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);
92 switch (elem ? *elem : '\0')
95 if (strEQ(elem, "ARRAY"))
99 if (strEQ(elem, "CODE"))
103 if (strEQ(elem, "FILEHANDLE"))
104 ref = (SV*)GvIOp(gv);
107 if (strEQ(elem, "GLOB"))
111 if (strEQ(elem, "HASH"))
115 if (strEQ(elem, "NAME"))
116 sv = newSVpv(GvNAME(gv), GvNAMELEN(gv));
119 if (strEQ(elem, "PACKAGE"))
120 sv = newSVpv(HvNAME(GvSTASH(gv)), 0);
123 if (strEQ(elem, "SCALAR"))
144 RETURNOP(cLOGOP->op_other);
153 if (op->op_private & OPpASSIGN_BACKWARDS) {
155 temp = left; left = right; right = temp;
157 if (tainting && tainted && (!SvGMAGICAL(left) || !SvSMAGICAL(left) ||
158 !((mg = mg_find(left, 't')) && mg->mg_len & 1)))
162 SvSetSV(right, left);
172 RETURNOP(cCONDOP->op_true);
174 RETURNOP(cCONDOP->op_false);
180 TAINT_NOT; /* Each statement is presumed innocent */
181 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
183 oldsave = scopestack[scopestack_ix - 1];
184 LEAVE_SCOPE(oldsave);
190 dSP; tryAMAGICbinSET(seq,0);
193 SETs( sv_eq(left, right) ? &sv_yes : &sv_no );
200 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
207 sv_setpvn(TARG,s,len);
209 else if (SvGMAGICAL(TARG))
211 else if (!SvOK(TARG)) {
212 s = SvPV_force(TARG, len);
213 sv_setpv(TARG, ""); /* Suppress warning. */
216 sv_catpvn(TARG,s,len);
226 if (op->op_flags & OPf_MOD) {
227 if (op->op_private & OPpLVAL_INTRO)
228 SAVECLEARSV(curpad[op->op_targ]);
229 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
230 provide_ref(op, curpad[op->op_targ]);
237 last_in_gv = (GV*)(*stack_sp--);
238 return do_readline();
243 dSP; tryAMAGICbinSET(eq,0);
246 SETs((TOPn == value) ? &sv_yes : &sv_no);
256 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
271 RETURNOP(cLOGOP->op_other);
277 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
280 SETn( left + right );
288 AV *av = GvAV((GV*)cSVOP->op_sv);
289 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
290 PUSHs(svp ? *svp : &sv_undef);
298 do_join(TARG, *MARK, MARK, SP);
311 /* Oversized hot code. */
315 dSP; dMARK; dORIGMARK;
320 if (op->op_flags & OPf_STACKED)
324 if (!(io = GvIO(gv))) {
326 SV* sv = sv_newmortal();
328 warn("Filehandle %s never opened", SvPV(sv,na));
331 SETERRNO(EBADF,RMS$_IFI);
334 else if (!(fp = IoOFP(io))) {
336 SV* sv = sv_newmortal();
339 warn("Filehandle %s opened only for input", SvPV(sv,na));
341 warn("print on closed filehandle %s", SvPV(sv,na));
343 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
350 if (!do_print(*MARK, fp))
354 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
363 if (!do_print(*MARK, fp))
372 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
375 if (IoFLAGS(io) & IOf_FLUSH)
376 if (Fflush(fp) == EOF)
399 if (SvTYPE(av) != SVt_PVAV)
400 DIE("Not an ARRAY reference");
401 if (op->op_private & OPpLVAL_INTRO)
402 av = (AV*)save_svref((SV**)sv);
403 if (op->op_flags & OPf_REF) {
409 if (SvTYPE(sv) == SVt_PVAV) {
411 if (op->op_flags & OPf_REF) {
419 if (SvTYPE(sv) != SVt_PVGV) {
422 if (SvGMAGICAL(sv)) {
428 if (op->op_flags & OPf_REF ||
429 op->op_private & HINT_STRICT_REFS)
430 DIE(no_usym, "an ARRAY");
431 if (GIMME == G_ARRAY)
436 if (op->op_private & HINT_STRICT_REFS)
437 DIE(no_symref, sym, "an ARRAY");
438 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
443 if (op->op_private & OPpLVAL_INTRO)
445 if (op->op_flags & OPf_REF) {
452 if (GIMME == G_ARRAY) {
