Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * awk implementation for busybox |
| 4 | * |
| 5 | * Copyright (C) 2002 by Dmitry Zakharov <dmit@crp.bank.gov.ua> |
| 6 | * |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 7 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <unistd.h> |
| 13 | #include <errno.h> |
| 14 | #include <string.h> |
Bernhard Reutner-Fischer | a2a647d | 2006-05-19 12:30:00 +0000 | [diff] [blame] | 15 | #include <strings.h> |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 16 | #include <time.h> |
| 17 | #include <math.h> |
| 18 | #include <ctype.h> |
| 19 | #include <getopt.h> |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 20 | |
"Vladimir N. Oleynik" | 23f62fc | 2005-09-14 16:59:11 +0000 | [diff] [blame] | 21 | #include "xregex.h" |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 22 | #include "busybox.h" |
| 23 | |
| 24 | |
| 25 | #define MAXVARFMT 240 |
| 26 | #define MINNVBLOCK 64 |
| 27 | |
| 28 | /* variable flags */ |
| 29 | #define VF_NUMBER 0x0001 /* 1 = primary type is number */ |
| 30 | #define VF_ARRAY 0x0002 /* 1 = it's an array */ |
| 31 | |
| 32 | #define VF_CACHED 0x0100 /* 1 = num/str value has cached str/num eq */ |
| 33 | #define VF_USER 0x0200 /* 1 = user input (may be numeric string) */ |
| 34 | #define VF_SPECIAL 0x0400 /* 1 = requires extra handling when changed */ |
| 35 | #define VF_WALK 0x0800 /* 1 = variable has alloc'd x.walker list */ |
| 36 | #define VF_FSTR 0x1000 /* 1 = string points to fstring buffer */ |
| 37 | #define VF_CHILD 0x2000 /* 1 = function arg; x.parent points to source */ |
| 38 | #define VF_DIRTY 0x4000 /* 1 = variable was set explicitly */ |
| 39 | |
| 40 | /* these flags are static, don't change them when value is changed */ |
| 41 | #define VF_DONTTOUCH (VF_ARRAY | VF_SPECIAL | VF_WALK | VF_CHILD | VF_DIRTY) |
| 42 | |
| 43 | /* Variable */ |
| 44 | typedef struct var_s { |
| 45 | unsigned short type; /* flags */ |
| 46 | double number; |
| 47 | char *string; |
| 48 | union { |
Mike Frysinger | 4b7b8a5 | 2006-04-16 05:55:15 +0000 | [diff] [blame] | 49 | int aidx; /* func arg idx (for compilation stage) */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 50 | struct xhash_s *array; /* array ptr */ |
| 51 | struct var_s *parent; /* for func args, ptr to actual parameter */ |
| 52 | char **walker; /* list of array elements (for..in) */ |
| 53 | } x; |
| 54 | } var; |
| 55 | |
| 56 | /* Node chain (pattern-action chain, BEGIN, END, function bodies) */ |
| 57 | typedef struct chain_s { |
| 58 | struct node_s *first; |
| 59 | struct node_s *last; |
| 60 | char *programname; |
| 61 | } chain; |
| 62 | |
| 63 | /* Function */ |
| 64 | typedef struct func_s { |
| 65 | unsigned short nargs; |
| 66 | struct chain_s body; |
| 67 | } func; |
| 68 | |
| 69 | /* I/O stream */ |
| 70 | typedef struct rstream_s { |
| 71 | FILE *F; |
| 72 | char *buffer; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 73 | int adv; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 74 | int size; |
| 75 | int pos; |
| 76 | unsigned short is_pipe; |
| 77 | } rstream; |
| 78 | |
| 79 | typedef struct hash_item_s { |
| 80 | union { |
| 81 | struct var_s v; /* variable/array hash */ |
| 82 | struct rstream_s rs; /* redirect streams hash */ |
| 83 | struct func_s f; /* functions hash */ |
| 84 | } data; |
| 85 | struct hash_item_s *next; /* next in chain */ |
| 86 | char name[1]; /* really it's longer */ |
| 87 | } hash_item; |
| 88 | |
| 89 | typedef struct xhash_s { |
| 90 | unsigned int nel; /* num of elements */ |
| 91 | unsigned int csize; /* current hash size */ |
| 92 | unsigned int nprime; /* next hash size in PRIMES[] */ |
| 93 | unsigned int glen; /* summary length of item names */ |
| 94 | struct hash_item_s **items; |
| 95 | } xhash; |
| 96 | |
| 97 | /* Tree node */ |
| 98 | typedef struct node_s { |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 99 | uint32_t info; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 100 | unsigned short lineno; |
| 101 | union { |
| 102 | struct node_s *n; |
| 103 | var *v; |
| 104 | int i; |
| 105 | char *s; |
| 106 | regex_t *re; |
| 107 | } l; |
| 108 | union { |
| 109 | struct node_s *n; |
| 110 | regex_t *ire; |
| 111 | func *f; |
| 112 | int argno; |
| 113 | } r; |
| 114 | union { |
| 115 | struct node_s *n; |
| 116 | } a; |
| 117 | } node; |
| 118 | |
| 119 | /* Block of temporary variables */ |
| 120 | typedef struct nvblock_s { |
| 121 | int size; |
| 122 | var *pos; |
| 123 | struct nvblock_s *prev; |
| 124 | struct nvblock_s *next; |
| 125 | var nv[0]; |
| 126 | } nvblock; |
| 127 | |
| 128 | typedef struct tsplitter_s { |
| 129 | node n; |
| 130 | regex_t re[2]; |
| 131 | } tsplitter; |
| 132 | |
| 133 | /* simple token classes */ |
| 134 | /* Order and hex values are very important!!! See next_token() */ |
| 135 | #define TC_SEQSTART 1 /* ( */ |
| 136 | #define TC_SEQTERM (1 << 1) /* ) */ |
| 137 | #define TC_REGEXP (1 << 2) /* /.../ */ |
| 138 | #define TC_OUTRDR (1 << 3) /* | > >> */ |
| 139 | #define TC_UOPPOST (1 << 4) /* unary postfix operator */ |
| 140 | #define TC_UOPPRE1 (1 << 5) /* unary prefix operator */ |
| 141 | #define TC_BINOPX (1 << 6) /* two-opnd operator */ |
| 142 | #define TC_IN (1 << 7) |
| 143 | #define TC_COMMA (1 << 8) |
| 144 | #define TC_PIPE (1 << 9) /* input redirection pipe */ |
| 145 | #define TC_UOPPRE2 (1 << 10) /* unary prefix operator */ |
| 146 | #define TC_ARRTERM (1 << 11) /* ] */ |
| 147 | #define TC_GRPSTART (1 << 12) /* { */ |
| 148 | #define TC_GRPTERM (1 << 13) /* } */ |
| 149 | #define TC_SEMICOL (1 << 14) |
| 150 | #define TC_NEWLINE (1 << 15) |
| 151 | #define TC_STATX (1 << 16) /* ctl statement (for, next...) */ |
| 152 | #define TC_WHILE (1 << 17) |
| 153 | #define TC_ELSE (1 << 18) |
| 154 | #define TC_BUILTIN (1 << 19) |
| 155 | #define TC_GETLINE (1 << 20) |
| 156 | #define TC_FUNCDECL (1 << 21) /* `function' `func' */ |
| 157 | #define TC_BEGIN (1 << 22) |
| 158 | #define TC_END (1 << 23) |
| 159 | #define TC_EOF (1 << 24) |
| 160 | #define TC_VARIABLE (1 << 25) |
| 161 | #define TC_ARRAY (1 << 26) |
| 162 | #define TC_FUNCTION (1 << 27) |
| 163 | #define TC_STRING (1 << 28) |
| 164 | #define TC_NUMBER (1 << 29) |
| 165 | |
| 166 | #define TC_UOPPRE (TC_UOPPRE1 | TC_UOPPRE2) |
| 167 | |
| 168 | /* combined token classes */ |
| 169 | #define TC_BINOP (TC_BINOPX | TC_COMMA | TC_PIPE | TC_IN) |
| 170 | #define TC_UNARYOP (TC_UOPPRE | TC_UOPPOST) |
| 171 | #define TC_OPERAND (TC_VARIABLE | TC_ARRAY | TC_FUNCTION | \ |
| 172 | TC_BUILTIN | TC_GETLINE | TC_SEQSTART | TC_STRING | TC_NUMBER) |
| 173 | |
| 174 | #define TC_STATEMNT (TC_STATX | TC_WHILE) |
| 175 | #define TC_OPTERM (TC_SEMICOL | TC_NEWLINE) |
| 176 | |
| 177 | /* word tokens, cannot mean something else if not expected */ |
| 178 | #define TC_WORD (TC_IN | TC_STATEMNT | TC_ELSE | TC_BUILTIN | \ |
| 179 | TC_GETLINE | TC_FUNCDECL | TC_BEGIN | TC_END) |
| 180 | |
| 181 | /* discard newlines after these */ |
| 182 | #define TC_NOTERM (TC_COMMA | TC_GRPSTART | TC_GRPTERM | \ |
| 183 | TC_BINOP | TC_OPTERM) |
| 184 | |
| 185 | /* what can expression begin with */ |
| 186 | #define TC_OPSEQ (TC_OPERAND | TC_UOPPRE | TC_REGEXP) |
| 187 | /* what can group begin with */ |
| 188 | #define TC_GRPSEQ (TC_OPSEQ | TC_OPTERM | TC_STATEMNT | TC_GRPSTART) |
| 189 | |
| 190 | /* if previous token class is CONCAT1 and next is CONCAT2, concatenation */ |
| 191 | /* operator is inserted between them */ |
| 192 | #define TC_CONCAT1 (TC_VARIABLE | TC_ARRTERM | TC_SEQTERM | \ |
| 193 | TC_STRING | TC_NUMBER | TC_UOPPOST) |
| 194 | #define TC_CONCAT2 (TC_OPERAND | TC_UOPPRE) |
| 195 | |
| 196 | #define OF_RES1 0x010000 |
| 197 | #define OF_RES2 0x020000 |
| 198 | #define OF_STR1 0x040000 |
| 199 | #define OF_STR2 0x080000 |
| 200 | #define OF_NUM1 0x100000 |
| 201 | #define OF_CHECKED 0x200000 |
| 202 | |
| 203 | /* combined operator flags */ |
| 204 | #define xx 0 |
| 205 | #define xV OF_RES2 |
| 206 | #define xS (OF_RES2 | OF_STR2) |
| 207 | #define Vx OF_RES1 |
| 208 | #define VV (OF_RES1 | OF_RES2) |
| 209 | #define Nx (OF_RES1 | OF_NUM1) |
| 210 | #define NV (OF_RES1 | OF_NUM1 | OF_RES2) |
| 211 | #define Sx (OF_RES1 | OF_STR1) |
| 212 | #define SV (OF_RES1 | OF_STR1 | OF_RES2) |
| 213 | #define SS (OF_RES1 | OF_STR1 | OF_RES2 | OF_STR2) |
| 214 | |
| 215 | #define OPCLSMASK 0xFF00 |
| 216 | #define OPNMASK 0x007F |
| 217 | |
| 218 | /* operator priority is a highest byte (even: r->l, odd: l->r grouping) |
| 219 | * For builtins it has different meaning: n n s3 s2 s1 v3 v2 v1, |
| 220 | * n - min. number of args, vN - resolve Nth arg to var, sN - resolve to string |
| 221 | */ |
| 222 | #define P(x) (x << 24) |
| 223 | #define PRIMASK 0x7F000000 |
| 224 | #define PRIMASK2 0x7E000000 |
| 225 | |
| 226 | /* Operation classes */ |
| 227 | |
| 228 | #define SHIFT_TIL_THIS 0x0600 |
| 229 | #define RECUR_FROM_THIS 0x1000 |
| 230 | |
| 231 | enum { |
| 232 | OC_DELETE=0x0100, OC_EXEC=0x0200, OC_NEWSOURCE=0x0300, |
| 233 | OC_PRINT=0x0400, OC_PRINTF=0x0500, OC_WALKINIT=0x0600, |
| 234 | |
| 235 | OC_BR=0x0700, OC_BREAK=0x0800, OC_CONTINUE=0x0900, |
| 236 | OC_EXIT=0x0a00, OC_NEXT=0x0b00, OC_NEXTFILE=0x0c00, |
| 237 | OC_TEST=0x0d00, OC_WALKNEXT=0x0e00, |
| 238 | |
| 239 | OC_BINARY=0x1000, OC_BUILTIN=0x1100, OC_COLON=0x1200, |
| 240 | OC_COMMA=0x1300, OC_COMPARE=0x1400, OC_CONCAT=0x1500, |
| 241 | OC_FBLTIN=0x1600, OC_FIELD=0x1700, OC_FNARG=0x1800, |
| 242 | OC_FUNC=0x1900, OC_GETLINE=0x1a00, OC_IN=0x1b00, |
| 243 | OC_LAND=0x1c00, OC_LOR=0x1d00, OC_MATCH=0x1e00, |
| 244 | OC_MOVE=0x1f00, OC_PGETLINE=0x2000, OC_REGEXP=0x2100, |
| 245 | OC_REPLACE=0x2200, OC_RETURN=0x2300, OC_SPRINTF=0x2400, |
| 246 | OC_TERNARY=0x2500, OC_UNARY=0x2600, OC_VAR=0x2700, |
| 247 | OC_DONE=0x2800, |
| 248 | |
| 249 | ST_IF=0x3000, ST_DO=0x3100, ST_FOR=0x3200, |
| 250 | ST_WHILE=0x3300 |
| 251 | }; |
| 252 | |
| 253 | /* simple builtins */ |
| 254 | enum { |
| 255 | F_in=0, F_rn, F_co, F_ex, F_lg, F_si, F_sq, F_sr, |
| 256 | F_ti, F_le, F_sy, F_ff, F_cl |
| 257 | }; |
| 258 | |
| 259 | /* builtins */ |
| 260 | enum { |
| 261 | B_a2=0, B_ix, B_ma, B_sp, B_ss, B_ti, B_lo, B_up, |
| 262 | B_ge, B_gs, B_su |
| 263 | }; |
| 264 | |
| 265 | /* tokens and their corresponding info values */ |
| 266 | |
| 267 | #define NTC "\377" /* switch to next token class (tc<<1) */ |
| 268 | #define NTCC '\377' |
| 269 | |
| 270 | #define OC_B OC_BUILTIN |
| 271 | |
| 272 | static char * const tokenlist = |
| 273 | "\1(" NTC |
| 274 | "\1)" NTC |
| 275 | "\1/" NTC /* REGEXP */ |
| 276 | "\2>>" "\1>" "\1|" NTC /* OUTRDR */ |
| 277 | "\2++" "\2--" NTC /* UOPPOST */ |
| 278 | "\2++" "\2--" "\1$" NTC /* UOPPRE1 */ |
| 279 | "\2==" "\1=" "\2+=" "\2-=" /* BINOPX */ |
| 280 | "\2*=" "\2/=" "\2%=" "\2^=" |
| 281 | "\1+" "\1-" "\3**=" "\2**" |
| 282 | "\1/" "\1%" "\1^" "\1*" |
| 283 | "\2!=" "\2>=" "\2<=" "\1>" |
| 284 | "\1<" "\2!~" "\1~" "\2&&" |
| 285 | "\2||" "\1?" "\1:" NTC |
| 286 | "\2in" NTC |
| 287 | "\1," NTC |
| 288 | "\1|" NTC |
| 289 | "\1+" "\1-" "\1!" NTC /* UOPPRE2 */ |
| 290 | "\1]" NTC |
| 291 | "\1{" NTC |
| 292 | "\1}" NTC |
| 293 | "\1;" NTC |
| 294 | "\1\n" NTC |
| 295 | "\2if" "\2do" "\3for" "\5break" /* STATX */ |
| 296 | "\10continue" "\6delete" "\5print" |
| 297 | "\6printf" "\4next" "\10nextfile" |
| 298 | "\6return" "\4exit" NTC |
| 299 | "\5while" NTC |
| 300 | "\4else" NTC |
| 301 | |
| 302 | "\5close" "\6system" "\6fflush" "\5atan2" /* BUILTIN */ |
| 303 | "\3cos" "\3exp" "\3int" "\3log" |
| 304 | "\4rand" "\3sin" "\4sqrt" "\5srand" |
| 305 | "\6gensub" "\4gsub" "\5index" "\6length" |
| 306 | "\5match" "\5split" "\7sprintf" "\3sub" |
| 307 | "\6substr" "\7systime" "\10strftime" |
| 308 | "\7tolower" "\7toupper" NTC |
| 309 | "\7getline" NTC |
| 310 | "\4func" "\10function" NTC |
| 311 | "\5BEGIN" NTC |
| 312 | "\3END" "\0" |
| 313 | ; |
| 314 | |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 315 | static const uint32_t tokeninfo[] = { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 316 | |
| 317 | 0, |
| 318 | 0, |
| 319 | OC_REGEXP, |
| 320 | xS|'a', xS|'w', xS|'|', |
| 321 | OC_UNARY|xV|P(9)|'p', OC_UNARY|xV|P(9)|'m', |
| 322 | OC_UNARY|xV|P(9)|'P', OC_UNARY|xV|P(9)|'M', |
| 323 | OC_FIELD|xV|P(5), |
| 324 | OC_COMPARE|VV|P(39)|5, OC_MOVE|VV|P(74), |
| 325 | OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-', |
| 326 | OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', |
| 327 | OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&', |
| 328 | OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', |
| 329 | OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&', |
| 330 | OC_BINARY|NV|P(25)|'/', OC_BINARY|NV|P(25)|'%', |
| 331 | OC_BINARY|NV|P(15)|'&', OC_BINARY|NV|P(25)|'*', |
| 332 | OC_COMPARE|VV|P(39)|4, OC_COMPARE|VV|P(39)|3, |
| 333 | OC_COMPARE|VV|P(39)|0, OC_COMPARE|VV|P(39)|1, |
| 334 | OC_COMPARE|VV|P(39)|2, OC_MATCH|Sx|P(45)|'!', |
| 335 | OC_MATCH|Sx|P(45)|'~', OC_LAND|Vx|P(55), |
| 336 | OC_LOR|Vx|P(59), OC_TERNARY|Vx|P(64)|'?', |
| 337 | OC_COLON|xx|P(67)|':', |
