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|---|
| 39c3038c |
1 | /* $Header: consarg.c,v 3.0.1.7 90/10/15 15:55:28 lwall Locked $ |
| a687059c |
2 | * |
| 3 | * Copyright (c) 1989, Larry Wall |
| 4 | * |
| 5 | * You may distribute under the terms of the GNU General Public License |
| 6 | * as specified in the README file that comes with the perl 3.0 kit. |
| 7 | * |
| 8 | * $Log: consarg.c,v $ |
| 39c3038c |
9 | * Revision 3.0.1.7 90/10/15 15:55:28 lwall |
| 10 | * patch29: defined @foo was behaving inconsistently |
| 11 | * patch29: -5 % 5 was wrong |
| 12 | * patch29: package behavior is now more consistent |
| 13 | * |
| ff8e2863 |
14 | * Revision 3.0.1.6 90/08/09 02:38:51 lwall |
| 15 | * patch19: fixed problem with % of negative number |
| 16 | * |
| b1248f16 |
17 | * Revision 3.0.1.5 90/03/27 15:36:45 lwall |
| 18 | * patch16: support for machines that can't cast negative floats to unsigned ints |
| 19 | * |
| ff2452de |
20 | * Revision 3.0.1.4 90/03/12 16:24:40 lwall |
| 21 | * patch13: return (@array) did counter-intuitive things |
| 22 | * |
| afd9f252 |
23 | * Revision 3.0.1.3 90/02/28 16:47:54 lwall |
| 24 | * patch9: the x operator is now up to 10 times faster |
| 25 | * patch9: @_ clobbered by ($foo,$bar) = split |
| 26 | * |
| 0d3e774c |
27 | * Revision 3.0.1.2 89/11/17 15:11:34 lwall |
| 28 | * patch5: defined $foo{'bar'} should not create element |
| 29 | * |
| bf38876a |
30 | * Revision 3.0.1.1 89/11/11 04:14:30 lwall |
| 31 | * patch2: '-' x 26 made warnings about undefined value |
| 32 | * patch2: eval with no args caused strangeness |
| 33 | * patch2: local(@foo) didn't work, but local(@foo,$bar) did |
| 34 | * |
| a687059c |
35 | * Revision 3.0 89/10/18 15:10:30 lwall |
| 36 | * 3.0 baseline |
| 37 | * |
| 38 | */ |
| 39 | |
| 40 | #include "EXTERN.h" |
| 41 | #include "perl.h" |
| 42 | static int nothing_in_common(); |
| 43 | static int arg_common(); |
| 44 | static int spat_common(); |
| 45 | |
| 46 | ARG * |
| 47 | make_split(stab,arg,limarg) |
| 48 | register STAB *stab; |
| 49 | register ARG *arg; |
| 50 | ARG *limarg; |
| 51 | { |
| 52 | register SPAT *spat; |
| 53 | |
| 54 | if (arg->arg_type != O_MATCH) { |
| 55 | Newz(201,spat,1,SPAT); |
| 56 | spat->spat_next = curstash->tbl_spatroot; /* link into spat list */ |
| 57 | curstash->tbl_spatroot = spat; |
| 58 | |
| 59 | spat->spat_runtime = arg; |
| 60 | arg = make_match(O_MATCH,stab2arg(A_STAB,defstab),spat); |
| 61 | } |
| 62 | Renew(arg,4,ARG); |
| 63 | arg->arg_len = 3; |
| 64 | if (limarg) { |
| 65 | if (limarg->arg_type == O_ITEM) { |
| 66 | Copy(limarg+1,arg+3,1,ARG); |
| 67 | limarg[1].arg_type = A_NULL; |
| 68 | arg_free(limarg); |
| 69 | } |
| 70 | else { |
| ff8e2863 |
71 | arg[3].arg_flags = 0; |
| a687059c |
72 | arg[3].arg_type = A_EXPR; |
| 73 | arg[3].arg_ptr.arg_arg = limarg; |
| 74 | } |
| 75 | } |
| 76 | else |
| 77 | arg[3].arg_type = A_NULL; |
| 78 | arg->arg_type = O_SPLIT; |
| 79 | spat = arg[2].arg_ptr.arg_spat; |
| 80 | spat->spat_repl = stab2arg(A_STAB,aadd(stab)); |
| 81 | if (spat->spat_short) { /* exact match can bypass regexec() */ |
| 82 | if (!((spat->spat_flags & SPAT_SCANFIRST) && |
| 83 | (spat->spat_flags & SPAT_ALL) )) { |
| 84 | str_free(spat->spat_short); |
| 85 | spat->spat_short = Nullstr; |
| 86 | } |
| 87 | } |
| 88 | return arg; |
| 89 | } |
| 90 | |
| 91 | ARG * |
| 92 | mod_match(type,left,pat) |
| 93 | register ARG *left; |
| 94 | register ARG *pat; |
| 95 | { |
| 96 | |
| 97 | register SPAT *spat; |
| 98 | register ARG *newarg; |
| 99 | |
| 39c3038c |
100 | if (!pat) |
| 101 | return Nullarg; |
| 102 | |
| a687059c |
103 | if ((pat->arg_type == O_MATCH || |
| 104 | pat->arg_type == O_SUBST || |
| 105 | pat->arg_type == O_TRANS || |
| 106 | pat->arg_type == O_SPLIT |
| 107 | ) && |
| 108 | pat[1].arg_ptr.arg_stab == defstab ) { |
| 109 | switch (pat->arg_type) { |
| 110 | case O_MATCH: |
| 111 | newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH, |
| 112 | pat->arg_len, |
| 113 | left,Nullarg,Nullarg); |
| 114 | break; |
| 115 | case O_SUBST: |
| 116 | newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST, |
| 117 | pat->arg_len, |
| 118 | left,Nullarg,Nullarg)); |
| 119 | break; |
| 120 | case O_TRANS: |
| 121 | newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS, |
| 122 | pat->arg_len, |
| 123 | left,Nullarg,Nullarg)); |
| 124 | break; |
| 125 | case O_SPLIT: |
| 126 | newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT, |
| 127 | pat->arg_len, |
| 128 | left,Nullarg,Nullarg); |
| 129 | break; |
| 130 | } |
| 131 | if (pat->arg_len >= 2) { |
| 132 | newarg[2].arg_type = pat[2].arg_type; |
| 133 | newarg[2].arg_ptr = pat[2].arg_ptr; |
