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[perl5.git] / pp_ctl.c
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1/* pp_ctl.c
2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
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4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
8 */
9
10/*
11 * Now far ahead the Road has gone,
12 * And I must follow, if I can,
13 * Pursuing it with eager feet,
14 * Until it joins some larger way
15 * Where many paths and errands meet.
16 * And whither then? I cannot say.
17 */
18
19#include "EXTERN.h"
20#include "perl.h"
21
22#ifndef WORD_ALIGN
23#define WORD_ALIGN sizeof(U16)
24#endif
25
54310121 26#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
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27
28static OP *docatch _((OP *o));
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29static OP *doeval _((int gimme));
30static OP *dofindlabel _((OP *op, char *label, OP **opstack));
31static void doparseform _((SV *sv));
32static I32 dopoptoeval _((I32 startingblock));
33static I32 dopoptolabel _((char *label));
34static I32 dopoptoloop _((I32 startingblock));
35static I32 dopoptosub _((I32 startingblock));
36static void save_lines _((AV *array, SV *sv));
a0d0e21e 37static int sortcv _((const void *, const void *));
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38static int sortcmp _((const void *, const void *));
39static int sortcmp_locale _((const void *, const void *));
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40
41static I32 sortcxix;
42
43PP(pp_wantarray)
44{
45 dSP;
46 I32 cxix;
47 EXTEND(SP, 1);
48
49 cxix = dopoptosub(cxstack_ix);
50 if (cxix < 0)
51 RETPUSHUNDEF;
52
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PP
53 switch (cxstack[cxix].blk_gimme) {
54 case G_ARRAY:
a0d0e21e 55 RETPUSHYES;
54310121 56 case G_SCALAR:
a0d0e21e 57 RETPUSHNO;
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58 default:
59 RETPUSHUNDEF;
60 }
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61}
62
63PP(pp_regcmaybe)
64{
65 return NORMAL;
66}
67
68PP(pp_regcomp) {
69 dSP;
70 register PMOP *pm = (PMOP*)cLOGOP->op_other;
71 register char *t;
72 SV *tmpstr;
73 STRLEN len;
74
75 tmpstr = POPs;
76 t = SvPV(tmpstr, len);
77
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78 /* JMR: Check against the last compiled regexp */
79 if ( ! pm->op_pmregexp || ! pm->op_pmregexp->precomp
80 || strnNE(pm->op_pmregexp->precomp, t, len)
81 || pm->op_pmregexp->precomp[len]) {
82 if (pm->op_pmregexp) {
83 pregfree(pm->op_pmregexp);
84 pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
85 }
a0d0e21e 86
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87 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
88 pm->op_pmregexp = pregcomp(t, t + len, pm);
89 }
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90
91 if (!pm->op_pmregexp->prelen && curpm)
92 pm = curpm;
93 else if (strEQ("\\s+", pm->op_pmregexp->precomp))
94 pm->op_pmflags |= PMf_WHITE;
95
96 if (pm->op_pmflags & PMf_KEEP) {
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97 pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
98 hoistmust(pm);
99 cLOGOP->op_first->op_next = op->op_next;
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100 }
101 RETURN;
102}
103
104PP(pp_substcont)
105{
106 dSP;
107 register PMOP *pm = (PMOP*) cLOGOP->op_other;
108 register CONTEXT *cx = &cxstack[cxstack_ix];
109 register SV *dstr = cx->sb_dstr;
110 register char *s = cx->sb_s;
111 register char *m = cx->sb_m;
112 char *orig = cx->sb_orig;
c07a80fd 113 register REGEXP *rx = cx->sb_rx;
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114
115 if (cx->sb_iters++) {
116 if (cx->sb_iters > cx->sb_maxiters)
117 DIE("Substitution loop");
118
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PP
119 if (!cx->sb_rxtainted)
120 cx->sb_rxtainted = SvTAINTED(TOPs);
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121 sv_catsv(dstr, POPs);
122 if (rx->subbase)
123 Safefree(rx->subbase);
124 rx->subbase = cx->sb_subbase;
125
126 /* Are we done */
e50aee73 127 if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
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128 s == m, Nullsv, cx->sb_safebase))
129 {
130 SV *targ = cx->sb_targ;
131 sv_catpvn(dstr, s, cx->sb_strend - s);
748a9306 132
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133 TAINT_IF(cx->sb_rxtainted || rx->exec_tainted);
134
4633a7c4 135 (void)SvOOK_off(targ);
cb0b1708 136 Safefree(SvPVX(targ));
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137 SvPVX(targ) = SvPVX(dstr);
138 SvCUR_set(targ, SvCUR(dstr));
139 SvLEN_set(targ, SvLEN(dstr));
140 SvPVX(dstr) = 0;
141 sv_free(dstr);
142
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143 (void)SvPOK_only(targ);
144 SvSETMAGIC(targ);
9212bbba 145 SvTAINT(targ);
a0d0e21e 146 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
4633a7c4 147 LEAVE_SCOPE(cx->sb_oldsave);
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148 POPSUBST(cx);
149 RETURNOP(pm->op_next);
150 }
151 }
152 if (rx->subbase && rx->subbase != orig) {
153 m = s;
154 s = orig;
155 cx->sb_orig = orig = rx->subbase;
156 s = orig + (m - s);
157 cx->sb_strend = s + (cx->sb_strend - m);
158 }
159 cx->sb_m = m = rx->startp[0];
160 sv_catpvn(dstr, s, m-s);
161 cx->sb_s = rx->endp[0];
162 cx->sb_subbase = rx->subbase;
71be2cbc 163 cx->sb_rxtainted |= rx->exec_tainted;
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164
165 rx->subbase = Nullch; /* so recursion works */
166 RETURNOP(pm->op_pmreplstart);
167}
168
169PP(pp_formline)
170{
171 dSP; dMARK; dORIGMARK;
172 register SV *form = *++MARK;
173 register U16 *fpc;
174 register char *t;
175 register char *f;
176 register char *s;
177 register char *send;
178 register I32 arg;
179 register SV *sv;
180 char *item;
181 I32 itemsize;
182 I32 fieldsize;
183 I32 lines = 0;
184 bool chopspace = (strchr(chopset, ' ') != Nullch);
185 char *chophere;
186 char *linemark;
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187 double value;
188 bool gotsome;
189 STRLEN len;
190
55497cff 191 if (!SvMAGICAL(form) || !SvCOMPILED(form)) {
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192 SvREADONLY_off(form);
193 doparseform(form);
194 }
195
196 SvPV_force(formtarget, len);
197 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
198 t += len;
199 f = SvPV(form, len);
200 /* need to jump to the next word */
201 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
202
203 fpc = (U16*)s;
204
205 for (;;) {
206 DEBUG_f( {
207 char *name = "???";
208 arg = -1;
209 switch (*fpc) {
210 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
211 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
212 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
213 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
214 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
215
216 case FF_CHECKNL: name = "CHECKNL"; break;
217 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
218 case FF_SPACE: name = "SPACE"; break;
219 case FF_HALFSPACE: name = "HALFSPACE"; break;
220 case FF_ITEM: name = "ITEM"; break;
221 case FF_CHOP: name = "CHOP"; break;
222 case FF_LINEGLOB: name = "LINEGLOB"; break;
223 case FF_NEWLINE: name = "NEWLINE"; break;
224 case FF_MORE: name = "MORE"; break;
225 case FF_LINEMARK: name = "LINEMARK"; break;
226 case FF_END: name = "END"; break;
227 }
228 if (arg >= 0)
760ac839 229 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
a0d0e21e 230 else
760ac839 231 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
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232 } )
233 switch (*fpc++) {
234 case FF_LINEMARK:
235 linemark = t;
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236 lines++;
237 gotsome = FALSE;
238 break;
239
240 case FF_LITERAL:
241 arg = *fpc++;
242 while (arg--)
243 *t++ = *f++;
244 break;
245
246 case FF_SKIP:
247 f += *fpc++;
248 break;
249
250 case FF_FETCH:
251 arg = *fpc++;
252 f += arg;
253 fieldsize = arg;
254
255 if (MARK < SP)
256 sv = *++MARK;
257 else {
258 sv = &sv_no;
259 if (dowarn)
260 warn("Not enough format arguments");
261 }
262 break;
263
264 case FF_CHECKNL:
265 item = s = SvPV(sv, len);
266 itemsize = len;
267 if (itemsize > fieldsize)
268 itemsize = fieldsize;
269 send = chophere = s + itemsize;
270 while (s < send) {
271 if (*s & ~31)
272 gotsome = TRUE;
273 else if (*s == '\n')
274 break;
275 s++;
276 }
277 itemsize = s - item;
278 break;
279
280 case FF_CHECKCHOP:
281 item = s = SvPV(sv, len);
282 itemsize = len;
283 if (itemsize <= fieldsize) {
284 send = chophere = s + itemsize;
285 while (s < send) {
286 if (*s == '\r') {
287 itemsize = s - item;
288 break;
289 }
290 if (*s++ & ~31)
291 gotsome = TRUE;
292 }
293 }
294 else {
295 itemsize = fieldsize;
296 send = chophere = s + itemsize;
297 while (s < send || (s == send && isSPACE(*s))) {
298 if (isSPACE(*s)) {
299 if (chopspace)