| 338 | OC_IN|SV|P(49), |
| 339 | OC_COMMA|SS|P(80), |
| 340 | OC_PGETLINE|SV|P(37), |
| 341 | OC_UNARY|xV|P(19)|'+', OC_UNARY|xV|P(19)|'-', |
| 342 | OC_UNARY|xV|P(19)|'!', |
| 343 | 0, |
| 344 | 0, |
| 345 | 0, |
| 346 | 0, |
| 347 | 0, |
| 348 | ST_IF, ST_DO, ST_FOR, OC_BREAK, |
| 349 | OC_CONTINUE, OC_DELETE|Vx, OC_PRINT, |
| 350 | OC_PRINTF, OC_NEXT, OC_NEXTFILE, |
| 351 | OC_RETURN|Vx, OC_EXIT|Nx, |
| 352 | ST_WHILE, |
| 353 | 0, |
| 354 | |
| 355 | OC_FBLTIN|Sx|F_cl, OC_FBLTIN|Sx|F_sy, OC_FBLTIN|Sx|F_ff, OC_B|B_a2|P(0x83), |
| 356 | OC_FBLTIN|Nx|F_co, OC_FBLTIN|Nx|F_ex, OC_FBLTIN|Nx|F_in, OC_FBLTIN|Nx|F_lg, |
| 357 | OC_FBLTIN|F_rn, OC_FBLTIN|Nx|F_si, OC_FBLTIN|Nx|F_sq, OC_FBLTIN|Nx|F_sr, |
| 358 | OC_B|B_ge|P(0xd6), OC_B|B_gs|P(0xb6), OC_B|B_ix|P(0x9b), OC_FBLTIN|Sx|F_le, |
| 359 | OC_B|B_ma|P(0x89), OC_B|B_sp|P(0x8b), OC_SPRINTF, OC_B|B_su|P(0xb6), |
| 360 | OC_B|B_ss|P(0x8f), OC_FBLTIN|F_ti, OC_B|B_ti|P(0x0b), |
| 361 | OC_B|B_lo|P(0x49), OC_B|B_up|P(0x49), |
| 362 | OC_GETLINE|SV|P(0), |
| 363 | 0, 0, |
| 364 | 0, |
| 365 | 0 |
| 366 | }; |
| 367 | |
| 368 | /* internal variable names and their initial values */ |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 369 | /* asterisk marks SPECIAL vars; $ is just no-named Field0 */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 370 | enum { |
| 371 | CONVFMT=0, OFMT, FS, OFS, |
| 372 | ORS, RS, RT, FILENAME, |
| 373 | SUBSEP, ARGIND, ARGC, ARGV, |
| 374 | ERRNO, FNR, |
| 375 | NR, NF, IGNORECASE, |
| 376 | ENVIRON, F0, _intvarcount_ |
| 377 | }; |
| 378 | |
| 379 | static char * vNames = |
| 380 | "CONVFMT\0" "OFMT\0" "FS\0*" "OFS\0" |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 381 | "ORS\0" "RS\0*" "RT\0" "FILENAME\0" |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 382 | "SUBSEP\0" "ARGIND\0" "ARGC\0" "ARGV\0" |
| 383 | "ERRNO\0" "FNR\0" |
| 384 | "NR\0" "NF\0*" "IGNORECASE\0*" |
| 385 | "ENVIRON\0" "$\0*" "\0"; |
| 386 | |
| 387 | static char * vValues = |
| 388 | "%.6g\0" "%.6g\0" " \0" " \0" |
| 389 | "\n\0" "\n\0" "\0" "\0" |
| 390 | "\034\0" |
| 391 | "\377"; |
| 392 | |
| 393 | /* hash size may grow to these values */ |
| 394 | #define FIRST_PRIME 61; |
| 395 | static const unsigned int PRIMES[] = { 251, 1021, 4093, 16381, 65521 }; |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 396 | enum { NPRIMES = sizeof(PRIMES) / sizeof(unsigned int) }; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 397 | |
| 398 | /* globals */ |
| 399 | |
| 400 | extern char **environ; |
| 401 | |
| 402 | static var * V[_intvarcount_]; |
| 403 | static chain beginseq, mainseq, endseq, *seq; |
| 404 | static int nextrec, nextfile; |
| 405 | static node *break_ptr, *continue_ptr; |
| 406 | static rstream *iF; |
| 407 | static xhash *vhash, *ahash, *fdhash, *fnhash; |
| 408 | static char *programname; |
| 409 | static short lineno; |
| 410 | static int is_f0_split; |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 411 | static int nfields; |
| 412 | static var *Fields; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 413 | static tsplitter fsplitter, rsplitter; |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 414 | static nvblock *cb; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 415 | static char *pos; |
| 416 | static char *buf; |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 417 | static int icase; |
| 418 | static int exiting; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 419 | |
| 420 | static struct { |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 421 | uint32_t tclass; |
| 422 | uint32_t info; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 423 | char *string; |
| 424 | double number; |
| 425 | short lineno; |
| 426 | int rollback; |
| 427 | } t; |
| 428 | |
| 429 | /* function prototypes */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 430 | static void handle_special(var *); |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 431 | static node *parse_expr(uint32_t); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 432 | static void chain_group(void); |
| 433 | static var *evaluate(node *, var *); |
| 434 | static rstream *next_input_file(void); |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 435 | static int fmt_num(char *, int, const char *, double, int); |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 436 | static int awk_exit(int) ATTRIBUTE_NORETURN; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 437 | |
| 438 | /* ---- error handling ---- */ |
| 439 | |
| 440 | static const char EMSG_INTERNAL_ERROR[] = "Internal error"; |
| 441 | static const char EMSG_UNEXP_EOS[] = "Unexpected end of string"; |
| 442 | static const char EMSG_UNEXP_TOKEN[] = "Unexpected token"; |
| 443 | static const char EMSG_DIV_BY_ZERO[] = "Division by zero"; |
| 444 | static const char EMSG_INV_FMT[] = "Invalid format specifier"; |
| 445 | static const char EMSG_TOO_FEW_ARGS[] = "Too few arguments for builtin"; |
| 446 | static const char EMSG_NOT_ARRAY[] = "Not an array"; |
| 447 | static const char EMSG_POSSIBLE_ERROR[] = "Possible syntax error"; |
| 448 | static const char EMSG_UNDEF_FUNC[] = "Call to undefined function"; |
| 449 | #ifndef CONFIG_FEATURE_AWK_MATH |
| 450 | static const char EMSG_NO_MATH[] = "Math support is not compiled in"; |
| 451 | #endif |
| 452 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 453 | static void syntax_error(const char * const message) ATTRIBUTE_NORETURN; |
Glenn L McGrath | d4036f8 | 2002-11-28 09:30:40 +0000 | [diff] [blame] | 454 | static void syntax_error(const char * const message) |
| 455 | { |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 456 | bb_error_msg_and_die("%s:%i: %s", programname, lineno, message); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | #define runtime_error(x) syntax_error(x) |
| 460 | |
| 461 | |
| 462 | /* ---- hash stuff ---- */ |
| 463 | |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 464 | static unsigned int hashidx(const char *name) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 465 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 466 | register unsigned int idx=0; |
| 467 | |
| 468 | while (*name) idx = *name++ + (idx << 6) - idx; |
| 469 | return idx; |
| 470 | } |
| 471 | |
| 472 | /* create new hash */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 473 | static xhash *hash_init(void) |
| 474 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 475 | xhash *newhash; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 476 | |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 477 | newhash = (xhash *)xzalloc(sizeof(xhash)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 478 | newhash->csize = FIRST_PRIME; |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 479 | newhash->items = (hash_item **)xzalloc(newhash->csize * sizeof(hash_item *)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 480 | |
| 481 | return newhash; |
| 482 | } |
| 483 | |
| 484 | /* find item in hash, return ptr to data, NULL if not found */ |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 485 | static void *hash_search(xhash *hash, const char *name) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 486 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 487 | hash_item *hi; |
| 488 | |
| 489 | hi = hash->items [ hashidx(name) % hash->csize ]; |
| 490 | while (hi) { |
| 491 | if (strcmp(hi->name, name) == 0) |
| 492 | return &(hi->data); |
| 493 | hi = hi->next; |
| 494 | } |
| 495 | return NULL; |
| 496 | } |
| 497 | |
| 498 | /* grow hash if it becomes too big */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 499 | static void hash_rebuild(xhash *hash) |
| 500 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 501 | unsigned int newsize, i, idx; |
| 502 | hash_item **newitems, *hi, *thi; |
| 503 | |
| 504 | if (hash->nprime == NPRIMES) |
| 505 | return; |
| 506 | |
| 507 | newsize = PRIMES[hash->nprime++]; |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 508 | newitems = (hash_item **)xzalloc(newsize * sizeof(hash_item *)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 509 | |
| 510 | for (i=0; i<hash->csize; i++) { |
| 511 | hi = hash->items[i]; |
| 512 | while (hi) { |
| 513 | thi = hi; |
| 514 | hi = thi->next; |
| 515 | idx = hashidx(thi->name) % newsize; |
| 516 | thi->next = newitems[idx]; |
| 517 | newitems[idx] = thi; |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | free(hash->items); |
| 522 | hash->csize = newsize; |
| 523 | hash->items = newitems; |
| 524 | } |
| 525 | |
| 526 | /* find item in hash, add it if necessary. Return ptr to data */ |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 527 | static void *hash_find(xhash *hash, const char *name) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 528 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 529 | hash_item *hi; |
| 530 | unsigned int idx; |
| 531 | int l; |
| 532 | |
| 533 | hi = hash_search(hash, name); |
| 534 | if (! hi) { |
| 535 | if (++hash->nel / hash->csize > 10) |
| 536 | hash_rebuild(hash); |
| 537 | |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 538 | l = strlen(name) + 1; |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 539 | hi = xzalloc(sizeof(hash_item) + l); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 540 | memcpy(hi->name, name, l); |
| 541 | |
| 542 | idx = hashidx(name) % hash->csize; |
| 543 | hi->next = hash->items[idx]; |
| 544 | hash->items[idx] = hi; |
| 545 | hash->glen += l; |
| 546 | } |
| 547 | return &(hi->data); |
| 548 | } |
| 549 | |
| 550 | #define findvar(hash, name) (var *) hash_find ( (hash) , (name) ) |
| 551 | #define newvar(name) (var *) hash_find ( vhash , (name) ) |
| 552 | #define newfile(name) (rstream *) hash_find ( fdhash , (name) ) |
| 553 | #define newfunc(name) (func *) hash_find ( fnhash , (name) ) |
| 554 | |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 555 | static void hash_remove(xhash *hash, const char *name) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 556 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 557 | hash_item *hi, **phi; |
| 558 | |
| 559 | phi = &(hash->items[ hashidx(name) % hash->csize ]); |
| 560 | while (*phi) { |
| 561 | hi = *phi; |
| 562 | if (strcmp(hi->name, name) == 0) { |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 563 | hash->glen -= (strlen(name) + 1); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 564 | hash->nel--; |
| 565 | *phi = hi->next; |
| 566 | free(hi); |
| 567 | break; |
| 568 | } |
| 569 | phi = &(hi->next); |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | /* ------ some useful functions ------ */ |
| 574 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 575 | static void skip_spaces(char **s) |
| 576 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 577 | register char *p = *s; |
| 578 | |
| 579 | while(*p == ' ' || *p == '\t' || |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 580 | (*p == '\\' && *(p+1) == '\n' && (++p, ++t.lineno))) { |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 581 | p++; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 582 | } |
| 583 | *s = p; |
| 584 | } |
| 585 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 586 | static char *nextword(char **s) |
| 587 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 588 | register char *p = *s; |
| 589 | |
| 590 | while (*(*s)++) ; |
| 591 | |
| 592 | return p; |
| 593 | } |
| 594 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 595 | static char nextchar(char **s) |
| 596 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 597 | register char c, *pps; |
| 598 | |
| 599 | c = *((*s)++); |
| 600 | pps = *s; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 601 | if (c == '\\') c = bb_process_escape_sequence((const char**)s); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 602 | if (c == '\\' && *s == pps) c = *((*s)++); |
| 603 | return c; |
| 604 | } |
| 605 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 606 | static inline int isalnum_(int c) |
| 607 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 608 | return (isalnum(c) || c == '_'); |
| 609 | } |
| 610 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 611 | static FILE *afopen(const char *path, const char *mode) |
| 612 | { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 613 | return (*path == '-' && *(path+1) == '\0') ? stdin : bb_xfopen(path, mode); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | /* -------- working with variables (set/get/copy/etc) -------- */ |
| 617 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 618 | static xhash *iamarray(var *v) |
| 619 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 620 | var *a = v; |
| 621 | |
| 622 | while (a->type & VF_CHILD) |
| 623 | a = a->x.parent; |
| 624 | |
| 625 | if (! (a->type & VF_ARRAY)) { |
| 626 | a->type |= VF_ARRAY; |
| 627 | a->x.array = hash_init(); |
| 628 | } |
| 629 | return a->x.array; |
| 630 | } |
| 631 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 632 | static void clear_array(xhash *array) |