453 I32 maxarg = AvFILL(av) + 1;
455 Copy(AvARRAY(av), SP+1, maxarg, SV*);
460 I32 maxarg = AvFILL(av) + 1;
476 if (SvTYPE(hv) != SVt_PVHV)
477 DIE("Not a HASH reference");
478 if (op->op_private & OPpLVAL_INTRO)
479 hv = (HV*)save_svref((SV**)sv);
480 if (op->op_flags & OPf_REF) {
486 if (SvTYPE(sv) == SVt_PVHV) {
488 if (op->op_flags & OPf_REF) {
496 if (SvTYPE(sv) != SVt_PVGV) {
499 if (SvGMAGICAL(sv)) {
505 if (op->op_flags & OPf_REF ||
506 op->op_private & HINT_STRICT_REFS)
507 DIE(no_usym, "a HASH");
508 if (GIMME == G_ARRAY) {
515 if (op->op_private & HINT_STRICT_REFS)
516 DIE(no_symref, sym, "a HASH");
517 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
522 if (op->op_private & OPpLVAL_INTRO)
524 if (op->op_flags & OPf_REF) {
531 if (GIMME == G_ARRAY) { /* array wanted */
538 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
551 SV **lastlelem = stack_sp;
552 SV **lastrelem = stack_base + POPMARK;
553 SV **firstrelem = stack_base + POPMARK + 1;
554 SV **firstlelem = lastrelem + 1;
566 delaymagic = DM_DELAY; /* catch simultaneous items */
568 /* If there's a common identifier on both sides we have to take
569 * special care that assigning the identifier on the left doesn't
570 * clobber a value on the right that's used later in the list.
572 if (op->op_private & OPpASSIGN_COMMON) {
573 for (relem = firstrelem; relem <= lastrelem; relem++) {
576 *relem = sv_mortalcopy(sv);
584 while (lelem <= lastlelem) {
585 tainted = 0; /* Each item stands on its own, taintwise. */
587 switch (SvTYPE(sv)) {
590 magic = SvMAGICAL(ary) != 0;
594 while (relem <= lastrelem) { /* gobble up all the rest */
599 (void)av_store(ary,i++,sv);
610 magic = SvMAGICAL(hash) != 0;
613 while (relem < lastrelem) { /* gobble up all the rest */
618 sv = &sv_no, relem++;
619 tmps = SvPV(sv, len);
620 tmpstr = NEWSV(29,0);
622 sv_setsv(tmpstr,*relem); /* value */
624 (void)hv_store(hash,tmps,len,tmpstr,0);
632 if (SvTHINKFIRST(sv)) {
633 if (SvREADONLY(sv) && curcop != &compiling) {
634 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
636 if (relem <= lastrelem)
643 if (relem <= lastrelem) {
644 sv_setsv(sv, *relem);
648 sv_setsv(sv, &sv_undef);
653 if (delaymagic & ~DM_DELAY) {
654 if (delaymagic & DM_UID) {
656 (void)setresuid(uid,euid,(Uid_t)-1);
659 (void)setreuid(uid,euid);
662 if ((delaymagic & DM_UID) == DM_RUID) {
664 delaymagic &= ~DM_RUID;
666 # endif /* HAS_SETRUID */
668 if ((delaymagic & DM_UID) == DM_EUID) {
670 delaymagic &= ~DM_EUID;
672 # endif /* HAS_SETEUID */
673 if (delaymagic & DM_UID) {
675 DIE("No setreuid available");
678 # endif /* HAS_SETREUID */
679 #endif /* HAS_SETRESUID */
681 euid = (int)geteuid();
683 if (delaymagic & DM_GID) {
685 (void)setresgid(gid,egid,(Gid_t)-1);
688 (void)setregid(gid,egid);
691 if ((delaymagic & DM_GID) == DM_RGID) {
693 delaymagic &= ~DM_RGID;
695 # endif /* HAS_SETRGID */
697 if ((delaymagic & DM_GID) == DM_EGID) {
699 delaymagic &= ~DM_EGID;
701 # endif /* HAS_SETEGID */
702 if (delaymagic & DM_GID) {
704 DIE("No setregid available");
707 # endif /* HAS_SETREGID */
708 #endif /* HAS_SETRESGID */
710 egid = (int)getegid();
712 tainting |= (uid && (euid != uid || egid != gid));
715 if (GIMME == G_ARRAY) {
719 SP = firstrelem + (lastlelem - firstlelem);
726 SETi(lastrelem - firstrelem + 1);
734 register PMOP *pm = cPMOP;
741 register REGEXP *rx = pm->op_pmregexp;
