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 SV* sv = curpad[op->op_targ];
236 (void)SvUPGRADE(sv, SVt_RV);
237 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
238 (SV*)newHV() : (SV*)newAV());
249 last_in_gv = (GV*)(*stack_sp--);
250 return do_readline();
255 dSP; tryAMAGICbinSET(eq,0);
258 SETs((TOPn == value) ? &sv_yes : &sv_no);
268 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
283 RETURNOP(cLOGOP->op_other);
289 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
292 SETn( left + right );
300 AV *av = GvAV((GV*)cSVOP->op_sv);
301 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
302 PUSHs(svp ? *svp : &sv_undef);
310 do_join(TARG, *MARK, MARK, SP);
323 /* Oversized hot code. */
327 dSP; dMARK; dORIGMARK;
332 if (op->op_flags & OPf_STACKED)
336 if (!(io = GvIO(gv))) {
338 SV* sv = sv_newmortal();
340 warn("Filehandle %s never opened", SvPV(sv,na));
343 SETERRNO(EBADF,RMS$_IFI);
346 else if (!(fp = IoOFP(io))) {
348 SV* sv = sv_newmortal();
351 warn("Filehandle %s opened only for input", SvPV(sv,na));
353 warn("print on closed filehandle %s", SvPV(sv,na));
355 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
362 if (!do_print(*MARK, fp))
366 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
375 if (!do_print(*MARK, fp))
384 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
387 if (IoFLAGS(io) & IOf_FLUSH)
388 if (fflush(fp) == EOF)
411 if (SvTYPE(av) != SVt_PVAV)
412 DIE("Not an ARRAY reference");
413 if (op->op_private & OPpLVAL_INTRO)
414 av = (AV*)save_svref((SV**)sv);
415 if (op->op_flags & OPf_REF) {
421 if (SvTYPE(sv) == SVt_PVAV) {
423 if (op->op_flags & OPf_REF) {
429 if (SvTYPE(sv) != SVt_PVGV) {
432 if (SvGMAGICAL(sv)) {
438 if (op->op_flags & OPf_REF ||
439 op->op_private & HINT_STRICT_REFS)
440 DIE(no_usym, "an ARRAY");
441 if (GIMME == G_ARRAY)
446 if (op->op_private & HINT_STRICT_REFS)
447 DIE(no_symref, sym, "an ARRAY");
448 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
451 if (op->op_private & OPpLVAL_INTRO)
453 if (op->op_flags & OPf_REF) {
460 if (GIMME == G_ARRAY) {
461 I32 maxarg = AvFILL(av) + 1;
463 Copy(AvARRAY(av), SP+1, maxarg, SV*);
468 I32 maxarg = AvFILL(av) + 1;
484 if (SvTYPE(hv) != SVt_PVHV)
485 DIE("Not a HASH reference");
486 if (op->op_private & OPpLVAL_INTRO)
487 hv = (HV*)save_svref((SV**)sv);
488 if (op->op_flags & OPf_REF) {
494 if (SvTYPE(sv) == SVt_PVHV) {
496 if (op->op_flags & OPf_REF) {
502 if (SvTYPE(sv) != SVt_PVGV) {
505 if (SvGMAGICAL(sv)) {
511 if (op->op_flags & OPf_REF ||
512 op->op_private & HINT_STRICT_REFS)
513 DIE(no_usym, "a HASH");
514 if (GIMME == G_ARRAY) {
521 if (op->op_private & HINT_STRICT_REFS)
522 DIE(no_symref, sym, "a HASH");
523 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
526 if (op->op_private & OPpLVAL_INTRO)
528 if (op->op_flags & OPf_REF) {
535 if (GIMME == G_ARRAY) { /* array wanted */
542 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
555 SV **lastlelem = stack_sp;
556 SV **lastrelem = stack_base + POPMARK;
557 SV **firstrelem = stack_base + POPMARK + 1;
558 SV **firstlelem = lastrelem + 1;
570 delaymagic = DM_DELAY; /* catch simultaneous items */
572 /* If there's a common identifier on both sides we have to take
573 * special care that assigning the identifier on the left doesn't
574 * clobber a value on the right that's used later in the list.