| 633 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 634 | unsigned int i; |
| 635 | hash_item *hi, *thi; |
| 636 | |
| 637 | for (i=0; i<array->csize; i++) { |
| 638 | hi = array->items[i]; |
| 639 | while (hi) { |
| 640 | thi = hi; |
| 641 | hi = hi->next; |
Aaron Lehmann | a170e1c | 2002-11-28 11:27:31 +0000 | [diff] [blame] | 642 | free(thi->data.v.string); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 643 | free(thi); |
| 644 | } |
| 645 | array->items[i] = NULL; |
| 646 | } |
| 647 | array->glen = array->nel = 0; |
| 648 | } |
| 649 | |
| 650 | /* clear a variable */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 651 | static var *clrvar(var *v) |
| 652 | { |
Aaron Lehmann | a170e1c | 2002-11-28 11:27:31 +0000 | [diff] [blame] | 653 | if (!(v->type & VF_FSTR)) |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 654 | free(v->string); |
| 655 | |
| 656 | v->type &= VF_DONTTOUCH; |
| 657 | v->type |= VF_DIRTY; |
| 658 | v->string = NULL; |
| 659 | return v; |
| 660 | } |
| 661 | |
| 662 | /* assign string value to variable */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 663 | static var *setvar_p(var *v, char *value) |
| 664 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 665 | clrvar(v); |
| 666 | v->string = value; |
| 667 | handle_special(v); |
| 668 | |
| 669 | return v; |
| 670 | } |
| 671 | |
| 672 | /* same as setvar_p but make a copy of string */ |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 673 | static var *setvar_s(var *v, const char *value) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 674 | { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 675 | return setvar_p(v, (value && *value) ? bb_xstrdup(value) : NULL); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | /* same as setvar_s but set USER flag */ |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 679 | static var *setvar_u(var *v, const char *value) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 680 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 681 | setvar_s(v, value); |
| 682 | v->type |= VF_USER; |
| 683 | return v; |
| 684 | } |
| 685 | |
| 686 | /* set array element to user string */ |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 687 | static void setari_u(var *a, int idx, const char *s) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 688 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 689 | register var *v; |
| 690 | static char sidx[12]; |
| 691 | |
| 692 | sprintf(sidx, "%d", idx); |
| 693 | v = findvar(iamarray(a), sidx); |
| 694 | setvar_u(v, s); |
| 695 | } |
| 696 | |
| 697 | /* assign numeric value to variable */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 698 | static var *setvar_i(var *v, double value) |
| 699 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 700 | clrvar(v); |
| 701 | v->type |= VF_NUMBER; |
| 702 | v->number = value; |
| 703 | handle_special(v); |
| 704 | return v; |
| 705 | } |
| 706 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 707 | static char *getvar_s(var *v) |
| 708 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 709 | /* if v is numeric and has no cached string, convert it to string */ |
| 710 | if ((v->type & (VF_NUMBER | VF_CACHED)) == VF_NUMBER) { |
| 711 | fmt_num(buf, MAXVARFMT, getvar_s(V[CONVFMT]), v->number, TRUE); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 712 | v->string = bb_xstrdup(buf); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 713 | v->type |= VF_CACHED; |
| 714 | } |
| 715 | return (v->string == NULL) ? "" : v->string; |
| 716 | } |
| 717 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 718 | static double getvar_i(var *v) |
| 719 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 720 | char *s; |
| 721 | |
| 722 | if ((v->type & (VF_NUMBER | VF_CACHED)) == 0) { |
| 723 | v->number = 0; |
| 724 | s = v->string; |
| 725 | if (s && *s) { |
| 726 | v->number = strtod(s, &s); |
| 727 | if (v->type & VF_USER) { |
| 728 | skip_spaces(&s); |
| 729 | if (*s != '\0') |
| 730 | v->type &= ~VF_USER; |
| 731 | } |
| 732 | } else { |
| 733 | v->type &= ~VF_USER; |
| 734 | } |
| 735 | v->type |= VF_CACHED; |
| 736 | } |
| 737 | return v->number; |
| 738 | } |
| 739 | |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 740 | static var *copyvar(var *dest, const var *src) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 741 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 742 | if (dest != src) { |
| 743 | clrvar(dest); |
| 744 | dest->type |= (src->type & ~VF_DONTTOUCH); |
| 745 | dest->number = src->number; |
| 746 | if (src->string) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 747 | dest->string = bb_xstrdup(src->string); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 748 | } |
| 749 | handle_special(dest); |
| 750 | return dest; |
| 751 | } |
| 752 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 753 | static var *incvar(var *v) |
| 754 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 755 | return setvar_i(v, getvar_i(v)+1.); |
| 756 | } |
| 757 | |
| 758 | /* return true if v is number or numeric string */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 759 | static int is_numeric(var *v) |
| 760 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 761 | getvar_i(v); |
| 762 | return ((v->type ^ VF_DIRTY) & (VF_NUMBER | VF_USER | VF_DIRTY)); |
| 763 | } |
| 764 | |
| 765 | /* return 1 when value of v corresponds to true, 0 otherwise */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 766 | static int istrue(var *v) |
| 767 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 768 | if (is_numeric(v)) |
| 769 | return (v->number == 0) ? 0 : 1; |
| 770 | else |
| 771 | return (v->string && *(v->string)) ? 1 : 0; |
| 772 | } |
| 773 | |
Eric Andersen | aff114c | 2004-04-14 17:51:38 +0000 | [diff] [blame] | 774 | /* temporary variables allocator. Last allocated should be first freed */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 775 | static var *nvalloc(int n) |
| 776 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 777 | nvblock *pb = NULL; |
| 778 | var *v, *r; |
| 779 | int size; |
| 780 | |
| 781 | while (cb) { |
| 782 | pb = cb; |
| 783 | if ((cb->pos - cb->nv) + n <= cb->size) break; |
| 784 | cb = cb->next; |
| 785 | } |
| 786 | |
| 787 | if (! cb) { |
| 788 | size = (n <= MINNVBLOCK) ? MINNVBLOCK : n; |
| 789 | cb = (nvblock *)xmalloc(sizeof(nvblock) + size * sizeof(var)); |
| 790 | cb->size = size; |
| 791 | cb->pos = cb->nv; |
| 792 | cb->prev = pb; |
| 793 | cb->next = NULL; |
| 794 | if (pb) pb->next = cb; |
| 795 | } |
| 796 | |
| 797 | v = r = cb->pos; |
| 798 | cb->pos += n; |
| 799 | |
| 800 | while (v < cb->pos) { |
| 801 | v->type = 0; |
| 802 | v->string = NULL; |
| 803 | v++; |
| 804 | } |
| 805 | |
| 806 | return r; |
| 807 | } |
| 808 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 809 | static void nvfree(var *v) |
| 810 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 811 | var *p; |
| 812 | |
| 813 | if (v < cb->nv || v >= cb->pos) |
| 814 | runtime_error(EMSG_INTERNAL_ERROR); |
| 815 | |
| 816 | for (p=v; p<cb->pos; p++) { |
| 817 | if ((p->type & (VF_ARRAY|VF_CHILD)) == VF_ARRAY) { |
| 818 | clear_array(iamarray(p)); |
| 819 | free(p->x.array->items); |
| 820 | free(p->x.array); |
| 821 | } |
| 822 | if (p->type & VF_WALK) |
| 823 | free(p->x.walker); |
| 824 | |
| 825 | clrvar(p); |
| 826 | } |
| 827 | |
| 828 | cb->pos = v; |
| 829 | while (cb->prev && cb->pos == cb->nv) { |
| 830 | cb = cb->prev; |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | /* ------- awk program text parsing ------- */ |
| 835 | |
| 836 | /* Parse next token pointed by global pos, place results into global t. |
| 837 | * If token isn't expected, give away. Return token class |
| 838 | */ |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 839 | static uint32_t next_token(uint32_t expected) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 840 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 841 | char *p, *pp, *s; |
| 842 | char *tl; |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 843 | uint32_t tc; |
| 844 | const uint32_t *ti; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 845 | int l; |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 846 | static int concat_inserted; |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 847 | static uint32_t save_tclass, save_info; |
| 848 | static uint32_t ltclass = TC_OPTERM; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 849 | |
| 850 | if (t.rollback) { |
| 851 | |
| 852 | t.rollback = FALSE; |
| 853 | |
| 854 | } else if (concat_inserted) { |
| 855 | |
| 856 | concat_inserted = FALSE; |
| 857 | t.tclass = save_tclass; |
| 858 | t.info = save_info; |
| 859 | |
| 860 | } else { |
| 861 | |
| 862 | p = pos; |
| 863 | |
| 864 | readnext: |
| 865 | skip_spaces(&p); |
| 866 | lineno = t.lineno; |
| 867 | if (*p == '#') |
| 868 | while (*p != '\n' && *p != '\0') p++; |
| 869 | |
| 870 | if (*p == '\n') |
| 871 | t.lineno++; |
| 872 | |
| 873 | if (*p == '\0') { |
| 874 | tc = TC_EOF; |
| 875 | |
| 876 | } else if (*p == '\"') { |
| 877 | /* it's a string */ |
| 878 | t.string = s = ++p; |
| 879 | while (*p != '\"') { |
| 880 | if (*p == '\0' || *p == '\n') |
| 881 | syntax_error(EMSG_UNEXP_EOS); |
| 882 | *(s++) = nextchar(&p); |
| 883 | } |
| 884 | p++; |
| 885 | *s = '\0'; |
| 886 | tc = TC_STRING; |
| 887 | |
| 888 | } else if ((expected & TC_REGEXP) && *p == '/') { |
| 889 | /* it's regexp */ |
| 890 | t.string = s = ++p; |
| 891 | while (*p != '/') { |
| 892 | if (*p == '\0' || *p == '\n') |
| 893 | syntax_error(EMSG_UNEXP_EOS); |
| 894 | if ((*s++ = *p++) == '\\') { |
| 895 | pp = p; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 896 | *(s-1) = bb_process_escape_sequence((const char **)&p); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 897 | if (*pp == '\\') *s++ = '\\'; |
| 898 | if (p == pp) *s++ = *p++; |
| 899 | } |
| 900 | } |
| 901 | p++; |
| 902 | *s = '\0'; |
| 903 | tc = TC_REGEXP; |
| 904 | |
| 905 | } else if (*p == '.' || isdigit(*p)) { |
| 906 | /* it's a number */ |
| 907 | t.number = strtod(p, &p); |
| 908 | if (*p == '.') |
| 909 | syntax_error(EMSG_UNEXP_TOKEN); |
| 910 | tc = TC_NUMBER; |
| 911 | |
| 912 | } else { |
| 913 | /* search for something known */ |
| 914 | tl = tokenlist; |
| 915 | tc = 0x00000001; |
| 916 | ti = tokeninfo; |
| 917 | while (*tl) { |
| 918 | l = *(tl++); |
| 919 | if (l == NTCC) { |
| 920 | tc <<= 1; |
| 921 | continue; |
| 922 | } |
| 923 | /* if token class is expected, token |
| 924 | * matches and it's not a longer word, |
| 925 | * then this is what we are looking for |
| 926 | */ |
| 927 | if ((tc & (expected | TC_WORD | TC_NEWLINE)) && |
| 928 | *tl == *p && strncmp(p, tl, l) == 0 && |
| 929 | !((tc & TC_WORD) && isalnum_(*(p + l)))) { |
| 930 | t.info = *ti; |
| 931 | p += l; |
| 932 | break; |
| 933 | } |
| 934 | ti++; |
| 935 | tl += l; |
| 936 | } |
| 937 | |
| 938 | if (! *tl) { |
| 939 | /* it's a name (var/array/function), |
| 940 | * otherwise it's something wrong |
| 941 | */ |
| 942 | if (! isalnum_(*p)) |
| 943 | syntax_error(EMSG_UNEXP_TOKEN); |
| 944 | |
| 945 | t.string = --p; |
| 946 | while(isalnum_(*(++p))) { |
| 947 | *(p-1) = *p; |
| 948 | } |
| 949 | *(p-1) = '\0'; |
| 950 | tc = TC_VARIABLE; |
Bernhard Reutner-Fischer | bb20462 | 2005-10-17 14:21:06 +0000 | [diff] [blame] | 951 | /* also consume whitespace between functionname and bracket */ |
Rob Landley | 46e351d | 2006-02-14 16:05:32 +0000 | [diff] [blame] | 952 | if (! (expected & TC_VARIABLE)) skip_spaces(&p); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 953 | if (*p == '(') { |
| 954 | tc = TC_FUNCTION; |
| 955 | } else { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 956 | if (*p == '[') { |
| 957 | p++; |
| 958 | tc = TC_ARRAY; |
| 959 | } |
| 960 | } |
| 961 | } |
| 962 | } |
| 963 | pos = p; |
| 964 | |
| 965 | /* skipping newlines in some cases */ |
| 966 | if ((ltclass & TC_NOTERM) && (tc & TC_NEWLINE)) |
| 967 | goto readnext; |
| 968 | |
| 969 | /* insert concatenation operator when needed */ |
| 970 | if ((ltclass&TC_CONCAT1) && (tc&TC_CONCAT2) && (expected&TC_BINOP)) { |
| 971 | concat_inserted = TRUE; |
| 972 | save_tclass = tc; |
| 973 | save_info = t.info; |
| 974 | tc = TC_BINOP; |
| 975 | t.info = OC_CONCAT | SS | P(35); |
| 976 | } |
| 977 | |
| 978 | t.tclass = tc; |
| 979 | } |
| 980 | ltclass = t.tclass; |
| 981 | |
| 982 | /* Are we ready for this? */ |
| 983 | if (! (ltclass & expected)) |
| 984 | syntax_error((ltclass & (TC_NEWLINE | TC_EOF)) ? |
| 985 | EMSG_UNEXP_EOS : EMSG_UNEXP_TOKEN); |
| 986 | |
| 987 | return ltclass; |
| 988 | } |
| 989 | |
| 990 | static void rollback_token(void) { t.rollback = TRUE; } |
| 991 | |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 992 | static node *new_node(uint32_t info) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 993 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 994 | register node *n; |
