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 (void)SvOOK_off(targ);
127 Safefree(SvPVX(targ));
128 SvPVX(targ) = SvPVX(dstr);
129 SvCUR_set(targ, SvCUR(dstr));
130 SvLEN_set(targ, SvLEN(dstr));
134 (void)SvPOK_only(targ);
136 if (cx->sb_rxtainted)
138 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
139 LEAVE_SCOPE(cx->sb_oldsave);
141 RETURNOP(pm->op_next);
144 if (rx->subbase && rx->subbase != orig) {
147 cx->sb_orig = orig = rx->subbase;
149 cx->sb_strend = s + (cx->sb_strend - m);
151 cx->sb_m = m = rx->startp[0];
152 sv_catpvn(dstr, s, m-s);
153 cx->sb_s = rx->endp[0];
154 cx->sb_subbase = rx->subbase;
155 cx->sb_rxtainted |= rx->exec_tainted;
157 rx->subbase = Nullch; /* so recursion works */
158 RETURNOP(pm->op_pmreplstart);
163 dSP; dMARK; dORIGMARK;
164 register SV *form = *++MARK;
176 bool chopspace = (strchr(chopset, ' ') != Nullch);
183 if (!SvMAGICAL(form) || !SvCOMPILED(form)) {
184 SvREADONLY_off(form);
188 SvPV_force(formtarget, len);
189 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
192 /* need to jump to the next word */
193 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
202 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
203 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
204 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
205 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
206 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
208 case FF_CHECKNL: name = "CHECKNL"; break;
209 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
210 case FF_SPACE: name = "SPACE"; break;
211 case FF_HALFSPACE: name = "HALFSPACE"; break;
212 case FF_ITEM: name = "ITEM"; break;
213 case FF_CHOP: name = "CHOP"; break;
214 case FF_LINEGLOB: name = "LINEGLOB"; break;
215 case FF_NEWLINE: name = "NEWLINE"; break;
216 case FF_MORE: name = "MORE"; break;
217 case FF_LINEMARK: name = "LINEMARK"; break;
218 case FF_END: name = "END"; break;
221 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
223 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
252 warn("Not enough format arguments");
257 item = s = SvPV(sv, len);
259 if (itemsize > fieldsize)
260 itemsize = fieldsize;
261 send = chophere = s + itemsize;
273 item = s = SvPV(sv, len);
275 if (itemsize <= fieldsize) {
276 send = chophere = s + itemsize;
287 itemsize = fieldsize;
288 send = chophere = s + itemsize;
289 while (s < send || (s == send && isSPACE(*s))) {
299 if (strchr(chopset, *s))
304 itemsize = chophere - item;
309 arg = fieldsize - itemsize;
318 arg = fieldsize - itemsize;
332 int ch = *t++ = *s++;
336 if ( !((*t++ = *s++) & ~31) )
346 while (*s && isSPACE(*s))
353 item = s = SvPV(sv, len);
366 SvCUR_set(formtarget, t - SvPVX(formtarget));
367 sv_catpvn(formtarget, item, itemsize);
368 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
369 t = SvPVX(formtarget) + SvCUR(formtarget);
374 /* If the field is marked with ^ and the value is undefined,
377 if ((arg & 512) && !SvOK(sv)) {
385 /* Formats aren't yet marked for locales, so assume "yes". */
388 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
390 sprintf(t, "%*.0f", (int) fieldsize, value);
397 while (t-- > linemark && *t == ' ') ;
405 if (arg) { /* repeat until fields exhausted? */
407 SvCUR_set(formtarget, t - SvPVX(formtarget));
408 lines += FmLINES(formtarget);
411 if (strnEQ(linemark, linemark - arg, arg))
412 DIE("Runaway format");
414 FmLINES(formtarget) = lines;
416 RETURNOP(cLISTOP->op_first);
427 arg = fieldsize - itemsize;
434 if (strnEQ(s," ",3)) {
435 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
446 SvCUR_set(formtarget, t - SvPVX(formtarget));
447 FmLINES(formtarget) += lines;
459 if (stack_base + *markstack_ptr == sp) {
461 if (GIMME != G_ARRAY)
463 RETURNOP(op->op_next->op_next);
465 stack_sp = stack_base + *markstack_ptr + 1;
466 pp_pushmark(); /* push dst */
467 pp_pushmark(); /* push src */
468 ENTER; /* enter outer scope */
471 SAVESPTR(GvSV(defgv));
473 ENTER; /* enter inner scope */
476 src = stack_base[*markstack_ptr];
481 if (op->op_type == OP_MAPSTART)
482 pp_pushmark(); /* push top */
483 return ((LOGOP*)op->op_next)->op_other;
488 DIE("panic: mapstart"); /* uses grepstart */
494 I32 diff = (sp - stack_base) - *markstack_ptr;
