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Make a little more C++-friendly for IBM's CSET++ compiler.
[p5sagit/p5-mst-13.2.git] / pp_ctl.c
CommitLineData
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)
760ac839 215 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
a0d0e21e 216 else
760ac839 217 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
a0d0e21e 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();
f967eb5f 577 gv_efullname(tmpstr, gv, Nullch);
a0d0e21e 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
1ce6579f 624 oldstack = curstack;
a0d0e21e 625 if (!sortstack) {
626 sortstack = newAV();
627 AvREAL_off(sortstack);
628 av_extend(sortstack, 32);
629 }
1ce6579f 630 SWITCHSTACK(curstack, sortstack);
a0d0e21e 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--];
760ac839 884 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
a0d0e21e 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
1ce6579f 922 /* We have to switch back to mainstack or die_where may try to pop
923 * the eval block from the wrong stack if die is being called from a
924 * signal handler. - dkindred@cs.cmu.edu */
925 if (curstack != mainstack) {
926 dSP;
927 SWITCHSTACK(curstack, mainstack);
928 }
a0d0e21e 929#ifdef I_STDARG
930 va_start(args, pat);
931#else
932 va_start(args);
933#endif
934 message = mess(pat, &args);
935 va_end(args);
748a9306 936 if (diehook && (cv = sv_2cv(diehook, &stash, &gv, 0)) && !CvDEPTH(cv)) {
937 dSP;
938
939 PUSHMARK(sp);
940 EXTEND(sp, 1);
941 PUSHs(sv_2mortal(newSVpv(message,0)));
942 PUTBACK;
943 perl_call_sv((SV*)cv, G_DISCARD);
944 }
a0d0e21e 945 restartop = die_where(message);
946 if ((!restartop && was_in_eval) || oldrunlevel > 1)
a5f75d66 947 Siglongjmp(top_env, 3);
a0d0e21e 948 return restartop;
949}
950
951OP *
952die_where(message)
953char *message;
954{
955 if (in_eval) {
956 I32 cxix;
957 register CONTEXT *cx;
958 I32 gimme;
959 SV **newsp;
960
4633a7c4 961 if (in_eval & 4) {
962 SV **svp;
963 STRLEN klen = strlen(message);
964
965 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
966 if (svp) {
967 if (!SvIOK(*svp)) {
968 static char prefix[] = "\t(in cleanup) ";
969 sv_upgrade(*svp, SVt_IV);
970 (void)SvIOK_only(*svp);
971 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
972 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
973 sv_catpvn(GvSV(errgv), message, klen);
974 }
975 sv_inc(*svp);
976 }
977 }
978 else
c07a80fd 979 sv_setpv(GvSV(errgv), message);
4633a7c4 980
a0d0e21e 981 cxix = dopoptoeval(cxstack_ix);
982 if (cxix >= 0) {
983 I32 optype;
984
985 if (cxix < cxstack_ix)
986 dounwind(cxix);
987
988 POPBLOCK(cx,curpm);
989 if (cx->cx_type != CXt_EVAL) {
760ac839 990 PerlIO_printf(PerlIO_stderr(), "panic: die %s", message);
a0d0e21e 991 my_exit(1);
992 }
993 POPEVAL(cx);
994
995 if (gimme == G_SCALAR)
996 *++newsp = &sv_undef;
997 stack_sp = newsp;
998
999 LEAVE;
748a9306 1000
a0d0e21e 1001 if (optype == OP_REQUIRE)
4633a7c4 1002 DIE("%s", SvPVx(GvSV(errgv), na));
a0d0e21e 1003 return pop_return();
1004 }
1005 }
760ac839 1006 PerlIO_printf(PerlIO_stderr(), "%s",message);
1007 PerlIO_flush(PerlIO_stderr());
a6c477ed 1008 if (e_tmpname) {
1009 if (e_fp) {
760ac839 1010 PerlIO_close(e_fp);
a6c477ed 1011 e_fp = Nullfp;
1012 }
a0d0e21e 1013 (void)UNLINK(e_tmpname);
a6c477ed 1014 Safefree(e_tmpname);
1015 e_tmpname = Nullch;
e632a5f6 1016 }
748a9306 1017 statusvalue = SHIFTSTATUS(statusvalue);
1018#ifdef VMS
1019 my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT);
1020#else
a0d0e21e 1021 my_exit((I32)((errno&255)?errno:((statusvalue&255)?statusvalue:255)));
748a9306 1022#endif
a0d0e21e 1023 return 0;
1024}
1025
1026PP(pp_xor)
1027{
1028 dSP; dPOPTOPssrl;
1029 if (SvTRUE(left) != SvTRUE(right))
1030 RETSETYES;
1031 else
1032 RETSETNO;
1033}
1034
1035PP(pp_andassign)
1036{
1037 dSP;
1038 if (!SvTRUE(TOPs))
1039 RETURN;
1040 else
1041 RETURNOP(cLOGOP->op_other);
1042}
1043
1044PP(pp_orassign)
1045{
1046 dSP;
1047 if (SvTRUE(TOPs))
1048 RETURN;
1049 else
1050 RETURNOP(cLOGOP->op_other);
1051}
1052
1053#ifdef DEPRECATED
1054PP(pp_entersubr)
1055{
1056 dSP;
1057 SV** mark = (stack_base + *markstack_ptr + 1);
1058 SV* cv = *mark;
1059 while (mark < sp) { /* emulate old interface */
1060 *mark = mark[1];
1061 mark++;
1062 }
1063 *sp = cv;
1064 return pp_entersub();
1065}
1066#endif
1067
1068PP(pp_caller)
1069{
1070 dSP;
1071 register I32 cxix = dopoptosub(cxstack_ix);
1072 register CONTEXT *cx;
1073 I32 dbcxix;
1074 SV *sv;
1075 I32 count = 0;
1076
1077 if (MAXARG)
1078 count = POPi;
1079 EXTEND(SP, 6);
1080 for (;;) {
1081 if (cxix < 0) {
1082 if (GIMME != G_ARRAY)
1083 RETPUSHUNDEF;
1084 RETURN;
1085 }
1086 if (DBsub && cxix >= 0 &&
1087 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1088 count++;