745 I32 oldsave = savestack_ix;
747 if (op->op_flags & OPf_STACKED)
756 DIE("panic: do_match");
758 if (pm->op_pmflags & PMf_USED) {
759 if (gimme == G_ARRAY)
764 if (!rx->prelen && curpm) {
766 rx = pm->op_pmregexp;
769 if (global = pm->op_pmflags & PMf_GLOBAL) {
771 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
772 MAGIC* mg = mg_find(TARG, 'g');
773 if (mg && mg->mg_len >= 0) {
774 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
775 minmatch = (mg->mg_flags & MGf_MINMATCH);
779 if (!rx->nparens && !global)
780 gimme = G_SCALAR; /* accidental array context? */
781 safebase = (gimme == G_ARRAY) || global;
782 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
784 multiline = pm->op_pmflags & PMf_MULTILINE;
788 if (global && rx->startp[0]) {
792 minmatch = (s == rx->startp[0]);
794 if (pm->op_pmshort) {
795 if (pm->op_pmflags & PMf_SCANFIRST) {
796 if (SvSCREAM(TARG)) {
797 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
799 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
801 else if (pm->op_pmflags & PMf_ALL)
804 else if (!(s = fbm_instr((unsigned char*)s,
805 (unsigned char*)strend, pm->op_pmshort)))
807 else if (pm->op_pmflags & PMf_ALL)
809 if (s && rx->regback >= 0) {
810 ++BmUSEFUL(pm->op_pmshort);
818 else if (!multiline) {
819 if (*SvPVX(pm->op_pmshort) != *s ||
820 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
821 if (pm->op_pmflags & PMf_FOLD) {
822 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
829 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
830 SvREFCNT_dec(pm->op_pmshort);
831 pm->op_pmshort = Nullsv; /* opt is being useless */
834 if (pregexec(rx, s, strend, truebase, minmatch,
835 SvSCREAM(TARG) ? TARG : Nullsv,
838 if (pm->op_pmflags & PMf_ONCE)
839 pm->op_pmflags |= PMf_USED;
847 if (gimme == G_ARRAY) {
851 if (global && !iters)
855 EXTEND(SP, iters + i);
856 for (i = !i; i <= iters; i++) {
857 PUSHs(sv_newmortal());
859 if ((s = rx->startp[i]) && rx->endp[i] ) {
860 len = rx->endp[i] - s;
861 sv_setpvn(*SP, s, len);
865 truebase = rx->subbeg;
866 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
870 LEAVE_SCOPE(oldsave);
876 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
877 mg = mg_find(TARG, 'g');
879 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
880 mg = mg_find(TARG, 'g');
883 mg->mg_len = rx->endp[0] - truebase;
884 if (rx->startp[0] == rx->endp[0])
885 mg->mg_flags |= MGf_MINMATCH;
887 mg->mg_flags &= ~MGf_MINMATCH;
892 LEAVE_SCOPE(oldsave);
897 ++BmUSEFUL(pm->op_pmshort);
899 if (pm->op_pmflags & PMf_ONCE)
900 pm->op_pmflags |= PMf_USED;
902 rx->subbeg = truebase;
905 rx->endp[0] = s + SvCUR(pm->op_pmshort);
912 Safefree(rx->subbase);
913 tmps = rx->subbase = savepvn(t, strend-t);
915 rx->subend = tmps + (strend-t);
916 tmps = rx->startp[0] = tmps + (s - t);
917 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
919 LEAVE_SCOPE(oldsave);
924 ++BmUSEFUL(pm->op_pmshort);
928 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
929 MAGIC* mg = mg_find(TARG, 'g');
934 LEAVE_SCOPE(oldsave);
935 if (gimme == G_ARRAY)
948 register IO *io = GvIO(last_in_gv);
949 register I32 type = op->op_type;
955 if (IoFLAGS(io) & IOf_ARGV) {
956 if (IoFLAGS(io) & IOf_START) {
957 IoFLAGS(io) &= ~IOf_START;
959 if (av_len(GvAVn(last_in_gv)) < 0) {
960 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
961 av_push(GvAVn(last_in_gv), tmpstr);
