3 * Copyright (c) 1991-1994, Larry Wall
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.
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.
23 #define WORD_ALIGN sizeof(U16)
26 static OP *doeval _((int gimme));
27 static OP *dofindlabel _((OP *op, char *label, OP **opstack));
28 static void doparseform _((SV *sv));
29 static I32 dopoptoeval _((I32 startingblock));
30 static I32 dopoptolabel _((char *label));
31 static I32 dopoptoloop _((I32 startingblock));
32 static I32 dopoptosub _((I32 startingblock));
33 static void save_lines _((AV *array, SV *sv));
34 static int sortcv _((const void *, const void *));
35 static int sortcmp _((const void *, const void *));
36 static int sortcmp_locale _((const void *, const void *));
46 cxix = dopoptosub(cxstack_ix);
50 if (cxstack[cxix].blk_gimme == G_ARRAY)
63 register PMOP *pm = (PMOP*)cLOGOP->op_other;
69 t = SvPV(tmpstr, len);
71 /* JMR: Check against the last compiled regexp */
72 if ( ! pm->op_pmregexp || ! pm->op_pmregexp->precomp
73 || strnNE(pm->op_pmregexp->precomp, t, len)
74 || pm->op_pmregexp->precomp[len]) {
75 if (pm->op_pmregexp) {
76 pregfree(pm->op_pmregexp);
77 pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
80 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
81 pm->op_pmregexp = pregcomp(t, t + len, pm);
84 if (!pm->op_pmregexp->prelen && curpm)
86 else if (strEQ("\\s+", pm->op_pmregexp->precomp))
87 pm->op_pmflags |= PMf_WHITE;
89 if (pm->op_pmflags & PMf_KEEP) {
90 pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
92 cLOGOP->op_first->op_next = op->op_next;
100 register PMOP *pm = (PMOP*) cLOGOP->op_other;
101 register CONTEXT *cx = &cxstack[cxstack_ix];
102 register SV *dstr = cx->sb_dstr;
103 register char *s = cx->sb_s;
104 register char *m = cx->sb_m;
105 char *orig = cx->sb_orig;
106 register REGEXP *rx = cx->sb_rx;
108 if (cx->sb_iters++) {
109 if (cx->sb_iters > cx->sb_maxiters)
110 DIE("Substitution loop");
112 if (!cx->sb_rxtainted)
113 cx->sb_rxtainted = SvTAINTED(TOPs);
114 sv_catsv(dstr, POPs);
116 Safefree(rx->subbase);
117 rx->subbase = cx->sb_subbase;
120 if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
121 s == m, Nullsv, cx->sb_safebase))
123 SV *targ = cx->sb_targ;
124 sv_catpvn(dstr, s, cx->sb_strend - s);
126 TAINT_IF(cx->sb_rxtainted || rx->exec_tainted);
128 (void)SvOOK_off(targ);
129 Safefree(SvPVX(targ));
130 SvPVX(targ) = SvPVX(dstr);
131 SvCUR_set(targ, SvCUR(dstr));
132 SvLEN_set(targ, SvLEN(dstr));
136 (void)SvPOK_only(targ);
139 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
140 LEAVE_SCOPE(cx->sb_oldsave);
142 RETURNOP(pm->op_next);
145 if (rx->subbase && rx->subbase != orig) {
148 cx->sb_orig = orig = rx->subbase;
150 cx->sb_strend = s + (cx->sb_strend - m);
152 cx->sb_m = m = rx->startp[0];
153 sv_catpvn(dstr, s, m-s);
154 cx->sb_s = rx->endp[0];
155 cx->sb_subbase = rx->subbase;
156 cx->sb_rxtainted |= rx->exec_tainted;
158 rx->subbase = Nullch; /* so recursion works */
159 RETURNOP(pm->op_pmreplstart);
164 dSP; dMARK; dORIGMARK;
165 register SV *form = *++MARK;
177 bool chopspace = (strchr(chopset, ' ') != Nullch);
184 if (!SvMAGICAL(form) || !SvCOMPILED(form)) {
185 SvREADONLY_off(form);
189 SvPV_force(formtarget, len);
190 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
193 /* need to jump to the next word */
194 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
203 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
204 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
205 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
206 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
207 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
209 case FF_CHECKNL: name = "CHECKNL"; break;
210 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
211 case FF_SPACE: name = "SPACE"; break;
212 case FF_HALFSPACE: name = "HALFSPACE"; break;
213 case FF_ITEM: name = "ITEM"; break;
214 case FF_CHOP: name = "CHOP"; break;
215 case FF_LINEGLOB: name = "LINEGLOB"; break;
216 case FF_NEWLINE: name = "NEWLINE"; break;
217 case FF_MORE: name = "MORE"; break;
218 case FF_LINEMARK: name = "LINEMARK"; break;
219 case FF_END: name = "END"; break;
222 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
224 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
253 warn("Not enough format arguments");
