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Branch 5.003 -> thrperl
[perl5.git] / pp_ctl.c
CommitLineData
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1/* pp_ctl.c
2 *
3 * Copyright (c) 1991-1994, Larry Wall
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
26static OP *doeval _((int gimme));
27static OP *dofindlabel _((OP *op, char *label, OP **opstack));
28static void doparseform _((SV *sv));
29static I32 dopoptoeval _((I32 startingblock));
30static I32 dopoptolabel _((char *label));
31static I32 dopoptoloop _((I32 startingblock));
32static I32 dopoptosub _((I32 startingblock));
33static void save_lines _((AV *array, SV *sv));
34static int sortcmp _((const void *, const void *));
35static int sortcv _((const void *, const void *));
36
37static I32 sortcxix;
38
39PP(pp_wantarray)
40{
41 dSP;
42 I32 cxix;
43 EXTEND(SP, 1);
44
45 cxix = dopoptosub(cxstack_ix);
46 if (cxix < 0)
47 RETPUSHUNDEF;
48
49 if (cxstack[cxix].blk_gimme == G_ARRAY)
50 RETPUSHYES;
51 else
52 RETPUSHNO;
53}
54
55PP(pp_regcmaybe)
56{
57 return NORMAL;
58}
59
60PP(pp_regcomp) {
61 dSP;
62 register PMOP *pm = (PMOP*)cLOGOP->op_other;
63 register char *t;
64 SV *tmpstr;
65 STRLEN len;
66
67 tmpstr = POPs;
68 t = SvPV(tmpstr, len);
69
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70 /* JMR: Check against the last compiled regexp */
71 if ( ! pm->op_pmregexp || ! pm->op_pmregexp->precomp
72 || strnNE(pm->op_pmregexp->precomp, t, len)
73 || pm->op_pmregexp->precomp[len]) {
74 if (pm->op_pmregexp) {
75 pregfree(pm->op_pmregexp);
76 pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
77 }
a0d0e21e 78
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79 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
80 pm->op_pmregexp = pregcomp(t, t + len, pm);
81 }
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82
83 if (!pm->op_pmregexp->prelen && curpm)
84 pm = curpm;
85 else if (strEQ("\\s+", pm->op_pmregexp->precomp))
86 pm->op_pmflags |= PMf_WHITE;
87
88 if (pm->op_pmflags & PMf_KEEP) {
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89 pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
90 hoistmust(pm);
91 cLOGOP->op_first->op_next = op->op_next;
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92 }
93 RETURN;
94}
95
96PP(pp_substcont)
97{
98 dSP;
99 register PMOP *pm = (PMOP*) cLOGOP->op_other;
100 register CONTEXT *cx = &cxstack[cxstack_ix];
101 register SV *dstr = cx->sb_dstr;
102 register char *s = cx->sb_s;
103 register char *m = cx->sb_m;
104 char *orig = cx->sb_orig;
c07a80fd 105 register REGEXP *rx = cx->sb_rx;
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106
107 if (cx->sb_iters++) {
108 if (cx->sb_iters > cx->sb_maxiters)
109 DIE("Substitution loop");
110
111 sv_catsv(dstr, POPs);
112 if (rx->subbase)
113 Safefree(rx->subbase);
114 rx->subbase = cx->sb_subbase;
115
116 /* Are we done */
e50aee73 117 if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
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118 s == m, Nullsv, cx->sb_safebase))
119 {
120 SV *targ = cx->sb_targ;
121 sv_catpvn(dstr, s, cx->sb_strend - s);
748a9306 122
4633a7c4 123 (void)SvOOK_off(targ);
cb0b1708 124 Safefree(SvPVX(targ));
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125 SvPVX(targ) = SvPVX(dstr);
126 SvCUR_set(targ, SvCUR(dstr));
127 SvLEN_set(targ, SvLEN(dstr));
128 SvPVX(dstr) = 0;
129 sv_free(dstr);
130
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131 (void)SvPOK_only(targ);
132 SvSETMAGIC(targ);
133 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
4633a7c4 134 LEAVE_SCOPE(cx->sb_oldsave);
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135 POPSUBST(cx);
136 RETURNOP(pm->op_next);
137 }
138 }
139 if (rx->subbase && rx->subbase != orig) {
140 m = s;
141 s = orig;
142 cx->sb_orig = orig = rx->subbase;
143 s = orig + (m - s);
144 cx->sb_strend = s + (cx->sb_strend - m);
145 }
146 cx->sb_m = m = rx->startp[0];
147 sv_catpvn(dstr, s, m-s);
148 cx->sb_s = rx->endp[0];
149 cx->sb_subbase = rx->subbase;
150
151 rx->subbase = Nullch; /* so recursion works */
152 RETURNOP(pm->op_pmreplstart);
153}
154
155PP(pp_formline)
156{
157 dSP; dMARK; dORIGMARK;
158 register SV *form = *++MARK;
159 register U16 *fpc;
160 register char *t;
161 register char *f;
162 register char *s;
163 register char *send;
164 register I32 arg;
165 register SV *sv;
166 char *item;
167 I32 itemsize;
168 I32 fieldsize;
169 I32 lines = 0;
170 bool chopspace = (strchr(chopset, ' ') != Nullch);
171 char *chophere;
172 char *linemark;
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173 double value;
174 bool gotsome;
175 STRLEN len;
176
177 if (!SvCOMPILED(form)) {
178 SvREADONLY_off(form);
179 doparseform(form);
180 }
181
182 SvPV_force(formtarget, len);
183 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
184 t += len;
185 f = SvPV(form, len);
186 /* need to jump to the next word */
187 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
188
189 fpc = (U16*)s;
190
191 for (;;) {
192 DEBUG_f( {
193 char *name = "???";
194 arg = -1;
195 switch (*fpc) {
196 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
197 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
198 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
199 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
200 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
201
202 case FF_CHECKNL: name = "CHECKNL"; break;
203 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
204 case FF_SPACE: name = "SPACE"; break;
205 case FF_HALFSPACE: name = "HALFSPACE"; break;
206 case FF_ITEM: name = "ITEM"; break;
207 case FF_CHOP: name = "CHOP"; break;
208 case FF_LINEGLOB: name = "LINEGLOB"; break;
209 case FF_NEWLINE: name = "NEWLINE"; break;
210 case FF_MORE: name = "MORE"; break;
211 case FF_LINEMARK: name = "LINEMARK"; break;
212 case FF_END: name = "END"; break;
213 }
214 if (arg >= 0)
215 fprintf(stderr, "%-16s%ld\n", name, (long) arg);
216 else
217 fprintf(stderr, "%-16s\n", name);
218 } )
219 switch (*fpc++) {
220 case FF_LINEMARK:
221 linemark = t;
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222 lines++;
223 gotsome = FALSE;
224 break;
225
226 case FF_LITERAL:
227 arg = *fpc++;
228 while (arg--)
229 *t++ = *f++;
230 break;
231
232 case FF_SKIP:
233 f += *fpc++;
234 break;
235
236 case FF_FETCH:
237 arg = *fpc++;
238 f += arg;
239 fieldsize = arg;
240
241 if (MARK < SP)
242 sv = *++MARK;
243 else {
244 sv = &sv_no;
245 if (dowarn)
246 warn("Not enough format arguments");
247 }
248 break;
249
250 case FF_CHECKNL:
251 item = s = SvPV(sv, len);
252 itemsize = len;
253 if (itemsize > fieldsize)
254 itemsize = fieldsize;
255 send = chophere = s + itemsize;
256 while (s < send) {
257 if (*s & ~31)
258 gotsome = TRUE;
259 else if (*s == '\n')
260 break;
261 s++;
262 }
263 itemsize = s - item;
264 break;
265
266 case FF_CHECKCHOP:
267 item = s = SvPV(sv, len);
268 itemsize = len;
269 if (itemsize <= fieldsize) {
270 send = chophere = s + itemsize;
271 while (s < send) {
272 if (*s == '\r') {
273 itemsize = s - item;
274 break;
275 }
