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[p5sagit/p5-mst-13.2.git] / pp_ctl.c
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a0d0e21e 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
4633a7c4 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
4633a7c4 79 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
80 pm->op_pmregexp = pregcomp(t, t + len, pm);
81 }
a0d0e21e 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) {
a0d0e21e 89 pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
90 hoistmust(pm);
91 cLOGOP->op_first->op_next = op->op_next;
a0d0e21e 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;
a0d0e21e 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,
a0d0e21e 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));
748a9306 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
a0d0e21e 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);
a0d0e21e 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;
a0d0e21e 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;
a0d0e21e 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) ||
a0d0e21e 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 &&
a0d0e21e 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 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 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 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 918 HV *stash;
919 GV *gv;
920 CV *cv;
a0d0e21e 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 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 938 restartop = die_where(message);
939 if ((!restartop && was_in_eval) || oldrunlevel > 1)
a5f75d66 940 Siglongjmp(top_env, 3);
a0d0e21e 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 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 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 996 return pop_return();
997 }
998 }
999 fputs(message, stderr);
a5f75d66 1000 (void)Fflush(stderr);
e632a5f6 1001 if (e_fp) {
e632a5f6 1002 fclose(e_fp);
a5f75d66 1003 e_fp = Nullfp;
a0d0e21e 1004 (void)UNLINK(e_tmpname);
e632a5f6 1005 }
748a9306 1006 statusvalue = SHIFTSTATUS(statusvalue);
1007#ifdef VMS
1008 my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT);
1009#else
a0d0e21e 1010 my_exit((I32)((errno&255)?errno:((statusvalue&255)?statusvalue:255)));
748a9306 1011#endif
a0d0e21e 1012 return 0;
1013}
1014
1015PP(pp_xor)
1016{
1017 dSP; dPOPTOPssrl;
1018 if (SvTRUE(left) != SvTRUE(right))
1019 RETSETYES;
1020 else
1021 RETSETNO;
1022}
1023
1024PP(pp_andassign)
1025{
1026 dSP;
1027 if (!SvTRUE(TOPs))
1028 RETURN;
1029 else
1030 RETURNOP(cLOGOP->op_other);
1031}
1032
1033PP(pp_orassign)
1034{
1035 dSP;
1036 if (SvTRUE(TOPs))
1037 RETURN;
1038 else
1039 RETURNOP(cLOGOP->op_other);
1040}
1041
1042#ifdef DEPRECATED
1043PP(pp_entersubr)
1044{
1045 dSP;
1046 SV** mark = (stack_base + *markstack_ptr + 1);
1047 SV* cv = *mark;
1048 while (mark < sp) { /* emulate old interface */
1049 *mark = mark[1];
1050 mark++;
1051 }
1052 *sp = cv;
1053 return pp_entersub();
1054}
1055#endif
1056
1057PP(pp_caller)
1058{
1059 dSP;
1060 register I32 cxix = dopoptosub(cxstack_ix);
1061 register CONTEXT *cx;
1062 I32 dbcxix;
1063 SV *sv;
1064 I32 count = 0;
1065
1066 if (MAXARG)
1067 count = POPi;
1068 EXTEND(SP, 6);
1069 for (;;) {
1070 if (cxix < 0) {
1071 if (GIMME != G_ARRAY)
1072 RETPUSHUNDEF;
1073 RETURN;
1074 }
1075 if (DBsub && cxix >= 0 &&
1076 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1077 count++;
1078 if (!count--)
1079 break;
1080 cxix = dopoptosub(cxix - 1);
1081 }
1082 cx = &cxstack[cxix];
06a5b730 1083 if (cxstack[cxix].cx_type == CXt_SUB) {
1084 dbcxix = dopoptosub(cxix - 1);
1085 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1086 field below is defined for any cx. */
1087 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1088 cx = &cxstack[dbcxix];
1089 }
1090
a0d0e21e 1091 if (GIMME != G_ARRAY) {
1092 dTARGET;
1093
1094 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1095 PUSHs(TARG);
1096 RETURN;
1097 }
a0d0e21e 1098
1099 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1100 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1101 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1102 if (!MAXARG)
1103 RETURN;
06a5b730 1104 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
a0d0e21e 1105 sv = NEWSV(49, 0);
1106 gv_efullname(sv, CvGV(cxstack[cxix].blk_sub.cv));
1107 PUSHs(sv_2mortal(sv));
1108 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1109 }