502 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
503 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
504 count = (sp - stack_base) - markstack_ptr[-1] + 2;
509 markstack_ptr[-1] += shift;
510 *markstack_ptr += shift;
514 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
517 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
519 LEAVE; /* exit inner scope */
522 if (markstack_ptr[-1] > *markstack_ptr) {
525 (void)POPMARK; /* pop top */
526 LEAVE; /* exit outer scope */
527 (void)POPMARK; /* pop src */
528 items = --*markstack_ptr - markstack_ptr[-1];
529 (void)POPMARK; /* pop dst */
530 SP = stack_base + POPMARK; /* pop original mark */
531 if (GIMME != G_ARRAY) {
542 ENTER; /* enter inner scope */
545 src = stack_base[markstack_ptr[-1]];
549 RETURNOP(cLOGOP->op_other);
556 dSP; dMARK; dORIGMARK;
558 SV **myorigmark = ORIGMARK;
564 OP* nextop = op->op_next;
566 if (gimme != G_ARRAY) {
571 if (op->op_flags & OPf_STACKED) {
573 if (op->op_flags & OPf_SPECIAL) {
574 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
575 kid = kUNOP->op_first; /* pass rv2gv */
576 kid = kUNOP->op_first; /* pass leave */
577 sortcop = kid->op_next;
578 stash = curcop->cop_stash;
581 cv = sv_2cv(*++MARK, &stash, &gv, 0);
582 if (!(cv && CvROOT(cv))) {
584 SV *tmpstr = sv_newmortal();
585 gv_efullname3(tmpstr, gv, Nullch);
586 if (cv && CvXSUB(cv))
587 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
588 DIE("Undefined sort subroutine \"%s\" called",
593 DIE("Xsub called in sort");
594 DIE("Undefined subroutine in sort");
596 DIE("Not a CODE reference in sort");
598 sortcop = CvSTART(cv);
599 SAVESPTR(CvROOT(cv)->op_ppaddr);
600 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
603 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
608 stash = curcop->cop_stash;
612 while (MARK < SP) { /* This may or may not shift down one here. */
614 if (*up = *++MARK) { /* Weed out nulls. */
616 if (!sortcop && !SvPOK(*up))
617 (void)sv_2pv(*up, &na);
621 max = --up - myorigmark;
634 AvREAL_off(sortstack);
635 av_extend(sortstack, 32);
637 SWITCHSTACK(curstack, sortstack);
638 if (sortstash != stash) {
639 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
640 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
644 SAVESPTR(GvSV(firstgv));
645 SAVESPTR(GvSV(secondgv));
646 PUSHBLOCK(cx, CXt_LOOP, stack_base);
647 sortcxix = cxstack_ix;
649 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
652 SWITCHSTACK(sortstack, oldstack);
658 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
659 qsort((char*)(ORIGMARK+1), max, sizeof(SV*),
660 (op->op_private & OPpLOCALE) ? sortcmp_locale : sortcmp);
663 stack_sp = ORIGMARK + max;
671 if (GIMME == G_ARRAY)
672 return cCONDOP->op_true;
673 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
680 if (GIMME == G_ARRAY) {
681 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
685 SV *targ = PAD_SV(op->op_targ);
687 if ((op->op_private & OPpFLIP_LINENUM)
688 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
690 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
691 if (op->op_flags & OPf_SPECIAL) {
698 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
711 if (GIMME == G_ARRAY) {
717 if (SvNIOKp(left) || !SvPOKp(left) ||
718 (looks_like_number(left) && *SvPVX(left) != '0') )
723 EXTEND_MORTAL(max - i + 1);
724 EXTEND(SP, max - i + 1);
727 sv = sv_2mortal(newSViv(i++));
732 SV *final = sv_mortalcopy(right);
734 char *tmps = SvPV(final, len);
736 sv = sv_mortalcopy(left);
737 while (!SvNIOKp(sv) && SvCUR(sv) <= len &&
738 strNE(SvPVX(sv),tmps) ) {
740 sv = sv_2mortal(newSVsv(sv));
743 if (strEQ(SvPVX(sv),tmps))
749 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
751 if ((op->op_private & OPpFLIP_LINENUM)
752 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
754 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
755 sv_catpv(targ, "E0");
770 register CONTEXT *cx;
772 for (i = cxstack_ix; i >= 0; i--) {
774 switch (cx->cx_type) {
777 warn("Exiting substitution via %s", op_name[op->op_type]);
781 warn("Exiting subroutine via %s", op_name[op->op_type]);
785 warn("Exiting eval via %s", op_name[op->op_type]);
788 if (!cx->blk_loop.label ||
789 strNE(label, cx->blk_loop.label) ) {
790 DEBUG_l(deb("(Skipping label #%d %s)\n",
