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Little patch for perl5.003_97c/pod/perlpod.pod
[perl5.git] / pp_ctl.c
CommitLineData
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LW
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))
1e422769
PP
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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PP
38static int sortcmp _((const void *, const void *));
39static int sortcmp_locale _((const void *, const void *));
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LW
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
54310121
PP
53 switch (cxstack[cxix].blk_gimme) {
54 case G_ARRAY:
a0d0e21e 55 RETPUSHYES;
54310121 56 case G_SCALAR:
a0d0e21e 57 RETPUSHNO;
54310121
PP
58 default:
59 RETPUSHUNDEF;
60 }
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LW
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
4633a7c4
LW
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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LW
87 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
88 pm->op_pmregexp = pregcomp(t, t + len, pm);
89 }
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LW
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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LW
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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LW
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
71be2cbc
PP
119 if (!cx->sb_rxtainted)
120 cx->sb_rxtainted = SvTAINTED(TOPs);
a0d0e21e 121 sv_catsv(dstr, POPs);
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122
123 /* Are we done */
e50aee73 124 if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
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125 s == m, Nullsv, cx->sb_safebase))
126 {
127 SV *targ = cx->sb_targ;
128 sv_catpvn(dstr, s, cx->sb_strend - s);
748a9306 129
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CS
130 TAINT_IF(cx->sb_rxtainted || rx->exec_tainted);
131
4633a7c4 132 (void)SvOOK_off(targ);
cb0b1708 133 Safefree(SvPVX(targ));
748a9306
LW
134 SvPVX(targ) = SvPVX(dstr);
135 SvCUR_set(targ, SvCUR(dstr));
136 SvLEN_set(targ, SvLEN(dstr));
137 SvPVX(dstr) = 0;
138 sv_free(dstr);
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139 (void)SvPOK_only(targ);
140 SvSETMAGIC(targ);
9212bbba 141 SvTAINT(targ);
5cd24f17 142
a0d0e21e 143 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
4633a7c4 144 LEAVE_SCOPE(cx->sb_oldsave);
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145 POPSUBST(cx);
146 RETURNOP(pm->op_next);
147 }
148 }
149 if (rx->subbase && rx->subbase != orig) {
150 m = s;
151 s = orig;
152 cx->sb_orig = orig = rx->subbase;
153 s = orig + (m - s);
154 cx->sb_strend = s + (cx->sb_strend - m);
155 }
156 cx->sb_m = m = rx->startp[0];
157 sv_catpvn(dstr, s, m-s);
158 cx->sb_s = rx->endp[0];
71be2cbc 159 cx->sb_rxtainted |= rx->exec_tainted;
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LW
160 RETURNOP(pm->op_pmreplstart);
161}
162
163PP(pp_formline)
164{
165 dSP; dMARK; dORIGMARK;
166 register SV *form = *++MARK;
167 register U16 *fpc;
168 register char *t;
169 register char *f;
170 register char *s;
171 register char *send;
172 register I32 arg;
173 register SV *sv;
174 char *item;
175 I32 itemsize;
176 I32 fieldsize;
177 I32 lines = 0;
178 bool chopspace = (strchr(chopset, ' ') != Nullch);
179 char *chophere;
180 char *linemark;
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181 double value;
182 bool gotsome;
183 STRLEN len;
184
55497cff 185 if (!SvMAGICAL(form) || !SvCOMPILED(form)) {
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186 SvREADONLY_off(form);
187 doparseform(form);
188 }
189
190 SvPV_force(formtarget, len);
191 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
192 t += len;
193 f = SvPV(form, len);
194 /* need to jump to the next word */
195 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
196
197 fpc = (U16*)s;
198
199 for (;;) {
200 DEBUG_f( {
201 char *name = "???";
202 arg = -1;
203 switch (*fpc) {
204 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
205 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
206 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
207 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
208 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
209
210 case FF_CHECKNL: name = "CHECKNL"; break;
211 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
212 case FF_SPACE: name = "SPACE"; break;
213 case FF_HALFSPACE: name = "HALFSPACE"; break;
214 case FF_ITEM: name = "ITEM"; break;
215 case FF_CHOP: name = "CHOP"; break;
216 case FF_LINEGLOB: name = "LINEGLOB"; break;
217 case FF_NEWLINE: name = "NEWLINE"; break;
218 case FF_MORE: name = "MORE"; break;
219 case FF_LINEMARK: name = "LINEMARK"; break;
220 case FF_END: name = "END"; break;
221 }
222 if (arg >= 0)
760ac839 223 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
a0d0e21e 224 else
760ac839 225 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
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226 } )
227 switch (*fpc++) {
228 case FF_LINEMARK:
229 linemark = t;
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230 lines++;
231 gotsome = FALSE;
232 break;
233
234 case FF_LITERAL:
235 arg = *fpc++;
236 while (arg--)
237 *t++ = *f++;
238 break;
239
240 case FF_SKIP:
241 f += *fpc++;
242 break;
243
244 case FF_FETCH:
245 arg = *fpc++;
246 f += arg;
247 fieldsize = arg;
248
249 if (MARK < SP)
250 sv = *++MARK;
251 else {
252 sv = &sv_no;
253 if (dowarn)
254 warn("Not enough format arguments");
255 }
256 break;
257
258 case FF_CHECKNL:
259 item = s = SvPV(sv, len);
260 itemsize = len;
261 if (itemsize > fieldsize)
262 itemsize = fieldsize;
263 send = chophere = s + itemsize;
264 while (s < send) {
265 if (*s & ~31)
266 gotsome = TRUE;
267 else if (*s == '\n')
268 break;
269 s++;
270 }
271 itemsize = s - item;
272 break;
273
274 case FF_CHECKCHOP:
275 item = s = SvPV(sv, len);
276 itemsize = len;
277 if (itemsize <= fieldsize) {
278 send = chophere = s + itemsize;
279 while (s < send) {
280 if (*s == '\r') {
281 itemsize = s - item;
282 break;
283 }
284 if (*s++ & ~31)
285 gotsome = TRUE;
286 }
287 }
288 else {
289 itemsize = fieldsize;
290 send = chophere = s + itemsize;
291 while (s < send || (s == send && isSPACE(*s))) {
292 if (isSPACE(*s)) {
293 if (chopspace)
294 chophere = s;
295 if (*s == '\r')
296 break;
297 }
298 else {
299 if (*s & ~31)
300 gotsome = TRUE;
301 if (strchr(chopset, *s))
302 chophere = s + 1;
303 }
304 s++;
305 }
306 itemsize = chophere - item;
307 }
308 break;
309
310 case FF_SPACE:
311 arg = fieldsize - itemsize;
312 if (arg) {
313 fieldsize -= arg;
314 while (arg-- > 0)
315 *t++ = ' ';
316 }
317 break;
318
319 case FF_HALFSPACE:
320 arg = fieldsize - itemsize;
321 if (arg) {
322 arg /= 2;
323 fieldsize -= arg;
324 while (arg-- > 0)
325 *t++ = ' ';
326 }
327 break;
328
329 case FF_ITEM:
330 arg = itemsize;
331 s = item;
332 while (arg--) {
333#if 'z' - 'a' != 25
334 int ch = *t++ = *s++;
335 if (!iscntrl(ch))
336 t[-1] = ' ';
337#else
338 if ( !((*t++ = *s++) & ~31) )
339 t[-1] = ' ';
340#endif
341
342 }
343 break;
344
345 case FF_CHOP:
346 s = chophere;
347 if (chopspace) {
348 while (*s && isSPACE(*s))
349 s++;
350 }
351 sv_chop(sv,s);
352 break;
353
354 case FF_LINEGLOB:
355 item = s = SvPV(sv, len);
356 itemsize = len;
357 if (itemsize) {
358 gotsome = TRUE;
359 send = s + itemsize;
360 while (s < send) {
361 if (*s++ == '\n') {
362 if (s == send)
363 itemsize--;
364 else
365 lines++;
366 }
367 }
368 SvCUR_set(formtarget, t - SvPVX(formtarget));
369 sv_catpvn(formtarget, item, itemsize);
370 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
371 t = SvPVX(formtarget) + SvCUR(formtarget);
372 }
373 break;
374
375 case FF_DECIMAL:
376 /* If the field is marked with ^ and the value is undefined,
377 blank it out. */
378 arg = *fpc++;
379 if ((arg & 512) && !SvOK(sv)) {
380 arg = fieldsize;
381 while (arg--)
382 *t++ = ' ';
383 break;
384 }
385 gotsome = TRUE;
386 value = SvNV(sv);
bbce6d69 387 /* Formats aren't yet marked for locales, so assume "yes". */
36477c24 388 SET_NUMERIC_LOCAL();
a0d0e21e
LW
389 if (arg & 256) {
390 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
391 } else {