258 item = s = SvPV(sv, len);
260 if (itemsize > fieldsize)
261 itemsize = fieldsize;
262 send = chophere = s + itemsize;
274 item = s = SvPV(sv, len);
276 if (itemsize <= fieldsize) {
277 send = chophere = s + itemsize;
288 itemsize = fieldsize;
289 send = chophere = s + itemsize;
290 while (s < send || (s == send && isSPACE(*s))) {
300 if (strchr(chopset, *s))
305 itemsize = chophere - item;
310 arg = fieldsize - itemsize;
319 arg = fieldsize - itemsize;
333 int ch = *t++ = *s++;
337 if ( !((*t++ = *s++) & ~31) )
347 while (*s && isSPACE(*s))
354 item = s = SvPV(sv, len);
367 SvCUR_set(formtarget, t - SvPVX(formtarget));
368 sv_catpvn(formtarget, item, itemsize);
369 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
370 t = SvPVX(formtarget) + SvCUR(formtarget);
375 /* If the field is marked with ^ and the value is undefined,
378 if ((arg & 512) && !SvOK(sv)) {
386 /* Formats aren't yet marked for locales, so assume "yes". */
389 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
391 sprintf(t, "%*.0f", (int) fieldsize, value);
398 while (t-- > linemark && *t == ' ') ;
406 if (arg) { /* repeat until fields exhausted? */
408 SvCUR_set(formtarget, t - SvPVX(formtarget));
409 lines += FmLINES(formtarget);
412 if (strnEQ(linemark, linemark - arg, arg))
413 DIE("Runaway format");
415 FmLINES(formtarget) = lines;
417 RETURNOP(cLISTOP->op_first);
428 arg = fieldsize - itemsize;
435 if (strnEQ(s," ",3)) {
436 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
447 SvCUR_set(formtarget, t - SvPVX(formtarget));
448 FmLINES(formtarget) += lines;
460 if (stack_base + *markstack_ptr == sp) {
462 if (GIMME != G_ARRAY)
464 RETURNOP(op->op_next->op_next);
466 stack_sp = stack_base + *markstack_ptr + 1;
467 pp_pushmark(); /* push dst */
468 pp_pushmark(); /* push src */
469 ENTER; /* enter outer scope */
472 SAVESPTR(GvSV(defgv));
474 ENTER; /* enter inner scope */
477 src = stack_base[*markstack_ptr];
482 if (op->op_type == OP_MAPSTART)
483 pp_pushmark(); /* push top */
484 return ((LOGOP*)op->op_next)->op_other;
489 DIE("panic: mapstart"); /* uses grepstart */
495 I32 diff = (sp - stack_base) - *markstack_ptr;
503 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
504 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
505 count = (sp - stack_base) - markstack_ptr[-1] + 2;
510 markstack_ptr[-1] += shift;
511 *markstack_ptr += shift;
515 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
518 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
520 LEAVE; /* exit inner scope */
523 if (markstack_ptr[-1] > *markstack_ptr) {
526 (void)POPMARK; /* pop top */
527 LEAVE; /* exit outer scope */
528 (void)POPMARK; /* pop src */
529 items = --*markstack_ptr - markstack_ptr[-1];
530 (void)POPMARK; /* pop dst */
531 SP = stack_base + POPMARK; /* pop original mark */
532 if (GIMME != G_ARRAY) {
543 ENTER; /* enter inner scope */
546 src = stack_base[markstack_ptr[-1]];
550 RETURNOP(cLOGOP->op_other);
557 dSP; dMARK; dORIGMARK;
559 SV **myorigmark = ORIGMARK;
565 OP* nextop = op->op_next;
567 if (gimme != G_ARRAY) {
572 if (op->op_flags & OPf_STACKED) {
574 if (op->op_flags & OPf_SPECIAL) {
575 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
576 kid = kUNOP->op_first; /* pass rv2gv */
577 kid = kUNOP->op_first; /* pass leave */
578 sortcop = kid->op_next;
579 stash = curcop->cop_stash;
582 cv = sv_2cv(*++MARK, &stash, &gv, 0);
583 if (!(cv && CvROOT(cv))) {
585 SV *tmpstr = sv_newmortal();
586 gv_efullname3(tmpstr, gv, Nullch);
587 if (cv && CvXSUB(cv))
588 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
589 DIE("Undefined sort subroutine \"%s\" called",
594 DIE("Xsub called in sort");
595 DIE("Undefined subroutine in sort");
597 DIE("Not a CODE reference in sort");
599 sortcop = CvSTART(cv);
600 SAVESPTR(CvROOT(cv)->op_ppaddr);
601 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
604 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
609 stash = curcop->cop_stash;
613 while (MARK < SP) { /* This may or may not shift down one here. */
615 if (*up = *++MARK) { /* Weed out nulls. */
617 if (!sortcop && !SvPOK(*up))
618 (void)sv_2pv(*up, &na);
622 max = --up - myorigmark;
635 AvREAL_off(sortstack);
636 av_extend(sortstack, 32);
638 SWITCHSTACK(curstack, sortstack);
639 if (sortstash != stash) {
640 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