1110 else {
1111 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1112 PUSHs(sv_2mortal(newSViv(0)));
1113 }
1114 PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
4633a7c4 1115 if (cx->cx_type == CXt_EVAL) {
06a5b730 1116 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1117 PUSHs(cx->blk_eval.cur_text);
06a5b730 1118 PUSHs(&sv_no);
1119 }
1120 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1121 /* Require, put the name. */
1122 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1123 PUSHs(&sv_yes);
1124 }
4633a7c4 1125 }
1126 else if (cx->cx_type == CXt_SUB &&
1127 cx->blk_sub.hasargs &&
1128 curcop->cop_stash == debstash)
1129 {
a0d0e21e 1130 AV *ary = cx->blk_sub.argarray;
1131 int off = AvARRAY(ary) - AvALLOC(ary);
1132
1133 if (!dbargs) {
1134 GV* tmpgv;
1135 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1136 SVt_PVAV)));
a5f75d66 1137 GvMULTI_on(tmpgv);
a0d0e21e 1138 AvREAL_off(dbargs); /* XXX Should be REIFY */
1139 }
1140
1141 if (AvMAX(dbargs) < AvFILL(ary) + off)
1142 av_extend(dbargs, AvFILL(ary) + off);
1143 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1144 AvFILL(dbargs) = AvFILL(ary) + off;
1145 }
1146 RETURN;
1147}
1148
1149static int
1150sortcv(a, b)
1151const void *a;
1152const void *b;
1153{
1154 SV **str1 = (SV **) a;
1155 SV **str2 = (SV **) b;
748a9306 1156 I32 oldsaveix = savestack_ix;
a0d0e21e 1157 I32 oldscopeix = scopestack_ix;
1158 I32 result;
1159 GvSV(firstgv) = *str1;
1160 GvSV(secondgv) = *str2;
1161 stack_sp = stack_base;
1162 op = sortcop;
1163 run();
1164 if (stack_sp != stack_base + 1)
1165 croak("Sort subroutine didn't return single value");
748a9306 1166 if (!SvNIOKp(*stack_sp))
a0d0e21e 1167 croak("Sort subroutine didn't return a numeric value");
1168 result = SvIV(*stack_sp);
1169 while (scopestack_ix > oldscopeix) {
1170 LEAVE;
1171 }
748a9306 1172 leave_scope(oldsaveix);
a0d0e21e 1173 return result;
1174}
1175
1176static int
1177sortcmp(a, b)
1178const void *a;
1179const void *b;
1180{
1181 register SV *str1 = *(SV **) a;
1182 register SV *str2 = *(SV **) b;
1183 I32 retval;
1184
4633a7c4 1185 if (!SvPOKp(str1)) {
1186 if (!SvPOKp(str2))
1187 return 0;
1188 else
1189 return -1;
1190 }
1191 if (!SvPOKp(str2))
1192 return 1;
1193
a0d0e21e 1194 if (SvCUR(str1) < SvCUR(str2)) {
1195 /*SUPPRESS 560*/
1196 if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str1)))
1197 return retval;
1198 else
1199 return -1;
1200 }
1201 /*SUPPRESS 560*/
1202 else if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str2)))
1203 return retval;
1204 else if (SvCUR(str1) == SvCUR(str2))
1205 return 0;
1206 else
1207 return 1;
1208}
1209
1210PP(pp_reset)
1211{
1212 dSP;
1213 char *tmps;
1214
1215 if (MAXARG < 1)
1216 tmps = "";
1217 else
1218 tmps = POPp;
1219 sv_reset(tmps, curcop->cop_stash);
1220 PUSHs(&sv_yes);
1221 RETURN;
1222}
1223
1224PP(pp_lineseq)
1225{
1226 return NORMAL;
1227}
1228
1229PP(pp_dbstate)
1230{
1231 curcop = (COP*)op;
1232 TAINT_NOT; /* Each statement is presumed innocent */
1233 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1234 FREETMPS;
1235
1236 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1237 {
1238 SV **sp;
1239 register CV *cv;
1240 register CONTEXT *cx;
748a9306 1241 I32 gimme = G_ARRAY;
a0d0e21e 1242 I32 hasargs;
1243 GV *gv;
1244
a0d0e21e 1245 gv = DBgv;
1246 cv = GvCV(gv);
a0d0e21e 1247 if (!cv)
1248 DIE("No DB::DB routine defined");
1249
06a5b730 1250 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1251 return NORMAL;
748a9306 1252
4633a7c4 1253 ENTER;
1254 SAVETMPS;
1255
748a9306 1256 SAVEI32(debug);
1257 SAVESPTR(stack_sp);
1258 debug = 0;
1259 hasargs = 0;
1260 sp = stack_sp;
1261
a0d0e21e 1262 push_return(op->op_next);
748a9306 1263 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e 1264 PUSHSUB(cx);
1265 CvDEPTH(cv)++;
1266 (void)SvREFCNT_inc(cv);
1267 SAVESPTR(curpad);
1268 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1269 RETURNOP(CvSTART(cv));
1270 }
1271 else
1272 return NORMAL;
1273}
1274
1275PP(pp_scope)
1276{
1277 return NORMAL;
1278}
1279
1280PP(pp_enteriter)
1281{
1282 dSP; dMARK;
1283 register CONTEXT *cx;
1284 I32 gimme = GIMME;
1285 SV **svp;
1286
4633a7c4 1287 ENTER;
1288 SAVETMPS;
1289
a0d0e21e 1290 if (op->op_targ)
1291 svp = &curpad[op->op_targ]; /* "my" variable */
1292 else
1293 svp = &GvSV((GV*)POPs); /* symbol table variable */
1294
4633a7c4 1295 SAVESPTR(*svp);
1296
a0d0e21e 1297 ENTER;
1298
1299 PUSHBLOCK(cx, CXt_LOOP, SP);
1300 PUSHLOOP(cx, svp, MARK);