392 sprintf(t, "%*.0f", (int) fieldsize, value);
393 }
394 t += fieldsize;
395 break;
396
397 case FF_NEWLINE:
398 f++;
399 while (t-- > linemark && *t == ' ') ;
400 t++;
401 *t++ = '\n';
402 break;
403
404 case FF_BLANK:
405 arg = *fpc++;
406 if (gotsome) {
407 if (arg) { /* repeat until fields exhausted? */
408 *t = '\0';
409 SvCUR_set(formtarget, t - SvPVX(formtarget));
410 lines += FmLINES(formtarget);
411 if (lines == 200) {
412 arg = t - linemark;
413 if (strnEQ(linemark, linemark - arg, arg))
414 DIE("Runaway format");
415 }
416 FmLINES(formtarget) = lines;
417 SP = ORIGMARK;
418 RETURNOP(cLISTOP->op_first);
419 }
420 }
421 else {
422 t = linemark;
423 lines--;
424 }
425 break;
426
427 case FF_MORE:
428 if (itemsize) {
429 arg = fieldsize - itemsize;
430 if (arg) {
431 fieldsize -= arg;
432 while (arg-- > 0)
433 *t++ = ' ';
434 }
435 s = t - 3;
436 if (strnEQ(s," ",3)) {
437 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
438 s--;
439 }
440 *s++ = '.';
441 *s++ = '.';
442 *s++ = '.';
443 }
444 break;
445
446 case FF_END:
447 *t = '\0';
448 SvCUR_set(formtarget, t - SvPVX(formtarget));
449 FmLINES(formtarget) += lines;
450 SP = ORIGMARK;
451 RETPUSHYES;
452 }
453 }
454}
455
456PP(pp_grepstart)
457{
458 dSP;
459 SV *src;
460
461 if (stack_base + *markstack_ptr == sp) {
462 (void)POPMARK;
54310121 463 if (GIMME_V == G_SCALAR)
a0d0e21e
LW
464 XPUSHs(&sv_no);
465 RETURNOP(op->op_next->op_next);
466 }
467 stack_sp = stack_base + *markstack_ptr + 1;
468 pp_pushmark(); /* push dst */
469 pp_pushmark(); /* push src */
470 ENTER; /* enter outer scope */
471
472 SAVETMPS;
473 SAVESPTR(GvSV(defgv));
474
475 ENTER; /* enter inner scope */
476 SAVESPTR(curpm);
477
478 src = stack_base[*markstack_ptr];
479 SvTEMP_off(src);
480 GvSV(defgv) = src;
481
482 PUTBACK;
483 if (op->op_type == OP_MAPSTART)
484 pp_pushmark(); /* push top */
485 return ((LOGOP*)op->op_next)->op_other;
486}
487
488PP(pp_mapstart)
489{
490 DIE("panic: mapstart"); /* uses grepstart */
491}
492
493PP(pp_mapwhile)
494{
495 dSP;
496 I32 diff = (sp - stack_base) - *markstack_ptr;
497 I32 count;
498 I32 shift;
499 SV** src;
500 SV** dst;
501
502 ++markstack_ptr[-1];
503 if (diff) {
504 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
505 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
506 count = (sp - stack_base) - markstack_ptr[-1] + 2;
507
508 EXTEND(sp,shift);
509 src = sp;
510 dst = (sp += shift);
511 markstack_ptr[-1] += shift;
512 *markstack_ptr += shift;
513 while (--count)
514 *dst-- = *src--;
515 }
516 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
517 ++diff;
518 while (--diff)
519 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
520 }
521 LEAVE; /* exit inner scope */
522
523 /* All done yet? */
524 if (markstack_ptr[-1] > *markstack_ptr) {
525 I32 items;
54310121 526 I32 gimme = GIMME_V;
a0d0e21e
LW
527
528 (void)POPMARK; /* pop top */
529 LEAVE; /* exit outer scope */
530 (void)POPMARK; /* pop src */
531 items = --*markstack_ptr - markstack_ptr[-1];
532 (void)POPMARK; /* pop dst */
533 SP = stack_base + POPMARK; /* pop original mark */
54310121 534 if (gimme == G_SCALAR) {
a0d0e21e
LW
535 dTARGET;
536 XPUSHi(items);
a0d0e21e 537 }
54310121
PP
538 else if (gimme == G_ARRAY)
539 SP += items;
a0d0e21e
LW
540 RETURN;
541 }
542 else {
543 SV *src;
544
545 ENTER; /* enter inner scope */
546 SAVESPTR(curpm);
547
548 src = stack_base[markstack_ptr[-1]];
549 SvTEMP_off(src);
550 GvSV(defgv) = src;
551
552 RETURNOP(cLOGOP->op_other);
553 }
554}
555
556
557PP(pp_sort)
558{
559 dSP; dMARK; dORIGMARK;
560 register SV **up;
561 SV **myorigmark = ORIGMARK;
562 register I32 max;
563 HV *stash;
564 GV *gv;
565 CV *cv;
566 I32 gimme = GIMME;
567 OP* nextop = op->op_next;
568
569 if (gimme != G_ARRAY) {
570 SP = MARK;
571 RETPUSHUNDEF;
572 }
573
574 if (op->op_flags & OPf_STACKED) {
575 ENTER;
576 if (op->op_flags & OPf_SPECIAL) {
577 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
578 kid = kUNOP->op_first; /* pass rv2gv */
579 kid = kUNOP->op_first; /* pass leave */
580 sortcop = kid->op_next;
581 stash = curcop->cop_stash;
582 }
583 else {
584 cv = sv_2cv(*++MARK, &stash, &gv, 0);
585 if (!(cv && CvROOT(cv))) {
586 if (gv) {
587 SV *tmpstr = sv_newmortal();
e5cf08de 588 gv_efullname3(tmpstr, gv, Nullch);
a0d0e21e
LW
589 if (cv && CvXSUB(cv))
590 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
591 DIE("Undefined sort subroutine \"%s\" called",
592 SvPVX(tmpstr));
593 }
594 if (cv) {
595 if (CvXSUB(cv))
596 DIE("Xsub called in sort");
597 DIE("Undefined subroutine in sort");
598 }
599 DIE("Not a CODE reference in sort");
600 }
601 sortcop = CvSTART(cv);
602 SAVESPTR(CvROOT(cv)->op_ppaddr);
603 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
604
605 SAVESPTR(curpad);
606 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
607 }
608 }
609 else {
610 sortcop = Nullop;
611 stash = curcop->cop_stash;
612 }
613
614 up = myorigmark + 1;
615 while (MARK < SP) { /* This may or may not shift down one here. */
616 /*SUPPRESS 560*/
617 if (*up = *++MARK) { /* Weed out nulls. */
9f8d30d5
CS
618 SvTEMP_off(*up);
619 if (!sortcop && !SvPOK(*up))
a0d0e21e 620 (void)sv_2pv(*up, &na);
a0d0e21e
LW
621 up++;
622 }
623 }
624 max = --up - myorigmark;
625 if (sortcop) {
626 if (max > 1) {
627 AV *oldstack;
628 CONTEXT *cx;
629 SV** newsp;
54310121 630 bool oldcatch = CATCH_GET;
a0d0e21e
LW
631
632 SAVETMPS;
633 SAVESPTR(op);
634
1ce6579f 635 oldstack = curstack;
a0d0e21e
LW
636 if (!sortstack) {
637 sortstack = newAV();
638 AvREAL_off(sortstack);
639 av_extend(sortstack, 32);
640 }
54310121 641 CATCH_SET(TRUE);
1ce6579f 642 SWITCHSTACK(curstack, sortstack);
a0d0e21e
LW
643 if (sortstash != stash) {
644 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
645 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
646 sortstash = stash;
647 }
648
649 SAVESPTR(GvSV(firstgv));
650 SAVESPTR(GvSV(secondgv));
0a753a76 651 PUSHBLOCK(cx, CXt_NULL, stack_base);
a0d0e21e
LW
652 sortcxix = cxstack_ix;
653
654 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
655
656 POPBLOCK(cx,curpm);
657 SWITCHSTACK(sortstack, oldstack);
54310121 658 CATCH_SET(oldcatch);
a0d0e21e
LW
659 }
660 LEAVE;
661 }
662 else {
663 if (max > 1) {
664 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
bbce6d69
PP
665 qsort((char*)(ORIGMARK+1), max, sizeof(SV*),
666 (op->op_private & OPpLOCALE) ? sortcmp_locale : sortcmp);
a0d0e21e
LW
667 }
668 }
669 stack_sp = ORIGMARK + max;
670 return nextop;
671}
672
673/* Range stuff. */
674
675PP(pp_range)
676{
677 if (GIMME == G_ARRAY)
678 return cCONDOP->op_true;
679 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
680}
681
682PP(pp_flip)
683{
684 dSP;
685
686 if (GIMME == G_ARRAY) {
687 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
688 }
689 else {
690 dTOPss;
691 SV *targ = PAD_SV(op->op_targ);
692
693 if ((op->op_private & OPpFLIP_LINENUM)
694 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
695 : SvTRUE(sv) ) {
696 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
697 if (op->op_flags & OPf_SPECIAL) {
698 sv_setiv(targ, 1);
699 RETURN;
700 }
701 else {
702 sv_setiv(targ, 0);
703 sp--;
704 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
705 }
706 }
707 sv_setpv(TARG, "");
708 SETs(targ);
709 RETURN;
710 }
711}
712
713PP(pp_flop)
714{
715 dSP;
716
717 if (GIMME == G_ARRAY) {
718 dPOPPOPssrl;
719 register I32 i;
720 register SV *sv;
721 I32 max;
722
4633a7c4 723 if (SvNIOKp(left) || !SvPOKp(left) ||
bbce6d69
PP
724 (looks_like_number(left) && *SvPVX(left) != '0') )
725 {
a0d0e21e
LW
726 i = SvIV(left);
727 max = SvIV(right);
bbce6d69
PP
728 if (max >= i) {
729 EXTEND_MORTAL(max - i + 1);
a0d0e21e 730 EXTEND(SP, max - i + 1);
bbce6d69 731 }
a0d0e21e 732 while (i <= max) {
bbce6d69 733 sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
734 PUSHs(sv);
735 }
736 }
737 else {
738 SV *final = sv_mortalcopy(right);
739 STRLEN len;
740 char *tmps = SvPV(final, len);
741
742 sv = sv_mortalcopy(left);
4633a7c4 743 while (!SvNIOKp(sv) && SvCUR(sv) <= len &&
a0d0e21e
LW
744 strNE(SvPVX(sv),tmps) ) {
745 XPUSHs(sv);
746 sv = sv_2mortal(newSVsv(sv));
747 sv_inc(sv);
748 }
749 if (strEQ(SvPVX(sv),tmps))
750 XPUSHs(sv);
751 }
752 }
753 else {
754 dTOPss;
755 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
