3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
20 /* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
32 #define PERL_IN_PP_CTL_C
36 #define WORD_ALIGN sizeof(U32)
39 #define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
41 static I32 run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen);
49 cxix = dopoptosub(cxstack_ix);
53 switch (cxstack[cxix].blk_gimme) {
70 /* XXXX Should store the old value to allow for tie/overload - and
71 restore in regcomp, where marked with XXXX. */
80 register PMOP *pm = (PMOP*)cLOGOP->op_other;
82 MAGIC *mg = Null(MAGIC*);
84 /* prevent recompiling under /o and ithreads. */
85 #if defined(USE_ITHREADS)
86 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
87 if (PL_op->op_flags & OPf_STACKED) {
96 if (PL_op->op_flags & OPf_STACKED) {
97 /* multiple args; concatentate them */
99 tmpstr = PAD_SV(ARGTARG);
100 sv_setpvn(tmpstr, "", 0);
101 while (++MARK <= SP) {
102 if (PL_amagic_generation) {
104 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
105 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
107 sv_setsv(tmpstr, sv);
111 sv_catsv(tmpstr, *MARK);
120 SV *sv = SvRV(tmpstr);
122 mg = mg_find(sv, PERL_MAGIC_qr);
125 regexp *re = (regexp *)mg->mg_obj;
126 ReREFCNT_dec(PM_GETRE(pm));
127 PM_SETRE(pm, ReREFCNT_inc(re));
131 const char *t = SvPV_const(tmpstr, len);
133 /* Check against the last compiled regexp. */
134 if (!PM_GETRE(pm) || !PM_GETRE(pm)->precomp ||
135 PM_GETRE(pm)->prelen != (I32)len ||
136 memNE(PM_GETRE(pm)->precomp, t, len))
139 ReREFCNT_dec(PM_GETRE(pm));
140 PM_SETRE(pm, Null(REGEXP*)); /* crucial if regcomp aborts */
142 if (PL_op->op_flags & OPf_SPECIAL)
143 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
145 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
147 pm->op_pmdynflags |= PMdf_DYN_UTF8;
149 pm->op_pmdynflags &= ~PMdf_DYN_UTF8;
150 if (pm->op_pmdynflags & PMdf_UTF8)
151 t = (char*)bytes_to_utf8((U8*)t, &len);
153 PM_SETRE(pm, CALLREGCOMP(aTHX_ (char *)t, (char *)t + len, pm));
154 if (!DO_UTF8(tmpstr) && (pm->op_pmdynflags & PMdf_UTF8))
156 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
157 inside tie/overload accessors. */
161 #ifndef INCOMPLETE_TAINTS
164 pm->op_pmdynflags |= PMdf_TAINTED;
166 pm->op_pmdynflags &= ~PMdf_TAINTED;
170 if (!PM_GETRE(pm)->prelen && PL_curpm)
172 else if (strEQ("\\s+", PM_GETRE(pm)->precomp))
173 pm->op_pmflags |= PMf_WHITE;
175 pm->op_pmflags &= ~PMf_WHITE;
177 /* XXX runtime compiled output needs to move to the pad */
178 if (pm->op_pmflags & PMf_KEEP) {
179 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
180 #if !defined(USE_ITHREADS)
181 /* XXX can't change the optree at runtime either */
182 cLOGOP->op_first->op_next = PL_op->op_next;
191 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
192 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
193 register SV * const dstr = cx->sb_dstr;
194 register char *s = cx->sb_s;
195 register char *m = cx->sb_m;
196 char *orig = cx->sb_orig;
197 register REGEXP * const rx = cx->sb_rx;
199 REGEXP *old = PM_GETRE(pm);
206 rxres_restore(&cx->sb_rxres, rx);
207 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
209 if (cx->sb_iters++) {
210 const I32 saviters = cx->sb_iters;
211 if (cx->sb_iters > cx->sb_maxiters)
212 DIE(aTHX_ "Substitution loop");
214 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
215 cx->sb_rxtainted |= 2;
216 sv_catsv(dstr, POPs);
219 if (cx->sb_once || !CALLREGEXEC(aTHX_ rx, s, cx->sb_strend, orig,
220 s == m, cx->sb_targ, NULL,
221 ((cx->sb_rflags & REXEC_COPY_STR)
222 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
223 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
225 SV *targ = cx->sb_targ;
227 assert(cx->sb_strend >= s);
228 if(cx->sb_strend > s) {
229 if (DO_UTF8(dstr) && !SvUTF8(targ))
230 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
232 sv_catpvn(dstr, s, cx->sb_strend - s);
234 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
236 #ifdef PERL_OLD_COPY_ON_WRITE
238 sv_force_normal_flags(targ, SV_COW_DROP_PV);
244 SvPV_set(targ, SvPVX(dstr));
245 SvCUR_set(targ, SvCUR(dstr));
246 SvLEN_set(targ, SvLEN(dstr));
249 SvPV_set(dstr, (char*)0);
252 TAINT_IF(cx->sb_rxtainted & 1);
253 PUSHs(sv_2mortal(newSViv(saviters - 1)));
255 (void)SvPOK_only_UTF8(targ);
256 TAINT_IF(cx->sb_rxtainted);
260 LEAVE_SCOPE(cx->sb_oldsave);
263 RETURNOP(pm->op_next);
265 cx->sb_iters = saviters;
267 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
270 cx->sb_orig = orig = rx->subbeg;
272 cx->sb_strend = s + (cx->sb_strend - m);
274 cx->sb_m = m = rx->startp[0] + orig;
276 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
277 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
279 sv_catpvn(dstr, s, m-s);
281 cx->sb_s = rx->endp[0] + orig;
282 { /* Update the pos() information. */
283 SV *sv = cx->sb_targ;
286 if (SvTYPE(sv) < SVt_PVMG)
287 SvUPGRADE(sv, SVt_PVMG);
288 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
289 sv_magic(sv, Nullsv, PERL_MAGIC_regex_global, Nullch, 0);
290 mg = mg_find(sv, PERL_MAGIC_regex_global);
298 (void)ReREFCNT_inc(rx);
299 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
300 rxres_save(&cx->sb_rxres, rx);
301 RETURNOP(pm->op_pmreplstart);
305 Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
310 if (!p || p[1] < rx->nparens) {
311 #ifdef PERL_OLD_COPY_ON_WRITE
312 i = 7 + rx->nparens * 2;
314 i = 6 + rx->nparens * 2;
323 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : Nullch);
324 RX_MATCH_COPIED_off(rx);
326 #ifdef PERL_OLD_COPY_ON_WRITE
327 *p++ = PTR2UV(rx->saved_copy);
328 rx->saved_copy = Nullsv;
333 *p++ = PTR2UV(rx->subbeg);
334 *p++ = (UV)rx->sublen;
335 for (i = 0; i <= rx->nparens; ++i) {
336 *p++ = (UV)rx->startp[i];
337 *p++ = (UV)rx->endp[i];
342 Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
347 RX_MATCH_COPY_FREE(rx);
348 RX_MATCH_COPIED_set(rx, *p);
351 #ifdef PERL_OLD_COPY_ON_WRITE
353 SvREFCNT_dec (rx->saved_copy);
354 rx->saved_copy = INT2PTR(SV*,*p);
360 rx->subbeg = INT2PTR(char*,*p++);
361 rx->sublen = (I32)(*p++);
362 for (i = 0; i <= rx->nparens; ++i) {
363 rx->startp[i] = (I32)(*p++);
364 rx->endp[i] = (I32)(*p++);
369 Perl_rxres_free(pTHX_ void **rsp)
375 void *tmp = INT2PTR(char*,*p);
378 Poison(*p, 1, sizeof(*p));
380 Safefree(INT2PTR(char*,*p));
382 #ifdef PERL_OLD_COPY_ON_WRITE
384 SvREFCNT_dec (INT2PTR(SV*,p[1]));
394 dSP; dMARK; dORIGMARK;
395 register SV *tmpForm = *++MARK;
400 register SV *sv = Nullsv;
401 const char *item = Nullch;
405 bool chopspace = (strchr(PL_chopset, ' ') != Nullch);
406 const char *chophere = Nullch;
407 char *linemark = Nullch;
409 bool gotsome = FALSE;
411 STRLEN fudge = SvPOK(tmpForm)
412 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
413 bool item_is_utf8 = FALSE;
414 bool targ_is_utf8 = FALSE;
420 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
421 if (SvREADONLY(tmpForm)) {
422 SvREADONLY_off(tmpForm);
423 parseres = doparseform(tmpForm);
424 SvREADONLY_on(tmpForm);
427 parseres = doparseform(tmpForm);
431 SvPV_force(PL_formtarget, len);
432 if (DO_UTF8(PL_formtarget))
434 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
436 f = SvPV_const(tmpForm, len);
437 /* need to jump to the next word */
438 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
442 const char *name = "???";
445 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
446 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
447 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
448 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
449 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
451 case FF_CHECKNL: name = "CHECKNL"; break;
452 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
453 case FF_SPACE: name = "SPACE"; break;
454 case FF_HALFSPACE: name = "HALFSPACE"; break;
455 case FF_ITEM: name = "ITEM"; break;
456 case FF_CHOP: name = "CHOP"; break;
457 case FF_LINEGLOB: name = "LINEGLOB"; break;
458 case FF_NEWLINE: name = "NEWLINE"; break;
459 case FF_MORE: name = "MORE"; break;
460 case FF_LINEMARK: name = "LINEMARK"; break;
461 case FF_END: name = "END"; break;
462 case FF_0DECIMAL: name = "0DECIMAL"; break;
463 case FF_LINESNGL: name = "LINESNGL"; break;