276 if (*s++ & ~31)
277 gotsome = TRUE;
278 }
279 }
280 else {
281 itemsize = fieldsize;
282 send = chophere = s + itemsize;
283 while (s < send || (s == send && isSPACE(*s))) {
284 if (isSPACE(*s)) {
285 if (chopspace)
286 chophere = s;
287 if (*s == '\r')
288 break;
289 }
290 else {
291 if (*s & ~31)
292 gotsome = TRUE;
293 if (strchr(chopset, *s))
294 chophere = s + 1;
295 }
296 s++;
297 }
298 itemsize = chophere - item;
299 }
300 break;
301
302 case FF_SPACE:
303 arg = fieldsize - itemsize;
304 if (arg) {
305 fieldsize -= arg;
306 while (arg-- > 0)
307 *t++ = ' ';
308 }
309 break;
310
311 case FF_HALFSPACE:
312 arg = fieldsize - itemsize;
313 if (arg) {
314 arg /= 2;
315 fieldsize -= arg;
316 while (arg-- > 0)
317 *t++ = ' ';
318 }
319 break;
320
321 case FF_ITEM:
322 arg = itemsize;
323 s = item;
324 while (arg--) {
325#if 'z' - 'a' != 25
326 int ch = *t++ = *s++;
327 if (!iscntrl(ch))
328 t[-1] = ' ';
329#else
330 if ( !((*t++ = *s++) & ~31) )
331 t[-1] = ' ';
332#endif
333
334 }
335 break;
336
337 case FF_CHOP:
338 s = chophere;
339 if (chopspace) {
340 while (*s && isSPACE(*s))
341 s++;
342 }
343 sv_chop(sv,s);
344 break;
345
346 case FF_LINEGLOB:
347 item = s = SvPV(sv, len);
348 itemsize = len;
349 if (itemsize) {
350 gotsome = TRUE;
351 send = s + itemsize;
352 while (s < send) {
353 if (*s++ == '\n') {
354 if (s == send)
355 itemsize--;
356 else
357 lines++;
358 }
359 }
360 SvCUR_set(formtarget, t - SvPVX(formtarget));
361 sv_catpvn(formtarget, item, itemsize);
362 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
363 t = SvPVX(formtarget) + SvCUR(formtarget);
364 }
365 break;
366
367 case FF_DECIMAL:
368 /* If the field is marked with ^ and the value is undefined,
369 blank it out. */
370 arg = *fpc++;
371 if ((arg & 512) && !SvOK(sv)) {
372 arg = fieldsize;
373 while (arg--)
374 *t++ = ' ';
375 break;
376 }
377 gotsome = TRUE;
378 value = SvNV(sv);
379 if (arg & 256) {
380 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
381 } else {
382 sprintf(t, "%*.0f", (int) fieldsize, value);
383 }
384 t += fieldsize;
385 break;
386
387 case FF_NEWLINE:
388 f++;
389 while (t-- > linemark && *t == ' ') ;
390 t++;
391 *t++ = '\n';
392 break;
393
394 case FF_BLANK:
395 arg = *fpc++;
396 if (gotsome) {
397 if (arg) { /* repeat until fields exhausted? */
398 *t = '\0';
399 SvCUR_set(formtarget, t - SvPVX(formtarget));
400 lines += FmLINES(formtarget);
401 if (lines == 200) {
402 arg = t - linemark;
403 if (strnEQ(linemark, linemark - arg, arg))
404 DIE("Runaway format");
405 }
406 FmLINES(formtarget) = lines;
407 SP = ORIGMARK;
408 RETURNOP(cLISTOP->op_first);
409 }
410 }
411 else {
412 t = linemark;
413 lines--;
414 }
415 break;
416
417 case FF_MORE:
418 if (itemsize) {
419 arg = fieldsize - itemsize;
420 if (arg) {
421 fieldsize -= arg;
422 while (arg-- > 0)
423 *t++ = ' ';
424 }
425 s = t - 3;
426 if (strnEQ(s," ",3)) {
427 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
428 s--;
429 }
430 *s++ = '.';
431 *s++ = '.';
432 *s++ = '.';
433 }
434 break;
435
436 case FF_END:
437 *t = '\0';
438 SvCUR_set(formtarget, t - SvPVX(formtarget));
439 FmLINES(formtarget) += lines;
440 SP = ORIGMARK;
441 RETPUSHYES;
442 }
443 }
444}
445
446PP(pp_grepstart)
447{
448 dSP;
449 SV *src;
450
451 if (stack_base + *markstack_ptr == sp) {
452 (void)POPMARK;
453 if (GIMME != G_ARRAY)
454 XPUSHs(&sv_no);
455 RETURNOP(op->op_next->op_next);
456 }
457 stack_sp = stack_base + *markstack_ptr + 1;
458 pp_pushmark(); /* push dst */
459 pp_pushmark(); /* push src */
460 ENTER; /* enter outer scope */
461
462 SAVETMPS;
463 SAVESPTR(GvSV(defgv));
464
465 ENTER; /* enter inner scope */
466 SAVESPTR(curpm);
467
468 src = stack_base[*markstack_ptr];
469 SvTEMP_off(src);
470 GvSV(defgv) = src;
471
472 PUTBACK;
473 if (op->op_type == OP_MAPSTART)
474 pp_pushmark(); /* push top */
475 return ((LOGOP*)op->op_next)->op_other;
476}
477
478PP(pp_mapstart)
479{
480 DIE("panic: mapstart"); /* uses grepstart */
481}
482
483PP(pp_mapwhile)
484{
485 dSP;
486 I32 diff = (sp - stack_base) - *markstack_ptr;
487 I32 count;
488 I32 shift;
489 SV** src;
490 SV** dst;
491
492 ++markstack_ptr[-1];
493 if (diff) {
494 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
495 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
496 count = (sp - stack_base) - markstack_ptr[-1] + 2;
497
498 EXTEND(sp,shift);
499 src = sp;
500 dst = (sp += shift);
501 markstack_ptr[-1] += shift;
502 *markstack_ptr += shift;
503 while (--count)
504 *dst-- = *src--;
505 }
506 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
507 ++diff;
508 while (--diff)
509 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
510 }
511 LEAVE; /* exit inner scope */
512
513 /* All done yet? */
514 if (markstack_ptr[-1] > *markstack_ptr) {
515 I32 items;
516
517 (void)POPMARK; /* pop top */
518 LEAVE; /* exit outer scope */
519 (void)POPMARK; /* pop src */
520 items = --*markstack_ptr - markstack_ptr[-1];
521 (void)POPMARK; /* pop dst */
522 SP = stack_base + POPMARK; /* pop original mark */
523 if (GIMME != G_ARRAY) {
524 dTARGET;
525 XPUSHi(items);
526 RETURN;
527 }
528 SP += items;
529 RETURN;
530 }
531 else {
532 SV *src;
533
534 ENTER; /* enter inner scope */
535 SAVESPTR(curpm);
536
537 src = stack_base[markstack_ptr[-1]];
538 SvTEMP_off(src);
539 GvSV(defgv) = src;
540
541 RETURNOP(cLOGOP->op_other);
542 }
543}
544
545
546PP(pp_sort)
547{
548 dSP; dMARK; dORIGMARK;
549 register SV **up;
550 SV **myorigmark = ORIGMARK;
551 register I32 max;
552 HV *stash;
553 GV *gv;
554 CV *cv;
555 I32 gimme = GIMME;
556 OP* nextop = op->op_next;
557
558 if (gimme != G_ARRAY) {
559 SP = MARK;
560 RETPUSHUNDEF;
561 }
562
563 if (op->op_flags & OPf_STACKED) {
564 ENTER;
565 if (op->op_flags & OPf_SPECIAL) {
566 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
567 kid = kUNOP->op_first; /* pass rv2gv */
568 kid = kUNOP->op_first; /* pass leave */
569 sortcop = kid->op_next;
570 stash = curcop->cop_stash;
571 }
572 else {
573 cv = sv_2cv(*++MARK, &stash, &gv, 0);
574 if (!(cv && CvROOT(cv))) {
575 if (gv) {
576 SV *tmpstr = sv_newmortal();
577 gv_efullname(tmpstr, gv);
578 if (cv && CvXSUB(cv))
579 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
580 DIE("Undefined sort subroutine \"%s\" called",
581 SvPVX(tmpstr));
582 }
583 if (cv) {
584 if (CvXSUB(cv))
585 DIE("Xsub called in sort");
586 DIE("Undefined subroutine in sort");
587 }
588 DIE("Not a CODE reference in sort");
589 }
590 sortcop = CvSTART(cv);
591 SAVESPTR(CvROOT(cv)->op_ppaddr);
592 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
593
594 SAVESPTR(curpad);
595 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
596 }
597 }
598 else {
599 sortcop = Nullop;
600 stash = curcop->cop_stash;
601 }
602
603 up = myorigmark + 1;
604 while (MARK < SP) { /* This may or may not shift down one here. */
605 /*SUPPRESS 560*/
606 if (*up = *++MARK) { /* Weed out nulls. */
607 if (!SvPOK(*up))
608 (void)sv_2pv(*up, &na);
609 else
610 SvTEMP_off(*up);
611 up++;
612 }
613 }
614 max = --up - myorigmark;
615 if (sortcop) {
616 if (max > 1) {