| 134 | newarg[2].arg_flags = pat[2].arg_flags; |
| 135 | if (pat->arg_len >= 3) { |
| 136 | newarg[3].arg_type = pat[3].arg_type; |
| 137 | newarg[3].arg_ptr = pat[3].arg_ptr; |
| 138 | newarg[3].arg_flags = pat[3].arg_flags; |
| 139 | } |
| 140 | } |
| 141 | Safefree(pat); |
| 142 | } |
| 143 | else { |
| 144 | Newz(202,spat,1,SPAT); |
| 145 | spat->spat_next = curstash->tbl_spatroot; /* link into spat list */ |
| 146 | curstash->tbl_spatroot = spat; |
| 147 | |
| 148 | spat->spat_runtime = pat; |
| 149 | newarg = make_op(type,2,left,Nullarg,Nullarg); |
| 150 | newarg[2].arg_type = A_SPAT | A_DONT; |
| 151 | newarg[2].arg_ptr.arg_spat = spat; |
| 152 | } |
| 153 | |
| 154 | return newarg; |
| 155 | } |
| 156 | |
| 157 | ARG * |
| 158 | make_op(type,newlen,arg1,arg2,arg3) |
| 159 | int type; |
| 160 | int newlen; |
| 161 | ARG *arg1; |
| 162 | ARG *arg2; |
| 163 | ARG *arg3; |
| 164 | { |
| 165 | register ARG *arg; |
| 166 | register ARG *chld; |
| 39c3038c |
167 | register unsigned doarg; |
| 168 | register int i; |
| a687059c |
169 | extern ARG *arg4; /* should be normal arguments, really */ |
| 170 | extern ARG *arg5; |
| 171 | |
| 172 | arg = op_new(newlen); |
| 173 | arg->arg_type = type; |
| a687059c |
174 | if (chld = arg1) { |
| 175 | if (chld->arg_type == O_ITEM && |
| 39c3038c |
176 | (hoistable[ i = (chld[1].arg_type&A_MASK)] || i == A_LVAL || |
| 177 | (i == A_LEXPR && |
| a687059c |
178 | (chld[1].arg_ptr.arg_arg->arg_type == O_LIST || |
| 179 | chld[1].arg_ptr.arg_arg->arg_type == O_ARRAY || |
| 180 | chld[1].arg_ptr.arg_arg->arg_type == O_HASH )))) |
| 181 | { |
| 182 | arg[1].arg_type = chld[1].arg_type; |
| 183 | arg[1].arg_ptr = chld[1].arg_ptr; |
| 184 | arg[1].arg_flags |= chld[1].arg_flags; |
| 185 | arg[1].arg_len = chld[1].arg_len; |
| 186 | free_arg(chld); |
| 187 | } |
| 188 | else { |
| 189 | arg[1].arg_type = A_EXPR; |
| 190 | arg[1].arg_ptr.arg_arg = chld; |
| 191 | } |
| a687059c |
192 | } |
| a687059c |
193 | if (chld = arg2) { |
| 194 | if (chld->arg_type == O_ITEM && |
| 39c3038c |
195 | (hoistable[chld[1].arg_type&A_MASK] || |
| a687059c |
196 | (type == O_ASSIGN && |
| 197 | ((chld[1].arg_type == A_READ && !(arg[1].arg_type & A_DONT)) |
| 198 | || |
| 199 | (chld[1].arg_type == A_INDREAD && !(arg[1].arg_type & A_DONT)) |
| 200 | || |
| 201 | (chld[1].arg_type == A_GLOB && !(arg[1].arg_type & A_DONT)) |
| 202 | ) ) ) ) { |
| 203 | arg[2].arg_type = chld[1].arg_type; |
| 204 | arg[2].arg_ptr = chld[1].arg_ptr; |
| 205 | arg[2].arg_len = chld[1].arg_len; |
| 206 | free_arg(chld); |
| 207 | } |
| 208 | else { |
| 209 | arg[2].arg_type = A_EXPR; |
| 210 | arg[2].arg_ptr.arg_arg = chld; |
| 211 | } |
| a687059c |
212 | } |
| a687059c |
213 | if (chld = arg3) { |
| 39c3038c |
214 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) { |
| a687059c |
215 | arg[3].arg_type = chld[1].arg_type; |
| 216 | arg[3].arg_ptr = chld[1].arg_ptr; |
| 217 | arg[3].arg_len = chld[1].arg_len; |
| 218 | free_arg(chld); |
| 219 | } |
| 220 | else { |
| 221 | arg[3].arg_type = A_EXPR; |
| 222 | arg[3].arg_ptr.arg_arg = chld; |
| 223 | } |
| a687059c |
224 | } |
| 225 | if (newlen >= 4 && (chld = arg4)) { |
| 39c3038c |
226 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) { |
| a687059c |
227 | arg[4].arg_type = chld[1].arg_type; |
| 228 | arg[4].arg_ptr = chld[1].arg_ptr; |
| 229 | arg[4].arg_len = chld[1].arg_len; |
| 230 | free_arg(chld); |
| 231 | } |
| 232 | else { |
| 233 | arg[4].arg_type = A_EXPR; |
| 234 | arg[4].arg_ptr.arg_arg = chld; |
| 235 | } |
| 236 | } |
| 237 | if (newlen >= 5 && (chld = arg5)) { |
| 39c3038c |
238 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) { |
| a687059c |
239 | arg[5].arg_type = chld[1].arg_type; |
| 240 | arg[5].arg_ptr = chld[1].arg_ptr; |
| 241 | arg[5].arg_len = chld[1].arg_len; |
| 242 | free_arg(chld); |
| 243 | } |
| 244 | else { |
| 245 | arg[5].arg_type = A_EXPR; |
| 246 | arg[5].arg_ptr.arg_arg = chld; |
| 247 | } |
| 248 | } |
| 39c3038c |
249 | doarg = opargs[type]; |
| 250 | for (i = 1; i <= newlen; ++i) { |
| 251 | if (!(doarg & 1)) |
| 252 | arg[i].arg_type |= A_DONT; |
| 253 | if (doarg & 2) |
| 254 | arg[i].arg_flags |= AF_ARYOK; |
| 255 | doarg >>= 2; |
| 256 | } |
| a687059c |
257 | #ifdef DEBUGGING |
| 258 | if (debug & 16) { |
| 259 | fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]); |
| 260 | if (arg1) |
| 261 | fprintf(stderr,",%s=%lx", |
| 262 | argname[arg[1].arg_type&A_MASK],arg[1].arg_ptr.arg_arg); |
| 263 | if (arg2) |
| 264 | fprintf(stderr,",%s=%lx", |
| 265 | argname[arg[2].arg_type&A_MASK],arg[2].arg_ptr.arg_arg); |
| 266 | if (arg3) |
| 267 | fprintf(stderr,",%s=%lx", |