1089 if (!count--)
1090 break;
1091 cxix = dopoptosub(cxix - 1);
1092 }
1093 cx = &cxstack[cxix];
06a5b730 1094 if (cxstack[cxix].cx_type == CXt_SUB) {
1095 dbcxix = dopoptosub(cxix - 1);
1096 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1097 field below is defined for any cx. */
1098 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1099 cx = &cxstack[dbcxix];
1100 }
1101
a0d0e21e 1102 if (GIMME != G_ARRAY) {
1103 dTARGET;
1104
1105 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1106 PUSHs(TARG);
1107 RETURN;
1108 }
a0d0e21e 1109
1110 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1111 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1112 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1113 if (!MAXARG)
1114 RETURN;
06a5b730 1115 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
a0d0e21e 1116 sv = NEWSV(49, 0);
f967eb5f 1117 gv_efullname(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch);
a0d0e21e 1118 PUSHs(sv_2mortal(sv));
1119 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1120 }
1121 else {
1122 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1123 PUSHs(sv_2mortal(newSViv(0)));
1124 }
1125 PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
4633a7c4 1126 if (cx->cx_type == CXt_EVAL) {
06a5b730 1127 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1128 PUSHs(cx->blk_eval.cur_text);
06a5b730 1129 PUSHs(&sv_no);
1130 }
1131 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1132 /* Require, put the name. */
1133 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1134 PUSHs(&sv_yes);
1135 }
4633a7c4 1136 }
1137 else if (cx->cx_type == CXt_SUB &&
1138 cx->blk_sub.hasargs &&
1139 curcop->cop_stash == debstash)
1140 {
a0d0e21e 1141 AV *ary = cx->blk_sub.argarray;
1142 int off = AvARRAY(ary) - AvALLOC(ary);
1143
1144 if (!dbargs) {
1145 GV* tmpgv;
1146 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1147 SVt_PVAV)));
a5f75d66 1148 GvMULTI_on(tmpgv);
a0d0e21e 1149 AvREAL_off(dbargs); /* XXX Should be REIFY */
1150 }
1151
1152 if (AvMAX(dbargs) < AvFILL(ary) + off)
1153 av_extend(dbargs, AvFILL(ary) + off);
1154 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1155 AvFILL(dbargs) = AvFILL(ary) + off;
1156 }
1157 RETURN;
1158}
1159
1160static int
1161sortcv(a, b)
1162const void *a;
1163const void *b;
1164{
1165 SV **str1 = (SV **) a;
1166 SV **str2 = (SV **) b;
748a9306 1167 I32 oldsaveix = savestack_ix;
a0d0e21e 1168 I32 oldscopeix = scopestack_ix;
1169 I32 result;
1170 GvSV(firstgv) = *str1;
1171 GvSV(secondgv) = *str2;
1172 stack_sp = stack_base;
1173 op = sortcop;
a6c477ed 1174 runops();
a0d0e21e 1175 if (stack_sp != stack_base + 1)
1176 croak("Sort subroutine didn't return single value");
748a9306 1177 if (!SvNIOKp(*stack_sp))
a0d0e21e 1178 croak("Sort subroutine didn't return a numeric value");
1179 result = SvIV(*stack_sp);
1180 while (scopestack_ix > oldscopeix) {
1181 LEAVE;
1182 }
748a9306 1183 leave_scope(oldsaveix);
a0d0e21e 1184 return result;
1185}
1186
1187static int
1188sortcmp(a, b)
1189const void *a;
1190const void *b;
1191{
1192 register SV *str1 = *(SV **) a;
1193 register SV *str2 = *(SV **) b;
1194 I32 retval;
1195
4633a7c4 1196 if (!SvPOKp(str1)) {
1197 if (!SvPOKp(str2))
1198 return 0;
1199 else
1200 return -1;
1201 }
1202 if (!SvPOKp(str2))
1203 return 1;
1204
a0d0e21e 1205 if (SvCUR(str1) < SvCUR(str2)) {
1206 /*SUPPRESS 560*/
1207 if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str1)))
1208 return retval;
1209 else
1210 return -1;
1211 }
1212 /*SUPPRESS 560*/
1213 else if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str2)))
1214 return retval;
1215 else if (SvCUR(str1) == SvCUR(str2))
1216 return 0;
1217 else
1218 return 1;
1219}
1220
1221PP(pp_reset)
1222{
1223 dSP;
1224 char *tmps;
1225
1226 if (MAXARG < 1)
1227 tmps = "";
1228 else
1229 tmps = POPp;
1230 sv_reset(tmps, curcop->cop_stash);
1231 PUSHs(&sv_yes);
1232 RETURN;
1233}
1234
1235PP(pp_lineseq)
1236{
1237 return NORMAL;
1238}
1239
1240PP(pp_dbstate)
1241{
1242 curcop = (COP*)op;
1243 TAINT_NOT; /* Each statement is presumed innocent */
1244 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1245 FREETMPS;
1246
1247 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1248 {
1249 SV **sp;
1250 register CV *cv;
1251 register CONTEXT *cx;
748a9306 1252 I32 gimme = G_ARRAY;
a0d0e21e 1253 I32 hasargs;
1254 GV *gv;
1255
a0d0e21e 1256 gv = DBgv;
1257 cv = GvCV(gv);
a0d0e21e 1258 if (!cv)
1259 DIE("No DB::DB routine defined");
1260
06a5b730 1261 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1262 return NORMAL;
748a9306 1263
4633a7c4 1264 ENTER;
1265 SAVETMPS;
1266
748a9306 1267 SAVEI32(debug);
1268 SAVESPTR(stack_sp);
1269 debug = 0;
1270 hasargs = 0;
1271 sp = stack_sp;
1272