576 if (op->op_private & OPpASSIGN_COMMON) {
577 for (relem = firstrelem; relem <= lastrelem; relem++) {
580 *relem = sv_mortalcopy(sv);
588 while (lelem <= lastlelem) {
589 tainted = 0; /* Each item stands on its own, taintwise. */
591 switch (SvTYPE(sv)) {
594 magic = SvMAGICAL(ary) != 0;
598 while (relem <= lastrelem) { /* gobble up all the rest */
603 (void)av_store(ary,i++,sv);
614 magic = SvMAGICAL(hash) != 0;
617 while (relem < lastrelem) { /* gobble up all the rest */
622 sv = &sv_no, relem++;
623 tmps = SvPV(sv, len);
624 tmpstr = NEWSV(29,0);
626 sv_setsv(tmpstr,*relem); /* value */
628 (void)hv_store(hash,tmps,len,tmpstr,0);
636 if (SvTHINKFIRST(sv)) {
637 if (SvREADONLY(sv) && curcop != &compiling) {
638 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
640 if (relem <= lastrelem)
647 if (relem <= lastrelem) {
648 sv_setsv(sv, *relem);
652 sv_setsv(sv, &sv_undef);
657 if (delaymagic & ~DM_DELAY) {
658 if (delaymagic & DM_UID) {
660 (void)setresuid(uid,euid,(Uid_t)-1);
663 (void)setreuid(uid,euid);
666 if ((delaymagic & DM_UID) == DM_RUID) {
668 delaymagic &= ~DM_RUID;
670 # endif /* HAS_SETRUID */
672 if ((delaymagic & DM_UID) == DM_EUID) {
674 delaymagic &= ~DM_EUID;
676 # endif /* HAS_SETEUID */
677 if (delaymagic & DM_UID) {
679 DIE("No setreuid available");
682 # endif /* HAS_SETREUID */
683 #endif /* HAS_SETRESUID */
685 euid = (int)geteuid();
687 if (delaymagic & DM_GID) {
689 (void)setresgid(gid,egid,(Gid_t)-1);
692 (void)setregid(gid,egid);
695 if ((delaymagic & DM_GID) == DM_RGID) {
697 delaymagic &= ~DM_RGID;
699 # endif /* HAS_SETRGID */
701 if ((delaymagic & DM_GID) == DM_EGID) {
703 delaymagic &= ~DM_EGID;
705 # endif /* HAS_SETEGID */
706 if (delaymagic & DM_GID) {
708 DIE("No setregid available");
711 # endif /* HAS_SETREGID */
712 #endif /* HAS_SETRESGID */
714 egid = (int)getegid();
716 tainting |= (uid && (euid != uid || egid != gid));
719 if (GIMME == G_ARRAY) {
723 SP = firstrelem + (lastlelem - firstlelem);
730 SETi(lastrelem - firstrelem + 1);
738 register PMOP *pm = cPMOP;
745 register REGEXP *rx = pm->op_pmregexp;
749 I32 oldsave = savestack_ix;
751 if (op->op_flags & OPf_STACKED)
760 DIE("panic: do_match");
762 if (pm->op_pmflags & PMf_USED) {
763 if (gimme == G_ARRAY)
768 if (!rx->prelen && curpm) {
770 rx = pm->op_pmregexp;
773 if (global = pm->op_pmflags & PMf_GLOBAL) {
775 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
776 MAGIC* mg = mg_find(TARG, 'g');
777 if (mg && mg->mg_len >= 0) {
778 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
779 minmatch = (mg->mg_flags & MGf_MINMATCH);
783 if (!rx->nparens && !global)
784 gimme = G_SCALAR; /* accidental array context? */
785 safebase = (gimme == G_ARRAY) || global;
786 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
788 multiline = pm->op_pmflags & PMf_MULTILINE;
792 if (global && rx->startp[0]) {
796 minmatch = (s == rx->startp[0]);
798 if (pm->op_pmshort) {
799 if (pm->op_pmflags & PMf_SCANFIRST) {
800 if (SvSCREAM(TARG)) {
801 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
803 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
805 else if (pm->op_pmflags & PMf_ALL)
808 else if (!(s = fbm_instr((unsigned char*)s,
809 (unsigned char*)strend, pm->op_pmshort)))
811 else if (pm->op_pmflags & PMf_ALL)
813 if (s && rx->regback >= 0) {
814 ++BmUSEFUL(pm->op_pmshort);
822 else if (!multiline) {
823 if (*SvPVX(pm->op_pmshort) != *s ||
824 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
825 if (pm->op_pmflags & PMf_FOLD) {
826 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
833 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