641 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
645 SAVESPTR(GvSV(firstgv));
646 SAVESPTR(GvSV(secondgv));
647 PUSHBLOCK(cx, CXt_NULL, stack_base);
648 sortcxix = cxstack_ix;
650 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
653 SWITCHSTACK(sortstack, oldstack);
659 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
660 qsort((char*)(ORIGMARK+1), max, sizeof(SV*),
661 (op->op_private & OPpLOCALE) ? sortcmp_locale : sortcmp);
664 stack_sp = ORIGMARK + max;
672 if (GIMME == G_ARRAY)
673 return cCONDOP->op_true;
674 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
681 if (GIMME == G_ARRAY) {
682 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
686 SV *targ = PAD_SV(op->op_targ);
688 if ((op->op_private & OPpFLIP_LINENUM)
689 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
691 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
692 if (op->op_flags & OPf_SPECIAL) {
699 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
712 if (GIMME == G_ARRAY) {
718 if (SvNIOKp(left) || !SvPOKp(left) ||
719 (looks_like_number(left) && *SvPVX(left) != '0') )
724 EXTEND_MORTAL(max - i + 1);
725 EXTEND(SP, max - i + 1);
728 sv = sv_2mortal(newSViv(i++));
733 SV *final = sv_mortalcopy(right);
735 char *tmps = SvPV(final, len);
737 sv = sv_mortalcopy(left);
738 while (!SvNIOKp(sv) && SvCUR(sv) <= len &&
739 strNE(SvPVX(sv),tmps) ) {
741 sv = sv_2mortal(newSVsv(sv));
744 if (strEQ(SvPVX(sv),tmps))
750 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
752 if ((op->op_private & OPpFLIP_LINENUM)
753 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
755 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
756 sv_catpv(targ, "E0");
771 register CONTEXT *cx;
773 for (i = cxstack_ix; i >= 0; i--) {
775 switch (cx->cx_type) {
778 warn("Exiting substitution via %s", op_name[op->op_type]);
782 warn("Exiting subroutine via %s", op_name[op->op_type]);
786 warn("Exiting eval via %s", op_name[op->op_type]);
790 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
793 if (!cx->blk_loop.label ||
794 strNE(label, cx->blk_loop.label) ) {
795 DEBUG_l(deb("(Skipping label #%d %s)\n",
796 i, cx->blk_loop.label));
799 DEBUG_l( deb("(Found label #%d %s)\n", i, label));
811 cxix = dopoptosub(cxstack_ix);
815 if (cxstack[cxix].blk_gimme == G_ARRAY)
822 dopoptosub(startingblock)
826 register CONTEXT *cx;
827 for (i = startingblock; i >= 0; i--) {
829 switch (cx->cx_type) {
834 DEBUG_l( deb("(Found sub #%d)\n", i));
842 dopoptoeval(startingblock)
846 register CONTEXT *cx;
847 for (i = startingblock; i >= 0; i--) {
849 switch (cx->cx_type) {
853 DEBUG_l( deb("(Found eval #%d)\n", i));
861 dopoptoloop(startingblock)
865 register CONTEXT *cx;
866 for (i = startingblock; i >= 0; i--) {
868 switch (cx->cx_type) {
871 warn("Exiting substitution via %s", op_name[op->op_type]);
875 warn("Exiting subroutine via %s", op_name[op->op_type]);
879 warn("Exiting eval via %s", op_name[op->op_type]);
883 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
886 DEBUG_l( deb("(Found loop #%d)\n", i));
897 register CONTEXT *cx;
901 while (cxstack_ix > cxix) {
902 cx = &cxstack[cxstack_ix--];
903 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
904 block_type[cx->cx_type]));
905 /* Note: we don't need to restore the base context info till the end. */
906 switch (cx->cx_type) {
929 register CONTEXT *cx;
935 STRLEN klen = strlen(message);
937 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
940 static char prefix[] = "\t(in cleanup) ";
941 sv_upgrade(*svp, SVt_IV);
942 (void)SvIOK_only(*svp);
943 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
944 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
945 sv_catpvn(GvSV(errgv), message, klen);
951 sv_setpv(GvSV(errgv), message);
953 cxix = dopoptoeval(cxstack_ix);
957 if (cxix < cxstack_ix)
961 if (cx->cx_type != CXt_EVAL) {
962 PerlIO_printf(PerlIO_stderr(), "panic: die %s", message);
967 if (gimme == G_SCALAR)
968 *++newsp = &sv_undef;
973 if (optype == OP_REQUIRE)
974 DIE("%s", SvPVx(GvSV(errgv), na));
978 PerlIO_printf(PerlIO_stderr(), "%s",message);
979 PerlIO_flush(PerlIO_stderr());
988 if (SvTRUE(left) != SvTRUE(right))
1000 RETURNOP(cLOGOP->op_other);
1009 RETURNOP(cLOGOP->op_other);
1016 SV** mark = (stack_base + *markstack_ptr + 1);
1018 while (mark < sp) { /* emulate old interface */
