{
4012 BcStatus s;
4013 BcLexType t;
Gavin Howard01055ba2018-11-03 11:00:21 -06004014
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004015 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004016 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004017 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004018
4019 t = p->l.t.t;
Gavin Howard01055ba2018-11-03 11:00:21 -06004020 if (t == BC_LEX_NLINE || t == BC_LEX_SCOLON)
4021 bc_parse_push(p, BC_INST_RET0);
4022 else {
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004023 bool paren = (t == BC_LEX_LPAREN);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004024 s = bc_parse_expr_empty_ok(p, 0);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004025 if (s == BC_STATUS_PARSE_EMPTY_EXP) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004026 bc_parse_push(p, BC_INST_RET0);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004027 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004028 }
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004029 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004030
4031 if (!paren || p->l.t.last != BC_LEX_RPAREN) {
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01004032 s = bc_POSIX_requires("parentheses around return expressions");
Denys Vlasenkoec603182018-12-17 10:34:02 +01004033 IF_ERROR_RETURN_POSSIBLE(if (s) RETURN_STATUS(s));
Gavin Howard01055ba2018-11-03 11:00:21 -06004034 }
4035
4036 bc_parse_push(p, BC_INST_RET);
4037 }
4038
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004039 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004040 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004041}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004042#define zbc_parse_return(...) (zbc_parse_return(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004043
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004044static void rewrite_label_to_current(BcParse *p, size_t idx)
4045{
4046 size_t *label = bc_vec_item(&p->func->labels, idx);
4047 *label = p->func->code.len;
4048}
4049
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004050static BC_STATUS zbc_parse_if(BcParse *p)
4051{
4052 BcStatus s;
Denys Vlasenko15850832018-12-16 21:40:54 +01004053 size_t ip_idx;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004054
4055 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
4056 s = zbc_lex_next(&p->l);
4057 if (s) RETURN_STATUS(s);
4058 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
4059
4060 s = zbc_lex_next(&p->l);
4061 if (s) RETURN_STATUS(s);
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004062 s = zbc_parse_expr(p, BC_PARSE_REL);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004063 if (s) RETURN_STATUS(s);
4064
4065 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004066
Denys Vlasenko15850832018-12-16 21:40:54 +01004067 ip_idx = p->func->labels.len;
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004068 bc_parse_pushJUMP_ZERO(p, ip_idx);
Denys Vlasenko15850832018-12-16 21:40:54 +01004069 bc_vec_push(&p->func->labels, &ip_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004070
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004071 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_if);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004072 if (s) RETURN_STATUS(s);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004073
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004074 dbg_lex("%s:%d in if after stmt: p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
4075 if (p->l.t.t == BC_LEX_KEY_ELSE) {
Denys Vlasenko15850832018-12-16 21:40:54 +01004076 size_t ip2_idx;
Denys Vlasenko74156332018-12-16 21:21:27 +01004077
Denys Vlasenko15850832018-12-16 21:40:54 +01004078 ip2_idx = p->func->labels.len;
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004079
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004080 dbg_lex("%s:%d after if() body: BC_INST_JUMP to %zd", __func__, __LINE__, ip2_idx);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004081 bc_parse_pushJUMP(p, ip2_idx);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004082
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004083 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 +01004084 rewrite_label_to_current(p, ip_idx);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004085
Denys Vlasenko15850832018-12-16 21:40:54 +01004086 bc_vec_push(&p->func->labels, &ip2_idx);
4087 ip_idx = ip2_idx;
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004088
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004089 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_else);
Denys Vlasenkoa50576a2018-12-16 19:21:57 +01004090 if (s) RETURN_STATUS(s);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004091 }
4092
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004093 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 +01004094 rewrite_label_to_current(p, ip_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004095
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004096 dbg_lex_done("%s:%d done", __func__, __LINE__);
4097 RETURN_STATUS(s);
4098}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004099#define zbc_parse_if(...) (zbc_parse_if(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004100
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004101static BC_STATUS zbc_parse_while(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004102{
4103 BcStatus s;
Denys Vlasenkode24e9d2018-12-16 23:02:22 +01004104 size_t cond_idx;
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004105 size_t ip_idx;
Gavin Howard01055ba2018-11-03 11:00:21 -06004106
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004107 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004108 if (s) RETURN_STATUS(s);
4109 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004110 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004111 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004112
Denys Vlasenkode24e9d2018-12-16 23:02:22 +01004113 cond_idx = p->func->labels.len;
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004114 ip_idx = cond_idx + 1;
Gavin Howard01055ba2018-11-03 11:00:21 -06004115
4116 bc_vec_push(&p->func->labels, &p->func->code.len);
Denys Vlasenkode24e9d2018-12-16 23:02:22 +01004117 bc_vec_push(&p->conds, &cond_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004118
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004119 bc_vec_push(&p->exits, &ip_idx);
4120 bc_vec_push(&p->func->labels, &ip_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004121
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004122 s = zbc_parse_expr(p, BC_PARSE_REL);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004123 if (s) RETURN_STATUS(s);
4124 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko202dd192018-12-16 17:30:35 +01004125
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004126 bc_parse_pushJUMP_ZERO(p, ip_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004127
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004128 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_while);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004129 if (s) RETURN_STATUS(s);
4130
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004131 dbg_lex("%s:%d BC_INST_JUMP to %zd", __func__, __LINE__, cond_idx);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004132 bc_parse_pushJUMP(p, cond_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004133
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004134 dbg_lex("%s:%d rewriting label-> %zd", __func__, __LINE__, p->func->code.len);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004135 rewrite_label_to_current(p, ip_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004136
4137 bc_vec_pop(&p->exits);
4138 bc_vec_pop(&p->conds);
4139
4140 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004141}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004142#define zbc_parse_while(...) (zbc_parse_while(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004143
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004144static BC_STATUS zbc_parse_for(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004145{
4146 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06004147 size_t cond_idx, exit_idx, body_idx, update_idx;
4148
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004149 dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004150 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004151 if (s) RETURN_STATUS(s);
4152 if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004153 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004154 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004155
4156 if (p->l.t.t != BC_LEX_SCOLON)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004157 s = zbc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004158 else
Denys Vlasenko00646792018-12-05 18:12:27 +01004159 s = bc_POSIX_does_not_allow_empty_X_expression_in_for("init");
Gavin Howard01055ba2018-11-03 11:00:21 -06004160
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004161 if (s) RETURN_STATUS(s);
4162 if (p->l.t.t != BC_LEX_SCOLON) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004163 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004164 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004165
4166 cond_idx = p->func->labels.len;
4167 update_idx = cond_idx + 1;
4168 body_idx = update_idx + 1;
4169 exit_idx = body_idx + 1;
4170
4171 bc_vec_push(&p->func->labels, &p->func->code.len);
4172
4173 if (p->l.t.t != BC_LEX_SCOLON)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004174 s = zbc_parse_expr(p, BC_PARSE_REL);
Gavin Howard01055ba2018-11-03 11:00:21 -06004175 else
Denys Vlasenko00646792018-12-05 18:12:27 +01004176 s = bc_POSIX_does_not_allow_empty_X_expression_in_for("condition");
Gavin Howard01055ba2018-11-03 11:00:21 -06004177
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004178 if (s) RETURN_STATUS(s);
4179 if (p->l.t.t != BC_LEX_SCOLON) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004180
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004181 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004182 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004183
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004184 bc_parse_pushJUMP_ZERO(p, exit_idx);
4185 bc_parse_pushJUMP(p, body_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004186
Gavin Howard01055ba2018-11-03 11:00:21 -06004187 bc_vec_push(&p->conds, &update_idx);
4188 bc_vec_push(&p->func->labels, &p->func->code.len);
4189
4190 if (p->l.t.t != BC_LEX_RPAREN)
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004191 s = zbc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004192 else
Denys Vlasenko00646792018-12-05 18:12:27 +01004193 s = bc_POSIX_does_not_allow_empty_X_expression_in_for("update");
Gavin Howard01055ba2018-11-03 11:00:21 -06004194
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004195 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004196
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004197 if (p->l.t.t != BC_LEX_RPAREN) RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004198 bc_parse_pushJUMP(p, cond_idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06004199 bc_vec_push(&p->func->labels, &p->func->code.len);
4200
Denys Vlasenko5ebd2a62018-12-16 23:35:04 +01004201 bc_vec_push(&p->exits, &exit_idx);
4202 bc_vec_push(&p->func->labels, &exit_idx);
Denys Vlasenko202dd192018-12-16 17:30:35 +01004203
Denys Vlasenko59d4ce92018-12-17 10:42:31 +01004204 s = zbc_parse_stmt_allow_NLINE_before(p, STRING_for);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004205 if (s) RETURN_STATUS(s);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004206
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004207 dbg_lex("%s:%d BC_INST_JUMP to %zd", __func__, __LINE__, update_idx);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004208 bc_parse_pushJUMP(p, update_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004209
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004210 dbg_lex("%s:%d rewriting label-> %zd", __func__, __LINE__, p->func->code.len);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004211 rewrite_label_to_current(p, exit_idx);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004212
4213 bc_vec_pop(&p->exits);
4214 bc_vec_pop(&p->conds);
Gavin Howard01055ba2018-11-03 11:00:21 -06004215
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004216 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06004217}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004218#define zbc_parse_for(...) (zbc_parse_for(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004219
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004220static BC_STATUS zbc_parse_break_or_continue(BcParse *p, BcLexType type)
Gavin Howard01055ba2018-11-03 11:00:21 -06004221{
4222 BcStatus s;
4223 size_t i;
Gavin Howard01055ba2018-11-03 11:00:21 -06004224
Gavin Howard01055ba2018-11-03 11:00:21 -06004225 if (type == BC_LEX_KEY_BREAK) {
Denys Vlasenko8e7686e2018-12-16 23:18:28 +01004226 if (p->exits.len == 0) // none of the enclosing blocks is a loop
4227 RETURN_STATUS(bc_error_bad_token());
Denys Vlasenko266aa002018-12-16 23:24:25 +01004228 i = *(size_t*)bc_vec_top(&p->exits);
Denys Vlasenko8e7686e2018-12-16 23:18:28 +01004229 } else {
Denys Vlasenko266aa002018-12-16 23:24:25 +01004230 i = *(size_t*)bc_vec_top(&p->conds);
Denys Vlasenko8e7686e2018-12-16 23:18:28 +01004231 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004232
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004233 bc_parse_pushJUMP(p, i);
Gavin Howard01055ba2018-11-03 11:00:21 -06004234
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004235 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004236 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004237
4238 if (p->l.t.t != BC_LEX_SCOLON && p->l.t.t != BC_LEX_NLINE)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004239 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004240
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004241 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004242}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004243#define zbc_parse_break_or_continue(...) (zbc_parse_break_or_continue(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004244
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004245static BC_STATUS zbc_parse_funcdef(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004246{
4247 BcStatus s;
4248 bool var, comma = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06004249 char *name;
4250
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004251 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004252 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004253 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004254 if (p->l.t.t != BC_LEX_NAME)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004255 RETURN_STATUS(bc_error("bad function definition"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004256
4257 name = xstrdup(p->l.t.v.v);
4258 bc_parse_addFunc(p, name, &p->fidx);
4259
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004260 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004261 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004262 if (p->l.t.t != BC_LEX_LPAREN)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004263 RETURN_STATUS(bc_error("bad function definition"));
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004264 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004265 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004266
4267 while (p->l.t.t != BC_LEX_RPAREN) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004268 if (p->l.t.t != BC_LEX_NAME)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004269 RETURN_STATUS(bc_error("bad function definition"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004270
4271 ++p->func->nparams;
4272
4273 name = xstrdup(p->l.t.v.v);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004274 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004275 if (s) goto err;
4276
4277 var = p->l.t.t != BC_LEX_LBRACKET;
4278
4279 if (!var) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004280 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004281 if (s) goto err;
4282
4283 if (p->l.t.t != BC_LEX_RBRACKET) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004284 s = bc_error("bad function definition");
Gavin Howard01055ba2018-11-03 11:00:21 -06004285 goto err;
4286 }
4287
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004288 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004289 if (s) goto err;
4290 }
4291
4292 comma = p->l.t.t == BC_LEX_COMMA;
4293 if (comma) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004294 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004295 if (s) goto err;
4296 }
4297
Denys Vlasenko29301232018-12-11 15:29:32 +01004298 s = zbc_func_insert(p->func, name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06004299 if (s) goto err;
4300 }
4301
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004302 if (comma) RETURN_STATUS(bc_error("bad function definition"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004303
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004304 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004305 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004306
4307 if (p->l.t.t != BC_LEX_LBRACE)
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01004308 s = bc_POSIX_requires("the left brace be on the same line as the function header");
Gavin Howard01055ba2018-11-03 11:00:21 -06004309
Denys Vlasenko202dd192018-12-16 17:30:35 +01004310 // Prevent "define z()<newline>" from being interpreted as function with empty stmt as body
4311 s = zbc_lex_skip_if_at_NLINE(&p->l);
4312 if (s) RETURN_STATUS(s);
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004313 //GNU bc requires a {} block even if function body has single stmt, enforce this?
4314 if (p->l.t.t != BC_LEX_LBRACE)
4315 RETURN_STATUS(bc_error("function { body } expected"));
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004316
4317 p->in_funcdef++; // to determine whether "return" stmt is allowed, and such
Denys Vlasenko94f72a32018-12-17 00:07:48 +01004318 s = zbc_parse_stmt_possibly_auto(p, true);
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004319 p->in_funcdef--;
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004320 if (s) RETURN_STATUS(s);
4321
4322 bc_parse_push(p, BC_INST_RET0);
4323 bc_parse_updateFunc(p, BC_PROG_MAIN);
4324
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004325 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004326 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004327
4328err:
Denys Vlasenkof4f10722018-12-18 02:23:53 +01004329 dbg_lex_done("%s:%d done (error)", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004330 free(name);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004331 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004332}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004333#define zbc_parse_funcdef(...) (zbc_parse_funcdef(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004334
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004335static BC_STATUS zbc_parse_auto(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004336{
4337 BcStatus s;
4338 bool comma, var, one;
4339 char *name;
4340
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004341 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004342 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004343 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004344
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004345 comma = false;
Gavin Howard01055ba2018-11-03 11:00:21 -06004346 one = p->l.t.t == BC_LEX_NAME;
4347
4348 while (p->l.t.t == BC_LEX_NAME) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004349 name = xstrdup(p->l.t.v.v);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004350 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004351 if (s) goto err;
4352
4353 var = p->l.t.t != BC_LEX_LBRACKET;
4354 if (!var) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004355 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004356 if (s) goto err;
4357
4358 if (p->l.t.t != BC_LEX_RBRACKET) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004359 s = bc_error("bad function definition");
Gavin Howard01055ba2018-11-03 11:00:21 -06004360 goto err;
4361 }
4362
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004363 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004364 if (s) goto err;
4365 }
4366
4367 comma = p->l.t.t == BC_LEX_COMMA;
4368 if (comma) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004369 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004370 if (s) goto err;
4371 }
4372
Denys Vlasenko29301232018-12-11 15:29:32 +01004373 s = zbc_func_insert(p->func, name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06004374 if (s) goto err;
4375 }
4376
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004377 if (comma) RETURN_STATUS(bc_error("bad function definition"));
4378 if (!one) RETURN_STATUS(bc_error("no auto variable found"));
Gavin Howard01055ba2018-11-03 11:00:21 -06004379
4380 if (p->l.t.t != BC_LEX_NLINE && p->l.t.t != BC_LEX_SCOLON)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004381 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004382
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004383 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004384 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004385
4386err:
4387 free(name);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004388 dbg_lex_done("%s:%d done (ERROR)", __func__, __LINE__);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004389 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004390}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004391#define zbc_parse_auto(...) (zbc_parse_auto(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004392
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004393#undef zbc_parse_stmt_possibly_auto
4394static BC_STATUS zbc_parse_stmt_possibly_auto(BcParse *p, bool auto_allowed)
Gavin Howard01055ba2018-11-03 11:00:21 -06004395{
4396 BcStatus s = BC_STATUS_SUCCESS;
4397
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004398 dbg_lex_enter("%s:%d entered, p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06004399
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004400 if (p->l.t.t == BC_LEX_NLINE) {
4401 dbg_lex_done("%s:%d done (seen BC_LEX_NLINE)", __func__, __LINE__);
4402 RETURN_STATUS(zbc_lex_next(&p->l));
4403 }
4404 if (p->l.t.t == BC_LEX_SCOLON) {
4405 dbg_lex_done("%s:%d done (seen BC_LEX_SCOLON)", __func__, __LINE__);
4406 RETURN_STATUS(zbc_lex_next(&p->l));
4407 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004408
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004409 if (p->l.t.t == BC_LEX_LBRACE) {
4410 dbg_lex("%s:%d BC_LEX_LBRACE: (auto_allowed:%d)", __func__, __LINE__, auto_allowed);
4411 do {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004412 s = zbc_lex_next(&p->l);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004413 if (s) RETURN_STATUS(s);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004414 } while (p->l.t.t == BC_LEX_NLINE);
4415 if (auto_allowed && p->l.t.t == BC_LEX_KEY_AUTO) {
4416 dbg_lex("%s:%d calling zbc_parse_auto()", __func__, __LINE__);
4417 s = zbc_parse_auto(p);
4418 if (s) RETURN_STATUS(s);
4419 }
4420 while (p->l.t.t != BC_LEX_RBRACE) {
4421 dbg_lex("%s:%d block parsing loop", __func__, __LINE__);
4422 s = zbc_parse_stmt(p);
4423 if (s) RETURN_STATUS(s);
4424 }
4425 s = zbc_lex_next(&p->l);
4426 dbg_lex_done("%s:%d done (seen BC_LEX_RBRACE)", __func__, __LINE__);
4427 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004428 }
4429
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004430 dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06004431 switch (p->l.t.t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004432 case BC_LEX_OP_INC:
4433 case BC_LEX_OP_DEC:
4434 case BC_LEX_OP_MINUS:
4435 case BC_LEX_OP_BOOL_NOT:
4436 case BC_LEX_LPAREN:
4437 case BC_LEX_NAME:
4438 case BC_LEX_NUMBER:
4439 case BC_LEX_KEY_IBASE:
4440 case BC_LEX_KEY_LAST:
4441 case BC_LEX_KEY_LENGTH:
4442 case BC_LEX_KEY_OBASE:
4443 case BC_LEX_KEY_READ:
4444 case BC_LEX_KEY_SCALE:
4445 case BC_LEX_KEY_SQRT:
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004446 s = zbc_parse_expr(p, BC_PARSE_PRINT);
Gavin Howard01055ba2018-11-03 11:00:21 -06004447 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004448 case BC_LEX_STR:
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004449 s = zbc_parse_string(p, BC_INST_PRINT_STR);
Gavin Howard01055ba2018-11-03 11:00:21 -06004450 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004451 case BC_LEX_KEY_BREAK:
4452 case BC_LEX_KEY_CONTINUE:
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004453 s = zbc_parse_break_or_continue(p, p->l.t.t);
Gavin Howard01055ba2018-11-03 11:00:21 -06004454 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004455 case BC_LEX_KEY_FOR:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004456 s = zbc_parse_for(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004457 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004458 case BC_LEX_KEY_HALT:
Gavin Howard01055ba2018-11-03 11:00:21 -06004459 bc_parse_push(p, BC_INST_HALT);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004460 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004461 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004462 case BC_LEX_KEY_IF:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004463 s = zbc_parse_if(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004464 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004465 case BC_LEX_KEY_LIMITS:
Denys Vlasenkocfdc1332018-12-03 14:02:35 +01004466 // "limits" is a compile-time command,
4467 // the output is produced at _parse time_.