4633a7c4 1301 if (op->op_flags & OPf_STACKED) {
1302 AV* av = (AV*)POPs;
1303 cx->blk_loop.iterary = av;
1304 cx->blk_loop.iterix = -1;
1305 }
1306 else {
1307 cx->blk_loop.iterary = stack;
1308 AvFILL(stack) = sp - stack_base;
1309 cx->blk_loop.iterix = MARK - stack_base;
1310 }
a0d0e21e 1311
1312 RETURN;
1313}
1314
1315PP(pp_enterloop)
1316{
1317 dSP;
1318 register CONTEXT *cx;
1319 I32 gimme = GIMME;
1320
1321 ENTER;
1322 SAVETMPS;
1323 ENTER;
1324
1325 PUSHBLOCK(cx, CXt_LOOP, SP);
1326 PUSHLOOP(cx, 0, SP);
1327
1328 RETURN;
1329}
1330
1331PP(pp_leaveloop)
1332{
1333 dSP;
1334 register CONTEXT *cx;
1335 I32 gimme;
1336 SV **newsp;
1337 PMOP *newpm;
1338 SV **mark;
1339
1340 POPBLOCK(cx,newpm);
1341 mark = newsp;
1342 POPLOOP(cx);
1343 if (gimme == G_SCALAR) {
1344 if (op->op_private & OPpLEAVE_VOID)
1345 ;
1346 else {
1347 if (mark < SP)
1348 *++newsp = sv_mortalcopy(*SP);
1349 else
1350 *++newsp = &sv_undef;
1351 }
1352 }
1353 else {
1354 while (mark < SP)
1355 *++newsp = sv_mortalcopy(*++mark);
1356 }
1357 curpm = newpm; /* Don't pop $1 et al till now */
1358 sp = newsp;
1359 LEAVE;
1360 LEAVE;
1361
1362 RETURN;
1363}
1364
1365PP(pp_return)
1366{
1367 dSP; dMARK;
1368 I32 cxix;
1369 register CONTEXT *cx;
1370 I32 gimme;
1371 SV **newsp;
1372 PMOP *newpm;
1373 I32 optype = 0;
1374
1375 if (stack == sortstack) {
1376 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9 1377 if (cxstack_ix > sortcxix)
1378 dounwind(sortcxix);
a0d0e21e 1379 AvARRAY(stack)[1] = *SP;
1380 stack_sp = stack_base + 1;
1381 return 0;
1382 }
1383 }
1384
1385 cxix = dopoptosub(cxstack_ix);
1386 if (cxix < 0)
1387 DIE("Can't return outside a subroutine");
1388 if (cxix < cxstack_ix)
1389 dounwind(cxix);
1390
1391 POPBLOCK(cx,newpm);
1392 switch (cx->cx_type) {
1393 case CXt_SUB:
1394 POPSUB(cx);
1395 break;
1396 case CXt_EVAL:
1397 POPEVAL(cx);
748a9306 1398 if (optype == OP_REQUIRE &&
1399 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1400 {
1401 char *name = cx->blk_eval.old_name;
1402 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1403 DIE("%s did not return a true value", name);
1404 }
a0d0e21e 1405 break;
1406 default:
1407 DIE("panic: return");
1408 break;
1409 }
1410
1411 if (gimme == G_SCALAR) {
1412 if (MARK < SP)
1413 *++newsp = sv_mortalcopy(*SP);
1414 else
1415 *++newsp = &sv_undef;
a0d0e21e 1416 }
1417 else {
a0d0e21e 1418 while (MARK < SP)
1419 *++newsp = sv_mortalcopy(*++MARK);
1420 }
1421 curpm = newpm; /* Don't pop $1 et al till now */
1422 stack_sp = newsp;
1423
1424 LEAVE;
1425 return pop_return();
1426}
1427
1428PP(pp_last)
1429{
1430 dSP;
1431 I32 cxix;
1432 register CONTEXT *cx;
1433 I32 gimme;
1434 I32 optype;
1435 OP *nextop;
1436 SV **newsp;
1437 PMOP *newpm;
1438 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 1439
1440 if (op->op_flags & OPf_SPECIAL) {
1441 cxix = dopoptoloop(cxstack_ix);
1442 if (cxix < 0)
1443 DIE("Can't \"last\" outside a block");
1444 }
1445 else {
1446 cxix = dopoptolabel(cPVOP->op_pv);
1447 if (cxix < 0)
1448 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1449 }
1450 if (cxix < cxstack_ix)
1451 dounwind(cxix);
1452
1453 POPBLOCK(cx,newpm);
1454 switch (cx->cx_type) {
1455 case CXt_LOOP:
1456 POPLOOP(cx);
1457 nextop = cx->blk_loop.last_op->op_next;
1458 LEAVE;
1459 break;
1460 case CXt_EVAL:
1461 POPEVAL(cx);
1462 nextop = pop_return();
1463 break;
1464 case CXt_SUB:
1465 POPSUB(cx);
1466 nextop = pop_return();
1467 break;
1468 default:
1469 DIE("panic: last");
1470 break;
1471 }
1472
1473 if (gimme == G_SCALAR) {
1474 if (mark < SP)
1475 *++newsp = sv_mortalcopy(*SP);
1476 else
1477 *++newsp = &sv_undef;
1478 }
1479 else {
1480 while (mark < SP)
1481 *++newsp = sv_mortalcopy(*++mark);
1482 }
1483 curpm = newpm; /* Don't pop $1 et al till now */
1484 sp = newsp;
1485
1486 LEAVE;
1487 RETURNOP(nextop);
1488}
1489
1490PP(pp_next)
1491{
1492 I32 cxix;
1493 register CONTEXT *cx;
1494 I32 oldsave;
1495
1496 if (op->op_flags & OPf_SPECIAL) {
1497 cxix = dopoptoloop(cxstack_ix);
1498 if (cxix < 0)
1499 DIE("Can't \"next\" outside a block");
1500 }
1501 else {
1502 cxix = dopoptolabel(cPVOP->op_pv);
1503 if (cxix < 0)
1504 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1505 }
1506 if (cxix < cxstack_ix)
1507 dounwind(cxix);
1508
1509 TOPBLOCK(cx);
1510 oldsave = scopestack[scopestack_ix - 1];
1511 LEAVE_SCOPE(oldsave);
1512 return cx->blk_loop.next_op;
1513}
1514
1515PP(pp_redo)
1516{
1517 I32 cxix;
1518 register CONTEXT *cx;
1519 I32 oldsave;
1520