300 chophere = s;
301 if (*s == '\r')
302 break;
303 }
304 else {
305 if (*s & ~31)
306 gotsome = TRUE;
307 if (strchr(chopset, *s))
308 chophere = s + 1;
309 }
310 s++;
311 }
312 itemsize = chophere - item;
313 }
314 break;
315
316 case FF_SPACE:
317 arg = fieldsize - itemsize;
318 if (arg) {
319 fieldsize -= arg;
320 while (arg-- > 0)
321 *t++ = ' ';
322 }
323 break;
324
325 case FF_HALFSPACE:
326 arg = fieldsize - itemsize;
327 if (arg) {
328 arg /= 2;
329 fieldsize -= arg;
330 while (arg-- > 0)
331 *t++ = ' ';
332 }
333 break;
334
335 case FF_ITEM:
336 arg = itemsize;
337 s = item;
338 while (arg--) {
339#if 'z' - 'a' != 25
340 int ch = *t++ = *s++;
341 if (!iscntrl(ch))
342 t[-1] = ' ';
343#else
344 if ( !((*t++ = *s++) & ~31) )
345 t[-1] = ' ';
346#endif
347
348 }
349 break;
350
351 case FF_CHOP:
352 s = chophere;
353 if (chopspace) {
354 while (*s && isSPACE(*s))
355 s++;
356 }
357 sv_chop(sv,s);
358 break;
359
360 case FF_LINEGLOB:
361 item = s = SvPV(sv, len);
362 itemsize = len;
363 if (itemsize) {
364 gotsome = TRUE;
365 send = s + itemsize;
366 while (s < send) {
367 if (*s++ == '\n') {
368 if (s == send)
369 itemsize--;
370 else
371 lines++;
372 }
373 }
374 SvCUR_set(formtarget, t - SvPVX(formtarget));
375 sv_catpvn(formtarget, item, itemsize);
376 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
377 t = SvPVX(formtarget) + SvCUR(formtarget);
378 }
379 break;
380
381 case FF_DECIMAL:
382 /* If the field is marked with ^ and the value is undefined,
383 blank it out. */
384 arg = *fpc++;
385 if ((arg & 512) && !SvOK(sv)) {
386 arg = fieldsize;
387 while (arg--)
388 *t++ = ' ';
389 break;
390 }
391 gotsome = TRUE;
392 value = SvNV(sv);
bbce6d69 393 /* Formats aren't yet marked for locales, so assume "yes". */
36477c24 394 SET_NUMERIC_LOCAL();
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395 if (arg & 256) {
396 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
397 } else {
398 sprintf(t, "%*.0f", (int) fieldsize, value);
399 }
400 t += fieldsize;
401 break;
402
403 case FF_NEWLINE:
404 f++;
405 while (t-- > linemark && *t == ' ') ;
406 t++;
407 *t++ = '\n';
408 break;
409
410 case FF_BLANK:
411 arg = *fpc++;
412 if (gotsome) {
413 if (arg) { /* repeat until fields exhausted? */
414 *t = '\0';
415 SvCUR_set(formtarget, t - SvPVX(formtarget));
416 lines += FmLINES(formtarget);
417 if (lines == 200) {
418 arg = t - linemark;
419 if (strnEQ(linemark, linemark - arg, arg))
420 DIE("Runaway format");
421 }
422 FmLINES(formtarget) = lines;
423 SP = ORIGMARK;
424 RETURNOP(cLISTOP->op_first);
425 }
426 }
427 else {
428 t = linemark;
429 lines--;
430 }
431 break;
432
433 case FF_MORE:
434 if (itemsize) {
435 arg = fieldsize - itemsize;
436 if (arg) {
437 fieldsize -= arg;
438 while (arg-- > 0)
439 *t++ = ' ';
440 }
441 s = t - 3;
442 if (strnEQ(s," ",3)) {
443 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
444 s--;
445 }
446 *s++ = '.';
447 *s++ = '.';
448 *s++ = '.';
449 }
450 break;
451
452 case FF_END:
453 *t = '\0';
454 SvCUR_set(formtarget, t - SvPVX(formtarget));
455 FmLINES(formtarget) += lines;
456 SP = ORIGMARK;
457 RETPUSHYES;
458 }
459 }
460}
461
462PP(pp_grepstart)
463{
464 dSP;
465 SV *src;
466
467 if (stack_base + *markstack_ptr == sp) {
468 (void)POPMARK;
54310121 469 if (GIMME_V == G_SCALAR)
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470 XPUSHs(&sv_no);
471 RETURNOP(op->op_next->op_next);
472 }
473 stack_sp = stack_base + *markstack_ptr + 1;
474 pp_pushmark(); /* push dst */
475 pp_pushmark(); /* push src */
476 ENTER; /* enter outer scope */
477
478 SAVETMPS;
479 SAVESPTR(GvSV(defgv));
480
481 ENTER; /* enter inner scope */
482 SAVESPTR(curpm);
483
484 src = stack_base[*markstack_ptr];
485 SvTEMP_off(src);
486 GvSV(defgv) = src;
487
488 PUTBACK;
489 if (op->op_type == OP_MAPSTART)
490 pp_pushmark(); /* push top */
491 return ((LOGOP*)op->op_next)->op_other;
492}
493
494PP(pp_mapstart)
495{
496 DIE("panic: mapstart"); /* uses grepstart */
497}
498
499PP(pp_mapwhile)
500{
501 dSP;
502 I32 diff = (sp - stack_base) - *markstack_ptr;
503 I32 count;
504 I32 shift;
505 SV** src;
506 SV** dst;
507
508 ++markstack_ptr[-1];
509 if (diff) {
510 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
511 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
512 count = (sp - stack_base) - markstack_ptr[-1] + 2;
513
514 EXTEND(sp,shift);
515 src = sp;
516 dst = (sp += shift);
517 markstack_ptr[-1] += shift;
518 *markstack_ptr += shift;
519 while (--count)
520 *dst-- = *src--;
521 }
522 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
523 ++diff;
524 while (--diff)
525 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
526 }
527 LEAVE; /* exit inner scope */
528
529 /* All done yet? */
530 if (markstack_ptr[-1] > *markstack_ptr) {
531 I32 items;
54310121 532 I32 gimme = GIMME_V;
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533
534 (void)POPMARK; /* pop top */
535 LEAVE; /* exit outer scope */
536 (void)POPMARK; /* pop src */
537 items = --*markstack_ptr - markstack_ptr[-1];
538 (void)POPMARK; /* pop dst */
539 SP = stack_base + POPMARK; /* pop original mark */
54310121 540 if (gimme == G_SCALAR) {
a0d0e21e
LW
541 dTARGET;
542 XPUSHi(items);
a0d0e21e 543 }
54310121
PP
544 else if (gimme == G_ARRAY)
545 SP += items;
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LW
546 RETURN;
547 }
548 else {
549 SV *src;
550
551 ENTER; /* enter inner scope */
552 SAVESPTR(curpm);
553
554 src = stack_base[markstack_ptr[-1]];
555 SvTEMP_off(src);
556 GvSV(defgv) = src;
557
558 RETURNOP(cLOGOP->op_other);
559 }
560}
561
562
563PP(pp_sort)
564{
565 dSP; dMARK; dORIGMARK;
566 register SV **up;
567 SV **myorigmark = ORIGMARK;
568 register I32 max;
569 HV *stash;
570 GV *gv;
571 CV *cv;
572 I32 gimme = GIMME;
573 OP* nextop = op->op_next;
574
575 if (gimme != G_ARRAY) {
576 SP = MARK;
577 RETPUSHUNDEF;
578 }
579
580 if (op->op_flags & OPf_STACKED) {
581 ENTER;
582 if (op->op_flags & OPf_SPECIAL) {
583 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
584 kid = kUNOP->op_first; /* pass rv2gv */
585 kid = kUNOP->op_first; /* pass leave */
586 sortcop = kid->op_next;
587 stash = curcop->cop_stash;
588 }
589 else {
590 cv = sv_2cv(*++MARK, &stash, &gv, 0);
591 if (!(cv && CvROOT(cv))) {
592 if (gv) {
593 SV *tmpstr = sv_newmortal();
e5cf08de 594 gv_efullname3(tmpstr, gv, Nullch);
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LW
595 if (cv && CvXSUB(cv))
596 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
597 DIE("Undefined sort subroutine \"%s\" called",
598 SvPVX(tmpstr));
599 }
600 if (cv) {
601 if (CvXSUB(cv))
602 DIE("Xsub called in sort");
603 DIE("Undefined subroutine in sort");
604 }
605 DIE("Not a CODE reference in sort");
606 }
607 sortcop = CvSTART(cv);
608 SAVESPTR(CvROOT(cv)->op_ppaddr);
609 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
610
611 SAVESPTR(curpad);
612 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
613 }
614 }
615 else {
616 sortcop = Nullop;
617 stash = curcop->cop_stash;
618 }
619
620 up = myorigmark + 1;
621 while (MARK < SP) { /* This may or may not shift down one here. */
622 /*SUPPRESS 560*/
623 if (*up = *++MARK) { /* Weed out nulls. */
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624 SvTEMP_off(*up);
625 if (!sortcop && !SvPOK(*up))
a0d0e21e 626 (void)sv_2pv(*up, &na);
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627 up++;
628 }
629 }
630 max = --up - myorigmark;
631 if (sortcop) {
632 if (max > 1) {
633 AV *oldstack;
634 CONTEXT *cx;
635 SV** newsp;
54310121 636 bool oldcatch = CATCH_GET;
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637
638 SAVETMPS;
639 SAVESPTR(op);
640
1ce6579f 641 oldstack = curstack;
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642 if (!sortstack) {
643 sortstack = newAV();
644 AvREAL_off(sortstack);
645 av_extend(sortstack, 32);
646 }
54310121 647 CATCH_SET(TRUE);
1ce6579f 648 SWITCHSTACK(curstack, sortstack);
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LW
649 if (sortstash != stash) {
650 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
651 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
652 sortstash = stash;
653 }
654
655 SAVESPTR(GvSV(firstgv));
656 SAVESPTR(GvSV(secondgv));
0a753a76 657 PUSHBLOCK(cx, CXt_NULL, stack_base);
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LW
658 sortcxix = cxstack_ix;
659
660 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
661
662 POPBLOCK(cx,curpm);
663 SWITCHSTACK(sortstack, oldstack);
54310121 664 CATCH_SET(oldcatch);
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665 }
666 LEAVE;
667 }
668 else {
669 if (max > 1) {
670 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
bbce6d69
PP
671 qsort((char*)(ORIGMARK+1), max, sizeof(SV*),
672 (op->op_private & OPpLOCALE) ? sortcmp_locale : sortcmp);
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LW
673 }
674 }
675 stack_sp = ORIGMARK + max;