964 fp = nextargv(last_in_gv);
965 if (!fp) { /* Note: fp != IoIFP(io) */
966 (void)do_close(last_in_gv, FALSE); /* now it does*/
967 IoFLAGS(io) |= IOf_START;
970 else if (type == OP_GLOB) {
971 SV *tmpcmd = NEWSV(55, 0);
975 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
976 /* since spawning off a process is a real performance hit */
979 #include <lib$routines.h>
982 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
983 char vmsspec[NAM$C_MAXRSS+1];
984 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
985 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
986 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
989 struct dsc$descriptor_s wilddsc
990 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
991 struct dsc$descriptor_vs rsdsc
992 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
993 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
995 /* We could find out if there's an explicit dev/dir or version
996 by peeking into lib$find_file's internal context at
997 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
998 but that's unsupported, so I don't want to do it now and
999 have it bite someone in the future. */
1000 strcat(tmpfnam,tmpnam(NULL));
1001 cp = SvPV(tmpglob,i);
1003 if (cp[i] == ';') hasver = 1;
1005 if (sts) hasver = 1;
1009 hasdir = isunix = 1;
1012 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1017 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
1018 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1019 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1020 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1021 &dfltdsc,NULL,NULL,NULL))&1)) {
1022 end = rstr + (unsigned long int) *rslt;
1023 if (!hasver) while (*end != ';') end--;
1024 *(end++) = '\n'; *end = '\0';
1025 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1027 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1032 while (*(--begin) != ']' && *begin != '>') ;
1035 ok = (fputs(begin,tmpfp) != EOF);
1037 if (cxt) (void)lib$find_file_end(&cxt);
1038 if (ok && sts != RMS$_NMF &&
1039 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1042 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1050 IoIFP(io) = fp = tmpfp;
1057 sv_setpv(tmpcmd, "for a in ");
1058 sv_catsv(tmpcmd, tmpglob);
1059 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1061 sv_setpv(tmpcmd, "perlglob ");
1062 sv_catsv(tmpcmd, tmpglob);
1063 sv_catpv(tmpcmd, " |");
1067 sv_setpvn(tmpcmd, cshname, cshlen);
1068 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1069 sv_catsv(tmpcmd, tmpglob);
1070 sv_catpv(tmpcmd, "' 2>/dev/null |");
1072 sv_setpv(tmpcmd, "echo ");
1073 sv_catsv(tmpcmd, tmpglob);
1075 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1077 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1080 #endif /* !DOSISH */
1081 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1082 FALSE, 0, 0, Nullfp);
1088 else if (type == OP_GLOB)
1092 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1093 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1094 if (GIMME == G_SCALAR) {
1095 (void)SvOK_off(TARG);
1100 if (GIMME == G_ARRAY) {
1101 sv = sv_2mortal(NEWSV(57, 80));
1106 (void)SvUPGRADE(sv, SVt_PV);
1107 tmplen = SvLEN(sv); /* remember if already alloced */
1109 Sv_Grow(sv, 80); /* try short-buffering it */
1110 if (type == OP_RCATLINE)
1116 if (!sv_gets(sv, fp, offset)) {