1521 if (op->op_flags & OPf_SPECIAL) {
1522 cxix = dopoptoloop(cxstack_ix);
1523 if (cxix < 0)
1524 DIE("Can't \"redo\" outside a block");
1525 }
1526 else {
1527 cxix = dopoptolabel(cPVOP->op_pv);
1528 if (cxix < 0)
1529 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1530 }
1531 if (cxix < cxstack_ix)
1532 dounwind(cxix);
1533
1534 TOPBLOCK(cx);
1535 oldsave = scopestack[scopestack_ix - 1];
1536 LEAVE_SCOPE(oldsave);
1537 return cx->blk_loop.redo_op;
1538}
1539
1540static OP* lastgotoprobe;
1541
1542static OP *
1543dofindlabel(op,label,opstack)
1544OP *op;
1545char *label;
1546OP **opstack;
1547{
1548 OP *kid;
1549 OP **ops = opstack;
1550
1551 if (op->op_type == OP_LEAVE ||
1552 op->op_type == OP_SCOPE ||
1553 op->op_type == OP_LEAVELOOP ||
1554 op->op_type == OP_LEAVETRY)
1555 *ops++ = cUNOP->op_first;
1556 *ops = 0;
1557 if (op->op_flags & OPf_KIDS) {
1558 /* First try all the kids at this level, since that's likeliest. */
1559 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1560 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1561 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1562 return kid;
1563 }
1564 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1565 if (kid == lastgotoprobe)
1566 continue;
1567 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1568 if (ops > opstack &&
1569 (ops[-1]->op_type == OP_NEXTSTATE ||
1570 ops[-1]->op_type == OP_DBSTATE))
1571 *ops = kid;
1572 else
1573 *ops++ = kid;
1574 }
1575 if (op = dofindlabel(kid,label,ops))
1576 return op;
1577 }
1578 }
1579 *ops = 0;
1580 return 0;
1581}
1582
1583PP(pp_dump)
1584{
1585 return pp_goto(ARGS);
1586 /*NOTREACHED*/
1587}
1588
1589PP(pp_goto)
1590{
1591 dSP;
1592 OP *retop = 0;
1593 I32 ix;
1594 register CONTEXT *cx;
1595 OP *enterops[64];
1596 char *label;
1597 int do_dump = (op->op_type == OP_DUMP);
1598
1599 label = 0;
1600 if (op->op_flags & OPf_STACKED) {
1601 SV *sv = POPs;
1602
1603 /* This egregious kludge implements goto &subroutine */
1604 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1605 I32 cxix;
1606 register CONTEXT *cx;
1607 CV* cv = (CV*)SvRV(sv);
1608 SV** mark;
1609 I32 items = 0;
1610 I32 oldsave;
1611
4aa0a1f7 1612 if (!CvROOT(cv) && !CvXSUB(cv)) {
1613 if (CvGV(cv)) {
1614 SV *tmpstr = sv_newmortal();
1615 gv_efullname(tmpstr, CvGV(cv));
1616 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1617 }
1618 DIE("Goto undefined subroutine");
1619 }
1620
a0d0e21e 1621 /* First do some returnish stuff. */
1622 cxix = dopoptosub(cxstack_ix);
1623 if (cxix < 0)
1624 DIE("Can't goto subroutine outside a subroutine");
1625 if (cxix < cxstack_ix)
1626 dounwind(cxix);
1627 TOPBLOCK(cx);
1628 mark = stack_sp;
1629 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1630 AV* av = cx->blk_sub.argarray;
1631
1632 items = AvFILL(av) + 1;
1633 Copy(AvARRAY(av), ++stack_sp, items, SV*);
1634 stack_sp += items;
1635 GvAV(defgv) = cx->blk_sub.savearray;
a0d0e21e 1636 AvREAL_off(av);
4633a7c4 1637 av_clear(av);
a0d0e21e 1638 }
1639 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1640 SvREFCNT_dec(cx->blk_sub.cv);
1641 oldsave = scopestack[scopestack_ix - 1];
1642 LEAVE_SCOPE(oldsave);
1643
1644 /* Now do some callish stuff. */
1645 SAVETMPS;
1646 if (CvXSUB(cv)) {
1647 if (CvOLDSTYLE(cv)) {
ecfc5424 1648 I32 (*fp3)_((int,int,int));
a0d0e21e 1649 while (sp > mark) {
1650 sp[1] = sp[0];
1651 sp--;
1652 }
ecfc5424 1653 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1654 items = (*fp3)(CvXSUBANY(cv).any_i32,
1655 mark - stack_base + 1,
1656 items);
a0d0e21e 1657 sp = stack_base + items;
1658 }
1659 else {
1660 (void)(*CvXSUB(cv))(cv);
1661 }
1662 LEAVE;
1663 return pop_return();
1664 }
1665 else {
1666 AV* padlist = CvPADLIST(cv);
1667 SV** svp = AvARRAY(padlist);
1668 cx->blk_sub.cv = cv;
1669 cx->blk_sub.olddepth = CvDEPTH(cv);
1670 CvDEPTH(cv)++;
1671 if (CvDEPTH(cv) < 2)
1672 (void)SvREFCNT_inc(cv);
1673 else { /* save temporaries on recursion? */
1674 if (CvDEPTH(cv) == 100 && dowarn)
1675 warn("Deep recursion on subroutine \"%s\"",
1676 GvENAME(CvGV(cv)));
1677 if (CvDEPTH(cv) > AvFILL(padlist)) {
1678 AV *newpad = newAV();
4aa0a1f7 1679 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e 1680 I32 ix = AvFILL((AV*)svp[1]);
1681 svp = AvARRAY(svp[0]);
748a9306 1682 for ( ;ix > 0; ix--) {
a0d0e21e 1683 if (svp[ix] != &sv_undef) {
748a9306 1684 char *name = SvPVX(svp[ix]);
1685 if (SvFLAGS(svp[ix]) & SVf_FAKE) {
1686 /* outer lexical? */
1687 av_store(newpad, ix,