676 return nextop;
677}
678
679/* Range stuff. */
680
681PP(pp_range)
682{
683 if (GIMME == G_ARRAY)
684 return cCONDOP->op_true;
685 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
686}
687
688PP(pp_flip)
689{
690 dSP;
691
692 if (GIMME == G_ARRAY) {
693 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
694 }
695 else {
696 dTOPss;
697 SV *targ = PAD_SV(op->op_targ);
698
699 if ((op->op_private & OPpFLIP_LINENUM)
700 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
701 : SvTRUE(sv) ) {
702 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
703 if (op->op_flags & OPf_SPECIAL) {
704 sv_setiv(targ, 1);
705 RETURN;
706 }
707 else {
708 sv_setiv(targ, 0);
709 sp--;
710 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
711 }
712 }
713 sv_setpv(TARG, "");
714 SETs(targ);
715 RETURN;
716 }
717}
718
719PP(pp_flop)
720{
721 dSP;
722
723 if (GIMME == G_ARRAY) {
724 dPOPPOPssrl;
725 register I32 i;
726 register SV *sv;
727 I32 max;
728
4633a7c4 729 if (SvNIOKp(left) || !SvPOKp(left) ||
bbce6d69
PP
730 (looks_like_number(left) && *SvPVX(left) != '0') )
731 {
a0d0e21e
LW
732 i = SvIV(left);
733 max = SvIV(right);
bbce6d69
PP
734 if (max >= i) {
735 EXTEND_MORTAL(max - i + 1);
a0d0e21e 736 EXTEND(SP, max - i + 1);
bbce6d69 737 }
a0d0e21e 738 while (i <= max) {
bbce6d69 739 sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
740 PUSHs(sv);
741 }
742 }
743 else {
744 SV *final = sv_mortalcopy(right);
745 STRLEN len;
746 char *tmps = SvPV(final, len);
747
748 sv = sv_mortalcopy(left);
4633a7c4 749 while (!SvNIOKp(sv) && SvCUR(sv) <= len &&
a0d0e21e
LW
750 strNE(SvPVX(sv),tmps) ) {
751 XPUSHs(sv);
752 sv = sv_2mortal(newSVsv(sv));
753 sv_inc(sv);
754 }
755 if (strEQ(SvPVX(sv),tmps))
756 XPUSHs(sv);
757 }
758 }
759 else {
760 dTOPss;
761 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
762 sv_inc(targ);
763 if ((op->op_private & OPpFLIP_LINENUM)
764 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
765 : SvTRUE(sv) ) {
766 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
767 sv_catpv(targ, "E0");
768 }
769 SETs(targ);
770 }
771
772 RETURN;
773}
774
775/* Control. */
776
777static I32
778dopoptolabel(label)
779char *label;
780{
781 register I32 i;
782 register CONTEXT *cx;
783
784 for (i = cxstack_ix; i >= 0; i--) {
785 cx = &cxstack[i];
786 switch (cx->cx_type) {
787 case CXt_SUBST:
788 if (dowarn)
789 warn("Exiting substitution via %s", op_name[op->op_type]);
790 break;
791 case CXt_SUB:
792 if (dowarn)
793 warn("Exiting subroutine via %s", op_name[op->op_type]);
794 break;
795 case CXt_EVAL:
796 if (dowarn)
797 warn("Exiting eval via %s", op_name[op->op_type]);
798 break;
0a753a76
PP
799 case CXt_NULL:
800 if (dowarn)
801 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
802 return -1;
a0d0e21e
LW
803 case CXt_LOOP:
804 if (!cx->blk_loop.label ||
805 strNE(label, cx->blk_loop.label) ) {
68dc0745
PP
806 DEBUG_l(deb("(Skipping label #%ld %s)\n",
807 (long)i, cx->blk_loop.label));
a0d0e21e
LW
808 continue;
809 }
68dc0745 810 DEBUG_l( deb("(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
811 return i;
812 }
813 }
814 return i;
815}
816
e50aee73
AD
817I32
818dowantarray()
819{
54310121
PP
820 I32 gimme = block_gimme();
821 return (gimme == G_VOID) ? G_SCALAR : gimme;
822}
823
824I32
825block_gimme()
826{
e50aee73
AD
827 I32 cxix;
828
829 cxix = dopoptosub(cxstack_ix);
830 if (cxix < 0)
831 return G_SCALAR;
832
54310121
PP
833 switch (cxstack[cxix].blk_gimme) {
834 case G_VOID:
835 return G_VOID;
836 case G_SCALAR:
e50aee73 837 return G_SCALAR;
54310121
PP
838 case G_ARRAY:
839 return G_ARRAY;
840 default:
841 croak("panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
842 }
e50aee73
AD
843}
844
a0d0e21e
LW
845static I32
846dopoptosub(startingblock)
847I32 startingblock;
848{
849 I32 i;
850 register CONTEXT *cx;
851 for (i = startingblock; i >= 0; i--) {
852 cx = &cxstack[i];
853 switch (cx->cx_type) {
854 default:
855 continue;
856 case CXt_EVAL:
857 case CXt_SUB:
68dc0745 858 DEBUG_l( deb("(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
859 return i;
860 }
861 }
862 return i;
863}
864
865static I32
866dopoptoeval(startingblock)
867I32 startingblock;
868{
869 I32 i;
870 register CONTEXT *cx;
871 for (i = startingblock; i >= 0; i--) {
872 cx = &cxstack[i];
873 switch (cx->cx_type) {
874 default:
875 continue;
876 case CXt_EVAL:
68dc0745 877 DEBUG_l( deb("(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
878 return i;
879 }
880 }
881 return i;
882}
883
884static I32
885dopoptoloop(startingblock)
886I32 startingblock;
887{
888 I32 i;
889 register CONTEXT *cx;
890 for (i = startingblock; i >= 0; i--) {
891 cx = &cxstack[i];
892 switch (cx->cx_type) {
893 case CXt_SUBST:
894 if (dowarn)
5f05dabc 895 warn("Exiting substitution via %s", op_name[op->op_type]);
a0d0e21e
LW
896 break;
897 case CXt_SUB:
898 if (dowarn)
899 warn("Exiting subroutine via %s", op_name[op->op_type]);
900 break;
901 case CXt_EVAL:
902 if (dowarn)
903 warn("Exiting eval via %s", op_name[op->op_type]);
904 break;
0a753a76
PP
905 case CXt_NULL:
906 if (dowarn)
907 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
908 return -1;
a0d0e21e 909 case CXt_LOOP:
68dc0745 910 DEBUG_l( deb("(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
911 return i;
912 }
913 }
914 return i;
915}
916
917void
918dounwind(cxix)
919I32 cxix;
920{
921 register CONTEXT *cx;
922 SV **newsp;
923 I32 optype;
924
925 while (cxstack_ix > cxix) {
926 cx = &cxstack[cxstack_ix--];
760ac839 927 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
a0d0e21e
LW
928 block_type[cx->cx_type]));
929 /* Note: we don't need to restore the base context info till the end. */
930 switch (cx->cx_type) {
931 case CXt_SUB:
932 POPSUB(cx);
933 break;
934 case CXt_EVAL:
935 POPEVAL(cx);
936 break;
937 case CXt_LOOP:
938 POPLOOP(cx);
939 break;
0a753a76 940 case CXt_NULL:
a0d0e21e
LW
941 case CXt_SUBST:
942 break;
943 }
944 }
945}
946
a0d0e21e
LW
947OP *
948die_where(message)
949char *message;
950{
951 if (in_eval) {
952 I32 cxix;
953 register CONTEXT *cx;
954 I32 gimme;
955 SV **newsp;
956
4633a7c4
LW
957 if (in_eval & 4) {
958 SV **svp;
959 STRLEN klen = strlen(message);
960
961 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
962 if (svp) {
963 if (!SvIOK(*svp)) {
964 static char prefix[] = "\t(in cleanup) ";
965 sv_upgrade(*svp, SVt_IV);
966 (void)SvIOK_only(*svp);
967 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
968 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
969 sv_catpvn(GvSV(errgv), message, klen);
970 }
971 sv_inc(*svp);
972 }
973 }
974 else
c07a80fd 975 sv_setpv(GvSV(errgv), message);
4633a7c4 976
a0d0e21e
LW
977 cxix = dopoptoeval(cxstack_ix);
978 if (cxix >= 0) {
979 I32 optype;
980
981 if (cxix < cxstack_ix)
982 dounwind(cxix);
983
984 POPBLOCK(cx,curpm);
985 if (cx->cx_type != CXt_EVAL) {
760ac839 986 PerlIO_printf(PerlIO_stderr(), "panic: die %s", message);
a0d0e21e
LW
987 my_exit(1);
988 }
989 POPEVAL(cx);
990
991 if (gimme == G_SCALAR)
992 *++newsp = &sv_undef;
993 stack_sp = newsp;
994
995 LEAVE;
748a9306 996
a0d0e21e 997 if (optype == OP_REQUIRE)
4633a7c4 998 DIE("%s", SvPVx(GvSV(errgv), na));
a0d0e21e
LW
999 return pop_return();
1000 }
1001 }
760ac839
LW
1002 PerlIO_printf(PerlIO_stderr(), "%s",message);
1003 PerlIO_flush(PerlIO_stderr());
f86702cc
PP
1004 my_failure_exit();
1005 /* NOTREACHED */
a0d0e21e
LW
1006 return 0;
1007}
1008
1009PP(pp_xor)
1010{
1011 dSP; dPOPTOPssrl;
1012 if (SvTRUE(left) != SvTRUE(right))
1013 RETSETYES;
1014 else
1015 RETSETNO;
1016}
1017
1018PP(pp_andassign)
1019{
1020 dSP;
1021 if (!SvTRUE(TOPs))
1022 RETURN;
1023 else
1024 RETURNOP(cLOGOP->op_other);
1025}
1026
1027PP(pp_orassign)
1028{
1029 dSP;
1030 if (SvTRUE(TOPs))
1031 RETURN;
1032 else
1033 RETURNOP(cLOGOP->op_other);
1034}
1035
1036#ifdef DEPRECATED
1037PP(pp_entersubr)
1038{
1039 dSP;
1040 SV** mark = (stack_base + *markstack_ptr + 1);
1041 SV* cv = *mark;
1042 while (mark < sp) { /* emulate old interface */
1043 *mark = mark[1];
1044 mark++;
1045 }
1046 *sp = cv;
1047 return pp_entersub();
1048}
1049#endif
1050
1051PP(pp_caller)
1052{
1053 dSP;
1054 register I32 cxix = dopoptosub(cxstack_ix);
1055 register CONTEXT *cx;
1056 I32 dbcxix;
54310121 1057 I32 gimme;
a0d0e21e
LW
1058 SV *sv;
1059 I32 count = 0;
1060
1061 if (MAXARG)
1062 count = POPi;
1063 EXTEND(SP, 6);
1064 for (;;) {
1065 if (cxix < 0) {
1066 if (GIMME != G_ARRAY)
1067 RETPUSHUNDEF;
1068 RETURN;
1069 }
1070 if (DBsub && cxix >= 0 &&
1071 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1072 count++;
1073 if (!count--)
1074 break;
1075 cxix = dopoptosub(cxix - 1);
1076 }
1077 cx = &cxstack[cxix];
06a5b730
PP
1078 if (cxstack[cxix].cx_type == CXt_SUB) {
1079 dbcxix = dopoptosub(cxix - 1);
1080 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1081 field below is defined for any cx. */
1082 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1083 cx = &cxstack[dbcxix];