791 i, cx->blk_loop.label));
794 DEBUG_l( deb("(Found label #%d %s)\n", i, label));
806 cxix = dopoptosub(cxstack_ix);
810 if (cxstack[cxix].blk_gimme == G_ARRAY)
817 dopoptosub(startingblock)
821 register CONTEXT *cx;
822 for (i = startingblock; i >= 0; i--) {
824 switch (cx->cx_type) {
829 DEBUG_l( deb("(Found sub #%d)\n", i));
837 dopoptoeval(startingblock)
841 register CONTEXT *cx;
842 for (i = startingblock; i >= 0; i--) {
844 switch (cx->cx_type) {
848 DEBUG_l( deb("(Found eval #%d)\n", i));
856 dopoptoloop(startingblock)
860 register CONTEXT *cx;
861 for (i = startingblock; i >= 0; i--) {
863 switch (cx->cx_type) {
866 warn("Exiting substitution via %s", op_name[op->op_type]);
870 warn("Exiting subroutine via %s", op_name[op->op_type]);
874 warn("Exiting eval via %s", op_name[op->op_type]);
877 DEBUG_l( deb("(Found loop #%d)\n", i));
888 register CONTEXT *cx;
892 while (cxstack_ix > cxix) {
893 cx = &cxstack[cxstack_ix--];
894 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
895 block_type[cx->cx_type]));
896 /* Note: we don't need to restore the base context info till the end. */
897 switch (cx->cx_type) {
919 register CONTEXT *cx;
925 STRLEN klen = strlen(message);
927 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
930 static char prefix[] = "\t(in cleanup) ";
931 sv_upgrade(*svp, SVt_IV);
932 (void)SvIOK_only(*svp);
933 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
934 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
935 sv_catpvn(GvSV(errgv), message, klen);
941 sv_setpv(GvSV(errgv), message);
943 cxix = dopoptoeval(cxstack_ix);
947 if (cxix < cxstack_ix)
951 if (cx->cx_type != CXt_EVAL) {
952 PerlIO_printf(PerlIO_stderr(), "panic: die %s", message);
957 if (gimme == G_SCALAR)
958 *++newsp = &sv_undef;
963 if (optype == OP_REQUIRE)
964 DIE("%s", SvPVx(GvSV(errgv), na));
968 PerlIO_printf(PerlIO_stderr(), "%s",message);
969 PerlIO_flush(PerlIO_stderr());
975 (void)UNLINK(e_tmpname);
979 statusvalue = SHIFTSTATUS(statusvalue);
981 my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT);
983 my_exit((I32)((errno&255)?errno:((statusvalue&255)?statusvalue:255)));
991 if (SvTRUE(left) != SvTRUE(right))
1003 RETURNOP(cLOGOP->op_other);
1012 RETURNOP(cLOGOP->op_other);
1019 SV** mark = (stack_base + *markstack_ptr + 1);
1021 while (mark < sp) { /* emulate old interface */
1026 return pp_entersub();
1033 register I32 cxix = dopoptosub(cxstack_ix);
1034 register CONTEXT *cx;
1044 if (GIMME != G_ARRAY)
1048 if (DBsub && cxix >= 0 &&
1049 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1053 cxix = dopoptosub(cxix - 1);
1055 cx = &cxstack[cxix];
1056 if (cxstack[cxix].cx_type == CXt_SUB) {
1057 dbcxix = dopoptosub(cxix - 1);
1058 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1059 field below is defined for any cx. */
1060 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1061 cx = &cxstack[dbcxix];
1064 if (GIMME != G_ARRAY) {
1067 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1072 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1073 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1074 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1077 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
1079 gv_efullname3(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch);
1080 PUSHs(sv_2mortal(sv));
1081 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1084 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1085 PUSHs(sv_2mortal(newSViv(0)));
1087 PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
1088 if (cx->cx_type == CXt_EVAL) {
1089 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1090 PUSHs(cx->blk_eval.cur_text);
1093 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1094 /* Require, put the name. */
1095 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1099 else if (cx->cx_type == CXt_SUB &&
1100 cx->blk_sub.hasargs &&
1101 curcop->cop_stash == debstash)
1103 AV *ary = cx->blk_sub.argarray;
1104 int off = AvARRAY(ary) - AvALLOC(ary);
1108 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1111 AvREAL_off(dbargs); /* XXX Should be REIFY */
1114 if (AvMAX(dbargs) < AvFILL(ary) + off)
1115 av_extend(dbargs, AvFILL(ary) + off);
1116 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1117 AvFILL(dbargs) = AvFILL(ary) + off;