| 995 | |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 996 | n = (node *)xzalloc(sizeof(node)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 997 | n->info = info; |
| 998 | n->lineno = lineno; |
| 999 | return n; |
| 1000 | } |
| 1001 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1002 | static node *mk_re_node(char *s, node *n, regex_t *re) |
| 1003 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1004 | n->info = OC_REGEXP; |
| 1005 | n->l.re = re; |
| 1006 | n->r.ire = re + 1; |
| 1007 | xregcomp(re, s, REG_EXTENDED); |
| 1008 | xregcomp(re+1, s, REG_EXTENDED | REG_ICASE); |
| 1009 | |
| 1010 | return n; |
| 1011 | } |
| 1012 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1013 | static node *condition(void) |
| 1014 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1015 | next_token(TC_SEQSTART); |
| 1016 | return parse_expr(TC_SEQTERM); |
| 1017 | } |
| 1018 | |
| 1019 | /* parse expression terminated by given argument, return ptr |
| 1020 | * to built subtree. Terminator is eaten by parse_expr */ |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1021 | static node *parse_expr(uint32_t iexp) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1022 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1023 | node sn; |
| 1024 | node *cn = &sn; |
| 1025 | node *vn, *glptr; |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1026 | uint32_t tc, xtc; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1027 | var *v; |
| 1028 | |
| 1029 | sn.info = PRIMASK; |
| 1030 | sn.r.n = glptr = NULL; |
| 1031 | xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP | iexp; |
| 1032 | |
| 1033 | while (! ((tc = next_token(xtc)) & iexp)) { |
| 1034 | if (glptr && (t.info == (OC_COMPARE|VV|P(39)|2))) { |
| 1035 | /* input redirection (<) attached to glptr node */ |
| 1036 | cn = glptr->l.n = new_node(OC_CONCAT|SS|P(37)); |
Glenn L McGrath | 4bded58 | 2004-02-22 11:55:09 +0000 | [diff] [blame] | 1037 | cn->a.n = glptr; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1038 | xtc = TC_OPERAND | TC_UOPPRE; |
| 1039 | glptr = NULL; |
| 1040 | |
| 1041 | } else if (tc & (TC_BINOP | TC_UOPPOST)) { |
| 1042 | /* for binary and postfix-unary operators, jump back over |
| 1043 | * previous operators with higher priority */ |
| 1044 | vn = cn; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1045 | while ( ((t.info & PRIMASK) > (vn->a.n->info & PRIMASK2)) || |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1046 | ((t.info == vn->info) && ((t.info & OPCLSMASK) == OC_COLON)) ) |
| 1047 | vn = vn->a.n; |
| 1048 | if ((t.info & OPCLSMASK) == OC_TERNARY) |
| 1049 | t.info += P(6); |
| 1050 | cn = vn->a.n->r.n = new_node(t.info); |
| 1051 | cn->a.n = vn->a.n; |
| 1052 | if (tc & TC_BINOP) { |
| 1053 | cn->l.n = vn; |
| 1054 | xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP; |
| 1055 | if ((t.info & OPCLSMASK) == OC_PGETLINE) { |
| 1056 | /* it's a pipe */ |
| 1057 | next_token(TC_GETLINE); |
| 1058 | /* give maximum priority to this pipe */ |
| 1059 | cn->info &= ~PRIMASK; |
| 1060 | xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp; |
| 1061 | } |
| 1062 | } else { |
| 1063 | cn->r.n = vn; |
| 1064 | xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp; |
| 1065 | } |
| 1066 | vn->a.n = cn; |
| 1067 | |
| 1068 | } else { |
| 1069 | /* for operands and prefix-unary operators, attach them |
| 1070 | * to last node */ |
| 1071 | vn = cn; |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 1072 | cn = vn->r.n = new_node(t.info); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1073 | cn->a.n = vn; |
| 1074 | xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP; |
| 1075 | if (tc & (TC_OPERAND | TC_REGEXP)) { |
Rob Landley | ed830e8 | 2005-06-07 02:43:52 +0000 | [diff] [blame] | 1076 | xtc = TC_UOPPRE | TC_UOPPOST | TC_BINOP | TC_OPERAND | iexp; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1077 | /* one should be very careful with switch on tclass - |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1078 | * only simple tclasses should be used! */ |
| 1079 | switch (tc) { |
| 1080 | case TC_VARIABLE: |
| 1081 | case TC_ARRAY: |
| 1082 | cn->info = OC_VAR; |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 1083 | if ((v = hash_search(ahash, t.string)) != NULL) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1084 | cn->info = OC_FNARG; |
| 1085 | cn->l.i = v->x.aidx; |
| 1086 | } else { |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 1087 | cn->l.v = newvar(t.string); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1088 | } |
| 1089 | if (tc & TC_ARRAY) { |
| 1090 | cn->info |= xS; |
| 1091 | cn->r.n = parse_expr(TC_ARRTERM); |
| 1092 | } |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1093 | break; |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 1094 | |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1095 | case TC_NUMBER: |
| 1096 | case TC_STRING: |
| 1097 | cn->info = OC_VAR; |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 1098 | v = cn->l.v = xzalloc(sizeof(var)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1099 | if (tc & TC_NUMBER) |
| 1100 | setvar_i(v, t.number); |
| 1101 | else |
| 1102 | setvar_s(v, t.string); |
| 1103 | break; |
| 1104 | |
| 1105 | case TC_REGEXP: |
| 1106 | mk_re_node(t.string, cn, |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 1107 | (regex_t *)xzalloc(sizeof(regex_t)*2)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1108 | break; |
| 1109 | |
| 1110 | case TC_FUNCTION: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 1111 | cn->info = OC_FUNC; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1112 | cn->r.f = newfunc(t.string); |
| 1113 | cn->l.n = condition(); |
| 1114 | break; |
| 1115 | |
| 1116 | case TC_SEQSTART: |
| 1117 | cn = vn->r.n = parse_expr(TC_SEQTERM); |
| 1118 | cn->a.n = vn; |
| 1119 | break; |
| 1120 | |
| 1121 | case TC_GETLINE: |
| 1122 | glptr = cn; |
| 1123 | xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp; |
| 1124 | break; |
| 1125 | |
| 1126 | case TC_BUILTIN: |
| 1127 | cn->l.n = condition(); |
| 1128 | break; |
| 1129 | } |
| 1130 | } |
| 1131 | } |
| 1132 | } |
| 1133 | return sn.r.n; |
| 1134 | } |
| 1135 | |
| 1136 | /* add node to chain. Return ptr to alloc'd node */ |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1137 | static node *chain_node(uint32_t info) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1138 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1139 | register node *n; |
| 1140 | |
| 1141 | if (! seq->first) |
| 1142 | seq->first = seq->last = new_node(0); |
| 1143 | |
| 1144 | if (seq->programname != programname) { |
| 1145 | seq->programname = programname; |
| 1146 | n = chain_node(OC_NEWSOURCE); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1147 | n->l.s = bb_xstrdup(programname); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | n = seq->last; |
| 1151 | n->info = info; |
| 1152 | seq->last = n->a.n = new_node(OC_DONE); |
| 1153 | |
| 1154 | return n; |
| 1155 | } |
| 1156 | |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1157 | static void chain_expr(uint32_t info) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1158 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1159 | node *n; |
| 1160 | |
| 1161 | n = chain_node(info); |
| 1162 | n->l.n = parse_expr(TC_OPTERM | TC_GRPTERM); |
| 1163 | if (t.tclass & TC_GRPTERM) |
| 1164 | rollback_token(); |
| 1165 | } |
| 1166 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1167 | static node *chain_loop(node *nn) |
| 1168 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1169 | node *n, *n2, *save_brk, *save_cont; |
| 1170 | |
| 1171 | save_brk = break_ptr; |
| 1172 | save_cont = continue_ptr; |
| 1173 | |
| 1174 | n = chain_node(OC_BR | Vx); |
| 1175 | continue_ptr = new_node(OC_EXEC); |
| 1176 | break_ptr = new_node(OC_EXEC); |
| 1177 | chain_group(); |
| 1178 | n2 = chain_node(OC_EXEC | Vx); |
| 1179 | n2->l.n = nn; |
| 1180 | n2->a.n = n; |
| 1181 | continue_ptr->a.n = n2; |
| 1182 | break_ptr->a.n = n->r.n = seq->last; |
| 1183 | |
| 1184 | continue_ptr = save_cont; |
| 1185 | break_ptr = save_brk; |
| 1186 | |
| 1187 | return n; |
| 1188 | } |
| 1189 | |
| 1190 | /* parse group and attach it to chain */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1191 | static void chain_group(void) |
| 1192 | { |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1193 | uint32_t c; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1194 | node *n, *n2, *n3; |
| 1195 | |
| 1196 | do { |
| 1197 | c = next_token(TC_GRPSEQ); |
| 1198 | } while (c & TC_NEWLINE); |
| 1199 | |
| 1200 | if (c & TC_GRPSTART) { |
| 1201 | while(next_token(TC_GRPSEQ | TC_GRPTERM) != TC_GRPTERM) { |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 1202 | if (t.tclass & TC_NEWLINE) continue; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1203 | rollback_token(); |
| 1204 | chain_group(); |
| 1205 | } |
| 1206 | } else if (c & (TC_OPSEQ | TC_OPTERM)) { |
| 1207 | rollback_token(); |
| 1208 | chain_expr(OC_EXEC | Vx); |
| 1209 | } else { /* TC_STATEMNT */ |
| 1210 | switch (t.info & OPCLSMASK) { |
| 1211 | case ST_IF: |
| 1212 | n = chain_node(OC_BR | Vx); |
| 1213 | n->l.n = condition(); |
| 1214 | chain_group(); |
| 1215 | n2 = chain_node(OC_EXEC); |
| 1216 | n->r.n = seq->last; |
| 1217 | if (next_token(TC_GRPSEQ | TC_GRPTERM | TC_ELSE)==TC_ELSE) { |
| 1218 | chain_group(); |
| 1219 | n2->a.n = seq->last; |
| 1220 | } else { |
| 1221 | rollback_token(); |
| 1222 | } |
| 1223 | break; |
| 1224 | |
| 1225 | case ST_WHILE: |
| 1226 | n2 = condition(); |
| 1227 | n = chain_loop(NULL); |
| 1228 | n->l.n = n2; |
| 1229 | break; |
| 1230 | |
| 1231 | case ST_DO: |
| 1232 | n2 = chain_node(OC_EXEC); |
| 1233 | n = chain_loop(NULL); |
| 1234 | n2->a.n = n->a.n; |
| 1235 | next_token(TC_WHILE); |
| 1236 | n->l.n = condition(); |
| 1237 | break; |
| 1238 | |
| 1239 | case ST_FOR: |
| 1240 | next_token(TC_SEQSTART); |
| 1241 | n2 = parse_expr(TC_SEMICOL | TC_SEQTERM); |
| 1242 | if (t.tclass & TC_SEQTERM) { /* for-in */ |
| 1243 | if ((n2->info & OPCLSMASK) != OC_IN) |
| 1244 | syntax_error(EMSG_UNEXP_TOKEN); |
| 1245 | n = chain_node(OC_WALKINIT | VV); |
| 1246 | n->l.n = n2->l.n; |
| 1247 | n->r.n = n2->r.n; |
| 1248 | n = chain_loop(NULL); |
| 1249 | n->info = OC_WALKNEXT | Vx; |
| 1250 | n->l.n = n2->l.n; |
| 1251 | } else { /* for(;;) */ |
| 1252 | n = chain_node(OC_EXEC | Vx); |
| 1253 | n->l.n = n2; |
| 1254 | n2 = parse_expr(TC_SEMICOL); |
| 1255 | n3 = parse_expr(TC_SEQTERM); |
| 1256 | n = chain_loop(n3); |
| 1257 | n->l.n = n2; |
| 1258 | if (! n2) |
| 1259 | n->info = OC_EXEC; |
| 1260 | } |
| 1261 | break; |
| 1262 | |
| 1263 | case OC_PRINT: |
| 1264 | case OC_PRINTF: |
| 1265 | n = chain_node(t.info); |
| 1266 | n->l.n = parse_expr(TC_OPTERM | TC_OUTRDR | TC_GRPTERM); |
| 1267 | if (t.tclass & TC_OUTRDR) { |
| 1268 | n->info |= t.info; |
| 1269 | n->r.n = parse_expr(TC_OPTERM | TC_GRPTERM); |
| 1270 | } |
| 1271 | if (t.tclass & TC_GRPTERM) |
| 1272 | rollback_token(); |
| 1273 | break; |
| 1274 | |
| 1275 | case OC_BREAK: |
| 1276 | n = chain_node(OC_EXEC); |
| 1277 | n->a.n = break_ptr; |
| 1278 | break; |
| 1279 | |
| 1280 | case OC_CONTINUE: |
| 1281 | n = chain_node(OC_EXEC); |
| 1282 | n->a.n = continue_ptr; |
| 1283 | break; |
| 1284 | |
| 1285 | /* delete, next, nextfile, return, exit */ |
| 1286 | default: |
| 1287 | chain_expr(t.info); |
| 1288 | |
| 1289 | } |
| 1290 | } |
| 1291 | } |
| 1292 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1293 | static void parse_program(char *p) |
| 1294 | { |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1295 | uint32_t tclass; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1296 | node *cn; |
| 1297 | func *f; |
| 1298 | var *v; |
| 1299 | |
| 1300 | pos = p; |
| 1301 | t.lineno = 1; |
| 1302 | while((tclass = next_token(TC_EOF | TC_OPSEQ | TC_GRPSTART | |
| 1303 | TC_OPTERM | TC_BEGIN | TC_END | TC_FUNCDECL)) != TC_EOF) { |
| 1304 | |
| 1305 | if (tclass & TC_OPTERM) |
| 1306 | continue; |
| 1307 | |
| 1308 | seq = &mainseq; |
| 1309 | if (tclass & TC_BEGIN) { |
| 1310 | seq = &beginseq; |
| 1311 | chain_group(); |
| 1312 | |
| 1313 | } else if (tclass & TC_END) { |
| 1314 | seq = &endseq; |
| 1315 | chain_group(); |
| 1316 | |
| 1317 | } else if (tclass & TC_FUNCDECL) { |
| 1318 | next_token(TC_FUNCTION); |
| 1319 | pos++; |
| 1320 | f = newfunc(t.string); |
| 1321 | f->body.first = NULL; |
| 1322 | f->nargs = 0; |
| 1323 | while(next_token(TC_VARIABLE | TC_SEQTERM) & TC_VARIABLE) { |
| 1324 | v = findvar(ahash, t.string); |
| 1325 | v->x.aidx = (f->nargs)++; |
| 1326 | |
| 1327 | if (next_token(TC_COMMA | TC_SEQTERM) & TC_SEQTERM) |
| 1328 | break; |
| 1329 | } |
| 1330 | seq = &(f->body); |
| 1331 | chain_group(); |
| 1332 | clear_array(ahash); |
| 1333 | |
| 1334 | } else if (tclass & TC_OPSEQ) { |
| 1335 | rollback_token(); |
| 1336 | cn = chain_node(OC_TEST); |
| 1337 | cn->l.n = parse_expr(TC_OPTERM | TC_EOF | TC_GRPSTART); |
| 1338 | if (t.tclass & TC_GRPSTART) { |
| 1339 | rollback_token(); |
