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