| 268 | argname[arg[3].arg_type&A_MASK],arg[3].arg_ptr.arg_arg); |
| 269 | if (newlen >= 4) |
| 270 | fprintf(stderr,",%s=%lx", |
| 271 | argname[arg[4].arg_type&A_MASK],arg[4].arg_ptr.arg_arg); |
| 272 | if (newlen >= 5) |
| 273 | fprintf(stderr,",%s=%lx", |
| 274 | argname[arg[5].arg_type&A_MASK],arg[5].arg_ptr.arg_arg); |
| 275 | fprintf(stderr,")\n"); |
| 276 | } |
| 277 | #endif |
| 278 | evalstatic(arg); /* see if we can consolidate anything */ |
| 279 | return arg; |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | evalstatic(arg) |
| 284 | register ARG *arg; |
| 285 | { |
| 286 | register STR *str; |
| 287 | register STR *s1; |
| 288 | register STR *s2; |
| 289 | double value; /* must not be register */ |
| 290 | register char *tmps; |
| 291 | int i; |
| 292 | unsigned long tmplong; |
| 293 | long tmp2; |
| 294 | double exp(), log(), sqrt(), modf(); |
| 295 | char *crypt(); |
| 296 | double sin(), cos(), atan2(), pow(); |
| 297 | |
| 298 | if (!arg || !arg->arg_len) |
| 299 | return; |
| 300 | |
| 301 | if ((arg[1].arg_type == A_SINGLE || arg->arg_type == O_AELEM) && |
| 302 | (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) { |
| 303 | str = Str_new(20,0); |
| 304 | s1 = arg[1].arg_ptr.arg_str; |
| 305 | if (arg->arg_len > 1) |
| 306 | s2 = arg[2].arg_ptr.arg_str; |
| 307 | else |
| 308 | s2 = Nullstr; |
| 309 | switch (arg->arg_type) { |
| 310 | case O_AELEM: |
| 311 | i = (int)str_gnum(s2); |
| 312 | if (i < 32767 && i >= 0) { |
| 313 | arg->arg_type = O_ITEM; |
| 314 | arg->arg_len = 1; |
| 315 | arg[1].arg_type = A_ARYSTAB; /* $abc[123] is hoistable now */ |
| 316 | arg[1].arg_len = i; |
| a687059c |
317 | str_free(s2); |
| 318 | } |
| 319 | /* FALL THROUGH */ |
| 320 | default: |
| 321 | str_free(str); |
| 322 | str = Nullstr; /* can't be evaluated yet */ |
| 323 | break; |
| 324 | case O_CONCAT: |
| 325 | str_sset(str,s1); |
| 326 | str_scat(str,s2); |
| 327 | break; |
| 328 | case O_REPEAT: |
| 329 | i = (int)str_gnum(s2); |
| afd9f252 |
330 | tmps = str_get(s1); |
| bf38876a |
331 | str_nset(str,"",0); |
| afd9f252 |
332 | STR_GROW(str, i * s1->str_cur + 1); |
| 333 | repeatcpy(str->str_ptr, tmps, s1->str_cur, i); |
| 334 | str->str_cur = i * s1->str_cur; |
| 335 | str->str_ptr[str->str_cur] = '\0'; |
| a687059c |
336 | break; |
| 337 | case O_MULTIPLY: |
| 338 | value = str_gnum(s1); |
| 339 | str_numset(str,value * str_gnum(s2)); |
| 340 | break; |
| 341 | case O_DIVIDE: |
| 342 | value = str_gnum(s2); |
| 343 | if (value == 0.0) |
| 344 | yyerror("Illegal division by constant zero"); |
| 345 | else |
| 346 | str_numset(str,str_gnum(s1) / value); |
| 347 | break; |
| 348 | case O_MODULO: |
| b1248f16 |
349 | tmplong = (unsigned long)str_gnum(s2); |
| a687059c |
350 | if (tmplong == 0L) { |
| 351 | yyerror("Illegal modulus of constant zero"); |
| 352 | break; |
| 353 | } |
| 354 | tmp2 = (long)str_gnum(s1); |
| 355 | #ifndef lint |
| 356 | if (tmp2 >= 0) |
| 357 | str_numset(str,(double)(tmp2 % tmplong)); |
| 358 | else |
| 39c3038c |
359 | str_numset(str,(double)((tmplong-((-tmp2 - 1) % tmplong)) - 1)); |
| a687059c |
360 | #else |
| 361 | tmp2 = tmp2; |
| 362 | #endif |
| 363 | break; |
| 364 | case O_ADD: |
| 365 | value = str_gnum(s1); |
| 366 | str_numset(str,value + str_gnum(s2)); |
| 367 | break; |
| 368 | case O_SUBTRACT: |
| 369 | value = str_gnum(s1); |
| 370 | str_numset(str,value - str_gnum(s2)); |
| 371 | break; |
| 372 | case O_LEFT_SHIFT: |
| 373 | value = str_gnum(s1); |
| 374 | i = (int)str_gnum(s2); |
| 375 | #ifndef lint |
| 376 | str_numset(str,(double)(((long)value) << i)); |
| 377 | #endif |
| 378 | break; |
| 379 | case O_RIGHT_SHIFT: |
| 380 | value = str_gnum(s1); |
| 381 | i = (int)str_gnum(s2); |
| 382 | #ifndef lint |
| 383 | str_numset(str,(double)(((long)value) >> i)); |
| 384 | #endif |
| 385 | break; |
| 386 | case O_LT: |
| 387 | value = str_gnum(s1); |
| 388 | str_numset(str,(value < str_gnum(s2)) ? 1.0 : 0.0); |
| 389 | break; |
| 390 | case O_GT: |
| 391 | value = str_gnum(s1); |
| 392 | str_numset(str,(value > str_gnum(s2)) ? 1.0 : 0.0); |
| 393 | break; |
| 394 | case O_LE: |
| 395 | value = str_gnum(s1); |
| 396 | str_numset(str,(value <= str_gnum(s2)) ? 1.0 : 0.0); |
| 397 | break; |
| 398 | case O_GE: |
| 399 | value = str_gnum(s1); |
| 400 | str_numset(str,(value >= str_gnum(s2)) ? 1.0 : 0.0); |
| 401 | break; |
| 402 | case O_EQ: |
| 403 | if (dowarn) { |
| 404 | if ((!s1->str_nok && !looks_like_number(s1)) || |
| 405 | (!s2->str_nok && !looks_like_number(s2)) ) |
| 406 | warn("Possible use of == on string value"); |
| 407 | } |
| 408 | value = str_gnum(s1); |