617 AV *oldstack;
618 CONTEXT *cx;
619 SV** newsp;
620
621 SAVETMPS;
622 SAVESPTR(op);
623
624 oldstack = stack;
625 if (!sortstack) {
626 sortstack = newAV();
627 AvREAL_off(sortstack);
628 av_extend(sortstack, 32);
629 }
630 SWITCHSTACK(stack, sortstack);
631 if (sortstash != stash) {
632 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
633 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
634 sortstash = stash;
635 }
636
637 SAVESPTR(GvSV(firstgv));
638 SAVESPTR(GvSV(secondgv));
639 PUSHBLOCK(cx, CXt_LOOP, stack_base);
640 sortcxix = cxstack_ix;
641
642 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
643
644 POPBLOCK(cx,curpm);
645 SWITCHSTACK(sortstack, oldstack);
646 }
647 LEAVE;
648 }
649 else {
650 if (max > 1) {
651 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
652 qsort((char*)(ORIGMARK+1), max, sizeof(SV*), sortcmp);
653 }
654 }
655 stack_sp = ORIGMARK + max;
656 return nextop;
657}
658
659/* Range stuff. */
660
661PP(pp_range)
662{
663 if (GIMME == G_ARRAY)
664 return cCONDOP->op_true;
665 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
666}
667
668PP(pp_flip)
669{
670 dSP;
671
672 if (GIMME == G_ARRAY) {
673 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
674 }
675 else {
676 dTOPss;
677 SV *targ = PAD_SV(op->op_targ);
678
679 if ((op->op_private & OPpFLIP_LINENUM)
680 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
681 : SvTRUE(sv) ) {
682 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
683 if (op->op_flags & OPf_SPECIAL) {
684 sv_setiv(targ, 1);
685 RETURN;
686 }
687 else {
688 sv_setiv(targ, 0);
689 sp--;
690 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
691 }
692 }
693 sv_setpv(TARG, "");
694 SETs(targ);
695 RETURN;
696 }
697}
698
699PP(pp_flop)
700{
701 dSP;
702
703 if (GIMME == G_ARRAY) {
704 dPOPPOPssrl;
705 register I32 i;
706 register SV *sv;
707 I32 max;
708
4633a7c4 709 if (SvNIOKp(left) || !SvPOKp(left) ||
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710 (looks_like_number(left) && *SvPVX(left) != '0') ) {
711 i = SvIV(left);
712 max = SvIV(right);
713 if (max > i)
714 EXTEND(SP, max - i + 1);
715 while (i <= max) {
716 sv = sv_mortalcopy(&sv_no);
717 sv_setiv(sv,i++);
718 PUSHs(sv);
719 }
720 }
721 else {
722 SV *final = sv_mortalcopy(right);
723 STRLEN len;
724 char *tmps = SvPV(final, len);
725
726 sv = sv_mortalcopy(left);
4633a7c4 727 while (!SvNIOKp(sv) && SvCUR(sv) <= len &&
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728 strNE(SvPVX(sv),tmps) ) {
729 XPUSHs(sv);
730 sv = sv_2mortal(newSVsv(sv));
731 sv_inc(sv);
732 }
733 if (strEQ(SvPVX(sv),tmps))
734 XPUSHs(sv);
735 }
736 }
737 else {
738 dTOPss;
739 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
740 sv_inc(targ);
741 if ((op->op_private & OPpFLIP_LINENUM)
742 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
743 : SvTRUE(sv) ) {
744 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
745 sv_catpv(targ, "E0");
746 }
747 SETs(targ);
748 }
749
750 RETURN;
751}
752
753/* Control. */
754
755static I32
756dopoptolabel(label)
757char *label;
758{
759 register I32 i;
760 register CONTEXT *cx;
761
762 for (i = cxstack_ix; i >= 0; i--) {
763 cx = &cxstack[i];
764 switch (cx->cx_type) {
765 case CXt_SUBST:
766 if (dowarn)
767 warn("Exiting substitution via %s", op_name[op->op_type]);
768 break;
769 case CXt_SUB:
770 if (dowarn)
771 warn("Exiting subroutine via %s", op_name[op->op_type]);
772 break;
773 case CXt_EVAL:
774 if (dowarn)
775 warn("Exiting eval via %s", op_name[op->op_type]);
776 break;
777 case CXt_LOOP:
778 if (!cx->blk_loop.label ||
779 strNE(label, cx->blk_loop.label) ) {
780 DEBUG_l(deb("(Skipping label #%d %s)\n",
781 i, cx->blk_loop.label));
782 continue;
783 }
784 DEBUG_l( deb("(Found label #%d %s)\n", i, label));
785 return i;
786 }
787 }
788 return i;
789}
790
e50aee73
AD
791I32
792dowantarray()
793{
794 I32 cxix;
795
796 cxix = dopoptosub(cxstack_ix);
797 if (cxix < 0)
798 return G_SCALAR;
799
800 if (cxstack[cxix].blk_gimme == G_ARRAY)
801 return G_ARRAY;
802 else
803 return G_SCALAR;
804}
805
a0d0e21e
LW
806static I32
807dopoptosub(startingblock)
808I32 startingblock;
809{
810 I32 i;
811 register CONTEXT *cx;
812 for (i = startingblock; i >= 0; i--) {
813 cx = &cxstack[i];
814 switch (cx->cx_type) {
815 default:
816 continue;
817 case CXt_EVAL:
818 case CXt_SUB:
819 DEBUG_l( deb("(Found sub #%d)\n", i));
820 return i;
821 }
822 }
823 return i;
824}
825
826static I32
827dopoptoeval(startingblock)
828I32 startingblock;
829{
830 I32 i;
831 register CONTEXT *cx;
832 for (i = startingblock; i >= 0; i--) {
833 cx = &cxstack[i];
834 switch (cx->cx_type) {
835 default:
836 continue;
837 case CXt_EVAL:
838 DEBUG_l( deb("(Found eval #%d)\n", i));
839 return i;
840 }
841 }
842 return i;
843}
844
845static I32
846dopoptoloop(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 case CXt_SUBST:
855 if (dowarn)
856 warn("Exiting substitition via %s", op_name[op->op_type]);
857 break;
858 case CXt_SUB:
859 if (dowarn)
860 warn("Exiting subroutine via %s", op_name[op->op_type]);
861 break;
862 case CXt_EVAL:
863 if (dowarn)
864 warn("Exiting eval via %s", op_name[op->op_type]);
865 break;
866 case CXt_LOOP:
867 DEBUG_l( deb("(Found loop #%d)\n", i));
868 return i;
869 }
870 }
871 return i;
872}
873
874void
875dounwind(cxix)
876I32 cxix;
877{
878 register CONTEXT *cx;
879 SV **newsp;
880 I32 optype;
881
882 while (cxstack_ix > cxix) {
883 cx = &cxstack[cxstack_ix--];
884 DEBUG_l(fprintf(stderr, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
885 block_type[cx->cx_type]));
886 /* Note: we don't need to restore the base context info till the end. */
887 switch (cx->cx_type) {
888 case CXt_SUB:
889 POPSUB(cx);
890 break;
891 case CXt_EVAL:
892 POPEVAL(cx);
893 break;
894 case CXt_LOOP:
895 POPLOOP(cx);
896 break;
897 case CXt_SUBST:
898 break;
899 }
900 }
901}
902
ecfc5424 903#ifdef I_STDARG
a0d0e21e
LW
904OP *
905die(char* pat, ...)
906#else
907/*VARARGS0*/
908OP *
909die(pat, va_alist)
910 char *pat;
911 va_dcl
912#endif
913{
914 va_list args;
915 char *message;
916 int oldrunlevel = runlevel;
917 int was_in_eval = in_eval;
748a9306
LW
918 HV *stash;
919 GV *gv;
920 CV *cv;
a0d0e21e
LW
921
922#ifdef I_STDARG
923 va_start(args, pat);
924#else
925 va_start(args);
926#endif
927 message = mess(pat, &args);
928 va_end(args);
748a9306
LW
929 if (diehook && (cv = sv_2cv(diehook, &stash, &gv, 0)) && !CvDEPTH(cv)) {
930 dSP;
931
932 PUSHMARK(sp);
933 EXTEND(sp, 1);
934 PUSHs(sv_2mortal(newSVpv(message,0)));
935 PUTBACK;
936 perl_call_sv((SV*)cv, G_DISCARD);
937 }
a0d0e21e
LW
938 restartop = die_where(message);
939 if ((!restartop && was_in_eval) || oldrunlevel > 1)
a5f75d66 940 Siglongjmp(top_env, 3);
a0d0e21e
LW
941 return restartop;
942}
943
944OP *
945die_where(message)
946char *message;
947{
948 if (in_eval) {
949 I32 cxix;
950 register CONTEXT *cx;
951 I32 gimme;
952 SV **newsp;
953
4633a7c4
LW
954 if (in_eval & 4) {
955 SV **svp;
956 STRLEN klen = strlen(message);
957
958 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
959 if (svp) {
960 if (!SvIOK(*svp)) {