834 SvREFCNT_dec(pm->op_pmshort);
835 pm->op_pmshort = Nullsv; /* opt is being useless */
838 if (pregexec(rx, s, strend, truebase, minmatch,
839 SvSCREAM(TARG) ? TARG : Nullsv,
842 if (pm->op_pmflags & PMf_ONCE)
843 pm->op_pmflags |= PMf_USED;
851 if (gimme == G_ARRAY) {
855 if (global && !iters)
859 EXTEND(SP, iters + i);
860 for (i = !i; i <= iters; i++) {
861 PUSHs(sv_newmortal());
863 if ((s = rx->startp[i]) && rx->endp[i] ) {
864 len = rx->endp[i] - s;
865 sv_setpvn(*SP, s, len);
869 truebase = rx->subbeg;
870 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
874 LEAVE_SCOPE(oldsave);
880 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
881 mg = mg_find(TARG, 'g');
883 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
884 mg = mg_find(TARG, 'g');
887 mg->mg_len = rx->endp[0] - truebase;
888 if (rx->startp[0] == rx->endp[0])
889 mg->mg_flags |= MGf_MINMATCH;
891 mg->mg_flags &= ~MGf_MINMATCH;
896 LEAVE_SCOPE(oldsave);
901 ++BmUSEFUL(pm->op_pmshort);
903 if (pm->op_pmflags & PMf_ONCE)
904 pm->op_pmflags |= PMf_USED;
906 rx->subbeg = truebase;
909 rx->endp[0] = s + SvCUR(pm->op_pmshort);
916 Safefree(rx->subbase);
917 tmps = rx->subbase = savepvn(t, strend-t);
919 rx->subend = tmps + (strend-t);
920 tmps = rx->startp[0] = tmps + (s - t);
921 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
923 LEAVE_SCOPE(oldsave);
928 ++BmUSEFUL(pm->op_pmshort);
932 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
933 MAGIC* mg = mg_find(TARG, 'g');
938 LEAVE_SCOPE(oldsave);
939 if (gimme == G_ARRAY)
952 register IO *io = GvIO(last_in_gv);
953 register I32 type = op->op_type;
959 if (IoFLAGS(io) & IOf_ARGV) {
960 if (IoFLAGS(io) & IOf_START) {
961 IoFLAGS(io) &= ~IOf_START;
963 if (av_len(GvAVn(last_in_gv)) < 0) {
964 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
965 av_push(GvAVn(last_in_gv), tmpstr);
968 fp = nextargv(last_in_gv);
969 if (!fp) { /* Note: fp != IoIFP(io) */
970 (void)do_close(last_in_gv, FALSE); /* now it does*/
971 IoFLAGS(io) |= IOf_START;
974 else if (type == OP_GLOB) {
975 SV *tmpcmd = NEWSV(55, 0);
979 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
980 /* since spawning off a process is a real performance hit */
983 #include <lib$routines.h>
986 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
987 char vmsspec[NAM$C_MAXRSS+1];
988 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
989 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
990 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
993 struct dsc$descriptor_s wilddsc
994 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
995 struct dsc$descriptor_vs rsdsc
996 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
997 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
999 /* We could find out if there's an explicit dev/dir or version
1000 by peeking into lib$find_file's internal context at
1001 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1002 but that's unsupported, so I don't want to do it now and
1003 have it bite someone in the future. */
1004 strcat(tmpfnam,tmpnam(NULL));
1005 cp = SvPV(tmpglob,i);
1007 if (cp[i] == ';') hasver = 1;
1009 if (sts) hasver = 1;
1013 hasdir = isunix = 1;
1016 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1021 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
1022 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1023 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1024 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1025 &dfltdsc,NULL,NULL,NULL))&1)) {
1026 end = rstr + (unsigned long int) *rslt;
1027 if (!hasver) while (*end != ';') end--;