1127 SV **str1 = (SV **) a;
1128 SV **str2 = (SV **) b;
1129 I32 oldsaveix = savestack_ix;
1130 I32 oldscopeix = scopestack_ix;
1132 GvSV(firstgv) = *str1;
1133 GvSV(secondgv) = *str2;
1134 stack_sp = stack_base;
1137 if (stack_sp != stack_base + 1)
1138 croak("Sort subroutine didn't return single value");
1139 if (!SvNIOKp(*stack_sp))
1140 croak("Sort subroutine didn't return a numeric value");
1141 result = SvIV(*stack_sp);
1142 while (scopestack_ix > oldscopeix) {
1145 leave_scope(oldsaveix);
1154 return sv_cmp(*(SV **)a, *(SV **)b);
1158 sortcmp_locale(a, b)
1162 return sv_cmp_locale(*(SV **)a, *(SV **)b);
1174 sv_reset(tmps, curcop->cop_stash);
1187 TAINT_NOT; /* Each statement is presumed innocent */
1188 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1191 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1195 register CONTEXT *cx;
1196 I32 gimme = G_ARRAY;
1203 DIE("No DB::DB routine defined");
1205 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
1217 push_return(op->op_next);
1218 PUSHBLOCK(cx, CXt_SUB, sp);
1221 (void)SvREFCNT_inc(cv);
1223 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1224 RETURNOP(CvSTART(cv));
1238 register CONTEXT *cx;
1246 svp = &curpad[op->op_targ]; /* "my" variable */
1248 svp = &GvSV((GV*)POPs); /* symbol table variable */
1254 PUSHBLOCK(cx, CXt_LOOP, SP);
1255 PUSHLOOP(cx, svp, MARK);
1256 if (op->op_flags & OPf_STACKED)
1257 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1259 cx->blk_loop.iterary = curstack;
1260 AvFILL(curstack) = sp - stack_base;
1261 cx->blk_loop.iterix = MARK - stack_base;
1270 register CONTEXT *cx;
1277 PUSHBLOCK(cx, CXt_LOOP, SP);
1278 PUSHLOOP(cx, 0, SP);
1286 register CONTEXT *cx;
1295 if (gimme == G_SCALAR) {
1296 if (op->op_private & OPpLEAVE_VOID)
1300 *++newsp = sv_mortalcopy(*SP);
1302 *++newsp = &sv_undef;
1307 *++newsp = sv_mortalcopy(*++mark);
1309 curpm = newpm; /* Don't pop $1 et al till now */
1321 register CONTEXT *cx;
1327 if (curstack == sortstack) {
1328 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
1329 if (cxstack_ix > sortcxix)
1331 AvARRAY(curstack)[1] = *SP;
1332 stack_sp = stack_base + 1;
1337 cxix = dopoptosub(cxstack_ix);
1339 DIE("Can't return outside a subroutine");
1340 if (cxix < cxstack_ix)
1344 switch (cx->cx_type) {
1350 if (optype == OP_REQUIRE &&
1351 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1353 char *name = cx->blk_eval.old_name;
1354 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1355 DIE("%s did not return a true value", name);
1359 DIE("panic: return");
1363 if (gimme == G_SCALAR) {
1365 *++newsp = sv_mortalcopy(*SP);
1367 *++newsp = &sv_undef;
1371 *++newsp = sv_mortalcopy(*++MARK);
1373 curpm = newpm; /* Don't pop $1 et al till now */
1377 return pop_return();
1384 register CONTEXT *cx;
1390 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
1392 if (op->op_flags & OPf_SPECIAL) {
1393 cxix = dopoptoloop(cxstack_ix);
1395 DIE("Can't \"last\" outside a block");
1398 cxix = dopoptolabel(cPVOP->op_pv);
1400 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1402 if (cxix < cxstack_ix)
1406 switch (cx->cx_type) {
1409 nextop = cx->blk_loop.last_op->op_next;
1414 nextop = pop_return();
1418 nextop = pop_return();
1425 if (gimme == G_SCALAR) {
1427 *++newsp = sv_mortalcopy(*SP);
1429 *++newsp = &sv_undef;
1433 *++newsp = sv_mortalcopy(*++mark);
1435 curpm = newpm; /* Don't pop $1 et al till now */
1445 register CONTEXT *cx;
1448 if (op->op_flags & OPf_SPECIAL) {
1449 cxix = dopoptoloop(cxstack_ix);
1451 DIE("Can't \"next\" outside a block");
1454 cxix = dopoptolabel(cPVOP->op_pv);
1456 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1458 if (cxix < cxstack_ix)
1462 oldsave = scopestack[scopestack_ix - 1];
1463 LEAVE_SCOPE(oldsave);
1464 return cx->blk_loop.next_op;
1470 register CONTEXT *cx;
1473 if (op->op_flags & OPf_SPECIAL) {
1474 cxix = dopoptoloop(cxstack_ix);
1476 DIE("Can't \"redo\" outside a block");
1479 cxix = dopoptolabel(cPVOP->op_pv);
1481 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1483 if (cxix < cxstack_ix)
1487 oldsave = scopestack[scopestack_ix - 1];
1488 LEAVE_SCOPE(oldsave);
1489 return cx->blk_loop.redo_op;
1492 static OP* lastgotoprobe;