Denys Vlasenko64074a12018-12-07 15:50:14 +01004468 printf(
4469 "BC_BASE_MAX = "BC_MAX_OBASE_STR "\n"
4470 "BC_DIM_MAX = "BC_MAX_DIM_STR "\n"
4471 "BC_SCALE_MAX = "BC_MAX_SCALE_STR "\n"
4472 "BC_STRING_MAX = "BC_MAX_STRING_STR"\n"
4473 "BC_NAME_MAX = "BC_MAX_NAME_STR "\n"
4474 "BC_NUM_MAX = "BC_MAX_NUM_STR "\n"
4475 "MAX Exponent = "BC_MAX_EXP_STR "\n"
4476 "Number of vars = "BC_MAX_VARS_STR "\n"
4477 );
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004478 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004479 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004480 case BC_LEX_KEY_PRINT:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004481 s = zbc_parse_print(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004482 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004483 case BC_LEX_KEY_QUIT:
Denys Vlasenkocfdc1332018-12-03 14:02:35 +01004484 // "quit" is a compile-time command. For example,
4485 // "if (0 == 1) quit" terminates when parsing the statement,
4486 // not when it is executed
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01004487 QUIT_OR_RETURN_TO_MAIN;
Gavin Howard01055ba2018-11-03 11:00:21 -06004488 case BC_LEX_KEY_RETURN:
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004489 if (!p->in_funcdef)
4490 RETURN_STATUS(bc_error("'return' not in a function"));
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004491 s = zbc_parse_return(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004492 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004493 case BC_LEX_KEY_WHILE:
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004494 s = zbc_parse_while(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004495 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004496 default:
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004497 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06004498 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004499 }
4500
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004501 if (s || G_interrupt) {
4502 bc_parse_reset(p);
4503 s = BC_STATUS_FAILURE;
4504 }
4505
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004506 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004507 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004508}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004509#define zbc_parse_stmt_possibly_auto(...) (zbc_parse_stmt_possibly_auto(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004510
Denys Vlasenko99b37622018-12-15 20:06:59 +01004511static BC_STATUS zbc_parse_stmt_or_funcdef(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004512{
4513 BcStatus s;
4514
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004515 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004516 if (p->l.t.t == BC_LEX_EOF)
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01004517 s = bc_error("end of file");
Gavin Howard01055ba2018-11-03 11:00:21 -06004518 else if (p->l.t.t == BC_LEX_KEY_DEFINE) {
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004519 dbg_lex("%s:%d p->l.t.t:BC_LEX_KEY_DEFINE", __func__, __LINE__);
Denys Vlasenkoe9519e42018-12-16 17:06:07 +01004520 s = zbc_parse_funcdef(p);
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004521 } else {
4522 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 +01004523 s = zbc_parse_stmt(p);
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004524 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004525
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01004526 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenko26819db2018-12-12 16:08:46 +01004527 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004528}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004529#define zbc_parse_stmt_or_funcdef(...) (zbc_parse_stmt_or_funcdef(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004530
Denys Vlasenkob402ff82018-12-11 15:45:15 +01004531// This is not a "z" function: can also return BC_STATUS_PARSE_EMPTY_EXP
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004532static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06004533{
4534 BcStatus s = BC_STATUS_SUCCESS;
4535 BcInst prev = BC_INST_PRINT;
4536 BcLexType top, t = p->l.t.t;
4537 size_t nexprs = 0, ops_bgn = p->ops.len;
Denys Vlasenko18c6b542018-12-07 12:57:32 +01004538 unsigned nparens, nrelops;
Gavin Howard01055ba2018-11-03 11:00:21 -06004539 bool paren_first, paren_expr, rprn, done, get_token, assign, bin_last;
4540
Denys Vlasenko17df8822018-12-14 23:00:24 +01004541 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004542 paren_first = p->l.t.t == BC_LEX_LPAREN;
4543 nparens = nrelops = 0;
4544 paren_expr = rprn = done = get_token = assign = false;
4545 bin_last = true;
4546
Denys Vlasenkobcb62a72018-12-05 20:17:48 +01004547 for (; !G_interrupt && !s && !done && bc_parse_exprs(t); t = p->l.t.t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004548 switch (t) {
4549
4550 case BC_LEX_OP_INC:
4551 case BC_LEX_OP_DEC:
4552 {
Denys Vlasenko26819db2018-12-12 16:08:46 +01004553 s = zbc_parse_incdec(p, &prev, &paren_expr, &nexprs, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06004554 rprn = get_token = bin_last = false;
4555 break;
4556 }
4557
4558 case BC_LEX_OP_MINUS:
4559 {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004560 s = zbc_parse_minus(p, &prev, ops_bgn, rprn, &nexprs);
Gavin Howard01055ba2018-11-03 11:00:21 -06004561 rprn = get_token = false;
4562 bin_last = prev == BC_INST_MINUS;
4563 break;
4564 }
4565
4566 case BC_LEX_OP_ASSIGN_POWER:
4567 case BC_LEX_OP_ASSIGN_MULTIPLY:
4568 case BC_LEX_OP_ASSIGN_DIVIDE:
4569 case BC_LEX_OP_ASSIGN_MODULUS:
4570 case BC_LEX_OP_ASSIGN_PLUS:
4571 case BC_LEX_OP_ASSIGN_MINUS:
4572 case BC_LEX_OP_ASSIGN:
4573 {
4574 if (prev != BC_INST_VAR && prev != BC_INST_ARRAY_ELEM &&
4575 prev != BC_INST_SCALE && prev != BC_INST_IBASE &&
4576 prev != BC_INST_OBASE && prev != BC_INST_LAST)
4577 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004578 s = bc_error("bad assignment:"
Denys Vlasenko0154d782018-12-14 23:32:51 +01004579 " left side must be variable"
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004580 " or array element"
Denys Vlasenko0154d782018-12-14 23:32:51 +01004581 ); // note: shared string
Gavin Howard01055ba2018-11-03 11:00:21 -06004582 break;
4583 }
4584 }
4585 // Fallthrough.
4586 case BC_LEX_OP_POWER:
4587 case BC_LEX_OP_MULTIPLY:
4588 case BC_LEX_OP_DIVIDE:
4589 case BC_LEX_OP_MODULUS:
4590 case BC_LEX_OP_PLUS:
4591 case BC_LEX_OP_REL_EQ:
4592 case BC_LEX_OP_REL_LE:
4593 case BC_LEX_OP_REL_GE:
4594 case BC_LEX_OP_REL_NE:
4595 case BC_LEX_OP_REL_LT:
4596 case BC_LEX_OP_REL_GT:
4597 case BC_LEX_OP_BOOL_NOT:
4598 case BC_LEX_OP_BOOL_OR:
4599 case BC_LEX_OP_BOOL_AND:
4600 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004601 if (((t == BC_LEX_OP_BOOL_NOT) != bin_last)
4602 || (t != BC_LEX_OP_BOOL_NOT && prev == BC_INST_BOOL_NOT)
4603 ) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004604 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004605 }
4606
4607 nrelops += t >= BC_LEX_OP_REL_EQ && t <= BC_LEX_OP_REL_GT;
Denys Vlasenko0154d782018-12-14 23:32:51 +01004608 prev = BC_TOKEN_2_INST(t);
Denys Vlasenko7b1df3d2018-12-14 23:12:48 +01004609 bc_parse_operator(p, t, ops_bgn, &nexprs);
4610 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004611 rprn = get_token = false;
4612 bin_last = t != BC_LEX_OP_BOOL_NOT;
4613
4614 break;
4615 }
4616
4617 case BC_LEX_LPAREN:
4618 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004619 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004620 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004621 ++nparens;
4622 paren_expr = rprn = bin_last = false;
4623 get_token = true;
4624 bc_vec_push(&p->ops, &t);
4625
4626 break;
4627 }
4628
4629 case BC_LEX_RPAREN:
4630 {
4631 if (bin_last || prev == BC_INST_BOOL_NOT)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004632 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004633
4634 if (nparens == 0) {
4635 s = BC_STATUS_SUCCESS;
4636 done = true;
4637 get_token = false;
4638 break;
4639 }
Denys Vlasenko17df8822018-12-14 23:00:24 +01004640 else if (!paren_expr) {
4641 dbg_lex_done("%s:%d done (returning EMPTY_EXP)", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004642 return BC_STATUS_PARSE_EMPTY_EXP;
Denys Vlasenko17df8822018-12-14 23:00:24 +01004643 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004644
4645 --nparens;
4646 paren_expr = rprn = true;
4647 get_token = bin_last = false;
4648
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004649 s = zbc_parse_rightParen(p, ops_bgn, &nexprs);
Gavin Howard01055ba2018-11-03 11:00:21 -06004650
4651 break;
4652 }
4653
4654 case BC_LEX_NAME:
4655 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004656 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004657 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004658 paren_expr = true;
4659 rprn = get_token = bin_last = false;
Denys Vlasenko26819db2018-12-12 16:08:46 +01004660 s = zbc_parse_name(p, &prev, flags & ~BC_PARSE_NOCALL);
Gavin Howard01055ba2018-11-03 11:00:21 -06004661 ++nexprs;
4662
4663 break;
4664 }
4665
4666 case BC_LEX_NUMBER:
4667 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004668 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004669 return bc_error_bad_expression();
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01004670 bc_parse_number(p);
4671 nexprs++;
4672 prev = BC_INST_NUM;
Gavin Howard01055ba2018-11-03 11:00:21 -06004673 paren_expr = get_token = true;
4674 rprn = bin_last = false;
4675
4676 break;
4677 }
4678
4679 case BC_LEX_KEY_IBASE:
4680 case BC_LEX_KEY_LAST:
4681 case BC_LEX_KEY_OBASE:
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();
Gavin Howard01055ba2018-11-03 11:00:21 -06004685 prev = (char) (t - BC_LEX_KEY_IBASE + BC_INST_IBASE);
4686 bc_parse_push(p, (char) prev);
4687
4688 paren_expr = get_token = true;
4689 rprn = bin_last = false;
4690 ++nexprs;
4691
4692 break;
4693 }
4694
4695 case BC_LEX_KEY_LENGTH:
4696 case BC_LEX_KEY_SQRT:
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();
Denys Vlasenko26819db2018-12-12 16:08:46 +01004700 s = zbc_parse_builtin(p, t, flags, &prev);
Gavin Howard01055ba2018-11-03 11:00:21 -06004701 paren_expr = true;
4702 rprn = get_token = bin_last = false;
4703 ++nexprs;
4704
4705 break;
4706 }
4707
4708 case BC_LEX_KEY_READ:
4709 {
4710 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004711 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004712 else if (flags & BC_PARSE_NOREAD)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004713 s = bc_error_nested_read_call();
Gavin Howard01055ba2018-11-03 11:00:21 -06004714 else
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004715 s = zbc_parse_read(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004716
4717 paren_expr = true;
4718 rprn = get_token = bin_last = false;
4719 ++nexprs;
4720 prev = BC_INST_READ;
4721
4722 break;
4723 }
4724
4725 case BC_LEX_KEY_SCALE:
4726 {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004727 if (BC_PARSE_LEAF(prev, rprn))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004728 return bc_error_bad_expression();
Denys Vlasenko26819db2018-12-12 16:08:46 +01004729 s = zbc_parse_scale(p, &prev, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06004730 paren_expr = true;
4731 rprn = get_token = bin_last = false;
4732 ++nexprs;
4733 prev = BC_INST_SCALE;
4734
4735 break;
4736 }
4737
4738 default:
4739 {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004740 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06004741 break;
4742 }
4743 }
4744
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004745 if (!s && get_token) s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004746 }
4747
4748 if (s) return s;
Denys Vlasenkod38af482018-12-04 19:11:02 +01004749 if (G_interrupt) return BC_STATUS_FAILURE; // ^C: stop parsing
Gavin Howard01055ba2018-11-03 11:00:21 -06004750
4751 while (p->ops.len > ops_bgn) {
4752
4753 top = BC_PARSE_TOP_OP(p);
4754 assign = top >= BC_LEX_OP_ASSIGN_POWER && top <= BC_LEX_OP_ASSIGN;
4755
4756 if (top == BC_LEX_LPAREN || top == BC_LEX_RPAREN)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004757 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004758
Denys Vlasenko0154d782018-12-14 23:32:51 +01004759 bc_parse_push(p, BC_TOKEN_2_INST(top));
Gavin Howard01055ba2018-11-03 11:00:21 -06004760
4761 nexprs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_NEG;
4762 bc_vec_pop(&p->ops);
4763 }
4764
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004765 if (prev == BC_INST_BOOL_NOT || nexprs != 1)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004766 return bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06004767
Gavin Howard01055ba2018-11-03 11:00:21 -06004768 if (!(flags & BC_PARSE_REL) && nrelops) {
Denys Vlasenko00646792018-12-05 18:12:27 +01004769 s = bc_POSIX_does_not_allow("comparison operators outside if or loops");
Denys Vlasenkoec603182018-12-17 10:34:02 +01004770 IF_ERROR_RETURN_POSSIBLE(if (s) return s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004771 }
4772 else if ((flags & BC_PARSE_REL) && nrelops > 1) {
Denys Vlasenkoa6f84e12018-12-06 11:10:11 +01004773 s = bc_POSIX_requires("exactly one comparison operator per condition");
Denys Vlasenkoec603182018-12-17 10:34:02 +01004774 IF_ERROR_RETURN_POSSIBLE(if (s) return s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004775 }
4776
4777 if (flags & BC_PARSE_PRINT) {
4778 if (paren_first || !assign) bc_parse_push(p, BC_INST_PRINT);
4779 bc_parse_push(p, BC_INST_POP);
4780 }
4781
Denys Vlasenko17df8822018-12-14 23:00:24 +01004782 dbg_lex_done("%s:%d done", __func__, __LINE__);
Gavin Howard01055ba2018-11-03 11:00:21 -06004783 return s;
4784}
4785
Gavin Howard01055ba2018-11-03 11:00:21 -06004786#endif // ENABLE_BC
4787
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01004788#if ENABLE_DC
Denys Vlasenkocca79a02018-12-05 21:15:46 +01004789
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004790static BC_STATUS zdc_parse_register(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004791{
4792 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06004793
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004794 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004795 if (s) RETURN_STATUS(s);
4796 if (p->l.t.t != BC_LEX_NAME) RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004797
Denys Vlasenkoe6c40c42018-12-16 20:32:58 +01004798 bc_parse_pushName(p, p->l.t.v.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06004799
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004800 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004801}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004802#define zdc_parse_register(...) (zdc_parse_register(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004803
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004804static BC_STATUS zdc_parse_string(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004805{
Denys Vlasenkoe42cc192018-12-17 11:02:26 +01004806 char *str, *name;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01004807 size_t idx, len = G.prog.strs.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06004808
Denys Vlasenkoe42cc192018-12-17 11:02:26 +01004809//why pad to 32 zeros??