1028 *(end++) = '\n'; *end = '\0';
1029 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1031 if (isunix) trim_unixpath(SvPVX(tmpglob),rstr);
1036 while (*(--begin) != ']' && *begin != '>') ;
1039 ok = (fputs(begin,tmpfp) != EOF);
1041 if (cxt) (void)lib$find_file_end(&cxt);
1042 if (ok && sts != RMS$_NMF &&
1043 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1046 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1054 IoIFP(io) = fp = tmpfp;
1060 sv_setpv(tmpcmd, "perlglob ");
1061 sv_catsv(tmpcmd, tmpglob);
1062 sv_catpv(tmpcmd, " |");
1065 sv_setpvn(tmpcmd, cshname, cshlen);
1066 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1067 sv_catsv(tmpcmd, tmpglob);
1068 sv_catpv(tmpcmd, "' 2>/dev/null |");
1070 sv_setpv(tmpcmd, "echo ");
1071 sv_catsv(tmpcmd, tmpglob);
1073 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1075 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1079 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1080 FALSE, 0, 0, Nullfp);
1086 else if (type == OP_GLOB)
1090 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1091 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1092 if (GIMME == G_SCALAR) {
1093 (void)SvOK_off(TARG);
1098 if (GIMME == G_ARRAY) {
1099 sv = sv_2mortal(NEWSV(57, 80));
1104 (void)SvUPGRADE(sv, SVt_PV);
1105 tmplen = SvLEN(sv); /* remember if already alloced */
1107 Sv_Grow(sv, 80); /* try short-buffering it */
1108 if (type == OP_RCATLINE)
1114 if (!sv_gets(sv, fp, offset)) {
1116 if (IoFLAGS(io) & IOf_ARGV) {
1117 fp = nextargv(last_in_gv);
1120 (void)do_close(last_in_gv, FALSE);
1121 IoFLAGS(io) |= IOf_START;
1123 else if (type == OP_GLOB) {
1124 (void)do_close(last_in_gv, FALSE);
1126 if (GIMME == G_SCALAR) {
1127 (void)SvOK_off(TARG);
1136 SvTAINT(sv); /* Anything from the outside world...*/
1138 if (type == OP_GLOB) {
1141 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1142 tmps = SvEND(sv) - 1;
1143 if (*tmps == *SvPVX(rs)) {
1148 for (tmps = SvPVX(sv); *tmps; tmps++)
1149 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1150 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1152 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1153 (void)POPs; /* Unmatched wildcard? Chuck it... */
1157 if (GIMME == G_ARRAY) {
1158 if (SvLEN(sv) - SvCUR(sv) > 20) {
1159 SvLEN_set(sv, SvCUR(sv)+1);
1160 Renew(SvPVX(sv), SvLEN(sv), char);
1162 sv = sv_2mortal(NEWSV(58, 80));
1165 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1166 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1170 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1171 Renew(SvPVX(sv), SvLEN(sv), char);
1180 register CONTEXT *cx;
1184 * We don't just use the GIMME macro here because it assumes there's
1185 * already a context, which ain't necessarily so at initial startup.
1188 if (op->op_flags & OPf_KNOW)
1189 gimme = op->op_flags & OPf_LIST;
1190 else if (cxstack_ix >= 0)
1191 gimme = cxstack[cxstack_ix].blk_gimme;
1198 PUSHBLOCK(cx, CXt_BLOCK, sp);
1209 char *key = SvPV(keysv, keylen);
1211 I32 lval = op->op_flags & OPf_MOD;
1213 if (SvTYPE(hv) != SVt_PVHV)
1215 svp = hv_fetch(hv, key, keylen, lval);
1217 if (!svp || *svp == &sv_undef)
1219 if (op->op_private & OPpLVAL_INTRO)
1221 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1226 (void)SvUPGRADE(sv, SVt_RV);
1227 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1228 (SV*)newHV() : (SV*)newAV());
1234 PUSHs(svp ? *svp : &sv_undef);
1241 register CONTEXT *cx;
1247 if (op->op_flags & OPf_SPECIAL) {
1248 cx = &cxstack[cxstack_ix];
1249 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1254 if (op->op_flags & OPf_KNOW)