1495 dofindlabel(op,label,opstack)
1503 if (op->op_type == OP_LEAVE ||
1504 op->op_type == OP_SCOPE ||
1505 op->op_type == OP_LEAVELOOP ||
1506 op->op_type == OP_LEAVETRY)
1507 *ops++ = cUNOP->op_first;
1509 if (op->op_flags & OPf_KIDS) {
1510 /* First try all the kids at this level, since that's likeliest. */
1511 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1512 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1513 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1516 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1517 if (kid == lastgotoprobe)
1519 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1520 if (ops > opstack &&
1521 (ops[-1]->op_type == OP_NEXTSTATE ||
1522 ops[-1]->op_type == OP_DBSTATE))
1527 if (op = dofindlabel(kid,label,ops))
1537 return pp_goto(ARGS);
1546 register CONTEXT *cx;
1549 int do_dump = (op->op_type == OP_DUMP);
1552 if (op->op_flags & OPf_STACKED) {
1555 /* This egregious kludge implements goto &subroutine */
1556 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1558 register CONTEXT *cx;
1559 CV* cv = (CV*)SvRV(sv);
1564 if (!CvROOT(cv) && !CvXSUB(cv)) {
1566 SV *tmpstr = sv_newmortal();
1567 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1568 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1570 DIE("Goto undefined subroutine");
1573 /* First do some returnish stuff. */
1574 cxix = dopoptosub(cxstack_ix);
1576 DIE("Can't goto subroutine outside a subroutine");
1577 if (cxix < cxstack_ix)
1581 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1582 AV* av = cx->blk_sub.argarray;
1584 items = AvFILL(av) + 1;
1586 EXTEND(stack_sp, items); /* @_ could have been extended. */
1587 Copy(AvARRAY(av), stack_sp, items, SV*);
1589 SvREFCNT_dec(GvAV(defgv));
1590 GvAV(defgv) = cx->blk_sub.savearray;
1594 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1595 SvREFCNT_dec(cx->blk_sub.cv);
1596 oldsave = scopestack[scopestack_ix - 1];
1597 LEAVE_SCOPE(oldsave);
1599 /* Now do some callish stuff. */
1602 if (CvOLDSTYLE(cv)) {
1603 I32 (*fp3)_((int,int,int));
1608 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1609 items = (*fp3)(CvXSUBANY(cv).any_i32,
1610 mark - stack_base + 1,
1612 sp = stack_base + items;
1615 stack_sp--; /* There is no cv arg. */
1616 (void)(*CvXSUB(cv))(cv);
1619 return pop_return();
1622 AV* padlist = CvPADLIST(cv);
1623 SV** svp = AvARRAY(padlist);
1624 cx->blk_sub.cv = cv;
1625 cx->blk_sub.olddepth = CvDEPTH(cv);
1627 if (CvDEPTH(cv) < 2)
1628 (void)SvREFCNT_inc(cv);
1629 else { /* save temporaries on recursion? */
1630 if (CvDEPTH(cv) == 100 && dowarn)
1631 sub_crush_depth(cv);
1632 if (CvDEPTH(cv) > AvFILL(padlist)) {
1633 AV *newpad = newAV();
1634 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1635 I32 ix = AvFILL((AV*)svp[1]);
1636 svp = AvARRAY(svp[0]);
1637 for ( ;ix > 0; ix--) {
1638 if (svp[ix] != &sv_undef) {
1639 char *name = SvPVX(svp[ix]);
1640 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
1643 /* outer lexical or anon code */
1644 av_store(newpad, ix,
1645 SvREFCNT_inc(oldpad[ix]) );
1647 else { /* our own lexical */
1649 av_store(newpad, ix, sv = (SV*)newAV());
1650 else if (*name == '%')
1651 av_store(newpad, ix, sv = (SV*)newHV());
1653 av_store(newpad, ix, sv = NEWSV(0,0));
1658 av_store(newpad, ix, sv = NEWSV(0,0));
1662 if (cx->blk_sub.hasargs) {
1665 av_store(newpad, 0, (SV*)av);
1666 AvFLAGS(av) = AVf_REIFY;
1668 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1669 AvFILL(padlist) = CvDEPTH(cv);
1670 svp = AvARRAY(padlist);
1674 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1675 if (cx->blk_sub.hasargs) {
1676 AV* av = (AV*)curpad[0];
1679 cx->blk_sub.savearray = GvAV(defgv);
1680 cx->blk_sub.argarray = av;
1681 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1684 if (items >= AvMAX(av) + 1) {
1686 if (AvARRAY(av) != ary) {
1687 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1688 SvPVX(av) = (char*)ary;
1690 if (items >= AvMAX(av) + 1) {
1691 AvMAX(av) = items - 1;
1692 Renew(ary,items+1,SV*);
1694 SvPVX(av) = (char*)ary;
1697 Copy(mark,AvARRAY(av),items,SV*);
1698 AvFILL(av) = items - 1;
1706 if (perldb && curstash != debstash) {
1708 * We do not care about using sv to call CV;
1709 * it's for informational purposes only.