756 sv_inc(targ);
757 if ((op->op_private & OPpFLIP_LINENUM)
758 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
759 : SvTRUE(sv) ) {
760 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
761 sv_catpv(targ, "E0");
762 }
763 SETs(targ);
764 }
765
766 RETURN;
767}
768
769/* Control. */
770
771static I32
772dopoptolabel(label)
773char *label;
774{
775 register I32 i;
776 register CONTEXT *cx;
777
778 for (i = cxstack_ix; i >= 0; i--) {
779 cx = &cxstack[i];
780 switch (cx->cx_type) {
781 case CXt_SUBST:
782 if (dowarn)
783 warn("Exiting substitution via %s", op_name[op->op_type]);
784 break;
785 case CXt_SUB:
786 if (dowarn)
787 warn("Exiting subroutine via %s", op_name[op->op_type]);
788 break;
789 case CXt_EVAL:
790 if (dowarn)
791 warn("Exiting eval via %s", op_name[op->op_type]);
792 break;
0a753a76
PP
793 case CXt_NULL:
794 if (dowarn)
795 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
796 return -1;
a0d0e21e
LW
797 case CXt_LOOP:
798 if (!cx->blk_loop.label ||
799 strNE(label, cx->blk_loop.label) ) {
68dc0745
PP
800 DEBUG_l(deb("(Skipping label #%ld %s)\n",
801 (long)i, cx->blk_loop.label));
a0d0e21e
LW
802 continue;
803 }
68dc0745 804 DEBUG_l( deb("(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
805 return i;
806 }
807 }
808 return i;
809}
810
e50aee73
AD
811I32
812dowantarray()
813{
54310121
PP
814 I32 gimme = block_gimme();
815 return (gimme == G_VOID) ? G_SCALAR : gimme;
816}
817
818I32
819block_gimme()
820{
e50aee73
AD
821 I32 cxix;
822
823 cxix = dopoptosub(cxstack_ix);
824 if (cxix < 0)
825 return G_SCALAR;
826
54310121
PP
827 switch (cxstack[cxix].blk_gimme) {
828 case G_VOID:
829 return G_VOID;
830 case G_SCALAR:
e50aee73 831 return G_SCALAR;
54310121
PP
832 case G_ARRAY:
833 return G_ARRAY;
834 default:
835 croak("panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
836 }
e50aee73
AD
837}
838
a0d0e21e
LW
839static I32
840dopoptosub(startingblock)
841I32 startingblock;
842{
843 I32 i;
844 register CONTEXT *cx;
845 for (i = startingblock; i >= 0; i--) {
846 cx = &cxstack[i];
847 switch (cx->cx_type) {
848 default:
849 continue;
850 case CXt_EVAL:
851 case CXt_SUB:
68dc0745 852 DEBUG_l( deb("(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
853 return i;
854 }
855 }
856 return i;
857}
858
859static I32
860dopoptoeval(startingblock)
861I32 startingblock;
862{
863 I32 i;
864 register CONTEXT *cx;
865 for (i = startingblock; i >= 0; i--) {
866 cx = &cxstack[i];
867 switch (cx->cx_type) {
868 default:
869 continue;
870 case CXt_EVAL:
68dc0745 871 DEBUG_l( deb("(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
872 return i;
873 }
874 }
875 return i;
876}
877
878static I32
879dopoptoloop(startingblock)
880I32 startingblock;
881{
882 I32 i;
883 register CONTEXT *cx;
884 for (i = startingblock; i >= 0; i--) {
885 cx = &cxstack[i];
886 switch (cx->cx_type) {
887 case CXt_SUBST:
888 if (dowarn)
5f05dabc 889 warn("Exiting substitution via %s", op_name[op->op_type]);
a0d0e21e
LW
890 break;
891 case CXt_SUB:
892 if (dowarn)
893 warn("Exiting subroutine via %s", op_name[op->op_type]);
894 break;
895 case CXt_EVAL:
896 if (dowarn)
897 warn("Exiting eval via %s", op_name[op->op_type]);
898 break;
0a753a76
PP
899 case CXt_NULL:
900 if (dowarn)
901 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
902 return -1;
a0d0e21e 903 case CXt_LOOP:
68dc0745 904 DEBUG_l( deb("(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
905 return i;
906 }
907 }
908 return i;
909}
910
911void
912dounwind(cxix)
913I32 cxix;
914{
915 register CONTEXT *cx;
916 SV **newsp;
917 I32 optype;
918
919 while (cxstack_ix > cxix) {
920 cx = &cxstack[cxstack_ix--];
760ac839 921 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
a0d0e21e
LW
922 block_type[cx->cx_type]));
923 /* Note: we don't need to restore the base context info till the end. */
924 switch (cx->cx_type) {
925 case CXt_SUB:
926 POPSUB(cx);
927 break;
928 case CXt_EVAL:
929 POPEVAL(cx);
930 break;
931 case CXt_LOOP:
932 POPLOOP(cx);
933 break;
0a753a76 934 case CXt_NULL:
a0d0e21e
LW
935 case CXt_SUBST:
936 break;
937 }
938 }
939}
940
a0d0e21e
LW
941OP *
942die_where(message)
943char *message;
944{
945 if (in_eval) {
946 I32 cxix;
947 register CONTEXT *cx;
948 I32 gimme;
949 SV **newsp;
950
4633a7c4
LW
951 if (in_eval & 4) {
952 SV **svp;
953 STRLEN klen = strlen(message);
954
955 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
956 if (svp) {
957 if (!SvIOK(*svp)) {
958 static char prefix[] = "\t(in cleanup) ";
959 sv_upgrade(*svp, SVt_IV);
960 (void)SvIOK_only(*svp);
961 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
962 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
963 sv_catpvn(GvSV(errgv), message, klen);
964 }
965 sv_inc(*svp);
966 }
967 }
968 else
c07a80fd 969 sv_setpv(GvSV(errgv), message);
4633a7c4 970
a0d0e21e
LW
971 cxix = dopoptoeval(cxstack_ix);
972 if (cxix >= 0) {
973 I32 optype;
974
975 if (cxix < cxstack_ix)
976 dounwind(cxix);
977
978 POPBLOCK(cx,curpm);
979 if (cx->cx_type != CXt_EVAL) {
760ac839 980 PerlIO_printf(PerlIO_stderr(), "panic: die %s", message);
a0d0e21e
LW
981 my_exit(1);
982 }
983 POPEVAL(cx);
984
985 if (gimme == G_SCALAR)
986 *++newsp = &sv_undef;
987 stack_sp = newsp;
988
989 LEAVE;
748a9306 990
a0d0e21e 991 if (optype == OP_REQUIRE)
4633a7c4 992 DIE("%s", SvPVx(GvSV(errgv), na));
a0d0e21e
LW
993 return pop_return();
994 }
995 }
760ac839
LW
996 PerlIO_printf(PerlIO_stderr(), "%s",message);
997 PerlIO_flush(PerlIO_stderr());
f86702cc
PP
998 my_failure_exit();
999 /* NOTREACHED */
a0d0e21e
LW
1000 return 0;
1001}
1002
1003PP(pp_xor)
1004{
1005 dSP; dPOPTOPssrl;
1006 if (SvTRUE(left) != SvTRUE(right))
1007 RETSETYES;
1008 else
1009 RETSETNO;
1010}
1011
1012PP(pp_andassign)
1013{
1014 dSP;
1015 if (!SvTRUE(TOPs))
1016 RETURN;
1017 else
1018 RETURNOP(cLOGOP->op_other);
1019}
1020
1021PP(pp_orassign)
1022{
1023 dSP;
1024 if (SvTRUE(TOPs))
1025 RETURN;
1026 else
1027 RETURNOP(cLOGOP->op_other);
1028}
1029
1030#ifdef DEPRECATED
1031PP(pp_entersubr)
1032{
1033 dSP;
1034 SV** mark = (stack_base + *markstack_ptr + 1);
1035 SV* cv = *mark;
1036 while (mark < sp) { /* emulate old interface */
1037 *mark = mark[1];
1038 mark++;
1039 }
1040 *sp = cv;
1041 return pp_entersub();
1042}
1043#endif
1044
1045PP(pp_caller)
1046{
1047 dSP;
1048 register I32 cxix = dopoptosub(cxstack_ix);
1049 register CONTEXT *cx;
1050 I32 dbcxix;
54310121 1051 I32 gimme;
a0d0e21e
LW
1052 SV *sv;
1053 I32 count = 0;
1054
1055 if (MAXARG)
1056 count = POPi;
1057 EXTEND(SP, 6);
1058 for (;;) {
1059 if (cxix < 0) {
1060 if (GIMME != G_ARRAY)
1061 RETPUSHUNDEF;
1062 RETURN;
1063 }
1064 if (DBsub && cxix >= 0 &&
1065 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1066 count++;
1067 if (!count--)
1068 break;
1069 cxix = dopoptosub(cxix - 1);
1070 }
1071 cx = &cxstack[cxix];
06a5b730
PP
1072 if (cxstack[cxix].cx_type == CXt_SUB) {
1073 dbcxix = dopoptosub(cxix - 1);
1074 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1075 field below is defined for any cx. */
1076 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1077 cx = &cxstack[dbcxix];
1078 }
1079
a0d0e21e
LW
1080 if (GIMME != G_ARRAY) {
1081 dTARGET;
1082
1083 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1084 PUSHs(TARG);
1085 RETURN;
1086 }
a0d0e21e
LW
1087
1088 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1089 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1090 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1091 if (!MAXARG)
1092 RETURN;
06a5b730 1093 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
a0d0e21e 1094 sv = NEWSV(49, 0);
e5cf08de 1095 gv_efullname3(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch);
a0d0e21e
LW
1096 PUSHs(sv_2mortal(sv));
1097 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1098 }
1099 else {
1100 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1101 PUSHs(sv_2mortal(newSViv(0)));
1102 }
54310121
PP
1103 gimme = (I32)cx->blk_gimme;
1104 if (gimme == G_VOID)
1105 PUSHs(&sv_undef);
1106 else
1107 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
4633a7c4 1108 if (cx->cx_type == CXt_EVAL) {
06a5b730 1109 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1110 PUSHs(cx->blk_eval.cur_text);
06a5b730
PP
1111 PUSHs(&sv_no);
1112 }
1113 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1114 /* Require, put the name. */