1023 return pp_entersub();
1030 register I32 cxix = dopoptosub(cxstack_ix);
1031 register CONTEXT *cx;
1041 if (GIMME != G_ARRAY)
1045 if (DBsub && cxix >= 0 &&
1046 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1050 cxix = dopoptosub(cxix - 1);
1052 cx = &cxstack[cxix];
1053 if (cxstack[cxix].cx_type == CXt_SUB) {
1054 dbcxix = dopoptosub(cxix - 1);
1055 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1056 field below is defined for any cx. */
1057 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1058 cx = &cxstack[dbcxix];
1061 if (GIMME != G_ARRAY) {
1064 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1069 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1070 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1071 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1074 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
1076 gv_efullname3(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch);
1077 PUSHs(sv_2mortal(sv));
1078 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1081 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1082 PUSHs(sv_2mortal(newSViv(0)));
1084 PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
1085 if (cx->cx_type == CXt_EVAL) {
1086 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1087 PUSHs(cx->blk_eval.cur_text);
1090 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1091 /* Require, put the name. */
1092 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1096 else if (cx->cx_type == CXt_SUB &&
1097 cx->blk_sub.hasargs &&
1098 curcop->cop_stash == debstash)
1100 AV *ary = cx->blk_sub.argarray;
1101 int off = AvARRAY(ary) - AvALLOC(ary);
1105 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1108 AvREAL_off(dbargs); /* XXX Should be REIFY */
1111 if (AvMAX(dbargs) < AvFILL(ary) + off)
1112 av_extend(dbargs, AvFILL(ary) + off);
1113 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1114 AvFILL(dbargs) = AvFILL(ary) + off;
1124 SV **str1 = (SV **) a;
1125 SV **str2 = (SV **) b;
1126 I32 oldsaveix = savestack_ix;
1127 I32 oldscopeix = scopestack_ix;
1129 GvSV(firstgv) = *str1;
1130 GvSV(secondgv) = *str2;
1131 stack_sp = stack_base;
1134 if (stack_sp != stack_base + 1)
1135 croak("Sort subroutine didn't return single value");
1136 if (!SvNIOKp(*stack_sp))
1137 croak("Sort subroutine didn't return a numeric value");
1138 result = SvIV(*stack_sp);
1139 while (scopestack_ix > oldscopeix) {
1142 leave_scope(oldsaveix);
1151 return sv_cmp(*(SV **)a, *(SV **)b);
1155 sortcmp_locale(a, b)
1159 return sv_cmp_locale(*(SV **)a, *(SV **)b);
1171 sv_reset(tmps, curcop->cop_stash);
1184 TAINT_NOT; /* Each statement is presumed innocent */
1185 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1188 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1192 register CONTEXT *cx;
1193 I32 gimme = G_ARRAY;
1200 DIE("No DB::DB routine defined");
1202 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
1214 push_return(op->op_next);
1215 PUSHBLOCK(cx, CXt_SUB, sp);
1218 (void)SvREFCNT_inc(cv);
1220 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1221 RETURNOP(CvSTART(cv));
1235 register CONTEXT *cx;
1243 svp = &curpad[op->op_targ]; /* "my" variable */
1245 svp = &GvSV((GV*)POPs); /* symbol table variable */
1251 PUSHBLOCK(cx, CXt_LOOP, SP);
1252 PUSHLOOP(cx, svp, MARK);
1253 if (op->op_flags & OPf_STACKED)
1254 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1256 cx->blk_loop.iterary = curstack;
1257 AvFILL(curstack) = sp - stack_base;
1258 cx->blk_loop.iterix = MARK - stack_base;
1267 register CONTEXT *cx;
1274 PUSHBLOCK(cx, CXt_LOOP, SP);
1275 PUSHLOOP(cx, 0, SP);
1283 register CONTEXT *cx;
1284 struct block_loop cxloop;
1292 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1294 if (gimme == G_SCALAR) {
1295 if (op->op_private & OPpLEAVE_VOID)
1299 *++newsp = sv_mortalcopy(*SP);
1301 *++newsp = &sv_undef;
1306 *++newsp = sv_mortalcopy(*++mark);
1311 POPLOOP2(); /* Stack values are safe: release loop vars ... */
1312 curpm = newpm; /* ... and pop $1 et al */
1324 register CONTEXT *cx;
1325 struct block_sub cxsub;
1326 bool popsub2 = FALSE;
1332 if (curstack == sortstack) {
1333 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
1334 if (cxstack_ix > sortcxix)
1336 AvARRAY(curstack)[1] = *SP;
1337 stack_sp = stack_base + 1;