1118 if (IoFLAGS(io) & IOf_ARGV) {
1119 fp = nextargv(last_in_gv);
1122 (void)do_close(last_in_gv, FALSE);
1123 IoFLAGS(io) |= IOf_START;
1125 else if (type == OP_GLOB) {
1126 (void)do_close(last_in_gv, FALSE);
1128 if (GIMME == G_SCALAR) {
1129 (void)SvOK_off(TARG);
1138 SvTAINT(sv); /* Anything from the outside world...*/
1140 if (type == OP_GLOB) {
1143 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1144 tmps = SvEND(sv) - 1;
1145 if (*tmps == *SvPVX(rs)) {
1150 for (tmps = SvPVX(sv); *tmps; tmps++)
1151 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1152 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1154 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1155 (void)POPs; /* Unmatched wildcard? Chuck it... */
1159 if (GIMME == G_ARRAY) {
1160 if (SvLEN(sv) - SvCUR(sv) > 20) {
1161 SvLEN_set(sv, SvCUR(sv)+1);
1162 Renew(SvPVX(sv), SvLEN(sv), char);
1164 sv = sv_2mortal(NEWSV(58, 80));
1167 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1168 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1172 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1173 Renew(SvPVX(sv), SvLEN(sv), char);
1182 register CONTEXT *cx;
1186 * We don't just use the GIMME macro here because it assumes there's
1187 * already a context, which ain't necessarily so at initial startup.
1190 if (op->op_flags & OPf_KNOW)
1191 gimme = op->op_flags & OPf_LIST;
1192 else if (cxstack_ix >= 0)
1193 gimme = cxstack[cxstack_ix].blk_gimme;
1200 PUSHBLOCK(cx, CXt_BLOCK, sp);
1211 char *key = SvPV(keysv, keylen);
1213 I32 lval = op->op_flags & OPf_MOD;
1215 if (SvTYPE(hv) != SVt_PVHV)
1217 svp = hv_fetch(hv, key, keylen, lval);
1219 if (!svp || *svp == &sv_undef)
1221 if (op->op_private & OPpLVAL_INTRO)
1223 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1224 provide_ref(op, *svp);
1226 PUSHs(svp ? *svp : &sv_undef);
1233 register CONTEXT *cx;
1239 if (op->op_flags & OPf_SPECIAL) {
1240 cx = &cxstack[cxstack_ix];
1241 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1246 if (op->op_flags & OPf_KNOW)
1247 gimme = op->op_flags & OPf_LIST;
1248 else if (cxstack_ix >= 0)
1249 gimme = cxstack[cxstack_ix].blk_gimme;
1253 if (gimme == G_SCALAR) {
1254 if (op->op_private & OPpLEAVE_VOID)
1259 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1262 *MARK = sv_mortalcopy(TOPs);
1271 for (mark = newsp + 1; mark <= SP; mark++)
1272 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1273 *mark = sv_mortalcopy(*mark);
1274 /* in case LEAVE wipes old return values */
1276 curpm = newpm; /* Don't pop $1 et al till now */
1286 register CONTEXT *cx;
1291 cx = &cxstack[cxstack_ix];
1292 if (cx->cx_type != CXt_LOOP)
1293 DIE("panic: pp_iter");
1294 av = cx->blk_loop.iterary;
1295 if (av == curstack && cx->blk_loop.iterix >= cx->blk_oldsp)
1298 if (cx->blk_loop.iterix >= AvFILL(av))
1301 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1303 *cx->blk_loop.itervar = sv;
1306 *cx->blk_loop.itervar = &sv_undef;
1314 register PMOP *pm = cPMOP;
1329 register REGEXP *rx = pm->op_pmregexp;
1331 int force_on_match = 0;
1332 I32 oldsave = savestack_ix;
1334 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1336 if (op->op_flags & OPf_STACKED)
1342 s = SvPV(TARG, len);
1343 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1348 DIE("panic: do_subst");
1351 maxiters = (strend - s) + 10;
1353 if (!rx->prelen && curpm) {