1115 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1116 PUSHs(&sv_yes);
1117 }
4633a7c4
LW
1118 }
1119 else if (cx->cx_type == CXt_SUB &&
1120 cx->blk_sub.hasargs &&
1121 curcop->cop_stash == debstash)
1122 {
a0d0e21e
LW
1123 AV *ary = cx->blk_sub.argarray;
1124 int off = AvARRAY(ary) - AvALLOC(ary);
1125
1126 if (!dbargs) {
1127 GV* tmpgv;
1128 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1129 SVt_PVAV)));
a5f75d66 1130 GvMULTI_on(tmpgv);
a0d0e21e
LW
1131 AvREAL_off(dbargs); /* XXX Should be REIFY */
1132 }
1133
1134 if (AvMAX(dbargs) < AvFILL(ary) + off)
1135 av_extend(dbargs, AvFILL(ary) + off);
1136 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1137 AvFILL(dbargs) = AvFILL(ary) + off;
1138 }
1139 RETURN;
1140}
1141
1142static int
1143sortcv(a, b)
1144const void *a;
1145const void *b;
1146{
9607fc9c
PP
1147 SV * const *str1 = (SV * const *)a;
1148 SV * const *str2 = (SV * const *)b;
748a9306 1149 I32 oldsaveix = savestack_ix;
a0d0e21e
LW
1150 I32 oldscopeix = scopestack_ix;
1151 I32 result;
1152 GvSV(firstgv) = *str1;
1153 GvSV(secondgv) = *str2;
1154 stack_sp = stack_base;
1155 op = sortcop;
a6c477ed 1156 runops();
a0d0e21e
LW
1157 if (stack_sp != stack_base + 1)
1158 croak("Sort subroutine didn't return single value");
748a9306 1159 if (!SvNIOKp(*stack_sp))
a0d0e21e
LW
1160 croak("Sort subroutine didn't return a numeric value");
1161 result = SvIV(*stack_sp);
1162 while (scopestack_ix > oldscopeix) {
1163 LEAVE;
1164 }
748a9306 1165 leave_scope(oldsaveix);
a0d0e21e
LW
1166 return result;
1167}
1168
1169static int
1170sortcmp(a, b)
1171const void *a;
1172const void *b;
1173{
9607fc9c 1174 return sv_cmp(*(SV * const *)a, *(SV * const *)b);
bbce6d69 1175}
e5cf08de 1176
bbce6d69
PP
1177static int
1178sortcmp_locale(a, b)
1179const void *a;
1180const void *b;
1181{
9607fc9c 1182 return sv_cmp_locale(*(SV * const *)a, *(SV * const *)b);
a0d0e21e
LW
1183}
1184
1185PP(pp_reset)
1186{
1187 dSP;
1188 char *tmps;
1189
1190 if (MAXARG < 1)
1191 tmps = "";
1192 else
1193 tmps = POPp;
1194 sv_reset(tmps, curcop->cop_stash);
1195 PUSHs(&sv_yes);
1196 RETURN;
1197}
1198
1199PP(pp_lineseq)
1200{
1201 return NORMAL;
1202}
1203
1204PP(pp_dbstate)
1205{
1206 curcop = (COP*)op;
1207 TAINT_NOT; /* Each statement is presumed innocent */
1208 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1209 FREETMPS;
1210
1211 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1212 {
1213 SV **sp;
1214 register CV *cv;
1215 register CONTEXT *cx;
748a9306 1216 I32 gimme = G_ARRAY;
a0d0e21e
LW
1217 I32 hasargs;
1218 GV *gv;
1219
a0d0e21e
LW
1220 gv = DBgv;
1221 cv = GvCV(gv);
a0d0e21e
LW
1222 if (!cv)
1223 DIE("No DB::DB routine defined");
1224
06a5b730 1225 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1226 return NORMAL;
748a9306 1227
4633a7c4
LW
1228 ENTER;
1229 SAVETMPS;
1230
748a9306 1231 SAVEI32(debug);
55497cff 1232 SAVESTACK_POS();
748a9306
LW
1233 debug = 0;
1234 hasargs = 0;
1235 sp = stack_sp;
1236
a0d0e21e 1237 push_return(op->op_next);
748a9306 1238 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e
LW
1239 PUSHSUB(cx);
1240 CvDEPTH(cv)++;
1241 (void)SvREFCNT_inc(cv);
1242 SAVESPTR(curpad);
1243 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1244 RETURNOP(CvSTART(cv));
1245 }
1246 else
1247 return NORMAL;
1248}
1249
1250PP(pp_scope)
1251{
1252 return NORMAL;
1253}
1254
1255PP(pp_enteriter)
1256{
1257 dSP; dMARK;
1258 register CONTEXT *cx;
54310121 1259 I32 gimme = GIMME_V;
a0d0e21e
LW
1260 SV **svp;
1261
4633a7c4
LW
1262 ENTER;
1263 SAVETMPS;
1264
a0d0e21e
LW
1265 if (op->op_targ)
1266 svp = &curpad[op->op_targ]; /* "my" variable */
1267 else
1268 svp = &GvSV((GV*)POPs); /* symbol table variable */
1269
4633a7c4
LW
1270 SAVESPTR(*svp);
1271
a0d0e21e
LW
1272 ENTER;
1273
1274 PUSHBLOCK(cx, CXt_LOOP, SP);
1275 PUSHLOOP(cx, svp, MARK);
44a8e56a
PP
1276 if (op->op_flags & OPf_STACKED)
1277 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
4633a7c4 1278 else {
1ce6579f
PP
1279 cx->blk_loop.iterary = curstack;
1280 AvFILL(curstack) = sp - stack_base;
4633a7c4
LW
1281 cx->blk_loop.iterix = MARK - stack_base;
1282 }
a0d0e21e
LW
1283
1284 RETURN;
1285}
1286
1287PP(pp_enterloop)
1288{
1289 dSP;
1290 register CONTEXT *cx;
54310121 1291 I32 gimme = GIMME_V;
a0d0e21e
LW
1292
1293 ENTER;
1294 SAVETMPS;
1295 ENTER;
1296
1297 PUSHBLOCK(cx, CXt_LOOP, SP);
1298 PUSHLOOP(cx, 0, SP);
1299
1300 RETURN;
1301}
1302
1303PP(pp_leaveloop)
1304{
1305 dSP;
1306 register CONTEXT *cx;
f86702cc 1307 struct block_loop cxloop;
a0d0e21e
LW
1308 I32 gimme;
1309 SV **newsp;
1310 PMOP *newpm;
1311 SV **mark;
1312
1313 POPBLOCK(cx,newpm);
4fdae800 1314 mark = newsp;
f86702cc
PP
1315 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1316
54310121
PP
1317 if (gimme == G_VOID)
1318 ; /* do nothing */
1319 else if (gimme == G_SCALAR) {
1320 if (mark < SP)
1321 *++newsp = sv_mortalcopy(*SP);
1322 else
1323 *++newsp = &sv_undef;
a0d0e21e
LW
1324 }
1325 else {
1326 while (mark < SP)
1327 *++newsp = sv_mortalcopy(*++mark);
1328 }
f86702cc
PP
1329 SP = newsp;
1330 PUTBACK;
1331
1332 POPLOOP2(); /* Stack values are safe: release loop vars ... */
1333 curpm = newpm; /* ... and pop $1 et al */
1334
a0d0e21e
LW
1335 LEAVE;
1336 LEAVE;
1337
f86702cc 1338 return NORMAL;
a0d0e21e
LW
1339}
1340
1341PP(pp_return)
1342{
1343 dSP; dMARK;
1344 I32 cxix;
1345 register CONTEXT *cx;
f86702cc
PP
1346 struct block_sub cxsub;
1347 bool popsub2 = FALSE;
a0d0e21e
LW
1348 I32 gimme;
1349 SV **newsp;
1350 PMOP *newpm;
1351 I32 optype = 0;
1352
1ce6579f 1353 if (curstack == sortstack) {
a0d0e21e 1354 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9
AD
1355 if (cxstack_ix > sortcxix)
1356 dounwind(sortcxix);
1ce6579f 1357 AvARRAY(curstack)[1] = *SP;
a0d0e21e
LW
1358 stack_sp = stack_base + 1;
1359 return 0;
1360 }
1361 }
1362
1363 cxix = dopoptosub(cxstack_ix);
1364 if (cxix < 0)
1365 DIE("Can't return outside a subroutine");
1366 if (cxix < cxstack_ix)
1367 dounwind(cxix);
1368
1369 POPBLOCK(cx,newpm);
1370 switch (cx->cx_type) {
1371 case CXt_SUB:
f86702cc
PP
1372 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1373 popsub2 = TRUE;
a0d0e21e
LW
1374 break;
1375 case CXt_EVAL:
1376 POPEVAL(cx);
748a9306
LW
1377 if (optype == OP_REQUIRE &&
1378 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1379 {
54310121 1380 /* Unassume the success we assumed earlier. */
748a9306
LW
1381 char *name = cx->blk_eval.old_name;
1382 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1383 DIE("%s did not return a true value", name);
1384 }
a0d0e21e
LW
1385 break;
1386 default:
1387 DIE("panic: return");
a0d0e21e
LW
1388 }
1389
1390 if (gimme == G_SCALAR) {
1391 if (MARK < SP)
f86702cc
PP
1392 *++newsp = (popsub2 && SvTEMP(*SP))
1393 ? *SP : sv_mortalcopy(*SP);
a0d0e21e
LW
1394 else
1395 *++newsp = &sv_undef;
a0d0e21e 1396 }
54310121 1397 else if (gimme == G_ARRAY) {
f86702cc
PP
1398 while (++MARK <= SP)
1399 *++newsp = (popsub2 && SvTEMP(*MARK))
1400 ? *MARK : sv_mortalcopy(*MARK);
a0d0e21e 1401 }
a0d0e21e
LW
1402 stack_sp = newsp;
1403
f86702cc
PP
1404 /* Stack values are safe: */
1405 if (popsub2) {
1406 POPSUB2(); /* release CV and @_ ... */
1407 }
1408 curpm = newpm; /* ... and pop $1 et al */
1409
a0d0e21e
LW
1410 LEAVE;
1411 return pop_return();
1412}
1413
1414PP(pp_last)
1415{
1416 dSP;
1417 I32 cxix;
1418 register CONTEXT *cx;
f86702cc
PP
1419 struct block_loop cxloop;
1420 struct block_sub cxsub;
1421 I32 pop2 = 0;
a0d0e21e
LW
1422 I32 gimme;
1423 I32 optype;
1424 OP *nextop;
1425 SV **newsp;
1426 PMOP *newpm;
1427 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1428
1429 if (op->op_flags & OPf_SPECIAL) {
1430 cxix = dopoptoloop(cxstack_ix);
1431 if (cxix < 0)
1432 DIE("Can't \"last\" outside a block");
1433 }
1434 else {
1435 cxix = dopoptolabel(cPVOP->op_pv);
1436 if (cxix < 0)
1437 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1438 }
1439 if (cxix < cxstack_ix)
1440 dounwind(cxix);
1441
1442 POPBLOCK(cx,newpm);
1443 switch (cx->cx_type) {
1444 case CXt_LOOP:
f86702cc
PP
1445 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1446 pop2 = CXt_LOOP;
4fdae800 1447 nextop = cxloop.last_op->op_next;
a0d0e21e 1448 break;
f86702cc
PP
1449 case CXt_SUB:
1450 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1451 pop2 = CXt_SUB;