1255 gimme = op->op_flags & OPf_LIST;
1256 else if (cxstack_ix >= 0)
1257 gimme = cxstack[cxstack_ix].blk_gimme;
1261 if (gimme == G_SCALAR) {
1262 if (op->op_private & OPpLEAVE_VOID)
1267 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1270 *MARK = sv_mortalcopy(TOPs);
1279 for (mark = newsp + 1; mark <= SP; mark++)
1280 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1281 *mark = sv_mortalcopy(*mark);
1282 /* in case LEAVE wipes old return values */
1284 curpm = newpm; /* Don't pop $1 et al till now */
1294 register CONTEXT *cx;
1299 cx = &cxstack[cxstack_ix];
1300 if (cx->cx_type != CXt_LOOP)
1301 DIE("panic: pp_iter");
1302 av = cx->blk_loop.iterary;
1303 if (av == stack && cx->blk_loop.iterix >= cx->blk_oldsp)
1306 if (cx->blk_loop.iterix >= AvFILL(av))
1309 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1311 *cx->blk_loop.itervar = sv;
1314 *cx->blk_loop.itervar = &sv_undef;
1322 register PMOP *pm = cPMOP;
1337 register REGEXP *rx = pm->op_pmregexp;
1339 int force_on_match = 0;
1340 I32 oldsave = savestack_ix;
1342 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1344 if (op->op_flags & OPf_STACKED)
1350 s = SvPV(TARG, len);
1351 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1356 DIE("panic: do_subst");
1359 maxiters = (strend - s) + 10;
1361 if (!rx->prelen && curpm) {
1363 rx = pm->op_pmregexp;
1365 safebase = ((!rx || !rx->nparens) && !sawampersand);
1366 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1368 multiline = pm->op_pmflags & PMf_MULTILINE;
1371 if (pm->op_pmshort) {
1372 if (pm->op_pmflags & PMf_SCANFIRST) {
1373 if (SvSCREAM(TARG)) {
1374 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1376 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1379 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1382 if (s && rx->regback >= 0) {
1383 ++BmUSEFUL(pm->op_pmshort);
1391 else if (!multiline) {
1392 if (*SvPVX(pm->op_pmshort) != *s ||
1393 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1394 if (pm->op_pmflags & PMf_FOLD) {
1395 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1402 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1403 SvREFCNT_dec(pm->op_pmshort);
1404 pm->op_pmshort = Nullsv; /* opt is being useless */
1407 once = !(rpm->op_pmflags & PMf_GLOBAL);
1408 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1409 c = SvPV(dstr, clen);
1410 if (clen <= rx->minlen) {
1411 /* can do inplace substitution */
1412 if (pregexec(rx, s, strend, orig, 0,
1413 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1414 if (force_on_match) {
1416 s = SvPV_force(TARG, len);
1419 if (rx->subbase) /* oops, no we can't */
1423 SvSCREAM_off(TARG); /* disable possible screamer */
1428 if (m - s > strend - d) { /* faster to shorten from end */
1430 Copy(c, m, clen, char);
1435 Move(d, m, i, char);
1439 SvCUR_set(TARG, m - s);
1440 (void)SvPOK_only(TARG);
1443 LEAVE_SCOPE(oldsave);
1447 else if (i = m - s) { /* faster from front */
1455 Copy(c, m, clen, char);
1456 (void)SvPOK_only(TARG);
1459 LEAVE_SCOPE(oldsave);
1465 Copy(c, d, clen, char);
1466 (void)SvPOK_only(TARG);
1469 LEAVE_SCOPE(oldsave);
1474 (void)SvPOK_only(TARG);
1477 LEAVE_SCOPE(oldsave);
1483 if (iters++ > maxiters)
1484 DIE("Substitution loop");
1489 Move(s, d, i, char);
1493 Copy(c, d, clen, char);
1497 } while (pregexec(rx, s, strend, orig, s == m,
1498 Nullsv, TRUE)); /* (don't match same null twice) */
1501 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1502 Move(s, d, i+1, char); /* include the Null */
1504 (void)SvPOK_only(TARG);
1506 PUSHs(sv_2mortal(newSViv((I32)iters)));
1507 LEAVE_SCOPE(oldsave);