| 409 | str_numset(str,(value == str_gnum(s2)) ? 1.0 : 0.0); |
| 410 | break; |
| 411 | case O_NE: |
| 412 | value = str_gnum(s1); |
| 413 | str_numset(str,(value != str_gnum(s2)) ? 1.0 : 0.0); |
| 414 | break; |
| 39c3038c |
415 | case O_NCMP: |
| 416 | value = str_gnum(s1); |
| 417 | value -= str_gnum(s2); |
| 418 | if (value > 0.0) |
| 419 | value = 1.0; |
| 420 | else if (value < 0.0) |
| 421 | value = -1.0; |
| 422 | str_numset(str,value); |
| 423 | break; |
| a687059c |
424 | case O_BIT_AND: |
| 425 | value = str_gnum(s1); |
| 426 | #ifndef lint |
| b1248f16 |
427 | str_numset(str,(double)(U_L(value) & U_L(str_gnum(s2)))); |
| a687059c |
428 | #endif |
| 429 | break; |
| 430 | case O_XOR: |
| 431 | value = str_gnum(s1); |
| 432 | #ifndef lint |
| b1248f16 |
433 | str_numset(str,(double)(U_L(value) ^ U_L(str_gnum(s2)))); |
| a687059c |
434 | #endif |
| 435 | break; |
| 436 | case O_BIT_OR: |
| 437 | value = str_gnum(s1); |
| 438 | #ifndef lint |
| b1248f16 |
439 | str_numset(str,(double)(U_L(value) | U_L(str_gnum(s2)))); |
| a687059c |
440 | #endif |
| 441 | break; |
| 442 | case O_AND: |
| 443 | if (str_true(s1)) |
| 444 | str_sset(str,s2); |
| 445 | else |
| 446 | str_sset(str,s1); |
| 447 | break; |
| 448 | case O_OR: |
| 449 | if (str_true(s1)) |
| 450 | str_sset(str,s1); |
| 451 | else |
| 452 | str_sset(str,s2); |
| 453 | break; |
| 454 | case O_COND_EXPR: |
| 455 | if ((arg[3].arg_type & A_MASK) != A_SINGLE) { |
| 456 | str_free(str); |
| 457 | str = Nullstr; |
| 458 | } |
| 459 | else { |
| 460 | if (str_true(s1)) |
| 461 | str_sset(str,s2); |
| 462 | else |
| 463 | str_sset(str,arg[3].arg_ptr.arg_str); |
| 464 | str_free(arg[3].arg_ptr.arg_str); |
| 465 | } |
| 466 | break; |
| 467 | case O_NEGATE: |
| 468 | str_numset(str,(double)(-str_gnum(s1))); |
| 469 | break; |
| 470 | case O_NOT: |
| 471 | str_numset(str,(double)(!str_true(s1))); |
| 472 | break; |
| 473 | case O_COMPLEMENT: |
| 474 | #ifndef lint |
| b1248f16 |
475 | str_numset(str,(double)(~U_L(str_gnum(s1)))); |
| a687059c |
476 | #endif |
| 477 | break; |
| 478 | case O_SIN: |
| 479 | str_numset(str,sin(str_gnum(s1))); |
| 480 | break; |
| 481 | case O_COS: |
| 482 | str_numset(str,cos(str_gnum(s1))); |
| 483 | break; |
| 484 | case O_ATAN2: |
| 485 | value = str_gnum(s1); |
| 486 | str_numset(str,atan2(value, str_gnum(s2))); |
| 487 | break; |
| 488 | case O_POW: |
| 489 | value = str_gnum(s1); |
| 490 | str_numset(str,pow(value, str_gnum(s2))); |
| 491 | break; |
| 492 | case O_LENGTH: |
| 493 | str_numset(str, (double)str_len(s1)); |
| 494 | break; |
| 495 | case O_SLT: |
| 496 | str_numset(str,(double)(str_cmp(s1,s2) < 0)); |
| 497 | break; |
| 498 | case O_SGT: |
| 499 | str_numset(str,(double)(str_cmp(s1,s2) > 0)); |
| 500 | break; |
| 501 | case O_SLE: |
| 502 | str_numset(str,(double)(str_cmp(s1,s2) <= 0)); |
| 503 | break; |
| 504 | case O_SGE: |
| 505 | str_numset(str,(double)(str_cmp(s1,s2) >= 0)); |
| 506 | break; |
| 507 | case O_SEQ: |
| 508 | str_numset(str,(double)(str_eq(s1,s2))); |
| 509 | break; |
| 510 | case O_SNE: |
| 511 | str_numset(str,(double)(!str_eq(s1,s2))); |
| 512 | break; |
| 39c3038c |
513 | case O_SCMP: |
| 514 | str_numset(str,(double)(str_cmp(s1,s2))); |
| 515 | break; |
| a687059c |
516 | case O_CRYPT: |
| 517 | #ifdef CRYPT |
| 518 | tmps = str_get(s1); |
| 519 | str_set(str,crypt(tmps,str_get(s2))); |
| 520 | #else |
| 521 | yyerror( |
| 522 | "The crypt() function is unimplemented due to excessive paranoia."); |
| 523 | #endif |
| 524 | break; |
| 525 | case O_EXP: |
| 526 | str_numset(str,exp(str_gnum(s1))); |
| 527 | break; |
| 528 | case O_LOG: |
| 529 | str_numset(str,log(str_gnum(s1))); |
| 530 | break; |
| 531 | case O_SQRT: |
| 532 | str_numset(str,sqrt(str_gnum(s1))); |
| 533 | break; |
| 534 | case O_INT: |
| 535 | value = str_gnum(s1); |
| 536 | if (value >= 0.0) |
| 537 | (void)modf(value,&value); |
| 538 | else { |
| 539 | (void)modf(-value,&value); |
| 540 | value = -value; |
| 541 | } |
| 542 | str_numset(str,value); |
| 543 | break; |
| 544 | case O_ORD: |
| 545 | #ifndef I286 |
| 546 | str_numset(str,(double)(*str_get(s1))); |
| 547 | #else |
| 548 | { |
| 549 | int zapc; |
| 550 | char *zaps; |
| 551 | |
| 552 | zaps = str_get(s1); |
| 553 | zapc = (int) *zaps; |
| 554 | str_numset(str,(double)(zapc)); |
| 555 | } |
| 556 | #endif |
| 557 | break; |
| 558 | } |
| 559 | if (str) { |
| 560 | arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */ |
| 561 | str_free(s1); |
| 562 | str_free(s2); |
| 563 | arg[1].arg_ptr.arg_str = str; |
| 564 | } |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | ARG * |
| 569 | l(arg) |
| 570 | register ARG *arg; |
| 571 | { |