4810 name = xasprintf("%032lu", (unsigned long)len);
Gavin Howard01055ba2018-11-03 11:00:21 -06004811
4812 str = xstrdup(p->l.t.v.v);
4813 bc_parse_push(p, BC_INST_STR);
4814 bc_parse_pushIndex(p, len);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01004815 bc_vec_push(&G.prog.strs, &str);
Gavin Howard01055ba2018-11-03 11:00:21 -06004816 bc_parse_addFunc(p, name, &idx);
4817
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004818 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004819}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004820#define zdc_parse_string(...) (zdc_parse_string(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004821
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004822static BC_STATUS zdc_parse_mem(BcParse *p, uint8_t inst, bool name, bool store)
Gavin Howard01055ba2018-11-03 11:00:21 -06004823{
4824 BcStatus s;
4825
4826 bc_parse_push(p, inst);
4827 if (name) {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004828 s = zdc_parse_register(p);
4829 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004830 }
4831
4832 if (store) {
4833 bc_parse_push(p, BC_INST_SWAP);
4834 bc_parse_push(p, BC_INST_ASSIGN);
4835 bc_parse_push(p, BC_INST_POP);
4836 }
4837
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004838 RETURN_STATUS(zbc_lex_next(&p->l));
Gavin Howard01055ba2018-11-03 11:00:21 -06004839}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004840#define zdc_parse_mem(...) (zdc_parse_mem(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004841
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004842static BC_STATUS zdc_parse_cond(BcParse *p, uint8_t inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06004843{
4844 BcStatus s;
4845
4846 bc_parse_push(p, inst);
4847 bc_parse_push(p, BC_INST_EXEC_COND);
4848
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004849 s = zdc_parse_register(p);
4850 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004851
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004852 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004853 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004854
4855 if (p->l.t.t == BC_LEX_ELSE) {
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004856 s = zdc_parse_register(p);
4857 if (s) RETURN_STATUS(s);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004858 s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004859 }
4860 else
4861 bc_parse_push(p, BC_PARSE_STREND);
4862
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004863 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004864}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004865#define zdc_parse_cond(...) (zdc_parse_cond(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004866
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004867static BC_STATUS zdc_parse_token(BcParse *p, BcLexType t, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06004868{
4869 BcStatus s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06004870 uint8_t inst;
4871 bool assign, get_token = false;
4872
4873 switch (t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004874 case BC_LEX_OP_REL_EQ:
4875 case BC_LEX_OP_REL_LE:
4876 case BC_LEX_OP_REL_GE:
4877 case BC_LEX_OP_REL_NE:
4878 case BC_LEX_OP_REL_LT:
4879 case BC_LEX_OP_REL_GT:
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004880 s = zdc_parse_cond(p, t - BC_LEX_OP_REL_EQ + BC_INST_REL_EQ);
Gavin Howard01055ba2018-11-03 11:00:21 -06004881 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004882 case BC_LEX_SCOLON:
4883 case BC_LEX_COLON:
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004884 s = zdc_parse_mem(p, BC_INST_ARRAY_ELEM, true, t == BC_LEX_COLON);
Gavin Howard01055ba2018-11-03 11:00:21 -06004885 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004886 case BC_LEX_STR:
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004887 s = zdc_parse_string(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004888 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004889 case BC_LEX_NEG:
4890 case BC_LEX_NUMBER:
Gavin Howard01055ba2018-11-03 11:00:21 -06004891 if (t == BC_LEX_NEG) {
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004892 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004893 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004894 if (p->l.t.t != BC_LEX_NUMBER)
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004895 RETURN_STATUS(bc_error_bad_token());
Gavin Howard01055ba2018-11-03 11:00:21 -06004896 }
Denys Vlasenko9dc5d082018-12-16 18:43:51 +01004897 bc_parse_number(p);
Gavin Howard01055ba2018-11-03 11:00:21 -06004898 if (t == BC_LEX_NEG) bc_parse_push(p, BC_INST_NEG);
4899 get_token = true;
Gavin Howard01055ba2018-11-03 11:00:21 -06004900 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004901 case BC_LEX_KEY_READ:
Gavin Howard01055ba2018-11-03 11:00:21 -06004902 if (flags & BC_PARSE_NOREAD)
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004903 s = bc_error_nested_read_call();
Gavin Howard01055ba2018-11-03 11:00:21 -06004904 else
4905 bc_parse_push(p, BC_INST_READ);
4906 get_token = true;
4907 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004908 case BC_LEX_OP_ASSIGN:
4909 case BC_LEX_STORE_PUSH:
Gavin Howard01055ba2018-11-03 11:00:21 -06004910 assign = t == BC_LEX_OP_ASSIGN;
4911 inst = assign ? BC_INST_VAR : BC_INST_PUSH_TO_VAR;
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004912 s = zdc_parse_mem(p, inst, true, assign);
Gavin Howard01055ba2018-11-03 11:00:21 -06004913 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004914 case BC_LEX_LOAD:
4915 case BC_LEX_LOAD_POP:
Gavin Howard01055ba2018-11-03 11:00:21 -06004916 inst = t == BC_LEX_LOAD_POP ? BC_INST_PUSH_VAR : BC_INST_LOAD;
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004917 s = zdc_parse_mem(p, inst, true, false);
Gavin Howard01055ba2018-11-03 11:00:21 -06004918 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004919 case BC_LEX_STORE_IBASE:
4920 case BC_LEX_STORE_SCALE:
4921 case BC_LEX_STORE_OBASE:
Gavin Howard01055ba2018-11-03 11:00:21 -06004922 inst = t - BC_LEX_STORE_IBASE + BC_INST_IBASE;
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004923 s = zdc_parse_mem(p, inst, false, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06004924 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004925 default:
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01004926 s = bc_error_bad_token();
Gavin Howard01055ba2018-11-03 11:00:21 -06004927 get_token = true;
4928 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06004929 }
4930
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004931 if (!s && get_token) s = zbc_lex_next(&p->l);
Gavin Howard01055ba2018-11-03 11:00:21 -06004932
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004933 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004934}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004935#define zdc_parse_token(...) (zdc_parse_token(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004936
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004937static BC_STATUS zdc_parse_expr(BcParse *p, uint8_t flags)
Gavin Howard01055ba2018-11-03 11:00:21 -06004938{
4939 BcStatus s = BC_STATUS_SUCCESS;
4940 BcInst inst;
4941 BcLexType t;
4942
Gavin Howard01055ba2018-11-03 11:00:21 -06004943 for (t = p->l.t.t; !s && t != BC_LEX_EOF; t = p->l.t.t) {
Gavin Howard01055ba2018-11-03 11:00:21 -06004944 inst = dc_parse_insts[t];
4945
4946 if (inst != BC_INST_INVALID) {
4947 bc_parse_push(p, inst);
Denys Vlasenko9a34e892018-12-12 13:58:55 +01004948 s = zbc_lex_next(&p->l);
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004949 } else
4950 s = zdc_parse_token(p, t, flags);
Gavin Howard01055ba2018-11-03 11:00:21 -06004951 }
4952
4953 if (!s && p->l.t.t == BC_LEX_EOF && (flags & BC_PARSE_NOCALL))
4954 bc_parse_push(p, BC_INST_POP_EXEC);
4955
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004956 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004957}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004958#define zdc_parse_expr(...) (zdc_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004959
Denys Vlasenkoc0ef23c2018-12-12 23:03:10 +01004960static BC_STATUS zdc_parse_parse(BcParse *p)
Gavin Howard01055ba2018-11-03 11:00:21 -06004961{
4962 BcStatus s;
4963
4964 if (p->l.t.t == BC_LEX_EOF)
Denys Vlasenko60cf7472018-12-04 20:05:28 +01004965 s = bc_error("end of file");
Gavin Howard01055ba2018-11-03 11:00:21 -06004966 else
Denys Vlasenko8cd468f2018-12-12 14:54:38 +01004967 s = zdc_parse_expr(p, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06004968
Denys Vlasenkod38af482018-12-04 19:11:02 +01004969 if (s || G_interrupt) {
4970 bc_parse_reset(p);
4971 s = BC_STATUS_FAILURE;
4972 }
Gavin Howard01055ba2018-11-03 11:00:21 -06004973
Denys Vlasenko26819db2018-12-12 16:08:46 +01004974 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06004975}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004976#define zdc_parse_parse(...) (zdc_parse_parse(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06004977
Gavin Howard01055ba2018-11-03 11:00:21 -06004978#endif // ENABLE_DC
4979
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01004980static BC_STATUS zcommon_parse_expr(BcParse *p, uint8_t flags)
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01004981{
4982 if (IS_BC) {
Denys Vlasenko4b72aeb2018-12-17 16:54:37 +01004983 IF_BC(RETURN_STATUS(zbc_parse_expr(p, flags)));
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01004984 } else {
Denys Vlasenko99b37622018-12-15 20:06:59 +01004985 IF_DC(RETURN_STATUS(zdc_parse_expr(p, flags)));
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01004986 }
4987}
Denys Vlasenkoec603182018-12-17 10:34:02 +01004988#define zcommon_parse_expr(...) (zcommon_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkof6c1da52018-12-02 17:36:00 +01004989
Denys Vlasenkodf515392018-12-02 19:27:48 +01004990static BcVec* bc_program_search(char *id, bool var)
Gavin Howard01055ba2018-11-03 11:00:21 -06004991{
Gavin Howard01055ba2018-11-03 11:00:21 -06004992 BcId e, *ptr;
4993 BcVec *v, *map;
4994 size_t i;
4995 BcResultData data;
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01004996 int new;
Gavin Howard01055ba2018-11-03 11:00:21 -06004997
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01004998 v = var ? &G.prog.vars : &G.prog.arrs;
4999 map = var ? &G.prog.var_map : &G.prog.arr_map;
Gavin Howard01055ba2018-11-03 11:00:21 -06005000
5001 e.name = id;
5002 e.idx = v->len;
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01005003 new = bc_map_insert(map, &e, &i); // 1 if insertion was successful
Gavin Howard01055ba2018-11-03 11:00:21 -06005004
5005 if (new) {
5006 bc_array_init(&data.v, var);
5007 bc_vec_push(v, &data.v);
5008 }
5009
5010 ptr = bc_vec_item(map, i);
5011 if (new) ptr->name = xstrdup(e.name);
Denys Vlasenkodf515392018-12-02 19:27:48 +01005012 return bc_vec_item(v, ptr->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005013}
5014
Denys Vlasenko29301232018-12-11 15:29:32 +01005015static BC_STATUS zbc_program_num(BcResult *r, BcNum **num, bool hex)
Gavin Howard01055ba2018-11-03 11:00:21 -06005016{
Gavin Howard01055ba2018-11-03 11:00:21 -06005017 switch (r->t) {
5018
5019 case BC_RESULT_STR:
5020 case BC_RESULT_TEMP:
5021 case BC_RESULT_IBASE:
5022 case BC_RESULT_SCALE:
5023 case BC_RESULT_OBASE:
5024 {
5025 *num = &r->d.n;
5026 break;
5027 }
5028
5029 case BC_RESULT_CONSTANT:
5030 {
Denys Vlasenkofa35e592018-12-10 20:17:24 +01005031 BcStatus s;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005032 char **str = bc_vec_item(&G.prog.consts, r->d.id.idx);
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005033 unsigned base_t;
5034 size_t len = strlen(*str);
Gavin Howard01055ba2018-11-03 11:00:21 -06005035
5036 bc_num_init(&r->d.n, len);
5037
5038 hex = hex && len == 1;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005039 base_t = hex ? 16 : G.prog.ib_t;
5040 s = zbc_num_parse(&r->d.n, *str, base_t);
Gavin Howard01055ba2018-11-03 11:00:21 -06005041
5042 if (s) {
5043 bc_num_free(&r->d.n);
Denys Vlasenko29301232018-12-11 15:29:32 +01005044 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005045 }
5046
5047 *num = &r->d.n;
5048 r->t = BC_RESULT_TEMP;
5049
5050 break;
5051 }
5052
5053 case BC_RESULT_VAR:
5054 case BC_RESULT_ARRAY:
5055 case BC_RESULT_ARRAY_ELEM:
5056 {
5057 BcVec *v;
5058
Denys Vlasenkodf515392018-12-02 19:27:48 +01005059 v = bc_program_search(r->d.id.name, r->t == BC_RESULT_VAR);
Gavin Howard01055ba2018-11-03 11:00:21 -06005060
5061 if (r->t == BC_RESULT_ARRAY_ELEM) {
5062 v = bc_vec_top(v);
5063 if (v->len <= r->d.id.idx) bc_array_expand(v, r->d.id.idx + 1);
5064 *num = bc_vec_item(v, r->d.id.idx);
5065 }
5066 else
5067 *num = bc_vec_top(v);
5068
5069 break;
5070 }
5071
5072 case BC_RESULT_LAST:
5073 {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005074 *num = &G.prog.last;
Gavin Howard01055ba2018-11-03 11:00:21 -06005075 break;
5076 }
5077
5078 case BC_RESULT_ONE:
5079 {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005080 *num = &G.prog.one;
Gavin Howard01055ba2018-11-03 11:00:21 -06005081 break;
5082 }
5083 }
5084
Denys Vlasenko29301232018-12-11 15:29:32 +01005085 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005086}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005087#define zbc_program_num(...) (zbc_program_num(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005088
Denys Vlasenko29301232018-12-11 15:29:32 +01005089static BC_STATUS zbc_program_binOpPrep(BcResult **l, BcNum **ln,
Gavin Howard01055ba2018-11-03 11:00:21 -06005090 BcResult **r, BcNum **rn, bool assign)
5091{
5092 BcStatus s;
5093 bool hex;
5094 BcResultType lt, rt;
5095
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005096 if (!BC_PROG_STACK(&G.prog.results, 2))
Denys Vlasenko29301232018-12-11 15:29:32 +01005097 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005098
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005099 *r = bc_vec_item_rev(&G.prog.results, 0);
5100 *l = bc_vec_item_rev(&G.prog.results, 1);
Gavin Howard01055ba2018-11-03 11:00:21 -06005101
5102 lt = (*l)->t;
5103 rt = (*r)->t;
5104 hex = assign && (lt == BC_RESULT_IBASE || lt == BC_RESULT_OBASE);
5105
Denys Vlasenko29301232018-12-11 15:29:32 +01005106 s = zbc_program_num(*l, ln, false);
5107 if (s) RETURN_STATUS(s);
5108 s = zbc_program_num(*r, rn, hex);
5109 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005110
5111 // We run this again under these conditions in case any vector has been
5112 // reallocated out from under the BcNums or arrays we had.
5113 if (lt == rt && (lt == BC_RESULT_VAR || lt == BC_RESULT_ARRAY_ELEM)) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005114 s = zbc_program_num(*l, ln, false);
5115 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005116 }
5117
5118 if (!BC_PROG_NUM((*l), (*ln)) && (!assign || (*l)->t != BC_RESULT_VAR))
Denys Vlasenko29301232018-12-11 15:29:32 +01005119 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005120 if (!assign && !BC_PROG_NUM((*r), (*ln)))
Denys Vlasenko29301232018-12-11 15:29:32 +01005121 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06005122
Denys Vlasenko29301232018-12-11 15:29:32 +01005123 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005124}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005125#define zbc_program_binOpPrep(...) (zbc_program_binOpPrep(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005126
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005127static void bc_program_binOpRetire(BcResult *r)
Gavin Howard01055ba2018-11-03 11:00:21 -06005128{
5129 r->t = BC_RESULT_TEMP;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005130 bc_vec_pop(&G.prog.results);
5131 bc_vec_pop(&G.prog.results);
5132 bc_vec_push(&G.prog.results, r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005133}
5134
Denys Vlasenko29301232018-12-11 15:29:32 +01005135static BC_STATUS zbc_program_prep(BcResult **r, BcNum **n)
Gavin Howard01055ba2018-11-03 11:00:21 -06005136{
5137 BcStatus s;
5138
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005139 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01005140 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005141 *r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005142
Denys Vlasenko29301232018-12-11 15:29:32 +01005143 s = zbc_program_num(*r, n, false);
5144 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005145
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005146 if (!BC_PROG_NUM((*r), (*n)))
Denys Vlasenko29301232018-12-11 15:29:32 +01005147 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06005148
Denys Vlasenko29301232018-12-11 15:29:32 +01005149 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005150}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005151#define zbc_program_prep(...) (zbc_program_prep(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005152
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005153static void bc_program_retire(BcResult *r, BcResultType t)
Gavin Howard01055ba2018-11-03 11:00:21 -06005154{
5155 r->t = t;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005156 bc_vec_pop(&G.prog.results);
5157 bc_vec_push(&G.prog.results, r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005158}
5159
Denys Vlasenko259137d2018-12-11 19:42:05 +01005160static BC_STATUS zbc_program_op(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005161{
5162 BcStatus s;
5163 BcResult *opd1, *opd2, res;
5164 BcNum *n1, *n2 = NULL;
5165
Denys Vlasenko29301232018-12-11 15:29:32 +01005166 s = zbc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
Denys Vlasenko259137d2018-12-11 19:42:05 +01005167 if (s) RETURN_STATUS(s);
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005168 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005169
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005170 s = BC_STATUS_SUCCESS;
Denys Vlasenkoec603182018-12-17 10:34:02 +01005171 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 -06005172 if (s) goto err;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005173 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005174
Denys Vlasenko259137d2018-12-11 19:42:05 +01005175 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005176
5177err:
5178 bc_num_free(&res.d.n);
Denys Vlasenko259137d2018-12-11 19:42:05 +01005179 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005180}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005181#define zbc_program_op(...) (zbc_program_op(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005182
Denys Vlasenko26819db2018-12-12 16:08:46 +01005183static BC_STATUS zbc_program_read(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06005184{
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005185 const char *sv_file;
Gavin Howard01055ba2018-11-03 11:00:21 -06005186 BcStatus s;
5187 BcParse parse;
5188 BcVec buf;
5189 BcInstPtr ip;
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005190 BcFunc *f;
Gavin Howard01055ba2018-11-03 11:00:21 -06005191
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005192 if (G.in_read)
Denys Vlasenko26819db2018-12-12 16:08:46 +01005193 RETURN_STATUS(bc_error_nested_read_call());
Gavin Howard01055ba2018-11-03 11:00:21 -06005194
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005195 f = bc_program_func(BC_PROG_READ);
Denys Vlasenko7d628012018-12-04 21:46:47 +01005196 bc_vec_pop_all(&f->code);
Gavin Howard01055ba2018-11-03 11:00:21 -06005197
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005198 sv_file = G.prog.file;
5199 G.prog.file = NULL;
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005200 G.in_read = 1;
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005201
Denys Vlasenko82ea67f2018-12-13 19:23:45 +01005202 bc_char_vec_init(&buf);
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01005203 bc_read_line(&buf, stdin);
Gavin Howard01055ba2018-11-03 11:00:21 -06005204
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01005205 bc_parse_create(&parse, BC_PROG_READ);
Denys Vlasenko0409ad32018-12-05 16:39:22 +01005206 bc_lex_file(&parse.l);
Gavin Howard01055ba2018-11-03 11:00:21 -06005207
Denys Vlasenkof86e9602018-12-14 17:01:56 +01005208 s = zbc_parse_text_init(&parse, buf.v);
Gavin Howard01055ba2018-11-03 11:00:21 -06005209 if (s) goto exec_err;
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01005210 s = zcommon_parse_expr(&parse, BC_PARSE_NOREAD);
Gavin Howard01055ba2018-11-03 11:00:21 -06005211 if (s) goto exec_err;
5212
5213 if (parse.l.t.t != BC_LEX_NLINE && parse.l.t.t != BC_LEX_EOF) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005214 s = bc_error("bad read() expression");
Gavin Howard01055ba2018-11-03 11:00:21 -06005215 goto exec_err;
5216 }
5217
5218 ip.func = BC_PROG_READ;
5219 ip.idx = 0;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005220 ip.len = G.prog.results.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06005221
5222 // Update this pointer, just in case.