| 1340 | chain_group(); |
| 1341 | } else { |
| 1342 | chain_node(OC_PRINT); |
| 1343 | } |
| 1344 | cn->r.n = mainseq.last; |
| 1345 | |
| 1346 | } else /* if (tclass & TC_GRPSTART) */ { |
| 1347 | rollback_token(); |
| 1348 | chain_group(); |
| 1349 | } |
| 1350 | } |
| 1351 | } |
| 1352 | |
| 1353 | |
| 1354 | /* -------- program execution part -------- */ |
| 1355 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1356 | static node *mk_splitter(char *s, tsplitter *spl) |
| 1357 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1358 | register regex_t *re, *ire; |
| 1359 | node *n; |
| 1360 | |
| 1361 | re = &spl->re[0]; |
| 1362 | ire = &spl->re[1]; |
| 1363 | n = &spl->n; |
| 1364 | if ((n->info && OPCLSMASK) == OC_REGEXP) { |
| 1365 | regfree(re); |
| 1366 | regfree(ire); |
| 1367 | } |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1368 | if (strlen(s) > 1) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1369 | mk_re_node(s, n, re); |
| 1370 | } else { |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1371 | n->info = (uint32_t) *s; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1372 | } |
| 1373 | |
| 1374 | return n; |
| 1375 | } |
| 1376 | |
| 1377 | /* use node as a regular expression. Supplied with node ptr and regex_t |
Eric Andersen | aff114c | 2004-04-14 17:51:38 +0000 | [diff] [blame] | 1378 | * storage space. Return ptr to regex (if result points to preg, it should |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1379 | * be later regfree'd manually |
| 1380 | */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1381 | static regex_t *as_regex(node *op, regex_t *preg) |
| 1382 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1383 | var *v; |
| 1384 | char *s; |
| 1385 | |
| 1386 | if ((op->info & OPCLSMASK) == OC_REGEXP) { |
| 1387 | return icase ? op->r.ire : op->l.re; |
| 1388 | } else { |
| 1389 | v = nvalloc(1); |
| 1390 | s = getvar_s(evaluate(op, v)); |
| 1391 | xregcomp(preg, s, icase ? REG_EXTENDED | REG_ICASE : REG_EXTENDED); |
| 1392 | nvfree(v); |
| 1393 | return preg; |
| 1394 | } |
| 1395 | } |
| 1396 | |
| 1397 | /* gradually increasing buffer */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1398 | static void qrealloc(char **b, int n, int *size) |
| 1399 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1400 | if (! *b || n >= *size) |
| 1401 | *b = xrealloc(*b, *size = n + (n>>1) + 80); |
| 1402 | } |
| 1403 | |
| 1404 | /* resize field storage space */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1405 | static void fsrealloc(int size) |
| 1406 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1407 | static int maxfields = 0; |
| 1408 | int i; |
| 1409 | |
| 1410 | if (size >= maxfields) { |
| 1411 | i = maxfields; |
| 1412 | maxfields = size + 16; |
| 1413 | Fields = (var *)xrealloc(Fields, maxfields * sizeof(var)); |
| 1414 | for (; i<maxfields; i++) { |
| 1415 | Fields[i].type = VF_SPECIAL; |
| 1416 | Fields[i].string = NULL; |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | if (size < nfields) { |
| 1421 | for (i=size; i<nfields; i++) { |
| 1422 | clrvar(Fields+i); |
| 1423 | } |
| 1424 | } |
| 1425 | nfields = size; |
| 1426 | } |
| 1427 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1428 | static int awk_split(char *s, node *spl, char **slist) |
| 1429 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1430 | int l, n=0; |
| 1431 | char c[4]; |
| 1432 | char *s1; |
| 1433 | regmatch_t pmatch[2]; |
| 1434 | |
| 1435 | /* in worst case, each char would be a separate field */ |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1436 | *slist = s1 = bb_xstrndup(s, strlen(s) * 2 + 3); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1437 | |
| 1438 | c[0] = c[1] = (char)spl->info; |
| 1439 | c[2] = c[3] = '\0'; |
| 1440 | if (*getvar_s(V[RS]) == '\0') c[2] = '\n'; |
| 1441 | |
| 1442 | if ((spl->info & OPCLSMASK) == OC_REGEXP) { /* regex split */ |
| 1443 | while (*s) { |
| 1444 | l = strcspn(s, c+2); |
| 1445 | if (regexec(icase ? spl->r.ire : spl->l.re, s, 1, pmatch, 0) == 0 && |
| 1446 | pmatch[0].rm_so <= l) { |
| 1447 | l = pmatch[0].rm_so; |
| 1448 | if (pmatch[0].rm_eo == 0) { l++; pmatch[0].rm_eo++; } |
| 1449 | } else { |
| 1450 | pmatch[0].rm_eo = l; |
| 1451 | if (*(s+l)) pmatch[0].rm_eo++; |
| 1452 | } |
| 1453 | |
| 1454 | memcpy(s1, s, l); |
| 1455 | *(s1+l) = '\0'; |
| 1456 | nextword(&s1); |
| 1457 | s += pmatch[0].rm_eo; |
| 1458 | n++; |
| 1459 | } |
| 1460 | } else if (c[0] == '\0') { /* null split */ |
| 1461 | while(*s) { |
| 1462 | *(s1++) = *(s++); |
| 1463 | *(s1++) = '\0'; |
| 1464 | n++; |
| 1465 | } |
| 1466 | } else if (c[0] != ' ') { /* single-character split */ |
| 1467 | if (icase) { |
| 1468 | c[0] = toupper(c[0]); |
| 1469 | c[1] = tolower(c[1]); |
| 1470 | } |
| 1471 | if (*s1) n++; |
| 1472 | while ((s1 = strpbrk(s1, c))) { |
| 1473 | *(s1++) = '\0'; |
| 1474 | n++; |
| 1475 | } |
| 1476 | } else { /* space split */ |
| 1477 | while (*s) { |
| 1478 | while (isspace(*s)) s++; |
| 1479 | if (! *s) break; |
| 1480 | n++; |
| 1481 | while (*s && !isspace(*s)) |
| 1482 | *(s1++) = *(s++); |
| 1483 | *(s1++) = '\0'; |
| 1484 | } |
| 1485 | } |
| 1486 | return n; |
| 1487 | } |
| 1488 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1489 | static void split_f0(void) |
| 1490 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1491 | static char *fstrings = NULL; |
| 1492 | int i, n; |
| 1493 | char *s; |
| 1494 | |
| 1495 | if (is_f0_split) |
| 1496 | return; |
| 1497 | |
| 1498 | is_f0_split = TRUE; |
Aaron Lehmann | a170e1c | 2002-11-28 11:27:31 +0000 | [diff] [blame] | 1499 | free(fstrings); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1500 | fsrealloc(0); |
| 1501 | n = awk_split(getvar_s(V[F0]), &fsplitter.n, &fstrings); |
| 1502 | fsrealloc(n); |
| 1503 | s = fstrings; |
| 1504 | for (i=0; i<n; i++) { |
| 1505 | Fields[i].string = nextword(&s); |
| 1506 | Fields[i].type |= (VF_FSTR | VF_USER | VF_DIRTY); |
| 1507 | } |
| 1508 | |
| 1509 | /* set NF manually to avoid side effects */ |
| 1510 | clrvar(V[NF]); |
| 1511 | V[NF]->type = VF_NUMBER | VF_SPECIAL; |
| 1512 | V[NF]->number = nfields; |
| 1513 | } |
| 1514 | |
| 1515 | /* perform additional actions when some internal variables changed */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1516 | static void handle_special(var *v) |
| 1517 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1518 | int n; |
| 1519 | char *b, *sep, *s; |
| 1520 | int sl, l, len, i, bsize; |
| 1521 | |
| 1522 | if (! (v->type & VF_SPECIAL)) |
| 1523 | return; |
| 1524 | |
| 1525 | if (v == V[NF]) { |
| 1526 | n = (int)getvar_i(v); |
| 1527 | fsrealloc(n); |
| 1528 | |
| 1529 | /* recalculate $0 */ |
| 1530 | sep = getvar_s(V[OFS]); |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1531 | sl = strlen(sep); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1532 | b = NULL; |
| 1533 | len = 0; |
| 1534 | for (i=0; i<n; i++) { |
| 1535 | s = getvar_s(&Fields[i]); |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1536 | l = strlen(s); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1537 | if (b) { |
| 1538 | memcpy(b+len, sep, sl); |
| 1539 | len += sl; |
| 1540 | } |
| 1541 | qrealloc(&b, len+l+sl, &bsize); |
| 1542 | memcpy(b+len, s, l); |
| 1543 | len += l; |
| 1544 | } |
Glenn L McGrath | ca29ffc | 2004-09-24 09:24:27 +0000 | [diff] [blame] | 1545 | if (b) b[len] = '\0'; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1546 | setvar_p(V[F0], b); |
| 1547 | is_f0_split = TRUE; |
| 1548 | |
| 1549 | } else if (v == V[F0]) { |
| 1550 | is_f0_split = FALSE; |
| 1551 | |
| 1552 | } else if (v == V[FS]) { |
| 1553 | mk_splitter(getvar_s(v), &fsplitter); |
| 1554 | |
| 1555 | } else if (v == V[RS]) { |
| 1556 | mk_splitter(getvar_s(v), &rsplitter); |
| 1557 | |
| 1558 | } else if (v == V[IGNORECASE]) { |
| 1559 | icase = istrue(v); |
| 1560 | |
| 1561 | } else { /* $n */ |
| 1562 | n = getvar_i(V[NF]); |
| 1563 | setvar_i(V[NF], n > v-Fields ? n : v-Fields+1); |
| 1564 | /* right here v is invalid. Just to note... */ |
| 1565 | } |
| 1566 | } |
| 1567 | |
| 1568 | /* step through func/builtin/etc arguments */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1569 | static node *nextarg(node **pn) |
| 1570 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1571 | node *n; |
| 1572 | |
| 1573 | n = *pn; |
| 1574 | if (n && (n->info & OPCLSMASK) == OC_COMMA) { |
| 1575 | *pn = n->r.n; |
| 1576 | n = n->l.n; |
| 1577 | } else { |
| 1578 | *pn = NULL; |
| 1579 | } |
| 1580 | return n; |
| 1581 | } |
| 1582 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1583 | static void hashwalk_init(var *v, xhash *array) |
| 1584 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1585 | char **w; |
| 1586 | hash_item *hi; |
| 1587 | int i; |
| 1588 | |
| 1589 | if (v->type & VF_WALK) |
| 1590 | free(v->x.walker); |
| 1591 | |
| 1592 | v->type |= VF_WALK; |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 1593 | w = v->x.walker = (char **)xzalloc(2 + 2*sizeof(char *) + array->glen); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1594 | *w = *(w+1) = (char *)(w + 2); |
| 1595 | for (i=0; i<array->csize; i++) { |
| 1596 | hi = array->items[i]; |
| 1597 | while(hi) { |
| 1598 | strcpy(*w, hi->name); |
| 1599 | nextword(w); |
| 1600 | hi = hi->next; |
| 1601 | } |
| 1602 | } |
| 1603 | } |
| 1604 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1605 | static int hashwalk_next(var *v) |
| 1606 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1607 | char **w; |
| 1608 | |
| 1609 | w = v->x.walker; |
| 1610 | if (*(w+1) == *w) |
| 1611 | return FALSE; |
| 1612 | |
| 1613 | setvar_s(v, nextword(w+1)); |
| 1614 | return TRUE; |
| 1615 | } |
| 1616 | |
| 1617 | /* evaluate node, return 1 when result is true, 0 otherwise */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1618 | static int ptest(node *pattern) |
| 1619 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1620 | static var v; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1621 | return istrue(evaluate(pattern, &v)); |
| 1622 | } |
| 1623 | |
| 1624 | /* read next record from stream rsm into a variable v */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1625 | static int awk_getline(rstream *rsm, var *v) |
| 1626 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1627 | char *b; |
| 1628 | regmatch_t pmatch[2]; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1629 | int a, p, pp=0, size; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1630 | int fd, so, eo, r, rp; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1631 | char c, *m, *s; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1632 | |
| 1633 | /* we're using our own buffer since we need access to accumulating |
| 1634 | * characters |
| 1635 | */ |
| 1636 | fd = fileno(rsm->F); |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1637 | m = rsm->buffer; |
| 1638 | a = rsm->adv; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1639 | p = rsm->pos; |
| 1640 | size = rsm->size; |
| 1641 | c = (char) rsplitter.n.info; |
| 1642 | rp = 0; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1643 | |
| 1644 | if (! m) qrealloc(&m, 256, &size); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1645 | do { |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1646 | b = m + a; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1647 | so = eo = p; |
| 1648 | r = 1; |
| 1649 | if (p > 0) { |
| 1650 | if ((rsplitter.n.info & OPCLSMASK) == OC_REGEXP) { |
| 1651 | if (regexec(icase ? rsplitter.n.r.ire : rsplitter.n.l.re, |
| 1652 | b, 1, pmatch, 0) == 0) { |
| 1653 | so = pmatch[0].rm_so; |
| 1654 | eo = pmatch[0].rm_eo; |
| 1655 | if (b[eo] != '\0') |
| 1656 | break; |
| 1657 | } |
| 1658 | } else if (c != '\0') { |
| 1659 | s = strchr(b+pp, c); |
Rob Landley | 46e351d | 2006-02-14 16:05:32 +0000 | [diff] [blame] | 1660 | if (! s) s = memchr(b+pp, '\0', p - pp); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1661 | if (s) { |
| 1662 | so = eo = s-b; |
| 1663 | eo++; |
| 1664 | break; |
| 1665 | } |
| 1666 | } else { |
| 1667 | while (b[rp] == '\n') |
| 1668 | rp++; |
| 1669 | s = strstr(b+rp, "\n\n"); |
| 1670 | if (s) { |
| 1671 | so = eo = s-b; |
| 1672 | while (b[eo] == '\n') eo++; |
| 1673 | if (b[eo] != '\0') |
| 1674 | break; |
| 1675 | } |
| 1676 | } |
| 1677 | } |
| 1678 | |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1679 | if (a > 0) { |
| 1680 | memmove(m, (const void *)(m+a), p+1); |
| 1681 | b = m; |
| 1682 | a = 0; |
| 1683 | } |
| 1684 | |
| 1685 | qrealloc(&m, a+p+128, &size); |
| 1686 | b = m + a; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1687 | pp = p; |
| 1688 | p += safe_read(fd, b+p, size-p-1); |
| 1689 | if (p < pp) { |
| 1690 | p = 0; |
| 1691 | r = 0; |
| 1692 | setvar_i(V[ERRNO], errno); |
| 1693 | } |
| 1694 | b[p] = '\0'; |
| 1695 | |
| 1696 | } while (p > pp); |
| 1697 | |
| 1698 | if (p == 0) { |
| 1699 | r--; |
| 1700 | } else { |
| 1701 | c = b[so]; b[so] = '\0'; |
| 1702 | setvar_s(v, b+rp); |