466 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
468 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
479 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
480 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
482 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
483 t = SvEND(PL_formtarget);
486 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
487 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
489 sv_utf8_upgrade(PL_formtarget);
490 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
491 t = SvEND(PL_formtarget);
511 if (ckWARN(WARN_SYNTAX))
512 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
519 const char *s = item = SvPV_const(sv, len);
522 itemsize = sv_len_utf8(sv);
523 if (itemsize != (I32)len) {
525 if (itemsize > fieldsize) {
526 itemsize = fieldsize;
527 itembytes = itemsize;
528 sv_pos_u2b(sv, &itembytes, 0);
532 send = chophere = s + itembytes;
542 sv_pos_b2u(sv, &itemsize);
546 item_is_utf8 = FALSE;
547 if (itemsize > fieldsize)
548 itemsize = fieldsize;
549 send = chophere = s + itemsize;
563 const char *s = item = SvPV_const(sv, len);
566 itemsize = sv_len_utf8(sv);
567 if (itemsize != (I32)len) {
569 if (itemsize <= fieldsize) {
570 const char *send = chophere = s + itemsize;
583 itemsize = fieldsize;
584 itembytes = itemsize;
585 sv_pos_u2b(sv, &itembytes, 0);
586 send = chophere = s + itembytes;
587 while (s < send || (s == send && isSPACE(*s))) {
597 if (strchr(PL_chopset, *s))
602 itemsize = chophere - item;
603 sv_pos_b2u(sv, &itemsize);
609 item_is_utf8 = FALSE;
610 if (itemsize <= fieldsize) {
611 const char *const send = chophere = s + itemsize;
624 itemsize = fieldsize;
625 send = chophere = s + itemsize;
626 while (s < send || (s == send && isSPACE(*s))) {
636 if (strchr(PL_chopset, *s))
641 itemsize = chophere - item;
647 arg = fieldsize - itemsize;
656 arg = fieldsize - itemsize;
667 const char *s = item;
671 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
673 sv_utf8_upgrade(PL_formtarget);
674 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
675 t = SvEND(PL_formtarget);
679 if (UTF8_IS_CONTINUED(*s)) {
680 STRLEN skip = UTF8SKIP(s);
697 if ( !((*t++ = *s++) & ~31) )
703 if (targ_is_utf8 && !item_is_utf8) {
704 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
706 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
707 for (; t < SvEND(PL_formtarget); t++) {
720 const int ch = *t++ = *s++;
723 if ( !((*t++ = *s++) & ~31) )
732 const char *s = chophere;
734 while (*s && isSPACE(*s))
750 const char *s = item = SvPV_const(sv, len);
752 if ((item_is_utf8 = DO_UTF8(sv)))
753 itemsize = sv_len_utf8(sv);
755 bool chopped = FALSE;
756 const char *const send = s + len;
758 chophere = s + itemsize;
774 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
776 SvUTF8_on(PL_formtarget);
778 SvCUR_set(sv, chophere - item);
779 sv_catsv(PL_formtarget, sv);
780 SvCUR_set(sv, itemsize);
782 sv_catsv(PL_formtarget, sv);
784 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
785 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
786 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
795 #if defined(USE_LONG_DOUBLE)
796 fmt = (arg & 256) ? "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl;
798 fmt = (arg & 256) ? "%#0*.*f" : "%0*.*f";
803 #if defined(USE_LONG_DOUBLE)
804 fmt = (arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl;
806 fmt = (arg & 256) ? "%#*.*f" : "%*.*f";
809 /* If the field is marked with ^ and the value is undefined,
811 if ((arg & 512) && !SvOK(sv)) {
819 /* overflow evidence */
820 if (num_overflow(value, fieldsize, arg)) {
826 /* Formats aren't yet marked for locales, so assume "yes". */
828 STORE_NUMERIC_STANDARD_SET_LOCAL();
829 sprintf(t, fmt, (int) fieldsize, (int) arg & 255, value);
830 RESTORE_NUMERIC_STANDARD();
837 while (t-- > linemark && *t == ' ') ;
845 if (arg) { /* repeat until fields exhausted? */
847 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
848 lines += FmLINES(PL_formtarget);
851 if (strnEQ(linemark, linemark - arg, arg))
852 DIE(aTHX_ "Runaway format");
855 SvUTF8_on(PL_formtarget);
856 FmLINES(PL_formtarget) = lines;
858 RETURNOP(cLISTOP->op_first);
869 const char *s = chophere;
870 const char *send = item + len;
872 while (*s && isSPACE(*s) && s < send)
877 arg = fieldsize - itemsize;
884 if (strnEQ(s1," ",3)) {
885 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
896 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
898 SvUTF8_on(PL_formtarget);
899 FmLINES(PL_formtarget) += lines;
911 if (PL_stack_base + *PL_markstack_ptr == SP) {
913 if (GIMME_V == G_SCALAR)
914 XPUSHs(sv_2mortal(newSViv(0)));
915 RETURNOP(PL_op->op_next->op_next);
917 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
918 pp_pushmark(); /* push dst */
919 pp_pushmark(); /* push src */
920 ENTER; /* enter outer scope */
923 if (PL_op->op_private & OPpGREP_LEX)
924 SAVESPTR(PAD_SVl(PL_op->op_targ));
927 ENTER; /* enter inner scope */
930 src = PL_stack_base[*PL_markstack_ptr];
932 if (PL_op->op_private & OPpGREP_LEX)
933 PAD_SVl(PL_op->op_targ) = src;
938 if (PL_op->op_type == OP_MAPSTART)
939 pp_pushmark(); /* push top */
940 return ((LOGOP*)PL_op->op_next)->op_other;
945 DIE(aTHX_ "panic: mapstart"); /* uses grepstart */
951 const I32 gimme = GIMME_V;
952 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
958 /* first, move source pointer to the next item in the source list */
959 ++PL_markstack_ptr[-1];
961 /* if there are new items, push them into the destination list */
962 if (items && gimme != G_VOID) {
963 /* might need to make room back there first */
964 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
965 /* XXX this implementation is very pessimal because the stack
966 * is repeatedly extended for every set of items. Is possible
967 * to do this without any stack extension or copying at all
968 * by maintaining a separate list over which the map iterates
969 * (like foreach does). --gsar */
971 /* everything in the stack after the destination list moves
972 * towards the end the stack by the amount of room needed */
973 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
975 /* items to shift up (accounting for the moved source pointer) */
976 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
978 /* This optimization is by Ben Tilly and it does
979 * things differently from what Sarathy (gsar)
980 * is describing. The downside of this optimization is
981 * that leaves "holes" (uninitialized and hopefully unused areas)
982 * to the Perl stack, but on the other hand this
983 * shouldn't be a problem. If Sarathy's idea gets
984 * implemented, this optimization should become
985 * irrelevant. --jhi */
987 shift = count; /* Avoid shifting too often --Ben Tilly */
992 PL_markstack_ptr[-1] += shift;
993 *PL_markstack_ptr += shift;
997 /* copy the new items down to the destination list */
998 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
999 if (gimme == G_ARRAY) {
1001 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1004 /* scalar context: we don't care about which values map returns
1005 * (we use undef here). And so we certainly don't want to do mortal
1006 * copies of meaningless values. */
1007 while (items-- > 0) {
1009 *dst-- = &PL_sv_undef;
1013 LEAVE; /* exit inner scope */
1016 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
1018 (void)POPMARK; /* pop top */
1019 LEAVE; /* exit outer scope */
1020 (void)POPMARK; /* pop src */
1021 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
1022 (void)POPMARK; /* pop dst */
1023 SP = PL_stack_base + POPMARK; /* pop original mark */
1024 if (gimme == G_SCALAR) {
1025 if (PL_op->op_private & OPpGREP_LEX) {
1026 SV* sv = sv_newmortal();
1027 sv_setiv(sv, items);
1035 else if (gimme == G_ARRAY)
1042 ENTER; /* enter inner scope */
1045 /* set $_ to the new source item */
1046 src = PL_stack_base[PL_markstack_ptr[-1]];
1048 if (PL_op->op_private & OPpGREP_LEX)
1049 PAD_SVl(PL_op->op_targ) = src;
1053 RETURNOP(cLOGOP->op_other);
1061 if (GIMME == G_ARRAY)
1063 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1064 return cLOGOP->op_other;
1073 if (GIMME == G_ARRAY) {