1711 SV *sv = GvSV(DBsub);
1713 gv_efullname3(sv, CvGV(cv), Nullch);
1715 RETURNOP(CvSTART(cv));
1719 label = SvPV(sv,na);
1721 else if (op->op_flags & OPf_SPECIAL) {
1723 DIE("goto must have label");
1726 label = cPVOP->op_pv;
1728 if (label && *label) {
1735 for (ix = cxstack_ix; ix >= 0; ix--) {
1737 switch (cx->cx_type) {
1739 gotoprobe = CvROOT(cx->blk_sub.cv);
1742 gotoprobe = eval_root; /* XXX not good for nested eval */
1745 gotoprobe = cx->blk_oldcop->op_sibling;
1751 gotoprobe = cx->blk_oldcop->op_sibling;
1753 gotoprobe = main_root;
1759 gotoprobe = main_root;
1762 retop = dofindlabel(gotoprobe, label, enterops);
1765 lastgotoprobe = gotoprobe;
1768 DIE("Can't find label %s", label);
1770 /* pop unwanted frames */
1772 if (ix < cxstack_ix) {
1779 oldsave = scopestack[scopestack_ix];
1780 LEAVE_SCOPE(oldsave);
1783 /* push wanted frames */
1785 if (*enterops && enterops[1]) {
1787 for (ix = 1; enterops[ix]; ix++) {
1797 if (!retop) retop = main_start;
1804 restartop = 0; /* hmm, must be GNU unexec().. */
1808 if (curstack == signalstack) {
1810 Siglongjmp(top_env, 3);
1834 double value = SvNVx(GvSV(cCOP->cop_gv));
1835 register I32 match = I_32(value);
1838 if (((double)match) > value)
1839 --match; /* was fractional--truncate other way */
1841 match -= cCOP->uop.scop.scop_offset;
1844 else if (match > cCOP->uop.scop.scop_max)
1845 match = cCOP->uop.scop.scop_max;
1846 op = cCOP->uop.scop.scop_next[match];
1856 op = op->op_next; /* can't assume anything */
1858 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1859 match -= cCOP->uop.scop.scop_offset;
1862 else if (match > cCOP->uop.scop.scop_max)
1863 match = cCOP->uop.scop.scop_max;
1864 op = cCOP->uop.scop.scop_next[match];
1873 save_lines(array, sv)
1877 register char *s = SvPVX(sv);
1878 register char *send = SvPVX(sv) + SvCUR(sv);
1880 register I32 line = 1;
1882 while (s && s < send) {
1883 SV *tmpstr = NEWSV(85,0);
1885 sv_upgrade(tmpstr, SVt_PVMG);
1886 t = strchr(s, '\n');
1892 sv_setpvn(tmpstr, s, t - s);
1893 av_store(array, line++, tmpstr);
1912 /* set up a scratch pad */
1917 SAVESPTR(comppad_name);
1918 SAVEI32(comppad_name_fill);
1919 SAVEI32(min_intro_pending);
1920 SAVEI32(max_intro_pending);
1924 compcv = (CV*)NEWSV(1104,0);
1925 sv_upgrade((SV *)compcv, SVt_PVCV);
1926 CvUNIQUE_on(compcv);
1929 comppad_name = newAV();
1930 comppad_name_fill = 0;
1931 min_intro_pending = 0;
1932 av_push(comppad, Nullsv);
1933 curpad = AvARRAY(comppad);
1936 comppadlist = newAV();
1937 AvREAL_off(comppadlist);
1938 av_store(comppadlist, 0, (SV*)comppad_name);
1939 av_store(comppadlist, 1, (SV*)comppad);
1940 CvPADLIST(compcv) = comppadlist;
1942 if (saveop->op_type != OP_REQUIRE)
1943 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(caller);
1947 /* make sure we compile in the right package */
1949 newstash = curcop->cop_stash;
1950 if (curstash != newstash) {
1952 curstash = newstash;
1956 SAVEFREESV(beginav);
1958 /* try to compile it */
1962 curcop = &compiling;
1963 curcop->cop_arybase = 0;
1965 rs = newSVpv("\n", 1);
1966 if (saveop->op_flags & OPf_SPECIAL)
1969 sv_setpv(GvSV(errgv),"");
1970 if (yyparse() || error_count || !eval_root) {
1981 SP = stack_base + POPMARK; /* pop original mark */
1987 if (optype == OP_REQUIRE)
1988 DIE("%s", SvPVx(GvSV(errgv), na));
1990 rs = SvREFCNT_inc(nrs);
1994 rs = SvREFCNT_inc(nrs);
1995 compiling.cop_line = 0;