a0d0e21e
LW
1452 nextop = pop_return();
1453 break;
f86702cc
PP
1454 case CXt_EVAL:
1455 POPEVAL(cx);
a0d0e21e
LW
1456 nextop = pop_return();
1457 break;
1458 default:
1459 DIE("panic: last");
a0d0e21e
LW
1460 }
1461
1462 if (gimme == G_SCALAR) {
f86702cc
PP
1463 if (MARK < SP)
1464 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1465 ? *SP : sv_mortalcopy(*SP);
a0d0e21e
LW
1466 else
1467 *++newsp = &sv_undef;
1468 }
54310121 1469 else if (gimme == G_ARRAY) {
f86702cc
PP
1470 while (++MARK <= SP)
1471 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1472 ? *MARK : sv_mortalcopy(*MARK);
1473 }
1474 SP = newsp;
1475 PUTBACK;
1476
1477 /* Stack values are safe: */
1478 switch (pop2) {
1479 case CXt_LOOP:
1480 POPLOOP2(); /* release loop vars ... */
4fdae800 1481 LEAVE;
f86702cc
PP
1482 break;
1483 case CXt_SUB:
1484 POPSUB2(); /* release CV and @_ ... */
1485 break;
a0d0e21e 1486 }
f86702cc 1487 curpm = newpm; /* ... and pop $1 et al */
a0d0e21e
LW
1488
1489 LEAVE;
f86702cc 1490 return nextop;
a0d0e21e
LW
1491}
1492
1493PP(pp_next)
1494{
1495 I32 cxix;
1496 register CONTEXT *cx;
1497 I32 oldsave;
1498
1499 if (op->op_flags & OPf_SPECIAL) {
1500 cxix = dopoptoloop(cxstack_ix);
1501 if (cxix < 0)
1502 DIE("Can't \"next\" outside a block");
1503 }
1504 else {
1505 cxix = dopoptolabel(cPVOP->op_pv);
1506 if (cxix < 0)
1507 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1508 }
1509 if (cxix < cxstack_ix)
1510 dounwind(cxix);
1511
1512 TOPBLOCK(cx);
1513 oldsave = scopestack[scopestack_ix - 1];
1514 LEAVE_SCOPE(oldsave);
1515 return cx->blk_loop.next_op;
1516}
1517
1518PP(pp_redo)
1519{
1520 I32 cxix;
1521 register CONTEXT *cx;
1522 I32 oldsave;
1523
1524 if (op->op_flags & OPf_SPECIAL) {
1525 cxix = dopoptoloop(cxstack_ix);
1526 if (cxix < 0)
1527 DIE("Can't \"redo\" outside a block");
1528 }
1529 else {
1530 cxix = dopoptolabel(cPVOP->op_pv);
1531 if (cxix < 0)
1532 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1533 }
1534 if (cxix < cxstack_ix)
1535 dounwind(cxix);
1536
1537 TOPBLOCK(cx);
1538 oldsave = scopestack[scopestack_ix - 1];
1539 LEAVE_SCOPE(oldsave);
1540 return cx->blk_loop.redo_op;
1541}
1542
1543static OP* lastgotoprobe;
1544
1545static OP *
1546dofindlabel(op,label,opstack)
1547OP *op;
1548char *label;
1549OP **opstack;
1550{
1551 OP *kid;
1552 OP **ops = opstack;
1553
1554 if (op->op_type == OP_LEAVE ||
1555 op->op_type == OP_SCOPE ||
1556 op->op_type == OP_LEAVELOOP ||
1557 op->op_type == OP_LEAVETRY)
1558 *ops++ = cUNOP->op_first;
1559 *ops = 0;
1560 if (op->op_flags & OPf_KIDS) {
1561 /* First try all the kids at this level, since that's likeliest. */
1562 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1563 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1564 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1565 return kid;
1566 }
1567 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1568 if (kid == lastgotoprobe)
1569 continue;
1570 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1571 if (ops > opstack &&
1572 (ops[-1]->op_type == OP_NEXTSTATE ||
1573 ops[-1]->op_type == OP_DBSTATE))
1574 *ops = kid;
1575 else
1576 *ops++ = kid;
1577 }
1578 if (op = dofindlabel(kid,label,ops))
1579 return op;
1580 }
1581 }
1582 *ops = 0;
1583 return 0;
1584}
1585
1586PP(pp_dump)
1587{
1588 return pp_goto(ARGS);
1589 /*NOTREACHED*/
1590}
1591
1592PP(pp_goto)
1593{
1594 dSP;
1595 OP *retop = 0;
1596 I32 ix;
1597 register CONTEXT *cx;
1598 OP *enterops[64];
1599 char *label;
1600 int do_dump = (op->op_type == OP_DUMP);
1601
1602 label = 0;
1603 if (op->op_flags & OPf_STACKED) {
1604 SV *sv = POPs;
1605
1606 /* This egregious kludge implements goto &subroutine */
1607 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1608 I32 cxix;
1609 register CONTEXT *cx;
1610 CV* cv = (CV*)SvRV(sv);
1611 SV** mark;
1612 I32 items = 0;
1613 I32 oldsave;
1614
4aa0a1f7
AD
1615 if (!CvROOT(cv) && !CvXSUB(cv)) {
1616 if (CvGV(cv)) {
1617 SV *tmpstr = sv_newmortal();
e5cf08de 1618 gv_efullname3(tmpstr, CvGV(cv), Nullch);
4aa0a1f7
AD
1619 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1620 }
1621 DIE("Goto undefined subroutine");
1622 }
1623
a0d0e21e
LW
1624 /* First do some returnish stuff. */
1625 cxix = dopoptosub(cxstack_ix);
1626 if (cxix < 0)
1627 DIE("Can't goto subroutine outside a subroutine");
1628 if (cxix < cxstack_ix)
1629 dounwind(cxix);
1630 TOPBLOCK(cx);
1631 mark = stack_sp;
1632 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1633 AV* av = cx->blk_sub.argarray;
1634
1635 items = AvFILL(av) + 1;
1ce6579f
PP
1636 stack_sp++;
1637 EXTEND(stack_sp, items); /* @_ could have been extended. */
1638 Copy(AvARRAY(av), stack_sp, items, SV*);
a0d0e21e 1639 stack_sp += items;
2c05e328 1640 SvREFCNT_dec(GvAV(defgv));
a0d0e21e 1641 GvAV(defgv) = cx->blk_sub.savearray;
a0d0e21e 1642 AvREAL_off(av);
4633a7c4 1643 av_clear(av);
a0d0e21e
LW
1644 }
1645 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1646 SvREFCNT_dec(cx->blk_sub.cv);
1647 oldsave = scopestack[scopestack_ix - 1];
1648 LEAVE_SCOPE(oldsave);
1649
1650 /* Now do some callish stuff. */
1651 SAVETMPS;
1652 if (CvXSUB(cv)) {
1653 if (CvOLDSTYLE(cv)) {
ecfc5424 1654 I32 (*fp3)_((int,int,int));
a0d0e21e
LW
1655 while (sp > mark) {
1656 sp[1] = sp[0];
1657 sp--;
1658 }
ecfc5424
AD
1659 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1660 items = (*fp3)(CvXSUBANY(cv).any_i32,
1661 mark - stack_base + 1,
1662 items);
a0d0e21e
LW
1663 sp = stack_base + items;
1664 }
1665 else {
1ce6579f 1666 stack_sp--; /* There is no cv arg. */
a0d0e21e
LW
1667 (void)(*CvXSUB(cv))(cv);
1668 }
1669 LEAVE;
1670 return pop_return();
1671 }
1672 else {
1673 AV* padlist = CvPADLIST(cv);
1674 SV** svp = AvARRAY(padlist);
1675 cx->blk_sub.cv = cv;
1676 cx->blk_sub.olddepth = CvDEPTH(cv);
1677 CvDEPTH(cv)++;
1678 if (CvDEPTH(cv) < 2)
1679 (void)SvREFCNT_inc(cv);
1680 else { /* save temporaries on recursion? */
1681 if (CvDEPTH(cv) == 100 && dowarn)
44a8e56a 1682 sub_crush_depth(cv);
a0d0e21e
LW
1683 if (CvDEPTH(cv) > AvFILL(padlist)) {
1684 AV *newpad = newAV();
4aa0a1f7 1685 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e
LW
1686 I32 ix = AvFILL((AV*)svp[1]);
1687 svp = AvARRAY(svp[0]);
748a9306 1688 for ( ;ix > 0; ix--) {
a0d0e21e 1689 if (svp[ix] != &sv_undef) {
748a9306 1690 char *name = SvPVX(svp[ix]);
5f05dabc
PP
1691 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
1692 || *name == '&')
1693 {
1694 /* outer lexical or anon code */
748a9306 1695 av_store(newpad, ix,
4aa0a1f7 1696 SvREFCNT_inc(oldpad[ix]) );
748a9306
LW
1697 }
1698 else { /* our own lexical */
1699 if (*name == '@')
1700 av_store(newpad, ix, sv = (SV*)newAV());
1701 else if (*name == '%')
1702 av_store(newpad, ix, sv = (SV*)newHV());
1703 else
1704 av_store(newpad, ix, sv = NEWSV(0,0));
1705 SvPADMY_on(sv);
1706 }
a0d0e21e
LW
1707 }
1708 else {
748a9306 1709 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e
LW
1710 SvPADTMP_on(sv);
1711 }
1712 }
1713 if (cx->blk_sub.hasargs) {
1714 AV* av = newAV();
1715 av_extend(av, 0);
1716 av_store(newpad, 0, (SV*)av);
1717 AvFLAGS(av) = AVf_REIFY;
1718 }
1719 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1720 AvFILL(padlist) = CvDEPTH(cv);
1721 svp = AvARRAY(padlist);
1722 }
1723 }
1724 SAVESPTR(curpad);
1725 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1726 if (cx->blk_sub.hasargs) {
1727 AV* av = (AV*)curpad[0];
1728 SV** ary;
1729
1730 cx->blk_sub.savearray = GvAV(defgv);
1731 cx->blk_sub.argarray = av;
2c05e328 1732 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
a0d0e21e
LW
1733 ++mark;
1734
1735 if (items >= AvMAX(av) + 1) {
1736 ary = AvALLOC(av);
1737 if (AvARRAY(av) != ary) {
1738 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1739 SvPVX(av) = (char*)ary;
1740 }
1741 if (items >= AvMAX(av) + 1) {
1742 AvMAX(av) = items - 1;
1743 Renew(ary,items+1,SV*);
1744 AvALLOC(av) = ary;
1745 SvPVX(av) = (char*)ary;
1746 }
1747 }
1748 Copy(mark,AvARRAY(av),items,SV*);
1749 AvFILL(av) = items - 1;
1750
1751 while (items--) {
1752 if (*mark)
1753 SvTEMP_off(*mark);
1754 mark++;
1755 }
1756 }
f967eb5f 1757 if (perldb && curstash != debstash) {
44a8e56a
PP
1758 /*
1759 * We do not care about using sv to call CV;
1760 * it's for informational purposes only.