961 static char prefix[] = "\t(in cleanup) ";
962 sv_upgrade(*svp, SVt_IV);
963 (void)SvIOK_only(*svp);
964 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
965 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
966 sv_catpvn(GvSV(errgv), message, klen);
967 }
968 sv_inc(*svp);
969 }
970 }
971 else
c07a80fd 972 sv_setpv(GvSV(errgv), message);
4633a7c4 973
a0d0e21e
LW
974 cxix = dopoptoeval(cxstack_ix);
975 if (cxix >= 0) {
976 I32 optype;
977
978 if (cxix < cxstack_ix)
979 dounwind(cxix);
980
981 POPBLOCK(cx,curpm);
982 if (cx->cx_type != CXt_EVAL) {
983 fprintf(stderr, "panic: die %s", message);
984 my_exit(1);
985 }
986 POPEVAL(cx);
987
988 if (gimme == G_SCALAR)
989 *++newsp = &sv_undef;
990 stack_sp = newsp;
991
992 LEAVE;
748a9306 993
a0d0e21e 994 if (optype == OP_REQUIRE)
4633a7c4 995 DIE("%s", SvPVx(GvSV(errgv), na));
a0d0e21e
LW
996 return pop_return();
997 }
998 }
999 fputs(message, stderr);
a5f75d66 1000 (void)Fflush(stderr);
a6c477ed
PP
1001 if (e_tmpname) {
1002 if (e_fp) {
1003 fclose(e_fp);
1004 e_fp = Nullfp;
1005 }
a0d0e21e 1006 (void)UNLINK(e_tmpname);
a6c477ed
PP
1007 Safefree(e_tmpname);
1008 e_tmpname = Nullch;
e632a5f6 1009 }
748a9306
LW
1010 statusvalue = SHIFTSTATUS(statusvalue);
1011#ifdef VMS
1012 my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT);
1013#else
a0d0e21e 1014 my_exit((I32)((errno&255)?errno:((statusvalue&255)?statusvalue:255)));
748a9306 1015#endif
a0d0e21e
LW
1016 return 0;
1017}
1018
1019PP(pp_xor)
1020{
1021 dSP; dPOPTOPssrl;
1022 if (SvTRUE(left) != SvTRUE(right))
1023 RETSETYES;
1024 else
1025 RETSETNO;
1026}
1027
1028PP(pp_andassign)
1029{
1030 dSP;
1031 if (!SvTRUE(TOPs))
1032 RETURN;
1033 else
1034 RETURNOP(cLOGOP->op_other);
1035}
1036
1037PP(pp_orassign)
1038{
1039 dSP;
1040 if (SvTRUE(TOPs))
1041 RETURN;
1042 else
1043 RETURNOP(cLOGOP->op_other);
1044}
1045
1046#ifdef DEPRECATED
1047PP(pp_entersubr)
1048{
1049 dSP;
1050 SV** mark = (stack_base + *markstack_ptr + 1);
1051 SV* cv = *mark;
1052 while (mark < sp) { /* emulate old interface */
1053 *mark = mark[1];
1054 mark++;
1055 }
1056 *sp = cv;
1057 return pp_entersub();
1058}
1059#endif
1060
1061PP(pp_caller)
1062{
1063 dSP;
1064 register I32 cxix = dopoptosub(cxstack_ix);
1065 register CONTEXT *cx;
1066 I32 dbcxix;
1067 SV *sv;
1068 I32 count = 0;
1069
1070 if (MAXARG)
1071 count = POPi;
1072 EXTEND(SP, 6);
1073 for (;;) {
1074 if (cxix < 0) {
1075 if (GIMME != G_ARRAY)
1076 RETPUSHUNDEF;
1077 RETURN;
1078 }
1079 if (DBsub && cxix >= 0 &&
1080 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1081 count++;
1082 if (!count--)
1083 break;
1084 cxix = dopoptosub(cxix - 1);
1085 }
1086 cx = &cxstack[cxix];
06a5b730
PP
1087 if (cxstack[cxix].cx_type == CXt_SUB) {
1088 dbcxix = dopoptosub(cxix - 1);
1089 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1090 field below is defined for any cx. */
1091 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1092 cx = &cxstack[dbcxix];
1093 }
1094
a0d0e21e
LW
1095 if (GIMME != G_ARRAY) {
1096 dTARGET;
1097
1098 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1099 PUSHs(TARG);
1100 RETURN;
1101 }
a0d0e21e
LW
1102
1103 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1104 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1105 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1106 if (!MAXARG)
1107 RETURN;
06a5b730 1108 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
a0d0e21e
LW
1109 sv = NEWSV(49, 0);
1110 gv_efullname(sv, CvGV(cxstack[cxix].blk_sub.cv));
1111 PUSHs(sv_2mortal(sv));
1112 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1113 }
1114 else {
1115 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1116 PUSHs(sv_2mortal(newSViv(0)));
1117 }
1118 PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
4633a7c4 1119 if (cx->cx_type == CXt_EVAL) {
06a5b730 1120 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1121 PUSHs(cx->blk_eval.cur_text);
06a5b730
PP
1122 PUSHs(&sv_no);
1123 }
1124 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1125 /* Require, put the name. */
1126 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1127 PUSHs(&sv_yes);
1128 }
4633a7c4
LW
1129 }
1130 else if (cx->cx_type == CXt_SUB &&
1131 cx->blk_sub.hasargs &&
1132 curcop->cop_stash == debstash)
1133 {
a0d0e21e
LW
1134 AV *ary = cx->blk_sub.argarray;
1135 int off = AvARRAY(ary) - AvALLOC(ary);
1136
1137 if (!dbargs) {
1138 GV* tmpgv;
1139 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1140 SVt_PVAV)));
a5f75d66 1141 GvMULTI_on(tmpgv);
a0d0e21e
LW
1142 AvREAL_off(dbargs); /* XXX Should be REIFY */
1143 }
1144
1145 if (AvMAX(dbargs) < AvFILL(ary) + off)
1146 av_extend(dbargs, AvFILL(ary) + off);
1147 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1148 AvFILL(dbargs) = AvFILL(ary) + off;
1149 }
1150 RETURN;
1151}
1152
1153static int
1154sortcv(a, b)
1155const void *a;
1156const void *b;
1157{
1158 SV **str1 = (SV **) a;
1159 SV **str2 = (SV **) b;
748a9306 1160 I32 oldsaveix = savestack_ix;
a0d0e21e
LW
1161 I32 oldscopeix = scopestack_ix;
1162 I32 result;
1163 GvSV(firstgv) = *str1;
1164 GvSV(secondgv) = *str2;
1165 stack_sp = stack_base;
1166 op = sortcop;
a6c477ed 1167 runops();
a0d0e21e
LW
1168 if (stack_sp != stack_base + 1)
1169 croak("Sort subroutine didn't return single value");
748a9306 1170 if (!SvNIOKp(*stack_sp))
a0d0e21e
LW
1171 croak("Sort subroutine didn't return a numeric value");
1172 result = SvIV(*stack_sp);
1173 while (scopestack_ix > oldscopeix) {
1174 LEAVE;
1175 }
748a9306 1176 leave_scope(oldsaveix);
a0d0e21e
LW
1177 return result;
1178}
1179
1180static int
1181sortcmp(a, b)
1182const void *a;
1183const void *b;
1184{
1185 register SV *str1 = *(SV **) a;
1186 register SV *str2 = *(SV **) b;
1187 I32 retval;
1188
4633a7c4
LW
1189 if (!SvPOKp(str1)) {
1190 if (!SvPOKp(str2))
1191 return 0;
1192 else
1193 return -1;
1194 }
1195 if (!SvPOKp(str2))
1196 return 1;
1197
a0d0e21e
LW
1198 if (SvCUR(str1) < SvCUR(str2)) {
1199 /*SUPPRESS 560*/
1200 if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str1)))
1201 return retval;
1202 else
1203 return -1;
1204 }
1205 /*SUPPRESS 560*/
1206 else if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str2)))
1207 return retval;
1208 else if (SvCUR(str1) == SvCUR(str2))
1209 return 0;
1210 else
1211 return 1;
1212}
1213
1214PP(pp_reset)
1215{
1216 dSP;
1217 char *tmps;
1218
1219 if (MAXARG < 1)
1220 tmps = "";
1221 else
1222 tmps = POPp;
1223 sv_reset(tmps, curcop->cop_stash);
1224 PUSHs(&sv_yes);
1225 RETURN;
1226}
1227
1228PP(pp_lineseq)
1229{
1230 return NORMAL;
1231}
1232
1233PP(pp_dbstate)
1234{
1235 curcop = (COP*)op;
1236 TAINT_NOT; /* Each statement is presumed innocent */
1237 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1238 FREETMPS;
1239
1240 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1241 {
1242 SV **sp;
1243 register CV *cv;
1244 register CONTEXT *cx;
748a9306 1245 I32 gimme = G_ARRAY;
a0d0e21e
LW
1246 I32 hasargs;
1247 GV *gv;
1248
a0d0e21e
LW
1249 gv = DBgv;
1250 cv = GvCV(gv);
a0d0e21e
LW
1251 if (!cv)
1252 DIE("No DB::DB routine defined");