1074 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
1078 SV *targ = PAD_SV(PL_op->op_targ);
1081 if (PL_op->op_private & OPpFLIP_LINENUM) {
1082 if (GvIO(PL_last_in_gv)) {
1083 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1086 GV *gv = gv_fetchpv(".", TRUE, SVt_PV);
1087 if (gv && GvSV(gv)) flip = SvIV(sv) == SvIV(GvSV(gv));
1093 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
1094 if (PL_op->op_flags & OPf_SPECIAL) {
1102 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
1105 sv_setpvn(TARG, "", 0);
1111 /* This code tries to decide if "$left .. $right" should use the
1112 magical string increment, or if the range is numeric (we make
1113 an exception for .."0" [#18165]). AMS 20021031. */
1115 #define RANGE_IS_NUMERIC(left,right) ( \
1116 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1117 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
1118 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
1119 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
1120 && (!SvOK(right) || looks_like_number(right))))
1126 if (GIMME == G_ARRAY) {
1129 if (SvGMAGICAL(left))
1131 if (SvGMAGICAL(right))
1134 if (RANGE_IS_NUMERIC(left,right)) {
1137 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1138 (SvOK(right) && SvNV(right) > IV_MAX))
1139 DIE(aTHX_ "Range iterator outside integer range");
1150 SV * const sv = sv_2mortal(newSViv(i++));
1155 SV *final = sv_mortalcopy(right);
1157 const char *tmps = SvPV_const(final, len);
1159 SV *sv = sv_mortalcopy(left);
1160 SvPV_force_nolen(sv);
1161 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
1163 if (strEQ(SvPVX_const(sv),tmps))
1165 sv = sv_2mortal(newSVsv(sv));
1172 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
1176 if (PL_op->op_private & OPpFLIP_LINENUM) {
1177 if (GvIO(PL_last_in_gv)) {
1178 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1181 GV * const gv = gv_fetchpv(".", TRUE, SVt_PV);
1182 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1190 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
1191 sv_catpvn(targ, "E0", 2);
1201 static const char * const context_name[] = {
1212 S_dopoptolabel(pTHX_ const char *label)
1216 for (i = cxstack_ix; i >= 0; i--) {
1217 register const PERL_CONTEXT * const cx = &cxstack[i];
1218 switch (CxTYPE(cx)) {
1224 if (ckWARN(WARN_EXITING))
1225 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1226 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1227 if (CxTYPE(cx) == CXt_NULL)
1231 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
1232 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
1233 (long)i, cx->blk_loop.label));
1236 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
1244 Perl_dowantarray(pTHX)
1246 const I32 gimme = block_gimme();
1247 return (gimme == G_VOID) ? G_SCALAR : gimme;
1251 Perl_block_gimme(pTHX)
1253 const I32 cxix = dopoptosub(cxstack_ix);
1257 switch (cxstack[cxix].blk_gimme) {
1265 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
1272 Perl_is_lvalue_sub(pTHX)
1274 const I32 cxix = dopoptosub(cxstack_ix);
1275 assert(cxix >= 0); /* We should only be called from inside subs */
1277 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1278 return cxstack[cxix].blk_sub.lval;
1284 S_dopoptosub(pTHX_ I32 startingblock)
1286 return dopoptosub_at(cxstack, startingblock);
1290 S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
1293 for (i = startingblock; i >= 0; i--) {
1294 register const PERL_CONTEXT * const cx = &cxstk[i];
1295 switch (CxTYPE(cx)) {
1301 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
1309 S_dopoptoeval(pTHX_ I32 startingblock)
1312 for (i = startingblock; i >= 0; i--) {
1313 register const PERL_CONTEXT *cx = &cxstack[i];
1314 switch (CxTYPE(cx)) {
1318 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
1326 S_dopoptoloop(pTHX_ I32 startingblock)
1329 for (i = startingblock; i >= 0; i--) {
1330 register const PERL_CONTEXT * const cx = &cxstack[i];
1331 switch (CxTYPE(cx)) {
1337 if (ckWARN(WARN_EXITING))
1338 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1339 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1340 if ((CxTYPE(cx)) == CXt_NULL)
1344 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
1352 Perl_dounwind(pTHX_ I32 cxix)
1356 while (cxstack_ix > cxix) {
1358 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1359 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
1360 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
1361 /* Note: we don't need to restore the base context info till the end. */
1362 switch (CxTYPE(cx)) {
1365 continue; /* not break */
1384 PERL_UNUSED_VAR(optype);
1388 Perl_qerror(pTHX_ SV *err)
1391 sv_catsv(ERRSV, err);
1393 sv_catsv(PL_errors, err);
1395 Perl_warn(aTHX_ "%"SVf, err);
1400 Perl_die_where(pTHX_ const char *message, STRLEN msglen)
1409 if (PL_in_eval & EVAL_KEEPERR) {
1410 static const char prefix[] = "\t(in cleanup) ";
1412 const char *e = Nullch;
1414 sv_setpvn(err,"",0);
1415 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
1417 e = SvPV_const(err, len);
1419 if (*e != *message || strNE(e,message))
1423 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1424 sv_catpvn(err, prefix, sizeof(prefix)-1);
1425 sv_catpvn(err, message, msglen);
1426 if (ckWARN(WARN_MISC)) {
1427 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
1428 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
1433 sv_setpvn(ERRSV, message, msglen);
1437 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1438 && PL_curstackinfo->si_prev)
1446 register PERL_CONTEXT *cx;
1449 if (cxix < cxstack_ix)
1452 POPBLOCK(cx,PL_curpm);
1453 if (CxTYPE(cx) != CXt_EVAL) {
1455 message = SvPVx_const(ERRSV, msglen);
1456 PerlIO_write(Perl_error_log, "panic: die ", 11);
1457 PerlIO_write(Perl_error_log, message, msglen);
1462 if (gimme == G_SCALAR)
1463 *++newsp = &PL_sv_undef;
1464 PL_stack_sp = newsp;
1468 /* LEAVE could clobber PL_curcop (see save_re_context())
1469 * XXX it might be better to find a way to avoid messing with
1470 * PL_curcop in save_re_context() instead, but this is a more
1471 * minimal fix --GSAR */
1472 PL_curcop = cx->blk_oldcop;
1474 if (optype == OP_REQUIRE) {
1475 const char* msg = SvPVx_nolen_const(ERRSV);
1476 SV * const nsv = cx->blk_eval.old_namesv;
1477 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
1479 DIE(aTHX_ "%sCompilation failed in require",
1480 *msg ? msg : "Unknown error\n");
1482 assert(CxTYPE(cx) == CXt_EVAL);
1483 return cx->blk_eval.retop;
1487 message = SvPVx_const(ERRSV, msglen);
1489 write_to_stderr(message, msglen);
1498 if (SvTRUE(left) != SvTRUE(right))
1510 RETURNOP(cLOGOP->op_other);
1519 RETURNOP(cLOGOP->op_other);
1528 if (!sv || !SvANY(sv)) {
1529 RETURNOP(cLOGOP->op_other);
1532 switch (SvTYPE(sv)) {
1534 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
1538 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
1542 if (CvROOT(sv) || CvXSUB(sv))
1552 RETURNOP(cLOGOP->op_other);
1558 register I32 cxix = dopoptosub(cxstack_ix);
1559 register const PERL_CONTEXT *cx;
1560 register const PERL_CONTEXT *ccstack = cxstack;
1561 const PERL_SI *top_si = PL_curstackinfo;
1563 const char *stashname;
1570 /* we may be in a higher stacklevel, so dig down deeper */
1571 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1572 top_si = top_si->si_prev;
1573 ccstack = top_si->si_cxstack;
1574 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1577 if (GIMME != G_ARRAY) {
1583 /* caller() should not report the automatic calls to &DB::sub */
1584 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
1585 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
1589 cxix = dopoptosub_at(ccstack, cxix - 1);
1592 cx = &ccstack[cxix];
1593 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1594 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
1595 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
1596 field below is defined for any cx. */
1597 /* caller() should not report the automatic calls to &DB::sub */
1598 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
1599 cx = &ccstack[dbcxix];
1602 stashname = CopSTASHPV(cx->blk_oldcop);
1603 if (GIMME != G_ARRAY) {
1606 PUSHs(&PL_sv_undef);
1609 sv_setpv(TARG, stashname);
1618 PUSHs(&PL_sv_undef);
