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 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
14 * Awake! Awake! Fear, Fire, Foes! Awake!
33 TAINT_NOT; /* Each statement is presumed innocent */
34 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
43 if (op->op_private & OPpLVAL_INTRO)
44 PUSHs(save_scalar(cGVOP->op_gv));
46 PUSHs(GvSV(cGVOP->op_gv));
67 sv_setpvn(TARG,s,len);
75 XPUSHs((SV*)cGVOP->op_gv);
86 RETURNOP(cLOGOP->op_other);
93 if (op->op_private & OPpASSIGN_BACKWARDS) {
95 temp = left; left = right; right = temp;
97 if (tainting && tainted && (!SvGMAGICAL(left) || !SvSMAGICAL(left) ||
98 !mg_find(left, 't'))) {
101 SvSetSV(right, left);
111 RETURNOP(cCONDOP->op_true);
113 RETURNOP(cCONDOP->op_false);
119 TAINT_NOT; /* Each statement is presumed innocent */
120 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
122 oldsave = scopestack[scopestack_ix - 1];
123 LEAVE_SCOPE(oldsave);
129 dSP; tryAMAGICbinSET(seq,0);
132 SETs( sv_eq(left, right) ? &sv_yes : &sv_no );
139 dSP; dATARGET; dPOPTOPssrl;
144 sv_setpvn(TARG,s,len);
147 sv_catpvn(TARG,s,len);
156 if (op->op_private & OPpLVAL_INTRO)
157 SAVECLEARSV(curpad[op->op_targ]);
163 last_in_gv = (GV*)(*stack_sp--);
164 return do_readline();
169 dSP; tryAMAGICbinSET(eq,0);
172 SETs((TOPn == value) ? &sv_yes : &sv_no);
192 RETURNOP(cLOGOP->op_other);
198 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
201 SETn( left + right );
209 AV *av = GvAV((GV*)cSVOP->op_sv);
210 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
211 PUSHs(svp ? *svp : &sv_undef);
219 do_join(TARG, *MARK, MARK, SP);
232 /* Oversized hot code. */
236 dSP; dMARK; dORIGMARK;
241 if (op->op_flags & OPf_STACKED)
245 if (!(io = GvIO(gv))) {
247 warn("Filehandle %s never opened", GvNAME(gv));
251 else if (!(fp = IoOFP(io))) {
254 warn("Filehandle %s opened only for input", GvNAME(gv));
256 warn("print on closed filehandle %s", GvNAME(gv));
265 if (!do_print(*MARK, fp))
269 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
278 if (!do_print(*MARK, fp))
287 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
290 if (IoFLAGS(io) & IOf_FLUSH)
291 if (fflush(fp) == EOF)
314 if (SvTYPE(av) != SVt_PVAV)
315 DIE("Not an ARRAY reference");
316 if (op->op_private & OPpLVAL_INTRO)
317 av = (AV*)save_svref((SV**)sv);
318 if (op->op_flags & OPf_REF) {
324 if (SvTYPE(sv) == SVt_PVAV) {
326 if (op->op_flags & OPf_REF) {
332 if (SvTYPE(sv) != SVt_PVGV) {
333 if (SvGMAGICAL(sv)) {
339 if (op->op_flags & OPf_REF ||
340 op->op_private & HINT_STRICT_REFS)
341 DIE(no_usym, "an ARRAY");
344 if (op->op_private & HINT_STRICT_REFS)
345 DIE(no_symref, "an ARRAY");
346 sv = (SV*)gv_fetchpv(SvPV(sv, na), TRUE, SVt_PVAV);
349 if (op->op_private & OPpLVAL_INTRO)
351 if (op->op_flags & OPf_REF) {
358 if (GIMME == G_ARRAY) {
359 I32 maxarg = AvFILL(av) + 1;
361 Copy(AvARRAY(av), SP+1, maxarg, SV*);
366 I32 maxarg = AvFILL(av) + 1;
382 if (SvTYPE(hv) != SVt_PVHV)
383 DIE("Not a HASH reference");
384 if (op->op_private & OPpLVAL_INTRO)
385 hv = (HV*)save_svref((SV**)sv);
386 if (op->op_flags & OPf_REF) {
392 if (SvTYPE(sv) == SVt_PVHV) {
394 if (op->op_flags & OPf_REF) {
400 if (SvTYPE(sv) != SVt_PVGV) {
401 if (SvGMAGICAL(sv)) {
407 if (op->op_flags & OPf_REF ||
408 op->op_private & HINT_STRICT_REFS)
409 DIE(no_usym, "a HASH");
412 if (op->op_private & HINT_STRICT_REFS)
413 DIE(no_symref, "a HASH");
414 sv = (SV*)gv_fetchpv(SvPV(sv, na), TRUE, SVt_PVHV);
417 if (op->op_private & OPpLVAL_INTRO)
419 if (op->op_flags & OPf_REF) {
426 if (GIMME == G_ARRAY) { /* array wanted */
433 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
446 SV **lastlelem = stack_sp;
447 SV **lastrelem = stack_base + POPMARK;
448 SV **firstrelem = stack_base + POPMARK + 1;
449 SV **firstlelem = lastrelem + 1;
461 delaymagic = DM_DELAY; /* catch simultaneous items */
463 /* If there's a common identifier on both sides we have to take
464 * special care that assigning the identifier on the left doesn't
465 * clobber a value on the right that's used later in the list.