1253
06a5b730 1254 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1255 return NORMAL;
748a9306 1256
4633a7c4
LW
1257 ENTER;
1258 SAVETMPS;
1259
748a9306
LW
1260 SAVEI32(debug);
1261 SAVESPTR(stack_sp);
1262 debug = 0;
1263 hasargs = 0;
1264 sp = stack_sp;
1265
a0d0e21e 1266 push_return(op->op_next);
748a9306 1267 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e
LW
1268 PUSHSUB(cx);
1269 CvDEPTH(cv)++;
1270 (void)SvREFCNT_inc(cv);
1271 SAVESPTR(curpad);
1272 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1273 RETURNOP(CvSTART(cv));
1274 }
1275 else
1276 return NORMAL;
1277}
1278
1279PP(pp_scope)
1280{
1281 return NORMAL;
1282}
1283
1284PP(pp_enteriter)
1285{
1286 dSP; dMARK;
1287 register CONTEXT *cx;
1288 I32 gimme = GIMME;
1289 SV **svp;
1290
4633a7c4
LW
1291 ENTER;
1292 SAVETMPS;
1293
a0d0e21e
LW
1294 if (op->op_targ)
1295 svp = &curpad[op->op_targ]; /* "my" variable */
1296 else
1297 svp = &GvSV((GV*)POPs); /* symbol table variable */
1298
4633a7c4
LW
1299 SAVESPTR(*svp);
1300
a0d0e21e
LW
1301 ENTER;
1302
1303 PUSHBLOCK(cx, CXt_LOOP, SP);
1304 PUSHLOOP(cx, svp, MARK);
4633a7c4
LW
1305 if (op->op_flags & OPf_STACKED) {
1306 AV* av = (AV*)POPs;
1307 cx->blk_loop.iterary = av;
1308 cx->blk_loop.iterix = -1;
1309 }
1310 else {
1311 cx->blk_loop.iterary = stack;
1312 AvFILL(stack) = sp - stack_base;
1313 cx->blk_loop.iterix = MARK - stack_base;
1314 }
a0d0e21e
LW
1315
1316 RETURN;
1317}
1318
1319PP(pp_enterloop)
1320{
1321 dSP;
1322 register CONTEXT *cx;
1323 I32 gimme = GIMME;
1324
1325 ENTER;
1326 SAVETMPS;
1327 ENTER;
1328
1329 PUSHBLOCK(cx, CXt_LOOP, SP);
1330 PUSHLOOP(cx, 0, SP);
1331
1332 RETURN;
1333}
1334
1335PP(pp_leaveloop)
1336{
1337 dSP;
1338 register CONTEXT *cx;
1339 I32 gimme;
1340 SV **newsp;
1341 PMOP *newpm;
1342 SV **mark;
1343
1344 POPBLOCK(cx,newpm);
1345 mark = newsp;
1346 POPLOOP(cx);
1347 if (gimme == G_SCALAR) {
1348 if (op->op_private & OPpLEAVE_VOID)
1349 ;
1350 else {
1351 if (mark < SP)
1352 *++newsp = sv_mortalcopy(*SP);
1353 else
1354 *++newsp = &sv_undef;
1355 }
1356 }
1357 else {
1358 while (mark < SP)
1359 *++newsp = sv_mortalcopy(*++mark);
1360 }
1361 curpm = newpm; /* Don't pop $1 et al till now */
1362 sp = newsp;
1363 LEAVE;
1364 LEAVE;
1365
1366 RETURN;
1367}
1368
1369PP(pp_return)
1370{
1371 dSP; dMARK;
1372 I32 cxix;
1373 register CONTEXT *cx;
1374 I32 gimme;
1375 SV **newsp;
1376 PMOP *newpm;
1377 I32 optype = 0;
1378
1379 if (stack == sortstack) {
1380 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9
AD
1381 if (cxstack_ix > sortcxix)
1382 dounwind(sortcxix);
a0d0e21e
LW
1383 AvARRAY(stack)[1] = *SP;
1384 stack_sp = stack_base + 1;
1385 return 0;
1386 }
1387 }
1388
1389 cxix = dopoptosub(cxstack_ix);
1390 if (cxix < 0)
1391 DIE("Can't return outside a subroutine");
1392 if (cxix < cxstack_ix)
1393 dounwind(cxix);
1394
1395 POPBLOCK(cx,newpm);
1396 switch (cx->cx_type) {
1397 case CXt_SUB:
1398 POPSUB(cx);
1399 break;
1400 case CXt_EVAL:
1401 POPEVAL(cx);
748a9306
LW
1402 if (optype == OP_REQUIRE &&
1403 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1404 {
1405 char *name = cx->blk_eval.old_name;
1406 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1407 DIE("%s did not return a true value", name);
1408 }
a0d0e21e
LW
1409 break;
1410 default:
1411 DIE("panic: return");
1412 break;
1413 }
1414
1415 if (gimme == G_SCALAR) {
1416 if (MARK < SP)
1417 *++newsp = sv_mortalcopy(*SP);
1418 else
1419 *++newsp = &sv_undef;
a0d0e21e
LW
1420 }
1421 else {
a0d0e21e
LW
1422 while (MARK < SP)
1423 *++newsp = sv_mortalcopy(*++MARK);
1424 }
1425 curpm = newpm; /* Don't pop $1 et al till now */
1426 stack_sp = newsp;
1427
1428 LEAVE;
1429 return pop_return();
1430}
1431
1432PP(pp_last)
1433{
1434 dSP;
1435 I32 cxix;
1436 register CONTEXT *cx;
1437 I32 gimme;
1438 I32 optype;
1439 OP *nextop;
1440 SV **newsp;
1441 PMOP *newpm;
1442 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1443
1444 if (op->op_flags & OPf_SPECIAL) {
1445 cxix = dopoptoloop(cxstack_ix);
1446 if (cxix < 0)
1447 DIE("Can't \"last\" outside a block");
1448 }
1449 else {
1450 cxix = dopoptolabel(cPVOP->op_pv);
1451 if (cxix < 0)
1452 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1453 }
1454 if (cxix < cxstack_ix)
1455 dounwind(cxix);
1456
1457 POPBLOCK(cx,newpm);
1458 switch (cx->cx_type) {
1459 case CXt_LOOP:
1460 POPLOOP(cx);
1461 nextop = cx->blk_loop.last_op->op_next;
1462 LEAVE;
1463 break;
1464 case CXt_EVAL:
1465 POPEVAL(cx);
1466 nextop = pop_return();
1467 break;
1468 case CXt_SUB:
1469 POPSUB(cx);
1470 nextop = pop_return();
1471 break;
1472 default:
1473 DIE("panic: last");
1474 break;
1475 }
1476
1477 if (gimme == G_SCALAR) {
1478 if (mark < SP)
1479 *++newsp = sv_mortalcopy(*SP);
1480 else
1481 *++newsp = &sv_undef;
1482 }
1483 else {
1484 while (mark < SP)
1485 *++newsp = sv_mortalcopy(*++mark);
1486 }
1487 curpm = newpm; /* Don't pop $1 et al till now */
1488 sp = newsp;
1489
1490 LEAVE;
1491 RETURNOP(nextop);
1492}
1493
1494PP(pp_next)
1495{
1496 I32 cxix;
1497 register CONTEXT *cx;
1498 I32 oldsave;
1499
1500 if (op->op_flags & OPf_SPECIAL) {
1501 cxix = dopoptoloop(cxstack_ix);
1502 if (cxix < 0)
1503 DIE("Can't \"next\" outside a block");
1504 }
1505 else {
1506 cxix = dopoptolabel(cPVOP->op_pv);
1507 if (cxix < 0)
1508 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1509 }
1510 if (cxix < cxstack_ix)
1511 dounwind(cxix);
1512
1513 TOPBLOCK(cx);
1514 oldsave = scopestack[scopestack_ix - 1];
1515 LEAVE_SCOPE(oldsave);
1516 return cx->blk_loop.next_op;
1517}
1518
1519PP(pp_redo)
1520{
1521 I32 cxix;
1522 register CONTEXT *cx;
1523 I32 oldsave;
1524
1525 if (op->op_flags & OPf_SPECIAL) {
1526 cxix = dopoptoloop(cxstack_ix);
1527 if (cxix < 0)
1528 DIE("Can't \"redo\" outside a block");
1529 }
1530 else {
1531 cxix = dopoptolabel(cPVOP->op_pv);
1532 if (cxix < 0)
1533 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1534 }
1535 if (cxix < cxstack_ix)
1536 dounwind(cxix);
1537
1538 TOPBLOCK(cx);
1539 oldsave = scopestack[scopestack_ix - 1];
1540 LEAVE_SCOPE(oldsave);
1541 return cx->blk_loop.redo_op;
1542}
1543
1544static OP* lastgotoprobe;
1545
1546static OP *
1547dofindlabel(op,label,opstack)
1548OP *op;
1549char *label;
1550OP **opstack;
1551{
1552 OP *kid;
1553 OP **ops = opstack;
1554
1555 if (op->op_type == OP_LEAVE ||
1556 op->op_type == OP_SCOPE ||
1557 op->op_type == OP_LEAVELOOP ||
1558 op->op_type == OP_LEAVETRY)
1559 *ops++ = cUNOP->op_first;
1560 *ops = 0;
1561 if (op->op_flags & OPf_KIDS) {
1562 /* First try all the kids at this level, since that's likeliest. */
1563 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1564 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1565 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1566 return kid;
1567 }
1568 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1569 if (kid == lastgotoprobe)
1570 continue;
1571 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1572 if (ops > opstack &&
1573 (ops[-1]->op_type == OP_NEXTSTATE ||
1574 ops[-1]->op_type == OP_DBSTATE))
1575 *ops = kid;