| 1703 | v->type |= VF_USER; |
| 1704 | b[so] = c; |
| 1705 | c = b[eo]; b[eo] = '\0'; |
| 1706 | setvar_s(V[RT], b+so); |
| 1707 | b[eo] = c; |
| 1708 | } |
| 1709 | |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 1710 | rsm->buffer = m; |
| 1711 | rsm->adv = a + eo; |
| 1712 | rsm->pos = p - eo; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1713 | rsm->size = size; |
| 1714 | |
| 1715 | return r; |
| 1716 | } |
| 1717 | |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 1718 | static int fmt_num(char *b, int size, const char *format, double n, int int_as_int) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1719 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1720 | int r=0; |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 1721 | char c; |
| 1722 | const char *s=format; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1723 | |
| 1724 | if (int_as_int && n == (int)n) { |
| 1725 | r = snprintf(b, size, "%d", (int)n); |
| 1726 | } else { |
| 1727 | do { c = *s; } while (*s && *++s); |
| 1728 | if (strchr("diouxX", c)) { |
| 1729 | r = snprintf(b, size, format, (int)n); |
| 1730 | } else if (strchr("eEfgG", c)) { |
| 1731 | r = snprintf(b, size, format, n); |
| 1732 | } else { |
| 1733 | runtime_error(EMSG_INV_FMT); |
| 1734 | } |
| 1735 | } |
| 1736 | return r; |
| 1737 | } |
| 1738 | |
| 1739 | |
| 1740 | /* formatted output into an allocated buffer, return ptr to buffer */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1741 | static char *awk_printf(node *n) |
| 1742 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1743 | char *b = NULL; |
| 1744 | char *fmt, *s, *s1, *f; |
| 1745 | int i, j, incr, bsize; |
| 1746 | char c, c1; |
| 1747 | var *v, *arg; |
| 1748 | |
| 1749 | v = nvalloc(1); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1750 | fmt = f = bb_xstrdup(getvar_s(evaluate(nextarg(&n), v))); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1751 | |
| 1752 | i = 0; |
| 1753 | while (*f) { |
| 1754 | s = f; |
| 1755 | while (*f && (*f != '%' || *(++f) == '%')) |
| 1756 | f++; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1757 | while (*f && !isalpha(*f)) |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1758 | f++; |
| 1759 | |
| 1760 | incr = (f - s) + MAXVARFMT; |
| 1761 | qrealloc(&b, incr+i, &bsize); |
| 1762 | c = *f; if (c != '\0') f++; |
| 1763 | c1 = *f ; *f = '\0'; |
| 1764 | arg = evaluate(nextarg(&n), v); |
| 1765 | |
| 1766 | j = i; |
| 1767 | if (c == 'c' || !c) { |
| 1768 | i += sprintf(b+i, s, |
| 1769 | is_numeric(arg) ? (char)getvar_i(arg) : *getvar_s(arg)); |
| 1770 | |
| 1771 | } else if (c == 's') { |
| 1772 | s1 = getvar_s(arg); |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1773 | qrealloc(&b, incr+i+strlen(s1), &bsize); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1774 | i += sprintf(b+i, s, s1); |
| 1775 | |
| 1776 | } else { |
| 1777 | i += fmt_num(b+i, incr, s, getvar_i(arg), FALSE); |
| 1778 | } |
| 1779 | *f = c1; |
| 1780 | |
| 1781 | /* if there was an error while sprintf, return value is negative */ |
| 1782 | if (i < j) i = j; |
| 1783 | |
| 1784 | } |
| 1785 | |
| 1786 | b = xrealloc(b, i+1); |
| 1787 | free(fmt); |
| 1788 | nvfree(v); |
| 1789 | b[i] = '\0'; |
| 1790 | return b; |
| 1791 | } |
| 1792 | |
| 1793 | /* common substitution routine |
| 1794 | * replace (nm) substring of (src) that match (n) with (repl), store |
| 1795 | * result into (dest), return number of substitutions. If nm=0, replace |
| 1796 | * all matches. If src or dst is NULL, use $0. If ex=TRUE, enable |
| 1797 | * subexpression matching (\1-\9) |
| 1798 | */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1799 | static int awk_sub(node *rn, char *repl, int nm, var *src, var *dest, int ex) |
| 1800 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1801 | char *ds = NULL; |
| 1802 | char *sp, *s; |
| 1803 | int c, i, j, di, rl, so, eo, nbs, n, dssize; |
| 1804 | regmatch_t pmatch[10]; |
| 1805 | regex_t sreg, *re; |
| 1806 | |
| 1807 | re = as_regex(rn, &sreg); |
| 1808 | if (! src) src = V[F0]; |
| 1809 | if (! dest) dest = V[F0]; |
| 1810 | |
| 1811 | i = di = 0; |
| 1812 | sp = getvar_s(src); |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1813 | rl = strlen(repl); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1814 | while (regexec(re, sp, 10, pmatch, sp==getvar_s(src) ? 0:REG_NOTBOL) == 0) { |
| 1815 | so = pmatch[0].rm_so; |
| 1816 | eo = pmatch[0].rm_eo; |
| 1817 | |
| 1818 | qrealloc(&ds, di + eo + rl, &dssize); |
| 1819 | memcpy(ds + di, sp, eo); |
| 1820 | di += eo; |
| 1821 | if (++i >= nm) { |
| 1822 | /* replace */ |
| 1823 | di -= (eo - so); |
| 1824 | nbs = 0; |
| 1825 | for (s = repl; *s; s++) { |
| 1826 | ds[di++] = c = *s; |
| 1827 | if (c == '\\') { |
| 1828 | nbs++; |
| 1829 | continue; |
| 1830 | } |
| 1831 | if (c == '&' || (ex && c >= '0' && c <= '9')) { |
| 1832 | di -= ((nbs + 3) >> 1); |
| 1833 | j = 0; |
| 1834 | if (c != '&') { |
| 1835 | j = c - '0'; |
| 1836 | nbs++; |
| 1837 | } |
| 1838 | if (nbs % 2) { |
| 1839 | ds[di++] = c; |
| 1840 | } else { |
| 1841 | n = pmatch[j].rm_eo - pmatch[j].rm_so; |
| 1842 | qrealloc(&ds, di + rl + n, &dssize); |
| 1843 | memcpy(ds + di, sp + pmatch[j].rm_so, n); |
| 1844 | di += n; |
| 1845 | } |
| 1846 | } |
| 1847 | nbs = 0; |
| 1848 | } |
| 1849 | } |
| 1850 | |
| 1851 | sp += eo; |
| 1852 | if (i == nm) break; |
| 1853 | if (eo == so) { |
| 1854 | if (! (ds[di++] = *sp++)) break; |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | qrealloc(&ds, di + strlen(sp), &dssize); |
| 1859 | strcpy(ds + di, sp); |
| 1860 | setvar_p(dest, ds); |
| 1861 | if (re == &sreg) regfree(re); |
| 1862 | return i; |
| 1863 | } |
| 1864 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 1865 | static var *exec_builtin(node *op, var *res) |
| 1866 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1867 | int (*to_xxx)(int); |
| 1868 | var *tv; |
| 1869 | node *an[4]; |
| 1870 | var *av[4]; |
| 1871 | char *as[4]; |
| 1872 | regmatch_t pmatch[2]; |
| 1873 | regex_t sreg, *re; |
| 1874 | static tsplitter tspl; |
| 1875 | node *spl; |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 1876 | uint32_t isr, info; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1877 | int nargs; |
| 1878 | time_t tt; |
| 1879 | char *s, *s1; |
| 1880 | int i, l, ll, n; |
| 1881 | |
| 1882 | tv = nvalloc(4); |
| 1883 | isr = info = op->info; |
| 1884 | op = op->l.n; |
| 1885 | |
| 1886 | av[2] = av[3] = NULL; |
| 1887 | for (i=0 ; i<4 && op ; i++) { |
| 1888 | an[i] = nextarg(&op); |
| 1889 | if (isr & 0x09000000) av[i] = evaluate(an[i], &tv[i]); |
| 1890 | if (isr & 0x08000000) as[i] = getvar_s(av[i]); |
| 1891 | isr >>= 1; |
| 1892 | } |
| 1893 | |
| 1894 | nargs = i; |
| 1895 | if (nargs < (info >> 30)) |
| 1896 | runtime_error(EMSG_TOO_FEW_ARGS); |
| 1897 | |
| 1898 | switch (info & OPNMASK) { |
| 1899 | |
| 1900 | case B_a2: |
| 1901 | #ifdef CONFIG_FEATURE_AWK_MATH |
| 1902 | setvar_i(res, atan2(getvar_i(av[i]), getvar_i(av[1]))); |
| 1903 | #else |
| 1904 | runtime_error(EMSG_NO_MATH); |
| 1905 | #endif |
| 1906 | break; |
| 1907 | |
| 1908 | case B_sp: |
| 1909 | if (nargs > 2) { |
| 1910 | spl = (an[2]->info & OPCLSMASK) == OC_REGEXP ? |
| 1911 | an[2] : mk_splitter(getvar_s(evaluate(an[2], &tv[2])), &tspl); |
| 1912 | } else { |
| 1913 | spl = &fsplitter.n; |
| 1914 | } |
| 1915 | |
| 1916 | n = awk_split(as[0], spl, &s); |
| 1917 | s1 = s; |
| 1918 | clear_array(iamarray(av[1])); |
| 1919 | for (i=1; i<=n; i++) |
| 1920 | setari_u(av[1], i, nextword(&s1)); |
| 1921 | free(s); |
| 1922 | setvar_i(res, n); |
| 1923 | break; |
| 1924 | |
| 1925 | case B_ss: |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1926 | l = strlen(as[0]); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1927 | i = getvar_i(av[1]) - 1; |
| 1928 | if (i>l) i=l; if (i<0) i=0; |
| 1929 | n = (nargs > 2) ? getvar_i(av[2]) : l-i; |
| 1930 | if (n<0) n=0; |
| 1931 | s = xmalloc(n+1); |
| 1932 | strncpy(s, as[0]+i, n); |
| 1933 | s[n] = '\0'; |
| 1934 | setvar_p(res, s); |
| 1935 | break; |
| 1936 | |
| 1937 | case B_lo: |
| 1938 | to_xxx = tolower; |
| 1939 | goto lo_cont; |
| 1940 | |
| 1941 | case B_up: |
| 1942 | to_xxx = toupper; |
| 1943 | lo_cont: |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1944 | s1 = s = bb_xstrdup(as[0]); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1945 | while (*s1) { |
| 1946 | *s1 = (*to_xxx)(*s1); |
| 1947 | s1++; |
| 1948 | } |
| 1949 | setvar_p(res, s); |
| 1950 | break; |
| 1951 | |
| 1952 | case B_ix: |
| 1953 | n = 0; |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 1954 | ll = strlen(as[1]); |
| 1955 | l = strlen(as[0]) - ll; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 1956 | if (ll > 0 && l >= 0) { |
| 1957 | if (! icase) { |
| 1958 | s = strstr(as[0], as[1]); |
| 1959 | if (s) n = (s - as[0]) + 1; |
| 1960 | } else { |
| 1961 | /* this piece of code is terribly slow and |
| 1962 | * really should be rewritten |
| 1963 | */ |
| 1964 | for (i=0; i<=l; i++) { |
| 1965 | if (strncasecmp(as[0]+i, as[1], ll) == 0) { |
| 1966 | n = i+1; |
| 1967 | break; |
| 1968 | } |
| 1969 | } |
| 1970 | } |
| 1971 | } |
| 1972 | setvar_i(res, n); |
| 1973 | break; |
| 1974 | |
| 1975 | case B_ti: |
| 1976 | if (nargs > 1) |
| 1977 | tt = getvar_i(av[1]); |
| 1978 | else |
| 1979 | time(&tt); |
| 1980 | s = (nargs > 0) ? as[0] : "%a %b %d %H:%M:%S %Z %Y"; |
| 1981 | i = strftime(buf, MAXVARFMT, s, localtime(&tt)); |
| 1982 | buf[i] = '\0'; |
| 1983 | setvar_s(res, buf); |
| 1984 | break; |
| 1985 | |
| 1986 | case B_ma: |
| 1987 | re = as_regex(an[1], &sreg); |
| 1988 | n = regexec(re, as[0], 1, pmatch, 0); |
| 1989 | if (n == 0) { |
| 1990 | pmatch[0].rm_so++; |
| 1991 | pmatch[0].rm_eo++; |
| 1992 | } else { |
| 1993 | pmatch[0].rm_so = 0; |
| 1994 | pmatch[0].rm_eo = -1; |
| 1995 | } |
| 1996 | setvar_i(newvar("RSTART"), pmatch[0].rm_so); |
| 1997 | setvar_i(newvar("RLENGTH"), pmatch[0].rm_eo - pmatch[0].rm_so); |
| 1998 | setvar_i(res, pmatch[0].rm_so); |
| 1999 | if (re == &sreg) regfree(re); |
| 2000 | break; |
| 2001 | |
| 2002 | case B_ge: |
| 2003 | awk_sub(an[0], as[1], getvar_i(av[2]), av[3], res, TRUE); |
| 2004 | break; |
| 2005 | |
| 2006 | case B_gs: |
| 2007 | setvar_i(res, awk_sub(an[0], as[1], 0, av[2], av[2], FALSE)); |
| 2008 | break; |
| 2009 | |
| 2010 | case B_su: |
| 2011 | setvar_i(res, awk_sub(an[0], as[1], 1, av[2], av[2], FALSE)); |
| 2012 | break; |
| 2013 | } |
| 2014 | |
| 2015 | nvfree(tv); |
| 2016 | return res; |
| 2017 | } |
| 2018 | |
| 2019 | /* |
| 2020 | * Evaluate node - the heart of the program. Supplied with subtree |
| 2021 | * and place where to store result. returns ptr to result. |
| 2022 | */ |
| 2023 | #define XC(n) ((n) >> 8) |
| 2024 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 2025 | static var *evaluate(node *op, var *res) |
| 2026 | { |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2027 | /* This procedure is recursive so we should count every byte */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2028 | static var *fnargs = NULL; |
| 2029 | static unsigned int seed = 1; |
| 2030 | static regex_t sreg; |
| 2031 | node *op1; |
| 2032 | var *v1; |
| 2033 | union { |
| 2034 | var *v; |
| 2035 | char *s; |
| 2036 | double d; |
| 2037 | int i; |
| 2038 | } L, R; |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 2039 | uint32_t opinfo; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2040 | short opn; |
| 2041 | union { |
| 2042 | char *s; |
| 2043 | rstream *rsm; |
| 2044 | FILE *F; |
| 2045 | var *v; |
| 2046 | regex_t *re; |
Mike Frysinger | f87b3e3 | 2005-09-27 04:16:22 +0000 | [diff] [blame] | 2047 | uint32_t info; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2048 | } X; |
| 2049 | |
| 2050 | if (! op) |
| 2051 | return setvar_s(res, NULL); |
| 2052 | |
| 2053 | v1 = nvalloc(2); |
| 2054 | |
| 2055 | while (op) { |
| 2056 | |
| 2057 | opinfo = op->info; |
| 2058 | opn = (short)(opinfo & OPNMASK); |
| 2059 | lineno = op->lineno; |
| 2060 | |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2061 | /* execute inevitable things */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2062 | op1 = op->l.n; |
| 2063 | if (opinfo & OF_RES1) X.v = L.v = evaluate(op1, v1); |
| 2064 | if (opinfo & OF_RES2) R.v = evaluate(op->r.n, v1+1); |
| 2065 | if (opinfo & OF_STR1) L.s = getvar_s(L.v); |
| 2066 | if (opinfo & OF_STR2) R.s = getvar_s(R.v); |
| 2067 | if (opinfo & OF_NUM1) L.d = getvar_i(L.v); |
| 2068 | |
| 2069 | switch (XC(opinfo & OPCLSMASK)) { |
| 2070 | |
| 2071 | /* -- iterative node type -- */ |
| 2072 | |
| 2073 | /* test pattern */ |
| 2074 | case XC( OC_TEST ): |
| 2075 | if ((op1->info & OPCLSMASK) == OC_COMMA) { |
| 2076 | /* it's range pattern */ |
| 2077 | if ((opinfo & OF_CHECKED) || ptest(op1->l.n)) { |
| 2078 | op->info |= OF_CHECKED; |
| 2079 | if (ptest(op1->r.n)) |
| 2080 | op->info &= ~OF_CHECKED; |
| 2081 | |
| 2082 | op = op->a.n; |
| 2083 | } else { |
| 2084 | op = op->r.n; |
| 2085 | } |
| 2086 | } else { |