a0d0e21e 1273 push_return(op->op_next);
748a9306 1274 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e 1275 PUSHSUB(cx);
1276 CvDEPTH(cv)++;
1277 (void)SvREFCNT_inc(cv);
1278 SAVESPTR(curpad);
1279 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1280 RETURNOP(CvSTART(cv));
1281 }
1282 else
1283 return NORMAL;
1284}
1285
1286PP(pp_scope)
1287{
1288 return NORMAL;
1289}
1290
1291PP(pp_enteriter)
1292{
1293 dSP; dMARK;
1294 register CONTEXT *cx;
1295 I32 gimme = GIMME;
1296 SV **svp;
1297
4633a7c4 1298 ENTER;
1299 SAVETMPS;
1300
a0d0e21e 1301 if (op->op_targ)
1302 svp = &curpad[op->op_targ]; /* "my" variable */
1303 else
1304 svp = &GvSV((GV*)POPs); /* symbol table variable */
1305
4633a7c4 1306 SAVESPTR(*svp);
1307
a0d0e21e 1308 ENTER;
1309
1310 PUSHBLOCK(cx, CXt_LOOP, SP);
1311 PUSHLOOP(cx, svp, MARK);
4633a7c4 1312 if (op->op_flags & OPf_STACKED) {
1313 AV* av = (AV*)POPs;
1314 cx->blk_loop.iterary = av;
1315 cx->blk_loop.iterix = -1;
1316 }
1317 else {
1ce6579f 1318 cx->blk_loop.iterary = curstack;
1319 AvFILL(curstack) = sp - stack_base;
4633a7c4 1320 cx->blk_loop.iterix = MARK - stack_base;
1321 }
a0d0e21e 1322
1323 RETURN;
1324}
1325
1326PP(pp_enterloop)
1327{
1328 dSP;
1329 register CONTEXT *cx;
1330 I32 gimme = GIMME;
1331
1332 ENTER;
1333 SAVETMPS;
1334 ENTER;
1335
1336 PUSHBLOCK(cx, CXt_LOOP, SP);
1337 PUSHLOOP(cx, 0, SP);
1338
1339 RETURN;
1340}
1341
1342PP(pp_leaveloop)
1343{
1344 dSP;
1345 register CONTEXT *cx;
1346 I32 gimme;
1347 SV **newsp;
1348 PMOP *newpm;
1349 SV **mark;
1350
1351 POPBLOCK(cx,newpm);
1352 mark = newsp;
1353 POPLOOP(cx);
1354 if (gimme == G_SCALAR) {
1355 if (op->op_private & OPpLEAVE_VOID)
1356 ;
1357 else {
1358 if (mark < SP)
1359 *++newsp = sv_mortalcopy(*SP);
1360 else
1361 *++newsp = &sv_undef;
1362 }
1363 }
1364 else {
1365 while (mark < SP)
1366 *++newsp = sv_mortalcopy(*++mark);
1367 }
1368 curpm = newpm; /* Don't pop $1 et al till now */
1369 sp = newsp;
1370 LEAVE;
1371 LEAVE;
1372
1373 RETURN;
1374}
1375
1376PP(pp_return)
1377{
1378 dSP; dMARK;
1379 I32 cxix;
1380 register CONTEXT *cx;
1381 I32 gimme;
1382 SV **newsp;
1383 PMOP *newpm;
1384 I32 optype = 0;
1385
1ce6579f 1386 if (curstack == sortstack) {
a0d0e21e 1387 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9 1388 if (cxstack_ix > sortcxix)
1389 dounwind(sortcxix);
1ce6579f 1390 AvARRAY(curstack)[1] = *SP;
a0d0e21e 1391 stack_sp = stack_base + 1;
1392 return 0;
1393 }
1394 }
1395
1396 cxix = dopoptosub(cxstack_ix);
1397 if (cxix < 0)
1398 DIE("Can't return outside a subroutine");
1399 if (cxix < cxstack_ix)
1400 dounwind(cxix);
1401
1402 POPBLOCK(cx,newpm);
1403 switch (cx->cx_type) {
1404 case CXt_SUB:
1405 POPSUB(cx);
1406 break;
1407 case CXt_EVAL:
1408 POPEVAL(cx);
748a9306 1409 if (optype == OP_REQUIRE &&
1410 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1411 {
1412 char *name = cx->blk_eval.old_name;
1413 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1414 DIE("%s did not return a true value", name);
1415 }
a0d0e21e 1416 break;
1417 default:
1418 DIE("panic: return");
1419 break;
1420 }
1421
1422 if (gimme == G_SCALAR) {
1423 if (MARK < SP)
1424 *++newsp = sv_mortalcopy(*SP);
1425 else
1426 *++newsp = &sv_undef;
a0d0e21e 1427 }
1428 else {
a0d0e21e 1429 while (MARK < SP)
1430 *++newsp = sv_mortalcopy(*++MARK);
1431 }
1432 curpm = newpm; /* Don't pop $1 et al till now */
1433 stack_sp = newsp;
1434
1435 LEAVE;
1436 return pop_return();
1437}
1438
1439PP(pp_last)
1440{
1441 dSP;
1442 I32 cxix;
1443 register CONTEXT *cx;
1444 I32 gimme;
1445 I32 optype;
1446 OP *nextop;
1447 SV **newsp;
1448 PMOP *newpm;
1449 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 1450
1451 if (op->op_flags & OPf_SPECIAL) {
1452 cxix = dopoptoloop(cxstack_ix);
1453 if (cxix < 0)
1454 DIE("Can't \"last\" outside a block");
1455 }
1456 else {
1457 cxix = dopoptolabel(cPVOP->op_pv);
1458 if (cxix < 0)
1459 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1460 }
1461 if (cxix < cxstack_ix)
1462 dounwind(cxix);
1463
1464 POPBLOCK(cx,newpm);
1465 switch (cx->cx_type) {
1466 case CXt_LOOP:
1467 POPLOOP(cx);
1468 nextop = cx->blk_loop.last_op->op_next;
1469 LEAVE;
1470 break;
1471 case CXt_EVAL:
1472 POPEVAL(cx);
1473 nextop = pop_return();
1474 break;
1475 case CXt_SUB:
1476 POPSUB(cx);
1477 nextop = pop_return();
1478 break;
1479 default:
1480 DIE("panic: last");
1481 break;
1482 }
1483
1484 if (gimme == G_SCALAR) {
1485 if (mark < SP)
1486 *++newsp = sv_mortalcopy(*SP);
1487 else
1488 *++newsp = &sv_undef;
1489 }
1490 else {
1491 while (mark < SP)
1492 *++newsp = sv_mortalcopy(*++mark);
1493 }
1494 curpm = newpm; /* Don't pop $1 et al till now */
1495 sp = newsp;
1496
1497 LEAVE;
1498 RETURNOP(nextop);
1499}
1500
1501PP(pp_next)
1502{
1503 I32 cxix;