| 572 | register int i; |
| 573 | register ARG *arg1; |
| 574 | register ARG *arg2; |
| 575 | SPAT *spat; |
| 576 | int arghog = 0; |
| 577 | |
| 578 | i = arg[1].arg_type & A_MASK; |
| 579 | |
| 580 | arg->arg_flags |= AF_COMMON; /* assume something in common */ |
| 581 | /* which forces us to copy things */ |
| 582 | |
| 583 | if (i == A_ARYLEN) { |
| 584 | arg[1].arg_type = A_LARYLEN; |
| 585 | return arg; |
| 586 | } |
| 587 | if (i == A_ARYSTAB) { |
| 588 | arg[1].arg_type = A_LARYSTAB; |
| 589 | return arg; |
| 590 | } |
| 591 | |
| 592 | /* see if it's an array reference */ |
| 593 | |
| 594 | if (i == A_EXPR || i == A_LEXPR) { |
| 595 | arg1 = arg[1].arg_ptr.arg_arg; |
| 596 | |
| 597 | if (arg1->arg_type == O_LIST || arg1->arg_type == O_ITEM) { |
| 598 | /* assign to list */ |
| 599 | if (arg->arg_len > 1) { |
| 600 | dehoist(arg,2); |
| 601 | arg2 = arg[2].arg_ptr.arg_arg; |
| 602 | if (nothing_in_common(arg1,arg2)) |
| 603 | arg->arg_flags &= ~AF_COMMON; |
| 604 | if (arg->arg_type == O_ASSIGN) { |
| 605 | if (arg1->arg_flags & AF_LOCAL) |
| 606 | arg->arg_flags |= AF_LOCAL; |
| 607 | arg[1].arg_flags |= AF_ARYOK; |
| 608 | arg[2].arg_flags |= AF_ARYOK; |
| 609 | } |
| 610 | } |
| 611 | else if (arg->arg_type != O_CHOP) |
| 612 | arg->arg_type = O_ASSIGN; /* possible local(); */ |
| 613 | for (i = arg1->arg_len; i >= 1; i--) { |
| 614 | switch (arg1[i].arg_type) { |
| 615 | case A_STAR: case A_LSTAR: |
| 616 | arg1[i].arg_type = A_LSTAR; |
| 617 | break; |
| 618 | case A_STAB: case A_LVAL: |
| 619 | arg1[i].arg_type = A_LVAL; |
| 620 | break; |
| 621 | case A_ARYLEN: case A_LARYLEN: |
| 622 | arg1[i].arg_type = A_LARYLEN; |
| 623 | break; |
| 624 | case A_ARYSTAB: case A_LARYSTAB: |
| 625 | arg1[i].arg_type = A_LARYSTAB; |
| 626 | break; |
| 627 | case A_EXPR: case A_LEXPR: |
| 628 | arg1[i].arg_type = A_LEXPR; |
| 629 | switch(arg1[i].arg_ptr.arg_arg->arg_type) { |
| 630 | case O_ARRAY: case O_LARRAY: |
| 631 | arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY; |
| 632 | arghog = 1; |
| 633 | break; |
| 634 | case O_AELEM: case O_LAELEM: |
| 635 | arg1[i].arg_ptr.arg_arg->arg_type = O_LAELEM; |
| 636 | break; |
| 637 | case O_HASH: case O_LHASH: |
| 638 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH; |
| 639 | arghog = 1; |
| 640 | break; |
| 641 | case O_HELEM: case O_LHELEM: |
| 642 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHELEM; |
| 643 | break; |
| 644 | case O_ASLICE: case O_LASLICE: |
| 645 | arg1[i].arg_ptr.arg_arg->arg_type = O_LASLICE; |
| 646 | break; |
| 647 | case O_HSLICE: case O_LHSLICE: |
| 648 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHSLICE; |
| 649 | break; |
| 650 | default: |
| 651 | goto ill_item; |
| 652 | } |
| 653 | break; |
| 654 | default: |
| 655 | ill_item: |
| 656 | (void)sprintf(tokenbuf, "Illegal item (%s) as lvalue", |
| 657 | argname[arg1[i].arg_type&A_MASK]); |
| 658 | yyerror(tokenbuf); |
| 659 | } |
| 660 | } |
| 661 | if (arg->arg_len > 1) { |
| 662 | if (arg2->arg_type == O_SPLIT && !arg2[3].arg_type && !arghog) { |
| 663 | arg2[3].arg_type = A_SINGLE; |
| 664 | arg2[3].arg_ptr.arg_str = |
| 665 | str_nmake((double)arg1->arg_len + 1); /* limit split len*/ |
| 666 | } |
| 667 | } |
| 668 | } |
| 669 | else if (arg1->arg_type == O_AELEM || arg1->arg_type == O_LAELEM) |
| 0d3e774c |
670 | if (arg->arg_type == O_DEFINED) |
| 671 | arg1->arg_type = O_AELEM; |
| 672 | else |
| 673 | arg1->arg_type = O_LAELEM; |
| a687059c |
674 | else if (arg1->arg_type == O_ARRAY || arg1->arg_type == O_LARRAY) { |
| 675 | arg1->arg_type = O_LARRAY; |
| 676 | if (arg->arg_len > 1) { |
| 677 | dehoist(arg,2); |
| 678 | arg2 = arg[2].arg_ptr.arg_arg; |
| 679 | if (arg2->arg_type == O_SPLIT) { /* use split's builtin =?*/ |
| 680 | spat = arg2[2].arg_ptr.arg_spat; |
| afd9f252 |
681 | if (!(spat->spat_flags & SPAT_ONCE) && |
| a687059c |
682 | nothing_in_common(arg1,spat->spat_repl)) { |
| 683 | spat->spat_repl[1].arg_ptr.arg_stab = |
| 684 | arg1[1].arg_ptr.arg_stab; |
| afd9f252 |
685 | spat->spat_flags |= SPAT_ONCE; |
| a687059c |
686 | arg_free(arg1); /* recursive */ |
| 687 | free_arg(arg); /* non-recursive */ |
| 688 | return arg2; /* split has builtin assign */ |
| 689 | } |
| 690 | } |
| 691 | else if (nothing_in_common(arg1,arg2)) |
| 692 | arg->arg_flags &= ~AF_COMMON; |
| 693 | if (arg->arg_type == O_ASSIGN) { |
| 694 | arg[1].arg_flags |= AF_ARYOK; |
| 695 | arg[2].arg_flags |= AF_ARYOK; |
| 696 | } |
| 697 | } |
| bf38876a |
698 | else if (arg->arg_type == O_ASSIGN) |
| 699 | arg[1].arg_flags |= AF_ARYOK; |
| a687059c |
700 | } |
| 701 | else if (arg1->arg_type == O_HELEM || arg1->arg_type == O_LHELEM) |
| 0d3e774c |