1084 }
1085
a0d0e21e
LW
1086 if (GIMME != G_ARRAY) {
1087 dTARGET;
1088
1089 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1090 PUSHs(TARG);
1091 RETURN;
1092 }
a0d0e21e
LW
1093
1094 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1095 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1096 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1097 if (!MAXARG)
1098 RETURN;
06a5b730 1099 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
a0d0e21e 1100 sv = NEWSV(49, 0);
e5cf08de 1101 gv_efullname3(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch);
a0d0e21e
LW
1102 PUSHs(sv_2mortal(sv));
1103 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1104 }
1105 else {
1106 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1107 PUSHs(sv_2mortal(newSViv(0)));
1108 }
54310121
PP
1109 gimme = (I32)cx->blk_gimme;
1110 if (gimme == G_VOID)
1111 PUSHs(&sv_undef);
1112 else
1113 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
4633a7c4 1114 if (cx->cx_type == CXt_EVAL) {
06a5b730 1115 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1116 PUSHs(cx->blk_eval.cur_text);
06a5b730
PP
1117 PUSHs(&sv_no);
1118 }
1119 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1120 /* Require, put the name. */
1121 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1122 PUSHs(&sv_yes);
1123 }
4633a7c4
LW
1124 }
1125 else if (cx->cx_type == CXt_SUB &&
1126 cx->blk_sub.hasargs &&
1127 curcop->cop_stash == debstash)
1128 {
a0d0e21e
LW
1129 AV *ary = cx->blk_sub.argarray;
1130 int off = AvARRAY(ary) - AvALLOC(ary);
1131
1132 if (!dbargs) {
1133 GV* tmpgv;
1134 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1135 SVt_PVAV)));
a5f75d66 1136 GvMULTI_on(tmpgv);
a0d0e21e
LW
1137 AvREAL_off(dbargs); /* XXX Should be REIFY */
1138 }
1139
1140 if (AvMAX(dbargs) < AvFILL(ary) + off)
1141 av_extend(dbargs, AvFILL(ary) + off);
1142 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1143 AvFILL(dbargs) = AvFILL(ary) + off;
1144 }
1145 RETURN;
1146}
1147
1148static int
1149sortcv(a, b)
1150const void *a;
1151const void *b;
1152{
9607fc9c
PP
1153 SV * const *str1 = (SV * const *)a;
1154 SV * const *str2 = (SV * const *)b;
748a9306 1155 I32 oldsaveix = savestack_ix;
a0d0e21e
LW
1156 I32 oldscopeix = scopestack_ix;
1157 I32 result;
1158 GvSV(firstgv) = *str1;
1159 GvSV(secondgv) = *str2;
1160 stack_sp = stack_base;
1161 op = sortcop;
a6c477ed 1162 runops();
a0d0e21e
LW
1163 if (stack_sp != stack_base + 1)
1164 croak("Sort subroutine didn't return single value");
748a9306 1165 if (!SvNIOKp(*stack_sp))
a0d0e21e
LW
1166 croak("Sort subroutine didn't return a numeric value");
1167 result = SvIV(*stack_sp);
1168 while (scopestack_ix > oldscopeix) {
1169 LEAVE;
1170 }
748a9306 1171 leave_scope(oldsaveix);
a0d0e21e
LW
1172 return result;
1173}
1174
1175static int
1176sortcmp(a, b)
1177const void *a;
1178const void *b;
1179{
9607fc9c 1180 return sv_cmp(*(SV * const *)a, *(SV * const *)b);
bbce6d69 1181}
e5cf08de 1182
bbce6d69
PP
1183static int
1184sortcmp_locale(a, b)
1185const void *a;
1186const void *b;
1187{
9607fc9c 1188 return sv_cmp_locale(*(SV * const *)a, *(SV * const *)b);
a0d0e21e
LW
1189}
1190
1191PP(pp_reset)
1192{
1193 dSP;
1194 char *tmps;
1195
1196 if (MAXARG < 1)
1197 tmps = "";
1198 else
1199 tmps = POPp;
1200 sv_reset(tmps, curcop->cop_stash);
1201 PUSHs(&sv_yes);
1202 RETURN;
1203}
1204
1205PP(pp_lineseq)
1206{
1207 return NORMAL;
1208}
1209
1210PP(pp_dbstate)
1211{
1212 curcop = (COP*)op;
1213 TAINT_NOT; /* Each statement is presumed innocent */
1214 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1215 FREETMPS;
1216
1217 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1218 {
1219 SV **sp;
1220 register CV *cv;
1221 register CONTEXT *cx;
748a9306 1222 I32 gimme = G_ARRAY;
a0d0e21e
LW
1223 I32 hasargs;
1224 GV *gv;
1225
a0d0e21e
LW
1226 gv = DBgv;
1227 cv = GvCV(gv);
a0d0e21e
LW
1228 if (!cv)
1229 DIE("No DB::DB routine defined");
1230
06a5b730 1231 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1232 return NORMAL;
748a9306 1233
4633a7c4
LW
1234 ENTER;
1235 SAVETMPS;
1236
748a9306 1237 SAVEI32(debug);
55497cff 1238 SAVESTACK_POS();
748a9306
LW
1239 debug = 0;
1240 hasargs = 0;
1241 sp = stack_sp;
1242
a0d0e21e 1243 push_return(op->op_next);
748a9306 1244 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e
LW
1245 PUSHSUB(cx);
1246 CvDEPTH(cv)++;
1247 (void)SvREFCNT_inc(cv);
1248 SAVESPTR(curpad);
1249 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1250 RETURNOP(CvSTART(cv));
1251 }
1252 else
1253 return NORMAL;
1254}
1255
1256PP(pp_scope)
1257{
1258 return NORMAL;
1259}
1260
1261PP(pp_enteriter)
1262{
1263 dSP; dMARK;
1264 register CONTEXT *cx;
54310121 1265 I32 gimme = GIMME_V;
a0d0e21e
LW
1266 SV **svp;
1267
4633a7c4
LW
1268 ENTER;
1269 SAVETMPS;
1270
a0d0e21e
LW
1271 if (op->op_targ)
1272 svp = &curpad[op->op_targ]; /* "my" variable */
1273 else
1274 svp = &GvSV((GV*)POPs); /* symbol table variable */
1275
4633a7c4
LW
1276 SAVESPTR(*svp);
1277
a0d0e21e
LW
1278 ENTER;
1279
1280 PUSHBLOCK(cx, CXt_LOOP, SP);
1281 PUSHLOOP(cx, svp, MARK);
44a8e56a
PP
1282 if (op->op_flags & OPf_STACKED)
1283 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
4633a7c4 1284 else {
1ce6579f
PP
1285 cx->blk_loop.iterary = curstack;
1286 AvFILL(curstack) = sp - stack_base;
4633a7c4
LW
1287 cx->blk_loop.iterix = MARK - stack_base;
1288 }
a0d0e21e
LW
1289
1290 RETURN;
1291}
1292
1293PP(pp_enterloop)
1294{
1295 dSP;
1296 register CONTEXT *cx;
54310121 1297 I32 gimme = GIMME_V;
a0d0e21e
LW
1298
1299 ENTER;
1300 SAVETMPS;
1301 ENTER;
1302
1303 PUSHBLOCK(cx, CXt_LOOP, SP);
1304 PUSHLOOP(cx, 0, SP);
1305
1306 RETURN;
1307}
1308
1309PP(pp_leaveloop)
1310{
1311 dSP;
1312 register CONTEXT *cx;
f86702cc 1313 struct block_loop cxloop;
a0d0e21e
LW
1314 I32 gimme;
1315 SV **newsp;
1316 PMOP *newpm;
1317 SV **mark;
1318
1319 POPBLOCK(cx,newpm);
4fdae800 1320 mark = newsp;
f86702cc
PP
1321 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1322
54310121
PP
1323 if (gimme == G_VOID)
1324 ; /* do nothing */
1325 else if (gimme == G_SCALAR) {
1326 if (mark < SP)
1327 *++newsp = sv_mortalcopy(*SP);
1328 else
1329 *++newsp = &sv_undef;
a0d0e21e
LW
1330 }
1331 else {
1332 while (mark < SP)
1333 *++newsp = sv_mortalcopy(*++mark);
1334 }
f86702cc
PP
1335 SP = newsp;
1336 PUTBACK;
1337
1338 POPLOOP2(); /* Stack values are safe: release loop vars ... */
1339 curpm = newpm; /* ... and pop $1 et al */
1340
a0d0e21e
LW
1341 LEAVE;
1342 LEAVE;
1343
f86702cc 1344 return NORMAL;
a0d0e21e
LW
1345}
1346
1347PP(pp_return)
1348{
1349 dSP; dMARK;
1350 I32 cxix;
1351 register CONTEXT *cx;
f86702cc
PP
1352 struct block_sub cxsub;
1353 bool popsub2 = FALSE;
a0d0e21e
LW
1354 I32 gimme;
1355 SV **newsp;
1356 PMOP *newpm;
1357 I32 optype = 0;
1358
1ce6579f 1359 if (curstack == sortstack) {
a0d0e21e 1360 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9
AD
1361 if (cxstack_ix > sortcxix)
1362 dounwind(sortcxix);
1ce6579f 1363 AvARRAY(curstack)[1] = *SP;
a0d0e21e
LW
1364 stack_sp = stack_base + 1;
1365 return 0;
1366 }
1367 }
1368
1369 cxix = dopoptosub(cxstack_ix);
1370 if (cxix < 0)
1371 DIE("Can't return outside a subroutine");
1372 if (cxix < cxstack_ix)
1373 dounwind(cxix);
1374
1375 POPBLOCK(cx,newpm);
1376 switch (cx->cx_type) {
1377 case CXt_SUB:
f86702cc
PP
1378 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1379 popsub2 = TRUE;
a0d0e21e
LW
1380 break;
1381 case CXt_EVAL:
1382 POPEVAL(cx);
748a9306
LW
1383 if (optype == OP_REQUIRE &&
1384 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1385 {
54310121 1386 /* Unassume the success we assumed earlier. */
748a9306
LW
1387 char *name = cx->blk_eval.old_name;
1388 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1389 DIE("%s did not return a true value", name);
1390 }
a0d0e21e
LW
1391 break;
1392 default:
1393 DIE("panic: return");
a0d0e21e
LW
1394 }
1395
1396 if (gimme == G_SCALAR) {
1397 if (MARK < SP)
f86702cc
PP
1398 *++newsp = (popsub2 && SvTEMP(*SP))
1399 ? *SP : sv_mortalcopy(*SP);
a0d0e21e
LW
1400 else
1401 *++newsp = &sv_undef;
a0d0e21e 1402 }
54310121 1403 else if (gimme == G_ARRAY) {
f86702cc
PP
1404 while (++MARK <= SP)
1405 *++newsp = (popsub2 && SvTEMP(*MARK))
1406 ? *MARK : sv_mortalcopy(*MARK);
a0d0e21e 1407 }
a0d0e21e
LW
1408 stack_sp = newsp;
1409
f86702cc
PP
1410 /* Stack values are safe: */
1411 if (popsub2) {
1412 POPSUB2(); /* release CV and @_ ... */
1413 }
1414 curpm = newpm; /* ... and pop $1 et al */
1415
a0d0e21e
LW
1416 LEAVE;
1417 return pop_return();
1418}
1419
1420PP(pp_last)
1421{
1422 dSP;
1423 I32 cxix;
1424 register CONTEXT *cx;
f86702cc
PP
1425 struct block_loop cxloop;
1426 struct block_sub cxsub;
1427 I32 pop2 = 0;
a0d0e21e
LW
1428 I32 gimme;
1429 I32 optype;
1430 OP *nextop;
1431 SV **newsp;
1432 PMOP *newpm;
1433 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1434
1435 if (op->op_flags & OPf_SPECIAL) {