1504 register CONTEXT *cx;
1505 I32 oldsave;
1506
1507 if (op->op_flags & OPf_SPECIAL) {
1508 cxix = dopoptoloop(cxstack_ix);
1509 if (cxix < 0)
1510 DIE("Can't \"next\" outside a block");
1511 }
1512 else {
1513 cxix = dopoptolabel(cPVOP->op_pv);
1514 if (cxix < 0)
1515 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1516 }
1517 if (cxix < cxstack_ix)
1518 dounwind(cxix);
1519
1520 TOPBLOCK(cx);
1521 oldsave = scopestack[scopestack_ix - 1];
1522 LEAVE_SCOPE(oldsave);
1523 return cx->blk_loop.next_op;
1524}
1525
1526PP(pp_redo)
1527{
1528 I32 cxix;
1529 register CONTEXT *cx;
1530 I32 oldsave;
1531
1532 if (op->op_flags & OPf_SPECIAL) {
1533 cxix = dopoptoloop(cxstack_ix);
1534 if (cxix < 0)
1535 DIE("Can't \"redo\" outside a block");
1536 }
1537 else {
1538 cxix = dopoptolabel(cPVOP->op_pv);
1539 if (cxix < 0)
1540 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1541 }
1542 if (cxix < cxstack_ix)
1543 dounwind(cxix);
1544
1545 TOPBLOCK(cx);
1546 oldsave = scopestack[scopestack_ix - 1];
1547 LEAVE_SCOPE(oldsave);
1548 return cx->blk_loop.redo_op;
1549}
1550
1551static OP* lastgotoprobe;
1552
1553static OP *
1554dofindlabel(op,label,opstack)
1555OP *op;
1556char *label;
1557OP **opstack;
1558{
1559 OP *kid;
1560 OP **ops = opstack;
1561
1562 if (op->op_type == OP_LEAVE ||
1563 op->op_type == OP_SCOPE ||
1564 op->op_type == OP_LEAVELOOP ||
1565 op->op_type == OP_LEAVETRY)
1566 *ops++ = cUNOP->op_first;
1567 *ops = 0;
1568 if (op->op_flags & OPf_KIDS) {
1569 /* First try all the kids at this level, since that's likeliest. */
1570 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1571 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1572 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1573 return kid;
1574 }
1575 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1576 if (kid == lastgotoprobe)
1577 continue;
1578 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1579 if (ops > opstack &&
1580 (ops[-1]->op_type == OP_NEXTSTATE ||
1581 ops[-1]->op_type == OP_DBSTATE))
1582 *ops = kid;
1583 else
1584 *ops++ = kid;
1585 }
1586 if (op = dofindlabel(kid,label,ops))
1587 return op;
1588 }
1589 }
1590 *ops = 0;
1591 return 0;
1592}
1593
1594PP(pp_dump)
1595{
1596 return pp_goto(ARGS);
1597 /*NOTREACHED*/
1598}
1599
1600PP(pp_goto)
1601{
1602 dSP;
1603 OP *retop = 0;
1604 I32 ix;
1605 register CONTEXT *cx;
1606 OP *enterops[64];
1607 char *label;
1608 int do_dump = (op->op_type == OP_DUMP);
1609
1610 label = 0;
1611 if (op->op_flags & OPf_STACKED) {
1612 SV *sv = POPs;
1613
1614 /* This egregious kludge implements goto &subroutine */
1615 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1616 I32 cxix;
1617 register CONTEXT *cx;
1618 CV* cv = (CV*)SvRV(sv);
1619 SV** mark;
1620 I32 items = 0;
1621 I32 oldsave;
1622
4aa0a1f7 1623 if (!CvROOT(cv) && !CvXSUB(cv)) {
1624 if (CvGV(cv)) {
1625 SV *tmpstr = sv_newmortal();
f967eb5f 1626 gv_efullname(tmpstr, CvGV(cv), Nullch);
4aa0a1f7 1627 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1628 }
1629 DIE("Goto undefined subroutine");
1630 }
1631
a0d0e21e 1632 /* First do some returnish stuff. */
1633 cxix = dopoptosub(cxstack_ix);
1634 if (cxix < 0)
1635 DIE("Can't goto subroutine outside a subroutine");
1636 if (cxix < cxstack_ix)
1637 dounwind(cxix);
1638 TOPBLOCK(cx);
1639 mark = stack_sp;
1640 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1641 AV* av = cx->blk_sub.argarray;
1642
1643 items = AvFILL(av) + 1;
1ce6579f 1644 stack_sp++;
1645 EXTEND(stack_sp, items); /* @_ could have been extended. */
1646 Copy(AvARRAY(av), stack_sp, items, SV*);
a0d0e21e 1647 stack_sp += items;
1648 GvAV(defgv) = cx->blk_sub.savearray;
a0d0e21e 1649 AvREAL_off(av);
4633a7c4 1650 av_clear(av);
a0d0e21e 1651 }
1652 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1653 SvREFCNT_dec(cx->blk_sub.cv);
1654 oldsave = scopestack[scopestack_ix - 1];
1655 LEAVE_SCOPE(oldsave);
1656
1657 /* Now do some callish stuff. */
1658 SAVETMPS;
1659 if (CvXSUB(cv)) {
1660 if (CvOLDSTYLE(cv)) {
ecfc5424 1661 I32 (*fp3)_((int,int,int));
a0d0e21e 1662 while (sp > mark) {
1663 sp[1] = sp[0];
1664 sp--;
1665 }
ecfc5424 1666 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1667 items = (*fp3)(CvXSUBANY(cv).any_i32,
1668 mark - stack_base + 1,
1669 items);
a0d0e21e 1670 sp = stack_base + items;
1671 }
1672 else {
1ce6579f 1673 stack_sp--; /* There is no cv arg. */
a0d0e21e 1674 (void)(*CvXSUB(cv))(cv);
1675 }
1676 LEAVE;
1677 return pop_return();
1678 }
1679 else {
1680 AV* padlist = CvPADLIST(cv);
1681 SV** svp = AvARRAY(padlist);
1682 cx->blk_sub.cv = cv;
1683 cx->blk_sub.olddepth = CvDEPTH(cv);
1684 CvDEPTH(cv)++;
1685 if (CvDEPTH(cv) < 2)
1686 (void)SvREFCNT_inc(cv);
1687 else { /* save temporaries on recursion? */
1688 if (CvDEPTH(cv) == 100 && dowarn)