1342 cxix = dopoptosub(cxstack_ix);
1344 DIE("Can't return outside a subroutine");
1345 if (cxix < cxstack_ix)
1349 switch (cx->cx_type) {
1351 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1356 if (optype == OP_REQUIRE &&
1357 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1359 char *name = cx->blk_eval.old_name;
1360 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1361 DIE("%s did not return a true value", name);
1365 DIE("panic: return");
1369 if (gimme == G_SCALAR) {
1371 *++newsp = (popsub2 && SvTEMP(*SP))
1372 ? *SP : sv_mortalcopy(*SP);
1374 *++newsp = &sv_undef;
1377 while (++MARK <= SP)
1378 *++newsp = (popsub2 && SvTEMP(*MARK))
1379 ? *MARK : sv_mortalcopy(*MARK);
1383 /* Stack values are safe: */
1385 POPSUB2(); /* release CV and @_ ... */
1387 curpm = newpm; /* ... and pop $1 et al */
1390 return pop_return();
1397 register CONTEXT *cx;
1398 struct block_loop cxloop;
1399 struct block_sub cxsub;
1406 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
1408 if (op->op_flags & OPf_SPECIAL) {
1409 cxix = dopoptoloop(cxstack_ix);
1411 DIE("Can't \"last\" outside a block");
1414 cxix = dopoptolabel(cPVOP->op_pv);
1416 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1418 if (cxix < cxstack_ix)
1422 switch (cx->cx_type) {
1424 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1426 nextop = cxloop.last_op->op_next;
1429 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1431 nextop = pop_return();
1435 nextop = pop_return();
1442 if (gimme == G_SCALAR) {
1444 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1445 ? *SP : sv_mortalcopy(*SP);
1447 *++newsp = &sv_undef;
1450 while (++MARK <= SP)
1451 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1452 ? *MARK : sv_mortalcopy(*MARK);
1457 /* Stack values are safe: */
1460 POPLOOP2(); /* release loop vars ... */
1464 POPSUB2(); /* release CV and @_ ... */
1467 curpm = newpm; /* ... and pop $1 et al */
1476 register CONTEXT *cx;
1479 if (op->op_flags & OPf_SPECIAL) {
1480 cxix = dopoptoloop(cxstack_ix);
1482 DIE("Can't \"next\" outside a block");
1485 cxix = dopoptolabel(cPVOP->op_pv);
1487 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1489 if (cxix < cxstack_ix)
1493 oldsave = scopestack[scopestack_ix - 1];
1494 LEAVE_SCOPE(oldsave);
1495 return cx->blk_loop.next_op;
1501 register CONTEXT *cx;
1504 if (op->op_flags & OPf_SPECIAL) {
1505 cxix = dopoptoloop(cxstack_ix);
1507 DIE("Can't \"redo\" outside a block");
1510 cxix = dopoptolabel(cPVOP->op_pv);
1512 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1514 if (cxix < cxstack_ix)
1518 oldsave = scopestack[scopestack_ix - 1];
1519 LEAVE_SCOPE(oldsave);
1520 return cx->blk_loop.redo_op;
1523 static OP* lastgotoprobe;
1526 dofindlabel(op,label,opstack)
1534 if (op->op_type == OP_LEAVE ||
1535 op->op_type == OP_SCOPE ||
1536 op->op_type == OP_LEAVELOOP ||
1537 op->op_type == OP_LEAVETRY)
1538 *ops++ = cUNOP->op_first;
1540 if (op->op_flags & OPf_KIDS) {
1541 /* First try all the kids at this level, since that's likeliest. */
1542 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1543 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1544 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1547 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1548 if (kid == lastgotoprobe)
1550 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1551 if (ops > opstack &&
1552 (ops[-1]->op_type == OP_NEXTSTATE ||
1553 ops[-1]->op_type == OP_DBSTATE))
1558 if (op = dofindlabel(kid,label,ops))
1568 return pp_goto(ARGS);
1577 register CONTEXT *cx;
1580 int do_dump = (op->op_type == OP_DUMP);
1583 if (op->op_flags & OPf_STACKED) {
1586 /* This egregious kludge implements goto &subroutine */
1587 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1589 register CONTEXT *cx;
1590 CV* cv = (CV*)SvRV(sv);
1595 if (!CvROOT(cv) && !CvXSUB(cv)) {
1597 SV *tmpstr = sv_newmortal();
1598 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1599 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1601 DIE("Goto undefined subroutine");
1604 /* First do some returnish stuff. */
1605 cxix = dopoptosub(cxstack_ix);
1607 DIE("Can't goto subroutine outside a subroutine");
1608 if (cxix < cxstack_ix)
1612 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1613 AV* av = cx->blk_sub.argarray;
1615 items = AvFILL(av) + 1;