1436 cxix = dopoptoloop(cxstack_ix);
1437 if (cxix < 0)
1438 DIE("Can't \"last\" outside a block");
1439 }
1440 else {
1441 cxix = dopoptolabel(cPVOP->op_pv);
1442 if (cxix < 0)
1443 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1444 }
1445 if (cxix < cxstack_ix)
1446 dounwind(cxix);
1447
1448 POPBLOCK(cx,newpm);
1449 switch (cx->cx_type) {
1450 case CXt_LOOP:
f86702cc
PP
1451 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1452 pop2 = CXt_LOOP;
4fdae800 1453 nextop = cxloop.last_op->op_next;
a0d0e21e 1454 break;
f86702cc
PP
1455 case CXt_SUB:
1456 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1457 pop2 = CXt_SUB;
a0d0e21e
LW
1458 nextop = pop_return();
1459 break;
f86702cc
PP
1460 case CXt_EVAL:
1461 POPEVAL(cx);
a0d0e21e
LW
1462 nextop = pop_return();
1463 break;
1464 default:
1465 DIE("panic: last");
a0d0e21e
LW
1466 }
1467
1468 if (gimme == G_SCALAR) {
f86702cc
PP
1469 if (MARK < SP)
1470 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1471 ? *SP : sv_mortalcopy(*SP);
a0d0e21e
LW
1472 else
1473 *++newsp = &sv_undef;
1474 }
54310121 1475 else if (gimme == G_ARRAY) {
f86702cc
PP
1476 while (++MARK <= SP)
1477 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1478 ? *MARK : sv_mortalcopy(*MARK);
1479 }
1480 SP = newsp;
1481 PUTBACK;
1482
1483 /* Stack values are safe: */
1484 switch (pop2) {
1485 case CXt_LOOP:
1486 POPLOOP2(); /* release loop vars ... */
4fdae800 1487 LEAVE;
f86702cc
PP
1488 break;
1489 case CXt_SUB:
1490 POPSUB2(); /* release CV and @_ ... */
1491 break;
a0d0e21e 1492 }
f86702cc 1493 curpm = newpm; /* ... and pop $1 et al */
a0d0e21e
LW
1494
1495 LEAVE;
f86702cc 1496 return nextop;
a0d0e21e
LW
1497}
1498
1499PP(pp_next)
1500{
1501 I32 cxix;
1502 register CONTEXT *cx;
1503 I32 oldsave;
1504
1505 if (op->op_flags & OPf_SPECIAL) {
1506 cxix = dopoptoloop(cxstack_ix);
1507 if (cxix < 0)
1508 DIE("Can't \"next\" outside a block");
1509 }
1510 else {
1511 cxix = dopoptolabel(cPVOP->op_pv);
1512 if (cxix < 0)
1513 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1514 }
1515 if (cxix < cxstack_ix)
1516 dounwind(cxix);
1517
1518 TOPBLOCK(cx);
1519 oldsave = scopestack[scopestack_ix - 1];
1520 LEAVE_SCOPE(oldsave);
1521 return cx->blk_loop.next_op;
1522}
1523
1524PP(pp_redo)
1525{
1526 I32 cxix;
1527 register CONTEXT *cx;
1528 I32 oldsave;
1529
1530 if (op->op_flags & OPf_SPECIAL) {
1531 cxix = dopoptoloop(cxstack_ix);
1532 if (cxix < 0)
1533 DIE("Can't \"redo\" outside a block");
1534 }
1535 else {
1536 cxix = dopoptolabel(cPVOP->op_pv);
1537 if (cxix < 0)
1538 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1539 }
1540 if (cxix < cxstack_ix)
1541 dounwind(cxix);
1542
1543 TOPBLOCK(cx);
1544 oldsave = scopestack[scopestack_ix - 1];
1545 LEAVE_SCOPE(oldsave);
1546 return cx->blk_loop.redo_op;
1547}
1548
1549static OP* lastgotoprobe;
1550
1551static OP *
1552dofindlabel(op,label,opstack)
1553OP *op;
1554char *label;
1555OP **opstack;
1556{
1557 OP *kid;
1558 OP **ops = opstack;
1559
1560 if (op->op_type == OP_LEAVE ||
1561 op->op_type == OP_SCOPE ||
1562 op->op_type == OP_LEAVELOOP ||
1563 op->op_type == OP_LEAVETRY)
1564 *ops++ = cUNOP->op_first;
1565 *ops = 0;
1566 if (op->op_flags & OPf_KIDS) {
1567 /* First try all the kids at this level, since that's likeliest. */
1568 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1569 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1570 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1571 return kid;
1572 }
1573 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1574 if (kid == lastgotoprobe)
1575 continue;
1576 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1577 if (ops > opstack &&
1578 (ops[-1]->op_type == OP_NEXTSTATE ||
1579 ops[-1]->op_type == OP_DBSTATE))
1580 *ops = kid;
1581 else
1582 *ops++ = kid;
1583 }
1584 if (op = dofindlabel(kid,label,ops))
1585 return op;
1586 }
1587 }
1588 *ops = 0;
1589 return 0;
1590}
1591
1592PP(pp_dump)
1593{
1594 return pp_goto(ARGS);
1595 /*NOTREACHED*/
1596}
1597
1598PP(pp_goto)
1599{
1600 dSP;
1601 OP *retop = 0;
1602 I32 ix;
1603 register CONTEXT *cx;
1604 OP *enterops[64];
1605 char *label;
1606 int do_dump = (op->op_type == OP_DUMP);
1607
1608 label = 0;
1609 if (op->op_flags & OPf_STACKED) {
1610 SV *sv = POPs;
1611
1612 /* This egregious kludge implements goto &subroutine */
1613 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1614 I32 cxix;
1615 register CONTEXT *cx;
1616 CV* cv = (CV*)SvRV(sv);
1617 SV** mark;
1618 I32 items = 0;
1619 I32 oldsave;
1620
4aa0a1f7
AD
1621 if (!CvROOT(cv) && !CvXSUB(cv)) {
1622 if (CvGV(cv)) {
1623 SV *tmpstr = sv_newmortal();
e5cf08de 1624 gv_efullname3(tmpstr, CvGV(cv), Nullch);
4aa0a1f7
AD
1625 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1626 }
1627 DIE("Goto undefined subroutine");
1628 }
1629
a0d0e21e
LW
1630 /* First do some returnish stuff. */
1631 cxix = dopoptosub(cxstack_ix);
1632 if (cxix < 0)
1633 DIE("Can't goto subroutine outside a subroutine");
1634 if (cxix < cxstack_ix)
1635 dounwind(cxix);
1636 TOPBLOCK(cx);
1637 mark = stack_sp;
1638 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1639 AV* av = cx->blk_sub.argarray;
1640
1641 items = AvFILL(av) + 1;
1ce6579f
PP
1642 stack_sp++;
1643 EXTEND(stack_sp, items); /* @_ could have been extended. */
1644 Copy(AvARRAY(av), stack_sp, items, SV*);
a0d0e21e 1645 stack_sp += items;
2c05e328 1646 SvREFCNT_dec(GvAV(defgv));
a0d0e21e 1647 GvAV(defgv) = cx->blk_sub.savearray;
a0d0e21e 1648 AvREAL_off(av);
4633a7c4 1649 av_clear(av);
a0d0e21e
LW
1650 }
1651 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1652 SvREFCNT_dec(cx->blk_sub.cv);
1653 oldsave = scopestack[scopestack_ix - 1];
1654 LEAVE_SCOPE(oldsave);
1655
1656 /* Now do some callish stuff. */
1657 SAVETMPS;
1658 if (CvXSUB(cv)) {
1659 if (CvOLDSTYLE(cv)) {
ecfc5424 1660 I32 (*fp3)_((int,int,int));
a0d0e21e
LW
1661 while (sp > mark) {
1662 sp[1] = sp[0];
1663 sp--;
1664 }
ecfc5424
AD
1665 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1666 items = (*fp3)(CvXSUBANY(cv).any_i32,
1667 mark - stack_base + 1,
1668 items);
a0d0e21e
LW
1669 sp = stack_base + items;
1670 }
1671 else {
1ce6579f 1672 stack_sp--; /* There is no cv arg. */
a0d0e21e
LW
1673 (void)(*CvXSUB(cv))(cv);
1674 }
1675 LEAVE;
1676 return pop_return();
1677 }
1678 else {
1679 AV* padlist = CvPADLIST(cv);
1680 SV** svp = AvARRAY(padlist);
1681 cx->blk_sub.cv = cv;
1682 cx->blk_sub.olddepth = CvDEPTH(cv);
1683 CvDEPTH(cv)++;
1684 if (CvDEPTH(cv) < 2)
1685 (void)SvREFCNT_inc(cv);
1686 else { /* save temporaries on recursion? */
1687 if (CvDEPTH(cv) == 100 && dowarn)
44a8e56a 1688 sub_crush_depth(cv);
a0d0e21e
LW
1689 if (CvDEPTH(cv) > AvFILL(padlist)) {
1690 AV *newpad = newAV();
4aa0a1f7 1691 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e
LW
1692 I32 ix = AvFILL((AV*)svp[1]);
1693 svp = AvARRAY(svp[0]);
748a9306 1694 for ( ;ix > 0; ix--) {
a0d0e21e 1695 if (svp[ix] != &sv_undef) {
748a9306 1696 char *name = SvPVX(svp[ix]);
5f05dabc
PP
1697 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
1698 || *name == '&')
1699 {
1700 /* outer lexical or anon code */
748a9306 1701 av_store(newpad, ix,
4aa0a1f7 1702 SvREFCNT_inc(oldpad[ix]) );
748a9306
LW
1703 }
1704 else { /* our own lexical */
1705 if (*name == '@')
1706 av_store(newpad, ix, sv = (SV*)newAV());
1707 else if (*name == '%')
1708 av_store(newpad, ix, sv = (SV*)newHV());
1709 else
1710 av_store(newpad, ix, sv = NEWSV(0,0));
1711 SvPADMY_on(sv);
1712 }
a0d0e21e
LW
1713 }
1714 else {
748a9306 1715 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e
LW
1716 SvPADTMP_on(sv);
1717 }
1718 }
1719 if (cx->blk_sub.hasargs) {
1720 AV* av = newAV();
1721 av_extend(av, 0);
1722 av_store(newpad, 0, (SV*)av);
1723 AvFLAGS(av) = AVf_REIFY;
1724 }
1725 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1726 AvFILL(padlist) = CvDEPTH(cv);
1727 svp = AvARRAY(padlist);
1728 }
1729 }
1730 SAVESPTR(curpad);
1731 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1732 if (cx->blk_sub.hasargs) {
1733 AV* av = (AV*)curpad[0];
1734 SV** ary;
1735
1736 cx->blk_sub.savearray = GvAV(defgv);
1737 cx->blk_sub.argarray = av;
2c05e328 1738 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
a0d0e21e
LW
1739 ++mark;
1740
1741 if (items >= AvMAX(av) + 1) {
1742 ary = AvALLOC(av);
1743 if (AvARRAY(av) != ary) {
1744 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1745 SvPVX(av) = (char*)ary;
1746 }
1747 if (items >= AvMAX(av) + 1) {
1748 AvMAX(av) = items - 1;
1749 Renew(ary,items+1,SV*);
1750 AvALLOC(av) = ary;
1751 SvPVX(av) = (char*)ary;
1752 }
1753 }
1754 Copy(mark,AvARRAY(av),items,SV*);
1755 AvFILL(av) = items - 1;
1756
1757 while (items--) {
1758 if (*mark)
1759 SvTEMP_off(*mark);
1760 mark++;
1761 }
1762 }
f967eb5f 1763 if (perldb && curstash != debstash) {
44a8e56a
PP
1764 /*
1765 * We do not care about using sv to call CV;
1766 * it's for informational purposes only.