702 | if (arg->arg_type == O_DEFINED) |
| 703 | arg1->arg_type = O_HELEM; /* avoid creating one */ |
| 704 | else |
| 705 | arg1->arg_type = O_LHELEM; |
| a687059c |
706 | else if (arg1->arg_type == O_HASH || arg1->arg_type == O_LHASH) { |
| 707 | arg1->arg_type = O_LHASH; |
| 708 | if (arg->arg_len > 1) { |
| 709 | dehoist(arg,2); |
| 710 | arg2 = arg[2].arg_ptr.arg_arg; |
| 711 | if (nothing_in_common(arg1,arg2)) |
| 712 | arg->arg_flags &= ~AF_COMMON; |
| 713 | if (arg->arg_type == O_ASSIGN) { |
| 714 | arg[1].arg_flags |= AF_ARYOK; |
| 715 | arg[2].arg_flags |= AF_ARYOK; |
| 716 | } |
| 717 | } |
| bf38876a |
718 | else if (arg->arg_type == O_ASSIGN) |
| 719 | arg[1].arg_flags |= AF_ARYOK; |
| a687059c |
720 | } |
| 721 | else if (arg1->arg_type == O_ASLICE) { |
| 722 | arg1->arg_type = O_LASLICE; |
| 723 | if (arg->arg_type == O_ASSIGN) { |
| 724 | arg[1].arg_flags |= AF_ARYOK; |
| 725 | arg[2].arg_flags |= AF_ARYOK; |
| 726 | } |
| 727 | } |
| 728 | else if (arg1->arg_type == O_HSLICE) { |
| 729 | arg1->arg_type = O_LHSLICE; |
| 730 | if (arg->arg_type == O_ASSIGN) { |
| 731 | arg[1].arg_flags |= AF_ARYOK; |
| 732 | arg[2].arg_flags |= AF_ARYOK; |
| 733 | } |
| 734 | } |
| 735 | else if ((arg->arg_type == O_DEFINED || arg->arg_type == O_UNDEF) && |
| 736 | (arg1->arg_type == (perldb ? O_DBSUBR : O_SUBR)) ) { |
| 737 | arg[1].arg_type |= A_DONT; |
| 738 | } |
| 739 | else if (arg1->arg_type == O_SUBSTR || arg1->arg_type == O_VEC) { |
| 740 | (void)l(arg1); |
| 741 | Renewc(arg1->arg_ptr.arg_str, 1, struct lstring, STR); |
| 742 | /* grow string struct to hold an lstring struct */ |
| 743 | } |
| 744 | else if (arg1->arg_type == O_ASSIGN) { |
| 745 | if (arg->arg_type == O_CHOP) |
| 746 | arg[1].arg_flags &= ~AF_ARYOK; /* grandfather chop idiom */ |
| 747 | } |
| 748 | else { |
| 749 | (void)sprintf(tokenbuf, |
| 750 | "Illegal expression (%s) as lvalue",opname[arg1->arg_type]); |
| 751 | yyerror(tokenbuf); |
| 752 | } |
| 753 | arg[1].arg_type = A_LEXPR | (arg[1].arg_type & A_DONT); |
| 754 | if (arg->arg_type == O_ASSIGN && (arg1[1].arg_flags & AF_ARYOK)) { |
| 755 | arg[1].arg_flags |= AF_ARYOK; |
| 756 | if (arg->arg_len > 1) |
| 757 | arg[2].arg_flags |= AF_ARYOK; |
| 758 | } |
| 759 | #ifdef DEBUGGING |
| 760 | if (debug & 16) |
| 761 | fprintf(stderr,"lval LEXPR\n"); |
| 762 | #endif |
| 763 | return arg; |
| 764 | } |
| 765 | if (i == A_STAR || i == A_LSTAR) { |
| 766 | arg[1].arg_type = A_LSTAR | (arg[1].arg_type & A_DONT); |
| 767 | return arg; |
| 768 | } |
| 769 | |
| 770 | /* not an array reference, should be a register name */ |
| 771 | |
| 772 | if (i != A_STAB && i != A_LVAL) { |
| 773 | (void)sprintf(tokenbuf, |
| 774 | "Illegal item (%s) as lvalue",argname[arg[1].arg_type&A_MASK]); |
| 775 | yyerror(tokenbuf); |
| 776 | } |
| 777 | arg[1].arg_type = A_LVAL | (arg[1].arg_type & A_DONT); |
| 778 | #ifdef DEBUGGING |
| 779 | if (debug & 16) |
| 780 | fprintf(stderr,"lval LVAL\n"); |
| 781 | #endif |
| 782 | return arg; |
| 783 | } |
| 784 | |
| 785 | ARG * |
| 786 | fixl(type,arg) |
| 787 | int type; |
| 788 | ARG *arg; |
| 789 | { |
| 790 | if (type == O_DEFINED || type == O_UNDEF) { |
| 791 | if (arg->arg_type != O_ITEM) |
| 792 | arg = hide_ary(arg); |
| 793 | if (arg->arg_type == O_ITEM) { |
| 794 | type = arg[1].arg_type & A_MASK; |
| 795 | if (type == A_EXPR || type == A_LEXPR) |
| 796 | arg[1].arg_type = A_LEXPR|A_DONT; |
| 797 | } |
| 798 | } |
| 799 | return arg; |
| 800 | } |
| 801 | |
| 802 | dehoist(arg,i) |
| 803 | ARG *arg; |
| 804 | { |
| 805 | ARG *tmparg; |
| 806 | |
| 807 | if (arg[i].arg_type != A_EXPR) { /* dehoist */ |
| 808 | tmparg = make_op(O_ITEM,1,Nullarg,Nullarg,Nullarg); |
| 809 | tmparg[1] = arg[i]; |
| 810 | arg[i].arg_ptr.arg_arg = tmparg; |
| 811 | arg[i].arg_type = A_EXPR; |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | ARG * |
| 816 | addflags(i,flags,arg) |
| 817 | register ARG *arg; |
| 818 | { |
| 819 | arg[i].arg_flags |= flags; |
| 820 | return arg; |
| 821 | } |
| 822 | |
| 823 | ARG * |
| 824 | hide_ary(arg) |
| 825 | ARG *arg; |
| 826 | { |
| 827 | if (arg->arg_type == O_ARRAY || arg->arg_type == O_HASH) |
| 828 | return make_op(O_ITEM,1,arg,Nullarg,Nullarg); |
| 829 | return arg; |
| 830 | } |
| 831 | |
| 832 | /* maybe do a join on multiple array dimensions */ |
| 833 | |
| 834 | ARG * |
| 835 | jmaybe(arg) |
| 836 | register ARG *arg; |
| 837 | { |
| 838 | if (arg && arg->arg_type == O_COMMA) { |
| 839 | arg = listish(arg); |
| 840 | arg = make_op(O_JOIN, 2, |
| 841 | stab2arg(A_STAB,stabent(";",TRUE)), |
| 842 | make_list(arg), |
| 843 | Nullarg); |
| 844 | } |
| 845 | return arg; |
| 846 | } |
| 847 | |