4aa0a1f7 1688 SvREFCNT_inc(oldpad[ix]) );
748a9306 1689 }
1690 else { /* our own lexical */
1691 if (*name == '@')
1692 av_store(newpad, ix, sv = (SV*)newAV());
1693 else if (*name == '%')
1694 av_store(newpad, ix, sv = (SV*)newHV());
1695 else
1696 av_store(newpad, ix, sv = NEWSV(0,0));
1697 SvPADMY_on(sv);
1698 }
a0d0e21e 1699 }
1700 else {
748a9306 1701 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e 1702 SvPADTMP_on(sv);
1703 }
1704 }
1705 if (cx->blk_sub.hasargs) {
1706 AV* av = newAV();
1707 av_extend(av, 0);
1708 av_store(newpad, 0, (SV*)av);
1709 AvFLAGS(av) = AVf_REIFY;
1710 }
1711 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1712 AvFILL(padlist) = CvDEPTH(cv);
1713 svp = AvARRAY(padlist);
1714 }
1715 }
1716 SAVESPTR(curpad);
1717 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1718 if (cx->blk_sub.hasargs) {
1719 AV* av = (AV*)curpad[0];
1720 SV** ary;
1721
1722 cx->blk_sub.savearray = GvAV(defgv);
1723 cx->blk_sub.argarray = av;
1724 GvAV(defgv) = cx->blk_sub.argarray;
1725 ++mark;
1726
1727 if (items >= AvMAX(av) + 1) {
1728 ary = AvALLOC(av);
1729 if (AvARRAY(av) != ary) {
1730 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1731 SvPVX(av) = (char*)ary;
1732 }
1733 if (items >= AvMAX(av) + 1) {
1734 AvMAX(av) = items - 1;
1735 Renew(ary,items+1,SV*);
1736 AvALLOC(av) = ary;
1737 SvPVX(av) = (char*)ary;
1738 }
1739 }
1740 Copy(mark,AvARRAY(av),items,SV*);
1741 AvFILL(av) = items - 1;
1742
1743 while (items--) {
1744 if (*mark)
1745 SvTEMP_off(*mark);
1746 mark++;
1747 }
1748 }
1749 RETURNOP(CvSTART(cv));
1750 }
1751 }
1752 else
1753 label = SvPV(sv,na);
1754 }
1755 else if (op->op_flags & OPf_SPECIAL) {
1756 if (! do_dump)
1757 DIE("goto must have label");
1758 }
1759 else
1760 label = cPVOP->op_pv;
1761
1762 if (label && *label) {
1763 OP *gotoprobe = 0;
1764
1765 /* find label */
1766
1767 lastgotoprobe = 0;
1768 *enterops = 0;
1769 for (ix = cxstack_ix; ix >= 0; ix--) {
1770 cx = &cxstack[ix];
1771 switch (cx->cx_type) {
1772 case CXt_SUB:
1773 gotoprobe = CvROOT(cx->blk_sub.cv);
1774 break;
1775 case CXt_EVAL:
1776 gotoprobe = eval_root; /* XXX not good for nested eval */
1777 break;
1778 case CXt_LOOP:
1779 gotoprobe = cx->blk_oldcop->op_sibling;
1780 break;
1781 case CXt_SUBST:
1782 continue;
1783 case CXt_BLOCK:
1784 if (ix)
1785 gotoprobe = cx->blk_oldcop->op_sibling;
1786 else
1787 gotoprobe = main_root;
1788 break;
1789 default:
1790 if (ix)
1791 DIE("panic: goto");
1792 else
1793 gotoprobe = main_root;
1794 break;
1795 }
1796 retop = dofindlabel(gotoprobe, label, enterops);
1797 if (retop)
1798 break;
1799 lastgotoprobe = gotoprobe;
1800 }
1801 if (!retop)
1802 DIE("Can't find label %s", label);
1803
1804 /* pop unwanted frames */
1805
1806 if (ix < cxstack_ix) {
1807 I32 oldsave;
1808
1809 if (ix < 0)
1810 ix = 0;
1811 dounwind(ix);
1812 TOPBLOCK(cx);
1813 oldsave = scopestack[scopestack_ix];
1814 LEAVE_SCOPE(oldsave);
1815 }
1816
1817 /* push wanted frames */
1818
748a9306 1819 if (*enterops && enterops[1]) {
a0d0e21e 1820 OP *oldop = op;
748a9306 1821 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e 1822 op = enterops[ix];
1823 (*op->op_ppaddr)();
1824 }
1825 op = oldop;
1826 }
1827 }
1828
1829 if (do_dump) {
a5f75d66 1830#ifdef VMS
1831 if (!retop) retop = main_start;
1832#endif
a0d0e21e 1833 restartop = retop;
1834 do_undump = TRUE;
1835
1836 my_unexec();
1837
1838 restartop = 0; /* hmm, must be GNU unexec().. */
1839 do_undump = FALSE;
1840 }
1841
748a9306 1842 if (stack == signalstack) {
1843 restartop = retop;
a5f75d66 1844 Siglongjmp(top_env, 3);
748a9306 1845 }
1846
a0d0e21e 1847 RETURNOP(retop);
1848}
1849
1850PP(pp_exit)
1851{
1852 dSP;
1853 I32 anum;
1854
1855 if (MAXARG < 1)
1856 anum = 0;
1857 else
1858 anum = SvIVx(POPs);
1859 my_exit(anum);
1860 PUSHs(&sv_undef);
1861 RETURN;
1862}
1863
1864#ifdef NOTYET
1865PP(pp_nswitch)
1866{
1867 dSP;
1868 double value = SvNVx(GvSV(cCOP->cop_gv));
1869 register I32 match = I_32(value);
1870
1871 if (value < 0.0) {
1872 if (((double)match) > value)
1873 --match; /* was fractional--truncate other way */
1874 }
1875 match -= cCOP->uop.scop.scop_offset;
1876 if (match < 0)
1877 match = 0;
1878 else if (match > cCOP->uop.scop.scop_max)
1879 match = cCOP->uop.scop.scop_max;
1880 op = cCOP->uop.scop.scop_next[match];
1881 RETURNOP(op);
1882}
1883
1884PP(pp_cswitch)
1885{
1886 dSP;
1887 register I32 match;
1888
1889 if (multiline)
1890 op = op->op_next; /* can't assume anything */
1891 else {