1620 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
1621 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
1622 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
1625 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1626 GV *cvgv = CvGV(ccstack[cxix].blk_sub.cv);
1627 /* So is ccstack[dbcxix]. */
1629 SV * const sv = NEWSV(49, 0);
1630 gv_efullname3(sv, cvgv, Nullch);
1631 PUSHs(sv_2mortal(sv));
1632 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1635 PUSHs(sv_2mortal(newSVpvn("(unknown)",9)));
1636 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1640 PUSHs(sv_2mortal(newSVpvn("(eval)",6)));
1641 PUSHs(sv_2mortal(newSViv(0)));
1643 gimme = (I32)cx->blk_gimme;
1644 if (gimme == G_VOID)
1645 PUSHs(&PL_sv_undef);
1647 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
1648 if (CxTYPE(cx) == CXt_EVAL) {
1650 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1651 PUSHs(cx->blk_eval.cur_text);
1655 else if (cx->blk_eval.old_namesv) {
1656 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
1659 /* eval BLOCK (try blocks have old_namesv == 0) */
1661 PUSHs(&PL_sv_undef);
1662 PUSHs(&PL_sv_undef);
1666 PUSHs(&PL_sv_undef);
1667 PUSHs(&PL_sv_undef);
1669 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
1670 && CopSTASH_eq(PL_curcop, PL_debstash))
1672 AV * const ary = cx->blk_sub.argarray;
1673 const int off = AvARRAY(ary) - AvALLOC(ary);
1677 PL_dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1680 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
1683 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1684 av_extend(PL_dbargs, AvFILLp(ary) + off);
1685 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1686 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
1688 /* XXX only hints propagated via op_private are currently
1689 * visible (others are not easily accessible, since they
1690 * use the global PL_hints) */
1691 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
1692 HINT_PRIVATE_MASK)));
1695 SV * old_warnings = cx->blk_oldcop->cop_warnings ;
1697 if (old_warnings == pWARN_NONE ||
1698 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
1699 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
1700 else if (old_warnings == pWARN_ALL ||
1701 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1702 /* Get the bit mask for $warnings::Bits{all}, because
1703 * it could have been extended by warnings::register */
1705 HV *bits = get_hv("warnings::Bits", FALSE);
1706 if (bits && (bits_all=hv_fetch(bits, "all", 3, FALSE))) {
1707 mask = newSVsv(*bits_all);
1710 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1714 mask = newSVsv(old_warnings);
1715 PUSHs(sv_2mortal(mask));
1729 sv_reset(tmps, CopSTASH(PL_curcop));
1739 /* like pp_nextstate, but used instead when the debugger is active */
1744 PL_curcop = (COP*)PL_op;
1745 TAINT_NOT; /* Each statement is presumed innocent */
1746 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
1749 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1750 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
1754 register PERL_CONTEXT *cx;
1755 const I32 gimme = G_ARRAY;
1762 DIE(aTHX_ "No DB::DB routine defined");
1764 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1765 /* don't do recursive DB::DB call */
1777 PUSHBLOCK(cx, CXt_SUB, SP);
1779 cx->blk_sub.retop = PL_op->op_next;
1782 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1783 RETURNOP(CvSTART(cv));
1797 register PERL_CONTEXT *cx;
1798 const I32 gimme = GIMME_V;
1800 U32 cxtype = CXt_LOOP;
1808 if (PL_op->op_targ) {
1809 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1810 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1811 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1812 SVs_PADSTALE, SVs_PADSTALE);
1814 #ifndef USE_ITHREADS
1815 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
1818 SAVEPADSV(PL_op->op_targ);
1819 iterdata = INT2PTR(void*, PL_op->op_targ);
1820 cxtype |= CXp_PADVAR;
1825 svp = &GvSV(gv); /* symbol table variable */
1826 SAVEGENERICSV(*svp);
1829 iterdata = (void*)gv;
1835 PUSHBLOCK(cx, cxtype, SP);
1837 PUSHLOOP(cx, iterdata, MARK);
1839 PUSHLOOP(cx, svp, MARK);
1841 if (PL_op->op_flags & OPf_STACKED) {
1842 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1843 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1845 SV *right = (SV*)cx->blk_loop.iterary;
1846 if (RANGE_IS_NUMERIC(sv,right)) {
1847 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1848 (SvOK(right) && SvNV(right) >= IV_MAX))
1849 DIE(aTHX_ "Range iterator outside integer range");
1850 cx->blk_loop.iterix = SvIV(sv);
1851 cx->blk_loop.itermax = SvIV(right);
1854 cx->blk_loop.iterlval = newSVsv(sv);
1855 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
1856 (void) SvPV_nolen_const(right);
1859 else if (PL_op->op_private & OPpITER_REVERSED) {
1860 cx->blk_loop.itermax = -1;
1861 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary);
1866 cx->blk_loop.iterary = PL_curstack;
1867 AvFILLp(PL_curstack) = SP - PL_stack_base;
1868 if (PL_op->op_private & OPpITER_REVERSED) {
1869 cx->blk_loop.itermax = MARK - PL_stack_base;
1870 cx->blk_loop.iterix = cx->blk_oldsp;
1873 cx->blk_loop.iterix = MARK - PL_stack_base;
1883 register PERL_CONTEXT *cx;
1884 const I32 gimme = GIMME_V;
1890 PUSHBLOCK(cx, CXt_LOOP, SP);
1891 PUSHLOOP(cx, 0, SP);
1899 register PERL_CONTEXT *cx;
1906 assert(CxTYPE(cx) == CXt_LOOP);
1908 newsp = PL_stack_base + cx->blk_loop.resetsp;
1911 if (gimme == G_VOID)
1913 else if (gimme == G_SCALAR) {
1915 *++newsp = sv_mortalcopy(*SP);
1917 *++newsp = &PL_sv_undef;
1921 *++newsp = sv_mortalcopy(*++mark);
1922 TAINT_NOT; /* Each item is independent */
1928 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
1929 PL_curpm = newpm; /* ... and pop $1 et al */
1941 register PERL_CONTEXT *cx;
1942 bool popsub2 = FALSE;
1943 bool clear_errsv = FALSE;
1951 if (PL_curstackinfo->si_type == PERLSI_SORT) {
1952 if (cxstack_ix == PL_sortcxix
1953 || dopoptosub(cxstack_ix) <= PL_sortcxix)
1955 if (cxstack_ix > PL_sortcxix)
1956 dounwind(PL_sortcxix);
1957 AvARRAY(PL_curstack)[1] = *SP;
1958 PL_stack_sp = PL_stack_base + 1;
1963 cxix = dopoptosub(cxstack_ix);
1965 DIE(aTHX_ "Can't return outside a subroutine");
1966 if (cxix < cxstack_ix)
1970 switch (CxTYPE(cx)) {
1973 retop = cx->blk_sub.retop;
1974 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
1977 if (!(PL_in_eval & EVAL_KEEPERR))
1980 retop = cx->blk_eval.retop;
1984 if (optype == OP_REQUIRE &&
1985 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1987 /* Unassume the success we assumed earlier. */
1988 SV * const nsv = cx->blk_eval.old_namesv;
1989 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
1990 DIE(aTHX_ "%"SVf" did not return a true value", nsv);
1995 retop = cx->blk_sub.retop;
1998 DIE(aTHX_ "panic: return");
2002 if (gimme == G_SCALAR) {
2005 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
2007 *++newsp = SvREFCNT_inc(*SP);
2012 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
2014 *++newsp = sv_mortalcopy(sv);
2019 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
2022 *++newsp = sv_mortalcopy(*SP);
2025 *++newsp = &PL_sv_undef;
2027 else if (gimme == G_ARRAY) {
2028 while (++MARK <= SP) {
2029 *++newsp = (popsub2 && SvTEMP(*MARK))
2030 ? *MARK : sv_mortalcopy(*MARK);
2031 TAINT_NOT; /* Each item is independent */
2034 PL_stack_sp = newsp;
2037 /* Stack values are safe: */
2040 POPSUB(cx,sv); /* release CV and @_ ... */
2044 PL_curpm = newpm; /* ... and pop $1 et al */
2048 sv_setpvn(ERRSV,"",0);
2056 register PERL_CONTEXT *cx;
2067 if (PL_op->op_flags & OPf_SPECIAL) {
2068 cxix = dopoptoloop(cxstack_ix);
2070 DIE(aTHX_ "Can't \"last\" outside a loop block");
2073 cxix = dopoptolabel(cPVOP->op_pv);
2075 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
2077 if (cxix < cxstack_ix)
2081 cxstack_ix++; /* temporarily protect top context */
2083 switch (CxTYPE(cx)) {
2086 newsp = PL_stack_base + cx->blk_loop.resetsp;
2087 nextop = cx->blk_loop.last_op->op_next;
2091 nextop = cx->blk_sub.retop;
2095 nextop = cx->blk_eval.retop;
2099 nextop = cx->blk_sub.retop;
2102 DIE(aTHX_ "panic: last");
2106 if (gimme == G_SCALAR) {