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005223 f = bc_program_func(BC_PROG_READ);
Gavin Howard01055ba2018-11-03 11:00:21 -06005224
5225 bc_vec_pushByte(&f->code, BC_INST_POP_EXEC);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005226 bc_vec_push(&G.prog.stack, &ip);
Gavin Howard01055ba2018-11-03 11:00:21 -06005227
5228exec_err:
5229 bc_parse_free(&parse);
Denys Vlasenko69171dc2018-12-12 00:29:24 +01005230 G.in_read = 0;
Denys Vlasenko4dd36522018-12-11 22:26:38 +01005231 G.prog.file = sv_file;
Gavin Howard01055ba2018-11-03 11:00:21 -06005232 bc_vec_free(&buf);
Denys Vlasenko26819db2018-12-12 16:08:46 +01005233 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005234}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005235#define zbc_program_read(...) (zbc_program_read(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005236
5237static size_t bc_program_index(char *code, size_t *bgn)
5238{
5239 char amt = code[(*bgn)++], i = 0;
5240 size_t res = 0;
5241
5242 for (; i < amt; ++i, ++(*bgn))
5243 res |= (((size_t)((int) code[*bgn]) & UCHAR_MAX) << (i * CHAR_BIT));
5244
5245 return res;
5246}
5247
5248static char *bc_program_name(char *code, size_t *bgn)
5249{
5250 size_t i;
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01005251 char *s, *str = code + *bgn, *ptr = strchr(str, BC_PARSE_STREND);
Gavin Howard01055ba2018-11-03 11:00:21 -06005252
5253 s = xmalloc(ptr - str + 1);
Denys Vlasenko6b0fbd12018-12-18 12:55:40 +01005254 i = 0;
5255 for (;;) {
5256 char c = code[(*bgn)++];
5257 if (c == '\0' || c == BC_PARSE_STREND)
5258 break;
5259 s[i++] = c;
5260 }
Gavin Howard01055ba2018-11-03 11:00:21 -06005261 s[i] = '\0';
5262
5263 return s;
5264}
5265
Denys Vlasenko5f1b90b2018-12-08 23:18:06 +01005266static void bc_program_printString(const char *str)
Gavin Howard01055ba2018-11-03 11:00:21 -06005267{
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005268#if ENABLE_DC
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005269 if (!str[0]) {
Denys Vlasenko2c6f5632018-12-11 21:21:14 +01005270 // Example: echo '[]ap' | dc
5271 // should print two bytes: 0x00, 0x0A
Denys Vlasenko00d77792018-11-30 23:13:42 +01005272 bb_putchar('\0');
Gavin Howard01055ba2018-11-03 11:00:21 -06005273 return;
5274 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005275#endif
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005276 while (*str) {
5277 int c = *str++;
5278 if (c != '\\' || !*str)
Denys Vlasenko00d77792018-11-30 23:13:42 +01005279 bb_putchar(c);
Gavin Howard01055ba2018-11-03 11:00:21 -06005280 else {
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005281 c = *str++;
Gavin Howard01055ba2018-11-03 11:00:21 -06005282 switch (c) {
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005283 case 'a':
5284 bb_putchar('\a');
5285 break;
5286 case 'b':
5287 bb_putchar('\b');
5288 break;
5289 case '\\':
5290 case 'e':
5291 bb_putchar('\\');
5292 break;
5293 case 'f':
5294 bb_putchar('\f');
5295 break;
5296 case 'n':
5297 bb_putchar('\n');
5298 G.prog.nchars = SIZE_MAX;
5299 break;
5300 case 'r':
5301 bb_putchar('\r');
5302 break;
5303 case 'q':
5304 bb_putchar('"');
5305 break;
5306 case 't':
5307 bb_putchar('\t');
5308 break;
5309 default:
5310 // Just print the backslash and following character.
5311 bb_putchar('\\');
5312 ++G.prog.nchars;
5313 bb_putchar(c);
5314 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06005315 }
5316 }
Denys Vlasenko9f657e02018-12-11 19:52:25 +01005317 ++G.prog.nchars;
Gavin Howard01055ba2018-11-03 11:00:21 -06005318 }
5319}
5320
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005321static void bc_num_printNewline(void)
5322{
5323 if (G.prog.nchars == G.prog.len - 1) {
5324 bb_putchar('\\');
5325 bb_putchar('\n');
5326 G.prog.nchars = 0;
5327 }
5328}
5329
5330#if ENABLE_DC
5331static FAST_FUNC void bc_num_printChar(size_t num, size_t width, bool radix)
5332{
5333 (void) radix;
5334 bb_putchar((char) num);
5335 G.prog.nchars += width;
5336}
5337#endif
5338
5339static FAST_FUNC void bc_num_printDigits(size_t num, size_t width, bool radix)
5340{
5341 size_t exp, pow;
5342
5343 bc_num_printNewline();
5344 bb_putchar(radix ? '.' : ' ');
5345 ++G.prog.nchars;
5346
5347 bc_num_printNewline();
5348 for (exp = 0, pow = 1; exp < width - 1; ++exp, pow *= 10)
5349 continue;
5350
5351 for (exp = 0; exp < width; pow /= 10, ++G.prog.nchars, ++exp) {
5352 size_t dig;
5353 bc_num_printNewline();
5354 dig = num / pow;
5355 num -= dig * pow;
5356 bb_putchar(((char) dig) + '0');
5357 }
5358}
5359
5360static FAST_FUNC void bc_num_printHex(size_t num, size_t width, bool radix)
5361{
5362 if (radix) {
5363 bc_num_printNewline();
5364 bb_putchar('.');
5365 G.prog.nchars += 1;
5366 }
5367
5368 bc_num_printNewline();
5369 bb_putchar(bb_hexdigits_upcase[num]);
5370 G.prog.nchars += width;
5371}
5372
5373static void bc_num_printDecimal(BcNum *n)
5374{
5375 size_t i, rdx = n->rdx - 1;
5376
5377 if (n->neg) bb_putchar('-');
5378 G.prog.nchars += n->neg;
5379
5380 for (i = n->len - 1; i < n->len; --i)
5381 bc_num_printHex((size_t) n->num[i], 1, i == rdx);
5382}
5383
5384static BC_STATUS zbc_num_printNum(BcNum *n, BcNum *base, size_t width, BcNumDigitOp print)
5385{
5386 BcStatus s;
5387 BcVec stack;
5388 BcNum intp, fracp, digit, frac_len;
5389 unsigned long dig, *ptr;
5390 size_t i;
5391 bool radix;
5392
5393 if (n->len == 0) {
5394 print(0, width, false);
5395 RETURN_STATUS(BC_STATUS_SUCCESS);
5396 }
5397
5398 bc_vec_init(&stack, sizeof(long), NULL);
5399 bc_num_init(&intp, n->len);
5400 bc_num_init(&fracp, n->rdx);
5401 bc_num_init(&digit, width);
5402 bc_num_init(&frac_len, BC_NUM_INT(n));
5403 bc_num_copy(&intp, n);
5404 bc_num_one(&frac_len);
5405
5406 bc_num_truncate(&intp, intp.rdx);
5407 s = zbc_num_sub(n, &intp, &fracp, 0);
5408 if (s) goto err;
5409
5410 while (intp.len != 0) {
5411 s = zbc_num_divmod(&intp, base, &intp, &digit, 0);
5412 if (s) goto err;
5413 s = zbc_num_ulong(&digit, &dig);
5414 if (s) goto err;
5415 bc_vec_push(&stack, &dig);
5416 }
5417
5418 for (i = 0; i < stack.len; ++i) {
5419 ptr = bc_vec_item_rev(&stack, i);
5420 print(*ptr, width, false);
5421 }
5422
5423 if (!n->rdx) goto err;
5424
5425 for (radix = true; frac_len.len <= n->rdx; radix = false) {
5426 s = zbc_num_mul(&fracp, base, &fracp, n->rdx);
5427 if (s) goto err;
5428 s = zbc_num_ulong(&fracp, &dig);
5429 if (s) goto err;
5430 bc_num_ulong2num(&intp, dig);
5431 s = zbc_num_sub(&fracp, &intp, &fracp, 0);
5432 if (s) goto err;
5433 print(dig, width, radix);
5434 s = zbc_num_mul(&frac_len, base, &frac_len, 0);
5435 if (s) goto err;
5436 }
5437
5438err:
5439 bc_num_free(&frac_len);
5440 bc_num_free(&digit);
5441 bc_num_free(&fracp);
5442 bc_num_free(&intp);
5443 bc_vec_free(&stack);
5444 RETURN_STATUS(s);
5445}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005446#define zbc_num_printNum(...) (zbc_num_printNum(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005447
5448static BC_STATUS zbc_num_printBase(BcNum *n)
5449{
5450 BcStatus s;
5451 size_t width, i;
5452 BcNumDigitOp print;
5453 bool neg = n->neg;
5454
5455 if (neg) {
5456 bb_putchar('-');
5457 G.prog.nchars++;
5458 }
5459
5460 n->neg = false;
5461
5462 if (G.prog.ob_t <= BC_NUM_MAX_IBASE) {
5463 width = 1;
5464 print = bc_num_printHex;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005465 } else {
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005466 for (i = G.prog.ob_t - 1, width = 0; i != 0; i /= 10, ++width)
5467 continue;
5468 print = bc_num_printDigits;
5469 }
5470
5471 s = zbc_num_printNum(n, &G.prog.ob, width, print);
5472 n->neg = neg;
5473
5474 RETURN_STATUS(s);
5475}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005476#define zbc_num_printBase(...) (zbc_num_printBase(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005477
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005478static BC_STATUS zbc_num_print(BcNum *n, bool newline)
5479{
5480 BcStatus s = BC_STATUS_SUCCESS;
5481
5482 bc_num_printNewline();
5483
5484 if (n->len == 0) {
5485 bb_putchar('0');
5486 ++G.prog.nchars;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005487 } else if (G.prog.ob_t == 10)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005488 bc_num_printDecimal(n);
5489 else
5490 s = zbc_num_printBase(n);
5491
5492 if (newline) {
5493 bb_putchar('\n');
5494 G.prog.nchars = 0;
5495 }
5496
5497 RETURN_STATUS(s);
5498}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005499#define zbc_num_print(...) (zbc_num_print(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005500
Denys Vlasenko29301232018-12-11 15:29:32 +01005501static BC_STATUS zbc_program_print(char inst, size_t idx)
Gavin Howard01055ba2018-11-03 11:00:21 -06005502{
Denys Vlasenkofa35e592018-12-10 20:17:24 +01005503 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06005504 BcResult *r;
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005505 BcNum *num;
Gavin Howard01055ba2018-11-03 11:00:21 -06005506 bool pop = inst != BC_INST_PRINT;
5507
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005508 if (!BC_PROG_STACK(&G.prog.results, idx + 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01005509 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005510
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005511 r = bc_vec_item_rev(&G.prog.results, idx);
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005512 num = NULL; // is this NULL necessary?
Denys Vlasenko29301232018-12-11 15:29:32 +01005513 s = zbc_program_num(r, &num, false);
5514 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005515
5516 if (BC_PROG_NUM(r, num)) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005517 s = zbc_num_print(num, !pop);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005518 if (!s) bc_num_copy(&G.prog.last, num);
Gavin Howard01055ba2018-11-03 11:00:21 -06005519 }
5520 else {
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005521 char *str;
Gavin Howard01055ba2018-11-03 11:00:21 -06005522
5523 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005524 str = *bc_program_str(idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005525
5526 if (inst == BC_INST_PRINT_STR) {
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005527 for (;;) {
5528 char c = *str++;
5529 if (c == '\0') break;
Denys Vlasenko00d77792018-11-30 23:13:42 +01005530 bb_putchar(c);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005531 ++G.prog.nchars;
Denys Vlasenko44d79d82018-12-10 12:33:40 +01005532 if (c == '\n') G.prog.nchars = 0;
Gavin Howard01055ba2018-11-03 11:00:21 -06005533 }
5534 }
5535 else {
Denys Vlasenko5f1b90b2018-12-08 23:18:06 +01005536 bc_program_printString(str);
Denys Vlasenko00d77792018-11-30 23:13:42 +01005537 if (inst == BC_INST_PRINT) bb_putchar('\n');
Gavin Howard01055ba2018-11-03 11:00:21 -06005538 }
5539 }
5540
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005541 if (!s && pop) bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005542
Denys Vlasenko29301232018-12-11 15:29:32 +01005543 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005544}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005545#define zbc_program_print(...) (zbc_program_print(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005546
Denys Vlasenko29301232018-12-11 15:29:32 +01005547static BC_STATUS zbc_program_negate(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06005548{
5549 BcStatus s;
5550 BcResult res, *ptr;
5551 BcNum *num = NULL;
5552
Denys Vlasenko29301232018-12-11 15:29:32 +01005553 s = zbc_program_prep(&ptr, &num);
5554 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005555
5556 bc_num_init(&res.d.n, num->len);
5557 bc_num_copy(&res.d.n, num);
5558 if (res.d.n.len) res.d.n.neg = !res.d.n.neg;
5559
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005560 bc_program_retire(&res, BC_RESULT_TEMP);
Gavin Howard01055ba2018-11-03 11:00:21 -06005561
Denys Vlasenko29301232018-12-11 15:29:32 +01005562 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005563}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005564#define zbc_program_negate(...) (zbc_program_negate(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005565
Denys Vlasenko728e7c92018-12-11 19:37:00 +01005566static BC_STATUS zbc_program_logical(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005567{
5568 BcStatus s;
5569 BcResult *opd1, *opd2, res;
5570 BcNum *n1, *n2;
Denys Vlasenko16494f52018-12-12 00:50:23 +01005571 ssize_t cond;
Gavin Howard01055ba2018-11-03 11:00:21 -06005572
Denys Vlasenko29301232018-12-11 15:29:32 +01005573 s = zbc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
Denys Vlasenko728e7c92018-12-11 19:37:00 +01005574 if (s) RETURN_STATUS(s);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005575
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005576 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005577
5578 if (inst == BC_INST_BOOL_AND)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005579 cond = bc_num_cmp(n1, &G.prog.zero) && bc_num_cmp(n2, &G.prog.zero);
Gavin Howard01055ba2018-11-03 11:00:21 -06005580 else if (inst == BC_INST_BOOL_OR)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005581 cond = bc_num_cmp(n1, &G.prog.zero) || bc_num_cmp(n2, &G.prog.zero);
Gavin Howard01055ba2018-11-03 11:00:21 -06005582 else {
Denys Vlasenko16494f52018-12-12 00:50:23 +01005583 cond = bc_num_cmp(n1, n2);
Gavin Howard01055ba2018-11-03 11:00:21 -06005584 switch (inst) {
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005585 case BC_INST_REL_EQ:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005586 cond = (cond == 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005587 break;
5588 case BC_INST_REL_LE:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005589 cond = (cond <= 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005590 break;
5591 case BC_INST_REL_GE:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005592 cond = (cond >= 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005593 break;
5594 case BC_INST_REL_LT:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005595 cond = (cond < 0);
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005596 break;
5597 case BC_INST_REL_GT:
Denys Vlasenko16494f52018-12-12 00:50:23 +01005598 cond = (cond > 0);
5599 break;
5600 default: // = case BC_INST_REL_NE:
5601 //cond = (cond != 0); - not needed
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005602 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06005603 }
5604 }
5605
Denys Vlasenko09d8df82018-12-11 19:29:35 +01005606 if (cond) bc_num_one(&res.d.n);
5607 //else bc_num_zero(&res.d.n); - already is
Gavin Howard01055ba2018-11-03 11:00:21 -06005608
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005609 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005610
Denys Vlasenko728e7c92018-12-11 19:37:00 +01005611 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005612}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005613#define zbc_program_logical(...) (zbc_program_logical(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005614
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005615#if ENABLE_DC
Denys Vlasenko29301232018-12-11 15:29:32 +01005616static BC_STATUS zbc_program_assignStr(BcResult *r, BcVec *v,
Gavin Howard01055ba2018-11-03 11:00:21 -06005617 bool push)
5618{
5619 BcNum n2;
5620 BcResult res;
5621
5622 memset(&n2, 0, sizeof(BcNum));
5623 n2.rdx = res.d.id.idx = r->d.id.idx;
5624 res.t = BC_RESULT_STR;
5625
5626 if (!push) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005627 if (!BC_PROG_STACK(&G.prog.results, 2))
Denys Vlasenko29301232018-12-11 15:29:32 +01005628 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005629 bc_vec_pop(v);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005630 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005631 }
5632
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005633 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005634
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005635 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005636 bc_vec_push(v, &n2);
5637
Denys Vlasenko29301232018-12-11 15:29:32 +01005638 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005639}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005640#define zbc_program_assignStr(...) (zbc_program_assignStr(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005641#endif // ENABLE_DC
5642
Denys Vlasenko29301232018-12-11 15:29:32 +01005643static BC_STATUS zbc_program_copyToVar(char *name, bool var)
Gavin Howard01055ba2018-11-03 11:00:21 -06005644{
5645 BcStatus s;
5646 BcResult *ptr, r;
5647 BcVec *v;
5648 BcNum *n;
5649
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005650 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01005651 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005652
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005653 ptr = bc_vec_top(&G.prog.results);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005654 if ((ptr->t == BC_RESULT_ARRAY) != !var)
Denys Vlasenko29301232018-12-11 15:29:32 +01005655 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenkodf515392018-12-02 19:27:48 +01005656 v = bc_program_search(name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06005657
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005658#if ENABLE_DC
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005659 if (ptr->t == BC_RESULT_STR && !var)
Denys Vlasenko29301232018-12-11 15:29:32 +01005660 RETURN_STATUS(bc_error_variable_is_wrong_type());
5661 if (ptr->t == BC_RESULT_STR)
5662 RETURN_STATUS(zbc_program_assignStr(ptr, v, true));
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005663#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06005664
Denys Vlasenko29301232018-12-11 15:29:32 +01005665 s = zbc_program_num(ptr, &n, false);
5666 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005667
5668 // Do this once more to make sure that pointers were not invalidated.