1617 EXTEND(stack_sp, items); /* @_ could have been extended. */
1618 Copy(AvARRAY(av), stack_sp, items, SV*);
1620 SvREFCNT_dec(GvAV(defgv));
1621 GvAV(defgv) = cx->blk_sub.savearray;
1625 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1626 SvREFCNT_dec(cx->blk_sub.cv);
1627 oldsave = scopestack[scopestack_ix - 1];
1628 LEAVE_SCOPE(oldsave);
1630 /* Now do some callish stuff. */
1633 if (CvOLDSTYLE(cv)) {
1634 I32 (*fp3)_((int,int,int));
1639 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1640 items = (*fp3)(CvXSUBANY(cv).any_i32,
1641 mark - stack_base + 1,
1643 sp = stack_base + items;
1646 stack_sp--; /* There is no cv arg. */
1647 (void)(*CvXSUB(cv))(cv);
1650 return pop_return();
1653 AV* padlist = CvPADLIST(cv);
1654 SV** svp = AvARRAY(padlist);
1655 cx->blk_sub.cv = cv;
1656 cx->blk_sub.olddepth = CvDEPTH(cv);
1658 if (CvDEPTH(cv) < 2)
1659 (void)SvREFCNT_inc(cv);
1660 else { /* save temporaries on recursion? */
1661 if (CvDEPTH(cv) == 100 && dowarn)
1662 sub_crush_depth(cv);
1663 if (CvDEPTH(cv) > AvFILL(padlist)) {
1664 AV *newpad = newAV();
1665 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1666 I32 ix = AvFILL((AV*)svp[1]);
1667 svp = AvARRAY(svp[0]);
1668 for ( ;ix > 0; ix--) {
1669 if (svp[ix] != &sv_undef) {
1670 char *name = SvPVX(svp[ix]);
1671 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
1674 /* outer lexical or anon code */
1675 av_store(newpad, ix,
1676 SvREFCNT_inc(oldpad[ix]) );
1678 else { /* our own lexical */
1680 av_store(newpad, ix, sv = (SV*)newAV());
1681 else if (*name == '%')
1682 av_store(newpad, ix, sv = (SV*)newHV());
1684 av_store(newpad, ix, sv = NEWSV(0,0));
1689 av_store(newpad, ix, sv = NEWSV(0,0));
1693 if (cx->blk_sub.hasargs) {
1696 av_store(newpad, 0, (SV*)av);
1697 AvFLAGS(av) = AVf_REIFY;
1699 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1700 AvFILL(padlist) = CvDEPTH(cv);
1701 svp = AvARRAY(padlist);
1705 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1706 if (cx->blk_sub.hasargs) {
1707 AV* av = (AV*)curpad[0];
1710 cx->blk_sub.savearray = GvAV(defgv);
1711 cx->blk_sub.argarray = av;
1712 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1715 if (items >= AvMAX(av) + 1) {
1717 if (AvARRAY(av) != ary) {
1718 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1719 SvPVX(av) = (char*)ary;
1721 if (items >= AvMAX(av) + 1) {
1722 AvMAX(av) = items - 1;
1723 Renew(ary,items+1,SV*);
1725 SvPVX(av) = (char*)ary;
1728 Copy(mark,AvARRAY(av),items,SV*);
1729 AvFILL(av) = items - 1;
1737 if (perldb && curstash != debstash) {
1739 * We do not care about using sv to call CV;
1740 * it's for informational purposes only.
1742 SV *sv = GvSV(DBsub);
1744 gv_efullname3(sv, CvGV(cv), Nullch);
1746 RETURNOP(CvSTART(cv));
1750 label = SvPV(sv,na);
1752 else if (op->op_flags & OPf_SPECIAL) {
1754 DIE("goto must have label");
1757 label = cPVOP->op_pv;
1759 if (label && *label) {
1766 for (ix = cxstack_ix; ix >= 0; ix--) {
1768 switch (cx->cx_type) {
1770 gotoprobe = CvROOT(cx->blk_sub.cv);
1773 gotoprobe = eval_root; /* XXX not good for nested eval */
1776 gotoprobe = cx->blk_oldcop->op_sibling;
1782 gotoprobe = cx->blk_oldcop->op_sibling;
1784 gotoprobe = main_root;
1787 DIE("Can't \"goto\" outside a block");
1793 gotoprobe = main_root;
1796 retop = dofindlabel(gotoprobe, label, enterops);
1799 lastgotoprobe = gotoprobe;
1802 DIE("Can't find label %s", label);
1804 /* pop unwanted frames */
1806 if (ix < cxstack_ix) {
1813 oldsave = scopestack[scopestack_ix];
1814 LEAVE_SCOPE(oldsave);
1817 /* push wanted frames */
1819 if (*enterops && enterops[1]) {
1821 for (ix = 1; enterops[ix]; ix++) {
1831 if (!retop) retop = main_start;
1838 restartop = 0; /* hmm, must be GNU unexec().. */
1842 if (curstack == signalstack) {
1844 Siglongjmp(top_env, 3);
1860 if (anum == 1 && VMSISH_EXIT)
1873 double value = SvNVx(GvSV(cCOP->cop_gv));
1874 register I32 match = I_32(value);
1877 if (((double)match) > value)
1878 --match; /* was fractional--truncate other way */
1880 match -= cCOP->uop.scop.scop_offset;
1883 else if (match > cCOP->uop.scop.scop_max)
1884 match = cCOP->uop.scop.scop_max;
1885 op = cCOP->uop.scop.scop_next[match];
1895 op = op->op_next; /* can't assume anything */
1897 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1898 match -= cCOP->uop.scop.scop_offset;