467 if (op->op_private & OPpASSIGN_COMMON) {
468 for (relem = firstrelem; relem <= lastrelem; relem++) {
471 *relem = sv_mortalcopy(sv);
479 while (lelem <= lastlelem) {
481 switch (SvTYPE(sv)) {
484 magic = SvSMAGICAL(ary) != 0;
488 while (relem <= lastrelem) { /* gobble up all the rest */
493 (void)av_store(ary,i++,sv);
503 magic = SvSMAGICAL(hash) != 0;
506 while (relem < lastrelem) { /* gobble up all the rest */
511 sv = &sv_no, relem++;
512 tmps = SvPV(sv, len);
513 tmpstr = NEWSV(29,0);
515 sv_setsv(tmpstr,*relem); /* value */
517 (void)hv_store(hash,tmps,len,tmpstr,0);
524 if (SvTHINKFIRST(sv)) {
525 if (SvREADONLY(sv) && curcop != &compiling) {
526 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
528 if (relem <= lastrelem)
535 if (relem <= lastrelem) {
536 sv_setsv(sv, *relem);
540 sv_setsv(sv, &sv_undef);
545 if (delaymagic & ~DM_DELAY) {
546 if (delaymagic & DM_UID) {
548 (void)setresuid(uid,euid,(Uid_t)-1);
549 #else /* not HAS_SETRESUID */
551 (void)setreuid(uid,euid);
552 #else /* not HAS_SETREUID */
554 if ((delaymagic & DM_UID) == DM_RUID) {
556 delaymagic =~ DM_RUID;
558 #endif /* HAS_SETRUID */
559 #endif /* HAS_SETRESUID */
561 if ((delaymagic & DM_UID) == DM_EUID) {
563 delaymagic =~ DM_EUID;
565 #endif /* HAS_SETEUID */
566 if (delaymagic & DM_UID) {
568 DIE("No setreuid available");
571 #endif /* not HAS_SETREUID */
573 euid = (int)geteuid();
575 if (delaymagic & DM_GID) {
577 (void)setresgid(gid,egid,(Gid_t)-1);
578 #else /* not HAS_SETREGID */
580 (void)setregid(gid,egid);
581 #else /* not HAS_SETREGID */
582 #endif /* not HAS_SETRESGID */
584 if ((delaymagic & DM_GID) == DM_RGID) {
586 delaymagic =~ DM_RGID;
588 #endif /* HAS_SETRGID */
590 (void)setresgid(gid,egid,(Gid_t)-1);
591 #else /* not HAS_SETREGID */
593 if ((delaymagic & DM_GID) == DM_EGID) {
595 delaymagic =~ DM_EGID;
597 #endif /* HAS_SETEGID */
598 if (delaymagic & DM_GID) {
600 DIE("No setregid available");
603 #endif /* not HAS_SETRESGID */
604 #endif /* not HAS_SETREGID */
606 egid = (int)getegid();
608 tainting |= (euid != uid || egid != gid);
611 if (GIMME == G_ARRAY) {
615 SP = firstrelem + (lastlelem - firstlelem);
620 for (relem = firstrelem; relem <= lastrelem; ++relem) {
624 SETi(lastrelem - firstrelem + 1);
635 register PMOP *pm = cPMOP;
642 register REGEXP *rx = pm->op_pmregexp;
646 if (op->op_flags & OPf_STACKED)
655 DIE("panic: do_match");
657 if (pm->op_pmflags & PMf_USED) {
658 if (gimme == G_ARRAY)
663 if (!rx->prelen && curpm) {
665 rx = pm->op_pmregexp;
668 if (global = pm->op_pmflags & PMf_GLOBAL) {
670 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
671 MAGIC* mg = mg_find(TARG, 'g');
672 if (mg && mg->mg_len >= 0)
673 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
676 safebase = (gimme == G_ARRAY) || global;
677 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
679 multiline = pm->op_pmflags & PMf_MULTILINE;
683 if (global && rx->startp[0]) {
688 if (pm->op_pmshort) {
689 if (pm->op_pmflags & PMf_SCANFIRST) {
690 if (SvSCREAM(TARG)) {
691 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
693 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
695 else if (pm->op_pmflags & PMf_ALL)