1689 warn("Deep recursion on subroutine \"%s\"",
1690 GvENAME(CvGV(cv)));
1691 if (CvDEPTH(cv) > AvFILL(padlist)) {
1692 AV *newpad = newAV();
4aa0a1f7 1693 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e 1694 I32 ix = AvFILL((AV*)svp[1]);
1695 svp = AvARRAY(svp[0]);
748a9306 1696 for ( ;ix > 0; ix--) {
a0d0e21e 1697 if (svp[ix] != &sv_undef) {
748a9306 1698 char *name = SvPVX(svp[ix]);
1699 if (SvFLAGS(svp[ix]) & SVf_FAKE) {
1700 /* outer lexical? */
1701 av_store(newpad, ix,
4aa0a1f7 1702 SvREFCNT_inc(oldpad[ix]) );
748a9306 1703 }
1704 else { /* our own lexical */
1705 if (*name == '@')
1706 av_store(newpad, ix, sv = (SV*)newAV());
1707 else if (*name == '%')
1708 av_store(newpad, ix, sv = (SV*)newHV());
1709 else
1710 av_store(newpad, ix, sv = NEWSV(0,0));
1711 SvPADMY_on(sv);
1712 }
a0d0e21e 1713 }
1714 else {
748a9306 1715 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e 1716 SvPADTMP_on(sv);
1717 }
1718 }
1719 if (cx->blk_sub.hasargs) {
1720 AV* av = newAV();
1721 av_extend(av, 0);
1722 av_store(newpad, 0, (SV*)av);
1723 AvFLAGS(av) = AVf_REIFY;
1724 }
1725 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1726 AvFILL(padlist) = CvDEPTH(cv);
1727 svp = AvARRAY(padlist);
1728 }
1729 }
1730 SAVESPTR(curpad);
1731 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1732 if (cx->blk_sub.hasargs) {
1733 AV* av = (AV*)curpad[0];
1734 SV** ary;
1735
1736 cx->blk_sub.savearray = GvAV(defgv);
1737 cx->blk_sub.argarray = av;
1738 GvAV(defgv) = cx->blk_sub.argarray;
1739 ++mark;
1740
1741 if (items >= AvMAX(av) + 1) {
1742 ary = AvALLOC(av);
1743 if (AvARRAY(av) != ary) {
1744 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1745 SvPVX(av) = (char*)ary;
1746 }
1747 if (items >= AvMAX(av) + 1) {
1748 AvMAX(av) = items - 1;
1749 Renew(ary,items+1,SV*);
1750 AvALLOC(av) = ary;
1751 SvPVX(av) = (char*)ary;
1752 }
1753 }
1754 Copy(mark,AvARRAY(av),items,SV*);
1755 AvFILL(av) = items - 1;
1756
1757 while (items--) {
1758 if (*mark)
1759 SvTEMP_off(*mark);
1760 mark++;
1761 }
1762 }
f967eb5f 1763 if (perldb && curstash != debstash) {
1764 /* &xsub is not copying @_ */
1ce6579f 1765 SV *sv = GvSV(DBsub);
1766 save_item(sv);
f967eb5f 1767 gv_efullname(sv, CvGV(cv), Nullch);
1768 /* We do not care about using sv to call CV,
1769 * just for info. */
1ce6579f 1770 }
a0d0e21e 1771 RETURNOP(CvSTART(cv));
1772 }
1773 }
1774 else
1775 label = SvPV(sv,na);
1776 }
1777 else if (op->op_flags & OPf_SPECIAL) {
1778 if (! do_dump)
1779 DIE("goto must have label");
1780 }
1781 else
1782 label = cPVOP->op_pv;
1783
1784 if (label && *label) {
1785 OP *gotoprobe = 0;
1786
1787 /* find label */
1788
1789 lastgotoprobe = 0;
1790 *enterops = 0;
1791 for (ix = cxstack_ix; ix >= 0; ix--) {
1792 cx = &cxstack[ix];
1793 switch (cx->cx_type) {
1794 case CXt_SUB:
1795 gotoprobe = CvROOT(cx->blk_sub.cv);
1796 break;
1797 case CXt_EVAL:
1798 gotoprobe = eval_root; /* XXX not good for nested eval */
1799 break;
1800 case CXt_LOOP:
1801 gotoprobe = cx->blk_oldcop->op_sibling;
1802 break;
1803 case CXt_SUBST:
1804 continue;
1805 case CXt_BLOCK:
1806 if (ix)
1807 gotoprobe = cx->blk_oldcop->op_sibling;
1808 else
1809 gotoprobe = main_root;
1810 break;
1811 default:
1812 if (ix)
1813 DIE("panic: goto");
1814 else
1815 gotoprobe = main_root;
1816 break;
1817 }
1818 retop = dofindlabel(gotoprobe, label, enterops);
1819 if (retop)
1820 break;
1821 lastgotoprobe = gotoprobe;
1822 }
1823 if (!retop)
1824 DIE("Can't find label %s", label);
1825
1826 /* pop unwanted frames */
1827
1828 if (ix < cxstack_ix) {
1829 I32 oldsave;
1830
1831 if (ix < 0)
1832 ix = 0;
1833 dounwind(ix);
1834 TOPBLOCK(cx);
1835 oldsave = scopestack[scopestack_ix];
1836 LEAVE_SCOPE(oldsave);
1837 }
1838
1839 /* push wanted frames */
1840
748a9306 1841 if (*enterops && enterops[1]) {
a0d0e21e 1842 OP *oldop = op;
748a9306 1843 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e 1844 op = enterops[ix];
1845 (*op->op_ppaddr)();
1846 }
1847 op = oldop;
1848 }
1849 }
1850
1851 if (do_dump) {
a5f75d66 1852#ifdef VMS
1853 if (!retop) retop = main_start;
1854#endif
a0d0e21e 1855 restartop = retop;
1856 do_undump = TRUE;
1857
1858 my_unexec();
1859
1860 restartop = 0; /* hmm, must be GNU unexec().. */
1861 do_undump = FALSE;
1862 }
1863
1ce6579f 1864 if (curstack == signalstack) {
748a9306 1865 restartop = retop;
a5f75d66 1866 Siglongjmp(top_env, 3);
748a9306 1867 }
1868
a0d0e21e 1869 RETURNOP(retop);
1870}
1871
1872PP(pp_exit)
1873{
1874 dSP;
1875 I32 anum;
1876
1877 if (MAXARG < 1)
1878 anum = 0;
1879 else
1880 anum = SvIVx(POPs);
1881 my_exit(anum);
1882 PUSHs(&sv_undef);
1883 RETURN;
1884}
1885
1886#ifdef NOTYET
1887PP(pp_nswitch)
1888{
1889 dSP;
1890 double value = SvNVx(GvSV(cCOP->cop_gv));