1761 */
1ce6579f
PP
1762 SV *sv = GvSV(DBsub);
1763 save_item(sv);
e5cf08de 1764 gv_efullname3(sv, CvGV(cv), Nullch);
1ce6579f 1765 }
a0d0e21e
LW
1766 RETURNOP(CvSTART(cv));
1767 }
1768 }
1769 else
1770 label = SvPV(sv,na);
1771 }
1772 else if (op->op_flags & OPf_SPECIAL) {
1773 if (! do_dump)
1774 DIE("goto must have label");
1775 }
1776 else
1777 label = cPVOP->op_pv;
1778
1779 if (label && *label) {
1780 OP *gotoprobe = 0;
1781
1782 /* find label */
1783
1784 lastgotoprobe = 0;
1785 *enterops = 0;
1786 for (ix = cxstack_ix; ix >= 0; ix--) {
1787 cx = &cxstack[ix];
1788 switch (cx->cx_type) {
1789 case CXt_SUB:
1790 gotoprobe = CvROOT(cx->blk_sub.cv);
1791 break;
1792 case CXt_EVAL:
1793 gotoprobe = eval_root; /* XXX not good for nested eval */
1794 break;
1795 case CXt_LOOP:
1796 gotoprobe = cx->blk_oldcop->op_sibling;
1797 break;
1798 case CXt_SUBST:
1799 continue;
1800 case CXt_BLOCK:
1801 if (ix)
1802 gotoprobe = cx->blk_oldcop->op_sibling;
1803 else
1804 gotoprobe = main_root;
1805 break;
0a753a76
PP
1806 case CXt_NULL:
1807 DIE("Can't \"goto\" outside a block");
a0d0e21e
LW
1808 default:
1809 if (ix)
1810 DIE("panic: goto");
68dc0745 1811 gotoprobe = main_root;
a0d0e21e
LW
1812 break;
1813 }
1814 retop = dofindlabel(gotoprobe, label, enterops);
1815 if (retop)
1816 break;
1817 lastgotoprobe = gotoprobe;
1818 }
1819 if (!retop)
1820 DIE("Can't find label %s", label);
1821
1822 /* pop unwanted frames */
1823
1824 if (ix < cxstack_ix) {
1825 I32 oldsave;
1826
1827 if (ix < 0)
1828 ix = 0;
1829 dounwind(ix);
1830 TOPBLOCK(cx);
1831 oldsave = scopestack[scopestack_ix];
1832 LEAVE_SCOPE(oldsave);
1833 }
1834
1835 /* push wanted frames */
1836
748a9306 1837 if (*enterops && enterops[1]) {
a0d0e21e 1838 OP *oldop = op;
748a9306 1839 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e
LW
1840 op = enterops[ix];
1841 (*op->op_ppaddr)();
1842 }
1843 op = oldop;
1844 }
1845 }
1846
1847 if (do_dump) {
a5f75d66
AD
1848#ifdef VMS
1849 if (!retop) retop = main_start;
1850#endif
a0d0e21e
LW
1851 restartop = retop;
1852 do_undump = TRUE;
1853
1854 my_unexec();
1855
1856 restartop = 0; /* hmm, must be GNU unexec().. */
1857 do_undump = FALSE;
1858 }
1859
1ce6579f 1860 if (curstack == signalstack) {
748a9306 1861 restartop = retop;
54310121 1862 JMPENV_JUMP(3);
748a9306
LW
1863 }
1864
a0d0e21e
LW
1865 RETURNOP(retop);
1866}
1867
1868PP(pp_exit)
1869{
1870 dSP;
1871 I32 anum;
1872
1873 if (MAXARG < 1)
1874 anum = 0;
ff0cee69 1875 else {
a0d0e21e 1876 anum = SvIVx(POPs);
ff0cee69
PP
1877#ifdef VMSISH_EXIT
1878 if (anum == 1 && VMSISH_EXIT)
1879 anum = 0;
1880#endif
1881 }
a0d0e21e
LW
1882 my_exit(anum);
1883 PUSHs(&sv_undef);
1884 RETURN;
1885}
1886
1887#ifdef NOTYET
1888PP(pp_nswitch)
1889{
1890 dSP;
1891 double value = SvNVx(GvSV(cCOP->cop_gv));
1892 register I32 match = I_32(value);
1893
1894 if (value < 0.0) {
1895 if (((double)match) > value)
1896 --match; /* was fractional--truncate other way */
1897 }
1898 match -= cCOP->uop.scop.scop_offset;
1899 if (match < 0)
1900 match = 0;
1901 else if (match > cCOP->uop.scop.scop_max)
1902 match = cCOP->uop.scop.scop_max;
1903 op = cCOP->uop.scop.scop_next[match];
1904 RETURNOP(op);
1905}
1906
1907PP(pp_cswitch)
1908{
1909 dSP;
1910 register I32 match;
1911
1912 if (multiline)
1913 op = op->op_next; /* can't assume anything */
1914 else {
1915 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1916 match -= cCOP->uop.scop.scop_offset;
1917 if (match < 0)
1918 match = 0;
1919 else if (match > cCOP->uop.scop.scop_max)
1920 match = cCOP->uop.scop.scop_max;
1921 op = cCOP->uop.scop.scop_next[match];
1922 }
1923 RETURNOP(op);
1924}
1925#endif
1926
1927/* Eval. */
1928
1929static void
1930save_lines(array, sv)
1931AV *array;
1932SV *sv;
1933{
1934 register char *s = SvPVX(sv);
1935 register char *send = SvPVX(sv) + SvCUR(sv);
1936 register char *t;
1937 register I32 line = 1;
1938
1939 while (s && s < send) {
1940 SV *tmpstr = NEWSV(85,0);
1941
1942 sv_upgrade(tmpstr, SVt_PVMG);
1943 t = strchr(s, '\n');
1944 if (t)
1945 t++;
1946 else
1947 t = send;
1948
1949 sv_setpvn(tmpstr, s, t - s);
1950 av_store(array, line++, tmpstr);
1951 s = t;
1952 }
1953}
1954
1955static OP *
1e422769
PP
1956docatch(o)
1957OP *o;
1958{
1959 int ret;
035902c7 1960 I32 oldrunlevel = runlevel;
1e422769 1961 OP *oldop = op;
54310121 1962 dJMPENV;
1e422769
PP
1963
1964 op = o;
1e422769 1965#ifdef DEBUGGING
54310121 1966 assert(CATCH_GET == TRUE);
035902c7 1967 DEBUG_l(deb("(Setting up local jumplevel, runlevel = %ld)\n", (long)runlevel+1));
1e422769 1968#endif
22921e25
CS
1969 JMPENV_PUSH(ret);
1970 switch (ret) {
1e422769 1971 default: /* topmost level handles it */
54310121 1972 JMPENV_POP;
1e422769 1973 runlevel = oldrunlevel;
1e422769 1974 op = oldop;
54310121 1975 JMPENV_JUMP(ret);
1e422769
PP
1976 /* NOTREACHED */
1977 case 3:
1978 if (!restartop) {
1979 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1980 break;
1981 }
1e422769
PP
1982 op = restartop;
1983 restartop = 0;
1984 /* FALL THROUGH */
1985 case 0:
1986 runops();
1987 break;
1988 }
54310121 1989 JMPENV_POP;
1e422769 1990 runlevel = oldrunlevel;
1e422769
PP
1991 op = oldop;
1992 return Nullop;
1993}
1994
1995static OP *
a0d0e21e
LW
1996doeval(gimme)
1997int gimme;
1998{
1999 dSP;
2000 OP *saveop = op;
2001 HV *newstash;
ff3ff8d1 2002 CV *caller;
748a9306 2003 AV* comppadlist;
a0d0e21e
LW
2004
2005 in_eval = 1;
2006
1ce6579f
PP
2007 PUSHMARK(SP);
2008
a0d0e21e
LW
2009 /* set up a scratch pad */
2010
55497cff 2011 SAVEI32(padix);
a0d0e21e
LW
2012 SAVESPTR(curpad);
2013 SAVESPTR(comppad);
2014 SAVESPTR(comppad_name);
55497cff
PP
2015 SAVEI32(comppad_name_fill);
2016 SAVEI32(min_intro_pending);
2017 SAVEI32(max_intro_pending);
748a9306 2018
ff3ff8d1 2019 caller = compcv;
748a9306
LW
2020 SAVESPTR(compcv);
2021 compcv = (CV*)NEWSV(1104,0);
2022 sv_upgrade((SV *)compcv, SVt_PVCV);
07055b4c 2023 CvUNIQUE_on(compcv);
748a9306 2024
a0d0e21e
LW
2025 comppad = newAV();
2026 comppad_name = newAV();
2027 comppad_name_fill = 0;
2028 min_intro_pending = 0;
2029 av_push(comppad, Nullsv);
2030 curpad = AvARRAY(comppad);
2031 padix = 0;
2032
748a9306
LW
2033 comppadlist = newAV();
2034 AvREAL_off(comppadlist);
8e07c86e
AD
2035 av_store(comppadlist, 0, (SV*)comppad_name);
2036 av_store(comppadlist, 1, (SV*)comppad);
748a9306 2037 CvPADLIST(compcv) = comppadlist;
2c05e328
CS
2038
2039 if (saveop->op_type != OP_REQUIRE)
2040 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(caller);
07055b4c 2041
8e07c86e 2042 SAVEFREESV(compcv);
748a9306 2043
a0d0e21e
LW
2044 /* make sure we compile in the right package */
2045
2046 newstash = curcop->cop_stash;
2047 if (curstash != newstash) {
2048 SAVESPTR(curstash);
2049 curstash = newstash;
2050 }
2051 SAVESPTR(beginav);
2052 beginav = newAV();
2053 SAVEFREESV(beginav);
2054
2055 /* try to compile it */