1996 SAVEFREEOP(eval_root);
1997 if (gimme & G_ARRAY)
2002 DEBUG_x(dump_eval());
2004 /* Register with debugger: */
2006 if (perldb && saveop->op_type == OP_REQUIRE) {
2007 CV *cv = perl_get_cv("DB::postponed", FALSE);
2012 XPUSHs((SV*)compiling.cop_filegv);
2014 perl_call_sv((SV*)cv, G_DISCARD);
2018 /* compiled okay, so do it */
2020 SP = stack_base + POPMARK; /* pop original mark */
2021 RETURNOP(eval_start);
2027 register CONTEXT *cx;
2032 I32 gimme = G_SCALAR;
2033 PerlIO *tryrsfp = 0;
2036 if (SvNIOKp(sv) && !SvPOKp(sv)) {
2037 SET_NUMERIC_STANDARD();
2038 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2039 DIE("Perl %s required--this is only version %s, stopped",
2040 SvPV(sv,na),patchlevel);
2043 name = SvPV(sv, na);
2045 DIE("Null filename used");
2046 TAINT_PROPER("require");
2047 if (op->op_type == OP_REQUIRE &&
2048 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2052 /* prepare to compile file */
2054 tmpname = savepv(name);
2055 if (*tmpname == '/' ||
2057 (tmpname[1] == '/' ||
2058 (tmpname[1] == '.' && tmpname[2] == '/')))
2060 || (tmpname[0] && tmpname[1] == ':')
2063 || (strchr(tmpname,':') || ((*tmpname == '[' || *tmpname == '<') &&
2064 (isALNUM(tmpname[1]) || strchr("$-_]>",tmpname[1]))))
2068 tryrsfp = PerlIO_open(tmpname,"r");
2071 AV *ar = GvAVn(incgv);
2074 char unixified[256];
2075 if (tounixspec_ts(tmpname,unixified) != NULL)
2076 for (i = 0; i <= AvFILL(ar); i++) {
2077 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
2079 strcat(buf,unixified);
2081 for (i = 0; i <= AvFILL(ar); i++) {
2082 (void)sprintf(buf, "%s/%s",
2083 SvPVx(*av_fetch(ar, i, TRUE), na), name);
2085 tryrsfp = PerlIO_open(buf, "r");
2089 if (*s == '.' && s[1] == '/')
2092 tmpname = savepv(s);
2097 SAVESPTR(compiling.cop_filegv);
2098 compiling.cop_filegv = gv_fetchfile(tmpname);
2102 if (op->op_type == OP_REQUIRE) {
2103 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2104 if (instr(tokenbuf,".h "))
2105 strcat(tokenbuf," (change .h to .ph maybe?)");
2106 if (instr(tokenbuf,".ph "))
2107 strcat(tokenbuf," (did you run h2ph?)");
2114 /* Assume success here to prevent recursive requirement. */
2115 (void)hv_store(GvHVn(incgv), name, strlen(name),
2116 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2120 lex_start(sv_2mortal(newSVpv("",0)));
2122 save_aptr(&rsfp_filters);
2123 rsfp_filters = NULL;
2127 name = savepv(name);
2132 /* switch to eval mode */
2134 push_return(op->op_next);
2135 PUSHBLOCK(cx, CXt_EVAL, SP);
2136 PUSHEVAL(cx, name, compiling.cop_filegv);
2138 compiling.cop_line = 0;
2141 return doeval(G_SCALAR);
2146 return pp_require(ARGS);
2152 register CONTEXT *cx;
2154 I32 gimme = GIMME, was = sub_generation;
2155 char tmpbuf[32], *safestr;
2159 if (!SvPV(sv,len) || !len)
2161 TAINT_PROPER("eval");
2167 /* switch to eval mode */
2169 SAVESPTR(compiling.cop_filegv);
2170 sprintf(tmpbuf, "_<(eval %d)", ++evalseq);
2171 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2172 compiling.cop_line = 1;
2173 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2174 deleting the eval's FILEGV from the stash before gv_check() runs
2175 (i.e. before run-time proper). To work around the coredump that
2176 ensues, we always turn GvMULTI_on for any globals that were
2177 introduced within evals. See force_ident(). GSAR 96-10-12 */
2178 safestr = savepv(tmpbuf);
2179 SAVEDELETE(defstash, safestr, strlen(safestr));