1355 rx = pm->op_pmregexp;
1357 safebase = ((!rx || !rx->nparens) && !sawampersand);
1358 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1360 multiline = pm->op_pmflags & PMf_MULTILINE;
1363 if (pm->op_pmshort) {
1364 if (pm->op_pmflags & PMf_SCANFIRST) {
1365 if (SvSCREAM(TARG)) {
1366 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1368 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1371 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1374 if (s && rx->regback >= 0) {
1375 ++BmUSEFUL(pm->op_pmshort);
1383 else if (!multiline) {
1384 if (*SvPVX(pm->op_pmshort) != *s ||
1385 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1386 if (pm->op_pmflags & PMf_FOLD) {
1387 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1394 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1395 SvREFCNT_dec(pm->op_pmshort);
1396 pm->op_pmshort = Nullsv; /* opt is being useless */
1399 once = !(rpm->op_pmflags & PMf_GLOBAL);
1400 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1401 c = SvPV(dstr, clen);
1402 if (clen <= rx->minlen) {
1403 /* can do inplace substitution */
1404 if (pregexec(rx, s, strend, orig, 0,
1405 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1406 if (force_on_match) {
1408 s = SvPV_force(TARG, len);
1411 if (rx->subbase) /* oops, no we can't */
1415 SvSCREAM_off(TARG); /* disable possible screamer */
1420 if (m - s > strend - d) { /* faster to shorten from end */
1422 Copy(c, m, clen, char);
1427 Move(d, m, i, char);
1431 SvCUR_set(TARG, m - s);
1432 (void)SvPOK_only(TARG);
1435 LEAVE_SCOPE(oldsave);
1439 else if (i = m - s) { /* faster from front */
1447 Copy(c, m, clen, char);
1448 (void)SvPOK_only(TARG);
1451 LEAVE_SCOPE(oldsave);
1457 Copy(c, d, clen, char);
1458 (void)SvPOK_only(TARG);
1461 LEAVE_SCOPE(oldsave);
1466 (void)SvPOK_only(TARG);
1469 LEAVE_SCOPE(oldsave);
1475 if (iters++ > maxiters)
1476 DIE("Substitution loop");
1481 Move(s, d, i, char);
1485 Copy(c, d, clen, char);
1489 } while (pregexec(rx, s, strend, orig, s == m,
1490 Nullsv, TRUE)); /* (don't match same null twice) */
1493 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1494 Move(s, d, i+1, char); /* include the Null */
1496 (void)SvPOK_only(TARG);
1498 PUSHs(sv_2mortal(newSViv((I32)iters)));
1499 LEAVE_SCOPE(oldsave);
1503 LEAVE_SCOPE(oldsave);
1509 if (pregexec(rx, s, strend, orig, 0,
1510 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1512 if (force_on_match) {
1514 s = SvPV_force(TARG, len);
1517 dstr = NEWSV(25, sv_len(TARG));
1518 sv_setpvn(dstr, m, s-m);
1521 register CONTEXT *cx;
1523 RETURNOP(cPMOP->op_pmreplroot);
1526 if (iters++ > maxiters)
1527 DIE("Substitution loop");
1528 if (rx->subbase && rx->subbase != orig) {
1533 strend = s + (strend - m);
1536 sv_catpvn(dstr, s, m-s);
1539 sv_catpvn(dstr, c, clen);
1542 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1544 sv_catpvn(dstr, s, strend - s);
1546 (void)SvOOK_off(TARG);
1547 Safefree(SvPVX(TARG));
1548 SvPVX(TARG) = SvPVX(dstr);
1549 SvCUR_set(TARG, SvCUR(dstr));
1550 SvLEN_set(TARG, SvLEN(dstr));
1554 (void)SvPOK_only(TARG);
1556 PUSHs(sv_2mortal(newSViv((I32)iters)));
1557 LEAVE_SCOPE(oldsave);
1561 LEAVE_SCOPE(oldsave);
1565 ++BmUSEFUL(pm->op_pmshort);
1567 LEAVE_SCOPE(oldsave);
1576 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1578 LEAVE; /* exit inner scope */
1581 if (stack_base + *markstack_ptr > sp) {