| 848 | ARG * |
| 849 | make_list(arg) |
| 850 | register ARG *arg; |
| 851 | { |
| 852 | register int i; |
| 853 | register ARG *node; |
| 854 | register ARG *nxtnode; |
| 855 | register int j; |
| 856 | STR *tmpstr; |
| 857 | |
| 858 | if (!arg) { |
| 859 | arg = op_new(0); |
| 860 | arg->arg_type = O_LIST; |
| 861 | } |
| 862 | if (arg->arg_type != O_COMMA) { |
| 863 | if (arg->arg_type != O_ARRAY) |
| 864 | arg->arg_flags |= AF_LISTISH; /* see listish() below */ |
| 865 | return arg; |
| 866 | } |
| 867 | for (i = 2, node = arg; ; i++) { |
| 868 | if (node->arg_len < 2) |
| 869 | break; |
| 870 | if (node[1].arg_type != A_EXPR) |
| 871 | break; |
| 872 | node = node[1].arg_ptr.arg_arg; |
| 873 | if (node->arg_type != O_COMMA) |
| 874 | break; |
| 875 | } |
| 876 | if (i > 2) { |
| 877 | node = arg; |
| 878 | arg = op_new(i); |
| 879 | tmpstr = arg->arg_ptr.arg_str; |
| 880 | #ifdef STRUCTCOPY |
| 881 | *arg = *node; /* copy everything except the STR */ |
| 882 | #else |
| 883 | (void)bcopy((char *)node, (char *)arg, sizeof(ARG)); |
| 884 | #endif |
| 885 | arg->arg_ptr.arg_str = tmpstr; |
| 886 | for (j = i; ; ) { |
| 887 | #ifdef STRUCTCOPY |
| 888 | arg[j] = node[2]; |
| 889 | #else |
| 890 | (void)bcopy((char *)(node+2), (char *)(arg+j), sizeof(ARG)); |
| 891 | #endif |
| 892 | arg[j].arg_flags |= AF_ARYOK; |
| 893 | --j; /* Bug in Xenix compiler */ |
| 894 | if (j < 2) { |
| 895 | #ifdef STRUCTCOPY |
| 896 | arg[1] = node[1]; |
| 897 | #else |
| 898 | (void)bcopy((char *)(node+1), (char *)(arg+1), sizeof(ARG)); |
| 899 | #endif |
| 900 | free_arg(node); |
| 901 | break; |
| 902 | } |
| 903 | nxtnode = node[1].arg_ptr.arg_arg; |
| 904 | free_arg(node); |
| 905 | node = nxtnode; |
| 906 | } |
| 907 | } |
| 908 | arg[1].arg_flags |= AF_ARYOK; |
| 909 | arg[2].arg_flags |= AF_ARYOK; |
| 910 | arg->arg_type = O_LIST; |
| 911 | arg->arg_len = i; |
| 912 | return arg; |
| 913 | } |
| 914 | |
| 915 | /* turn a single item into a list */ |
| 916 | |
| 917 | ARG * |
| 918 | listish(arg) |
| 919 | ARG *arg; |
| 920 | { |
| 921 | if (arg->arg_flags & AF_LISTISH) |
| 922 | arg = make_op(O_LIST,1,arg,Nullarg,Nullarg); |
| 923 | return arg; |
| 924 | } |
| 925 | |
| 926 | ARG * |
| 927 | maybelistish(optype, arg) |
| 928 | int optype; |
| 929 | ARG *arg; |
| 930 | { |
| ff2452de |
931 | ARG *tmparg = arg; |
| 932 | |
| 933 | if (optype == O_RETURN && arg->arg_type == O_ITEM && |
| 934 | arg[1].arg_type == A_EXPR && (tmparg = arg[1].arg_ptr.arg_arg) && |
| 935 | ((tmparg->arg_flags & AF_LISTISH) || (tmparg->arg_type == O_ARRAY) )) { |
| 936 | tmparg = listish(tmparg); |
| 937 | free_arg(arg); |
| 938 | arg = tmparg; |
| 939 | } |
| 940 | else if (optype == O_PRTF || |
| a687059c |
941 | (arg->arg_type == O_ASLICE || arg->arg_type == O_HSLICE || |
| 942 | arg->arg_type == O_F_OR_R) ) |
| 943 | arg = listish(arg); |
| 944 | return arg; |
| 945 | } |
| 946 | |
| 947 | /* mark list of local variables */ |
| 948 | |
| 949 | ARG * |
| 950 | localize(arg) |
| 951 | ARG *arg; |
| 952 | { |
| 953 | arg->arg_flags |= AF_LOCAL; |
| 954 | return arg; |
| 955 | } |
| 956 | |
| 957 | ARG * |
| a687059c |
958 | rcatmaybe(arg) |
| 959 | ARG *arg; |
| 960 | { |
| 961 | if (arg->arg_type == O_CONCAT && arg[2].arg_type == A_READ) { |
| 962 | arg->arg_type = O_RCAT; |
| 963 | arg[2].arg_type = arg[2].arg_ptr.arg_arg[1].arg_type; |
| 964 | arg[2].arg_ptr = arg[2].arg_ptr.arg_arg[1].arg_ptr; |
| 965 | free_arg(arg[2].arg_ptr.arg_arg); |
| 966 | } |
| 967 | return arg; |
| 968 | } |
| 969 | |
| 970 | ARG * |
| 971 | stab2arg(atype,stab) |
| 972 | int atype; |
| 973 | register STAB *stab; |
| 974 | { |
| 975 | register ARG *arg; |
| 976 | |
| 977 | arg = op_new(1); |
| 978 | arg->arg_type = O_ITEM; |
| 979 | arg[1].arg_type = atype; |
| 980 | arg[1].arg_ptr.arg_stab = stab; |
| 981 | return arg; |
| 982 | } |
| 983 | |
| 984 | ARG * |
| 985 | cval_to_arg(cval) |
| 986 | register char *cval; |
| 987 | { |
| 988 | register ARG *arg; |
| 989 | |
| 990 | arg = op_new(1); |
| 991 | arg->arg_type = O_ITEM; |
| 992 | arg[1].arg_type = A_SINGLE; |
| 993 | arg[1].arg_ptr.arg_str = str_make(cval,0); |
| 994 | Safefree(cval); |
| 995 | return arg; |
| 996 | } |
| 997 | |
| 998 | ARG * |
| 999 | op_new(numargs) |
| 1000 | int numargs; |
| 1001 | { |
| 1002 | register ARG *arg; |
| 1003 | |
| 1004 | Newz(203,arg, numargs + 1, ARG); |
| 1005 | arg->arg_ptr.arg_str = Str_new(21,0); |
| 1006 | arg->arg_len = numargs; |
| 1007 | return arg; |
| 1008 | } |
| 1009 | |
| 1010 | void |
| 1011 | free_arg(arg) |
| 1012 | ARG *arg; |
| 1013 | { |
| 1014 | str_free(arg->arg_ptr.arg_str); |
| 1015 | Safefree(arg); |
| 1016 | } |