2108 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2109 ? *SP : sv_mortalcopy(*SP);
2111 *++newsp = &PL_sv_undef;
2113 else if (gimme == G_ARRAY) {
2114 while (++MARK <= SP) {
2115 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2116 ? *MARK : sv_mortalcopy(*MARK);
2117 TAINT_NOT; /* Each item is independent */
2125 /* Stack values are safe: */
2128 POPLOOP(cx); /* release loop vars ... */
2132 POPSUB(cx,sv); /* release CV and @_ ... */
2135 PL_curpm = newpm; /* ... and pop $1 et al */
2138 PERL_UNUSED_VAR(optype);
2139 PERL_UNUSED_VAR(gimme);
2147 register PERL_CONTEXT *cx;
2150 if (PL_op->op_flags & OPf_SPECIAL) {
2151 cxix = dopoptoloop(cxstack_ix);
2153 DIE(aTHX_ "Can't \"next\" outside a loop block");
2156 cxix = dopoptolabel(cPVOP->op_pv);
2158 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
2160 if (cxix < cxstack_ix)
2163 /* clear off anything above the scope we're re-entering, but
2164 * save the rest until after a possible continue block */
2165 inner = PL_scopestack_ix;
2167 if (PL_scopestack_ix < inner)
2168 leave_scope(PL_scopestack[PL_scopestack_ix]);
2169 PL_curcop = cx->blk_oldcop;
2170 return cx->blk_loop.next_op;
2177 register PERL_CONTEXT *cx;
2181 if (PL_op->op_flags & OPf_SPECIAL) {
2182 cxix = dopoptoloop(cxstack_ix);
2184 DIE(aTHX_ "Can't \"redo\" outside a loop block");
2187 cxix = dopoptolabel(cPVOP->op_pv);
2189 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
2191 if (cxix < cxstack_ix)
2194 redo_op = cxstack[cxix].blk_loop.redo_op;
2195 if (redo_op->op_type == OP_ENTER) {
2196 /* pop one less context to avoid $x being freed in while (my $x..) */
2198 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2199 redo_op = redo_op->op_next;
2203 oldsave = PL_scopestack[PL_scopestack_ix - 1];
2204 LEAVE_SCOPE(oldsave);
2206 PL_curcop = cx->blk_oldcop;
2211 S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
2215 static const char too_deep[] = "Target of goto is too deeply nested";
2218 Perl_croak(aTHX_ too_deep);
2219 if (o->op_type == OP_LEAVE ||
2220 o->op_type == OP_SCOPE ||
2221 o->op_type == OP_LEAVELOOP ||
2222 o->op_type == OP_LEAVESUB ||
2223 o->op_type == OP_LEAVETRY)
2225 *ops++ = cUNOPo->op_first;
2227 Perl_croak(aTHX_ too_deep);
2230 if (o->op_flags & OPf_KIDS) {
2231 /* First try all the kids at this level, since that's likeliest. */
2232 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
2233 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2234 kCOP->cop_label && strEQ(kCOP->cop_label, label))
2237 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
2238 if (kid == PL_lastgotoprobe)
2240 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2243 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2244 ops[-1]->op_type == OP_DBSTATE)
2249 if ((o = dofindlabel(kid, label, ops, oplimit)))
2268 register PERL_CONTEXT *cx;
2269 #define GOTO_DEPTH 64
2270 OP *enterops[GOTO_DEPTH];
2271 const char *label = 0;
2272 const bool do_dump = (PL_op->op_type == OP_DUMP);
2273 static const char must_have_label[] = "goto must have label";
2275 if (PL_op->op_flags & OPf_STACKED) {
2276 SV * const sv = POPs;
2278 /* This egregious kludge implements goto &subroutine */
2279 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2281 register PERL_CONTEXT *cx;
2282 CV* cv = (CV*)SvRV(sv);
2289 if (!CvROOT(cv) && !CvXSUB(cv)) {
2290 const GV * const gv = CvGV(cv);
2294 /* autoloaded stub? */
2295 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2297 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2298 GvNAMELEN(gv), FALSE);
2299 if (autogv && (cv = GvCV(autogv)))
2301 tmpstr = sv_newmortal();
2302 gv_efullname3(tmpstr, gv, Nullch);
2303 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",tmpstr);
2305 DIE(aTHX_ "Goto undefined subroutine");
2308 /* First do some returnish stuff. */
2309 (void)SvREFCNT_inc(cv); /* avoid premature free during unwind */
2311 cxix = dopoptosub(cxstack_ix);
2313 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2314 if (cxix < cxstack_ix)
2318 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2319 if (CxTYPE(cx) == CXt_EVAL) {
2321 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2323 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2325 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
2326 /* put @_ back onto stack */
2327 AV* av = cx->blk_sub.argarray;
2329 items = AvFILLp(av) + 1;
2330 EXTEND(SP, items+1); /* @_ could have been extended. */
2331 Copy(AvARRAY(av), SP + 1, items, SV*);
2332 SvREFCNT_dec(GvAV(PL_defgv));
2333 GvAV(PL_defgv) = cx->blk_sub.savearray;
2335 /* abandon @_ if it got reified */
2340 av_extend(av, items-1);
2342 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
2345 else if (CvXSUB(cv)) { /* put GvAV(defgv) back onto stack */
2346 AV* const av = GvAV(PL_defgv);
2347 items = AvFILLp(av) + 1;
2348 EXTEND(SP, items+1); /* @_ could have been extended. */
2349 Copy(AvARRAY(av), SP + 1, items, SV*);
2353 if (CxTYPE(cx) == CXt_SUB &&
2354 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
2355 SvREFCNT_dec(cx->blk_sub.cv);
2356 oldsave = PL_scopestack[PL_scopestack_ix - 1];
2357 LEAVE_SCOPE(oldsave);
2359 /* Now do some callish stuff. */
2361 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
2363 OP* retop = cx->blk_sub.retop;
2366 for (index=0; index<items; index++)
2367 sv_2mortal(SP[-index]);
2369 #ifdef PERL_XSUB_OLDSTYLE
2370 if (CvOLDSTYLE(cv)) {
2371 I32 (*fp3)(int,int,int);
2376 fp3 = (I32(*)(int,int,int))CvXSUB(cv);
2377 items = (*fp3)(CvXSUBANY(cv).any_i32,
2378 mark - PL_stack_base + 1,
2380 SP = PL_stack_base + items;
2383 #endif /* PERL_XSUB_OLDSTYLE */
2388 /* XS subs don't have a CxSUB, so pop it */
2389 POPBLOCK(cx, PL_curpm);
2390 /* Push a mark for the start of arglist */
2393 (void)(*CvXSUB(cv))(aTHX_ cv);
2394 /* Put these at the bottom since the vars are set but not used */
2395 PERL_UNUSED_VAR(newsp);
2396 PERL_UNUSED_VAR(gimme);
2402 AV* padlist = CvPADLIST(cv);
2403 if (CxTYPE(cx) == CXt_EVAL) {
2404 PL_in_eval = cx->blk_eval.old_in_eval;
2405 PL_eval_root = cx->blk_eval.old_eval_root;
2406 cx->cx_type = CXt_SUB;
2407 cx->blk_sub.hasargs = 0;
2409 cx->blk_sub.cv = cv;
2410 cx->blk_sub.olddepth = (U16)CvDEPTH(cv);
2413 if (CvDEPTH(cv) < 2)
2414 (void)SvREFCNT_inc(cv);
2416 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
2417 sub_crush_depth(cv);
2418 pad_push(padlist, CvDEPTH(cv));
2421 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2422 if (cx->blk_sub.hasargs)
2424 AV* av = (AV*)PAD_SVl(0);
2427 cx->blk_sub.savearray = GvAV(PL_defgv);
2428 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
2429 CX_CURPAD_SAVE(cx->blk_sub);
2430 cx->blk_sub.argarray = av;
2432 if (items >= AvMAX(av) + 1) {
2434 if (AvARRAY(av) != ary) {
2435 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2436 SvPV_set(av, (char*)ary);
2438 if (items >= AvMAX(av) + 1) {
2439 AvMAX(av) = items - 1;
2440 Renew(ary,items+1,SV*);
2442 SvPV_set(av, (char*)ary);
2446 Copy(mark,AvARRAY(av),items,SV*);
2447 AvFILLp(av) = items - 1;
2448 assert(!AvREAL(av));
2450 /* transfer 'ownership' of refcnts to new @_ */
2460 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
2462 * We do not care about using sv to call CV;
2463 * it's for informational purposes only.
2465 SV * const sv = GvSV(PL_DBsub);
2469 if (PERLDB_SUB_NN) {
2470 const int type = SvTYPE(sv);
2471 if (type < SVt_PVIV && type != SVt_IV)
2472 sv_upgrade(sv, SVt_PVIV);
2474 SvIV_set(sv, PTR2IV(cv)); /* Do it the quickest way */
2476 gv_efullname3(sv, CvGV(cv), Nullch);
2479 && (gotocv = get_cv("DB::goto", FALSE)) ) {
2480 PUSHMARK( PL_stack_sp );
2481 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2485 RETURNOP(CvSTART(cv));
2489 label = SvPV_nolen_const(sv);
2490 if (!(do_dump || *label))
2491 DIE(aTHX_ must_have_label);
2494 else if (PL_op->op_flags & OPf_SPECIAL) {
2496 DIE(aTHX_ must_have_label);
2499 label = cPVOP->op_pv;
2501 if (label && *label) {
2503 bool leaving_eval = FALSE;
2504 bool in_block = FALSE;
2505 PERL_CONTEXT *last_eval_cx = 0;
2509 PL_lastgotoprobe = 0;
2511 for (ix = cxstack_ix; ix >= 0; ix--) {
2513 switch (CxTYPE(cx)) {
2515 leaving_eval = TRUE;
2516 if (!CxTRYBLOCK(cx)) {
2517 gotoprobe = (last_eval_cx ?