1891 register I32 match = I_32(value);
1892
1893 if (value < 0.0) {
1894 if (((double)match) > value)
1895 --match; /* was fractional--truncate other way */
1896 }
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 RETURNOP(op);
1904}
1905
1906PP(pp_cswitch)
1907{
1908 dSP;
1909 register I32 match;
1910
1911 if (multiline)
1912 op = op->op_next; /* can't assume anything */
1913 else {
1914 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1915 match -= cCOP->uop.scop.scop_offset;
1916 if (match < 0)
1917 match = 0;
1918 else if (match > cCOP->uop.scop.scop_max)
1919 match = cCOP->uop.scop.scop_max;
1920 op = cCOP->uop.scop.scop_next[match];
1921 }
1922 RETURNOP(op);
1923}
1924#endif
1925
1926/* Eval. */
1927
1928static void
1929save_lines(array, sv)
1930AV *array;
1931SV *sv;
1932{
1933 register char *s = SvPVX(sv);
1934 register char *send = SvPVX(sv) + SvCUR(sv);
1935 register char *t;
1936 register I32 line = 1;
1937
1938 while (s && s < send) {
1939 SV *tmpstr = NEWSV(85,0);
1940
1941 sv_upgrade(tmpstr, SVt_PVMG);
1942 t = strchr(s, '\n');
1943 if (t)
1944 t++;
1945 else
1946 t = send;
1947
1948 sv_setpvn(tmpstr, s, t - s);
1949 av_store(array, line++, tmpstr);
1950 s = t;
1951 }
1952}
1953
1954static OP *
1955doeval(gimme)
1956int gimme;
1957{
1958 dSP;
1959 OP *saveop = op;
1960 HV *newstash;
748a9306 1961 AV* comppadlist;
a0d0e21e 1962
1963 in_eval = 1;
1964
1ce6579f 1965 PUSHMARK(SP);
1966
a0d0e21e 1967 /* set up a scratch pad */
1968
1969 SAVEINT(padix);
1970 SAVESPTR(curpad);
1971 SAVESPTR(comppad);
1972 SAVESPTR(comppad_name);
1973 SAVEINT(comppad_name_fill);
1974 SAVEINT(min_intro_pending);
1975 SAVEINT(max_intro_pending);
748a9306 1976
1977 SAVESPTR(compcv);
1978 compcv = (CV*)NEWSV(1104,0);
1979 sv_upgrade((SV *)compcv, SVt_PVCV);
1980
a0d0e21e 1981 comppad = newAV();
1982 comppad_name = newAV();
1983 comppad_name_fill = 0;
1984 min_intro_pending = 0;
1985 av_push(comppad, Nullsv);
1986 curpad = AvARRAY(comppad);
1987 padix = 0;
1988
748a9306 1989 comppadlist = newAV();
1990 AvREAL_off(comppadlist);
8e07c86e 1991 av_store(comppadlist, 0, (SV*)comppad_name);
1992 av_store(comppadlist, 1, (SV*)comppad);
748a9306 1993 CvPADLIST(compcv) = comppadlist;
8e07c86e 1994 SAVEFREESV(compcv);
748a9306 1995
a0d0e21e 1996 /* make sure we compile in the right package */
1997
1998 newstash = curcop->cop_stash;
1999 if (curstash != newstash) {
2000 SAVESPTR(curstash);
2001 curstash = newstash;
2002 }
2003 SAVESPTR(beginav);
2004 beginav = newAV();
2005 SAVEFREESV(beginav);
2006
2007 /* try to compile it */
2008
2009 eval_root = Nullop;
2010 error_count = 0;
2011 curcop = &compiling;
2012 curcop->cop_arybase = 0;
c07a80fd 2013 SvREFCNT_dec(rs);
2014 rs = newSVpv("\n", 1);
1ce6579f 2015 if (saveop->op_flags & OPf_SPECIAL)
2016 in_eval |= 4;
2017 else
2018 sv_setpv(GvSV(errgv),"");
a0d0e21e 2019 if (yyparse() || error_count || !eval_root) {
2020 SV **newsp;
2021 I32 gimme;
2022 CONTEXT *cx;
2023 I32 optype;
2024
2025 op = saveop;
2026 if (eval_root) {
2027 op_free(eval_root);
2028 eval_root = Nullop;
2029 }
1ce6579f 2030 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e 2031 POPBLOCK(cx,curpm);
2032 POPEVAL(cx);
2033 pop_return();
2034 lex_end();
2035 LEAVE;
2036 if (optype == OP_REQUIRE)
4633a7c4 2037 DIE("%s", SvPVx(GvSV(errgv), na));
c07a80fd 2038 SvREFCNT_dec(rs);
2039 rs = SvREFCNT_inc(nrs);
a0d0e21e 2040 RETPUSHUNDEF;
2041 }
c07a80fd 2042 SvREFCNT_dec(rs);
2043 rs = SvREFCNT_inc(nrs);
a0d0e21e 2044 compiling.cop_line = 0;
a0d0e21e 2045 SAVEFREEOP(eval_root);
2046 if (gimme & G_ARRAY)
2047 list(eval_root);
2048 else
2049 scalar(eval_root);
2050
2051 DEBUG_x(dump_eval());
2052
2053 /* compiled okay, so do it */
2054
1ce6579f 2055 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e 2056 RETURNOP(eval_start);
2057}
2058
2059PP(pp_require)
2060{
2061 dSP;
2062 register CONTEXT *cx;
2063 SV *sv;
2064 char *name;
2065 char *tmpname;
2066 SV** svp;
2067 I32 gimme = G_SCALAR;
760ac839 2068 PerlIO *tryrsfp = 0;
a0d0e21e 2069
2070 sv = POPs;
4633a7c4 2071 if (SvNIOKp(sv) && !SvPOKp(sv)) {
a5f75d66 2072 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2073 DIE("Perl %s required--this is only version %s, stopped",
2074 SvPV(sv,na),patchlevel);
a0d0e21e 2075 RETPUSHYES;
2076 }
2077 name = SvPV(sv, na);
2078 if (!*name)
2079 DIE("Null filename used");
4633a7c4 2080 TAINT_PROPER("require");
a0d0e21e 2081 if (op->op_type == OP_REQUIRE &&
2082 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2083 *svp != &sv_undef)
2084 RETPUSHYES;
2085
2086 /* prepare to compile file */
2087
2088 tmpname = savepv(name);
2089 if (*tmpname == '/' ||
2090 (*tmpname == '.' &&
2091 (tmpname[1] == '/' ||
748a9306 2092 (tmpname[1] == '.' && tmpname[2] == '/')))
4633a7c4 2093#ifdef DOSISH