2056
2057 eval_root = Nullop;
2058 error_count = 0;
2059 curcop = &compiling;
2060 curcop->cop_arybase = 0;
c07a80fd
PP
2061 SvREFCNT_dec(rs);
2062 rs = newSVpv("\n", 1);
1ce6579f
PP
2063 if (saveop->op_flags & OPf_SPECIAL)
2064 in_eval |= 4;
2065 else
2066 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2067 if (yyparse() || error_count || !eval_root) {
2068 SV **newsp;
2069 I32 gimme;
2070 CONTEXT *cx;
2071 I32 optype;
2072
2073 op = saveop;
2074 if (eval_root) {
2075 op_free(eval_root);
2076 eval_root = Nullop;
2077 }
1ce6579f 2078 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e
LW
2079 POPBLOCK(cx,curpm);
2080 POPEVAL(cx);
2081 pop_return();
2082 lex_end();
2083 LEAVE;
2084 if (optype == OP_REQUIRE)
4633a7c4 2085 DIE("%s", SvPVx(GvSV(errgv), na));
c07a80fd
PP
2086 SvREFCNT_dec(rs);
2087 rs = SvREFCNT_inc(nrs);
a0d0e21e
LW
2088 RETPUSHUNDEF;
2089 }
c07a80fd
PP
2090 SvREFCNT_dec(rs);
2091 rs = SvREFCNT_inc(nrs);
a0d0e21e 2092 compiling.cop_line = 0;
a0d0e21e 2093 SAVEFREEOP(eval_root);
54310121
PP
2094 if (gimme & G_VOID)
2095 scalarvoid(eval_root);
2096 else if (gimme & G_ARRAY)
a0d0e21e
LW
2097 list(eval_root);
2098 else
2099 scalar(eval_root);
2100
2101 DEBUG_x(dump_eval());
2102
55497cff 2103 /* Register with debugger: */
55497cff
PP
2104 if (perldb && saveop->op_type == OP_REQUIRE) {
2105 CV *cv = perl_get_cv("DB::postponed", FALSE);
55497cff
PP
2106 if (cv) {
2107 dSP;
2108 PUSHMARK(sp);
2109 XPUSHs((SV*)compiling.cop_filegv);
2110 PUTBACK;
2111 perl_call_sv((SV*)cv, G_DISCARD);
2112 }
2113 }
2114
a0d0e21e
LW
2115 /* compiled okay, so do it */
2116
4fdae800
PP
2117 CvDEPTH(compcv) = 1;
2118
1ce6579f 2119 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e
LW
2120 RETURNOP(eval_start);
2121}
2122
2123PP(pp_require)
2124{
2125 dSP;
2126 register CONTEXT *cx;
2127 SV *sv;
2128 char *name;
2129 char *tmpname;
2130 SV** svp;
2131 I32 gimme = G_SCALAR;
760ac839 2132 PerlIO *tryrsfp = 0;
a0d0e21e
LW
2133
2134 sv = POPs;
4633a7c4 2135 if (SvNIOKp(sv) && !SvPOKp(sv)) {
36477c24 2136 SET_NUMERIC_STANDARD();
a5f75d66
AD
2137 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2138 DIE("Perl %s required--this is only version %s, stopped",
2139 SvPV(sv,na),patchlevel);
a0d0e21e
LW
2140 RETPUSHYES;
2141 }
2142 name = SvPV(sv, na);
2143 if (!*name)
2144 DIE("Null filename used");
4633a7c4 2145 TAINT_PROPER("require");
a0d0e21e
LW
2146 if (op->op_type == OP_REQUIRE &&
2147 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2148 *svp != &sv_undef)
2149 RETPUSHYES;
2150
2151 /* prepare to compile file */
2152
2153 tmpname = savepv(name);
2154 if (*tmpname == '/' ||
2155 (*tmpname == '.' &&
2156 (tmpname[1] == '/' ||
748a9306 2157 (tmpname[1] == '.' && tmpname[2] == '/')))
4633a7c4
LW
2158#ifdef DOSISH
2159 || (tmpname[0] && tmpname[1] == ':')
2160#endif
748a9306 2161#ifdef VMS
bbce6d69
PP
2162 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2163 (isALNUM(tmpname[1]) || strchr("$-_]>",tmpname[1]))))
748a9306
LW
2164#endif
2165 )
a0d0e21e 2166 {
760ac839 2167 tryrsfp = PerlIO_open(tmpname,"r");
a0d0e21e
LW
2168 }
2169 else {
2170 AV *ar = GvAVn(incgv);
2171 I32 i;
748a9306 2172#ifdef VMS
bbce6d69
PP
2173 char unixified[256];
2174 if (tounixspec_ts(tmpname,unixified) != NULL)
2175 for (i = 0; i <= AvFILL(ar); i++) {
748a9306 2176 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
4633a7c4 2177 continue;
bbce6d69 2178 strcat(buf,unixified);
748a9306 2179#else
bbce6d69 2180 for (i = 0; i <= AvFILL(ar); i++) {
a0d0e21e
LW
2181 (void)sprintf(buf, "%s/%s",
2182 SvPVx(*av_fetch(ar, i, TRUE), na), name);
748a9306 2183#endif
760ac839 2184 tryrsfp = PerlIO_open(buf, "r");
a0d0e21e
LW
2185 if (tryrsfp) {
2186 char *s = buf;
2187
2188 if (*s == '.' && s[1] == '/')
2189 s += 2;
2190 Safefree(tmpname);
2191 tmpname = savepv(s);
2192 break;
2193 }
2194 }
2195 }
2196 SAVESPTR(compiling.cop_filegv);
2197 compiling.cop_filegv = gv_fetchfile(tmpname);
2198 Safefree(tmpname);
2199 tmpname = Nullch;
2200 if (!tryrsfp) {
2201 if (op->op_type == OP_REQUIRE) {
2202 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2203 if (instr(tokenbuf,".h "))
2204 strcat(tokenbuf," (change .h to .ph maybe?)");
2205 if (instr(tokenbuf,".ph "))
2206 strcat(tokenbuf," (did you run h2ph?)");
2207 DIE("%s",tokenbuf);
2208 }
2209
2210 RETPUSHUNDEF;
2211 }
2212
2213 /* Assume success here to prevent recursive requirement. */
2214 (void)hv_store(GvHVn(incgv), name, strlen(name),
2215 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2216
2217 ENTER;
2218 SAVETMPS;
2219 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73
AD
2220 if (rsfp_filters){
2221 save_aptr(&rsfp_filters);
2222 rsfp_filters = NULL;
2223 }
2224
a0d0e21e
LW
2225 rsfp = tryrsfp;
2226 name = savepv(name);
2227 SAVEFREEPV(name);
2228 SAVEI32(hints);
2229 hints = 0;
2230
2231 /* switch to eval mode */
2232
2233 push_return(op->op_next);
2234 PUSHBLOCK(cx, CXt_EVAL, SP);
2235 PUSHEVAL(cx, name, compiling.cop_filegv);
2236
2237 compiling.cop_line = 0;
2238
2239 PUTBACK;
1e422769 2240 return DOCATCH(doeval(G_SCALAR));
a0d0e21e
LW
2241}
2242
2243PP(pp_dofile)
2244{
2245 return pp_require(ARGS);
2246}
2247
2248PP(pp_entereval)
2249{
2250 dSP;
2251 register CONTEXT *cx;
2252 dPOPss;
54310121 2253 I32 gimme = GIMME_V, was = sub_generation;
55497cff 2254 char tmpbuf[32], *safestr;
a0d0e21e 2255 STRLEN len;
55497cff 2256 OP *ret;
a0d0e21e
LW
2257
2258 if (!SvPV(sv,len) || !len)
2259 RETPUSHUNDEF;
748a9306 2260 TAINT_PROPER("eval");
a0d0e21e
LW
2261
2262 ENTER;
a0d0e21e 2263 lex_start(sv);
748a9306 2264 SAVETMPS;
a0d0e21e
LW
2265
2266 /* switch to eval mode */
2267
748a9306 2268 SAVESPTR(compiling.cop_filegv);
ff0cee69 2269 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++evalseq);
a0d0e21e
LW
2270 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2271 compiling.cop_line = 1;
55497cff
PP
2272 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2273 deleting the eval's FILEGV from the stash before gv_check() runs
2274 (i.e. before run-time proper). To work around the coredump that
2275 ensues, we always turn GvMULTI_on for any globals that were
2276 introduced within evals. See force_ident(). GSAR 96-10-12 */
2277 safestr = savepv(tmpbuf);
2278 SAVEDELETE(defstash, safestr, strlen(safestr));
a0d0e21e
LW
2279 SAVEI32(hints);
2280 hints = op->op_targ;
2281
2282 push_return(op->op_next);
2283 PUSHBLOCK(cx, CXt_EVAL, SP);
2284 PUSHEVAL(cx, 0, compiling.cop_filegv);
2285
2286 /* prepare to compile string */
2287
2288 if (perldb && curstash != debstash)
2289 save_lines(GvAV(compiling.cop_filegv), linestr);
2290 PUTBACK;
55497cff
PP
2291 ret = doeval(gimme);
2292 if (perldb && was != sub_generation) { /* Some subs defined here. */
2293 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
2294 }
1e422769 2295 return DOCATCH(ret);
a0d0e21e