2518 last_eval_cx->blk_eval.old_eval_root :
2523 /* else fall through */
2525 gotoprobe = cx->blk_oldcop->op_sibling;
2531 gotoprobe = cx->blk_oldcop->op_sibling;
2534 gotoprobe = PL_main_root;
2537 if (CvDEPTH(cx->blk_sub.cv)) {
2538 gotoprobe = CvROOT(cx->blk_sub.cv);
2544 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
2547 DIE(aTHX_ "panic: goto");
2548 gotoprobe = PL_main_root;
2552 retop = dofindlabel(gotoprobe, label,
2553 enterops, enterops + GOTO_DEPTH);
2557 PL_lastgotoprobe = gotoprobe;
2560 DIE(aTHX_ "Can't find label %s", label);
2562 /* if we're leaving an eval, check before we pop any frames
2563 that we're not going to punt, otherwise the error
2566 if (leaving_eval && *enterops && enterops[1]) {
2568 for (i = 1; enterops[i]; i++)
2569 if (enterops[i]->op_type == OP_ENTERITER)
2570 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2573 /* pop unwanted frames */
2575 if (ix < cxstack_ix) {
2582 oldsave = PL_scopestack[PL_scopestack_ix];
2583 LEAVE_SCOPE(oldsave);
2586 /* push wanted frames */
2588 if (*enterops && enterops[1]) {
2590 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2591 for (; enterops[ix]; ix++) {
2592 PL_op = enterops[ix];
2593 /* Eventually we may want to stack the needed arguments
2594 * for each op. For now, we punt on the hard ones. */
2595 if (PL_op->op_type == OP_ENTERITER)
2596 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2597 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
2605 if (!retop) retop = PL_main_start;
2607 PL_restartop = retop;
2608 PL_do_undump = TRUE;
2612 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2613 PL_do_undump = FALSE;
2629 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
2631 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
2634 PL_exit_flags |= PERL_EXIT_EXPECTED;
2636 PUSHs(&PL_sv_undef);
2644 const NV value = SvNVx(GvSV(cCOP->cop_gv));
2645 register I32 match = I_32(value);
2648 if (((NV)match) > value)
2649 --match; /* was fractional--truncate other way */
2651 match -= cCOP->uop.scop.scop_offset;
2654 else if (match > cCOP->uop.scop.scop_max)
2655 match = cCOP->uop.scop.scop_max;
2656 PL_op = cCOP->uop.scop.scop_next[match];
2666 PL_op = PL_op->op_next; /* can't assume anything */
2668 match = *(SvPVx_nolen_const(GvSV(cCOP->cop_gv))) & 255;
2669 match -= cCOP->uop.scop.scop_offset;
2672 else if (match > cCOP->uop.scop.scop_max)
2673 match = cCOP->uop.scop.scop_max;
2674 PL_op = cCOP->uop.scop.scop_next[match];
2683 S_save_lines(pTHX_ AV *array, SV *sv)
2685 const char *s = SvPVX_const(sv);
2686 const char * const send = SvPVX_const(sv) + SvCUR(sv);
2689 while (s && s < send) {
2691 SV * const tmpstr = NEWSV(85,0);
2693 sv_upgrade(tmpstr, SVt_PVMG);
2694 t = strchr(s, '\n');
2700 sv_setpvn(tmpstr, s, t - s);
2701 av_store(array, line++, tmpstr);
2707 S_docatch_body(pTHX)
2714 S_docatch(pTHX_ OP *o)
2717 OP * const oldop = PL_op;
2721 assert(CATCH_GET == TRUE);
2728 assert(cxstack_ix >= 0);
2729 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2730 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
2735 /* die caught by an inner eval - continue inner loop */
2737 /* NB XXX we rely on the old popped CxEVAL still being at the top
2738 * of the stack; the way die_where() currently works, this
2739 * assumption is valid. In theory The cur_top_env value should be
2740 * returned in another global, the way retop (aka PL_restartop)
2742 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2745 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2747 PL_op = PL_restartop;
2764 Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
2765 /* sv Text to convert to OP tree. */
2766 /* startop op_free() this to undo. */
2767 /* code Short string id of the caller. */
2769 dVAR; dSP; /* Make POPBLOCK work. */
2776 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2777 char *tmpbuf = tbuf;
2780 CV* runcv = Nullcv; /* initialise to avoid compiler warnings */
2785 /* switch to eval mode */
2787 if (IN_PERL_COMPILETIME) {
2788 SAVECOPSTASH_FREE(&PL_compiling);
2789 CopSTASH_set(&PL_compiling, PL_curstash);
2791 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
2792 SV * const sv = sv_newmortal();
2793 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2794 code, (unsigned long)++PL_evalseq,
2795 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2799 sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
2800 SAVECOPFILE_FREE(&PL_compiling);
2801 CopFILE_set(&PL_compiling, tmpbuf+2);
2802 SAVECOPLINE(&PL_compiling);
2803 CopLINE_set(&PL_compiling, 1);
2804 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2805 deleting the eval's FILEGV from the stash before gv_check() runs
2806 (i.e. before run-time proper). To work around the coredump that
2807 ensues, we always turn GvMULTI_on for any globals that were
2808 introduced within evals. See force_ident(). GSAR 96-10-12 */
2809 safestr = savepv(tmpbuf);
2810 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
2812 #ifdef OP_IN_REGISTER
2818 /* we get here either during compilation, or via pp_regcomp at runtime */
2819 runtime = IN_PERL_RUNTIME;
2821 runcv = find_runcv(NULL);
2824 PL_op->op_type = OP_ENTEREVAL;
2825 PL_op->op_flags = 0; /* Avoid uninit warning. */
2826 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
2827 PUSHEVAL(cx, 0, Nullgv);
2830 rop = doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
2832 rop = doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
2833 POPBLOCK(cx,PL_curpm);
2836 (*startop)->op_type = OP_NULL;
2837 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
2839 /* XXX DAPM do this properly one year */
2840 *padp = (AV*)SvREFCNT_inc(PL_comppad);
2842 if (IN_PERL_COMPILETIME)
2843 PL_compiling.op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);
2844 #ifdef OP_IN_REGISTER
2847 PERL_UNUSED_VAR(newsp);
2848 PERL_UNUSED_VAR(optype);
2855 =for apidoc find_runcv
2857 Locate the CV corresponding to the currently executing sub or eval.
2858 If db_seqp is non_null, skip CVs that are in the DB package and populate
2859 *db_seqp with the cop sequence number at the point that the DB:: code was
2860 entered. (allows debuggers to eval in the scope of the breakpoint rather
2861 than in in the scope of the debugger itself).
2867 Perl_find_runcv(pTHX_ U32 *db_seqp)
2872 *db_seqp = PL_curcop->cop_seq;
2873 for (si = PL_curstackinfo; si; si = si->si_prev) {
2875 for (ix = si->si_cxix; ix >= 0; ix--) {
2876 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
2877 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
2878 CV * const cv = cx->blk_sub.cv;
2879 /* skip DB:: code */
2880 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2881 *db_seqp = cx->blk_oldcop->cop_seq;
2886 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2894 /* Compile a require/do, an eval '', or a /(?{...})/.
2895 * In the last case, startop is non-null, and contains the address of
2896 * a pointer that should be set to the just-compiled code.
2897 * outside is the lexically enclosing CV (if any) that invoked us.
2900 /* With USE_5005THREADS, eval_owner must be held on entry to doeval */
2902 S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
2905 OP * const saveop = PL_op;
2907 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2908 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2913 SAVESPTR(PL_compcv);
2914 PL_compcv = (CV*)NEWSV(1104,0);
2915 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2916 CvEVAL_on(PL_compcv);
2917 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2918 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2920 CvOUTSIDE_SEQ(PL_compcv) = seq;
2921 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outside);
2923 /* set up a scratch pad */
2925 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
2928 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
2930 /* make sure we compile in the right package */
2932 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
2933 SAVESPTR(PL_curstash);
2934 PL_curstash = CopSTASH(PL_curcop);
2936 SAVESPTR(PL_beginav);
2937 PL_beginav = newAV();
2938 SAVEFREESV(PL_beginav);
2939 SAVEI32(PL_error_count);
2941 /* try to compile it */
2943 PL_eval_root = Nullop;
2945 PL_curcop = &PL_compiling;
2946 PL_curcop->cop_arybase = 0;
2947 if (saveop && saveop->op_flags & OPf_SPECIAL)
2948 PL_in_eval |= EVAL_KEEPERR;
2950 sv_setpvn(ERRSV,"",0);
2951 if (yyparse() || PL_error_count || !PL_eval_root) {
2952 SV **newsp; /* Used by POPBLOCK. */
2953 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
2954 I32 optype = 0; /* Might be reset by POPEVAL. */
2959 op_free(PL_eval_root);
2960 PL_eval_root = Nullop;
2962 SP = PL_stack_base + POPMARK; /* pop original mark */
2964 POPBLOCK(cx,PL_curpm);
2970 msg = SvPVx_nolen_const(ERRSV);
2971 if (optype == OP_REQUIRE) {
2972 const SV * const nsv = cx->blk_eval.old_namesv;
2973 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
2975 DIE(aTHX_ "%sCompilation failed in require",
2976 *msg ? msg : "Unknown error\n");
2979 POPBLOCK(cx,PL_curpm);
2981 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2982 (*msg ? msg : "Unknown error\n"));
2986 sv_setpv(ERRSV, "Compilation error");
2989 PERL_UNUSED_VAR(newsp);
2992 CopLINE_set(&PL_compiling, 0);
2994 *startop = PL_eval_root;
2996 SAVEFREEOP(PL_eval_root);
2998 /* Set the context for this new optree.
2999 * If the last op is an OP_REQUIRE, force scalar context.