2094 || (tmpname[0] && tmpname[1] == ':')
2095#endif
748a9306 2096#ifdef VMS
4633a7c4 2097 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2098 (tmpname[1] == '-' || tmpname[1] == ']' || tmpname[1] == '>')))
748a9306 2099#endif
2100 )
a0d0e21e 2101 {
760ac839 2102 tryrsfp = PerlIO_open(tmpname,"r");
a0d0e21e 2103 }
2104 else {
2105 AV *ar = GvAVn(incgv);
2106 I32 i;
2107
2108 for (i = 0; i <= AvFILL(ar); i++) {
748a9306 2109#ifdef VMS
2110 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
4633a7c4 2111 continue;
2112 strcat(buf,name);
748a9306 2113#else
a0d0e21e 2114 (void)sprintf(buf, "%s/%s",
2115 SvPVx(*av_fetch(ar, i, TRUE), na), name);
748a9306 2116#endif
760ac839 2117 tryrsfp = PerlIO_open(buf, "r");
a0d0e21e 2118 if (tryrsfp) {
2119 char *s = buf;
2120
2121 if (*s == '.' && s[1] == '/')
2122 s += 2;
2123 Safefree(tmpname);
2124 tmpname = savepv(s);
2125 break;
2126 }
2127 }
2128 }
2129 SAVESPTR(compiling.cop_filegv);
2130 compiling.cop_filegv = gv_fetchfile(tmpname);
2131 Safefree(tmpname);
2132 tmpname = Nullch;
2133 if (!tryrsfp) {
2134 if (op->op_type == OP_REQUIRE) {
2135 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2136 if (instr(tokenbuf,".h "))
2137 strcat(tokenbuf," (change .h to .ph maybe?)");
2138 if (instr(tokenbuf,".ph "))
2139 strcat(tokenbuf," (did you run h2ph?)");
2140 DIE("%s",tokenbuf);
2141 }
2142
2143 RETPUSHUNDEF;
2144 }
2145
2146 /* Assume success here to prevent recursive requirement. */
2147 (void)hv_store(GvHVn(incgv), name, strlen(name),
2148 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2149
2150 ENTER;
2151 SAVETMPS;
2152 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73 2153 if (rsfp_filters){
2154 save_aptr(&rsfp_filters);
2155 rsfp_filters = NULL;
2156 }
2157
a0d0e21e 2158 rsfp = tryrsfp;
2159 name = savepv(name);
2160 SAVEFREEPV(name);
2161 SAVEI32(hints);
2162 hints = 0;
2163
2164 /* switch to eval mode */
2165
2166 push_return(op->op_next);
2167 PUSHBLOCK(cx, CXt_EVAL, SP);
2168 PUSHEVAL(cx, name, compiling.cop_filegv);
2169
2170 compiling.cop_line = 0;
2171
2172 PUTBACK;
2173 return doeval(G_SCALAR);
2174}
2175
2176PP(pp_dofile)
2177{
2178 return pp_require(ARGS);
2179}
2180
2181PP(pp_entereval)
2182{
2183 dSP;
2184 register CONTEXT *cx;
2185 dPOPss;
2186 I32 gimme = GIMME;
2187 char tmpbuf[32];
2188 STRLEN len;
2189
2190 if (!SvPV(sv,len) || !len)
2191 RETPUSHUNDEF;
748a9306 2192 TAINT_PROPER("eval");
a0d0e21e 2193
2194 ENTER;
a0d0e21e 2195 lex_start(sv);
748a9306 2196 SAVETMPS;
a0d0e21e 2197
2198 /* switch to eval mode */
2199
748a9306 2200 SAVESPTR(compiling.cop_filegv);
a0d0e21e 2201 sprintf(tmpbuf, "_<(eval %d)", ++evalseq);
2202 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2203 compiling.cop_line = 1;
2204 SAVEDELETE(defstash, savepv(tmpbuf), strlen(tmpbuf));
2205 SAVEI32(hints);
2206 hints = op->op_targ;
2207
2208 push_return(op->op_next);
2209 PUSHBLOCK(cx, CXt_EVAL, SP);
2210 PUSHEVAL(cx, 0, compiling.cop_filegv);
2211
2212 /* prepare to compile string */
2213
2214 if (perldb && curstash != debstash)
2215 save_lines(GvAV(compiling.cop_filegv), linestr);
2216 PUTBACK;
2217 return doeval(gimme);
2218}
2219
2220PP(pp_leaveeval)
2221{
2222 dSP;
2223 register SV **mark;
2224 SV **newsp;
2225 PMOP *newpm;
2226 I32 gimme;
2227 register CONTEXT *cx;
2228 OP *retop;
760ac839 2229 U8 save_flags = op -> op_flags;
a0d0e21e 2230 I32 optype;
2231
2232 POPBLOCK(cx,newpm);
2233 POPEVAL(cx);
2234 retop = pop_return();
2235
2236 if (gimme == G_SCALAR) {
2237 if (op->op_private & OPpLEAVE_VOID)
2238 MARK = newsp;
2239 else {
2240 MARK = newsp + 1;
2241 if (MARK <= SP) {
2242 if (SvFLAGS(TOPs) & SVs_TEMP)
2243 *MARK = TOPs;
2244 else
2245 *MARK = sv_mortalcopy(TOPs);
2246 }
2247 else {
2248 MEXTEND(mark,0);
2249 *MARK = &sv_undef;
2250 }
2251 }
2252 SP = MARK;
2253 }
2254 else {
2255 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2256 if (!(SvFLAGS(*mark) & SVs_TEMP))
a0d0e21e 2257 *mark = sv_mortalcopy(*mark);
2258 /* in case LEAVE wipes old return values */
2259 }
2260 curpm = newpm; /* Don't pop $1 et al till now */
2261
1ce6579f 2262 if (optype == OP_REQUIRE &&
2263 !(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
a0d0e21e 2264 char *name = cx->blk_eval.old_name;
2265
1ce6579f 2266 /* Unassume the success we assumed earlier. */
2267 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
2268 retop = die("%s did not return a true value", name);
a0d0e21e 2269 }
2270
2271 lex_end();
2272 LEAVE;
760ac839 2273 if (!(save_flags & OPf_SPECIAL))
1ce6579f 2274 sv_setpv(GvSV(errgv),"");
a0d0e21e 2275
2276 RETURNOP(retop);
2277}
2278
a0d0e21e 2279PP(pp_entertry)
2280{
2281 dSP;
2282 register CONTEXT *cx;
2283 I32 gimme = GIMME;
2284
2285 ENTER;
2286 SAVETMPS;
2287
2288 push_return(cLOGOP->op_other->op_next);