2181 hints = op->op_targ;
2183 push_return(op->op_next);
2184 PUSHBLOCK(cx, CXt_EVAL, SP);
2185 PUSHEVAL(cx, 0, compiling.cop_filegv);
2187 /* prepare to compile string */
2189 if (perldb && curstash != debstash)
2190 save_lines(GvAV(compiling.cop_filegv), linestr);
2192 ret = doeval(gimme);
2193 if (perldb && was != sub_generation) { /* Some subs defined here. */
2194 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
2206 register CONTEXT *cx;
2208 U8 save_flags = op -> op_flags;
2213 retop = pop_return();
2215 if (gimme == G_SCALAR) {
2216 if (op->op_private & OPpLEAVE_VOID)
2221 if (SvFLAGS(TOPs) & SVs_TEMP)
2224 *MARK = sv_mortalcopy(TOPs);
2234 for (mark = newsp + 1; mark <= SP; mark++)
2235 if (!(SvFLAGS(*mark) & SVs_TEMP))
2236 *mark = sv_mortalcopy(*mark);
2237 /* in case LEAVE wipes old return values */
2239 curpm = newpm; /* Don't pop $1 et al till now */
2241 if (optype == OP_REQUIRE &&
2242 !(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
2243 char *name = cx->blk_eval.old_name;
2245 /* Unassume the success we assumed earlier. */
2246 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
2247 retop = die("%s did not return a true value", name);
2252 if (!(save_flags & OPf_SPECIAL))
2253 sv_setpv(GvSV(errgv),"");
2261 register CONTEXT *cx;
2267 push_return(cLOGOP->op_other->op_next);
2268 PUSHBLOCK(cx, CXt_EVAL, SP);
2270 eval_root = op; /* Only needed so that goto works right. */
2273 sv_setpv(GvSV(errgv),"");
2284 register CONTEXT *cx;
2291 if (gimme == G_SCALAR) {
2292 if (op->op_private & OPpLEAVE_VOID)
2297 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2300 *MARK = sv_mortalcopy(TOPs);
2310 for (mark = newsp + 1; mark <= SP; mark++)
2311 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
2312 *mark = sv_mortalcopy(*mark);
2313 /* in case LEAVE wipes old return values */
2315 curpm = newpm; /* Don't pop $1 et al till now */
2318 sv_setpv(GvSV(errgv),"");
2327 register char *s = SvPV_force(sv, len);
2328 register char *send = s + len;
2329 register char *base;
2330 register I32 skipspaces = 0;
2333 bool postspace = FALSE;
2341 croak("Null picture in formline");
2343 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
2348 *fpc++ = FF_LINEMARK;
2349 noblank = repeat = FALSE;
2367 case ' ': case '\t':
2378 *fpc++ = FF_LITERAL;
2386 *fpc++ = skipspaces;
2390 *fpc++ = FF_NEWLINE;
2394 arg = fpc - linepc + 1;
2401 *fpc++ = FF_LINEMARK;
2402 noblank = repeat = FALSE;
2411 ischop = s[-1] == '^';
2417 arg = (s - base) - 1;
2419 *fpc++ = FF_LITERAL;
2428 *fpc++ = FF_LINEGLOB;
2430 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2431 arg = ischop ? 512 : 0;
2441 arg |= 256 + (s - f);
2443 *fpc++ = s - base; /* fieldsize for FETCH */
2444 *fpc++ = FF_DECIMAL;
2449 bool ismore = FALSE;
2452 while (*++s == '>') ;
2453 prespace = FF_SPACE;
2455 else if (*s == '|') {
2456 while (*++s == '|') ;
2457 prespace = FF_HALFSPACE;
2462 while (*++s == '<') ;
2465 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2469 *fpc++ = s - base; /* fieldsize for FETCH */
2471 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2489 { /* need to jump to the next word */
2491 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2492 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2493 s = SvPVX(sv) + SvCUR(sv) + z;
2495 Copy(fops, s, arg, U16);
2497 sv_magic(sv, Nullsv, 'f', Nullch, 0);