1576 else
1577 *ops++ = kid;
1578 }
1579 if (op = dofindlabel(kid,label,ops))
1580 return op;
1581 }
1582 }
1583 *ops = 0;
1584 return 0;
1585}
1586
1587PP(pp_dump)
1588{
1589 return pp_goto(ARGS);
1590 /*NOTREACHED*/
1591}
1592
1593PP(pp_goto)
1594{
1595 dSP;
1596 OP *retop = 0;
1597 I32 ix;
1598 register CONTEXT *cx;
1599 OP *enterops[64];
1600 char *label;
1601 int do_dump = (op->op_type == OP_DUMP);
1602
1603 label = 0;
1604 if (op->op_flags & OPf_STACKED) {
1605 SV *sv = POPs;
1606
1607 /* This egregious kludge implements goto &subroutine */
1608 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1609 I32 cxix;
1610 register CONTEXT *cx;
1611 CV* cv = (CV*)SvRV(sv);
1612 SV** mark;
1613 I32 items = 0;
1614 I32 oldsave;
1615
4aa0a1f7
AD
1616 if (!CvROOT(cv) && !CvXSUB(cv)) {
1617 if (CvGV(cv)) {
1618 SV *tmpstr = sv_newmortal();
1619 gv_efullname(tmpstr, CvGV(cv));
1620 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1621 }
1622 DIE("Goto undefined subroutine");
1623 }
1624
a0d0e21e
LW
1625 /* First do some returnish stuff. */
1626 cxix = dopoptosub(cxstack_ix);
1627 if (cxix < 0)
1628 DIE("Can't goto subroutine outside a subroutine");
1629 if (cxix < cxstack_ix)
1630 dounwind(cxix);
1631 TOPBLOCK(cx);
1632 mark = stack_sp;
1633 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1634 AV* av = cx->blk_sub.argarray;
1635
1636 items = AvFILL(av) + 1;
1637 Copy(AvARRAY(av), ++stack_sp, items, SV*);
1638 stack_sp += items;
1639 GvAV(defgv) = cx->blk_sub.savearray;
a0d0e21e 1640 AvREAL_off(av);
4633a7c4 1641 av_clear(av);
a0d0e21e
LW
1642 }
1643 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1644 SvREFCNT_dec(cx->blk_sub.cv);
1645 oldsave = scopestack[scopestack_ix - 1];
1646 LEAVE_SCOPE(oldsave);
1647
1648 /* Now do some callish stuff. */
1649 SAVETMPS;
1650 if (CvXSUB(cv)) {
1651 if (CvOLDSTYLE(cv)) {
ecfc5424 1652 I32 (*fp3)_((int,int,int));
a0d0e21e
LW
1653 while (sp > mark) {
1654 sp[1] = sp[0];
1655 sp--;
1656 }
ecfc5424
AD
1657 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1658 items = (*fp3)(CvXSUBANY(cv).any_i32,
1659 mark - stack_base + 1,
1660 items);
a0d0e21e
LW
1661 sp = stack_base + items;
1662 }
1663 else {
1664 (void)(*CvXSUB(cv))(cv);
1665 }
1666 LEAVE;
1667 return pop_return();
1668 }
1669 else {
1670 AV* padlist = CvPADLIST(cv);
1671 SV** svp = AvARRAY(padlist);
1672 cx->blk_sub.cv = cv;
1673 cx->blk_sub.olddepth = CvDEPTH(cv);
1674 CvDEPTH(cv)++;
1675 if (CvDEPTH(cv) < 2)
1676 (void)SvREFCNT_inc(cv);
1677 else { /* save temporaries on recursion? */
1678 if (CvDEPTH(cv) == 100 && dowarn)
1679 warn("Deep recursion on subroutine \"%s\"",
1680 GvENAME(CvGV(cv)));
1681 if (CvDEPTH(cv) > AvFILL(padlist)) {
1682 AV *newpad = newAV();
4aa0a1f7 1683 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e
LW
1684 I32 ix = AvFILL((AV*)svp[1]);
1685 svp = AvARRAY(svp[0]);
748a9306 1686 for ( ;ix > 0; ix--) {
a0d0e21e 1687 if (svp[ix] != &sv_undef) {
748a9306
LW
1688 char *name = SvPVX(svp[ix]);
1689 if (SvFLAGS(svp[ix]) & SVf_FAKE) {
1690 /* outer lexical? */
1691 av_store(newpad, ix,
4aa0a1f7 1692 SvREFCNT_inc(oldpad[ix]) );
748a9306
LW
1693 }
1694 else { /* our own lexical */
1695 if (*name == '@')
1696 av_store(newpad, ix, sv = (SV*)newAV());
1697 else if (*name == '%')
1698 av_store(newpad, ix, sv = (SV*)newHV());
1699 else
1700 av_store(newpad, ix, sv = NEWSV(0,0));
1701 SvPADMY_on(sv);
1702 }
a0d0e21e
LW
1703 }
1704 else {
748a9306 1705 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e
LW
1706 SvPADTMP_on(sv);
1707 }
1708 }
1709 if (cx->blk_sub.hasargs) {
1710 AV* av = newAV();
1711 av_extend(av, 0);
1712 av_store(newpad, 0, (SV*)av);
1713 AvFLAGS(av) = AVf_REIFY;
1714 }
1715 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1716 AvFILL(padlist) = CvDEPTH(cv);
1717 svp = AvARRAY(padlist);
1718 }
1719 }
1720 SAVESPTR(curpad);
1721 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1722 if (cx->blk_sub.hasargs) {
1723 AV* av = (AV*)curpad[0];
1724 SV** ary;
1725
1726 cx->blk_sub.savearray = GvAV(defgv);
1727 cx->blk_sub.argarray = av;
1728 GvAV(defgv) = cx->blk_sub.argarray;
1729 ++mark;
1730
1731 if (items >= AvMAX(av) + 1) {
1732 ary = AvALLOC(av);
1733 if (AvARRAY(av) != ary) {
1734 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1735 SvPVX(av) = (char*)ary;
1736 }
1737 if (items >= AvMAX(av) + 1) {
1738 AvMAX(av) = items - 1;
1739 Renew(ary,items+1,SV*);
1740 AvALLOC(av) = ary;
1741 SvPVX(av) = (char*)ary;
1742 }
1743 }
1744 Copy(mark,AvARRAY(av),items,SV*);
1745 AvFILL(av) = items - 1;
1746
1747 while (items--) {
1748 if (*mark)
1749 SvTEMP_off(*mark);
1750 mark++;
1751 }
1752 }
1753 RETURNOP(CvSTART(cv));
1754 }
1755 }
1756 else
1757 label = SvPV(sv,na);
1758 }
1759 else if (op->op_flags & OPf_SPECIAL) {
1760 if (! do_dump)
1761 DIE("goto must have label");
1762 }
1763 else
1764 label = cPVOP->op_pv;
1765
1766 if (label && *label) {
1767 OP *gotoprobe = 0;
1768
1769 /* find label */
1770
1771 lastgotoprobe = 0;
1772 *enterops = 0;
1773 for (ix = cxstack_ix; ix >= 0; ix--) {
1774 cx = &cxstack[ix];
1775 switch (cx->cx_type) {
1776 case CXt_SUB:
1777 gotoprobe = CvROOT(cx->blk_sub.cv);
1778 break;
1779 case CXt_EVAL:
1780 gotoprobe = eval_root; /* XXX not good for nested eval */
1781 break;
1782 case CXt_LOOP:
1783 gotoprobe = cx->blk_oldcop->op_sibling;
1784 break;
1785 case CXt_SUBST:
1786 continue;
1787 case CXt_BLOCK:
1788 if (ix)
1789 gotoprobe = cx->blk_oldcop->op_sibling;
1790 else
1791 gotoprobe = main_root;
1792 break;
1793 default:
1794 if (ix)
1795 DIE("panic: goto");
1796 else
1797 gotoprobe = main_root;
1798 break;
1799 }
1800 retop = dofindlabel(gotoprobe, label, enterops);
1801 if (retop)
1802 break;
1803 lastgotoprobe = gotoprobe;
1804 }
1805 if (!retop)
1806 DIE("Can't find label %s", label);
1807
1808 /* pop unwanted frames */
1809
1810 if (ix < cxstack_ix) {
1811 I32 oldsave;
1812
1813 if (ix < 0)
1814 ix = 0;
1815 dounwind(ix);
1816 TOPBLOCK(cx);
1817 oldsave = scopestack[scopestack_ix];
1818 LEAVE_SCOPE(oldsave);
1819 }
1820
1821 /* push wanted frames */
1822
748a9306 1823 if (*enterops && enterops[1]) {
a0d0e21e 1824 OP *oldop = op;
748a9306 1825 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e
LW
1826 op = enterops[ix];
1827 (*op->op_ppaddr)();
1828 }
1829 op = oldop;
1830 }
1831 }
1832
1833 if (do_dump) {
a5f75d66
AD
1834#ifdef VMS
1835 if (!retop) retop = main_start;
1836#endif
a0d0e21e
LW
1837 restartop = retop;
1838 do_undump = TRUE;
1839
1840 my_unexec();
1841
1842 restartop = 0; /* hmm, must be GNU unexec().. */
1843 do_undump = FALSE;
1844 }
1845
748a9306
LW
1846 if (stack == signalstack) {
1847 restartop = retop;
a5f75d66 1848 Siglongjmp(top_env, 3);
748a9306
LW
1849 }
1850
a0d0e21e
LW
1851 RETURNOP(retop);
1852}
1853
1854PP(pp_exit)
1855{
1856 dSP;
1857 I32 anum;
1858
1859 if (MAXARG < 1)
1860 anum = 0;
1861 else
1862 anum = SvIVx(POPs);
1863 my_exit(anum);
1864 PUSHs(&sv_undef);
1865 RETURN;
1866}
1867
1868#ifdef NOTYET
1869PP(pp_nswitch)
1870{
1871 dSP;
1872 double value = SvNVx(GvSV(cCOP->cop_gv));
1873 register I32 match = I_32(value);