1892 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1893 match -= cCOP->uop.scop.scop_offset;
1894 if (match < 0)
1895 match = 0;
1896 else if (match > cCOP->uop.scop.scop_max)
1897 match = cCOP->uop.scop.scop_max;
1898 op = cCOP->uop.scop.scop_next[match];
1899 }
1900 RETURNOP(op);
1901}
1902#endif
1903
1904/* Eval. */
1905
1906static void
1907save_lines(array, sv)
1908AV *array;
1909SV *sv;
1910{
1911 register char *s = SvPVX(sv);
1912 register char *send = SvPVX(sv) + SvCUR(sv);
1913 register char *t;
1914 register I32 line = 1;
1915
1916 while (s && s < send) {
1917 SV *tmpstr = NEWSV(85,0);
1918
1919 sv_upgrade(tmpstr, SVt_PVMG);
1920 t = strchr(s, '\n');
1921 if (t)
1922 t++;
1923 else
1924 t = send;
1925
1926 sv_setpvn(tmpstr, s, t - s);
1927 av_store(array, line++, tmpstr);
1928 s = t;
1929 }
1930}
1931
1932static OP *
1933doeval(gimme)
1934int gimme;
1935{
1936 dSP;
1937 OP *saveop = op;
1938 HV *newstash;
748a9306 1939 AV* comppadlist;
a0d0e21e 1940
1941 in_eval = 1;
1942
1943 /* set up a scratch pad */
1944
1945 SAVEINT(padix);
1946 SAVESPTR(curpad);
1947 SAVESPTR(comppad);
1948 SAVESPTR(comppad_name);
1949 SAVEINT(comppad_name_fill);
1950 SAVEINT(min_intro_pending);
1951 SAVEINT(max_intro_pending);
748a9306 1952
1953 SAVESPTR(compcv);
1954 compcv = (CV*)NEWSV(1104,0);
1955 sv_upgrade((SV *)compcv, SVt_PVCV);
1956
a0d0e21e 1957 comppad = newAV();
1958 comppad_name = newAV();
1959 comppad_name_fill = 0;
1960 min_intro_pending = 0;
1961 av_push(comppad, Nullsv);
1962 curpad = AvARRAY(comppad);
1963 padix = 0;
1964
748a9306 1965 comppadlist = newAV();
1966 AvREAL_off(comppadlist);
8e07c86e 1967 av_store(comppadlist, 0, (SV*)comppad_name);
1968 av_store(comppadlist, 1, (SV*)comppad);
748a9306 1969 CvPADLIST(compcv) = comppadlist;
8e07c86e 1970 SAVEFREESV(compcv);
748a9306 1971
a0d0e21e 1972 /* make sure we compile in the right package */
1973
1974 newstash = curcop->cop_stash;
1975 if (curstash != newstash) {
1976 SAVESPTR(curstash);
1977 curstash = newstash;
1978 }
1979 SAVESPTR(beginav);
1980 beginav = newAV();
1981 SAVEFREESV(beginav);
1982
1983 /* try to compile it */
1984
1985 eval_root = Nullop;
1986 error_count = 0;
1987 curcop = &compiling;
1988 curcop->cop_arybase = 0;
c07a80fd 1989 SvREFCNT_dec(rs);
1990 rs = newSVpv("\n", 1);
4633a7c4 1991 sv_setpv(GvSV(errgv),"");
a0d0e21e 1992 if (yyparse() || error_count || !eval_root) {
1993 SV **newsp;
1994 I32 gimme;
1995 CONTEXT *cx;
1996 I32 optype;
1997
1998 op = saveop;
1999 if (eval_root) {
2000 op_free(eval_root);
2001 eval_root = Nullop;
2002 }
2003 POPBLOCK(cx,curpm);
2004 POPEVAL(cx);
2005 pop_return();
2006 lex_end();
2007 LEAVE;
2008 if (optype == OP_REQUIRE)
4633a7c4 2009 DIE("%s", SvPVx(GvSV(errgv), na));
c07a80fd 2010 SvREFCNT_dec(rs);
2011 rs = SvREFCNT_inc(nrs);
a0d0e21e 2012 RETPUSHUNDEF;
2013 }
c07a80fd 2014 SvREFCNT_dec(rs);
2015 rs = SvREFCNT_inc(nrs);
a0d0e21e 2016 compiling.cop_line = 0;
a0d0e21e 2017 SAVEFREEOP(eval_root);
2018 if (gimme & G_ARRAY)
2019 list(eval_root);
2020 else
2021 scalar(eval_root);
2022
2023 DEBUG_x(dump_eval());
2024
2025 /* compiled okay, so do it */
2026
2027 RETURNOP(eval_start);
2028}
2029
2030PP(pp_require)
2031{
2032 dSP;
2033 register CONTEXT *cx;
2034 SV *sv;
2035 char *name;
2036 char *tmpname;
2037 SV** svp;
2038 I32 gimme = G_SCALAR;
2039 FILE *tryrsfp = 0;
2040
2041 sv = POPs;
4633a7c4 2042 if (SvNIOKp(sv) && !SvPOKp(sv)) {
a5f75d66 2043 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2044 DIE("Perl %s required--this is only version %s, stopped",
2045 SvPV(sv,na),patchlevel);
a0d0e21e 2046 RETPUSHYES;
2047 }
2048 name = SvPV(sv, na);
2049 if (!*name)
2050 DIE("Null filename used");
4633a7c4 2051 TAINT_PROPER("require");
a0d0e21e 2052 if (op->op_type == OP_REQUIRE &&
2053 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2054 *svp != &sv_undef)
2055 RETPUSHYES;
2056
2057 /* prepare to compile file */
2058
2059 tmpname = savepv(name);
2060 if (*tmpname == '/' ||
2061 (*tmpname == '.' &&
2062 (tmpname[1] == '/' ||
748a9306 2063 (tmpname[1] == '.' && tmpname[2] == '/')))
4633a7c4 2064#ifdef DOSISH
2065 || (tmpname[0] && tmpname[1] == ':')
2066#endif
748a9306 2067#ifdef VMS
4633a7c4 2068 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2069 (tmpname[1] == '-' || tmpname[1] == ']' || tmpname[1] == '>')))
748a9306 2070#endif
2071 )
a0d0e21e 2072 {
2073 tryrsfp = fopen(tmpname,"r");
2074 }
2075 else {
2076 AV *ar = GvAVn(incgv);
2077 I32 i;
2078
2079 for (i = 0; i <= AvFILL(ar); i++) {