698 else if (!(s = fbm_instr((unsigned char*)s,
699 (unsigned char*)strend, pm->op_pmshort)))
701 else if (pm->op_pmflags & PMf_ALL)
703 if (s && rx->regback >= 0) {
704 ++BmUSEFUL(pm->op_pmshort);
712 else if (!multiline) {
713 if (*SvPVX(pm->op_pmshort) != *s ||
714 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
715 if (pm->op_pmflags & PMf_FOLD) {
716 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
723 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
724 SvREFCNT_dec(pm->op_pmshort);
725 pm->op_pmshort = Nullsv; /* opt is being useless */
728 if (!rx->nparens && !global) {
729 gimme = G_SCALAR; /* accidental array context? */
732 if (regexec(rx, s, strend, truebase, 0,
733 SvSCREAM(TARG) ? TARG : Nullsv,
736 if (pm->op_pmflags & PMf_ONCE)
737 pm->op_pmflags |= PMf_USED;
745 if (gimme == G_ARRAY) {
749 if (global && !iters)
753 EXTEND(SP, iters + i);
754 for (i = !i; i <= iters; i++) {
755 PUSHs(sv_newmortal());
757 if ((s = rx->startp[i]) && rx->endp[i] ) {
758 len = rx->endp[i] - s;
759 sv_setpvn(*SP, s, len);
763 truebase = rx->subbeg;
764 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
773 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
774 mg = mg_find(TARG, 'g');
776 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
777 mg = mg_find(TARG, 'g');
779 mg->mg_len = rx->startp[0] ? rx->endp[0] - truebase : -1;
785 ++BmUSEFUL(pm->op_pmshort);
787 if (pm->op_pmflags & PMf_ONCE)
788 pm->op_pmflags |= PMf_USED;
790 rx->subbeg = truebase;
793 rx->endp[0] = s + SvCUR(pm->op_pmshort);
800 Safefree(rx->subbase);
801 tmps = rx->subbase = savepvn(t, strend-t);
803 rx->subend = tmps + (strend-t);
804 tmps = rx->startp[0] = tmps + (s - t);
805 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
811 ++BmUSEFUL(pm->op_pmshort);
815 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
816 MAGIC* mg = mg_find(TARG, 'g');
821 if (gimme == G_ARRAY)
834 register IO *io = GvIO(last_in_gv);
835 register I32 type = op->op_type;
841 if (IoFLAGS(io) & IOf_ARGV) {
842 if (IoFLAGS(io) & IOf_START) {
843 IoFLAGS(io) &= ~IOf_START;
845 if (av_len(GvAVn(last_in_gv)) < 0) {
846 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
847 av_push(GvAVn(last_in_gv), tmpstr);
850 fp = nextargv(last_in_gv);
851 if (!fp) { /* Note: fp != IoIFP(io) */
852 (void)do_close(last_in_gv, FALSE); /* now it does*/
853 IoFLAGS(io) |= IOf_START;
856 else if (type == OP_GLOB) {
857 SV *tmpcmd = NEWSV(55, 0);
861 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
862 /* since spawning off a process is a real performance hit */
865 #include <lib$routines.h>
868 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
869 char vmsspec[NAM$C_MAXRSS+1];
870 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
871 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
872 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
875 struct dsc$descriptor_s wilddsc
876 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
877 struct dsc$descriptor_vs rsdsc
878 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
879 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
881 /* We could find out if there's an explicit dev/dir or version
882 by peeking into lib$find_file's internal context at
883 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
884 but that's unsupported, so I don't want to do it now and
885 have it bite someone in the future. */
886 strcat(tmpfnam,tmpnam(NULL));
887 cp = SvPV(tmpglob,i);
889 if (cp[i] == ';') hasver = 1;
898 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
903 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
904 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
905 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
906 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
907 &dfltdsc,NULL,NULL,NULL))&1)) {
908 end = rstr + (unsigned long int) *rslt;
909 if (!hasver) while (*end != ';') end--;
910 *(end++) = '\n'; *end = '\0';
911 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
913 if (isunix) trim_unixpath(SvPVX(tmpglob),rstr);
918 while (*(--begin) != ']' && *begin != '>') ;
921 ok = (fputs(begin,tmpfp) != EOF);
923 if (cxt) (void)lib$find_file_end(&cxt);
924 if (ok && sts != RMS$_NMF) ok = 0;
931 IoIFP(io) = fp = tmpfp;
937 sv_setpv(tmpcmd, "perlglob ");
938 sv_catsv(tmpcmd, tmpglob);
939 sv_catpv(tmpcmd, " |");
942 sv_setpvn(tmpcmd, cshname, cshlen);
943 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
944 sv_catsv(tmpcmd, tmpglob);
945 sv_catpv(tmpcmd, "'|");
947 sv_setpv(tmpcmd, "echo ");
948 sv_catsv(tmpcmd, tmpglob);
950 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
952 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
956 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),Nullfp);
962 else if (type == OP_GLOB)
967 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
968 if (GIMME == G_SCALAR) {
969 (void)SvOK_off(TARG);
974 if (GIMME == G_ARRAY) {
975 sv = sv_2mortal(NEWSV(57, 80));
980 (void)SvUPGRADE(sv, SVt_PV);
981 tmplen = SvLEN(sv); /* remember if already alloced */
983 Sv_Grow(sv, 80); /* try short-buffering it */
984 if (type == OP_RCATLINE)
990 if (!sv_gets(sv, fp, offset)) {
992 if (IoFLAGS(io) & IOf_ARGV) {
993 fp = nextargv(last_in_gv);
996 (void)do_close(last_in_gv, FALSE);
997 IoFLAGS(io) |= IOf_START;
999 else if (type == OP_GLOB) {
1000 (void)do_close(last_in_gv, FALSE);
1002 if (GIMME == G_SCALAR) {
1003 (void)SvOK_off(TARG);
1012 SvTAINT(sv); /* Anything from the outside world...*/
1014 if (type == OP_GLOB) {
1019 if (*SvEND(sv) == rschar)
1023 for (tmps = SvPVX(sv); *tmps; tmps++)
1024 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1025 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1027 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1028 (void)POPs; /* Unmatched wildcard? Chuck it... */
1032 if (GIMME == G_ARRAY) {
1033 if (SvLEN(sv) - SvCUR(sv) > 20) {
1034 SvLEN_set(sv, SvCUR(sv)+1);
1035 Renew(SvPVX(sv), SvLEN(sv), char);
1037 sv = sv_2mortal(NEWSV(58, 80));
1040 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1041 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1045 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1046 Renew(SvPVX(sv), SvLEN(sv), char);
1055 register CONTEXT *cx;
1059 * We don't just use the GIMME macro here because it assumes there's
1060 * already a context, which ain't necessarily so at initial startup.
1063 if (op->op_flags & OPf_KNOW)
1064 gimme = op->op_flags & OPf_LIST;
1065 else if (cxstack_ix >= 0)
1066 gimme = cxstack[cxstack_ix].blk_gimme;
1073 PUSHBLOCK(cx, CXt_BLOCK, sp);
1084 char *key = SvPV(keysv, keylen);
1086 I32 lval = op->op_flags & OPf_MOD;
1088 if (SvTYPE(hv) != SVt_PVHV)
1090 svp = hv_fetch(hv, key, keylen, lval);
1092 if (!svp || *svp == &sv_undef)
1094 if (op->op_private & OPpLVAL_INTRO)
1096 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1101 (void)SvUPGRADE(sv, SVt_RV);
1102 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1103 (SV*)newHV() : (SV*)newAV());
1109 PUSHs(svp ? *svp : &sv_undef);
1116 register CONTEXT *cx;
1122 if (op->op_flags & OPf_SPECIAL) {
1123 cx = &cxstack[cxstack_ix];
1124 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1129 if (op->op_flags & OPf_KNOW)
1130 gimme = op->op_flags & OPf_LIST;
1131 else if (cxstack_ix >= 0)
1132 gimme = cxstack[cxstack_ix].blk_gimme;
1136 if (gimme == G_SCALAR) {
1137 if (op->op_private & OPpLEAVE_VOID)
1142 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1145 *MARK = sv_mortalcopy(TOPs);
1154 for (mark = newsp + 1; mark <= SP; mark++)
1155 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1156 *mark = sv_mortalcopy(*mark);
1157 /* in case LEAVE wipes old return values */
1159 curpm = newpm; /* Don't pop $1 et al till now */
1169 register CONTEXT *cx;
1173 cx = &cxstack[cxstack_ix];
1174 if (cx->cx_type != CXt_LOOP)
1175 DIE("panic: pp_iter");
1177 if (cx->blk_loop.iterix >= cx->blk_oldsp)
1180 if (sv = AvARRAY(cx->blk_loop.iterary)[++cx->blk_loop.iterix]) {
1182 *cx->blk_loop.itervar = sv;
1185 *cx->blk_loop.itervar = &sv_undef;
1193 register PMOP *pm = cPMOP;
1208 register REGEXP *rx = pm->op_pmregexp;
1210 int force_on_match = 0;
1212 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1214 if (op->op_flags & OPf_STACKED)
1220 s = SvPV(TARG, len);
1226 DIE("panic: do_subst");
1229 maxiters = (strend - s) + 10;
1231 if (!rx->prelen && curpm) {
1233 rx = pm->op_pmregexp;
1235 safebase = ((!rx || !rx->nparens) && !sawampersand);
1236 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1238 multiline = pm->op_pmflags & PMf_MULTILINE;
1241 if (pm->op_pmshort) {
1242 if (pm->op_pmflags & PMf_SCANFIRST) {
1243 if (SvSCREAM(TARG)) {
1244 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1246 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1249 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1252 if (s && rx->regback >= 0) {
1253 ++BmUSEFUL(pm->op_pmshort);
1261 else if (!multiline) {
1262 if (*SvPVX(pm->op_pmshort) != *s ||
1263 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1264 if (pm->op_pmflags & PMf_FOLD) {
1265 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1272 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1273 SvREFCNT_dec(pm->op_pmshort);
1274 pm->op_pmshort = Nullsv; /* opt is being useless */
1277 once = !(rpm->op_pmflags & PMf_GLOBAL);
1278 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1279 c = SvPV(dstr, clen);
1280 if (clen <= rx->minlen) {
1281 /* can do inplace substitution */
1282 if (regexec(rx, s, strend, orig, 0,
1283 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1284 if (force_on_match) {
1286 s = SvPV_force(TARG, len);
1289 if (rx->subbase) /* oops, no we can't */
1293 SvSCREAM_off(TARG); /* disable possible screamer */
1298 if (m - s > strend - d) { /* faster to shorten from end */
1300 Copy(c, m, clen, char);
1305 Move(d, m, i, char);
1309 SvCUR_set(TARG, m - s);
1310 (void)SvPOK_only(TARG);
1316 else if (i = m - s) { /* faster from front */
1324 Copy(c, m, clen, char);
1325 (void)SvPOK_only(TARG);
1333 Copy(c, d, clen, char);
1334 (void)SvPOK_only(TARG);
1341 (void)SvPOK_only(TARG);
1349 if (iters++ > maxiters)
1350 DIE("Substitution loop");
1355 Move(s, d, i, char);
1359 Copy(c, d, clen, char);
1363 } while (regexec(rx, s, strend, orig, s == m,
1364 Nullsv, TRUE)); /* (don't match same null twice) */
1367 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1368 Move(s, d, i+1, char); /* include the Null */
1370 (void)SvPOK_only(TARG);
1372 PUSHs(sv_2mortal(newSViv((I32)iters)));
1381 if (regexec(rx, s, strend, orig, 0,
1382 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1384 if (force_on_match) {
1386 s = SvPV_force(TARG, len);
1389 dstr = NEWSV(25, sv_len(TARG));
1390 sv_setpvn(dstr, m, s-m);
1393 register CONTEXT *cx;
1395 RETURNOP(cPMOP->op_pmreplroot);
1398 if (iters++ > maxiters)
1399 DIE("Substitution loop");
1400 if (rx->subbase && rx->subbase != orig) {
1405 strend = s + (strend - m);
1408 sv_catpvn(dstr, s, m-s);
1411 sv_catpvn(dstr, c, clen);
1414 } while (regexec(rx, s, strend, orig, s == m, Nullsv,
1416 sv_catpvn(dstr, s, strend - s);
1417 sv_replace(TARG, dstr);
1418 (void)SvPOK_only(TARG);
1420 PUSHs(sv_2mortal(newSViv((I32)iters)));
1427 ++BmUSEFUL(pm->op_pmshort);
1437 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1439 LEAVE; /* exit inner scope */
1442 if (stack_base + *markstack_ptr > sp) {
1445 LEAVE; /* exit outer scope */
1446 (void)POPMARK; /* pop src */
1447 items = --*markstack_ptr - markstack_ptr[-1];
1448 (void)POPMARK; /* pop dst */
1449 SP = stack_base + POPMARK; /* pop original mark */
1450 if (GIMME != G_ARRAY) {
1461 ENTER; /* enter inner scope */
1464 src = stack_base[*markstack_ptr];
1468 RETURNOP(cLOGOP->op_other);
1479 register CONTEXT *cx;
1484 if (gimme == G_SCALAR) {
1487 if (SvFLAGS(TOPs) & SVs_TEMP)
1490 *MARK = sv_mortalcopy(TOPs);
1498 for (mark = newsp + 1; mark <= SP; mark++)
1499 if (!(SvFLAGS(*mark) & SVs_TEMP))
1500 *mark = sv_mortalcopy(*mark);
1501 /* in case LEAVE wipes old return values */
1504 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1505 AV* av = cx->blk_sub.argarray;
1510 curpm = newpm; /* Don't pop $1 et al till now */
1514 return pop_return();
1523 register CONTEXT *cx;
1526 DIE("Not a CODE reference");
1527 switch (SvTYPE(sv)) {
1530 if (sv == &sv_yes) /* unfound import, ignore */
1533 DIE(no_usym, "a subroutine");
1534 if (op->op_private & HINT_STRICT_REFS)
1535 DIE(no_symref, "a subroutine");
1536 gv = gv_fetchpv(SvPV(sv, na), FALSE, SVt_PVCV);
1544 if (SvTYPE(cv) == SVt_PVCV)
1549 DIE("Not a CODE reference");
1554 if (!(cv = GvCV((GV*)sv)))
1555 cv = sv_2cv(sv, &stash, &gv, TRUE);
1564 DIE("Not a CODE reference");
1566 if (!CvROOT(cv) && !CvXSUB(cv)) {
1567 if (gv = CvGV(cv)) {
1568 SV *tmpstr = sv_newmortal();
1570 gv_efullname(tmpstr, gv);
1571 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1572 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1574 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1578 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1580 DIE("Undefined subroutine called");
1583 if ((op->op_private & OPpDEREF_DB) && !CvXSUB(cv)) {
1587 gv_efullname(sv,gv);
1590 DIE("No DBsub routine");
1594 if (CvOLDSTYLE(cv)) {
1595 I32 (*fp3)_((int,int,int));
1597 register I32 items = SP - MARK;
1602 stack_sp = mark + 1;
1603 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1604 items = (*fp3)(CvXSUBANY(cv).any_i32,
1605 MARK - stack_base + 1,
1607 stack_sp = stack_base + items;
1611 (void)(*CvXSUB(cv))(cv);
1618 register I32 items = SP - MARK;
1619 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1621 AV* padlist = CvPADLIST(cv);
1622 SV** svp = AvARRAY(padlist);
1623 push_return(op->op_next);
1624 PUSHBLOCK(cx, CXt_SUB, MARK);
1627 if (CvDEPTH(cv) < 2)
1628 (void)SvREFCNT_inc(cv);
1629 else { /* save temporaries on recursion? */
1630 if (CvDEPTH(cv) == 100 && dowarn)
1631 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1632 if (CvDEPTH(cv) > AvFILL(padlist)) {
1634 AV *newpad = newAV();
1635 I32 ix = AvFILL((AV*)svp[1]);
1636 svp = AvARRAY(svp[0]);
1638 if (svp[ix] != &sv_undef) {
1639 char *name = SvPVX(svp[ix]); /* XXX */
1641 av_store(newpad, ix--, sv = (SV*)newAV());
1642 else if (*name == '%')
1643 av_store(newpad, ix--, sv = (SV*)newHV());
1645 av_store(newpad, ix--, sv = NEWSV(0,0));
1649 av_store(newpad, ix--, sv = NEWSV(0,0));
1653 av = newAV(); /* will be @_ */
1655 av_store(newpad, 0, (SV*)av);
1656 AvFLAGS(av) = AVf_REIFY;
1657 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1658 AvFILL(padlist) = CvDEPTH(cv);
1659 svp = AvARRAY(padlist);
1663 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1665 AV* av = (AV*)curpad[0];
1672 cx->blk_sub.savearray = GvAV(defgv);
1673 cx->blk_sub.argarray = av;
1674 GvAV(defgv) = cx->blk_sub.argarray;
1677 if (items > AvMAX(av) + 1) {
1679 if (AvARRAY(av) != ary) {
1680 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1681 SvPVX(av) = (char*)ary;
1683 if (items > AvMAX(av) + 1) {
1684 AvMAX(av) = items - 1;
1685 Renew(ary,items,SV*);
1687 SvPVX(av) = (char*)ary;
1690 Copy(MARK,AvARRAY(av),items,SV*);
1691 AvFILL(av) = items - 1;
1699 RETURNOP(CvSTART(cv));
1707 I32 elem = POPi - curcop->cop_arybase;
1709 I32 lval = op->op_flags & OPf_MOD;
1711 if (SvTYPE(av) != SVt_PVAV)
1713 svp = av_fetch(av, elem, lval);
1715 if (!svp || *svp == &sv_undef)
1716 DIE(no_aelem, elem);
1717 if (op->op_private & OPpLVAL_INTRO)
1719 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1724 (void)SvUPGRADE(sv, SVt_RV);
1725 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1726 (SV*)newHV() : (SV*)newAV());
1732 PUSHs(svp ? *svp : &sv_undef);
1745 sv = *(stack_base + TOPMARK + 1);
1755 !(packname = SvPV(sv, na)) ||
1756 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1757 !(ob=(SV*)GvIO(iogv)))
1759 char *name = SvPV(nm, na);
1761 if (!packname || !isALPHA(*packname))
1762 DIE("Can't call method \"%s\" without a package or object reference", name);
1763 if (!(stash = gv_stashpv(packname, FALSE))) {
1764 if (gv_stashpv("UNIVERSAL", FALSE))
1765 stash = gv_stashpv(packname, TRUE);
1767 DIE("Can't call method \"%s\" in empty package \"%s\"",
1770 gv = gv_fetchmethod(stash,name);
1772 DIE("Can't locate object method \"%s\" via package \"%s\"",
1779 if (!ob || !SvOBJECT(ob)) {
1780 char *name = SvPV(nm, na);
1781 DIE("Can't call method \"%s\" on unblessed reference", name);
1784 if (!gv) { /* nothing cached */
1785 char *name = SvPV(nm, na);
1786 gv = gv_fetchmethod(SvSTASH(ob),name);
1788 DIE("Can't locate object method \"%s\" via package \"%s\"",
1789 name, HvNAME(SvSTASH(ob)));