Denys Vlasenkodf515392018-12-02 19:27:48 +01005669 v = bc_program_search(name, var);
Gavin Howard01055ba2018-11-03 11:00:21 -06005670
5671 if (var) {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005672 bc_num_init_DEF_SIZE(&r.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005673 bc_num_copy(&r.d.n, n);
5674 }
5675 else {
5676 bc_array_init(&r.d.v, true);
5677 bc_array_copy(&r.d.v, (BcVec *) n);
5678 }
5679
5680 bc_vec_push(v, &r.d);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005681 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005682
Denys Vlasenko29301232018-12-11 15:29:32 +01005683 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005684}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005685#define zbc_program_copyToVar(...) (zbc_program_copyToVar(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005686
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005687static BC_STATUS zbc_program_assign(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005688{
5689 BcStatus s;
5690 BcResult *left, *right, res;
5691 BcNum *l = NULL, *r = NULL;
Gavin Howard01055ba2018-11-03 11:00:21 -06005692 bool assign = inst == BC_INST_ASSIGN, ib, sc;
5693
Denys Vlasenko29301232018-12-11 15:29:32 +01005694 s = zbc_program_binOpPrep(&left, &l, &right, &r, assign);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005695 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005696
5697 ib = left->t == BC_RESULT_IBASE;
5698 sc = left->t == BC_RESULT_SCALE;
5699
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005700#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06005701
5702 if (right->t == BC_RESULT_STR) {
5703
5704 BcVec *v;
5705
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005706 if (left->t != BC_RESULT_VAR)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005707 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenkodf515392018-12-02 19:27:48 +01005708 v = bc_program_search(left->d.id.name, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06005709
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005710 RETURN_STATUS(zbc_program_assignStr(right, v, false));
Gavin Howard01055ba2018-11-03 11:00:21 -06005711 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005712#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06005713
5714 if (left->t == BC_RESULT_CONSTANT || left->t == BC_RESULT_TEMP)
Denys Vlasenko259137d2018-12-11 19:42:05 +01005715 RETURN_STATUS(bc_error("bad assignment:"
Denys Vlasenko0154d782018-12-14 23:32:51 +01005716 " left side must be variable"
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005717 " or array element"
Denys Vlasenko0154d782018-12-14 23:32:51 +01005718 )); // note: shared string
Gavin Howard01055ba2018-11-03 11:00:21 -06005719
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005720#if ENABLE_BC
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005721 if (inst == BC_INST_ASSIGN_DIVIDE && !bc_num_cmp(r, &G.prog.zero))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005722 RETURN_STATUS(bc_error("divide by zero"));
Gavin Howard01055ba2018-11-03 11:00:21 -06005723
5724 if (assign)
5725 bc_num_copy(l, r);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005726 else {
5727 s = BC_STATUS_SUCCESS;
Denys Vlasenkoec603182018-12-17 10:34:02 +01005728 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 +01005729 }
5730 if (s) RETURN_STATUS(s);
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005731#else
Gavin Howard01055ba2018-11-03 11:00:21 -06005732 bc_num_copy(l, r);
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005733#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06005734
5735 if (ib || sc || left->t == BC_RESULT_OBASE) {
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005736 static const char *const msg[] = {
Denys Vlasenko64074a12018-12-07 15:50:14 +01005737 "bad ibase; must be [2,16]", //BC_RESULT_IBASE
5738 "bad scale; must be [0,"BC_MAX_SCALE_STR"]", //BC_RESULT_SCALE
5739 NULL, //can't happen //BC_RESULT_LAST
5740 NULL, //can't happen //BC_RESULT_CONSTANT
5741 NULL, //can't happen //BC_RESULT_ONE
5742 "bad obase; must be [2,"BC_MAX_OBASE_STR"]", //BC_RESULT_OBASE
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005743 };
Gavin Howard01055ba2018-11-03 11:00:21 -06005744 size_t *ptr;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005745 size_t max;
5746 unsigned long val;
Gavin Howard01055ba2018-11-03 11:00:21 -06005747
Denys Vlasenko29301232018-12-11 15:29:32 +01005748 s = zbc_num_ulong(l, &val);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005749 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005750 s = left->t - BC_RESULT_IBASE;
Gavin Howard01055ba2018-11-03 11:00:21 -06005751 if (sc) {
5752 max = BC_MAX_SCALE;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005753 ptr = &G.prog.scale;
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005754 } else {
5755 if (val < 2)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005756 RETURN_STATUS(bc_error(msg[s]));
Gavin Howard01055ba2018-11-03 11:00:21 -06005757 max = ib ? BC_NUM_MAX_IBASE : BC_MAX_OBASE;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005758 ptr = ib ? &G.prog.ib_t : &G.prog.ob_t;
Gavin Howard01055ba2018-11-03 11:00:21 -06005759 }
5760
Denys Vlasenko60cf7472018-12-04 20:05:28 +01005761 if (val > max)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005762 RETURN_STATUS(bc_error(msg[s]));
Denys Vlasenkof6e3f852018-12-17 21:05:09 +01005763 if (!sc && !ib)
5764 bc_num_copy(&G.prog.ob, l);
Gavin Howard01055ba2018-11-03 11:00:21 -06005765
5766 *ptr = (size_t) val;
5767 s = BC_STATUS_SUCCESS;
5768 }
5769
5770 bc_num_init(&res.d.n, l->len);
5771 bc_num_copy(&res.d.n, l);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005772 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06005773
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005774 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005775}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005776#define zbc_program_assign(...) (zbc_program_assign(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005777
Denys Vlasenko416ce762018-12-02 20:57:17 +01005778#if !ENABLE_DC
5779#define bc_program_pushVar(code, bgn, pop, copy) \
5780 bc_program_pushVar(code, bgn)
5781// for bc, 'pop' and 'copy' are always false
5782#endif
Denys Vlasenkob402ff82018-12-11 15:45:15 +01005783static BC_STATUS bc_program_pushVar(char *code, size_t *bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06005784 bool pop, bool copy)
5785{
Gavin Howard01055ba2018-11-03 11:00:21 -06005786 BcResult r;
5787 char *name = bc_program_name(code, bgn);
Gavin Howard01055ba2018-11-03 11:00:21 -06005788
5789 r.t = BC_RESULT_VAR;
5790 r.d.id.name = name;
5791
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005792#if ENABLE_DC
Denys Vlasenko416ce762018-12-02 20:57:17 +01005793 {
5794 BcVec *v = bc_program_search(name, true);
5795 BcNum *num = bc_vec_top(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06005796
Denys Vlasenko416ce762018-12-02 20:57:17 +01005797 if (pop || copy) {
Gavin Howard01055ba2018-11-03 11:00:21 -06005798
Denys Vlasenko416ce762018-12-02 20:57:17 +01005799 if (!BC_PROG_STACK(v, 2 - copy)) {
5800 free(name);
Denys Vlasenkob402ff82018-12-11 15:45:15 +01005801 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenko416ce762018-12-02 20:57:17 +01005802 }
5803
Gavin Howard01055ba2018-11-03 11:00:21 -06005804 free(name);
Denys Vlasenko416ce762018-12-02 20:57:17 +01005805 name = NULL;
5806
5807 if (!BC_PROG_STR(num)) {
5808
5809 r.t = BC_RESULT_TEMP;
5810
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005811 bc_num_init_DEF_SIZE(&r.d.n);
Denys Vlasenko416ce762018-12-02 20:57:17 +01005812 bc_num_copy(&r.d.n, num);
5813 }
5814 else {
5815 r.t = BC_RESULT_STR;
5816 r.d.id.idx = num->rdx;
5817 }
5818
5819 if (!copy) bc_vec_pop(v);
Gavin Howard01055ba2018-11-03 11:00:21 -06005820 }
Gavin Howard01055ba2018-11-03 11:00:21 -06005821 }
5822#endif // ENABLE_DC
5823
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005824 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005825
Denys Vlasenkob402ff82018-12-11 15:45:15 +01005826 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005827}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005828#define zbc_program_pushVar(...) (bc_program_pushVar(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005829
Denys Vlasenko29301232018-12-11 15:29:32 +01005830static BC_STATUS zbc_program_pushArray(char *code, size_t *bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06005831 char inst)
5832{
5833 BcStatus s = BC_STATUS_SUCCESS;
5834 BcResult r;
5835 BcNum *num;
5836
5837 r.d.id.name = bc_program_name(code, bgn);
5838
5839 if (inst == BC_INST_ARRAY) {
5840 r.t = BC_RESULT_ARRAY;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005841 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06005842 }
5843 else {
5844
5845 BcResult *operand;
5846 unsigned long temp;
5847
Denys Vlasenko29301232018-12-11 15:29:32 +01005848 s = zbc_program_prep(&operand, &num);
Gavin Howard01055ba2018-11-03 11:00:21 -06005849 if (s) goto err;
Denys Vlasenko29301232018-12-11 15:29:32 +01005850 s = zbc_num_ulong(num, &temp);
Gavin Howard01055ba2018-11-03 11:00:21 -06005851 if (s) goto err;
5852
5853 if (temp > BC_MAX_DIM) {
Denys Vlasenko64074a12018-12-07 15:50:14 +01005854 s = bc_error("array too long; must be [1,"BC_MAX_DIM_STR"]");
Gavin Howard01055ba2018-11-03 11:00:21 -06005855 goto err;
5856 }
5857
5858 r.d.id.idx = (size_t) temp;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005859 bc_program_retire(&r, BC_RESULT_ARRAY_ELEM);
Gavin Howard01055ba2018-11-03 11:00:21 -06005860 }
5861
5862err:
5863 if (s) free(r.d.id.name);
Denys Vlasenko29301232018-12-11 15:29:32 +01005864 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005865}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005866#define zbc_program_pushArray(...) (zbc_program_pushArray(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005867
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01005868#if ENABLE_BC
Denys Vlasenko29301232018-12-11 15:29:32 +01005869static BC_STATUS zbc_program_incdec(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005870{
5871 BcStatus s;
5872 BcResult *ptr, res, copy;
5873 BcNum *num = NULL;
5874 char inst2 = inst;
5875
Denys Vlasenko29301232018-12-11 15:29:32 +01005876 s = zbc_program_prep(&ptr, &num);
5877 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005878
5879 if (inst == BC_INST_INC_POST || inst == BC_INST_DEC_POST) {
5880 copy.t = BC_RESULT_TEMP;
5881 bc_num_init(&copy.d.n, num->len);
5882 bc_num_copy(&copy.d.n, num);
5883 }
5884
5885 res.t = BC_RESULT_ONE;
5886 inst = inst == BC_INST_INC_PRE || inst == BC_INST_INC_POST ?
5887 BC_INST_ASSIGN_PLUS :
5888 BC_INST_ASSIGN_MINUS;
5889
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005890 bc_vec_push(&G.prog.results, &res);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01005891 s = zbc_program_assign(inst);
5892 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005893
5894 if (inst2 == BC_INST_INC_POST || inst2 == BC_INST_DEC_POST) {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005895 bc_vec_pop(&G.prog.results);
5896 bc_vec_push(&G.prog.results, &copy);
Gavin Howard01055ba2018-11-03 11:00:21 -06005897 }
5898
Denys Vlasenko29301232018-12-11 15:29:32 +01005899 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005900}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005901#define zbc_program_incdec(...) (zbc_program_incdec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005902
Denys Vlasenko29301232018-12-11 15:29:32 +01005903static BC_STATUS zbc_program_call(char *code, size_t *idx)
Gavin Howard01055ba2018-11-03 11:00:21 -06005904{
Gavin Howard01055ba2018-11-03 11:00:21 -06005905 BcInstPtr ip;
5906 size_t i, nparams = bc_program_index(code, idx);
5907 BcFunc *func;
Gavin Howard01055ba2018-11-03 11:00:21 -06005908 BcId *a;
5909 BcResultData param;
5910 BcResult *arg;
5911
5912 ip.idx = 0;
5913 ip.func = bc_program_index(code, idx);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005914 func = bc_program_func(ip.func);
Gavin Howard01055ba2018-11-03 11:00:21 -06005915
Denys Vlasenko04a1c762018-12-03 21:10:57 +01005916 if (func->code.len == 0) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005917 RETURN_STATUS(bc_error("undefined function"));
Denys Vlasenko04a1c762018-12-03 21:10:57 +01005918 }
5919 if (nparams != func->nparams) {
Denys Vlasenko29301232018-12-11 15:29:32 +01005920 RETURN_STATUS(bc_error_fmt("function has %u parameters, but called with %u", func->nparams, nparams));
Denys Vlasenko04a1c762018-12-03 21:10:57 +01005921 }
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005922 ip.len = G.prog.results.len - nparams;
Gavin Howard01055ba2018-11-03 11:00:21 -06005923
5924 for (i = 0; i < nparams; ++i) {
Denys Vlasenko628bf1b2018-12-10 20:41:05 +01005925 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06005926
5927 a = bc_vec_item(&func->autos, nparams - 1 - i);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005928 arg = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005929
5930 if ((!a->idx) != (arg->t == BC_RESULT_ARRAY) || arg->t == BC_RESULT_STR)
Denys Vlasenko29301232018-12-11 15:29:32 +01005931 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06005932
Denys Vlasenko29301232018-12-11 15:29:32 +01005933 s = zbc_program_copyToVar(a->name, a->idx);
5934 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005935 }
5936
5937 for (; i < func->autos.len; ++i) {
Denys Vlasenkodf515392018-12-02 19:27:48 +01005938 BcVec *v;
Gavin Howard01055ba2018-11-03 11:00:21 -06005939
5940 a = bc_vec_item(&func->autos, i);
Denys Vlasenkodf515392018-12-02 19:27:48 +01005941 v = bc_program_search(a->name, a->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005942
5943 if (a->idx) {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005944 bc_num_init_DEF_SIZE(&param.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06005945 bc_vec_push(v, &param.n);
5946 }
5947 else {
5948 bc_array_init(&param.v, true);
5949 bc_vec_push(v, &param.v);
5950 }
5951 }
5952
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005953 bc_vec_push(&G.prog.stack, &ip);
Gavin Howard01055ba2018-11-03 11:00:21 -06005954
Denys Vlasenko29301232018-12-11 15:29:32 +01005955 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06005956}
Denys Vlasenkoec603182018-12-17 10:34:02 +01005957#define zbc_program_call(...) (zbc_program_call(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06005958
Denys Vlasenko29301232018-12-11 15:29:32 +01005959static BC_STATUS zbc_program_return(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06005960{
Gavin Howard01055ba2018-11-03 11:00:21 -06005961 BcResult res;
5962 BcFunc *f;
5963 size_t i;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005964 BcInstPtr *ip = bc_vec_top(&G.prog.stack);
Gavin Howard01055ba2018-11-03 11:00:21 -06005965
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005966 if (!BC_PROG_STACK(&G.prog.results, ip->len + inst == BC_INST_RET))
Denys Vlasenko29301232018-12-11 15:29:32 +01005967 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06005968
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01005969 f = bc_program_func(ip->func);
Gavin Howard01055ba2018-11-03 11:00:21 -06005970 res.t = BC_RESULT_TEMP;
5971
5972 if (inst == BC_INST_RET) {
Denys Vlasenko628bf1b2018-12-10 20:41:05 +01005973 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06005974 BcNum *num;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005975 BcResult *operand = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06005976
Denys Vlasenko29301232018-12-11 15:29:32 +01005977 s = zbc_program_num(operand, &num, false);
5978 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06005979 bc_num_init(&res.d.n, num->len);
5980 bc_num_copy(&res.d.n, num);
5981 }
5982 else {
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01005983 bc_num_init_DEF_SIZE(&res.d.n);
Denys Vlasenko3129f702018-12-09 12:04:44 +01005984 //bc_num_zero(&res.d.n); - already is
Gavin Howard01055ba2018-11-03 11:00:21 -06005985 }
5986
5987 // We need to pop arguments as well, so this takes that into account.
5988 for (i = 0; i < f->autos.len; ++i) {
Gavin Howard01055ba2018-11-03 11:00:21 -06005989 BcVec *v;
5990 BcId *a = bc_vec_item(&f->autos, i);
5991
Denys Vlasenkodf515392018-12-02 19:27:48 +01005992 v = bc_program_search(a->name, a->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06005993 bc_vec_pop(v);
5994 }
5995
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01005996 bc_vec_npop(&G.prog.results, G.prog.results.len - ip->len);
5997 bc_vec_push(&G.prog.results, &res);
5998 bc_vec_pop(&G.prog.stack);
Gavin Howard01055ba2018-11-03 11:00:21 -06005999
Denys Vlasenko29301232018-12-11 15:29:32 +01006000 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006001}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006002#define zbc_program_return(...) (zbc_program_return(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006003#endif // ENABLE_BC
6004
6005static unsigned long bc_program_scale(BcNum *n)
6006{
6007 return (unsigned long) n->rdx;
6008}
6009
6010static unsigned long bc_program_len(BcNum *n)
6011{
Denys Vlasenkoa7f1a362018-12-10 12:57:01 +01006012 size_t len = n->len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006013
Denys Vlasenkoa7f1a362018-12-10 12:57:01 +01006014 if (n->rdx != len) return len;
6015 for (;;) {
6016 if (len == 0) break;
6017 len--;
6018 if (n->num[len] != 0) break;
6019 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006020 return len;
6021}
6022
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006023static BC_STATUS zbc_program_builtin(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06006024{
6025 BcStatus s;
6026 BcResult *opnd;
6027 BcNum *num = NULL;
6028 BcResult res;
6029 bool len = inst == BC_INST_LENGTH;
6030
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006031 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006032 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006033 opnd = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006034
Denys Vlasenko29301232018-12-11 15:29:32 +01006035 s = zbc_program_num(opnd, &num, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006036 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006037
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006038#if ENABLE_DC
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006039 if (!BC_PROG_NUM(opnd, num) && !len)
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006040 RETURN_STATUS(bc_error_variable_is_wrong_type());
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006041#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06006042
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006043 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006044
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006045 if (inst == BC_INST_SQRT) s = zbc_num_sqrt(num, &res.d.n, G.prog.scale);
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006046#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -06006047 else if (len != 0 && opnd->t == BC_RESULT_ARRAY) {
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006048 bc_num_ulong2num(&res.d.n, (unsigned long) ((BcVec *) num)->len);
Gavin Howard01055ba2018-11-03 11:00:21 -06006049 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006050#endif
6051#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06006052 else if (len != 0 && !BC_PROG_NUM(opnd, num)) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006053 char **str;
6054 size_t idx = opnd->t == BC_RESULT_STR ? opnd->d.id.idx : num->rdx;
6055
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006056 str = bc_program_str(idx);
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006057 bc_num_ulong2num(&res.d.n, strlen(*str));
Gavin Howard01055ba2018-11-03 11:00:21 -06006058 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006059#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06006060 else {
Denys Vlasenko5ba55f12018-12-10 15:37:14 +01006061 bc_num_ulong2num(&res.d.n, len ? bc_program_len(num) : bc_program_scale(num));
Gavin Howard01055ba2018-11-03 11:00:21 -06006062 }
6063
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006064 bc_program_retire(&res, BC_RESULT_TEMP);
Gavin Howard01055ba2018-11-03 11:00:21 -06006065
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006066 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006067}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006068#define zbc_program_builtin(...) (zbc_program_builtin(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006069
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006070#if ENABLE_DC
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006071static BC_STATUS zbc_program_divmod(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006072{
6073 BcStatus s;
6074 BcResult *opd1, *opd2, res, res2;
6075 BcNum *n1, *n2 = NULL;
6076
Denys Vlasenko29301232018-12-11 15:29:32 +01006077 s = zbc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006078 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006079
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006080 bc_num_init_DEF_SIZE(&res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006081 bc_num_init(&res2.d.n, n2->len);
6082
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006083 s = zbc_num_divmod(n1, n2, &res2.d.n, &res.d.n, G.prog.scale);
Gavin Howard01055ba2018-11-03 11:00:21 -06006084 if (s) goto err;
6085
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006086 bc_program_binOpRetire(&res2);
Gavin Howard01055ba2018-11-03 11:00:21 -06006087 res.t = BC_RESULT_TEMP;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006088 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006089
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006090 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006091
6092err:
6093 bc_num_free(&res2.d.n);
6094 bc_num_free(&res.d.n);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006095 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006096}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006097#define zbc_program_divmod(...) (zbc_program_divmod(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006098
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006099static BC_STATUS zbc_program_modexp(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006100{
6101 BcStatus s;
6102 BcResult *r1, *r2, *r3, res;
6103 BcNum *n1, *n2, *n3;
6104
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006105 if (!BC_PROG_STACK(&G.prog.results, 3))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006106 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenko29301232018-12-11 15:29:32 +01006107 s = zbc_program_binOpPrep(&r2, &n2, &r3, &n3, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006108 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006109
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006110 r1 = bc_vec_item_rev(&G.prog.results, 2);
Denys Vlasenko29301232018-12-11 15:29:32 +01006111 s = zbc_program_num(r1, &n1, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006112 if (s) RETURN_STATUS(s);
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006113 if (!BC_PROG_NUM(r1, n1))
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006114 RETURN_STATUS(bc_error_variable_is_wrong_type());
Gavin Howard01055ba2018-11-03 11:00:21 -06006115
6116 // Make sure that the values have their pointers updated, if necessary.