| 1017 | |
| 1018 | ARG * |
| 1019 | make_match(type,expr,spat) |
| 1020 | int type; |
| 1021 | ARG *expr; |
| 1022 | SPAT *spat; |
| 1023 | { |
| 1024 | register ARG *arg; |
| 1025 | |
| 1026 | arg = make_op(type,2,expr,Nullarg,Nullarg); |
| 1027 | |
| 1028 | arg[2].arg_type = A_SPAT|A_DONT; |
| 1029 | arg[2].arg_ptr.arg_spat = spat; |
| 1030 | #ifdef DEBUGGING |
| 1031 | if (debug & 16) |
| 1032 | fprintf(stderr,"make_match SPAT=%lx\n",(long)spat); |
| 1033 | #endif |
| 1034 | |
| 1035 | if (type == O_SUBST || type == O_NSUBST) { |
| 1036 | if (arg[1].arg_type != A_STAB) { |
| 1037 | yyerror("Illegal lvalue"); |
| 1038 | } |
| 1039 | arg[1].arg_type = A_LVAL; |
| 1040 | } |
| 1041 | return arg; |
| 1042 | } |
| 1043 | |
| 1044 | ARG * |
| 1045 | cmd_to_arg(cmd) |
| 1046 | CMD *cmd; |
| 1047 | { |
| 1048 | register ARG *arg; |
| 1049 | |
| 1050 | arg = op_new(1); |
| 1051 | arg->arg_type = O_ITEM; |
| 1052 | arg[1].arg_type = A_CMD; |
| 1053 | arg[1].arg_ptr.arg_cmd = cmd; |
| 1054 | return arg; |
| 1055 | } |
| 1056 | |
| 1057 | /* Check two expressions to see if there is any identifier in common */ |
| 1058 | |
| 1059 | static int |
| 1060 | nothing_in_common(arg1,arg2) |
| 1061 | ARG *arg1; |
| 1062 | ARG *arg2; |
| 1063 | { |
| 1064 | static int thisexpr = 0; /* I don't care if this wraps */ |
| 1065 | |
| 1066 | thisexpr++; |
| 1067 | if (arg_common(arg1,thisexpr,1)) |
| 1068 | return 0; /* hit eval or do {} */ |
| 1069 | if (arg_common(arg2,thisexpr,0)) |
| 1070 | return 0; /* hit identifier again */ |
| 1071 | return 1; |
| 1072 | } |
| 1073 | |
| 1074 | /* Recursively descend an expression and mark any identifier or check |
| 1075 | * it to see if it was marked already. |
| 1076 | */ |
| 1077 | |
| 1078 | static int |
| 1079 | arg_common(arg,exprnum,marking) |
| 1080 | register ARG *arg; |
| 1081 | int exprnum; |
| 1082 | int marking; |
| 1083 | { |
| 1084 | register int i; |
| 1085 | |
| 1086 | if (!arg) |
| 1087 | return 0; |
| 1088 | for (i = arg->arg_len; i >= 1; i--) { |
| 1089 | switch (arg[i].arg_type & A_MASK) { |
| 1090 | case A_NULL: |
| 1091 | break; |
| 1092 | case A_LEXPR: |
| 1093 | case A_EXPR: |
| 1094 | if (arg_common(arg[i].arg_ptr.arg_arg,exprnum,marking)) |
| 1095 | return 1; |
| 1096 | break; |
| 1097 | case A_CMD: |
| 1098 | return 1; /* assume hanky panky */ |
| 1099 | case A_STAR: |
| 1100 | case A_LSTAR: |
| 1101 | case A_STAB: |
| 1102 | case A_LVAL: |
| 1103 | case A_ARYLEN: |
| 1104 | case A_LARYLEN: |
| 1105 | if (marking) |
| 1106 | stab_lastexpr(arg[i].arg_ptr.arg_stab) = exprnum; |
| 1107 | else if (stab_lastexpr(arg[i].arg_ptr.arg_stab) == exprnum) |
| 1108 | return 1; |
| 1109 | break; |
| 1110 | case A_DOUBLE: |
| 1111 | case A_BACKTICK: |
| 1112 | { |
| 1113 | register char *s = arg[i].arg_ptr.arg_str->str_ptr; |
| 1114 | register char *send = s + arg[i].arg_ptr.arg_str->str_cur; |
| 1115 | register STAB *stab; |
| 1116 | |
| 1117 | while (*s) { |
| 1118 | if (*s == '$' && s[1]) { |
| 1119 | s = scanreg(s,send,tokenbuf); |
| 1120 | stab = stabent(tokenbuf,TRUE); |
| 1121 | if (marking) |
| 1122 | stab_lastexpr(stab) = exprnum; |
| 1123 | else if (stab_lastexpr(stab) == exprnum) |
| 1124 | return 1; |
| 1125 | continue; |
| 1126 | } |
| 1127 | else if (*s == '\\' && s[1]) |
| 1128 | s++; |
| 1129 | s++; |
| 1130 | } |
| 1131 | } |
| 1132 | break; |
| 1133 | case A_SPAT: |
| 1134 | if (spat_common(arg[i].arg_ptr.arg_spat,exprnum,marking)) |
| 1135 | return 1; |
| 1136 | break; |
| 1137 | case A_READ: |
| 1138 | case A_INDREAD: |
| 1139 | case A_GLOB: |
| 1140 | case A_WORD: |
| 1141 | case A_SINGLE: |
| 1142 | break; |
| 1143 | } |
| 1144 | } |
| 1145 | switch (arg->arg_type) { |
| 1146 | case O_ARRAY: |
| 1147 | case O_LARRAY: |
| 1148 | if ((arg[1].arg_type & A_MASK) == A_STAB) |
| 1149 | (void)aadd(arg[1].arg_ptr.arg_stab); |
| 1150 | break; |
| 1151 | case O_HASH: |
| 1152 | case O_LHASH: |
| 1153 | if ((arg[1].arg_type & A_MASK) == A_STAB) |
| 1154 | (void)hadd(arg[1].arg_ptr.arg_stab); |
| 1155 | break; |
| 1156 | case O_EVAL: |
| 1157 | case O_SUBR: |
| 1158 | case O_DBSUBR: |
| 1159 | return 1; |
| 1160 | } |
| 1161 | return 0; |
| 1162 | } |
| 1163 | |
| 1164 | static int |
| 1165 | spat_common(spat,exprnum,marking) |
| 1166 | register SPAT *spat; |
| 1167 | int exprnum; |
| 1168 | int marking; |
| 1169 | { |
| 1170 | if (spat->spat_runtime) |
| 1171 | if (arg_common(spat->spat_runtime,exprnum,marking)) |
| 1172 | return 1; |
| 1173 | if (spat->spat_repl) { |
| 1174 | if (arg_common(spat->spat_repl,exprnum,marking)) |
| 1175 | return 1; |
| 1176 | } |
| 1177 | return 0; |
| 1178 | } |
projects / p5sagit/p5-mst-13.2.git / blame