1511 LEAVE_SCOPE(oldsave);
1517 if (pregexec(rx, s, strend, orig, 0,
1518 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1520 if (force_on_match) {
1522 s = SvPV_force(TARG, len);
1525 dstr = NEWSV(25, sv_len(TARG));
1526 sv_setpvn(dstr, m, s-m);
1529 register CONTEXT *cx;
1531 RETURNOP(cPMOP->op_pmreplroot);
1534 if (iters++ > maxiters)
1535 DIE("Substitution loop");
1536 if (rx->subbase && rx->subbase != orig) {
1541 strend = s + (strend - m);
1544 sv_catpvn(dstr, s, m-s);
1547 sv_catpvn(dstr, c, clen);
1550 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1552 sv_catpvn(dstr, s, strend - s);
1554 (void)SvOOK_off(TARG);
1555 Safefree(SvPVX(TARG));
1556 SvPVX(TARG) = SvPVX(dstr);
1557 SvCUR_set(TARG, SvCUR(dstr));
1558 SvLEN_set(TARG, SvLEN(dstr));
1562 (void)SvPOK_only(TARG);
1564 PUSHs(sv_2mortal(newSViv((I32)iters)));
1565 LEAVE_SCOPE(oldsave);
1569 LEAVE_SCOPE(oldsave);
1573 ++BmUSEFUL(pm->op_pmshort);
1575 LEAVE_SCOPE(oldsave);
1584 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1586 LEAVE; /* exit inner scope */
1589 if (stack_base + *markstack_ptr > sp) {
1592 LEAVE; /* exit outer scope */
1593 (void)POPMARK; /* pop src */
1594 items = --*markstack_ptr - markstack_ptr[-1];
1595 (void)POPMARK; /* pop dst */
1596 SP = stack_base + POPMARK; /* pop original mark */
1597 if (GIMME != G_ARRAY) {
1608 ENTER; /* enter inner scope */
1611 src = stack_base[*markstack_ptr];
1615 RETURNOP(cLOGOP->op_other);
1626 register CONTEXT *cx;
1631 if (gimme == G_SCALAR) {
1634 if (SvFLAGS(TOPs) & SVs_TEMP)
1637 *MARK = sv_mortalcopy(TOPs);
1645 for (mark = newsp + 1; mark <= SP; mark++)
1646 if (!(SvFLAGS(*mark) & SVs_TEMP))
1647 *mark = sv_mortalcopy(*mark);
1648 /* in case LEAVE wipes old return values */
1651 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1652 AV* av = cx->blk_sub.argarray;
1657 curpm = newpm; /* Don't pop $1 et al till now */
1661 return pop_return();
1670 register CONTEXT *cx;
1674 DIE("Not a CODE reference");
1675 switch (SvTYPE(sv)) {
1680 if (sv == &sv_yes) /* unfound import, ignore */
1683 DIE(no_usym, "a subroutine");
1685 if (op->op_private & HINT_STRICT_REFS)
1686 DIE(no_symref, sym, "a subroutine");
1687 cv = perl_get_cv(sym, TRUE);
1691 if (SvTYPE(cv) == SVt_PVCV)
1696 DIE("Not a CODE reference");
1701 if (!(cv = GvCV((GV*)sv)))
1702 cv = sv_2cv(sv, &stash, &gv, TRUE);
1711 DIE("Not a CODE reference");
1713 if (!CvROOT(cv) && !CvXSUB(cv)) {
1714 if (gv = CvGV(cv)) {
1717 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1719 if (SvTYPE(sv) == SVt_PVGV) {
1720 SvREFCNT_dec(GvCV((GV*)sv));
1721 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1725 tmpstr = sv_newmortal();
1726 gv_efullname(tmpstr, gv);
1727 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1728 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1730 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1732 sv_unmagic(GvSV(CvGV(cv)), 't');
1736 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1738 DIE("Undefined subroutine called");
1742 if ((op->op_private & OPpENTERSUB_DB) && !CvXSUB(cv)) {
1745 if (SvFLAGS(cv) & (SVpcv_ANON | SVpcv_CLONED)) /* Is GV potentially non-unique? */
1746 sv_setsv(sv, newRV((SV*)cv));
1749 gv_efullname(sv,gv);
1753 DIE("No DBsub routine");
1757 if (CvOLDSTYLE(cv)) {
1758 I32 (*fp3)_((int,int,int));
1760 register I32 items = SP - MARK;
1765 stack_sp = mark + 1;
1766 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1767 items = (*fp3)(CvXSUBANY(cv).any_i32,
1768 MARK - stack_base + 1,
1770 stack_sp = stack_base + items;
1773 I32 markix = TOPMARK;
1776 (void)(*CvXSUB(cv))(cv);