6117 if (r1->t == BC_RESULT_VAR || r1->t == BC_RESULT_ARRAY_ELEM) {
6118
6119 if (r1->t == r2->t) {
Denys Vlasenko29301232018-12-11 15:29:32 +01006120 s = zbc_program_num(r2, &n2, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006121 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006122 }
6123
6124 if (r1->t == r3->t) {
Denys Vlasenko29301232018-12-11 15:29:32 +01006125 s = zbc_program_num(r3, &n3, false);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006126 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006127 }
6128 }
6129
6130 bc_num_init(&res.d.n, n3->len);
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006131 s = zbc_num_modexp(n1, n2, n3, &res.d.n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006132 if (s) goto err;
6133
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006134 bc_vec_pop(&G.prog.results);
6135 bc_program_binOpRetire(&res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006136
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006137 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006138
6139err:
6140 bc_num_free(&res.d.n);
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006141 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006142}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006143#define zbc_program_modexp(...) (zbc_program_modexp(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006144
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006145static void bc_program_stackLen(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006146{
Gavin Howard01055ba2018-11-03 11:00:21 -06006147 BcResult res;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006148 size_t len = G.prog.results.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006149
6150 res.t = BC_RESULT_TEMP;
6151
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006152 bc_num_init_DEF_SIZE(&res.d.n);
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006153 bc_num_ulong2num(&res.d.n, len);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006154 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006155}
6156
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006157static BC_STATUS zbc_program_asciify(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006158{
6159 BcStatus s;
6160 BcResult *r, res;
Denys Vlasenko4a024c72018-12-09 13:21:54 +01006161 BcNum *num, n;
Gavin Howard01055ba2018-11-03 11:00:21 -06006162 char *str, *str2, c;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006163 size_t len = G.prog.strs.len, idx;
Gavin Howard01055ba2018-11-03 11:00:21 -06006164 unsigned long val;
6165
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006166 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006167 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006168 r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006169
Denys Vlasenko4a024c72018-12-09 13:21:54 +01006170 num = NULL; // TODO: is this NULL needed?
Denys Vlasenko29301232018-12-11 15:29:32 +01006171 s = zbc_program_num(r, &num, false);
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006172 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006173
6174 if (BC_PROG_NUM(r, num)) {
6175
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006176 bc_num_init_DEF_SIZE(&n);
Gavin Howard01055ba2018-11-03 11:00:21 -06006177 bc_num_copy(&n, num);
6178 bc_num_truncate(&n, n.rdx);
6179
Denys Vlasenko1aeacef2018-12-11 19:12:13 +01006180 s = zbc_num_mod(&n, &G.prog.strmb, &n, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06006181 if (s) goto num_err;
Denys Vlasenko29301232018-12-11 15:29:32 +01006182 s = zbc_num_ulong(&n, &val);
Gavin Howard01055ba2018-11-03 11:00:21 -06006183 if (s) goto num_err;
6184
6185 c = (char) val;
6186
6187 bc_num_free(&n);
6188 }
6189 else {
6190 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006191 str2 = *bc_program_str(idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006192 c = str2[0];
6193 }
6194
Denys Vlasenkofa35e592018-12-10 20:17:24 +01006195 str = xzalloc(2);
Gavin Howard01055ba2018-11-03 11:00:21 -06006196 str[0] = c;
Denys Vlasenkofa35e592018-12-10 20:17:24 +01006197 //str[1] = '\0'; - already is
Gavin Howard01055ba2018-11-03 11:00:21 -06006198
6199 str2 = xstrdup(str);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006200 bc_program_addFunc(str2, &idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006201
6202 if (idx != len + BC_PROG_REQ_FUNCS) {
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006203 for (idx = 0; idx < G.prog.strs.len; ++idx) {
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006204 if (strcmp(*bc_program_str(idx), str) == 0) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006205 len = idx;
6206 break;
6207 }
6208 }
6209
6210 free(str);
6211 }
6212 else
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006213 bc_vec_push(&G.prog.strs, &str);
Gavin Howard01055ba2018-11-03 11:00:21 -06006214
6215 res.t = BC_RESULT_STR;
6216 res.d.id.idx = len;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006217 bc_vec_pop(&G.prog.results);
6218 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006219
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006220 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006221
6222num_err:
6223 bc_num_free(&n);
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006224 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006225}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006226#define zbc_program_asciify(...) (zbc_program_asciify(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006227
Denys Vlasenko29301232018-12-11 15:29:32 +01006228static BC_STATUS zbc_program_printStream(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006229{
6230 BcStatus s;
6231 BcResult *r;
6232 BcNum *n = NULL;
6233 size_t idx;
6234 char *str;
6235
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006236 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko29301232018-12-11 15:29:32 +01006237 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006238 r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006239
Denys Vlasenko29301232018-12-11 15:29:32 +01006240 s = zbc_program_num(r, &n, false);
6241 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006242
Denys Vlasenko57734c92018-12-17 21:14:05 +01006243 if (BC_PROG_NUM(r, n)) {
6244 s = zbc_num_printNum(n, &G.prog.strmb, 1, bc_num_printChar);
6245 } else {
Gavin Howard01055ba2018-11-03 11:00:21 -06006246 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : n->rdx;
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006247 str = *bc_program_str(idx);
Denys Vlasenko00d77792018-11-30 23:13:42 +01006248 printf("%s", str);
Gavin Howard01055ba2018-11-03 11:00:21 -06006249 }
6250
Denys Vlasenko29301232018-12-11 15:29:32 +01006251 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006252}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006253#define zbc_program_printStream(...) (zbc_program_printStream(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006254
Denys Vlasenko29301232018-12-11 15:29:32 +01006255static BC_STATUS zbc_program_nquit(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006256{
6257 BcStatus s;
6258 BcResult *opnd;
6259 BcNum *num = NULL;
6260 unsigned long val;
6261
Denys Vlasenko29301232018-12-11 15:29:32 +01006262 s = zbc_program_prep(&opnd, &num);
6263 if (s) RETURN_STATUS(s);
6264 s = zbc_num_ulong(num, &val);
6265 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006266
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006267 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006268
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006269 if (G.prog.stack.len < val)
Denys Vlasenko29301232018-12-11 15:29:32 +01006270 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01006271 if (G.prog.stack.len == val) {
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01006272 QUIT_OR_RETURN_TO_MAIN;
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01006273 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006274
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006275 bc_vec_npop(&G.prog.stack, val);
Gavin Howard01055ba2018-11-03 11:00:21 -06006276
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_nquit(...) (zbc_program_nquit(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006280
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006281static BC_STATUS zbc_program_execStr(char *code, size_t *bgn,
Gavin Howard01055ba2018-11-03 11:00:21 -06006282 bool cond)
6283{
6284 BcStatus s = BC_STATUS_SUCCESS;
6285 BcResult *r;
6286 char **str;
6287 BcFunc *f;
6288 BcParse prs;
6289 BcInstPtr ip;
6290 size_t fidx, sidx;
Gavin Howard01055ba2018-11-03 11:00:21 -06006291
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006292 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006293 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Gavin Howard01055ba2018-11-03 11:00:21 -06006294
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006295 r = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006296
6297 if (cond) {
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006298 BcNum *n = n; // for compiler
6299 bool exec;
6300 char *name;
6301 char *then_name = bc_program_name(code, bgn);
6302 char *else_name = NULL;
Gavin Howard01055ba2018-11-03 11:00:21 -06006303
6304 if (code[*bgn] == BC_PARSE_STREND)
6305 (*bgn) += 1;
6306 else
6307 else_name = bc_program_name(code, bgn);
6308
6309 exec = r->d.n.len != 0;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006310 name = then_name;
6311 if (!exec && else_name != NULL) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006312 exec = true;
6313 name = else_name;
6314 }
6315
6316 if (exec) {
Denys Vlasenkodf515392018-12-02 19:27:48 +01006317 BcVec *v;
6318 v = bc_program_search(name, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06006319 n = bc_vec_top(v);
6320 }
6321
6322 free(then_name);
6323 free(else_name);
6324
6325 if (!exec) goto exit;
6326 if (!BC_PROG_STR(n)) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01006327 s = bc_error_variable_is_wrong_type();
Gavin Howard01055ba2018-11-03 11:00:21 -06006328 goto exit;
6329 }
6330
6331 sidx = n->rdx;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006332 } else {
6333 if (r->t == BC_RESULT_STR) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006334 sidx = r->d.id.idx;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006335 } else if (r->t == BC_RESULT_VAR) {
6336 BcNum *n;
Denys Vlasenko29301232018-12-11 15:29:32 +01006337 s = zbc_program_num(r, &n, false);
Gavin Howard01055ba2018-11-03 11:00:21 -06006338 if (s || !BC_PROG_STR(n)) goto exit;
6339 sidx = n->rdx;
Denys Vlasenko5ec4b492018-12-09 02:54:06 +01006340 } else
Gavin Howard01055ba2018-11-03 11:00:21 -06006341 goto exit;
6342 }
6343
6344 fidx = sidx + BC_PROG_REQ_FUNCS;
6345
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006346 str = bc_program_str(sidx);
6347 f = bc_program_func(fidx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006348
6349 if (f->code.len == 0) {
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01006350 bc_parse_create(&prs, fidx);
Denys Vlasenkof86e9602018-12-14 17:01:56 +01006351 s = zbc_parse_text_init(&prs, *str);
Gavin Howard01055ba2018-11-03 11:00:21 -06006352 if (s) goto err;
Denys Vlasenkoae0faf92018-12-12 15:19:54 +01006353 s = zcommon_parse_expr(&prs, BC_PARSE_NOCALL);
Gavin Howard01055ba2018-11-03 11:00:21 -06006354 if (s) goto err;
6355
6356 if (prs.l.t.t != BC_LEX_EOF) {
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01006357 s = bc_error_bad_expression();
Gavin Howard01055ba2018-11-03 11:00:21 -06006358 goto err;
6359 }
6360
6361 bc_parse_free(&prs);
6362 }
6363
6364 ip.idx = 0;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006365 ip.len = G.prog.results.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006366 ip.func = fidx;
6367
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006368 bc_vec_pop(&G.prog.results);
6369 bc_vec_push(&G.prog.stack, &ip);
Gavin Howard01055ba2018-11-03 11:00:21 -06006370
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006371 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006372
6373err:
6374 bc_parse_free(&prs);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006375 f = bc_program_func(fidx);
Denys Vlasenko7d628012018-12-04 21:46:47 +01006376 bc_vec_pop_all(&f->code);
Gavin Howard01055ba2018-11-03 11:00:21 -06006377exit:
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006378 bc_vec_pop(&G.prog.results);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006379 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006380}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006381#define zbc_program_execStr(...) (zbc_program_execStr(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006382#endif // ENABLE_DC
6383
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006384static void bc_program_pushGlobal(char inst)
Gavin Howard01055ba2018-11-03 11:00:21 -06006385{
Gavin Howard01055ba2018-11-03 11:00:21 -06006386 BcResult res;
6387 unsigned long val;
6388
6389 res.t = inst - BC_INST_IBASE + BC_RESULT_IBASE;
6390 if (inst == BC_INST_IBASE)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006391 val = (unsigned long) G.prog.ib_t;
Gavin Howard01055ba2018-11-03 11:00:21 -06006392 else if (inst == BC_INST_SCALE)
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006393 val = (unsigned long) G.prog.scale;
Gavin Howard01055ba2018-11-03 11:00:21 -06006394 else
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006395 val = (unsigned long) G.prog.ob_t;
Gavin Howard01055ba2018-11-03 11:00:21 -06006396
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006397 bc_num_init_DEF_SIZE(&res.d.n);
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006398 bc_num_ulong2num(&res.d.n, val);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006399 bc_vec_push(&G.prog.results, &res);
Gavin Howard01055ba2018-11-03 11:00:21 -06006400}
6401
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006402static void bc_program_addFunc(char *name, size_t *idx)
Gavin Howard01055ba2018-11-03 11:00:21 -06006403{
Gavin Howard01055ba2018-11-03 11:00:21 -06006404 BcId entry, *entry_ptr;
6405 BcFunc f;
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01006406 int inserted;
Gavin Howard01055ba2018-11-03 11:00:21 -06006407
6408 entry.name = name;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006409 entry.idx = G.prog.fns.len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006410
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01006411 inserted = bc_map_insert(&G.prog.fn_map, &entry, idx);
6412 if (!inserted) free(name);
Gavin Howard01055ba2018-11-03 11:00:21 -06006413
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006414 entry_ptr = bc_vec_item(&G.prog.fn_map, *idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006415 *idx = entry_ptr->idx;
6416
Denys Vlasenkoa02f8442018-12-03 20:35:16 +01006417 if (!inserted) {
Gavin Howard01055ba2018-11-03 11:00:21 -06006418
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006419 BcFunc *func = bc_program_func(entry_ptr->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006420
6421 // We need to reset these, so the function can be repopulated.