1584 LEAVE; /* exit outer scope */
1585 (void)POPMARK; /* pop src */
1586 items = --*markstack_ptr - markstack_ptr[-1];
1587 (void)POPMARK; /* pop dst */
1588 SP = stack_base + POPMARK; /* pop original mark */
1589 if (GIMME != G_ARRAY) {
1600 ENTER; /* enter inner scope */
1603 src = stack_base[*markstack_ptr];
1607 RETURNOP(cLOGOP->op_other);
1618 register CONTEXT *cx;
1623 if (gimme == G_SCALAR) {
1626 if (SvFLAGS(TOPs) & SVs_TEMP)
1629 *MARK = sv_mortalcopy(TOPs);
1637 for (mark = newsp + 1; mark <= SP; mark++)
1638 if (!(SvFLAGS(*mark) & SVs_TEMP))
1639 *mark = sv_mortalcopy(*mark);
1640 /* in case LEAVE wipes old return values */
1643 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1644 AV* av = cx->blk_sub.argarray;
1649 curpm = newpm; /* Don't pop $1 et al till now */
1653 return pop_return();
1662 register CONTEXT *cx;
1664 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1667 DIE("Not a CODE reference");
1668 switch (SvTYPE(sv)) {
1673 if (sv == &sv_yes) /* unfound import, ignore */
1676 DIE(no_usym, "a subroutine");
1678 if (op->op_private & HINT_STRICT_REFS)
1679 DIE(no_symref, sym, "a subroutine");
1680 cv = perl_get_cv(sym, TRUE);
1684 if (SvTYPE(cv) == SVt_PVCV)
1689 DIE("Not a CODE reference");
1694 if (!(cv = GvCV((GV*)sv)))
1695 cv = sv_2cv(sv, &stash, &gv, TRUE);
1704 DIE("Not a CODE reference");
1706 if (!CvROOT(cv) && !CvXSUB(cv)) {
1707 if (gv = CvGV(cv)) {
1710 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1712 if (SvTYPE(sv) == SVt_PVGV) {
1713 SvREFCNT_dec(GvCV((GV*)sv));
1714 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1718 tmpstr = sv_newmortal();
1719 gv_efullname(tmpstr, gv);
1720 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1721 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1723 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1725 sv_unmagic(GvSV(CvGV(cv)), 't');
1729 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1731 DIE("Undefined subroutine called");
1735 if ((op->op_private & OPpENTERSUB_DB)) {
1739 if ( CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)
1740 || strEQ(GvNAME(gv), "END") ) {
1741 /* GV is potentially non-unique */
1742 sv_setsv(sv, newRV((SV*)cv));
1745 gv_efullname(sv,gv);
1748 if (CvXSUB(cv)) curcopdb = curcop;
1750 DIE("No DBsub routine");
1754 if (CvOLDSTYLE(cv)) {
1755 I32 (*fp3)_((int,int,int));
1757 register I32 items = SP - MARK;
1758 /* We dont worry to copy from @_. */
1763 stack_sp = mark + 1;
1764 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1765 items = (*fp3)(CvXSUBANY(cv).any_i32,
1766 MARK - stack_base + 1,
1768 stack_sp = stack_base + items;
1771 I32 markix = TOPMARK;
1776 /* Need to copy @_ to stack. Alternative may be to
1777 * switch stack to @_, and copy return values
1778 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1779 AV* av = GvAV(defgv);
1780 I32 items = AvFILL(av) + 1;
1783 /* Mark is at the end of the stack. */
1785 Copy(AvARRAY(av), sp + 1, items, SV*);
1790 if (curcopdb) { /* We assume that the first
1791 XSUB in &DB::sub is the
1797 /* Do we need to open block here? XXXX */
1798 (void)(*CvXSUB(cv))(cv);
1800 /* Enforce some sanity in scalar context. */
1801 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1802 if (markix > stack_sp - stack_base)
1803 *(stack_base + markix) = &sv_undef;
1805 *(stack_base + markix) = *stack_sp;
1806 stack_sp = stack_base + markix;