1767 */
1ce6579f
PP
1768 SV *sv = GvSV(DBsub);
1769 save_item(sv);
e5cf08de 1770 gv_efullname3(sv, CvGV(cv), Nullch);
1ce6579f 1771 }
a0d0e21e
LW
1772 RETURNOP(CvSTART(cv));
1773 }
1774 }
1775 else
1776 label = SvPV(sv,na);
1777 }
1778 else if (op->op_flags & OPf_SPECIAL) {
1779 if (! do_dump)
1780 DIE("goto must have label");
1781 }
1782 else
1783 label = cPVOP->op_pv;
1784
1785 if (label && *label) {
1786 OP *gotoprobe = 0;
1787
1788 /* find label */
1789
1790 lastgotoprobe = 0;
1791 *enterops = 0;
1792 for (ix = cxstack_ix; ix >= 0; ix--) {
1793 cx = &cxstack[ix];
1794 switch (cx->cx_type) {
1795 case CXt_SUB:
1796 gotoprobe = CvROOT(cx->blk_sub.cv);
1797 break;
1798 case CXt_EVAL:
1799 gotoprobe = eval_root; /* XXX not good for nested eval */
1800 break;
1801 case CXt_LOOP:
1802 gotoprobe = cx->blk_oldcop->op_sibling;
1803 break;
1804 case CXt_SUBST:
1805 continue;
1806 case CXt_BLOCK:
1807 if (ix)
1808 gotoprobe = cx->blk_oldcop->op_sibling;
1809 else
1810 gotoprobe = main_root;
1811 break;
0a753a76
PP
1812 case CXt_NULL:
1813 DIE("Can't \"goto\" outside a block");
a0d0e21e
LW
1814 default:
1815 if (ix)
1816 DIE("panic: goto");
68dc0745 1817 gotoprobe = main_root;
a0d0e21e
LW
1818 break;
1819 }
1820 retop = dofindlabel(gotoprobe, label, enterops);
1821 if (retop)
1822 break;
1823 lastgotoprobe = gotoprobe;
1824 }
1825 if (!retop)
1826 DIE("Can't find label %s", label);
1827
1828 /* pop unwanted frames */
1829
1830 if (ix < cxstack_ix) {
1831 I32 oldsave;
1832
1833 if (ix < 0)
1834 ix = 0;
1835 dounwind(ix);
1836 TOPBLOCK(cx);
1837 oldsave = scopestack[scopestack_ix];
1838 LEAVE_SCOPE(oldsave);
1839 }
1840
1841 /* push wanted frames */
1842
748a9306 1843 if (*enterops && enterops[1]) {
a0d0e21e 1844 OP *oldop = op;
748a9306 1845 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e
LW
1846 op = enterops[ix];
1847 (*op->op_ppaddr)();
1848 }
1849 op = oldop;
1850 }
1851 }
1852
1853 if (do_dump) {
a5f75d66
AD
1854#ifdef VMS
1855 if (!retop) retop = main_start;
1856#endif
a0d0e21e
LW
1857 restartop = retop;
1858 do_undump = TRUE;
1859
1860 my_unexec();
1861
1862 restartop = 0; /* hmm, must be GNU unexec().. */
1863 do_undump = FALSE;
1864 }
1865
1ce6579f 1866 if (curstack == signalstack) {
748a9306 1867 restartop = retop;
54310121 1868 JMPENV_JUMP(3);
748a9306
LW
1869 }
1870
a0d0e21e
LW
1871 RETURNOP(retop);
1872}
1873
1874PP(pp_exit)
1875{
1876 dSP;
1877 I32 anum;
1878
1879 if (MAXARG < 1)
1880 anum = 0;
ff0cee69 1881 else {
a0d0e21e 1882 anum = SvIVx(POPs);
ff0cee69
PP
1883#ifdef VMSISH_EXIT
1884 if (anum == 1 && VMSISH_EXIT)
1885 anum = 0;
1886#endif
1887 }
a0d0e21e
LW
1888 my_exit(anum);
1889 PUSHs(&sv_undef);
1890 RETURN;
1891}
1892
1893#ifdef NOTYET
1894PP(pp_nswitch)
1895{
1896 dSP;
1897 double value = SvNVx(GvSV(cCOP->cop_gv));
1898 register I32 match = I_32(value);
1899
1900 if (value < 0.0) {
1901 if (((double)match) > value)
1902 --match; /* was fractional--truncate other way */
1903 }
1904 match -= cCOP->uop.scop.scop_offset;
1905 if (match < 0)
1906 match = 0;
1907 else if (match > cCOP->uop.scop.scop_max)
1908 match = cCOP->uop.scop.scop_max;
1909 op = cCOP->uop.scop.scop_next[match];
1910 RETURNOP(op);
1911}
1912
1913PP(pp_cswitch)
1914{
1915 dSP;
1916 register I32 match;
1917
1918 if (multiline)
1919 op = op->op_next; /* can't assume anything */
1920 else {
1921 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1922 match -= cCOP->uop.scop.scop_offset;
1923 if (match < 0)
1924 match = 0;
1925 else if (match > cCOP->uop.scop.scop_max)
1926 match = cCOP->uop.scop.scop_max;
1927 op = cCOP->uop.scop.scop_next[match];
1928 }
1929 RETURNOP(op);
1930}
1931#endif
1932
1933/* Eval. */
1934
1935static void
1936save_lines(array, sv)
1937AV *array;
1938SV *sv;
1939{
1940 register char *s = SvPVX(sv);
1941 register char *send = SvPVX(sv) + SvCUR(sv);
1942 register char *t;
1943 register I32 line = 1;
1944
1945 while (s && s < send) {
1946 SV *tmpstr = NEWSV(85,0);
1947
1948 sv_upgrade(tmpstr, SVt_PVMG);
1949 t = strchr(s, '\n');
1950 if (t)
1951 t++;
1952 else
1953 t = send;
1954
1955 sv_setpvn(tmpstr, s, t - s);
1956 av_store(array, line++, tmpstr);
1957 s = t;
1958 }
1959}
1960
1961static OP *
1e422769
PP
1962docatch(o)
1963OP *o;
1964{
1965 int ret;
035902c7 1966 I32 oldrunlevel = runlevel;
1e422769 1967 OP *oldop = op;
54310121 1968 dJMPENV;
1e422769
PP
1969
1970 op = o;
1e422769 1971#ifdef DEBUGGING
54310121 1972 assert(CATCH_GET == TRUE);
035902c7 1973 DEBUG_l(deb("(Setting up local jumplevel, runlevel = %ld)\n", (long)runlevel+1));
1e422769 1974#endif
22921e25
CS
1975 JMPENV_PUSH(ret);
1976 switch (ret) {
1e422769 1977 default: /* topmost level handles it */
54310121 1978 JMPENV_POP;
1e422769 1979 runlevel = oldrunlevel;
1e422769 1980 op = oldop;
54310121 1981 JMPENV_JUMP(ret);
1e422769
PP
1982 /* NOTREACHED */
1983 case 3:
1984 if (!restartop) {
1985 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1986 break;
1987 }
1e422769
PP
1988 op = restartop;
1989 restartop = 0;
1990 /* FALL THROUGH */
1991 case 0:
1992 runops();
1993 break;
1994 }
54310121 1995 JMPENV_POP;
1e422769 1996 runlevel = oldrunlevel;
1e422769
PP
1997 op = oldop;
1998 return Nullop;
1999}
2000
2001static OP *
a0d0e21e
LW
2002doeval(gimme)
2003int gimme;
2004{
2005 dSP;
2006 OP *saveop = op;
2007 HV *newstash;
ff3ff8d1 2008 CV *caller;
748a9306 2009 AV* comppadlist;
a0d0e21e
LW
2010
2011 in_eval = 1;
2012
1ce6579f
PP
2013 PUSHMARK(SP);
2014
a0d0e21e
LW
2015 /* set up a scratch pad */
2016
55497cff 2017 SAVEI32(padix);
a0d0e21e
LW
2018 SAVESPTR(curpad);
2019 SAVESPTR(comppad);
2020 SAVESPTR(comppad_name);
55497cff
PP
2021 SAVEI32(comppad_name_fill);
2022 SAVEI32(min_intro_pending);
2023 SAVEI32(max_intro_pending);
748a9306 2024
ff3ff8d1 2025 caller = compcv;
748a9306
LW
2026 SAVESPTR(compcv);
2027 compcv = (CV*)NEWSV(1104,0);
2028 sv_upgrade((SV *)compcv, SVt_PVCV);
07055b4c 2029 CvUNIQUE_on(compcv);
748a9306 2030
a0d0e21e
LW
2031 comppad = newAV();
2032 comppad_name = newAV();
2033 comppad_name_fill = 0;
2034 min_intro_pending = 0;
2035 av_push(comppad, Nullsv);
2036 curpad = AvARRAY(comppad);
2037 padix = 0;
2038
748a9306
LW
2039 comppadlist = newAV();
2040 AvREAL_off(comppadlist);
8e07c86e
AD
2041 av_store(comppadlist, 0, (SV*)comppad_name);
2042 av_store(comppadlist, 1, (SV*)comppad);
748a9306 2043 CvPADLIST(compcv) = comppadlist;
2c05e328
CS
2044
2045 if (saveop->op_type != OP_REQUIRE)
2046 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(caller);
07055b4c 2047
8e07c86e 2048 SAVEFREESV(compcv);
748a9306 2049
a0d0e21e
LW
2050 /* make sure we compile in the right package */
2051
2052 newstash = curcop->cop_stash;
2053 if (curstash != newstash) {
2054 SAVESPTR(curstash);
2055 curstash = newstash;
2056 }
2057 SAVESPTR(beginav);
2058 beginav = newAV();
2059 SAVEFREESV(beginav);
2060
2061 /* try to compile it */