1778 /* Enforce some sanity in scalar context. */
1779 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1780 if (markix > stack_sp - stack_base)
1781 *(stack_base + markix) = &sv_undef;
1783 *(stack_base + markix) = *stack_sp;
1784 stack_sp = stack_base + markix;
1792 register I32 items = SP - MARK;
1793 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1794 AV* padlist = CvPADLIST(cv);
1795 SV** svp = AvARRAY(padlist);
1796 push_return(op->op_next);
1797 PUSHBLOCK(cx, CXt_SUB, MARK);
1800 if (CvDEPTH(cv) < 2)
1801 (void)SvREFCNT_inc(cv);
1802 else { /* save temporaries on recursion? */
1803 if (CvDEPTH(cv) == 100 && dowarn)
1804 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1805 if (CvDEPTH(cv) > AvFILL(padlist)) {
1807 AV *newpad = newAV();
1808 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1809 I32 ix = AvFILL((AV*)svp[1]);
1810 svp = AvARRAY(svp[0]);
1811 for ( ;ix > 0; ix--) {
1812 if (svp[ix] != &sv_undef) {
1813 char *name = SvPVX(svp[ix]);
1814 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1815 av_store(newpad, ix,
1816 SvREFCNT_inc(oldpad[ix]) );
1818 else { /* our own lexical */
1820 av_store(newpad, ix, sv = (SV*)newAV());
1821 else if (*name == '%')
1822 av_store(newpad, ix, sv = (SV*)newHV());
1824 av_store(newpad, ix, sv = NEWSV(0,0));
1829 av_store(newpad, ix, sv = NEWSV(0,0));
1833 av = newAV(); /* will be @_ */
1835 av_store(newpad, 0, (SV*)av);
1836 AvFLAGS(av) = AVf_REIFY;
1837 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1838 AvFILL(padlist) = CvDEPTH(cv);
1839 svp = AvARRAY(padlist);
1843 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1845 AV* av = (AV*)curpad[0];
1852 cx->blk_sub.savearray = GvAV(defgv);
1853 cx->blk_sub.argarray = av;
1854 GvAV(defgv) = cx->blk_sub.argarray;
1857 if (items > AvMAX(av) + 1) {
1859 if (AvARRAY(av) != ary) {
1860 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1861 SvPVX(av) = (char*)ary;
1863 if (items > AvMAX(av) + 1) {
1864 AvMAX(av) = items - 1;
1865 Renew(ary,items,SV*);
1867 SvPVX(av) = (char*)ary;
1870 Copy(MARK,AvARRAY(av),items,SV*);
1871 AvFILL(av) = items - 1;
1879 RETURNOP(CvSTART(cv));
1889 I32 lval = op->op_flags & OPf_MOD;
1892 elem -= curcop->cop_arybase;
1893 if (SvTYPE(av) != SVt_PVAV)
1895 svp = av_fetch(av, elem, lval);
1897 if (!svp || *svp == &sv_undef)
1898 DIE(no_aelem, elem);
1899 if (op->op_private & OPpLVAL_INTRO)
1901 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1906 (void)SvUPGRADE(sv, SVt_RV);
1907 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1908 (SV*)newHV() : (SV*)newAV());
1914 PUSHs(svp ? *svp : &sv_undef);
1927 sv = *(stack_base + TOPMARK + 1);
1939 !(packname = SvPV(sv, na)) ||
1940 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1941 !(ob=(SV*)GvIO(iogv)))
1943 char *name = SvPV(nm, na);
1945 if (!packname || !isALPHA(*packname))
1946 DIE("Can't call method \"%s\" without a package or object reference", name);
1947 if (!(stash = gv_stashpv(packname, FALSE))) {
1948 if (gv_stashpv("UNIVERSAL", FALSE))
1949 stash = gv_stashpv(packname, TRUE);
1951 DIE("Can't call method \"%s\" in empty package \"%s\"",
1954 gv = gv_fetchmethod(stash,name);
1956 DIE("Can't locate object method \"%s\" via package \"%s\"",
1961 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV(iogv));
1964 if (!ob || !SvOBJECT(ob)) {
1965 char *name = SvPV(nm, na);
1966 DIE("Can't call method \"%s\" on unblessed reference", name);
1969 if (!gv) { /* nothing cached */
1970 char *name = SvPV(nm, na);
1971 gv = gv_fetchmethod(SvSTASH(ob),name);
1973 DIE("Can't locate object method \"%s\" via package \"%s\"",
1974 name, HvNAME(SvSTASH(ob)));