| 2087 | op = (ptest(op1)) ? op->a.n : op->r.n; |
| 2088 | } |
| 2089 | break; |
| 2090 | |
| 2091 | /* just evaluate an expression, also used as unconditional jump */ |
| 2092 | case XC( OC_EXEC ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2093 | break; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2094 | |
| 2095 | /* branch, used in if-else and various loops */ |
| 2096 | case XC( OC_BR ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2097 | op = istrue(L.v) ? op->a.n : op->r.n; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2098 | break; |
| 2099 | |
| 2100 | /* initialize for-in loop */ |
| 2101 | case XC( OC_WALKINIT ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2102 | hashwalk_init(L.v, iamarray(R.v)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2103 | break; |
| 2104 | |
| 2105 | /* get next array item */ |
| 2106 | case XC( OC_WALKNEXT ): |
| 2107 | op = hashwalk_next(L.v) ? op->a.n : op->r.n; |
| 2108 | break; |
| 2109 | |
| 2110 | case XC( OC_PRINT ): |
| 2111 | case XC( OC_PRINTF ): |
| 2112 | X.F = stdout; |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2113 | if (op->r.n) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2114 | X.rsm = newfile(R.s); |
| 2115 | if (! X.rsm->F) { |
| 2116 | if (opn == '|') { |
| 2117 | if((X.rsm->F = popen(R.s, "w")) == NULL) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2118 | bb_perror_msg_and_die("popen"); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2119 | X.rsm->is_pipe = 1; |
| 2120 | } else { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2121 | X.rsm->F = bb_xfopen(R.s, opn=='w' ? "w" : "a"); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2122 | } |
| 2123 | } |
| 2124 | X.F = X.rsm->F; |
| 2125 | } |
| 2126 | |
| 2127 | if ((opinfo & OPCLSMASK) == OC_PRINT) { |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2128 | if (! op1) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2129 | fputs(getvar_s(V[F0]), X.F); |
| 2130 | } else { |
| 2131 | while (op1) { |
| 2132 | L.v = evaluate(nextarg(&op1), v1); |
| 2133 | if (L.v->type & VF_NUMBER) { |
| 2134 | fmt_num(buf, MAXVARFMT, getvar_s(V[OFMT]), |
| 2135 | getvar_i(L.v), TRUE); |
| 2136 | fputs(buf, X.F); |
| 2137 | } else { |
| 2138 | fputs(getvar_s(L.v), X.F); |
| 2139 | } |
| 2140 | |
| 2141 | if (op1) fputs(getvar_s(V[OFS]), X.F); |
| 2142 | } |
| 2143 | } |
| 2144 | fputs(getvar_s(V[ORS]), X.F); |
| 2145 | |
| 2146 | } else { /* OC_PRINTF */ |
| 2147 | L.s = awk_printf(op1); |
| 2148 | fputs(L.s, X.F); |
| 2149 | free(L.s); |
| 2150 | } |
| 2151 | fflush(X.F); |
| 2152 | break; |
| 2153 | |
| 2154 | case XC( OC_DELETE ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2155 | X.info = op1->info & OPCLSMASK; |
| 2156 | if (X.info == OC_VAR) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2157 | R.v = op1->l.v; |
| 2158 | } else if (X.info == OC_FNARG) { |
| 2159 | R.v = &fnargs[op1->l.i]; |
| 2160 | } else { |
| 2161 | runtime_error(EMSG_NOT_ARRAY); |
| 2162 | } |
| 2163 | |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2164 | if (op1->r.n) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2165 | clrvar(L.v); |
| 2166 | L.s = getvar_s(evaluate(op1->r.n, v1)); |
| 2167 | hash_remove(iamarray(R.v), L.s); |
| 2168 | } else { |
| 2169 | clear_array(iamarray(R.v)); |
| 2170 | } |
| 2171 | break; |
| 2172 | |
| 2173 | case XC( OC_NEWSOURCE ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2174 | programname = op->l.s; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2175 | break; |
| 2176 | |
| 2177 | case XC( OC_RETURN ): |
| 2178 | copyvar(res, L.v); |
| 2179 | break; |
| 2180 | |
| 2181 | case XC( OC_NEXTFILE ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2182 | nextfile = TRUE; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2183 | case XC( OC_NEXT ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2184 | nextrec = TRUE; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2185 | case XC( OC_DONE ): |
| 2186 | clrvar(res); |
| 2187 | break; |
| 2188 | |
| 2189 | case XC( OC_EXIT ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2190 | awk_exit(L.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2191 | |
| 2192 | /* -- recursive node type -- */ |
| 2193 | |
| 2194 | case XC( OC_VAR ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2195 | L.v = op->l.v; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2196 | if (L.v == V[NF]) |
| 2197 | split_f0(); |
| 2198 | goto v_cont; |
| 2199 | |
| 2200 | case XC( OC_FNARG ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2201 | L.v = &fnargs[op->l.i]; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2202 | |
| 2203 | v_cont: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2204 | res = (op->r.n) ? findvar(iamarray(L.v), R.s) : L.v; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2205 | break; |
| 2206 | |
| 2207 | case XC( OC_IN ): |
| 2208 | setvar_i(res, hash_search(iamarray(R.v), L.s) ? 1 : 0); |
| 2209 | break; |
| 2210 | |
| 2211 | case XC( OC_REGEXP ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2212 | op1 = op; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2213 | L.s = getvar_s(V[F0]); |
| 2214 | goto re_cont; |
| 2215 | |
| 2216 | case XC( OC_MATCH ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2217 | op1 = op->r.n; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2218 | re_cont: |
| 2219 | X.re = as_regex(op1, &sreg); |
| 2220 | R.i = regexec(X.re, L.s, 0, NULL, 0); |
| 2221 | if (X.re == &sreg) regfree(X.re); |
| 2222 | setvar_i(res, (R.i == 0 ? 1 : 0) ^ (opn == '!' ? 1 : 0)); |
| 2223 | break; |
| 2224 | |
| 2225 | case XC( OC_MOVE ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2226 | /* if source is a temporary string, jusk relink it to dest */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2227 | if (R.v == v1+1 && R.v->string) { |
| 2228 | res = setvar_p(L.v, R.v->string); |
| 2229 | R.v->string = NULL; |
| 2230 | } else { |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2231 | res = copyvar(L.v, R.v); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2232 | } |
| 2233 | break; |
| 2234 | |
| 2235 | case XC( OC_TERNARY ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2236 | if ((op->r.n->info & OPCLSMASK) != OC_COLON) |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2237 | runtime_error(EMSG_POSSIBLE_ERROR); |
| 2238 | res = evaluate(istrue(L.v) ? op->r.n->l.n : op->r.n->r.n, res); |
| 2239 | break; |
| 2240 | |
| 2241 | case XC( OC_FUNC ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2242 | if (! op->r.f->body.first) |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2243 | runtime_error(EMSG_UNDEF_FUNC); |
| 2244 | |
| 2245 | X.v = R.v = nvalloc(op->r.f->nargs+1); |
| 2246 | while (op1) { |
| 2247 | L.v = evaluate(nextarg(&op1), v1); |
| 2248 | copyvar(R.v, L.v); |
| 2249 | R.v->type |= VF_CHILD; |
| 2250 | R.v->x.parent = L.v; |
| 2251 | if (++R.v - X.v >= op->r.f->nargs) |
| 2252 | break; |
| 2253 | } |
| 2254 | |
| 2255 | R.v = fnargs; |
| 2256 | fnargs = X.v; |
| 2257 | |
| 2258 | L.s = programname; |
| 2259 | res = evaluate(op->r.f->body.first, res); |
| 2260 | programname = L.s; |
| 2261 | |
| 2262 | nvfree(fnargs); |
| 2263 | fnargs = R.v; |
| 2264 | break; |
| 2265 | |
| 2266 | case XC( OC_GETLINE ): |
| 2267 | case XC( OC_PGETLINE ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2268 | if (op1) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2269 | X.rsm = newfile(L.s); |
| 2270 | if (! X.rsm->F) { |
| 2271 | if ((opinfo & OPCLSMASK) == OC_PGETLINE) { |
| 2272 | X.rsm->F = popen(L.s, "r"); |
| 2273 | X.rsm->is_pipe = TRUE; |
| 2274 | } else { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2275 | X.rsm->F = fopen(L.s, "r"); /* not bb_xfopen! */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2276 | } |
| 2277 | } |
| 2278 | } else { |
| 2279 | if (! iF) iF = next_input_file(); |
| 2280 | X.rsm = iF; |
| 2281 | } |
| 2282 | |
| 2283 | if (! X.rsm->F) { |
| 2284 | setvar_i(V[ERRNO], errno); |
| 2285 | setvar_i(res, -1); |
| 2286 | break; |
| 2287 | } |
| 2288 | |
| 2289 | if (! op->r.n) |
| 2290 | R.v = V[F0]; |
| 2291 | |
| 2292 | L.i = awk_getline(X.rsm, R.v); |
| 2293 | if (L.i > 0) { |
| 2294 | if (! op1) { |
| 2295 | incvar(V[FNR]); |
| 2296 | incvar(V[NR]); |
| 2297 | } |
| 2298 | } |
| 2299 | setvar_i(res, L.i); |
| 2300 | break; |
| 2301 | |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2302 | /* simple builtins */ |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2303 | case XC( OC_FBLTIN ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2304 | switch (opn) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2305 | |
| 2306 | case F_in: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2307 | R.d = (int)L.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2308 | break; |
| 2309 | |
| 2310 | case F_rn: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2311 | R.d = (double)rand() / (double)RAND_MAX; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2312 | break; |
| 2313 | |
| 2314 | #ifdef CONFIG_FEATURE_AWK_MATH |
| 2315 | case F_co: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2316 | R.d = cos(L.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2317 | break; |
| 2318 | |
| 2319 | case F_ex: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2320 | R.d = exp(L.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2321 | break; |
| 2322 | |
| 2323 | case F_lg: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2324 | R.d = log(L.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2325 | break; |
| 2326 | |
| 2327 | case F_si: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2328 | R.d = sin(L.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2329 | break; |
| 2330 | |
| 2331 | case F_sq: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2332 | R.d = sqrt(L.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2333 | break; |
| 2334 | #else |
| 2335 | case F_co: |
| 2336 | case F_ex: |
| 2337 | case F_lg: |
| 2338 | case F_si: |
| 2339 | case F_sq: |
| 2340 | runtime_error(EMSG_NO_MATH); |
| 2341 | break; |
| 2342 | #endif |
| 2343 | |
| 2344 | case F_sr: |
| 2345 | R.d = (double)seed; |
| 2346 | seed = op1 ? (unsigned int)L.d : (unsigned int)time(NULL); |
| 2347 | srand(seed); |
| 2348 | break; |
| 2349 | |
| 2350 | case F_ti: |
| 2351 | R.d = time(NULL); |
| 2352 | break; |
| 2353 | |
| 2354 | case F_le: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2355 | if (! op1) |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2356 | L.s = getvar_s(V[F0]); |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 2357 | R.d = strlen(L.s); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2358 | break; |
| 2359 | |
| 2360 | case F_sy: |
| 2361 | fflush(NULL); |
Rob Landley | 5184336 | 2006-01-09 05:26:58 +0000 | [diff] [blame] | 2362 | R.d = (L.s && *L.s) ? (system(L.s) >> 8) : 0; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2363 | break; |
| 2364 | |
| 2365 | case F_ff: |
| 2366 | if (! op1) |
| 2367 | fflush(stdout); |
| 2368 | else { |
| 2369 | if (L.s && *L.s) { |
| 2370 | X.rsm = newfile(L.s); |
| 2371 | fflush(X.rsm->F); |
| 2372 | } else { |
| 2373 | fflush(NULL); |
| 2374 | } |
| 2375 | } |
| 2376 | break; |
| 2377 | |
| 2378 | case F_cl: |
| 2379 | X.rsm = (rstream *)hash_search(fdhash, L.s); |
| 2380 | if (X.rsm) { |
| 2381 | R.i = X.rsm->is_pipe ? pclose(X.rsm->F) : fclose(X.rsm->F); |
Aaron Lehmann | a170e1c | 2002-11-28 11:27:31 +0000 | [diff] [blame] | 2382 | free(X.rsm->buffer); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2383 | hash_remove(fdhash, L.s); |
| 2384 | } |
| 2385 | if (R.i != 0) |
| 2386 | setvar_i(V[ERRNO], errno); |
| 2387 | R.d = (double)R.i; |
| 2388 | break; |
| 2389 | } |
| 2390 | setvar_i(res, R.d); |
| 2391 | break; |
| 2392 | |
| 2393 | case XC( OC_BUILTIN ): |
| 2394 | res = exec_builtin(op, res); |
| 2395 | break; |
| 2396 | |
| 2397 | case XC( OC_SPRINTF ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2398 | setvar_p(res, awk_printf(op1)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2399 | break; |
| 2400 | |
| 2401 | case XC( OC_UNARY ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2402 | X.v = R.v; |
| 2403 | L.d = R.d = getvar_i(R.v); |
| 2404 | switch (opn) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2405 | case 'P': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2406 | L.d = ++R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2407 | goto r_op_change; |
| 2408 | case 'p': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2409 | R.d++; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2410 | goto r_op_change; |
| 2411 | case 'M': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2412 | L.d = --R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2413 | goto r_op_change; |
| 2414 | case 'm': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2415 | R.d--; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2416 | goto r_op_change; |
| 2417 | case '!': |
| 2418 | L.d = istrue(X.v) ? 0 : 1; |
| 2419 | break; |