1901 else if (match > cCOP->uop.scop.scop_max)
1902 match = cCOP->uop.scop.scop_max;
1903 op = cCOP->uop.scop.scop_next[match];
1912 save_lines(array, sv)
1916 register char *s = SvPVX(sv);
1917 register char *send = SvPVX(sv) + SvCUR(sv);
1919 register I32 line = 1;
1921 while (s && s < send) {
1922 SV *tmpstr = NEWSV(85,0);
1924 sv_upgrade(tmpstr, SVt_PVMG);
1925 t = strchr(s, '\n');
1931 sv_setpvn(tmpstr, s, t - s);
1932 av_store(array, line++, tmpstr);
1951 /* set up a scratch pad */
1956 SAVESPTR(comppad_name);
1957 SAVEI32(comppad_name_fill);
1958 SAVEI32(min_intro_pending);
1959 SAVEI32(max_intro_pending);
1963 compcv = (CV*)NEWSV(1104,0);
1964 sv_upgrade((SV *)compcv, SVt_PVCV);
1965 CvUNIQUE_on(compcv);
1968 comppad_name = newAV();
1969 comppad_name_fill = 0;
1970 min_intro_pending = 0;
1971 av_push(comppad, Nullsv);
1972 curpad = AvARRAY(comppad);
1975 comppadlist = newAV();
1976 AvREAL_off(comppadlist);
1977 av_store(comppadlist, 0, (SV*)comppad_name);
1978 av_store(comppadlist, 1, (SV*)comppad);
1979 CvPADLIST(compcv) = comppadlist;
1981 if (saveop->op_type != OP_REQUIRE)
1982 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(caller);
1986 /* make sure we compile in the right package */
1988 newstash = curcop->cop_stash;
1989 if (curstash != newstash) {
1991 curstash = newstash;
1995 SAVEFREESV(beginav);
1997 /* try to compile it */
2001 curcop = &compiling;
2002 curcop->cop_arybase = 0;
2004 rs = newSVpv("\n", 1);
2005 if (saveop->op_flags & OPf_SPECIAL)
2008 sv_setpv(GvSV(errgv),"");
2009 if (yyparse() || error_count || !eval_root) {
2020 SP = stack_base + POPMARK; /* pop original mark */
2026 if (optype == OP_REQUIRE)
2027 DIE("%s", SvPVx(GvSV(errgv), na));
2029 rs = SvREFCNT_inc(nrs);
2033 rs = SvREFCNT_inc(nrs);
2034 compiling.cop_line = 0;
2035 SAVEFREEOP(eval_root);
2036 if (gimme & G_ARRAY)
2041 DEBUG_x(dump_eval());
2043 /* Register with debugger: */
2044 if (perldb && saveop->op_type == OP_REQUIRE) {
2045 CV *cv = perl_get_cv("DB::postponed", FALSE);
2049 XPUSHs((SV*)compiling.cop_filegv);
2051 perl_call_sv((SV*)cv, G_DISCARD);
2055 /* compiled okay, so do it */
2057 CvDEPTH(compcv) = 1;
2059 SP = stack_base + POPMARK; /* pop original mark */
2060 RETURNOP(eval_start);
2066 register CONTEXT *cx;
2071 I32 gimme = G_SCALAR;
2072 PerlIO *tryrsfp = 0;
2075 if (SvNIOKp(sv) && !SvPOKp(sv)) {
2076 SET_NUMERIC_STANDARD();
2077 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2078 DIE("Perl %s required--this is only version %s, stopped",
2079 SvPV(sv,na),patchlevel);
2082 name = SvPV(sv, na);
2084 DIE("Null filename used");
2085 TAINT_PROPER("require");
2086 if (op->op_type == OP_REQUIRE &&
2087 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2091 /* prepare to compile file */
2093 tmpname = savepv(name);
2094 if (*tmpname == '/' ||
2096 (tmpname[1] == '/' ||
2097 (tmpname[1] == '.' && tmpname[2] == '/')))
2099 || (tmpname[0] && tmpname[1] == ':')
2102 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2103 (isALNUM(tmpname[1]) || strchr("$-_]>",tmpname[1]))))
2107 tryrsfp = PerlIO_open(tmpname,"r");
2110 AV *ar = GvAVn(incgv);
2113 char unixified[256];
2114 if (tounixspec_ts(tmpname,unixified) != NULL)
2115 for (i = 0; i <= AvFILL(ar); i++) {
2116 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
2118 strcat(buf,unixified);
2120 for (i = 0; i <= AvFILL(ar); i++) {
2121 (void)sprintf(buf, "%s/%s",
2122 SvPVx(*av_fetch(ar, i, TRUE), na), name);
2124 tryrsfp = PerlIO_open(buf, "r");
2128 if (*s == '.' && s[1] == '/')
2131 tmpname = savepv(s);
2136 SAVESPTR(compiling.cop_filegv);
2137 compiling.cop_filegv = gv_fetchfile(tmpname);
2141 if (op->op_type == OP_REQUIRE) {
2142 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2143 if (instr(tokenbuf,".h "))
2144 strcat(tokenbuf," (change .h to .ph maybe?)");
2145 if (instr(tokenbuf,".ph "))
2146 strcat(tokenbuf," (did you run h2ph?)");
2153 /* Assume success here to prevent recursive requirement. */
2154 (void)hv_store(GvHVn(incgv), name, strlen(name),
2155 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2159 lex_start(sv_2mortal(newSVpv("",0)));
2161 save_aptr(&rsfp_filters);
2162 rsfp_filters = NULL;
2166 name = savepv(name);
2171 /* switch to eval mode */
2173 push_return(op->op_next);
2174 PUSHBLOCK(cx, CXt_EVAL, SP);
2175 PUSHEVAL(cx, name, compiling.cop_filegv);