3000 * Otherwise, propagate the context from the eval(). */
3001 if (PL_eval_root->op_type == OP_LEAVEEVAL
3002 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3003 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3005 scalar(PL_eval_root);
3006 else if (gimme & G_VOID)
3007 scalarvoid(PL_eval_root);
3008 else if (gimme & G_ARRAY)
3011 scalar(PL_eval_root);
3013 DEBUG_x(dump_eval());
3015 /* Register with debugger: */
3016 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
3017 CV * const cv = get_cv("DB::postponed", FALSE);
3021 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3023 call_sv((SV*)cv, G_DISCARD);
3027 /* compiled okay, so do it */
3029 CvDEPTH(PL_compcv) = 1;
3030 SP = PL_stack_base + POPMARK; /* pop original mark */
3031 PL_op = saveop; /* The caller may need it. */
3032 PL_lex_state = LEX_NOTPARSING; /* $^S needs this. */
3034 RETURNOP(PL_eval_start);
3038 S_doopen_pm(pTHX_ const char *name, const char *mode)
3040 #ifndef PERL_DISABLE_PMC
3041 const STRLEN namelen = strlen(name);
3044 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
3045 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
3046 const char * const pmc = SvPV_nolen_const(pmcsv);
3048 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
3049 fp = PerlIO_open(name, mode);
3053 if (PerlLIO_stat(name, &pmstat) < 0 ||
3054 pmstat.st_mtime < pmcstat.st_mtime)
3056 fp = PerlIO_open(pmc, mode);
3059 fp = PerlIO_open(name, mode);
3062 SvREFCNT_dec(pmcsv);
3065 fp = PerlIO_open(name, mode);
3069 return PerlIO_open(name, mode);
3070 #endif /* !PERL_DISABLE_PMC */
3076 register PERL_CONTEXT *cx;
3080 const char *tryname = Nullch;
3081 SV *namesv = Nullsv;
3083 const I32 gimme = GIMME_V;
3084 PerlIO *tryrsfp = 0;
3085 int filter_has_file = 0;
3086 GV *filter_child_proc = 0;
3087 SV *filter_state = 0;
3094 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3095 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
3096 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
3097 "v-string in use/require non-portable");
3099 sv = new_version(sv);
3100 if (!sv_derived_from(PL_patchlevel, "version"))
3101 (void *)upg_version(PL_patchlevel);
3102 if ( vcmp(sv,PL_patchlevel) > 0 )
3103 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
3104 vnormal(sv), vnormal(PL_patchlevel));
3108 name = SvPV_const(sv, len);
3109 if (!(name && len > 0 && *name))
3110 DIE(aTHX_ "Null filename used");
3111 TAINT_PROPER("require");
3112 if (PL_op->op_type == OP_REQUIRE &&
3113 (svp = hv_fetch(GvHVn(PL_incgv), name, len, 0))) {
3114 if (*svp != &PL_sv_undef)
3117 DIE(aTHX_ "Compilation failed in require");
3120 /* prepare to compile file */
3122 if (path_is_absolute(name)) {
3124 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
3126 #ifdef MACOS_TRADITIONAL
3130 MacPerl_CanonDir(name, newname, 1);
3131 if (path_is_absolute(newname)) {
3133 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
3138 AV *ar = GvAVn(PL_incgv);
3142 if ((unixname = tounixspec(name, Nullch)) != Nullch)
3145 namesv = NEWSV(806, 0);
3146 for (i = 0; i <= AvFILL(ar); i++) {
3147 SV *dirsv = *av_fetch(ar, i, TRUE);
3153 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3154 && !sv_isobject(loader))
3156 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3159 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
3160 PTR2UV(SvRV(dirsv)), name);
3161 tryname = SvPVX_const(namesv);
3172 if (sv_isobject(loader))
3173 count = call_method("INC", G_ARRAY);
3175 count = call_sv(loader, G_ARRAY);
3185 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3189 if (SvTYPE(arg) == SVt_PVGV) {
3190 IO *io = GvIO((GV *)arg);
3195 tryrsfp = IoIFP(io);
3196 if (IoTYPE(io) == IoTYPE_PIPE) {
3197 /* reading from a child process doesn't
3198 nest -- when returning from reading
3199 the inner module, the outer one is
3200 unreadable (closed?) I've tried to
3201 save the gv to manage the lifespan of
3202 the pipe, but this didn't help. XXX */
3203 filter_child_proc = (GV *)arg;
3204 (void)SvREFCNT_inc(filter_child_proc);
3207 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3208 PerlIO_close(IoOFP(io));
3220 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3222 (void)SvREFCNT_inc(filter_sub);
3225 filter_state = SP[i];
3226 (void)SvREFCNT_inc(filter_state);
3230 tryrsfp = PerlIO_open("/dev/null",
3246 filter_has_file = 0;
3247 if (filter_child_proc) {
3248 SvREFCNT_dec(filter_child_proc);
3249 filter_child_proc = 0;
3252 SvREFCNT_dec(filter_state);
3256 SvREFCNT_dec(filter_sub);
3261 if (!path_is_absolute(name)
3262 #ifdef MACOS_TRADITIONAL
3263 /* We consider paths of the form :a:b ambiguous and interpret them first
3264 as global then as local
3266 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3269 const char *dir = SvPVx_nolen_const(dirsv);
3270 #ifdef MACOS_TRADITIONAL
3274 MacPerl_CanonDir(name, buf2, 1);
3275 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
3279 if ((unixdir = tounixpath(dir, Nullch)) == Nullch)
3281 sv_setpv(namesv, unixdir);
3282 sv_catpv(namesv, unixname);
3285 if (PL_origfilename[0] &&
3286 PL_origfilename[1] == ':' &&
3287 !(dir[0] && dir[1] == ':'))
3288 Perl_sv_setpvf(aTHX_ namesv,
3293 Perl_sv_setpvf(aTHX_ namesv,
3297 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
3301 TAINT_PROPER("require");
3302 tryname = SvPVX_const(namesv);
3303 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
3305 if (tryname[0] == '.' && tryname[1] == '/')
3314 SAVECOPFILE_FREE(&PL_compiling);
3315 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
3316 SvREFCNT_dec(namesv);
3318 if (PL_op->op_type == OP_REQUIRE) {
3319 const char *msgstr = name;
3320 if (namesv) { /* did we lookup @INC? */
3321 SV *msg = sv_2mortal(newSVpv(msgstr,0));
3322 SV *dirmsgsv = NEWSV(0, 0);
3323 AV *ar = GvAVn(PL_incgv);
3325 sv_catpvn(msg, " in @INC", 8);
3326 if (instr(SvPVX_const(msg), ".h "))
3327 sv_catpv(msg, " (change .h to .ph maybe?)");
3328 if (instr(SvPVX_const(msg), ".ph "))
3329 sv_catpv(msg, " (did you run h2ph?)");
3330 sv_catpv(msg, " (@INC contains:");
3331 for (i = 0; i <= AvFILL(ar); i++) {
3332 const char *dir = SvPVx_nolen_const(*av_fetch(ar, i, TRUE));
3333 Perl_sv_setpvf(aTHX_ dirmsgsv, " %s", dir);
3334 sv_catsv(msg, dirmsgsv);
3336 sv_catpvn(msg, ")", 1);
3337 SvREFCNT_dec(dirmsgsv);
3338 msgstr = SvPV_nolen_const(msg);
3340 DIE(aTHX_ "Can't locate %s", msgstr);
3346 SETERRNO(0, SS_NORMAL);
3348 /* Assume success here to prevent recursive requirement. */
3350 /* Check whether a hook in @INC has already filled %INC */
3351 if (!hook_sv || !(svp = hv_fetch(GvHVn(PL_incgv), name, len, 0))) {
3352 (void)hv_store(GvHVn(PL_incgv), name, len,
3353 (hook_sv ? SvREFCNT_inc(hook_sv)
3354 : newSVpv(CopFILE(&PL_compiling), 0)),
3360 lex_start(sv_2mortal(newSVpvn("",0)));
3361 SAVEGENERICSV(PL_rsfp_filters);
3362 PL_rsfp_filters = Nullav;
3367 SAVESPTR(PL_compiling.cop_warnings);
3368 if (PL_dowarn & G_WARN_ALL_ON)
3369 PL_compiling.cop_warnings = pWARN_ALL ;
3370 else if (PL_dowarn & G_WARN_ALL_OFF)
3371 PL_compiling.cop_warnings = pWARN_NONE ;
3372 else if (PL_taint_warn)
3373 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
3375 PL_compiling.cop_warnings = pWARN_STD ;
3376 SAVESPTR(PL_compiling.cop_io);
3377 PL_compiling.cop_io = Nullsv;
3379 if (filter_sub || filter_child_proc) {
3380 SV * const datasv = filter_add(run_user_filter, Nullsv);
3381 IoLINES(datasv) = filter_has_file;
3382 IoFMT_GV(datasv) = (GV *)filter_child_proc;
3383 IoTOP_GV(datasv) = (GV *)filter_state;
3384 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
3387 /* switch to eval mode */
3388 PUSHBLOCK(cx, CXt_EVAL, SP);
3389 PUSHEVAL(cx, name, Nullgv);
3390 cx->blk_eval.retop = PL_op->op_next;
3392 SAVECOPLINE(&PL_compiling);
3393 CopLINE_set(&PL_compiling, 0);
3397 /* Store and reset encoding. */
3398 encoding = PL_encoding;
3399 PL_encoding = Nullsv;
3401 op = DOCATCH(doeval(gimme, NULL, Nullcv, PL_curcop->cop_seq));
3403 /* Restore encoding. */
3404 PL_encoding = encoding;
3411 return pp_require();
3417 register PERL_CONTEXT *cx;
3419 const I32 gimme = GIMME_V;
3420 const I32 was = PL_sub_generation;
3421 char tbuf[TYPE_DIGITS(long) + 12];
3422 char *tmpbuf = tbuf;
3429 if (!SvPV_const(sv,len))
3431 TAINT_PROPER("eval");
3437 /* switch to eval mode */
3439 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