2062
2063 eval_root = Nullop;
2064 error_count = 0;
2065 curcop = &compiling;
2066 curcop->cop_arybase = 0;
c07a80fd
PP
2067 SvREFCNT_dec(rs);
2068 rs = newSVpv("\n", 1);
1ce6579f
PP
2069 if (saveop->op_flags & OPf_SPECIAL)
2070 in_eval |= 4;
2071 else
2072 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2073 if (yyparse() || error_count || !eval_root) {
2074 SV **newsp;
2075 I32 gimme;
2076 CONTEXT *cx;
2077 I32 optype;
2078
2079 op = saveop;
2080 if (eval_root) {
2081 op_free(eval_root);
2082 eval_root = Nullop;
2083 }
1ce6579f 2084 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e
LW
2085 POPBLOCK(cx,curpm);
2086 POPEVAL(cx);
2087 pop_return();
2088 lex_end();
2089 LEAVE;
2090 if (optype == OP_REQUIRE)
4633a7c4 2091 DIE("%s", SvPVx(GvSV(errgv), na));
c07a80fd
PP
2092 SvREFCNT_dec(rs);
2093 rs = SvREFCNT_inc(nrs);
a0d0e21e
LW
2094 RETPUSHUNDEF;
2095 }
c07a80fd
PP
2096 SvREFCNT_dec(rs);
2097 rs = SvREFCNT_inc(nrs);
a0d0e21e 2098 compiling.cop_line = 0;
a0d0e21e 2099 SAVEFREEOP(eval_root);
54310121
PP
2100 if (gimme & G_VOID)
2101 scalarvoid(eval_root);
2102 else if (gimme & G_ARRAY)
a0d0e21e
LW
2103 list(eval_root);
2104 else
2105 scalar(eval_root);
2106
2107 DEBUG_x(dump_eval());
2108
55497cff 2109 /* Register with debugger: */
55497cff
PP
2110 if (perldb && saveop->op_type == OP_REQUIRE) {
2111 CV *cv = perl_get_cv("DB::postponed", FALSE);
55497cff
PP
2112 if (cv) {
2113 dSP;
2114 PUSHMARK(sp);
2115 XPUSHs((SV*)compiling.cop_filegv);
2116 PUTBACK;
2117 perl_call_sv((SV*)cv, G_DISCARD);
2118 }
2119 }
2120
a0d0e21e
LW
2121 /* compiled okay, so do it */
2122
4fdae800
PP
2123 CvDEPTH(compcv) = 1;
2124
1ce6579f 2125 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e
LW
2126 RETURNOP(eval_start);
2127}
2128
2129PP(pp_require)
2130{
2131 dSP;
2132 register CONTEXT *cx;
2133 SV *sv;
2134 char *name;
2135 char *tmpname;
2136 SV** svp;
2137 I32 gimme = G_SCALAR;
760ac839 2138 PerlIO *tryrsfp = 0;
a0d0e21e
LW
2139
2140 sv = POPs;
4633a7c4 2141 if (SvNIOKp(sv) && !SvPOKp(sv)) {
36477c24 2142 SET_NUMERIC_STANDARD();
a5f75d66
AD
2143 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2144 DIE("Perl %s required--this is only version %s, stopped",
2145 SvPV(sv,na),patchlevel);
a0d0e21e
LW
2146 RETPUSHYES;
2147 }
2148 name = SvPV(sv, na);
2149 if (!*name)
2150 DIE("Null filename used");
4633a7c4 2151 TAINT_PROPER("require");
a0d0e21e
LW
2152 if (op->op_type == OP_REQUIRE &&
2153 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2154 *svp != &sv_undef)
2155 RETPUSHYES;
2156
2157 /* prepare to compile file */
2158
2159 tmpname = savepv(name);
2160 if (*tmpname == '/' ||
2161 (*tmpname == '.' &&
2162 (tmpname[1] == '/' ||
748a9306 2163 (tmpname[1] == '.' && tmpname[2] == '/')))
4633a7c4
LW
2164#ifdef DOSISH
2165 || (tmpname[0] && tmpname[1] == ':')
2166#endif
748a9306 2167#ifdef VMS
bbce6d69
PP
2168 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2169 (isALNUM(tmpname[1]) || strchr("$-_]>",tmpname[1]))))
748a9306
LW
2170#endif
2171 )
a0d0e21e 2172 {
760ac839 2173 tryrsfp = PerlIO_open(tmpname,"r");
a0d0e21e
LW
2174 }
2175 else {
2176 AV *ar = GvAVn(incgv);
2177 I32 i;
748a9306 2178#ifdef VMS
bbce6d69
PP
2179 char unixified[256];
2180 if (tounixspec_ts(tmpname,unixified) != NULL)
2181 for (i = 0; i <= AvFILL(ar); i++) {
748a9306 2182 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
4633a7c4 2183 continue;
bbce6d69 2184 strcat(buf,unixified);
748a9306 2185#else
bbce6d69 2186 for (i = 0; i <= AvFILL(ar); i++) {
a0d0e21e
LW
2187 (void)sprintf(buf, "%s/%s",
2188 SvPVx(*av_fetch(ar, i, TRUE), na), name);
748a9306 2189#endif
760ac839 2190 tryrsfp = PerlIO_open(buf, "r");
a0d0e21e
LW
2191 if (tryrsfp) {
2192 char *s = buf;
2193
2194 if (*s == '.' && s[1] == '/')
2195 s += 2;
2196 Safefree(tmpname);
2197 tmpname = savepv(s);
2198 break;
2199 }
2200 }
2201 }
2202 SAVESPTR(compiling.cop_filegv);
2203 compiling.cop_filegv = gv_fetchfile(tmpname);
2204 Safefree(tmpname);
2205 tmpname = Nullch;
2206 if (!tryrsfp) {
2207 if (op->op_type == OP_REQUIRE) {
2208 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2209 if (instr(tokenbuf,".h "))
2210 strcat(tokenbuf," (change .h to .ph maybe?)");
2211 if (instr(tokenbuf,".ph "))
2212 strcat(tokenbuf," (did you run h2ph?)");
2213 DIE("%s",tokenbuf);
2214 }
2215
2216 RETPUSHUNDEF;
2217 }
2218
2219 /* Assume success here to prevent recursive requirement. */
2220 (void)hv_store(GvHVn(incgv), name, strlen(name),
2221 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2222
2223 ENTER;
2224 SAVETMPS;
2225 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73
AD
2226 if (rsfp_filters){
2227 save_aptr(&rsfp_filters);
2228 rsfp_filters = NULL;
2229 }
2230
a0d0e21e
LW
2231 rsfp = tryrsfp;
2232 name = savepv(name);
2233 SAVEFREEPV(name);
2234 SAVEI32(hints);
2235 hints = 0;
2236
2237 /* switch to eval mode */
2238
2239 push_return(op->op_next);
2240 PUSHBLOCK(cx, CXt_EVAL, SP);
2241 PUSHEVAL(cx, name, compiling.cop_filegv);
2242
2243 compiling.cop_line = 0;
2244
2245 PUTBACK;
1e422769 2246 return DOCATCH(doeval(G_SCALAR));
a0d0e21e
LW
2247}
2248
2249PP(pp_dofile)
2250{
2251 return pp_require(ARGS);
2252}
2253
2254PP(pp_entereval)
2255{
2256 dSP;
2257 register CONTEXT *cx;
2258 dPOPss;
54310121 2259 I32 gimme = GIMME_V, was = sub_generation;
55497cff 2260 char tmpbuf[32], *safestr;
a0d0e21e 2261 STRLEN len;
55497cff 2262 OP *ret;
a0d0e21e
LW
2263
2264 if (!SvPV(sv,len) || !len)
2265 RETPUSHUNDEF;
748a9306 2266 TAINT_PROPER("eval");
a0d0e21e
LW
2267
2268 ENTER;
a0d0e21e 2269 lex_start(sv);
748a9306 2270 SAVETMPS;
a0d0e21e
LW
2271
2272 /* switch to eval mode */
2273
748a9306 2274 SAVESPTR(compiling.cop_filegv);
ff0cee69 2275 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++evalseq);
a0d0e21e
LW
2276 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2277 compiling.cop_line = 1;
55497cff
PP
2278 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2279 deleting the eval's FILEGV from the stash before gv_check() runs
2280 (i.e. before run-time proper). To work around the coredump that
2281 ensues, we always turn GvMULTI_on for any globals that were
2282 introduced within evals. See force_ident(). GSAR 96-10-12 */
2283 safestr = savepv(tmpbuf);
2284 SAVEDELETE(defstash, safestr, strlen(safestr));
a0d0e21e
LW
2285 SAVEI32(hints);
2286 hints = op->op_targ;
2287
2288 push_return(op->op_next);
2289 PUSHBLOCK(cx, CXt_EVAL, SP);
2290 PUSHEVAL(cx, 0, compiling.cop_filegv);
2291
2292 /* prepare to compile string */
2293
2294 if (perldb && curstash != debstash)
2295 save_lines(GvAV(compiling.cop_filegv), linestr);
2296 PUTBACK;
55497cff
PP
2297 ret = doeval(gimme);
2298 if (perldb && was != sub_generation) { /* Some subs defined here. */
2299 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
2300 }
1e422769 2301 return DOCATCH(ret);
a0d0e21e