1874
1875 if (value < 0.0) {
1876 if (((double)match) > value)
1877 --match; /* was fractional--truncate other way */
1878 }
1879 match -= cCOP->uop.scop.scop_offset;
1880 if (match < 0)
1881 match = 0;
1882 else if (match > cCOP->uop.scop.scop_max)
1883 match = cCOP->uop.scop.scop_max;
1884 op = cCOP->uop.scop.scop_next[match];
1885 RETURNOP(op);
1886}
1887
1888PP(pp_cswitch)
1889{
1890 dSP;
1891 register I32 match;
1892
1893 if (multiline)
1894 op = op->op_next; /* can't assume anything */
1895 else {
1896 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1897 match -= cCOP->uop.scop.scop_offset;
1898 if (match < 0)
1899 match = 0;
1900 else if (match > cCOP->uop.scop.scop_max)
1901 match = cCOP->uop.scop.scop_max;
1902 op = cCOP->uop.scop.scop_next[match];
1903 }
1904 RETURNOP(op);
1905}
1906#endif
1907
1908/* Eval. */
1909
1910static void
1911save_lines(array, sv)
1912AV *array;
1913SV *sv;
1914{
1915 register char *s = SvPVX(sv);
1916 register char *send = SvPVX(sv) + SvCUR(sv);
1917 register char *t;
1918 register I32 line = 1;
1919
1920 while (s && s < send) {
1921 SV *tmpstr = NEWSV(85,0);
1922
1923 sv_upgrade(tmpstr, SVt_PVMG);
1924 t = strchr(s, '\n');
1925 if (t)
1926 t++;
1927 else
1928 t = send;
1929
1930 sv_setpvn(tmpstr, s, t - s);
1931 av_store(array, line++, tmpstr);
1932 s = t;
1933 }
1934}
1935
1936static OP *
1937doeval(gimme)
1938int gimme;
1939{
1940 dSP;
1941 OP *saveop = op;
1942 HV *newstash;
748a9306 1943 AV* comppadlist;
a0d0e21e
LW
1944
1945 in_eval = 1;
1946
1947 /* set up a scratch pad */
1948
1949 SAVEINT(padix);
1950 SAVESPTR(curpad);
1951 SAVESPTR(comppad);
1952 SAVESPTR(comppad_name);
1953 SAVEINT(comppad_name_fill);
1954 SAVEINT(min_intro_pending);
1955 SAVEINT(max_intro_pending);
748a9306
LW
1956
1957 SAVESPTR(compcv);
1958 compcv = (CV*)NEWSV(1104,0);
1959 sv_upgrade((SV *)compcv, SVt_PVCV);
1960
a0d0e21e
LW
1961 comppad = newAV();
1962 comppad_name = newAV();
1963 comppad_name_fill = 0;
1964 min_intro_pending = 0;
1965 av_push(comppad, Nullsv);
1966 curpad = AvARRAY(comppad);
1967 padix = 0;
1968
748a9306
LW
1969 comppadlist = newAV();
1970 AvREAL_off(comppadlist);
8e07c86e
AD
1971 av_store(comppadlist, 0, (SV*)comppad_name);
1972 av_store(comppadlist, 1, (SV*)comppad);
748a9306 1973 CvPADLIST(compcv) = comppadlist;
8e07c86e 1974 SAVEFREESV(compcv);
748a9306 1975
a0d0e21e
LW
1976 /* make sure we compile in the right package */
1977
1978 newstash = curcop->cop_stash;
1979 if (curstash != newstash) {
1980 SAVESPTR(curstash);
1981 curstash = newstash;
1982 }
1983 SAVESPTR(beginav);
1984 beginav = newAV();
1985 SAVEFREESV(beginav);
1986
1987 /* try to compile it */
1988
1989 eval_root = Nullop;
1990 error_count = 0;
1991 curcop = &compiling;
1992 curcop->cop_arybase = 0;
c07a80fd
PP
1993 SvREFCNT_dec(rs);
1994 rs = newSVpv("\n", 1);
4633a7c4 1995 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
1996 if (yyparse() || error_count || !eval_root) {
1997 SV **newsp;
1998 I32 gimme;
1999 CONTEXT *cx;
2000 I32 optype;
2001
2002 op = saveop;
2003 if (eval_root) {
2004 op_free(eval_root);
2005 eval_root = Nullop;
2006 }
2007 POPBLOCK(cx,curpm);
2008 POPEVAL(cx);
2009 pop_return();
2010 lex_end();
2011 LEAVE;
2012 if (optype == OP_REQUIRE)
4633a7c4 2013 DIE("%s", SvPVx(GvSV(errgv), na));
c07a80fd
PP
2014 SvREFCNT_dec(rs);
2015 rs = SvREFCNT_inc(nrs);
a0d0e21e
LW
2016 RETPUSHUNDEF;
2017 }
c07a80fd
PP
2018 SvREFCNT_dec(rs);
2019 rs = SvREFCNT_inc(nrs);
a0d0e21e 2020 compiling.cop_line = 0;
a0d0e21e
LW
2021 SAVEFREEOP(eval_root);
2022 if (gimme & G_ARRAY)
2023 list(eval_root);
2024 else
2025 scalar(eval_root);
2026
2027 DEBUG_x(dump_eval());
2028
2029 /* compiled okay, so do it */
2030
2031 RETURNOP(eval_start);
2032}
2033
2034PP(pp_require)
2035{
2036 dSP;
2037 register CONTEXT *cx;
2038 SV *sv;
2039 char *name;
2040 char *tmpname;
2041 SV** svp;
2042 I32 gimme = G_SCALAR;
2043 FILE *tryrsfp = 0;
2044
2045 sv = POPs;
4633a7c4 2046 if (SvNIOKp(sv) && !SvPOKp(sv)) {
a5f75d66
AD
2047 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2048 DIE("Perl %s required--this is only version %s, stopped",
2049 SvPV(sv,na),patchlevel);
a0d0e21e
LW
2050 RETPUSHYES;
2051 }
2052 name = SvPV(sv, na);
2053 if (!*name)
2054 DIE("Null filename used");
4633a7c4 2055 TAINT_PROPER("require");
a0d0e21e
LW
2056 if (op->op_type == OP_REQUIRE &&
2057 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2058 *svp != &sv_undef)
2059 RETPUSHYES;
2060
2061 /* prepare to compile file */
2062
2063 tmpname = savepv(name);
2064 if (*tmpname == '/' ||
2065 (*tmpname == '.' &&
2066 (tmpname[1] == '/' ||
748a9306 2067 (tmpname[1] == '.' && tmpname[2] == '/')))
4633a7c4
LW
2068#ifdef DOSISH
2069 || (tmpname[0] && tmpname[1] == ':')
2070#endif
748a9306 2071#ifdef VMS
4633a7c4
LW
2072 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2073 (tmpname[1] == '-' || tmpname[1] == ']' || tmpname[1] == '>')))
748a9306
LW
2074#endif
2075 )
a0d0e21e
LW
2076 {
2077 tryrsfp = fopen(tmpname,"r");
2078 }
2079 else {
2080 AV *ar = GvAVn(incgv);
2081 I32 i;
2082
2083 for (i = 0; i <= AvFILL(ar); i++) {
748a9306
LW
2084#ifdef VMS
2085 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
4633a7c4
LW
2086 continue;
2087 strcat(buf,name);
748a9306 2088#else
a0d0e21e
LW
2089 (void)sprintf(buf, "%s/%s",
2090 SvPVx(*av_fetch(ar, i, TRUE), na), name);
748a9306 2091#endif
a0d0e21e
LW
2092 tryrsfp = fopen(buf, "r");
2093 if (tryrsfp) {
2094 char *s = buf;
2095
2096 if (*s == '.' && s[1] == '/')
2097 s += 2;
2098 Safefree(tmpname);
2099 tmpname = savepv(s);
2100 break;
2101 }
2102 }
2103 }
2104 SAVESPTR(compiling.cop_filegv);
2105 compiling.cop_filegv = gv_fetchfile(tmpname);
2106 Safefree(tmpname);
2107 tmpname = Nullch;
2108 if (!tryrsfp) {
2109 if (op->op_type == OP_REQUIRE) {
2110 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2111 if (instr(tokenbuf,".h "))
2112 strcat(tokenbuf," (change .h to .ph maybe?)");
2113 if (instr(tokenbuf,".ph "))
2114 strcat(tokenbuf," (did you run h2ph?)");
2115 DIE("%s",tokenbuf);
2116 }
2117
2118 RETPUSHUNDEF;
2119 }
2120
2121 /* Assume success here to prevent recursive requirement. */
2122 (void)hv_store(GvHVn(incgv), name, strlen(name),
2123 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2124
2125 ENTER;
2126 SAVETMPS;
2127 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73
AD
2128 if (rsfp_filters){
2129 save_aptr(&rsfp_filters);
2130 rsfp_filters = NULL;
2131 }
2132
a0d0e21e
LW
2133 rsfp = tryrsfp;
2134 name = savepv(name);
2135 SAVEFREEPV(name);
2136 SAVEI32(hints);
2137 hints = 0;
2138
2139 /* switch to eval mode */
2140
2141 push_return(op->op_next);
2142 PUSHBLOCK(cx, CXt_EVAL, SP);
2143 PUSHEVAL(cx, name, compiling.cop_filegv);
2144
2145 compiling.cop_line = 0;
2146
2147 PUTBACK;
2148 return doeval(G_SCALAR);
2149}
2150
2151PP(pp_dofile)
2152{
2153 return pp_require(ARGS);
2154}
2155
2156PP(pp_entereval)
2157{
2158 dSP;
2159 register CONTEXT *cx;
2160 dPOPss;
2161 I32 gimme = GIMME;
2162 char tmpbuf[32];
2163 STRLEN len;
2164
2165 if (!SvPV(sv,len) || !len)
2166 RETPUSHUNDEF;