2177 compiling.cop_line = 0;
2180 return doeval(G_SCALAR);
2185 return pp_require(ARGS);
2191 register CONTEXT *cx;
2193 I32 gimme = GIMME, was = sub_generation;
2194 char tmpbuf[32], *safestr;
2198 if (!SvPV(sv,len) || !len)
2200 TAINT_PROPER("eval");
2206 /* switch to eval mode */
2208 SAVESPTR(compiling.cop_filegv);
2209 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++evalseq);
2210 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2211 compiling.cop_line = 1;
2212 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2213 deleting the eval's FILEGV from the stash before gv_check() runs
2214 (i.e. before run-time proper). To work around the coredump that
2215 ensues, we always turn GvMULTI_on for any globals that were
2216 introduced within evals. See force_ident(). GSAR 96-10-12 */
2217 safestr = savepv(tmpbuf);
2218 SAVEDELETE(defstash, safestr, strlen(safestr));
2220 hints = op->op_targ;
2222 push_return(op->op_next);
2223 PUSHBLOCK(cx, CXt_EVAL, SP);
2224 PUSHEVAL(cx, 0, compiling.cop_filegv);
2226 /* prepare to compile string */
2228 if (perldb && curstash != debstash)
2229 save_lines(GvAV(compiling.cop_filegv), linestr);
2231 ret = doeval(gimme);
2232 if (perldb && was != sub_generation) { /* Some subs defined here. */
2233 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
2245 register CONTEXT *cx;
2247 U8 save_flags = op -> op_flags;
2252 retop = pop_return();
2254 if (gimme == G_SCALAR) {
2255 if (op->op_private & OPpLEAVE_VOID)
2260 if (SvFLAGS(TOPs) & SVs_TEMP)
2263 *MARK = sv_mortalcopy(TOPs);
2273 for (mark = newsp + 1; mark <= SP; mark++)
2274 if (!(SvFLAGS(*mark) & SVs_TEMP))
2275 *mark = sv_mortalcopy(*mark);
2276 /* in case LEAVE wipes old return values */
2278 curpm = newpm; /* Don't pop $1 et al till now */
2281 assert(CvDEPTH(compcv) == 1);
2283 CvDEPTH(compcv) = 0;
2285 if (optype == OP_REQUIRE &&
2286 !(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
2287 char *name = cx->blk_eval.old_name;
2289 /* Unassume the success we assumed earlier. */
2290 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
2291 retop = die("%s did not return a true value", name);
2297 if (!(save_flags & OPf_SPECIAL))
2298 sv_setpv(GvSV(errgv),"");
2306 register CONTEXT *cx;
2312 push_return(cLOGOP->op_other->op_next);
2313 PUSHBLOCK(cx, CXt_EVAL, SP);
2315 eval_root = op; /* Only needed so that goto works right. */
2318 sv_setpv(GvSV(errgv),"");
2329 register CONTEXT *cx;
2336 if (gimme == G_SCALAR) {
2337 if (op->op_private & OPpLEAVE_VOID)
2342 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2345 *MARK = sv_mortalcopy(TOPs);
2355 for (mark = newsp + 1; mark <= SP; mark++)
2356 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
2357 *mark = sv_mortalcopy(*mark);
2358 /* in case LEAVE wipes old return values */
2360 curpm = newpm; /* Don't pop $1 et al till now */
2363 sv_setpv(GvSV(errgv),"");
2372 register char *s = SvPV_force(sv, len);
2373 register char *send = s + len;
2374 register char *base;
2375 register I32 skipspaces = 0;
2378 bool postspace = FALSE;
2386 croak("Null picture in formline");
2388 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
2393 *fpc++ = FF_LINEMARK;
2394 noblank = repeat = FALSE;
2412 case ' ': case '\t':
2423 *fpc++ = FF_LITERAL;
2431 *fpc++ = skipspaces;
2435 *fpc++ = FF_NEWLINE;
2439 arg = fpc - linepc + 1;
2446 *fpc++ = FF_LINEMARK;
2447 noblank = repeat = FALSE;
2456 ischop = s[-1] == '^';
2462 arg = (s - base) - 1;
2464 *fpc++ = FF_LITERAL;
2473 *fpc++ = FF_LINEGLOB;
2475 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2476 arg = ischop ? 512 : 0;
2486 arg |= 256 + (s - f);
2488 *fpc++ = s - base; /* fieldsize for FETCH */
2489 *fpc++ = FF_DECIMAL;
2494 bool ismore = FALSE;
2497 while (*++s == '>') ;
2498 prespace = FF_SPACE;
2500 else if (*s == '|') {
2501 while (*++s == '|') ;
2502 prespace = FF_HALFSPACE;
2507 while (*++s == '<') ;
2510 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2514 *fpc++ = s - base; /* fieldsize for FETCH */
2516 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2534 { /* need to jump to the next word */
2536 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2537 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2538 s = SvPVX(sv) + SvCUR(sv) + z;
2540 Copy(fops, s, arg, U16);
2542 sv_magic(sv, Nullsv, 'f', Nullch, 0);