LW
2302}
2303
2304PP(pp_leaveeval)
2305{
2306 dSP;
2307 register SV **mark;
2308 SV **newsp;
2309 PMOP *newpm;
2310 I32 gimme;
2311 register CONTEXT *cx;
2312 OP *retop;
760ac839 2313 U8 save_flags = op -> op_flags;
a0d0e21e
LW
2314 I32 optype;
2315
2316 POPBLOCK(cx,newpm);
2317 POPEVAL(cx);
2318 retop = pop_return();
2319
54310121
PP
2320 if (gimme == G_VOID)
2321 MARK = newsp;
2322 else if (gimme == G_SCALAR) {
2323 MARK = newsp + 1;
2324 if (MARK <= SP) {
2325 if (SvFLAGS(TOPs) & SVs_TEMP)
2326 *MARK = TOPs;
2327 else
2328 *MARK = sv_mortalcopy(TOPs);
2329 }
a0d0e21e 2330 else {
54310121
PP
2331 MEXTEND(mark,0);
2332 *MARK = &sv_undef;
a0d0e21e 2333 }
a0d0e21e
LW
2334 }
2335 else {
2336 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2337 if (!(SvFLAGS(*mark) & SVs_TEMP))
a0d0e21e
LW
2338 *mark = sv_mortalcopy(*mark);
2339 /* in case LEAVE wipes old return values */
2340 }
2341 curpm = newpm; /* Don't pop $1 et al till now */
2342
4fdae800
PP
2343#ifdef DEBUGGING
2344 assert(CvDEPTH(compcv) == 1);
2345#endif
2346 CvDEPTH(compcv) = 0;
2347
1ce6579f 2348 if (optype == OP_REQUIRE &&
54310121
PP
2349 !(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp))
2350 {
1ce6579f 2351 /* Unassume the success we assumed earlier. */
54310121 2352 char *name = cx->blk_eval.old_name;
1ce6579f
PP
2353 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
2354 retop = die("%s did not return a true value", name);
a0d0e21e
LW
2355 }
2356
2357 lex_end();
2358 LEAVE;
4fdae800 2359
760ac839 2360 if (!(save_flags & OPf_SPECIAL))
1ce6579f 2361 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2362
2363 RETURNOP(retop);
2364}
2365
a0d0e21e
LW
2366PP(pp_entertry)
2367{
2368 dSP;
2369 register CONTEXT *cx;
54310121 2370 I32 gimme = GIMME_V;
a0d0e21e
LW
2371
2372 ENTER;
2373 SAVETMPS;
2374
2375 push_return(cLOGOP->op_other->op_next);
2376 PUSHBLOCK(cx, CXt_EVAL, SP);
2377 PUSHEVAL(cx, 0, 0);
2378 eval_root = op; /* Only needed so that goto works right. */
2379
2380 in_eval = 1;
4633a7c4 2381 sv_setpv(GvSV(errgv),"");
1e422769
PP
2382 PUTBACK;
2383 return DOCATCH(op->op_next);
a0d0e21e
LW
2384}
2385
2386PP(pp_leavetry)
2387{
2388 dSP;
2389 register SV **mark;
2390 SV **newsp;
2391 PMOP *newpm;
2392 I32 gimme;
2393 register CONTEXT *cx;
2394 I32 optype;
2395
2396 POPBLOCK(cx,newpm);
2397 POPEVAL(cx);
2398 pop_return();
2399
54310121
PP
2400 if (gimme == G_VOID)
2401 SP = newsp;
2402 else if (gimme == G_SCALAR) {
2403 MARK = newsp + 1;
2404 if (MARK <= SP) {
2405 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2406 *MARK = TOPs;
2407 else
2408 *MARK = sv_mortalcopy(TOPs);
2409 }
a0d0e21e 2410 else {
54310121
PP
2411 MEXTEND(mark,0);
2412 *MARK = &sv_undef;
a0d0e21e
LW
2413 }
2414 SP = MARK;
2415 }
2416 else {
2417 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2418 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
a0d0e21e
LW
2419 *mark = sv_mortalcopy(*mark);
2420 /* in case LEAVE wipes old return values */
2421 }
2422 curpm = newpm; /* Don't pop $1 et al till now */
2423
2424 LEAVE;
4633a7c4 2425 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2426 RETURN;
2427}
2428
2429static void
2430doparseform(sv)
2431SV *sv;
2432{
2433 STRLEN len;
2434 register char *s = SvPV_force(sv, len);
2435 register char *send = s + len;
2436 register char *base;
2437 register I32 skipspaces = 0;
2438 bool noblank;
2439 bool repeat;
2440 bool postspace = FALSE;
2441 U16 *fops;
2442 register U16 *fpc;
2443 U16 *linepc;
2444 register I32 arg;
2445 bool ischop;
2446
55497cff 2447 if (len == 0)
bbce6d69 2448 croak("Null picture in formline");
55497cff
PP
2449
2450 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
a0d0e21e
LW
2451 fpc = fops;
2452
2453 if (s < send) {
2454 linepc = fpc;
2455 *fpc++ = FF_LINEMARK;
2456 noblank = repeat = FALSE;
2457 base = s;
2458 }
2459
2460 while (s <= send) {
2461 switch (*s++) {
2462 default:
2463 skipspaces = 0;
2464 continue;
2465
2466 case '~':
2467 if (*s == '~') {
2468 repeat = TRUE;
2469 *s = ' ';
2470 }
2471 noblank = TRUE;
2472 s[-1] = ' ';
2473 /* FALL THROUGH */
2474 case ' ': case '\t':
2475 skipspaces++;
2476 continue;
2477
2478 case '\n': case 0:
2479 arg = s - base;
2480 skipspaces++;
2481 arg -= skipspaces;
2482 if (arg) {
5f05dabc 2483 if (postspace)
a0d0e21e 2484 *fpc++ = FF_SPACE;
a0d0e21e
LW
2485 *fpc++ = FF_LITERAL;
2486 *fpc++ = arg;
2487 }
5f05dabc 2488 postspace = FALSE;
a0d0e21e
LW
2489 if (s <= send)
2490 skipspaces--;
2491 if (skipspaces) {
2492 *fpc++ = FF_SKIP;
2493 *fpc++ = skipspaces;
2494 }
2495 skipspaces = 0;
2496 if (s <= send)
2497 *fpc++ = FF_NEWLINE;
2498 if (noblank) {
2499 *fpc++ = FF_BLANK;
2500 if (repeat)
2501 arg = fpc - linepc + 1;
2502 else
2503 arg = 0;
2504 *fpc++ = arg;
2505 }
2506 if (s < send) {
2507 linepc = fpc;
2508 *fpc++ = FF_LINEMARK;
2509 noblank = repeat = FALSE;
2510 base = s;
2511 }
2512 else
2513 s++;
2514 continue;
2515
2516 case '@':
2517 case '^':
2518 ischop = s[-1] == '^';
2519
2520 if (postspace) {
2521 *fpc++ = FF_SPACE;
2522 postspace = FALSE;
2523 }
2524 arg = (s - base) - 1;
2525 if (arg) {
2526 *fpc++ = FF_LITERAL;
2527 *fpc++ = arg;
2528 }
2529
2530 base = s - 1;
2531 *fpc++ = FF_FETCH;
2532 if (*s == '*') {
2533 s++;
2534 *fpc++ = 0;
2535 *fpc++ = FF_LINEGLOB;
2536 }
2537 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2538 arg = ischop ? 512 : 0;
2539 base = s - 1;
2540 while (*s == '#')
2541 s++;
2542 if (*s == '.') {
2543 char *f;
2544 s++;
2545 f = s;
2546 while (*s == '#')
2547 s++;
2548 arg |= 256 + (s - f);
2549 }
2550 *fpc++ = s - base; /* fieldsize for FETCH */
2551 *fpc++ = FF_DECIMAL;
2552 *fpc++ = arg;
2553 }
2554 else {
2555 I32 prespace = 0;
2556 bool ismore = FALSE;
2557
2558 if (*s == '>') {
2559 while (*++s == '>') ;
2560 prespace = FF_SPACE;
2561 }
2562 else if (*s == '|') {
2563 while (*++s == '|') ;
2564 prespace = FF_HALFSPACE;
2565 postspace = TRUE;
2566 }
2567 else {
2568 if (*s == '<')
2569 while (*++s == '<') ;
2570 postspace = TRUE;
2571 }
2572 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2573 s += 3;
2574 ismore = TRUE;
2575 }
2576 *fpc++ = s - base; /* fieldsize for FETCH */
2577
2578 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2579
2580 if (prespace)
2581 *fpc++ = prespace;
2582 *fpc++ = FF_ITEM;
2583 if (ismore)
2584 *fpc++ = FF_MORE;
2585 if (ischop)
2586 *fpc++ = FF_CHOP;
2587 }
2588 base = s;
2589 skipspaces = 0;
2590 continue;
2591 }
2592 }
2593 *fpc++ = FF_END;
2594
2595 arg = fpc - fops;
2596 { /* need to jump to the next word */
2597 int z;
2598 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2599 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2600 s = SvPVX(sv) + SvCUR(sv) + z;
2601 }
2602 Copy(fops, s, arg, U16);
2603 Safefree(fops);
55497cff 2604 sv_magic(sv, Nullsv, 'f', Nullch, 0);
a0d0e21e
LW
2605 SvCOMPILED_on(sv);
2606}