LW
2296}
2297
2298PP(pp_leaveeval)
2299{
2300 dSP;
2301 register SV **mark;
2302 SV **newsp;
2303 PMOP *newpm;
2304 I32 gimme;
2305 register CONTEXT *cx;
2306 OP *retop;
760ac839 2307 U8 save_flags = op -> op_flags;
a0d0e21e
LW
2308 I32 optype;
2309
2310 POPBLOCK(cx,newpm);
2311 POPEVAL(cx);
2312 retop = pop_return();
2313
54310121
PP
2314 if (gimme == G_VOID)
2315 MARK = newsp;
2316 else if (gimme == G_SCALAR) {
2317 MARK = newsp + 1;
2318 if (MARK <= SP) {
2319 if (SvFLAGS(TOPs) & SVs_TEMP)
2320 *MARK = TOPs;
2321 else
2322 *MARK = sv_mortalcopy(TOPs);
2323 }
a0d0e21e 2324 else {
54310121
PP
2325 MEXTEND(mark,0);
2326 *MARK = &sv_undef;
a0d0e21e 2327 }
a0d0e21e
LW
2328 }
2329 else {
2330 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2331 if (!(SvFLAGS(*mark) & SVs_TEMP))
a0d0e21e
LW
2332 *mark = sv_mortalcopy(*mark);
2333 /* in case LEAVE wipes old return values */
2334 }
2335 curpm = newpm; /* Don't pop $1 et al till now */
2336
4fdae800
PP
2337#ifdef DEBUGGING
2338 assert(CvDEPTH(compcv) == 1);
2339#endif
2340 CvDEPTH(compcv) = 0;
2341
1ce6579f 2342 if (optype == OP_REQUIRE &&
54310121
PP
2343 !(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp))
2344 {
1ce6579f 2345 /* Unassume the success we assumed earlier. */
54310121 2346 char *name = cx->blk_eval.old_name;
1ce6579f
PP
2347 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
2348 retop = die("%s did not return a true value", name);
a0d0e21e
LW
2349 }
2350
2351 lex_end();
2352 LEAVE;
4fdae800 2353
760ac839 2354 if (!(save_flags & OPf_SPECIAL))
1ce6579f 2355 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2356
2357 RETURNOP(retop);
2358}
2359
a0d0e21e
LW
2360PP(pp_entertry)
2361{
2362 dSP;
2363 register CONTEXT *cx;
54310121 2364 I32 gimme = GIMME_V;
a0d0e21e
LW
2365
2366 ENTER;
2367 SAVETMPS;
2368
2369 push_return(cLOGOP->op_other->op_next);
2370 PUSHBLOCK(cx, CXt_EVAL, SP);
2371 PUSHEVAL(cx, 0, 0);
2372 eval_root = op; /* Only needed so that goto works right. */
2373
2374 in_eval = 1;
4633a7c4 2375 sv_setpv(GvSV(errgv),"");
1e422769
PP
2376 PUTBACK;
2377 return DOCATCH(op->op_next);
a0d0e21e
LW
2378}
2379
2380PP(pp_leavetry)
2381{
2382 dSP;
2383 register SV **mark;
2384 SV **newsp;
2385 PMOP *newpm;
2386 I32 gimme;
2387 register CONTEXT *cx;
2388 I32 optype;
2389
2390 POPBLOCK(cx,newpm);
2391 POPEVAL(cx);
2392 pop_return();
2393
54310121
PP
2394 if (gimme == G_VOID)
2395 SP = newsp;
2396 else if (gimme == G_SCALAR) {
2397 MARK = newsp + 1;
2398 if (MARK <= SP) {
2399 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2400 *MARK = TOPs;
2401 else
2402 *MARK = sv_mortalcopy(TOPs);
2403 }
a0d0e21e 2404 else {
54310121
PP
2405 MEXTEND(mark,0);
2406 *MARK = &sv_undef;
a0d0e21e
LW
2407 }
2408 SP = MARK;
2409 }
2410 else {
2411 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2412 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
a0d0e21e
LW
2413 *mark = sv_mortalcopy(*mark);
2414 /* in case LEAVE wipes old return values */
2415 }
2416 curpm = newpm; /* Don't pop $1 et al till now */
2417
2418 LEAVE;
4633a7c4 2419 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2420 RETURN;
2421}
2422
2423static void
2424doparseform(sv)
2425SV *sv;
2426{
2427 STRLEN len;
2428 register char *s = SvPV_force(sv, len);
2429 register char *send = s + len;
2430 register char *base;
2431 register I32 skipspaces = 0;
2432 bool noblank;
2433 bool repeat;
2434 bool postspace = FALSE;
2435 U16 *fops;
2436 register U16 *fpc;
2437 U16 *linepc;
2438 register I32 arg;
2439 bool ischop;
2440
55497cff 2441 if (len == 0)
bbce6d69 2442 croak("Null picture in formline");
55497cff
PP
2443
2444 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
a0d0e21e
LW
2445 fpc = fops;
2446
2447 if (s < send) {
2448 linepc = fpc;
2449 *fpc++ = FF_LINEMARK;
2450 noblank = repeat = FALSE;
2451 base = s;
2452 }
2453
2454 while (s <= send) {
2455 switch (*s++) {
2456 default:
2457 skipspaces = 0;
2458 continue;
2459
2460 case '~':
2461 if (*s == '~') {
2462 repeat = TRUE;
2463 *s = ' ';
2464 }
2465 noblank = TRUE;
2466 s[-1] = ' ';
2467 /* FALL THROUGH */
2468 case ' ': case '\t':
2469 skipspaces++;
2470 continue;
2471
2472 case '\n': case 0:
2473 arg = s - base;
2474 skipspaces++;
2475 arg -= skipspaces;
2476 if (arg) {
5f05dabc 2477 if (postspace)
a0d0e21e 2478 *fpc++ = FF_SPACE;
a0d0e21e
LW
2479 *fpc++ = FF_LITERAL;
2480 *fpc++ = arg;
2481 }
5f05dabc 2482 postspace = FALSE;
a0d0e21e
LW
2483 if (s <= send)
2484 skipspaces--;
2485 if (skipspaces) {
2486 *fpc++ = FF_SKIP;
2487 *fpc++ = skipspaces;
2488 }
2489 skipspaces = 0;
2490 if (s <= send)
2491 *fpc++ = FF_NEWLINE;
2492 if (noblank) {
2493 *fpc++ = FF_BLANK;
2494 if (repeat)
2495 arg = fpc - linepc + 1;
2496 else
2497 arg = 0;
2498 *fpc++ = arg;
2499 }
2500 if (s < send) {
2501 linepc = fpc;
2502 *fpc++ = FF_LINEMARK;
2503 noblank = repeat = FALSE;
2504 base = s;
2505 }
2506 else
2507 s++;
2508 continue;
2509
2510 case '@':
2511 case '^':
2512 ischop = s[-1] == '^';
2513
2514 if (postspace) {
2515 *fpc++ = FF_SPACE;
2516 postspace = FALSE;
2517 }
2518 arg = (s - base) - 1;
2519 if (arg) {
2520 *fpc++ = FF_LITERAL;
2521 *fpc++ = arg;
2522 }
2523
2524 base = s - 1;
2525 *fpc++ = FF_FETCH;
2526 if (*s == '*') {
2527 s++;
2528 *fpc++ = 0;
2529 *fpc++ = FF_LINEGLOB;
2530 }
2531 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2532 arg = ischop ? 512 : 0;
2533 base = s - 1;
2534 while (*s == '#')
2535 s++;
2536 if (*s == '.') {
2537 char *f;
2538 s++;
2539 f = s;
2540 while (*s == '#')
2541 s++;
2542 arg |= 256 + (s - f);
2543 }
2544 *fpc++ = s - base; /* fieldsize for FETCH */
2545 *fpc++ = FF_DECIMAL;
2546 *fpc++ = arg;
2547 }
2548 else {
2549 I32 prespace = 0;
2550 bool ismore = FALSE;
2551
2552 if (*s == '>') {
2553 while (*++s == '>') ;
2554 prespace = FF_SPACE;
2555 }
2556 else if (*s == '|') {
2557 while (*++s == '|') ;
2558 prespace = FF_HALFSPACE;
2559 postspace = TRUE;
2560 }
2561 else {
2562 if (*s == '<')
2563 while (*++s == '<') ;
2564 postspace = TRUE;
2565 }
2566 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2567 s += 3;
2568 ismore = TRUE;
2569 }
2570 *fpc++ = s - base; /* fieldsize for FETCH */
2571
2572 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2573
2574 if (prespace)
2575 *fpc++ = prespace;
2576 *fpc++ = FF_ITEM;
2577 if (ismore)
2578 *fpc++ = FF_MORE;
2579 if (ischop)
2580 *fpc++ = FF_CHOP;
2581 }
2582 base = s;
2583 skipspaces = 0;
2584 continue;
2585 }
2586 }
2587 *fpc++ = FF_END;
2588
2589 arg = fpc - fops;
2590 { /* need to jump to the next word */
2591 int z;
2592 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2593 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2594 s = SvPVX(sv) + SvCUR(sv) + z;
2595 }
2596 Copy(fops, s, arg, U16);
2597 Safefree(fops);
55497cff 2598 sv_magic(sv, Nullsv, 'f', Nullch, 0);
a0d0e21e
LW
2599 SvCOMPILED_on(sv);
2600}