6422 func->nparams = 0;
Denys Vlasenko7d628012018-12-04 21:46:47 +01006423 bc_vec_pop_all(&func->autos);
6424 bc_vec_pop_all(&func->code);
6425 bc_vec_pop_all(&func->labels);
Gavin Howard01055ba2018-11-03 11:00:21 -06006426 }
6427 else {
6428 bc_func_init(&f);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006429 bc_vec_push(&G.prog.fns, &f);
Gavin Howard01055ba2018-11-03 11:00:21 -06006430 }
6431}
6432
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006433static BC_STATUS zbc_program_exec(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06006434{
Gavin Howard01055ba2018-11-03 11:00:21 -06006435 BcResult r, *ptr;
6436 BcNum *num;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006437 BcInstPtr *ip = bc_vec_top(&G.prog.stack);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006438 BcFunc *func = bc_program_func(ip->func);
Gavin Howard01055ba2018-11-03 11:00:21 -06006439 char *code = func->code.v;
Gavin Howard01055ba2018-11-03 11:00:21 -06006440
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006441 while (ip->idx < func->code.len) {
Denys Vlasenkofa35e592018-12-10 20:17:24 +01006442 BcStatus s = BC_STATUS_SUCCESS;
Gavin Howard01055ba2018-11-03 11:00:21 -06006443 char inst = code[(ip->idx)++];
6444
Denys Vlasenko99b37622018-12-15 20:06:59 +01006445 dbg_exec("inst:%d", inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006446 switch (inst) {
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006447#if ENABLE_BC
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006448 case BC_INST_JUMP_ZERO: {
6449 bool zero;
Denys Vlasenko99b37622018-12-15 20:06:59 +01006450 dbg_exec("BC_INST_JUMP_ZERO:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006451 s = zbc_program_prep(&ptr, &num);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006452 if (s) RETURN_STATUS(s);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006453 zero = (bc_num_cmp(num, &G.prog.zero) == 0);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006454 bc_vec_pop(&G.prog.results);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006455 if (!zero) {
6456 bc_program_index(code, &ip->idx);
6457 break;
6458 }
6459 // else: fall through
6460 }
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006461 case BC_INST_JUMP: {
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006462 size_t idx = bc_program_index(code, &ip->idx);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006463 size_t *addr = bc_vec_item(&func->labels, idx);
Denys Vlasenko99b37622018-12-15 20:06:59 +01006464 dbg_exec("BC_INST_JUMP: to %ld", (long)*addr);
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006465 ip->idx = *addr;
Gavin Howard01055ba2018-11-03 11:00:21 -06006466 break;
6467 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006468 case BC_INST_CALL:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006469 dbg_exec("BC_INST_CALL:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006470 s = zbc_program_call(code, &ip->idx);
Gavin Howard01055ba2018-11-03 11:00:21 -06006471 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006472 case BC_INST_INC_PRE:
6473 case BC_INST_DEC_PRE:
6474 case BC_INST_INC_POST:
6475 case BC_INST_DEC_POST:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006476 dbg_exec("BC_INST_INCDEC:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006477 s = zbc_program_incdec(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006478 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006479 case BC_INST_HALT:
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006480 dbg_exec("BC_INST_HALT:");
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01006481 QUIT_OR_RETURN_TO_MAIN;
Gavin Howard01055ba2018-11-03 11:00:21 -06006482 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006483 case BC_INST_RET:
6484 case BC_INST_RET0:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006485 dbg_exec("BC_INST_RET[0]:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006486 s = zbc_program_return(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006487 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006488 case BC_INST_BOOL_OR:
6489 case BC_INST_BOOL_AND:
6490#endif // ENABLE_BC
6491 case BC_INST_REL_EQ:
6492 case BC_INST_REL_LE:
6493 case BC_INST_REL_GE:
6494 case BC_INST_REL_NE:
6495 case BC_INST_REL_LT:
6496 case BC_INST_REL_GT:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006497 dbg_exec("BC_INST_BOOL:");
Denys Vlasenko728e7c92018-12-11 19:37:00 +01006498 s = zbc_program_logical(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006499 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006500 case BC_INST_READ:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006501 dbg_exec("BC_INST_READ:");
Denys Vlasenko26819db2018-12-12 16:08:46 +01006502 s = zbc_program_read();
Gavin Howard01055ba2018-11-03 11:00:21 -06006503 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006504 case BC_INST_VAR:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006505 dbg_exec("BC_INST_VAR:");
Denys Vlasenkob402ff82018-12-11 15:45:15 +01006506 s = zbc_program_pushVar(code, &ip->idx, false, false);
Gavin Howard01055ba2018-11-03 11:00:21 -06006507 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006508 case BC_INST_ARRAY_ELEM:
6509 case BC_INST_ARRAY:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006510 dbg_exec("BC_INST_ARRAY[_ELEM]:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006511 s = zbc_program_pushArray(code, &ip->idx, inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006512 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006513 case BC_INST_LAST:
Gavin Howard01055ba2018-11-03 11:00:21 -06006514 r.t = BC_RESULT_LAST;
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006515 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006516 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006517 case BC_INST_IBASE:
6518 case BC_INST_SCALE:
6519 case BC_INST_OBASE:
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006520 bc_program_pushGlobal(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006521 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006522 case BC_INST_SCALE_FUNC:
6523 case BC_INST_LENGTH:
6524 case BC_INST_SQRT:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006525 dbg_exec("BC_INST_builtin:");
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006526 s = zbc_program_builtin(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006527 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006528 case BC_INST_NUM:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006529 dbg_exec("BC_INST_NUM:");
Gavin Howard01055ba2018-11-03 11:00:21 -06006530 r.t = BC_RESULT_CONSTANT;
6531 r.d.id.idx = bc_program_index(code, &ip->idx);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006532 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006533 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006534 case BC_INST_POP:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006535 dbg_exec("BC_INST_POP:");
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006536 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenko24fb2cd2018-12-05 16:03:46 +01006537 s = bc_error_stack_has_too_few_elements();
Gavin Howard01055ba2018-11-03 11:00:21 -06006538 else
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006539 bc_vec_pop(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006540 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006541 case BC_INST_POP_EXEC:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006542 dbg_exec("BC_INST_POP_EXEC:");
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006543 bc_vec_pop(&G.prog.stack);
Gavin Howard01055ba2018-11-03 11:00:21 -06006544 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006545 case BC_INST_PRINT:
6546 case BC_INST_PRINT_POP:
6547 case BC_INST_PRINT_STR:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006548 dbg_exec("BC_INST_PRINTxyz:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006549 s = zbc_program_print(inst, 0);
Gavin Howard01055ba2018-11-03 11:00:21 -06006550 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006551 case BC_INST_STR:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006552 dbg_exec("BC_INST_STR:");
Gavin Howard01055ba2018-11-03 11:00:21 -06006553 r.t = BC_RESULT_STR;
6554 r.d.id.idx = bc_program_index(code, &ip->idx);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006555 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006556 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006557 case BC_INST_POWER:
6558 case BC_INST_MULTIPLY:
6559 case BC_INST_DIVIDE:
6560 case BC_INST_MODULUS:
6561 case BC_INST_PLUS:
6562 case BC_INST_MINUS:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006563 dbg_exec("BC_INST_binaryop:");
Denys Vlasenko259137d2018-12-11 19:42:05 +01006564 s = zbc_program_op(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006565 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006566 case BC_INST_BOOL_NOT:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006567 dbg_exec("BC_INST_BOOL_NOT:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006568 s = zbc_program_prep(&ptr, &num);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006569 if (s) RETURN_STATUS(s);
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01006570 bc_num_init_DEF_SIZE(&r.d.n);
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006571 if (!bc_num_cmp(num, &G.prog.zero))
6572 bc_num_one(&r.d.n);
Denys Vlasenko3129f702018-12-09 12:04:44 +01006573 //else bc_num_zero(&r.d.n); - already is
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006574 bc_program_retire(&r, BC_RESULT_TEMP);
Gavin Howard01055ba2018-11-03 11:00:21 -06006575 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006576 case BC_INST_NEG:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006577 dbg_exec("BC_INST_NEG:");
Denys Vlasenko29301232018-12-11 15:29:32 +01006578 s = zbc_program_negate();
Gavin Howard01055ba2018-11-03 11:00:21 -06006579 break;
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006580#if ENABLE_BC
Gavin Howard01055ba2018-11-03 11:00:21 -06006581 case BC_INST_ASSIGN_POWER:
6582 case BC_INST_ASSIGN_MULTIPLY:
6583 case BC_INST_ASSIGN_DIVIDE:
6584 case BC_INST_ASSIGN_MODULUS:
6585 case BC_INST_ASSIGN_PLUS:
6586 case BC_INST_ASSIGN_MINUS:
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006587#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06006588 case BC_INST_ASSIGN:
Denys Vlasenko99b37622018-12-15 20:06:59 +01006589 dbg_exec("BC_INST_ASSIGNxyz:");
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006590 s = zbc_program_assign(inst);
Gavin Howard01055ba2018-11-03 11:00:21 -06006591 break;
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01006592#if ENABLE_DC
Gavin Howard01055ba2018-11-03 11:00:21 -06006593 case BC_INST_MODEXP:
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006594 s = zbc_program_modexp();
Gavin Howard01055ba2018-11-03 11:00:21 -06006595 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006596 case BC_INST_DIVMOD:
Denys Vlasenko7f4daa42018-12-11 19:04:44 +01006597 s = zbc_program_divmod();
Gavin Howard01055ba2018-11-03 11:00:21 -06006598 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006599 case BC_INST_EXECUTE:
6600 case BC_INST_EXEC_COND:
Denys Vlasenkofd51e0c2018-12-15 15:07:14 +01006601 s = zbc_program_execStr(code, &ip->idx, inst == BC_INST_EXEC_COND);
Gavin Howard01055ba2018-11-03 11:00:21 -06006602 break;
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006603 case BC_INST_PRINT_STACK: {
6604 size_t idx;
6605 for (idx = 0; idx < G.prog.results.len; ++idx) {
Denys Vlasenko29301232018-12-11 15:29:32 +01006606 s = zbc_program_print(BC_INST_PRINT, idx);
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006607 if (s) break;
6608 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006609 break;
6610 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006611 case BC_INST_CLEAR_STACK:
Denys Vlasenko7d628012018-12-04 21:46:47 +01006612 bc_vec_pop_all(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006613 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006614 case BC_INST_STACK_LEN:
Denys Vlasenkoe3b4f232018-12-02 18:44:40 +01006615 bc_program_stackLen();
Gavin Howard01055ba2018-11-03 11:00:21 -06006616 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006617 case BC_INST_DUPLICATE:
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006618 if (!BC_PROG_STACK(&G.prog.results, 1))
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006619 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006620 ptr = bc_vec_top(&G.prog.results);
Gavin Howard01055ba2018-11-03 11:00:21 -06006621 bc_result_copy(&r, ptr);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006622 bc_vec_push(&G.prog.results, &r);
Gavin Howard01055ba2018-11-03 11:00:21 -06006623 break;
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006624 case BC_INST_SWAP: {
Gavin Howard01055ba2018-11-03 11:00:21 -06006625 BcResult *ptr2;
Denys Vlasenko60cf7472018-12-04 20:05:28 +01006626 if (!BC_PROG_STACK(&G.prog.results, 2))
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006627 RETURN_STATUS(bc_error_stack_has_too_few_elements());
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006628 ptr = bc_vec_item_rev(&G.prog.results, 0);
6629 ptr2 = bc_vec_item_rev(&G.prog.results, 1);
Gavin Howard01055ba2018-11-03 11:00:21 -06006630 memcpy(&r, ptr, sizeof(BcResult));
6631 memcpy(ptr, ptr2, sizeof(BcResult));
6632 memcpy(ptr2, &r, sizeof(BcResult));
Gavin Howard01055ba2018-11-03 11:00:21 -06006633 break;
6634 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006635 case BC_INST_ASCIIFY:
Denys Vlasenkoc008a732018-12-11 20:57:53 +01006636 s = zbc_program_asciify();
Gavin Howard01055ba2018-11-03 11:00:21 -06006637 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006638 case BC_INST_PRINT_STREAM:
Denys Vlasenko29301232018-12-11 15:29:32 +01006639 s = zbc_program_printStream();
Gavin Howard01055ba2018-11-03 11:00:21 -06006640 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006641 case BC_INST_LOAD:
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006642 case BC_INST_PUSH_VAR: {
Gavin Howard01055ba2018-11-03 11:00:21 -06006643 bool copy = inst == BC_INST_LOAD;
Denys Vlasenkob402ff82018-12-11 15:45:15 +01006644 s = zbc_program_pushVar(code, &ip->idx, true, copy);
Gavin Howard01055ba2018-11-03 11:00:21 -06006645 break;
6646 }
Denys Vlasenko927a7d62018-12-09 02:24:14 +01006647 case BC_INST_PUSH_TO_VAR: {
Gavin Howard01055ba2018-11-03 11:00:21 -06006648 char *name = bc_program_name(code, &ip->idx);
Denys Vlasenko29301232018-12-11 15:29:32 +01006649 s = zbc_program_copyToVar(name, true);
Gavin Howard01055ba2018-11-03 11:00:21 -06006650 free(name);
6651 break;
6652 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006653 case BC_INST_QUIT:
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006654 dbg_exec("BC_INST_NEG:");
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006655 if (G.prog.stack.len <= 2)
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01006656 QUIT_OR_RETURN_TO_MAIN;
Denys Vlasenkocfdc1332018-12-03 14:02:35 +01006657 bc_vec_npop(&G.prog.stack, 2);
Gavin Howard01055ba2018-11-03 11:00:21 -06006658 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006659 case BC_INST_NQUIT:
Denys Vlasenko29301232018-12-11 15:29:32 +01006660 s = zbc_program_nquit();
Gavin Howard01055ba2018-11-03 11:00:21 -06006661 break;
Gavin Howard01055ba2018-11-03 11:00:21 -06006662#endif // ENABLE_DC
6663 }
6664
Denys Vlasenkod38af482018-12-04 19:11:02 +01006665 if (s || G_interrupt) {
6666 bc_program_reset();
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006667 RETURN_STATUS(s);
Denys Vlasenkod38af482018-12-04 19:11:02 +01006668 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006669
Denys Vlasenkoc5774a32018-12-17 01:22:53 +01006670 fflush_and_check();
6671
Gavin Howard01055ba2018-11-03 11:00:21 -06006672 // If the stack has changed, pointers may be invalid.
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01006673 ip = bc_vec_top(&G.prog.stack);
Denys Vlasenko8fa1e8e2018-12-09 00:03:57 +01006674 func = bc_program_func(ip->func);
Gavin Howard01055ba2018-11-03 11:00:21 -06006675 code = func->code.v;
6676 }
6677
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006678 RETURN_STATUS(BC_STATUS_SUCCESS);
Gavin Howard01055ba2018-11-03 11:00:21 -06006679}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006680#define zbc_program_exec(...) (zbc_program_exec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006681
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006682static unsigned bc_vm_envLen(const char *var)
Gavin Howard01055ba2018-11-03 11:00:21 -06006683{
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006684 char *lenv;
6685 unsigned len;
Gavin Howard01055ba2018-11-03 11:00:21 -06006686
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006687 lenv = getenv(var);
6688 len = BC_NUM_PRINT_WIDTH;
Gavin Howard01055ba2018-11-03 11:00:21 -06006689 if (!lenv) return len;
6690
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01006691 len = bb_strtou(lenv, NULL, 10) - 1;
6692 if (errno || len < 2 || len >= INT_MAX)
Gavin Howard01055ba2018-11-03 11:00:21 -06006693 len = BC_NUM_PRINT_WIDTH;
6694
6695 return len;
6696}
6697
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006698static BC_STATUS zbc_vm_process(const char *text)
Gavin Howard01055ba2018-11-03 11:00:21 -06006699{
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006700 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06006701
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006702 dbg_lex_enter("%s:%d entered", __func__, __LINE__);
6703 s = zbc_parse_text_init(&G.prs, text);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006704 if (s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006705
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01006706 while (G.prs.l.t.t != BC_LEX_EOF) {
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006707 dbg_lex("%s:%d G.prs.l.t.t:%d", __func__, __LINE__, G.prs.l.t.t);
Denys Vlasenkoec603182018-12-17 10:34:02 +01006708 s = zcommon_parse(&G.prs);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006709 if (s) RETURN_STATUS(s);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006710 s = zbc_program_exec();
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006711 if (s) {
Denys Vlasenkod38af482018-12-04 19:11:02 +01006712 bc_program_reset();
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01006713 break;
6714 }
Gavin Howard01055ba2018-11-03 11:00:21 -06006715 }
6716
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01006717 dbg_lex_done("%s:%d done", __func__, __LINE__);
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006718 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006719}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006720#define zbc_vm_process(...) (zbc_vm_process(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006721
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006722static BC_STATUS zbc_vm_execute_FILE(FILE *fp, const char *filename)
Gavin Howard01055ba2018-11-03 11:00:21 -06006723{
Denys Vlasenko0fe270e2018-12-13 19:58:58 +01006724 // So far bc/dc have no way to include a file from another file,
6725 // therefore we know G.prog.file == NULL on entry
6726 //const char *sv_file;
Denys Vlasenko0409ad32018-12-05 16:39:22 +01006727 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06006728
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006729 G.prog.file = filename;
6730 G.input_fp = fp;
Denys Vlasenko0409ad32018-12-05 16:39:22 +01006731 bc_lex_file(&G.prs.l);
Gavin Howard01055ba2018-11-03 11:00:21 -06006732
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006733 do {
6734 s = zbc_vm_process("");
6735 // We do not stop looping on errors here if reading stdin.
6736 // Example: start interactive bc and enter "return".
6737 // It should say "'return' not in a function"
6738 // but should not exit.
6739 } while (G.input_fp == stdin);
Denys Vlasenko0fe270e2018-12-13 19:58:58 +01006740 G.prog.file = NULL;
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006741 RETURN_STATUS(s);
6742}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006743#define zbc_vm_execute_FILE(...) (zbc_vm_execute_FILE(__VA_ARGS__) COMMA_SUCCESS)
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01006744
6745static BC_STATUS zbc_vm_file(const char *file)
6746{
6747 BcStatus s;
6748 FILE *fp;
6749
6750 fp = xfopen_for_read(file);
6751 s = zbc_vm_execute_FILE(fp, file);
6752 fclose(fp);
6753
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01006754 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06006755}
Denys Vlasenkoec603182018-12-17 10:34:02 +01006756#define zbc_vm_file(...) (zbc_vm_file(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06006757
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006758#if ENABLE_BC
Denys Vlasenko57b69182018-12-14 00:12:13 +01006759static void bc_vm_info(void)
6760{
6761 printf("%s "BB_VER"\n"
6762 "Copyright (c) 2018 Gavin D. Howard and contributors\n"
6763 , applet_name);
6764}
6765
6766static void bc_args(char **argv)
6767{
6768 unsigned opts;
6769 int i;
6770
6771 GETOPT_RESET();
6772#if ENABLE_FEATURE_BC_LONG_OPTIONS
6773 opts = option_mask32 |= getopt32long(argv, "wvsqli",
6774 "warn\0" No_argument "w"
6775 "version\0" No_argument "v"
6776 "standard\0" No_argument "s"
6777 "quiet\0" No_argument "q"
6778 "mathlib\0" No_argument "l"
6779 "interactive\0" No_argument "i"
6780 );
6781#else
6782 opts = option_mask32 |= getopt32(argv, "wvsqli");
6783#endif
6784 if (getenv("POSIXLY_CORRECT"))
6785 option_mask32 |= BC_FLAG_S;
6786
6787 if (opts & BC_FLAG_V) {
6788 bc_vm_info();
6789 exit(0);
6790 }
6791
6792 for (i = optind; argv[i]; ++i)
6793 bc_vec_push(&G.files, argv + i);
6794}
6795
6796static void bc_vm_envArgs(void)
6797{
6798 BcVec v;
6799 char *buf;
6800 char *env_args = getenv("BC_ENV_ARGS");
6801
6802 if (!env_args) return;
6803
6804 G.env_args = xstrdup(env_args);
6805 buf = G.env_args;
6806
6807 bc_vec_init(&v, sizeof(char *), NULL);
6808
6809 while (*(buf = skip_whitespace(buf)) != '\0') {
6810 bc_vec_push(&v, &buf);
6811 buf = skip_non_whitespace(buf);
6812 if (!*buf)
6813 break;
6814 *buf++ = '\0';
6815 }
6816
6817 // NULL terminate, and pass argv[] so that first arg is argv[1]
6818 if (sizeof(int) == sizeof(char*)) {
6819 bc_vec_push(&v, &const_int_0);
6820 } else {
6821 static char *const nullptr = NULL;
6822 bc_vec_push(&v, &nullptr);
6823 }
6824 bc_args(((char **)v.v) - 1);
6825
6826 bc_vec_free(&v);
6827}
6828
6829static const char bc_lib[] ALIGN1 = {
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006830 "scale=20"
6831"\n" "define e(x){"
6832"\n" "auto b,s,n,r,d,i,p,f,v"
Denys Vlasenko203210e2018-12-14 09:53:50 +01006833////////////////"if(x<0)return(1/e(-x))" // and drop 'n' and x<0 logic below
6834//^^^^^^^^^^^^^^^^ this would work, and is even more precise than GNU bc:
6835//e(-.998896): GNU:.36828580434569428695
6836// above code:.36828580434569428696
6837// actual value:.3682858043456942869594...