748a9306 2080#ifdef VMS
2081 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
4633a7c4 2082 continue;
2083 strcat(buf,name);
748a9306 2084#else
a0d0e21e 2085 (void)sprintf(buf, "%s/%s",
2086 SvPVx(*av_fetch(ar, i, TRUE), na), name);
748a9306 2087#endif
a0d0e21e 2088 tryrsfp = fopen(buf, "r");
2089 if (tryrsfp) {
2090 char *s = buf;
2091
2092 if (*s == '.' && s[1] == '/')
2093 s += 2;
2094 Safefree(tmpname);
2095 tmpname = savepv(s);
2096 break;
2097 }
2098 }
2099 }
2100 SAVESPTR(compiling.cop_filegv);
2101 compiling.cop_filegv = gv_fetchfile(tmpname);
2102 Safefree(tmpname);
2103 tmpname = Nullch;
2104 if (!tryrsfp) {
2105 if (op->op_type == OP_REQUIRE) {
2106 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2107 if (instr(tokenbuf,".h "))
2108 strcat(tokenbuf," (change .h to .ph maybe?)");
2109 if (instr(tokenbuf,".ph "))
2110 strcat(tokenbuf," (did you run h2ph?)");
2111 DIE("%s",tokenbuf);
2112 }
2113
2114 RETPUSHUNDEF;
2115 }
2116
2117 /* Assume success here to prevent recursive requirement. */
2118 (void)hv_store(GvHVn(incgv), name, strlen(name),
2119 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2120
2121 ENTER;
2122 SAVETMPS;
2123 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73 2124 if (rsfp_filters){
2125 save_aptr(&rsfp_filters);
2126 rsfp_filters = NULL;
2127 }
2128
a0d0e21e 2129 rsfp = tryrsfp;
2130 name = savepv(name);
2131 SAVEFREEPV(name);
2132 SAVEI32(hints);
2133 hints = 0;
2134
2135 /* switch to eval mode */
2136
2137 push_return(op->op_next);
2138 PUSHBLOCK(cx, CXt_EVAL, SP);
2139 PUSHEVAL(cx, name, compiling.cop_filegv);
2140
2141 compiling.cop_line = 0;
2142
2143 PUTBACK;
2144 return doeval(G_SCALAR);
2145}
2146
2147PP(pp_dofile)
2148{
2149 return pp_require(ARGS);
2150}
2151
2152PP(pp_entereval)
2153{
2154 dSP;
2155 register CONTEXT *cx;
2156 dPOPss;
2157 I32 gimme = GIMME;
2158 char tmpbuf[32];
2159 STRLEN len;
2160
2161 if (!SvPV(sv,len) || !len)
2162 RETPUSHUNDEF;
748a9306 2163 TAINT_PROPER("eval");
a0d0e21e 2164
2165 ENTER;
a0d0e21e 2166 lex_start(sv);
748a9306 2167 SAVETMPS;
a0d0e21e 2168
2169 /* switch to eval mode */
2170
748a9306 2171 SAVESPTR(compiling.cop_filegv);
a0d0e21e 2172 sprintf(tmpbuf, "_<(eval %d)", ++evalseq);
2173 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2174 compiling.cop_line = 1;
2175 SAVEDELETE(defstash, savepv(tmpbuf), strlen(tmpbuf));
2176 SAVEI32(hints);
2177 hints = op->op_targ;
2178
2179 push_return(op->op_next);
2180 PUSHBLOCK(cx, CXt_EVAL, SP);
2181 PUSHEVAL(cx, 0, compiling.cop_filegv);
2182
2183 /* prepare to compile string */
2184
2185 if (perldb && curstash != debstash)
2186 save_lines(GvAV(compiling.cop_filegv), linestr);
2187 PUTBACK;
2188 return doeval(gimme);
2189}
2190
2191PP(pp_leaveeval)
2192{
2193 dSP;
2194 register SV **mark;
2195 SV **newsp;
2196 PMOP *newpm;
2197 I32 gimme;
2198 register CONTEXT *cx;
2199 OP *retop;
2200 I32 optype;
2201
2202 POPBLOCK(cx,newpm);
2203 POPEVAL(cx);
2204 retop = pop_return();
2205
2206 if (gimme == G_SCALAR) {
2207 if (op->op_private & OPpLEAVE_VOID)
2208 MARK = newsp;
2209 else {
2210 MARK = newsp + 1;
2211 if (MARK <= SP) {
2212 if (SvFLAGS(TOPs) & SVs_TEMP)
2213 *MARK = TOPs;
2214 else
2215 *MARK = sv_mortalcopy(TOPs);
2216 }
2217 else {
2218 MEXTEND(mark,0);
2219 *MARK = &sv_undef;
2220 }
2221 }
2222 SP = MARK;
2223 }
2224 else {
2225 for (mark = newsp + 1; mark <= SP; mark++)
2226 if (!(SvFLAGS(TOPs) & SVs_TEMP))
2227 *mark = sv_mortalcopy(*mark);
2228 /* in case LEAVE wipes old return values */
2229 }
2230 curpm = newpm; /* Don't pop $1 et al till now */
2231
2232 if (optype != OP_ENTEREVAL) {
2233 char *name = cx->blk_eval.old_name;
2234
2235 if (!(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
2236 /* Unassume the success we assumed earlier. */
748a9306 2237 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
a0d0e21e 2238
2239 if (optype == OP_REQUIRE)
2240 retop = die("%s did not return a true value", name);
2241 }
2242 }
2243
2244 lex_end();
2245 LEAVE;
4633a7c4 2246 sv_setpv(GvSV(errgv),"");
a0d0e21e 2247
2248 RETURNOP(retop);
2249}
2250
a0d0e21e 2251PP(pp_entertry)
2252{
2253 dSP;
2254 register CONTEXT *cx;
2255 I32 gimme = GIMME;
2256
2257 ENTER;
2258 SAVETMPS;
2259
2260 push_return(cLOGOP->op_other->op_next);
2261 PUSHBLOCK(cx, CXt_EVAL, SP);
2262 PUSHEVAL(cx, 0, 0);
2263 eval_root = op; /* Only needed so that goto works right. */
2264
2265 in_eval = 1;
4633a7c4 2266 sv_setpv(GvSV(errgv),"");
a0d0e21e 2267 RETURN;
2268}
2269
2270PP(pp_leavetry)
2271{