748a9306 2167 TAINT_PROPER("eval");
a0d0e21e
LW
2168
2169 ENTER;
a0d0e21e 2170 lex_start(sv);
748a9306 2171 SAVETMPS;
a0d0e21e
LW
2172
2173 /* switch to eval mode */
2174
748a9306 2175 SAVESPTR(compiling.cop_filegv);
a0d0e21e
LW
2176 sprintf(tmpbuf, "_<(eval %d)", ++evalseq);
2177 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2178 compiling.cop_line = 1;
2179 SAVEDELETE(defstash, savepv(tmpbuf), strlen(tmpbuf));
2180 SAVEI32(hints);
2181 hints = op->op_targ;
2182
2183 push_return(op->op_next);
2184 PUSHBLOCK(cx, CXt_EVAL, SP);
2185 PUSHEVAL(cx, 0, compiling.cop_filegv);
2186
2187 /* prepare to compile string */
2188
2189 if (perldb && curstash != debstash)
2190 save_lines(GvAV(compiling.cop_filegv), linestr);
2191 PUTBACK;
2192 return doeval(gimme);
2193}
2194
2195PP(pp_leaveeval)
2196{
2197 dSP;
2198 register SV **mark;
2199 SV **newsp;
2200 PMOP *newpm;
2201 I32 gimme;
2202 register CONTEXT *cx;
2203 OP *retop;
2204 I32 optype;
2205
2206 POPBLOCK(cx,newpm);
2207 POPEVAL(cx);
2208 retop = pop_return();
2209
2210 if (gimme == G_SCALAR) {
2211 if (op->op_private & OPpLEAVE_VOID)
2212 MARK = newsp;
2213 else {
2214 MARK = newsp + 1;
2215 if (MARK <= SP) {
2216 if (SvFLAGS(TOPs) & SVs_TEMP)
2217 *MARK = TOPs;
2218 else
2219 *MARK = sv_mortalcopy(TOPs);
2220 }
2221 else {
2222 MEXTEND(mark,0);
2223 *MARK = &sv_undef;
2224 }
2225 }
2226 SP = MARK;
2227 }
2228 else {
2229 for (mark = newsp + 1; mark <= SP; mark++)
2230 if (!(SvFLAGS(TOPs) & SVs_TEMP))
2231 *mark = sv_mortalcopy(*mark);
2232 /* in case LEAVE wipes old return values */
2233 }
2234 curpm = newpm; /* Don't pop $1 et al till now */
2235
2236 if (optype != OP_ENTEREVAL) {
2237 char *name = cx->blk_eval.old_name;
2238
2239 if (!(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
2240 /* Unassume the success we assumed earlier. */
748a9306 2241 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
a0d0e21e
LW
2242
2243 if (optype == OP_REQUIRE)
2244 retop = die("%s did not return a true value", name);
2245 }
2246 }
2247
2248 lex_end();
2249 LEAVE;
4633a7c4 2250 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2251
2252 RETURNOP(retop);
2253}
2254
a0d0e21e
LW
2255PP(pp_entertry)
2256{
2257 dSP;
2258 register CONTEXT *cx;
2259 I32 gimme = GIMME;
2260
2261 ENTER;
2262 SAVETMPS;
2263
2264 push_return(cLOGOP->op_other->op_next);
2265 PUSHBLOCK(cx, CXt_EVAL, SP);
2266 PUSHEVAL(cx, 0, 0);
2267 eval_root = op; /* Only needed so that goto works right. */
2268
2269 in_eval = 1;
4633a7c4 2270 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2271 RETURN;
2272}
2273
2274PP(pp_leavetry)
2275{
2276 dSP;
2277 register SV **mark;
2278 SV **newsp;
2279 PMOP *newpm;
2280 I32 gimme;
2281 register CONTEXT *cx;
2282 I32 optype;
2283
2284 POPBLOCK(cx,newpm);
2285 POPEVAL(cx);
2286 pop_return();
2287
2288 if (gimme == G_SCALAR) {
2289 if (op->op_private & OPpLEAVE_VOID)
2290 MARK = newsp;
2291 else {
2292 MARK = newsp + 1;
2293 if (MARK <= SP) {
2294 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2295 *MARK = TOPs;
2296 else
2297 *MARK = sv_mortalcopy(TOPs);
2298 }
2299 else {
2300 MEXTEND(mark,0);
2301 *MARK = &sv_undef;
2302 }
2303 }
2304 SP = MARK;
2305 }
2306 else {
2307 for (mark = newsp + 1; mark <= SP; mark++)
2308 if (!(SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)))
2309 *mark = sv_mortalcopy(*mark);
2310 /* in case LEAVE wipes old return values */
2311 }
2312 curpm = newpm; /* Don't pop $1 et al till now */
2313
2314 LEAVE;
4633a7c4 2315 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2316 RETURN;
2317}
2318
2319static void
2320doparseform(sv)
2321SV *sv;
2322{
2323 STRLEN len;
2324 register char *s = SvPV_force(sv, len);
2325 register char *send = s + len;
2326 register char *base;
2327 register I32 skipspaces = 0;
2328 bool noblank;
2329 bool repeat;
2330 bool postspace = FALSE;
2331 U16 *fops;
2332 register U16 *fpc;
2333 U16 *linepc;
2334 register I32 arg;
2335 bool ischop;
2336
2337 New(804, fops, (send - s)*3+2, U16); /* Almost certainly too long... */
2338 fpc = fops;
2339
2340 if (s < send) {
2341 linepc = fpc;
2342 *fpc++ = FF_LINEMARK;
2343 noblank = repeat = FALSE;
2344 base = s;
2345 }
2346
2347 while (s <= send) {
2348 switch (*s++) {
2349 default:
2350 skipspaces = 0;
2351 continue;
2352
2353 case '~':
2354 if (*s == '~') {
2355 repeat = TRUE;
2356 *s = ' ';
2357 }
2358 noblank = TRUE;
2359 s[-1] = ' ';
2360 /* FALL THROUGH */
2361 case ' ': case '\t':
2362 skipspaces++;
2363 continue;
2364
2365 case '\n': case 0:
2366 arg = s - base;
2367 skipspaces++;
2368 arg -= skipspaces;
2369 if (arg) {
2370 if (postspace) {
2371 *fpc++ = FF_SPACE;
2372 postspace = FALSE;
2373 }
2374 *fpc++ = FF_LITERAL;
2375 *fpc++ = arg;
2376 }
2377 if (s <= send)
2378 skipspaces--;
2379 if (skipspaces) {
2380 *fpc++ = FF_SKIP;
2381 *fpc++ = skipspaces;
2382 }
2383 skipspaces = 0;
2384 if (s <= send)
2385 *fpc++ = FF_NEWLINE;
2386 if (noblank) {
2387 *fpc++ = FF_BLANK;
2388 if (repeat)
2389 arg = fpc - linepc + 1;
2390 else
2391 arg = 0;
2392 *fpc++ = arg;
2393 }
2394 if (s < send) {
2395 linepc = fpc;
2396 *fpc++ = FF_LINEMARK;
2397 noblank = repeat = FALSE;
2398 base = s;
2399 }
2400 else
2401 s++;
2402 continue;
2403
2404 case '@':
2405 case '^':
2406 ischop = s[-1] == '^';
2407
2408 if (postspace) {
2409 *fpc++ = FF_SPACE;
2410 postspace = FALSE;
2411 }
2412 arg = (s - base) - 1;
2413 if (arg) {
2414 *fpc++ = FF_LITERAL;
2415 *fpc++ = arg;
2416 }
2417
2418 base = s - 1;
2419 *fpc++ = FF_FETCH;
2420 if (*s == '*') {
2421 s++;
2422 *fpc++ = 0;
2423 *fpc++ = FF_LINEGLOB;
2424 }
2425 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2426 arg = ischop ? 512 : 0;
2427 base = s - 1;
2428 while (*s == '#')
2429 s++;
2430 if (*s == '.') {
2431 char *f;
2432 s++;
2433 f = s;
2434 while (*s == '#')
2435 s++;
2436 arg |= 256 + (s - f);
2437 }
2438 *fpc++ = s - base; /* fieldsize for FETCH */
2439 *fpc++ = FF_DECIMAL;
2440 *fpc++ = arg;
2441 }
2442 else {
2443 I32 prespace = 0;
2444 bool ismore = FALSE;
2445
2446 if (*s == '>') {
2447 while (*++s == '>') ;
2448 prespace = FF_SPACE;
2449 }
2450 else if (*s == '|') {
2451 while (*++s == '|') ;
2452 prespace = FF_HALFSPACE;
2453 postspace = TRUE;
2454 }
2455 else {
2456 if (*s == '<')
2457 while (*++s == '<') ;
2458 postspace = TRUE;
2459 }
2460 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2461 s += 3;
2462 ismore = TRUE;
2463 }
2464 *fpc++ = s - base; /* fieldsize for FETCH */
2465
2466 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2467
2468 if (prespace)
2469 *fpc++ = prespace;
2470 *fpc++ = FF_ITEM;
2471 if (ismore)
2472 *fpc++ = FF_MORE;
2473 if (ischop)
2474 *fpc++ = FF_CHOP;
2475 }
2476 base = s;
2477 skipspaces = 0;
2478 continue;
2479 }
2480 }
2481 *fpc++ = FF_END;
2482
2483 arg = fpc - fops;
2484 { /* need to jump to the next word */
2485 int z;
2486 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2487 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2488 s = SvPVX(sv) + SvCUR(sv) + z;
2489 }
2490 Copy(fops, s, arg, U16);
2491 Safefree(fops);
2492 SvCOMPILED_on(sv);
2493}