6838// but for now let's be "GNU compatible"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006839"\n" "b=ibase"
6840"\n" "ibase=A"
6841"\n" "if(x<0){"
6842"\n" "n=1"
6843"\n" "x=-x"
6844"\n" "}"
6845"\n" "s=scale"
Denys Vlasenko146a79d2018-12-16 21:46:11 +01006846"\n" "r=6+s+.44*x"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006847"\n" "scale=scale(x)+1"
6848"\n" "while(x>1){"
6849"\n" "d+=1"
6850"\n" "x/=2"
6851"\n" "scale+=1"
6852"\n" "}"
6853"\n" "scale=r"
6854"\n" "r=x+1"
6855"\n" "p=x"
6856"\n" "f=v=1"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006857"\n" "for(i=2;v;++i){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006858"\n" "p*=x"
6859"\n" "f*=i"
6860"\n" "v=p/f"
6861"\n" "r+=v"
6862"\n" "}"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006863"\n" "while(d--)r*=r"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006864"\n" "scale=s"
6865"\n" "ibase=b"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006866"\n" "if(n)return(1/r)"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006867"\n" "return(r/1)"
6868"\n" "}"
6869"\n" "define l(x){"
6870"\n" "auto b,s,r,p,a,q,i,v"
6871"\n" "b=ibase"
6872"\n" "ibase=A"
6873"\n" "if(x<=0){"
6874"\n" "r=(1-10^scale)/1"
6875"\n" "ibase=b"
6876"\n" "return(r)"
6877"\n" "}"
6878"\n" "s=scale"
6879"\n" "scale+=6"
6880"\n" "p=2"
6881"\n" "while(x>=2){"
6882"\n" "p*=2"
6883"\n" "x=sqrt(x)"
6884"\n" "}"
Denys Vlasenko146a79d2018-12-16 21:46:11 +01006885"\n" "while(x<=.5){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006886"\n" "p*=2"
6887"\n" "x=sqrt(x)"
6888"\n" "}"
6889"\n" "r=a=(x-1)/(x+1)"
6890"\n" "q=a*a"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006891"\n" "v=1"
6892"\n" "for(i=3;v;i+=2){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006893"\n" "a*=q"
6894"\n" "v=a/i"
6895"\n" "r+=v"
6896"\n" "}"
6897"\n" "r*=p"
6898"\n" "scale=s"
6899"\n" "ibase=b"
6900"\n" "return(r/1)"
6901"\n" "}"
6902"\n" "define s(x){"
Denys Vlasenko240d7ee2018-12-14 11:27:09 +01006903"\n" "auto b,s,r,a,q,i"
6904"\n" "if(x<0)return(-s(-x))"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006905"\n" "b=ibase"
6906"\n" "ibase=A"
6907"\n" "s=scale"
6908"\n" "scale=1.1*s+2"
6909"\n" "a=a(1)"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006910"\n" "scale=0"
6911"\n" "q=(x/a+2)/4"
Denys Vlasenko203210e2018-12-14 09:53:50 +01006912"\n" "x-=4*q*a"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006913"\n" "if(q%2)x=-x"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006914"\n" "scale=s+2"
6915"\n" "r=a=x"
6916"\n" "q=-x*x"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006917"\n" "for(i=3;a;i+=2){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006918"\n" "a*=q/(i*(i-1))"
6919"\n" "r+=a"
6920"\n" "}"
6921"\n" "scale=s"
6922"\n" "ibase=b"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006923"\n" "return(r/1)"
6924"\n" "}"
6925"\n" "define c(x){"
6926"\n" "auto b,s"
6927"\n" "b=ibase"
6928"\n" "ibase=A"
6929"\n" "s=scale"
6930"\n" "scale*=1.2"
6931"\n" "x=s(2*a(1)+x)"
6932"\n" "scale=s"
6933"\n" "ibase=b"
6934"\n" "return(x/1)"
6935"\n" "}"
6936"\n" "define a(x){"
6937"\n" "auto b,s,r,n,a,m,t,f,i,u"
6938"\n" "b=ibase"
6939"\n" "ibase=A"
6940"\n" "n=1"
6941"\n" "if(x<0){"
6942"\n" "n=-1"
6943"\n" "x=-x"
6944"\n" "}"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006945"\n" "if(scale<65){"
6946"\n" "if(x==1)return(.7853981633974483096156608458198757210492923498437764552437361480/n)"
6947"\n" "if(x==.2)return(.1973955598498807583700497651947902934475851037878521015176889402/n)"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006948"\n" "}"
6949"\n" "s=scale"
6950"\n" "if(x>.2){"
6951"\n" "scale+=5"
6952"\n" "a=a(.2)"
6953"\n" "}"
6954"\n" "scale=s+3"
6955"\n" "while(x>.2){"
6956"\n" "m+=1"
6957"\n" "x=(x-.2)/(1+.2*x)"
6958"\n" "}"
6959"\n" "r=u=x"
6960"\n" "f=-x*x"
6961"\n" "t=1"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006962"\n" "for(i=3;t;i+=2){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006963"\n" "u*=f"
6964"\n" "t=u/i"
6965"\n" "r+=t"
6966"\n" "}"
6967"\n" "scale=s"
6968"\n" "ibase=b"
6969"\n" "return((m*a+r)/n)"
6970"\n" "}"
6971"\n" "define j(n,x){"
6972"\n" "auto b,s,o,a,i,v,f"
6973"\n" "b=ibase"
6974"\n" "ibase=A"
6975"\n" "s=scale"
6976"\n" "scale=0"
6977"\n" "n/=1"
6978"\n" "if(n<0){"
6979"\n" "n=-n"
Denys Vlasenko203210e2018-12-14 09:53:50 +01006980"\n" "o=n%2"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006981"\n" "}"
6982"\n" "a=1"
6983"\n" "for(i=2;i<=n;++i)a*=i"
6984"\n" "scale=1.5*s"
6985"\n" "a=(x^n)/2^n/a"
6986"\n" "r=v=1"
6987"\n" "f=-x*x/4"
Denys Vlasenkoc06537d2018-12-14 10:10:37 +01006988"\n" "scale+=length(a)-scale(a)"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006989"\n" "for(i=1;v;++i){"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006990"\n" "v=v*f/i/(n+i)"
6991"\n" "r+=v"
6992"\n" "}"
6993"\n" "scale=s"
6994"\n" "ibase=b"
Denys Vlasenko3ac0c212018-12-14 01:01:01 +01006995"\n" "if(o)a=-a"
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01006996"\n" "return(a*r/1)"
6997"\n" "}"
6998};
6999#endif // ENABLE_BC
7000
Denys Vlasenko19f11072018-12-12 22:48:19 +01007001static BC_STATUS zbc_vm_exec(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06007002{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007003 BcStatus s;
Gavin Howard01055ba2018-11-03 11:00:21 -06007004 size_t i;
7005
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007006#if ENABLE_BC
Denys Vlasenkod70d4a02018-12-04 20:58:40 +01007007 if (option_mask32 & BC_FLAG_L) {
Denys Vlasenko0ad36c42018-12-05 16:21:43 +01007008 // We know that internal library is not buggy,
7009 // thus error checking is normally disabled.
7010# define DEBUG_LIB 0
Denys Vlasenko0409ad32018-12-05 16:39:22 +01007011 bc_lex_file(&G.prs.l);
Denys Vlasenko2ea53a42018-12-14 17:51:17 +01007012 s = zbc_vm_process(bc_lib);
Denys Vlasenko19f11072018-12-12 22:48:19 +01007013 if (DEBUG_LIB && s) RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06007014 }
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007015#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06007016
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007017 s = BC_STATUS_SUCCESS;
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007018 for (i = 0; !s && i < G.files.len; ++i)
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01007019 s = zbc_vm_file(*((char **) bc_vec_item(&G.files, i)));
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007020 if (ENABLE_FEATURE_CLEAN_UP && s && !G_ttyin) {
7021 // Debug config, non-interactive mode:
7022 // return all the way back to main.
7023 // Non-debug builds do not come here, they exit.
Denys Vlasenko19f11072018-12-12 22:48:19 +01007024 RETURN_STATUS(s);
Denys Vlasenko9b70f192018-12-04 20:51:40 +01007025 }
Gavin Howard01055ba2018-11-03 11:00:21 -06007026
Denys Vlasenko91cde952018-12-10 20:56:08 +01007027 if (IS_BC || (option_mask32 & BC_FLAG_I))
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01007028 s = zbc_vm_execute_FILE(stdin, /*filename:*/ NULL);
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007029
Denys Vlasenko19f11072018-12-12 22:48:19 +01007030 RETURN_STATUS(s);
Gavin Howard01055ba2018-11-03 11:00:21 -06007031}
Denys Vlasenkoec603182018-12-17 10:34:02 +01007032#define zbc_vm_exec(...) (zbc_vm_exec(__VA_ARGS__) COMMA_SUCCESS)
Gavin Howard01055ba2018-11-03 11:00:21 -06007033
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007034#if ENABLE_FEATURE_CLEAN_UP
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01007035static void bc_program_free(void)
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007036{
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007037 bc_num_free(&G.prog.ob);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007038# if ENABLE_DC
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007039 bc_num_free(&G.prog.strmb);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007040# endif
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007041 bc_vec_free(&G.prog.fns);
7042 bc_vec_free(&G.prog.fn_map);
7043 bc_vec_free(&G.prog.vars);
7044 bc_vec_free(&G.prog.var_map);
7045 bc_vec_free(&G.prog.arrs);
7046 bc_vec_free(&G.prog.arr_map);
7047 bc_vec_free(&G.prog.strs);
7048 bc_vec_free(&G.prog.consts);
7049 bc_vec_free(&G.prog.results);
7050 bc_vec_free(&G.prog.stack);
7051 bc_num_free(&G.prog.last);
7052 bc_num_free(&G.prog.zero);
7053 bc_num_free(&G.prog.one);
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01007054 bc_vec_free(&G.input_buffer);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007055}
7056
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007057static void bc_vm_free(void)
Gavin Howard01055ba2018-11-03 11:00:21 -06007058{
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007059 bc_vec_free(&G.files);
Denys Vlasenkoa1d3ca22018-12-02 18:26:38 +01007060 bc_program_free();
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007061 bc_parse_free(&G.prs);
7062 free(G.env_args);
Gavin Howard01055ba2018-11-03 11:00:21 -06007063}
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007064#endif
7065
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007066static void bc_program_init(void)
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007067{
7068 size_t idx;
7069 BcInstPtr ip;
7070
Denys Vlasenko82269122018-12-14 16:30:56 +01007071 // memset(&G.prog, 0, sizeof(G.prog)); - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007072 memset(&ip, 0, sizeof(BcInstPtr));
7073
Denys Vlasenko82269122018-12-14 16:30:56 +01007074 // G.prog.nchars = G.prog.scale = 0; - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007075 G.prog.ib_t = 10;
7076
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007077 bc_num_init_DEF_SIZE(&G.prog.ob);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007078 bc_num_ten(&G.prog.ob);
7079 G.prog.ob_t = 10;
7080
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007081#if ENABLE_DC
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007082 bc_num_init_DEF_SIZE(&G.prog.strmb);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007083 bc_num_ulong2num(&G.prog.strmb, UCHAR_MAX + 1);
7084#endif
7085
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007086 bc_num_init_DEF_SIZE(&G.prog.last);
Denys Vlasenko3129f702018-12-09 12:04:44 +01007087 //bc_num_zero(&G.prog.last); - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007088
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007089 bc_num_init_DEF_SIZE(&G.prog.zero);
Denys Vlasenko3129f702018-12-09 12:04:44 +01007090 //bc_num_zero(&G.prog.zero); - already is
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007091
Denys Vlasenkoe20e00d2018-12-09 11:44:20 +01007092 bc_num_init_DEF_SIZE(&G.prog.one);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007093 bc_num_one(&G.prog.one);
7094
7095 bc_vec_init(&G.prog.fns, sizeof(BcFunc), bc_func_free);
Denys Vlasenkocb9a99f2018-12-04 21:54:33 +01007096 bc_vec_init(&G.prog.fn_map, sizeof(BcId), bc_id_free);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007097
Denys Vlasenko1f67e932018-12-03 00:08:59 +01007098 bc_program_addFunc(xstrdup("(main)"), &idx);
7099 bc_program_addFunc(xstrdup("(read)"), &idx);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007100
7101 bc_vec_init(&G.prog.vars, sizeof(BcVec), bc_vec_free);
Denys Vlasenkocb9a99f2018-12-04 21:54:33 +01007102 bc_vec_init(&G.prog.var_map, sizeof(BcId), bc_id_free);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007103
7104 bc_vec_init(&G.prog.arrs, sizeof(BcVec), bc_vec_free);
Denys Vlasenkocb9a99f2018-12-04 21:54:33 +01007105 bc_vec_init(&G.prog.arr_map, sizeof(BcId), bc_id_free);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007106
7107 bc_vec_init(&G.prog.strs, sizeof(char *), bc_string_free);
7108 bc_vec_init(&G.prog.consts, sizeof(char *), bc_string_free);
7109 bc_vec_init(&G.prog.results, sizeof(BcResult), bc_result_free);
7110 bc_vec_init(&G.prog.stack, sizeof(BcInstPtr), NULL);
7111 bc_vec_push(&G.prog.stack, &ip);
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01007112
Denys Vlasenkoe4ba4c42018-12-17 09:51:43 +01007113 bc_char_vec_init(&G.input_buffer);
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007114}
Gavin Howard01055ba2018-11-03 11:00:21 -06007115
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007116static int bc_vm_init(const char *env_len)
Gavin Howard01055ba2018-11-03 11:00:21 -06007117{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007118#if ENABLE_FEATURE_EDITING
7119 G.line_input_state = new_line_input_t(DO_HISTORY);
7120#endif
7121 G.prog.len = bc_vm_envLen(env_len);
7122
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007123 bc_vec_init(&G.files, sizeof(char *), NULL);
Denys Vlasenko5f263f42018-12-13 22:49:59 +01007124 IF_BC(if (IS_BC) bc_vm_envArgs();)
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007125 bc_program_init();
Denys Vlasenkoc2265f52018-12-12 23:10:08 +01007126 bc_parse_create(&G.prs, BC_PROG_MAIN);
Gavin Howard01055ba2018-11-03 11:00:21 -06007127
Denys Vlasenko89e785a2018-12-13 16:35:52 +01007128//TODO: in GNU bc, the check is (isatty(0) && isatty(1)),
7129//-i option unconditionally enables this regardless of isatty():
Denys Vlasenko1a6a4822018-12-06 09:20:32 +01007130 if (isatty(0)) {
Denys Vlasenkod38af482018-12-04 19:11:02 +01007131#if ENABLE_FEATURE_BC_SIGNALS
Denys Vlasenko1a6a4822018-12-06 09:20:32 +01007132 G_ttyin = 1;
Denys Vlasenko17c54722018-12-04 21:21:32 +01007133 // With SA_RESTART, most system calls will restart
7134 // (IOW: they won't fail with EINTR).
7135 // In particular, this means ^C won't cause
7136 // stdout to get into "error state" if SIGINT hits
7137 // within write() syscall.
Denys Vlasenko89e785a2018-12-13 16:35:52 +01007138 //
7139 // The downside is that ^C while tty input is taken
Denys Vlasenko17c54722018-12-04 21:21:32 +01007140 // will only be handled after [Enter] since read()
7141 // from stdin is not interrupted by ^C either,
7142 // it restarts, thus fgetc() does not return on ^C.
Denys Vlasenko89e785a2018-12-13 16:35:52 +01007143 // (This problem manifests only if line editing is disabled)
Denys Vlasenko17c54722018-12-04 21:21:32 +01007144 signal_SA_RESTART_empty_mask(SIGINT, record_signo);
7145
7146 // Without SA_RESTART, this exhibits a bug:
7147 // "while (1) print 1" and try ^C-ing it.
7148 // Intermittently, instead of returning to input line,
7149 // you'll get "output error: Interrupted system call"
7150 // and exit.
7151 //signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
Denys Vlasenkod38af482018-12-04 19:11:02 +01007152#endif
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007153 return 1; // "tty"
Denys Vlasenkod38af482018-12-04 19:11:02 +01007154 }
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007155 return 0; // "not a tty"
7156}
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007157
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007158static BcStatus bc_vm_run(void)
7159{
Denys Vlasenko19f11072018-12-12 22:48:19 +01007160 BcStatus st = zbc_vm_exec();
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007161#if ENABLE_FEATURE_CLEAN_UP
Denys Vlasenkoc7a7ce02018-12-06 23:06:57 +01007162 if (G_exiting) // it was actually "halt" or "quit"
7163 st = EXIT_SUCCESS;
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007164 bc_vm_free();
Denys Vlasenko95f93bd2018-12-06 10:29:12 +01007165# if ENABLE_FEATURE_EDITING
7166 free_line_input_t(G.line_input_state);
7167# endif
Denys Vlasenkoe873ff92018-12-06 00:29:22 +01007168 FREE_G();
Denys Vlasenko785e4b32018-12-02 17:18:52 +01007169#endif
Denys Vlasenkod1d29b42018-12-16 16:03:03 +01007170 dbg_exec("exiting with exitcode %d", st);
Gavin Howard01055ba2018-11-03 11:00:21 -06007171 return st;
7172}
7173
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007174#if ENABLE_BC
Denys Vlasenko5a9fef52018-12-02 14:35:32 +01007175int bc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007176int bc_main(int argc UNUSED_PARAM, char **argv)
Gavin Howard01055ba2018-11-03 11:00:21 -06007177{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007178 int is_tty;
7179
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007180 INIT_G();
Gavin Howard01055ba2018-11-03 11:00:21 -06007181
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007182 is_tty = bc_vm_init("BC_LINE_LENGTH");
7183
7184 bc_args(argv);
7185
7186 if (is_tty && !(option_mask32 & BC_FLAG_Q))
7187 bc_vm_info();
7188
7189 return bc_vm_run();
Gavin Howard01055ba2018-11-03 11:00:21 -06007190}
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007191#endif
Gavin Howard01055ba2018-11-03 11:00:21 -06007192
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007193#if ENABLE_DC
Denys Vlasenko5a9fef52018-12-02 14:35:32 +01007194int dc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denys Vlasenko1ff1c702018-12-06 00:46:09 +01007195int dc_main(int argc UNUSED_PARAM, char **argv)
Gavin Howard01055ba2018-11-03 11:00:21 -06007196{
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007197 int noscript;
7198
Denys Vlasenko6d9146a2018-12-02 15:48:37 +01007199 INIT_G();
Denys Vlasenko82269122018-12-14 16:30:56 +01007200
7201 // TODO: dc (GNU bc 1.07.1) 1.4.1 seems to use width
7202 // 1 char wider than bc from the same package.
7203 // Both default width, and xC_LINE_LENGTH=N are wider:
7204 // "DC_LINE_LENGTH=5 dc -e'123456 p'" prints:
Denys Vlasenko0a238142018-12-14 16:48:34 +01007205 // |1234\ |
7206 // |56 |
Denys Vlasenko82269122018-12-14 16:30:56 +01007207 // "echo '123456' | BC_LINE_LENGTH=5 bc" prints:
Denys Vlasenko0a238142018-12-14 16:48:34 +01007208 // |123\ |
7209 // |456 |
Denys Vlasenko82269122018-12-14 16:30:56 +01007210 // Do the same, or it's a bug?
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007211 bc_vm_init("DC_LINE_LENGTH");
Gavin Howard01055ba2018-11-03 11:00:21 -06007212
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007213 // Run -e'SCRIPT' and -fFILE in order of appearance, then handle FILEs
7214 noscript = BC_FLAG_I;
7215 for (;;) {
7216 int n = getopt(argc, argv, "e:f:x");
7217 if (n <= 0)
7218 break;
7219 switch (n) {
7220 case 'e':
7221 noscript = 0;
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01007222 n = zbc_vm_process(optarg);
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007223 if (n) return n;
7224 break;
7225 case 'f':
7226 noscript = 0;
Denys Vlasenkod6ad3662018-12-12 21:39:10 +01007227 n = zbc_vm_file(optarg);
7228 if (n) return n;
Denys Vlasenko6d0be102018-12-06 18:41:59 +01007229 break;
7230 case 'x':
7231 option_mask32 |= DC_FLAG_X;
7232 break;
7233 default:
7234 bb_show_usage();
7235 }
7236 }
7237 argv += optind;
7238
7239 while (*argv) {
7240 noscript = 0;
7241 bc_vec_push(&G.files, argv++);
7242 }
7243
7244 option_mask32 |= noscript; // set BC_FLAG_I if we need to interpret stdin
7245
7246 return bc_vm_run();
Gavin Howard01055ba2018-11-03 11:00:21 -06007247}
Denys Vlasenkoef869ec2018-12-02 18:49:16 +01007248#endif
Denys Vlasenko9ca9ef22018-12-06 11:31:14 +01007249
7250#endif // not DC_SMALL