| 2420 | case '-': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2421 | L.d = -R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2422 | break; |
| 2423 | r_op_change: |
| 2424 | setvar_i(X.v, R.d); |
| 2425 | } |
| 2426 | setvar_i(res, L.d); |
| 2427 | break; |
| 2428 | |
| 2429 | case XC( OC_FIELD ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2430 | R.i = (int)getvar_i(R.v); |
| 2431 | if (R.i == 0) { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2432 | res = V[F0]; |
| 2433 | } else { |
| 2434 | split_f0(); |
| 2435 | if (R.i > nfields) |
| 2436 | fsrealloc(R.i); |
| 2437 | |
| 2438 | res = &Fields[R.i-1]; |
| 2439 | } |
| 2440 | break; |
| 2441 | |
| 2442 | /* concatenation (" ") and index joining (",") */ |
| 2443 | case XC( OC_CONCAT ): |
| 2444 | case XC( OC_COMMA ): |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 2445 | opn = strlen(L.s) + strlen(R.s) + 2; |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2446 | X.s = (char *)xmalloc(opn); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2447 | strcpy(X.s, L.s); |
| 2448 | if ((opinfo & OPCLSMASK) == OC_COMMA) { |
| 2449 | L.s = getvar_s(V[SUBSEP]); |
Rob Landley | a389651 | 2006-05-07 20:20:34 +0000 | [diff] [blame] | 2450 | X.s = (char *)xrealloc(X.s, opn + strlen(L.s)); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2451 | strcat(X.s, L.s); |
| 2452 | } |
| 2453 | strcat(X.s, R.s); |
| 2454 | setvar_p(res, X.s); |
| 2455 | break; |
| 2456 | |
| 2457 | case XC( OC_LAND ): |
| 2458 | setvar_i(res, istrue(L.v) ? ptest(op->r.n) : 0); |
| 2459 | break; |
| 2460 | |
| 2461 | case XC( OC_LOR ): |
| 2462 | setvar_i(res, istrue(L.v) ? 1 : ptest(op->r.n)); |
| 2463 | break; |
| 2464 | |
| 2465 | case XC( OC_BINARY ): |
| 2466 | case XC( OC_REPLACE ): |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2467 | R.d = getvar_i(R.v); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2468 | switch (opn) { |
| 2469 | case '+': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2470 | L.d += R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2471 | break; |
| 2472 | case '-': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2473 | L.d -= R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2474 | break; |
| 2475 | case '*': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2476 | L.d *= R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2477 | break; |
| 2478 | case '/': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2479 | if (R.d == 0) runtime_error(EMSG_DIV_BY_ZERO); |
| 2480 | L.d /= R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2481 | break; |
| 2482 | case '&': |
| 2483 | #ifdef CONFIG_FEATURE_AWK_MATH |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2484 | L.d = pow(L.d, R.d); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2485 | #else |
| 2486 | runtime_error(EMSG_NO_MATH); |
| 2487 | #endif |
| 2488 | break; |
| 2489 | case '%': |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2490 | if (R.d == 0) runtime_error(EMSG_DIV_BY_ZERO); |
| 2491 | L.d -= (int)(L.d / R.d) * R.d; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2492 | break; |
| 2493 | } |
| 2494 | res = setvar_i(((opinfo&OPCLSMASK) == OC_BINARY) ? res : X.v, L.d); |
| 2495 | break; |
| 2496 | |
| 2497 | case XC( OC_COMPARE ): |
| 2498 | if (is_numeric(L.v) && is_numeric(R.v)) { |
| 2499 | L.d = getvar_i(L.v) - getvar_i(R.v); |
| 2500 | } else { |
| 2501 | L.s = getvar_s(L.v); |
| 2502 | R.s = getvar_s(R.v); |
| 2503 | L.d = icase ? strcasecmp(L.s, R.s) : strcmp(L.s, R.s); |
| 2504 | } |
| 2505 | switch (opn & 0xfe) { |
| 2506 | case 0: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2507 | R.i = (L.d > 0); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2508 | break; |
| 2509 | case 2: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2510 | R.i = (L.d >= 0); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2511 | break; |
| 2512 | case 4: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2513 | R.i = (L.d == 0); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2514 | break; |
| 2515 | } |
| 2516 | setvar_i(res, (opn & 0x1 ? R.i : !R.i) ? 1 : 0); |
| 2517 | break; |
| 2518 | |
| 2519 | default: |
Mike Frysinger | de2b938 | 2005-09-27 03:18:00 +0000 | [diff] [blame] | 2520 | runtime_error(EMSG_POSSIBLE_ERROR); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2521 | } |
| 2522 | if ((opinfo & OPCLSMASK) <= SHIFT_TIL_THIS) |
| 2523 | op = op->a.n; |
| 2524 | if ((opinfo & OPCLSMASK) >= RECUR_FROM_THIS) |
| 2525 | break; |
| 2526 | if (nextrec) |
| 2527 | break; |
| 2528 | } |
| 2529 | nvfree(v1); |
| 2530 | return res; |
| 2531 | } |
| 2532 | |
| 2533 | |
| 2534 | /* -------- main & co. -------- */ |
| 2535 | |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 2536 | static int awk_exit(int r) |
| 2537 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2538 | unsigned int i; |
| 2539 | hash_item *hi; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 2540 | static var tv; |
| 2541 | |
| 2542 | if (! exiting) { |
| 2543 | exiting = TRUE; |
Glenn L McGrath | ca29ffc | 2004-09-24 09:24:27 +0000 | [diff] [blame] | 2544 | nextrec = FALSE; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 2545 | evaluate(endseq.first, &tv); |
| 2546 | } |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2547 | |
| 2548 | /* waiting for children */ |
| 2549 | for (i=0; i<fdhash->csize; i++) { |
| 2550 | hi = fdhash->items[i]; |
| 2551 | while(hi) { |
| 2552 | if (hi->data.rs.F && hi->data.rs.is_pipe) |
| 2553 | pclose(hi->data.rs.F); |
| 2554 | hi = hi->next; |
| 2555 | } |
| 2556 | } |
| 2557 | |
| 2558 | exit(r); |
| 2559 | } |
| 2560 | |
| 2561 | /* if expr looks like "var=value", perform assignment and return 1, |
| 2562 | * otherwise return 0 */ |
"Vladimir N. Oleynik" | 5cf9a03 | 2005-10-19 09:21:51 +0000 | [diff] [blame] | 2563 | static int is_assignment(const char *expr) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 2564 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2565 | char *exprc, *s, *s0, *s1; |
| 2566 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2567 | exprc = bb_xstrdup(expr); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2568 | if (!isalnum_(*exprc) || (s = strchr(exprc, '=')) == NULL) { |
| 2569 | free(exprc); |
| 2570 | return FALSE; |
| 2571 | } |
| 2572 | |
| 2573 | *(s++) = '\0'; |
| 2574 | s0 = s1 = s; |
| 2575 | while (*s) |
| 2576 | *(s1++) = nextchar(&s); |
| 2577 | |
| 2578 | *s1 = '\0'; |
| 2579 | setvar_u(newvar(exprc), s0); |
| 2580 | free(exprc); |
| 2581 | return TRUE; |
| 2582 | } |
| 2583 | |
| 2584 | /* switch to next input file */ |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 2585 | static rstream *next_input_file(void) |
| 2586 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2587 | static rstream rsm; |
| 2588 | FILE *F = NULL; |
| 2589 | char *fname, *ind; |
| 2590 | static int files_happen = FALSE; |
| 2591 | |
| 2592 | if (rsm.F) fclose(rsm.F); |
| 2593 | rsm.F = NULL; |
Glenn L McGrath | 00ed36f | 2003-10-30 13:36:39 +0000 | [diff] [blame] | 2594 | rsm.pos = rsm.adv = 0; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2595 | |
| 2596 | do { |
| 2597 | if (getvar_i(V[ARGIND])+1 >= getvar_i(V[ARGC])) { |
| 2598 | if (files_happen) |
| 2599 | return NULL; |
| 2600 | fname = "-"; |
| 2601 | F = stdin; |
| 2602 | } else { |
| 2603 | ind = getvar_s(incvar(V[ARGIND])); |
| 2604 | fname = getvar_s(findvar(iamarray(V[ARGV]), ind)); |
| 2605 | if (fname && *fname && !is_assignment(fname)) |
| 2606 | F = afopen(fname, "r"); |
| 2607 | } |
| 2608 | } while (!F); |
| 2609 | |
| 2610 | files_happen = TRUE; |
| 2611 | setvar_s(V[FILENAME], fname); |
| 2612 | rsm.F = F; |
| 2613 | return &rsm; |
| 2614 | } |
| 2615 | |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 2616 | int awk_main(int argc, char **argv) |
Mike Frysinger | 10a11e2 | 2005-09-27 02:23:02 +0000 | [diff] [blame] | 2617 | { |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2618 | char *s, *s1; |
Rob Landley | 46e351d | 2006-02-14 16:05:32 +0000 | [diff] [blame] | 2619 | int i, j, c, flen; |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2620 | var *v; |
| 2621 | static var tv; |
| 2622 | char **envp; |
| 2623 | static int from_file = FALSE; |
| 2624 | rstream *rsm; |
| 2625 | FILE *F, *stdfiles[3]; |
| 2626 | static char * stdnames = "/dev/stdin\0/dev/stdout\0/dev/stderr"; |
| 2627 | |
| 2628 | /* allocate global buffer */ |
| 2629 | buf = xmalloc(MAXVARFMT+1); |
| 2630 | |
| 2631 | vhash = hash_init(); |
| 2632 | ahash = hash_init(); |
| 2633 | fdhash = hash_init(); |
| 2634 | fnhash = hash_init(); |
| 2635 | |
| 2636 | /* initialize variables */ |
| 2637 | for (i=0; *vNames; i++) { |
| 2638 | V[i] = v = newvar(nextword(&vNames)); |
| 2639 | if (*vValues != '\377') |
| 2640 | setvar_s(v, nextword(&vValues)); |
| 2641 | else |
| 2642 | setvar_i(v, 0); |
| 2643 | |
| 2644 | if (*vNames == '*') { |
| 2645 | v->type |= VF_SPECIAL; |
| 2646 | vNames++; |
| 2647 | } |
| 2648 | } |
| 2649 | |
| 2650 | handle_special(V[FS]); |
| 2651 | handle_special(V[RS]); |
| 2652 | |
| 2653 | stdfiles[0] = stdin; |
| 2654 | stdfiles[1] = stdout; |
| 2655 | stdfiles[2] = stderr; |
| 2656 | for (i=0; i<3; i++) { |
| 2657 | rsm = newfile(nextword(&stdnames)); |
| 2658 | rsm->F = stdfiles[i]; |
| 2659 | } |
| 2660 | |
| 2661 | for (envp=environ; *envp; envp++) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2662 | s = bb_xstrdup(*envp); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2663 | s1 = strchr(s, '='); |
Eric Andersen | 67776be | 2004-07-30 23:52:08 +0000 | [diff] [blame] | 2664 | if (!s1) { |
| 2665 | goto keep_going; |
| 2666 | } |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2667 | *(s1++) = '\0'; |
| 2668 | setvar_u(findvar(iamarray(V[ENVIRON]), s), s1); |
Eric Andersen | 67776be | 2004-07-30 23:52:08 +0000 | [diff] [blame] | 2669 | keep_going: |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2670 | free(s); |
| 2671 | } |
| 2672 | |
| 2673 | while((c = getopt(argc, argv, "F:v:f:W:")) != EOF) { |
| 2674 | switch (c) { |
| 2675 | case 'F': |
| 2676 | setvar_s(V[FS], optarg); |
| 2677 | break; |
| 2678 | case 'v': |
| 2679 | if (! is_assignment(optarg)) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2680 | bb_show_usage(); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2681 | break; |
| 2682 | case 'f': |
| 2683 | from_file = TRUE; |
| 2684 | F = afopen(programname = optarg, "r"); |
| 2685 | s = NULL; |
| 2686 | /* one byte is reserved for some trick in next_token */ |
Rob Landley | 46e351d | 2006-02-14 16:05:32 +0000 | [diff] [blame] | 2687 | if (fseek(F, 0, SEEK_END) == 0) { |
| 2688 | flen = ftell(F); |
| 2689 | s = (char *)xmalloc(flen+4); |
| 2690 | fseek(F, 0, SEEK_SET); |
| 2691 | i = 1 + fread(s+1, 1, flen, F); |
| 2692 | } else { |
| 2693 | for (i=j=1; j>0; i+=j) { |
| 2694 | s = (char *)xrealloc(s, i+4096); |
| 2695 | j = fread(s+i, 1, 4094, F); |
| 2696 | } |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2697 | } |
| 2698 | s[i] = '\0'; |
| 2699 | fclose(F); |
| 2700 | parse_program(s+1); |
| 2701 | free(s); |
| 2702 | break; |
| 2703 | case 'W': |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2704 | bb_error_msg("Warning: unrecognized option '-W %s' ignored\n", optarg); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2705 | break; |
| 2706 | |
| 2707 | default: |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2708 | bb_show_usage(); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2709 | } |
| 2710 | } |
| 2711 | |
| 2712 | if (!from_file) { |
| 2713 | if (argc == optind) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2714 | bb_show_usage(); |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2715 | programname="cmd. line"; |
| 2716 | parse_program(argv[optind++]); |
| 2717 | |
| 2718 | } |
| 2719 | |
| 2720 | /* fill in ARGV array */ |
| 2721 | setvar_i(V[ARGC], argc - optind + 1); |
| 2722 | setari_u(V[ARGV], 0, "awk"); |
| 2723 | for(i=optind; i < argc; i++) |
| 2724 | setari_u(V[ARGV], i+1-optind, argv[i]); |
| 2725 | |
| 2726 | evaluate(beginseq.first, &tv); |
| 2727 | if (! mainseq.first && ! endseq.first) |
| 2728 | awk_exit(EXIT_SUCCESS); |
| 2729 | |
| 2730 | /* input file could already be opened in BEGIN block */ |
| 2731 | if (! iF) iF = next_input_file(); |
| 2732 | |
| 2733 | /* passing through input files */ |
| 2734 | while (iF) { |
| 2735 | |
| 2736 | nextfile = FALSE; |
| 2737 | setvar_i(V[FNR], 0); |
| 2738 | |
| 2739 | while ((c = awk_getline(iF, V[F0])) > 0) { |
| 2740 | |
| 2741 | nextrec = FALSE; |
| 2742 | incvar(V[NR]); |
| 2743 | incvar(V[FNR]); |
| 2744 | evaluate(mainseq.first, &tv); |
| 2745 | |
| 2746 | if (nextfile) |
| 2747 | break; |
| 2748 | } |
| 2749 | |
| 2750 | if (c < 0) |
| 2751 | runtime_error(strerror(errno)); |
| 2752 | |
| 2753 | iF = next_input_file(); |
| 2754 | |
| 2755 | } |
| 2756 | |
Glenn L McGrath | 545106f | 2002-11-11 06:21:00 +0000 | [diff] [blame] | 2757 | awk_exit(EXIT_SUCCESS); |
| 2758 | |
| 2759 | return 0; |
| 2760 | } |
| 2761 | |