2272 dSP;
2273 register SV **mark;
2274 SV **newsp;
2275 PMOP *newpm;
2276 I32 gimme;
2277 register CONTEXT *cx;
2278 I32 optype;
2279
2280 POPBLOCK(cx,newpm);
2281 POPEVAL(cx);
2282 pop_return();
2283
2284 if (gimme == G_SCALAR) {
2285 if (op->op_private & OPpLEAVE_VOID)
2286 MARK = newsp;
2287 else {
2288 MARK = newsp + 1;
2289 if (MARK <= SP) {
2290 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2291 *MARK = TOPs;
2292 else
2293 *MARK = sv_mortalcopy(TOPs);
2294 }
2295 else {
2296 MEXTEND(mark,0);
2297 *MARK = &sv_undef;
2298 }
2299 }
2300 SP = MARK;
2301 }
2302 else {
2303 for (mark = newsp + 1; mark <= SP; mark++)
2304 if (!(SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)))
2305 *mark = sv_mortalcopy(*mark);
2306 /* in case LEAVE wipes old return values */
2307 }
2308 curpm = newpm; /* Don't pop $1 et al till now */
2309
2310 LEAVE;
4633a7c4 2311 sv_setpv(GvSV(errgv),"");
a0d0e21e 2312 RETURN;
2313}
2314
2315static void
2316doparseform(sv)
2317SV *sv;
2318{
2319 STRLEN len;
2320 register char *s = SvPV_force(sv, len);
2321 register char *send = s + len;
2322 register char *base;
2323 register I32 skipspaces = 0;
2324 bool noblank;
2325 bool repeat;
2326 bool postspace = FALSE;
2327 U16 *fops;
2328 register U16 *fpc;
2329 U16 *linepc;
2330 register I32 arg;
2331 bool ischop;
2332
2333 New(804, fops, (send - s)*3+2, U16); /* Almost certainly too long... */
2334 fpc = fops;
2335
2336 if (s < send) {
2337 linepc = fpc;
2338 *fpc++ = FF_LINEMARK;
2339 noblank = repeat = FALSE;
2340 base = s;
2341 }
2342
2343 while (s <= send) {
2344 switch (*s++) {
2345 default:
2346 skipspaces = 0;
2347 continue;
2348
2349 case '~':
2350 if (*s == '~') {
2351 repeat = TRUE;
2352 *s = ' ';
2353 }
2354 noblank = TRUE;
2355 s[-1] = ' ';
2356 /* FALL THROUGH */
2357 case ' ': case '\t':
2358 skipspaces++;
2359 continue;
2360
2361 case '\n': case 0:
2362 arg = s - base;
2363 skipspaces++;
2364 arg -= skipspaces;
2365 if (arg) {
2366 if (postspace) {
2367 *fpc++ = FF_SPACE;
2368 postspace = FALSE;
2369 }
2370 *fpc++ = FF_LITERAL;
2371 *fpc++ = arg;
2372 }
2373 if (s <= send)
2374 skipspaces--;
2375 if (skipspaces) {
2376 *fpc++ = FF_SKIP;
2377 *fpc++ = skipspaces;
2378 }
2379 skipspaces = 0;
2380 if (s <= send)
2381 *fpc++ = FF_NEWLINE;
2382 if (noblank) {
2383 *fpc++ = FF_BLANK;
2384 if (repeat)
2385 arg = fpc - linepc + 1;
2386 else
2387 arg = 0;
2388 *fpc++ = arg;
2389 }
2390 if (s < send) {
2391 linepc = fpc;
2392 *fpc++ = FF_LINEMARK;
2393 noblank = repeat = FALSE;
2394 base = s;
2395 }
2396 else
2397 s++;
2398 continue;
2399
2400 case '@':
2401 case '^':
2402 ischop = s[-1] == '^';
2403
2404 if (postspace) {
2405 *fpc++ = FF_SPACE;
2406 postspace = FALSE;
2407 }
2408 arg = (s - base) - 1;
2409 if (arg) {
2410 *fpc++ = FF_LITERAL;
2411 *fpc++ = arg;
2412 }
2413
2414 base = s - 1;
2415 *fpc++ = FF_FETCH;
2416 if (*s == '*') {
2417 s++;
2418 *fpc++ = 0;
2419 *fpc++ = FF_LINEGLOB;
2420 }
2421 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2422 arg = ischop ? 512 : 0;
2423 base = s - 1;
2424 while (*s == '#')
2425 s++;
2426 if (*s == '.') {
2427 char *f;
2428 s++;
2429 f = s;
2430 while (*s == '#')
2431 s++;
2432 arg |= 256 + (s - f);
2433 }
2434 *fpc++ = s - base; /* fieldsize for FETCH */
2435 *fpc++ = FF_DECIMAL;
2436 *fpc++ = arg;
2437 }
2438 else {
2439 I32 prespace = 0;
2440 bool ismore = FALSE;
2441
2442 if (*s == '>') {
2443 while (*++s == '>') ;
2444 prespace = FF_SPACE;
2445 }
2446 else if (*s == '|') {
2447 while (*++s == '|') ;
2448 prespace = FF_HALFSPACE;
2449 postspace = TRUE;
2450 }
2451 else {
2452 if (*s == '<')
2453 while (*++s == '<') ;
2454 postspace = TRUE;
2455 }
2456 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2457 s += 3;
2458 ismore = TRUE;
2459 }
2460 *fpc++ = s - base; /* fieldsize for FETCH */
2461
2462 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2463
2464 if (prespace)
2465 *fpc++ = prespace;
2466 *fpc++ = FF_ITEM;
2467 if (ismore)
2468 *fpc++ = FF_MORE;
2469 if (ischop)
2470 *fpc++ = FF_CHOP;
2471 }
2472 base = s;
2473 skipspaces = 0;
2474 continue;
2475 }
2476 }
2477 *fpc++ = FF_END;
2478
2479 arg = fpc - fops;
2480 { /* need to jump to the next word */
2481 int z;
2482 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2483 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2484 s = SvPVX(sv) + SvCUR(sv) + z;
2485 }
2486 Copy(fops, s, arg, U16);
2487 Safefree(fops);
2488 SvCOMPILED_on(sv);
2489}
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