3440 SV * const sv = sv_newmortal();
3441 Perl_sv_setpvf(aTHX_ sv, "_<(eval %lu)[%s:%"IVdf"]",
3442 (unsigned long)++PL_evalseq,
3443 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
3447 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
3448 SAVECOPFILE_FREE(&PL_compiling);
3449 CopFILE_set(&PL_compiling, tmpbuf+2);
3450 SAVECOPLINE(&PL_compiling);
3451 CopLINE_set(&PL_compiling, 1);
3452 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3453 deleting the eval's FILEGV from the stash before gv_check() runs
3454 (i.e. before run-time proper). To work around the coredump that
3455 ensues, we always turn GvMULTI_on for any globals that were
3456 introduced within evals. See force_ident(). GSAR 96-10-12 */
3457 safestr = savepv(tmpbuf);
3458 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
3460 PL_hints = PL_op->op_targ;
3461 SAVESPTR(PL_compiling.cop_warnings);
3462 if (specialWARN(PL_curcop->cop_warnings))
3463 PL_compiling.cop_warnings = PL_curcop->cop_warnings;
3465 PL_compiling.cop_warnings = newSVsv(PL_curcop->cop_warnings);
3466 SAVEFREESV(PL_compiling.cop_warnings);
3468 SAVESPTR(PL_compiling.cop_io);
3469 if (specialCopIO(PL_curcop->cop_io))
3470 PL_compiling.cop_io = PL_curcop->cop_io;
3472 PL_compiling.cop_io = newSVsv(PL_curcop->cop_io);
3473 SAVEFREESV(PL_compiling.cop_io);
3475 /* special case: an eval '' executed within the DB package gets lexically
3476 * placed in the first non-DB CV rather than the current CV - this
3477 * allows the debugger to execute code, find lexicals etc, in the
3478 * scope of the code being debugged. Passing &seq gets find_runcv
3479 * to do the dirty work for us */
3480 runcv = find_runcv(&seq);
3482 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
3483 PUSHEVAL(cx, 0, Nullgv);
3484 cx->blk_eval.retop = PL_op->op_next;
3486 /* prepare to compile string */
3488 if (PERLDB_LINE && PL_curstash != PL_debstash)
3489 save_lines(CopFILEAV(&PL_compiling), PL_linestr);
3491 ret = doeval(gimme, NULL, runcv, seq);
3492 if (PERLDB_INTER && was != (I32)PL_sub_generation /* Some subs defined here. */
3493 && ret != PL_op->op_next) { /* Successive compilation. */
3494 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
3496 return DOCATCH(ret);
3506 register PERL_CONTEXT *cx;
3508 const U8 save_flags = PL_op -> op_flags;
3513 retop = cx->blk_eval.retop;
3516 if (gimme == G_VOID)
3518 else if (gimme == G_SCALAR) {
3521 if (SvFLAGS(TOPs) & SVs_TEMP)
3524 *MARK = sv_mortalcopy(TOPs);
3528 *MARK = &PL_sv_undef;
3533 /* in case LEAVE wipes old return values */
3534 for (mark = newsp + 1; mark <= SP; mark++) {
3535 if (!(SvFLAGS(*mark) & SVs_TEMP)) {
3536 *mark = sv_mortalcopy(*mark);
3537 TAINT_NOT; /* Each item is independent */
3541 PL_curpm = newpm; /* Don't pop $1 et al till now */
3544 assert(CvDEPTH(PL_compcv) == 1);
3546 CvDEPTH(PL_compcv) = 0;
3549 if (optype == OP_REQUIRE &&
3550 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
3552 /* Unassume the success we assumed earlier. */
3553 SV * const nsv = cx->blk_eval.old_namesv;
3554 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
3555 retop = Perl_die(aTHX_ "%"SVf" did not return a true value", nsv);
3556 /* die_where() did LEAVE, or we won't be here */
3560 if (!(save_flags & OPf_SPECIAL))
3561 sv_setpvn(ERRSV,"",0);
3570 register PERL_CONTEXT *cx;
3571 const I32 gimme = GIMME_V;
3576 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), SP);
3578 cx->blk_eval.retop = cLOGOP->op_other->op_next;
3580 PL_in_eval = EVAL_INEVAL;
3581 sv_setpvn(ERRSV,"",0);
3583 return DOCATCH(PL_op->op_next);
3593 register PERL_CONTEXT *cx;
3598 PERL_UNUSED_VAR(optype);
3601 if (gimme == G_VOID)
3603 else if (gimme == G_SCALAR) {
3606 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
3609 *MARK = sv_mortalcopy(TOPs);
3613 *MARK = &PL_sv_undef;
3618 /* in case LEAVE wipes old return values */
3619 for (mark = newsp + 1; mark <= SP; mark++) {
3620 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
3621 *mark = sv_mortalcopy(*mark);
3622 TAINT_NOT; /* Each item is independent */
3626 PL_curpm = newpm; /* Don't pop $1 et al till now */
3629 sv_setpvn(ERRSV,"",0);
3634 S_doparseform(pTHX_ SV *sv)
3637 register char *s = SvPV_force(sv, len);
3638 register char *send = s + len;
3639 register char *base = Nullch;
3640 register I32 skipspaces = 0;
3641 bool noblank = FALSE;
3642 bool repeat = FALSE;
3643 bool postspace = FALSE;
3649 bool unchopnum = FALSE;
3650 int maxops = 12; /* FF_LINEMARK + FF_END + 10 (\0 without preceding \n) */
3653 Perl_croak(aTHX_ "Null picture in formline");
3655 /* estimate the buffer size needed */
3656 for (base = s; s <= send; s++) {
3657 if (*s == '\n' || *s == '@' || *s == '^')
3663 Newx(fops, maxops, U32);
3668 *fpc++ = FF_LINEMARK;
3669 noblank = repeat = FALSE;
3687 case ' ': case '\t':
3694 } /* else FALL THROUGH */
3702 *fpc++ = FF_LITERAL;
3710 *fpc++ = (U16)skipspaces;
3714 *fpc++ = FF_NEWLINE;
3718 arg = fpc - linepc + 1;
3725 *fpc++ = FF_LINEMARK;
3726 noblank = repeat = FALSE;
3735 ischop = s[-1] == '^';
3741 arg = (s - base) - 1;
3743 *fpc++ = FF_LITERAL;
3751 *fpc++ = 2; /* skip the @* or ^* */
3753 *fpc++ = FF_LINESNGL;
3756 *fpc++ = FF_LINEGLOB;
3758 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
3759 arg = ischop ? 512 : 0;
3764 const char * const f = ++s;
3767 arg |= 256 + (s - f);
3769 *fpc++ = s - base; /* fieldsize for FETCH */
3770 *fpc++ = FF_DECIMAL;
3772 unchopnum |= ! ischop;
3774 else if (*s == '0' && s[1] == '#') { /* Zero padded decimals */
3775 arg = ischop ? 512 : 0;
3777 s++; /* skip the '0' first */
3781 const char * const f = ++s;
3784 arg |= 256 + (s - f);
3786 *fpc++ = s - base; /* fieldsize for FETCH */
3787 *fpc++ = FF_0DECIMAL;
3789 unchopnum |= ! ischop;
3793 bool ismore = FALSE;
3796 while (*++s == '>') ;
3797 prespace = FF_SPACE;
3799 else if (*s == '|') {
3800 while (*++s == '|') ;
3801 prespace = FF_HALFSPACE;
3806 while (*++s == '<') ;
3809 if (*s == '.' && s[1] == '.' && s[2] == '.') {
3813 *fpc++ = s - base; /* fieldsize for FETCH */
3815 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
3818 *fpc++ = (U16)prespace;
3832 assert (fpc <= fops + maxops); /* ensure our buffer estimate was valid */
3834 { /* need to jump to the next word */
3836 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
3837 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U32) + 4);
3838 s = SvPVX(sv) + SvCUR(sv) + z;
3840 Copy(fops, s, arg, U32);
3842 sv_magic(sv, Nullsv, PERL_MAGIC_fm, Nullch, 0);
3845 if (unchopnum && repeat)
3846 DIE(aTHX_ "Repeated format line will never terminate (~~ and @#)");
3852 S_num_overflow(NV value, I32 fldsize, I32 frcsize)
3854 /* Can value be printed in fldsize chars, using %*.*f ? */
3858 int intsize = fldsize - (value < 0 ? 1 : 0);
3865 while (intsize--) pwr *= 10.0;
3866 while (frcsize--) eps /= 10.0;
3869 if (value + eps >= pwr)
3872 if (value - eps <= -pwr)
3879 run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
3882 SV *datasv = FILTER_DATA(idx);
3883 const int filter_has_file = IoLINES(datasv);
3884 GV *filter_child_proc = (GV *)IoFMT_GV(datasv);
3885 SV *filter_state = (SV *)IoTOP_GV(datasv);
3886 SV *filter_sub = (SV *)IoBOTTOM_GV(datasv);
3889 /* I was having segfault trouble under Linux 2.2.5 after a
3890 parse error occured. (Had to hack around it with a test
3891 for PL_error_count == 0.) Solaris doesn't segfault --
3892 not sure where the trouble is yet. XXX */
3894 if (filter_has_file) {
3895 len = FILTER_READ(idx+1, buf_sv, maxlen);
3898 if (filter_sub && len >= 0) {
3909 PUSHs(sv_2mortal(newSViv(maxlen)));
3911 PUSHs(filter_state);
3914 count = call_sv(filter_sub, G_SCALAR);
3930 IoLINES(datasv) = 0;
3931 if (filter_child_proc) {
3932 SvREFCNT_dec(filter_child_proc);
3933 IoFMT_GV(datasv) = Nullgv;
3936 SvREFCNT_dec(filter_state);
3937 IoTOP_GV(datasv) = Nullgv;
3940 SvREFCNT_dec(filter_sub);
3941 IoBOTTOM_GV(datasv) = Nullgv;
3943 filter_del(run_user_filter);
3949 /* perhaps someone can come up with a better name for
3950 this? it is not really "absolute", per se ... */
3952 S_path_is_absolute(pTHX_ const char *name)
3954 if (PERL_FILE_IS_ABSOLUTE(name)
3955 #ifdef MACOS_TRADITIONAL
3958 || (*name == '.' && (name[1] == '/' ||
3959 (name[1] == '.' && name[2] == '/'))))
3970 * c-indentation-style: bsd
3972 * indent-tabs-mode: t
3975 * ex: set ts=8 sts=4 sw=4 noet: