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);
95 if (op->op_private & OPpASSIGN_BACKWARDS) {
97 temp = left; left = right; right = temp;
99 if (tainting && tainted && (!SvGMAGICAL(left) || !SvSMAGICAL(left) ||
100 !((mg = mg_find(left, 't')) && mg->mg_len & 1)))
104 SvSetSV(right, left);
114 RETURNOP(cCONDOP->op_true);
116 RETURNOP(cCONDOP->op_false);
122 TAINT_NOT; /* Each statement is presumed innocent */
123 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
125 oldsave = scopestack[scopestack_ix - 1];
126 LEAVE_SCOPE(oldsave);
132 dSP; tryAMAGICbinSET(seq,0);
135 SETs( sv_eq(left, right) ? &sv_yes : &sv_no );
142 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
147 if (SvGMAGICAL(left))
151 sv_setpvn(TARG,s,len);
153 else if (!SvOK(TARG))
154 sv_setpv(TARG, ""); /* Suppress warning. */
156 sv_catpvn(TARG,s,len);
166 if (op->op_private & OPpLVAL_INTRO)
167 SAVECLEARSV(curpad[op->op_targ]);
173 last_in_gv = (GV*)(*stack_sp--);
174 return do_readline();
179 dSP; tryAMAGICbinSET(eq,0);
182 SETs((TOPn == value) ? &sv_yes : &sv_no);
192 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
207 RETURNOP(cLOGOP->op_other);
213 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
216 SETn( left + right );
224 AV *av = GvAV((GV*)cSVOP->op_sv);
225 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
226 PUSHs(svp ? *svp : &sv_undef);
234 do_join(TARG, *MARK, MARK, SP);
247 /* Oversized hot code. */
251 dSP; dMARK; dORIGMARK;
256 if (op->op_flags & OPf_STACKED)
260 if (!(io = GvIO(gv))) {
262 SV* sv = sv_newmortal();
264 warn("Filehandle %s never opened", SvPV(sv,na));
267 SETERRNO(EBADF,RMS$_IFI);
270 else if (!(fp = IoOFP(io))) {
272 SV* sv = sv_newmortal();
275 warn("Filehandle %s opened only for input", SvPV(sv,na));
277 warn("print on closed filehandle %s", SvPV(sv,na));
279 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
286 if (!do_print(*MARK, fp))
290 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
299 if (!do_print(*MARK, fp))
308 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
311 if (IoFLAGS(io) & IOf_FLUSH)
312 if (fflush(fp) == EOF)
335 if (SvTYPE(av) != SVt_PVAV)
336 DIE("Not an ARRAY reference");
337 if (op->op_private & OPpLVAL_INTRO)
338 av = (AV*)save_svref((SV**)sv);
339 if (op->op_flags & OPf_REF) {
345 if (SvTYPE(sv) == SVt_PVAV) {
347 if (op->op_flags & OPf_REF) {
353 if (SvTYPE(sv) != SVt_PVGV) {
356 if (SvGMAGICAL(sv)) {
362 if (op->op_flags & OPf_REF ||
363 op->op_private & HINT_STRICT_REFS)
364 DIE(no_usym, "an ARRAY");
368 if (op->op_private & HINT_STRICT_REFS)
369 DIE(no_symref, sym, "an ARRAY");
370 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
373 if (op->op_private & OPpLVAL_INTRO)
375 if (op->op_flags & OPf_REF) {
382 if (GIMME == G_ARRAY) {
383 I32 maxarg = AvFILL(av) + 1;
385 Copy(AvARRAY(av), SP+1, maxarg, SV*);
390 I32 maxarg = AvFILL(av) + 1;
406 if (SvTYPE(hv) != SVt_PVHV)
407 DIE("Not a HASH reference");
408 if (op->op_private & OPpLVAL_INTRO)
409 hv = (HV*)save_svref((SV**)sv);
410 if (op->op_flags & OPf_REF) {
416 if (SvTYPE(sv) == SVt_PVHV) {
418 if (op->op_flags & OPf_REF) {
424 if (SvTYPE(sv) != SVt_PVGV) {
427 if (SvGMAGICAL(sv)) {
433 if (op->op_flags & OPf_REF ||
434 op->op_private & HINT_STRICT_REFS)
435 DIE(no_usym, "a HASH");
439 if (op->op_private & HINT_STRICT_REFS)
440 DIE(no_symref, sym, "a HASH");
441 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
444 if (op->op_private & OPpLVAL_INTRO)
446 if (op->op_flags & OPf_REF) {
453 if (GIMME == G_ARRAY) { /* array wanted */
460 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
473 SV **lastlelem = stack_sp;
474 SV **lastrelem = stack_base + POPMARK;
475 SV **firstrelem = stack_base + POPMARK + 1;
476 SV **firstlelem = lastrelem + 1;
488 delaymagic = DM_DELAY; /* catch simultaneous items */
490 /* If there's a common identifier on both sides we have to take
491 * special care that assigning the identifier on the left doesn't
492 * clobber a value on the right that's used later in the list.
494 if (op->op_private & OPpASSIGN_COMMON) {
495 for (relem = firstrelem; relem <= lastrelem; relem++) {
498 *relem = sv_mortalcopy(sv);
506 while (lelem <= lastlelem) {
508 switch (SvTYPE(sv)) {
511 magic = SvMAGICAL(ary) != 0;
515 while (relem <= lastrelem) { /* gobble up all the rest */
520 (void)av_store(ary,i++,sv);
532 magic = SvMAGICAL(hash) != 0;
535 while (relem < lastrelem) { /* gobble up all the rest */
539 if (dowarn && SvROK(sv)) /* Tom's gripe */
540 warn("Attempt to use reference as hash key");
543 sv = &sv_no, relem++;
544 tmps = SvPV(sv, len);
545 tmpstr = NEWSV(29,0);
547 sv_setsv(tmpstr,*relem); /* value */
549 (void)hv_store(hash,tmps,len,tmpstr,0);
553 if (relem == lastrelem) {
554 warn("Odd number of elements in hash list");
558 if (dowarn && SvROK(sv)) /* Tom's gripe */
559 warn("Attempt to use reference as hash key");
560 tmps = SvPV(sv, len);
561 tmpstr = NEWSV(29,0);
562 (void) hv_store(hash, tmps, len, tmpstr, 0);
566 relem++; /* allow for (%a,%b) = 1; */
568 if (!HvARRAY(hash) && !magic) {
569 Newz(42, hash->sv_any->xhv_array,
570 sizeof(HE*) * (HvMAX(hash)+1), char);
575 if (SvTHINKFIRST(sv)) {
576 if (SvREADONLY(sv) && curcop != &compiling) {
577 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
579 if (relem <= lastrelem)
586 if (relem <= lastrelem) {
587 sv_setsv(sv, *relem);
591 sv_setsv(sv, &sv_undef);
596 if (delaymagic & ~DM_DELAY) {
597 if (delaymagic & DM_UID) {
599 (void)setresuid(uid,euid,(Uid_t)-1);
602 (void)setreuid(uid,euid);
605 if ((delaymagic & DM_UID) == DM_RUID) {
607 delaymagic &= ~DM_RUID;
609 # endif /* HAS_SETRUID */
611 if ((delaymagic & DM_UID) == DM_EUID) {
613 delaymagic &= ~DM_EUID;
615 # endif /* HAS_SETEUID */
616 if (delaymagic & DM_UID) {
618 DIE("No setreuid available");
621 # endif /* HAS_SETREUID */
622 #endif /* HAS_SETRESUID */
624 euid = (int)geteuid();
626 if (delaymagic & DM_GID) {
628 (void)setresgid(gid,egid,(Gid_t)-1);
631 (void)setregid(gid,egid);
634 if ((delaymagic & DM_GID) == DM_RGID) {
636 delaymagic &= ~DM_RGID;
638 # endif /* HAS_SETRGID */
640 if ((delaymagic & DM_GID) == DM_EGID) {
642 delaymagic &= ~DM_EGID;
644 # endif /* HAS_SETEGID */
645 if (delaymagic & DM_GID) {
647 DIE("No setregid available");
650 # endif /* HAS_SETREGID */
651 #endif /* HAS_SETRESGID */
653 egid = (int)getegid();
655 tainting |= (euid != uid || egid != gid);
658 if (GIMME == G_ARRAY) {
662 SP = firstrelem + (lastlelem - firstlelem);
667 for (relem = firstrelem; relem <= lastrelem; ++relem) {
671 SETi(lastrelem - firstrelem + 1);
682 register PMOP *pm = cPMOP;
689 register REGEXP *rx = pm->op_pmregexp;
694 if (op->op_flags & OPf_STACKED)
703 DIE("panic: do_match");
705 if (pm->op_pmflags & PMf_USED) {
706 if (gimme == G_ARRAY)
711 if (!rx->prelen && curpm) {
713 rx = pm->op_pmregexp;
716 if (global = pm->op_pmflags & PMf_GLOBAL) {
718 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
719 MAGIC* mg = mg_find(TARG, 'g');
720 if (mg && mg->mg_len >= 0) {
721 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
722 minmatch = (mg->mg_flags & MGf_MINMATCH);
726 if (!rx->nparens && !global)
727 gimme = G_SCALAR; /* accidental array context? */
728 safebase = (gimme == G_ARRAY) || global;
729 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
731 multiline = pm->op_pmflags & PMf_MULTILINE;
735 if (global && rx->startp[0]) {
739 minmatch = (s == rx->startp[0]);
741 if (pm->op_pmshort) {
742 if (pm->op_pmflags & PMf_SCANFIRST) {
743 if (SvSCREAM(TARG)) {
744 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
746 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
748 else if (pm->op_pmflags & PMf_ALL)
751 else if (!(s = fbm_instr((unsigned char*)s,
752 (unsigned char*)strend, pm->op_pmshort)))
754 else if (pm->op_pmflags & PMf_ALL)
756 if (s && rx->regback >= 0) {
757 ++BmUSEFUL(pm->op_pmshort);
765 else if (!multiline) {
766 if (*SvPVX(pm->op_pmshort) != *s ||
767 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
768 if (pm->op_pmflags & PMf_FOLD) {
769 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
776 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
777 SvREFCNT_dec(pm->op_pmshort);
778 pm->op_pmshort = Nullsv; /* opt is being useless */
781 if (pregexec(rx, s, strend, truebase, minmatch,
782 SvSCREAM(TARG) ? TARG : Nullsv,
785 if (pm->op_pmflags & PMf_ONCE)
786 pm->op_pmflags |= PMf_USED;
794 if (gimme == G_ARRAY) {
798 if (global && !iters)
802 EXTEND(SP, iters + i);
803 for (i = !i; i <= iters; i++) {
804 PUSHs(sv_newmortal());
806 if ((s = rx->startp[i]) && rx->endp[i] ) {
807 len = rx->endp[i] - s;
808 sv_setpvn(*SP, s, len);
812 truebase = rx->subbeg;
813 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
822 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
823 mg = mg_find(TARG, 'g');
825 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
826 mg = mg_find(TARG, 'g');
829 mg->mg_len = rx->endp[0] - truebase;
830 if (rx->startp[0] == rx->endp[0])
831 mg->mg_flags |= MGf_MINMATCH;
833 mg->mg_flags &= ~MGf_MINMATCH;
842 ++BmUSEFUL(pm->op_pmshort);
844 if (pm->op_pmflags & PMf_ONCE)
845 pm->op_pmflags |= PMf_USED;
847 rx->subbeg = truebase;
850 rx->endp[0] = s + SvCUR(pm->op_pmshort);
857 Safefree(rx->subbase);
858 tmps = rx->subbase = savepvn(t, strend-t);
860 rx->subend = tmps + (strend-t);
861 tmps = rx->startp[0] = tmps + (s - t);
862 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
868 ++BmUSEFUL(pm->op_pmshort);
872 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
873 MAGIC* mg = mg_find(TARG, 'g');
878 if (gimme == G_ARRAY)
891 register IO *io = GvIO(last_in_gv);
892 register I32 type = op->op_type;
898 if (IoFLAGS(io) & IOf_ARGV) {
899 if (IoFLAGS(io) & IOf_START) {
900 IoFLAGS(io) &= ~IOf_START;
902 if (av_len(GvAVn(last_in_gv)) < 0) {
903 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
904 av_push(GvAVn(last_in_gv), tmpstr);
907 fp = nextargv(last_in_gv);
908 if (!fp) { /* Note: fp != IoIFP(io) */
909 (void)do_close(last_in_gv, FALSE); /* now it does*/
910 IoFLAGS(io) |= IOf_START;
913 else if (type == OP_GLOB) {
914 SV *tmpcmd = NEWSV(55, 0);
918 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
919 /* since spawning off a process is a real performance hit */
922 #include <lib$routines.h>
925 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
926 char vmsspec[NAM$C_MAXRSS+1];
927 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
928 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
929 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
932 struct dsc$descriptor_s wilddsc
933 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
934 struct dsc$descriptor_vs rsdsc
935 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
936 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
938 /* We could find out if there's an explicit dev/dir or version
939 by peeking into lib$find_file's internal context at
940 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
941 but that's unsupported, so I don't want to do it now and
942 have it bite someone in the future. */
943 strcat(tmpfnam,tmpnam(NULL));
944 cp = SvPV(tmpglob,i);
946 if (cp[i] == ';') hasver = 1;
955 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
960 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
961 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
962 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
963 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
964 &dfltdsc,NULL,NULL,NULL))&1)) {
965 end = rstr + (unsigned long int) *rslt;
966 if (!hasver) while (*end != ';') end--;
967 *(end++) = '\n'; *end = '\0';
968 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
970 if (isunix) trim_unixpath(SvPVX(tmpglob),rstr);
975 while (*(--begin) != ']' && *begin != '>') ;
978 ok = (fputs(begin,tmpfp) != EOF);
980 if (cxt) (void)lib$find_file_end(&cxt);
981 if (ok && sts != RMS$_NMF &&
982 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
989 IoIFP(io) = fp = tmpfp;
995 sv_setpv(tmpcmd, "perlglob ");
996 sv_catsv(tmpcmd, tmpglob);
997 sv_catpv(tmpcmd, " |");
1000 sv_setpvn(tmpcmd, cshname, cshlen);
1001 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1002 sv_catsv(tmpcmd, tmpglob);
1003 sv_catpv(tmpcmd, "' 2>/dev/null |");
1005 sv_setpv(tmpcmd, "echo ");
1006 sv_catsv(tmpcmd, tmpglob);
1008 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1010 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1014 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),Nullfp);
1020 else if (type == OP_GLOB)
1024 if (dowarn && !(IoFLAGS(io) & IOf_START))
1025 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1026 if (GIMME == G_SCALAR) {
1027 (void)SvOK_off(TARG);
1032 if (GIMME == G_ARRAY) {
1033 sv = sv_2mortal(NEWSV(57, 80));
1038 (void)SvUPGRADE(sv, SVt_PV);
1039 tmplen = SvLEN(sv); /* remember if already alloced */
1041 Sv_Grow(sv, 80); /* try short-buffering it */
1042 if (type == OP_RCATLINE)
1048 if (!sv_gets(sv, fp, offset)) {
1050 if (IoFLAGS(io) & IOf_ARGV) {
1051 fp = nextargv(last_in_gv);
1054 (void)do_close(last_in_gv, FALSE);
1055 IoFLAGS(io) |= IOf_START;
1057 else if (type == OP_GLOB) {
1058 (void)do_close(last_in_gv, FALSE);
1060 if (GIMME == G_SCALAR) {
1061 (void)SvOK_off(TARG);
1070 SvTAINT(sv); /* Anything from the outside world...*/
1072 if (type == OP_GLOB) {
1077 if (*SvEND(sv) == rschar)
1081 for (tmps = SvPVX(sv); *tmps; tmps++)
1082 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1083 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1085 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1086 (void)POPs; /* Unmatched wildcard? Chuck it... */
1090 if (GIMME == G_ARRAY) {
1091 if (SvLEN(sv) - SvCUR(sv) > 20) {
1092 SvLEN_set(sv, SvCUR(sv)+1);
1093 Renew(SvPVX(sv), SvLEN(sv), char);
1095 sv = sv_2mortal(NEWSV(58, 80));
1098 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1099 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1103 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1104 Renew(SvPVX(sv), SvLEN(sv), char);
1113 register CONTEXT *cx;
1117 * We don't just use the GIMME macro here because it assumes there's
1118 * already a context, which ain't necessarily so at initial startup.
1121 if (op->op_flags & OPf_KNOW)
1122 gimme = op->op_flags & OPf_LIST;
1123 else if (cxstack_ix >= 0)
1124 gimme = cxstack[cxstack_ix].blk_gimme;
1131 PUSHBLOCK(cx, CXt_BLOCK, sp);
1142 char *key = SvPV(keysv, keylen);
1144 I32 lval = op->op_flags & OPf_MOD;
1146 if (SvTYPE(hv) != SVt_PVHV)
1148 svp = hv_fetch(hv, key, keylen, lval);
1150 if (!svp || *svp == &sv_undef)
1152 if (op->op_private & OPpLVAL_INTRO)
1154 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1159 (void)SvUPGRADE(sv, SVt_RV);
1160 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1161 (SV*)newHV() : (SV*)newAV());
1167 PUSHs(svp ? *svp : &sv_undef);
1174 register CONTEXT *cx;
1180 if (op->op_flags & OPf_SPECIAL) {
1181 cx = &cxstack[cxstack_ix];
1182 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1187 if (op->op_flags & OPf_KNOW)
1188 gimme = op->op_flags & OPf_LIST;
1189 else if (cxstack_ix >= 0)
1190 gimme = cxstack[cxstack_ix].blk_gimme;
1194 if (gimme == G_SCALAR) {
1195 if (op->op_private & OPpLEAVE_VOID)
1200 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1203 *MARK = sv_mortalcopy(TOPs);
1212 for (mark = newsp + 1; mark <= SP; mark++)
1213 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1214 *mark = sv_mortalcopy(*mark);
1215 /* in case LEAVE wipes old return values */
1217 curpm = newpm; /* Don't pop $1 et al till now */
1227 register CONTEXT *cx;
1231 cx = &cxstack[cxstack_ix];
1232 if (cx->cx_type != CXt_LOOP)
1233 DIE("panic: pp_iter");
1235 if (cx->blk_loop.iterix >= cx->blk_oldsp)
1238 if (sv = AvARRAY(cx->blk_loop.iterary)[++cx->blk_loop.iterix]) {
1240 *cx->blk_loop.itervar = sv;
1243 *cx->blk_loop.itervar = &sv_undef;
1251 register PMOP *pm = cPMOP;
1266 register REGEXP *rx = pm->op_pmregexp;
1268 int force_on_match = 0;
1270 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1272 if (op->op_flags & OPf_STACKED)
1278 s = SvPV(TARG, len);
1279 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1284 DIE("panic: do_subst");
1287 maxiters = (strend - s) + 10;
1289 if (!rx->prelen && curpm) {
1291 rx = pm->op_pmregexp;
1293 safebase = ((!rx || !rx->nparens) && !sawampersand);
1294 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1296 multiline = pm->op_pmflags & PMf_MULTILINE;
1299 if (pm->op_pmshort) {
1300 if (pm->op_pmflags & PMf_SCANFIRST) {
1301 if (SvSCREAM(TARG)) {
1302 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1304 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1307 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1310 if (s && rx->regback >= 0) {
1311 ++BmUSEFUL(pm->op_pmshort);
1319 else if (!multiline) {
1320 if (*SvPVX(pm->op_pmshort) != *s ||
1321 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1322 if (pm->op_pmflags & PMf_FOLD) {
1323 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1330 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1331 SvREFCNT_dec(pm->op_pmshort);
1332 pm->op_pmshort = Nullsv; /* opt is being useless */
1335 once = !(rpm->op_pmflags & PMf_GLOBAL);
1336 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1337 c = SvPV(dstr, clen);
1338 if (clen <= rx->minlen) {
1339 /* can do inplace substitution */
1340 if (pregexec(rx, s, strend, orig, 0,
1341 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1342 if (force_on_match) {
1344 s = SvPV_force(TARG, len);
1347 if (rx->subbase) /* oops, no we can't */
1351 SvSCREAM_off(TARG); /* disable possible screamer */
1356 if (m - s > strend - d) { /* faster to shorten from end */
1358 Copy(c, m, clen, char);
1363 Move(d, m, i, char);
1367 SvCUR_set(TARG, m - s);
1368 (void)SvPOK_only(TARG);
1374 else if (i = m - s) { /* faster from front */
1382 Copy(c, m, clen, char);
1383 (void)SvPOK_only(TARG);
1391 Copy(c, d, clen, char);
1392 (void)SvPOK_only(TARG);
1399 (void)SvPOK_only(TARG);
1407 if (iters++ > maxiters)
1408 DIE("Substitution loop");
1413 Move(s, d, i, char);
1417 Copy(c, d, clen, char);
1421 } while (pregexec(rx, s, strend, orig, s == m,
1422 Nullsv, TRUE)); /* (don't match same null twice) */
1425 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1426 Move(s, d, i+1, char); /* include the Null */
1428 (void)SvPOK_only(TARG);
1430 PUSHs(sv_2mortal(newSViv((I32)iters)));
1439 if (pregexec(rx, s, strend, orig, 0,
1440 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1442 if (force_on_match) {
1444 s = SvPV_force(TARG, len);
1447 dstr = NEWSV(25, sv_len(TARG));
1448 sv_setpvn(dstr, m, s-m);
1451 register CONTEXT *cx;
1453 RETURNOP(cPMOP->op_pmreplroot);
1456 if (iters++ > maxiters)
1457 DIE("Substitution loop");
1458 if (rx->subbase && rx->subbase != orig) {
1463 strend = s + (strend - m);
1466 sv_catpvn(dstr, s, m-s);
1469 sv_catpvn(dstr, c, clen);
1472 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1474 sv_catpvn(dstr, s, strend - s);
1477 Safefree(SvPVX(TARG));
1478 SvPVX(TARG) = SvPVX(dstr);
1479 SvCUR_set(TARG, SvCUR(dstr));
1480 SvLEN_set(TARG, SvLEN(dstr));
1484 (void)SvPOK_only(TARG);
1486 PUSHs(sv_2mortal(newSViv((I32)iters)));
1493 ++BmUSEFUL(pm->op_pmshort);
1503 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1505 LEAVE; /* exit inner scope */
1508 if (stack_base + *markstack_ptr > sp) {
1511 LEAVE; /* exit outer scope */
1512 (void)POPMARK; /* pop src */
1513 items = --*markstack_ptr - markstack_ptr[-1];
1514 (void)POPMARK; /* pop dst */
1515 SP = stack_base + POPMARK; /* pop original mark */
1516 if (GIMME != G_ARRAY) {
1527 ENTER; /* enter inner scope */
1530 src = stack_base[*markstack_ptr];
1534 RETURNOP(cLOGOP->op_other);
1545 register CONTEXT *cx;
1550 if (gimme == G_SCALAR) {
1553 if (SvFLAGS(TOPs) & SVs_TEMP)
1556 *MARK = sv_mortalcopy(TOPs);
1564 for (mark = newsp + 1; mark <= SP; mark++)
1565 if (!(SvFLAGS(*mark) & SVs_TEMP))
1566 *mark = sv_mortalcopy(*mark);
1567 /* in case LEAVE wipes old return values */
1570 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1571 AV* av = cx->blk_sub.argarray;
1576 curpm = newpm; /* Don't pop $1 et al till now */
1580 return pop_return();
1589 register CONTEXT *cx;
1593 DIE("Not a CODE reference");
1594 switch (SvTYPE(sv)) {
1599 if (sv == &sv_yes) /* unfound import, ignore */
1602 DIE(no_usym, "a subroutine");
1604 if (op->op_private & HINT_STRICT_REFS)
1605 DIE(no_symref, sym, "a subroutine");
1606 cv = perl_get_cv(sym, TRUE);
1610 if (SvTYPE(cv) == SVt_PVCV)
1615 DIE("Not a CODE reference");
1620 if (!(cv = GvCV((GV*)sv)))
1621 cv = sv_2cv(sv, &stash, &gv, TRUE);
1630 DIE("Not a CODE reference");
1632 if (!CvROOT(cv) && !CvXSUB(cv)) {
1633 if (gv = CvGV(cv)) {
1634 SV *tmpstr = sv_newmortal();
1636 gv_efullname(tmpstr, gv);
1637 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1638 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1640 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1644 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1646 DIE("Undefined subroutine called");
1649 if ((op->op_private & OPpDEREF_DB) && !CvXSUB(cv)) {
1652 if (SvFLAGS(cv) & (SVpcv_ANON | SVpcv_CLONED)) /* Is GV potentially non-unique? */
1653 sv_setsv(sv, newRV((SV*)cv));
1656 gv_efullname(sv,gv);
1660 DIE("No DBsub routine");
1666 if (CvOLDSTYLE(cv)) {
1667 I32 (*fp3)_((int,int,int));
1669 register I32 items = SP - MARK;
1674 stack_sp = mark + 1;
1675 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1676 items = (*fp3)(CvXSUBANY(cv).any_i32,
1677 MARK - stack_base + 1,
1679 stack_sp = stack_base + items;
1682 I32 markix = TOPMARK;
1685 (void)(*CvXSUB(cv))(cv);
1687 /* Enforce some sanity in scalar context. */
1688 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1689 if (markix > stack_sp - stack_base)
1690 *(stack_base + markix) = &sv_undef;
1692 *(stack_base + markix) = *stack_sp;
1693 stack_sp = stack_base + markix;
1701 register I32 items = SP - MARK;
1702 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1703 AV* padlist = CvPADLIST(cv);
1704 SV** svp = AvARRAY(padlist);
1705 push_return(op->op_next);
1706 PUSHBLOCK(cx, CXt_SUB, MARK);
1709 if (CvDEPTH(cv) < 2)
1710 (void)SvREFCNT_inc(cv);
1711 else { /* save temporaries on recursion? */
1712 if (CvDEPTH(cv) == 100 && dowarn)
1713 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1714 if (CvDEPTH(cv) > AvFILL(padlist)) {
1716 AV *newpad = newAV();
1717 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1718 I32 ix = AvFILL((AV*)svp[1]);
1719 svp = AvARRAY(svp[0]);
1720 for ( ;ix > 0; ix--) {
1721 if (svp[ix] != &sv_undef) {
1722 char *name = SvPVX(svp[ix]);
1723 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1724 av_store(newpad, ix,
1725 SvREFCNT_inc(oldpad[ix]) );
1727 else { /* our own lexical */
1729 av_store(newpad, ix, sv = (SV*)newAV());
1730 else if (*name == '%')
1731 av_store(newpad, ix, sv = (SV*)newHV());
1733 av_store(newpad, ix, sv = NEWSV(0,0));
1738 av_store(newpad, ix, sv = NEWSV(0,0));
1742 av = newAV(); /* will be @_ */
1744 av_store(newpad, 0, (SV*)av);
1745 AvFLAGS(av) = AVf_REIFY;
1746 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1747 AvFILL(padlist) = CvDEPTH(cv);
1748 svp = AvARRAY(padlist);
1752 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1754 AV* av = (AV*)curpad[0];
1761 cx->blk_sub.savearray = GvAV(defgv);
1762 cx->blk_sub.argarray = av;
1763 GvAV(defgv) = cx->blk_sub.argarray;
1766 if (items > AvMAX(av) + 1) {
1768 if (AvARRAY(av) != ary) {
1769 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1770 SvPVX(av) = (char*)ary;
1772 if (items > AvMAX(av) + 1) {
1773 AvMAX(av) = items - 1;
1774 Renew(ary,items,SV*);
1776 SvPVX(av) = (char*)ary;
1779 Copy(MARK,AvARRAY(av),items,SV*);
1780 AvFILL(av) = items - 1;
1788 RETURNOP(CvSTART(cv));
1798 I32 lval = op->op_flags & OPf_MOD;
1801 elem -= curcop->cop_arybase;
1802 if (SvTYPE(av) != SVt_PVAV)
1804 svp = av_fetch(av, elem, lval);
1806 if (!svp || *svp == &sv_undef)
1807 DIE(no_aelem, elem);
1808 if (op->op_private & OPpLVAL_INTRO)
1810 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1815 (void)SvUPGRADE(sv, SVt_RV);
1816 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1817 (SV*)newHV() : (SV*)newAV());
1823 PUSHs(svp ? *svp : &sv_undef);
1836 sv = *(stack_base + TOPMARK + 1);
1848 !(packname = SvPV(sv, na)) ||
1849 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1850 !(ob=(SV*)GvIO(iogv)))
1852 char *name = SvPV(nm, na);
1854 if (!packname || !isALPHA(*packname))
1855 DIE("Can't call method \"%s\" without a package or object reference", name);
1856 if (!(stash = gv_stashpv(packname, FALSE))) {
1857 if (gv_stashpv("UNIVERSAL", FALSE))
1858 stash = gv_stashpv(packname, TRUE);
1860 DIE("Can't call method \"%s\" in empty package \"%s\"",
1863 gv = gv_fetchmethod(stash,name);
1865 DIE("Can't locate object method \"%s\" via package \"%s\"",
1870 *(stack_base + TOPMARK + 1) = iogv;
1873 if (!ob || !SvOBJECT(ob)) {
1874 char *name = SvPV(nm, na);
1875 DIE("Can't call method \"%s\" on unblessed reference", name);
1878 if (!gv) { /* nothing cached */
1879 char *name = SvPV(nm, na);
1880 gv = gv_fetchmethod(SvSTASH(ob),name);
1882 DIE("Can't locate object method \"%s\" via package \"%s\"",
1883 name, HvNAME(SvSTASH(ob)));