2289 PUSHBLOCK(cx, CXt_EVAL, SP);
2290 PUSHEVAL(cx, 0, 0);
2291 eval_root = op; /* Only needed so that goto works right. */
2292
2293 in_eval = 1;
4633a7c4 2294 sv_setpv(GvSV(errgv),"");
a0d0e21e 2295 RETURN;
2296}
2297
2298PP(pp_leavetry)
2299{
2300 dSP;
2301 register SV **mark;
2302 SV **newsp;
2303 PMOP *newpm;
2304 I32 gimme;
2305 register CONTEXT *cx;
2306 I32 optype;
2307
2308 POPBLOCK(cx,newpm);
2309 POPEVAL(cx);
2310 pop_return();
2311
2312 if (gimme == G_SCALAR) {
2313 if (op->op_private & OPpLEAVE_VOID)
2314 MARK = newsp;
2315 else {
2316 MARK = newsp + 1;
2317 if (MARK <= SP) {
2318 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2319 *MARK = TOPs;
2320 else
2321 *MARK = sv_mortalcopy(TOPs);
2322 }
2323 else {
2324 MEXTEND(mark,0);
2325 *MARK = &sv_undef;
2326 }
2327 }
2328 SP = MARK;
2329 }
2330 else {
2331 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2332 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
a0d0e21e 2333 *mark = sv_mortalcopy(*mark);
2334 /* in case LEAVE wipes old return values */
2335 }
2336 curpm = newpm; /* Don't pop $1 et al till now */
2337
2338 LEAVE;
4633a7c4 2339 sv_setpv(GvSV(errgv),"");
a0d0e21e 2340 RETURN;
2341}
2342
2343static void
2344doparseform(sv)
2345SV *sv;
2346{
2347 STRLEN len;
2348 register char *s = SvPV_force(sv, len);
2349 register char *send = s + len;
2350 register char *base;
2351 register I32 skipspaces = 0;
2352 bool noblank;
2353 bool repeat;
2354 bool postspace = FALSE;
2355 U16 *fops;
2356 register U16 *fpc;
2357 U16 *linepc;
2358 register I32 arg;
2359 bool ischop;
2360
2361 New(804, fops, (send - s)*3+2, U16); /* Almost certainly too long... */
2362 fpc = fops;
2363
2364 if (s < send) {
2365 linepc = fpc;
2366 *fpc++ = FF_LINEMARK;
2367 noblank = repeat = FALSE;
2368 base = s;
2369 }
2370
2371 while (s <= send) {
2372 switch (*s++) {
2373 default:
2374 skipspaces = 0;
2375 continue;
2376
2377 case '~':
2378 if (*s == '~') {
2379 repeat = TRUE;
2380 *s = ' ';
2381 }
2382 noblank = TRUE;
2383 s[-1] = ' ';
2384 /* FALL THROUGH */
2385 case ' ': case '\t':
2386 skipspaces++;
2387 continue;
2388
2389 case '\n': case 0:
2390 arg = s - base;
2391 skipspaces++;
2392 arg -= skipspaces;
2393 if (arg) {
2394 if (postspace) {
2395 *fpc++ = FF_SPACE;
2396 postspace = FALSE;
2397 }
2398 *fpc++ = FF_LITERAL;
2399 *fpc++ = arg;
2400 }
2401 if (s <= send)
2402 skipspaces--;
2403 if (skipspaces) {
2404 *fpc++ = FF_SKIP;
2405 *fpc++ = skipspaces;
2406 }
2407 skipspaces = 0;
2408 if (s <= send)
2409 *fpc++ = FF_NEWLINE;
2410 if (noblank) {
2411 *fpc++ = FF_BLANK;
2412 if (repeat)
2413 arg = fpc - linepc + 1;
2414 else
2415 arg = 0;
2416 *fpc++ = arg;
2417 }
2418 if (s < send) {
2419 linepc = fpc;
2420 *fpc++ = FF_LINEMARK;
2421 noblank = repeat = FALSE;
2422 base = s;
2423 }
2424 else
2425 s++;
2426 continue;
2427
2428 case '@':
2429 case '^':
2430 ischop = s[-1] == '^';
2431
2432 if (postspace) {
2433 *fpc++ = FF_SPACE;
2434 postspace = FALSE;
2435 }
2436 arg = (s - base) - 1;
2437 if (arg) {
2438 *fpc++ = FF_LITERAL;
2439 *fpc++ = arg;
2440 }
2441
2442 base = s - 1;
2443 *fpc++ = FF_FETCH;
2444 if (*s == '*') {
2445 s++;
2446 *fpc++ = 0;
2447 *fpc++ = FF_LINEGLOB;
2448 }
2449 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2450 arg = ischop ? 512 : 0;
2451 base = s - 1;
2452 while (*s == '#')
2453 s++;
2454 if (*s == '.') {
2455 char *f;
2456 s++;
2457 f = s;
2458 while (*s == '#')
2459 s++;
2460 arg |= 256 + (s - f);
2461 }
2462 *fpc++ = s - base; /* fieldsize for FETCH */
2463 *fpc++ = FF_DECIMAL;
2464 *fpc++ = arg;
2465 }
2466 else {
2467 I32 prespace = 0;
2468 bool ismore = FALSE;
2469
2470 if (*s == '>') {
2471 while (*++s == '>') ;
2472 prespace = FF_SPACE;
2473 }
2474 else if (*s == '|') {
2475 while (*++s == '|') ;
2476 prespace = FF_HALFSPACE;
2477 postspace = TRUE;
2478 }
2479 else {
2480 if (*s == '<')
2481 while (*++s == '<') ;
2482 postspace = TRUE;
2483 }
2484 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2485 s += 3;
2486 ismore = TRUE;
2487 }
2488 *fpc++ = s - base; /* fieldsize for FETCH */
2489
2490 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2491
2492 if (prespace)
2493 *fpc++ = prespace;
2494 *fpc++ = FF_ITEM;
2495 if (ismore)
2496 *fpc++ = FF_MORE;
2497 if (ischop)
2498 *fpc++ = FF_CHOP;
2499 }
2500 base = s;
2501 skipspaces = 0;
2502 continue;
2503 }
2504 }
2505 *fpc++ = FF_END;
2506
2507 arg = fpc - fops;
2508 { /* need to jump to the next word */
2509 int z;
2510 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2511 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2512 s = SvPVX(sv) + SvCUR(sv) + z;
2513 }
2514 Copy(fops, s, arg, U16);
2515 Safefree(fops);
2516 SvCOMPILED_on(sv);
2517}
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