1814 register I32 items = SP - MARK;
1815 AV* padlist = CvPADLIST(cv);
1816 SV** svp = AvARRAY(padlist);
1817 push_return(op->op_next);
1818 PUSHBLOCK(cx, CXt_SUB, MARK);
1821 if (CvDEPTH(cv) < 2)
1822 (void)SvREFCNT_inc(cv);
1823 else { /* save temporaries on recursion? */
1824 if (CvDEPTH(cv) == 100 && dowarn)
1825 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1826 if (CvDEPTH(cv) > AvFILL(padlist)) {
1828 AV *newpad = newAV();
1829 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1830 I32 ix = AvFILL((AV*)svp[1]);
1831 svp = AvARRAY(svp[0]);
1832 for ( ;ix > 0; ix--) {
1833 if (svp[ix] != &sv_undef) {
1834 char *name = SvPVX(svp[ix]);
1835 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1836 av_store(newpad, ix,
1837 SvREFCNT_inc(oldpad[ix]) );
1839 else { /* our own lexical */
1841 av_store(newpad, ix, sv = (SV*)newAV());
1842 else if (*name == '%')
1843 av_store(newpad, ix, sv = (SV*)newHV());
1845 av_store(newpad, ix, sv = NEWSV(0,0));
1850 av_store(newpad, ix, sv = NEWSV(0,0));
1854 av = newAV(); /* will be @_ */
1856 av_store(newpad, 0, (SV*)av);
1857 AvFLAGS(av) = AVf_REIFY;
1858 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1859 AvFILL(padlist) = CvDEPTH(cv);
1860 svp = AvARRAY(padlist);
1864 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1866 AV* av = (AV*)curpad[0];
1873 cx->blk_sub.savearray = GvAV(defgv);
1874 cx->blk_sub.argarray = av;
1875 GvAV(defgv) = cx->blk_sub.argarray;
1878 if (items > AvMAX(av) + 1) {
1880 if (AvARRAY(av) != ary) {
1881 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1882 SvPVX(av) = (char*)ary;
1884 if (items > AvMAX(av) + 1) {
1885 AvMAX(av) = items - 1;
1886 Renew(ary,items,SV*);
1888 SvPVX(av) = (char*)ary;
1891 Copy(MARK,AvARRAY(av),items,SV*);
1892 AvFILL(av) = items - 1;
1900 RETURNOP(CvSTART(cv));
1910 I32 lval = op->op_flags & OPf_MOD;
1913 elem -= curcop->cop_arybase;
1914 if (SvTYPE(av) != SVt_PVAV)
1916 svp = av_fetch(av, elem, lval);
1918 if (!svp || *svp == &sv_undef)
1919 DIE(no_aelem, elem);
1920 if (op->op_private & OPpLVAL_INTRO)
1922 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1923 provide_ref(op, *svp);
1925 PUSHs(svp ? *svp : &sv_undef);
1939 (void)SvUPGRADE(sv, SVt_RV);
1940 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1941 (SV*)newHV() : (SV*)newAV());
1956 sv = *(stack_base + TOPMARK + 1);
1969 !(packname = SvPV(sv, packlen)) ||
1970 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1971 !(ob=(SV*)GvIO(iogv)))
1973 char *name = SvPV(nm, na);
1975 if (!packname || !isALPHA(*packname))
1976 DIE("Can't call method \"%s\" without a package or object reference", name);
1977 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
1978 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
1979 stash = gv_stashpvn(packname, packlen, TRUE);
1981 DIE("Can't call method \"%s\" in empty package \"%s\"",
1984 gv = gv_fetchmethod(stash,name);
1986 DIE("Can't locate object method \"%s\" via package \"%s\"",
1991 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
1994 if (!ob || !SvOBJECT(ob)) {
1995 char *name = SvPV(nm, na);
1996 DIE("Can't call method \"%s\" on unblessed reference", name);
1999 if (!gv) { /* nothing cached */
2000 char *name = SvPV(nm, na);
2001 gv = gv_fetchmethod(SvSTASH(ob),name);
2003 DIE("Can't locate object method \"%s\" via package \"%s\"",
2004 name, HvNAME(SvSTASH(ob)));