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);
255 if (SvIVX(TOPs) == IV_MAX) {
256 sv_setnv(TOPs, (double)(SvIVX(TOPs)) + 1.0 );
260 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
276 RETURNOP(cLOGOP->op_other);
282 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
285 SETn( left + right );
293 AV *av = GvAV((GV*)cSVOP->op_sv);
294 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
295 PUSHs(svp ? *svp : &sv_undef);
303 do_join(TARG, *MARK, MARK, SP);
316 /* Oversized hot code. */
320 dSP; dMARK; dORIGMARK;
326 if (op->op_flags & OPf_STACKED)
330 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
336 perl_call_method("PRINT", G_SCALAR);
344 if (!(io = GvIO(gv))) {
346 SV* sv = sv_newmortal();
347 gv_fullname(sv, gv, Nullch);
348 warn("Filehandle %s never opened", SvPV(sv,na));
351 SETERRNO(EBADF,RMS$_IFI);
354 else if (!(fp = IoOFP(io))) {
356 SV* sv = sv_newmortal();
357 gv_fullname(sv, gv, Nullch);
359 warn("Filehandle %s opened only for input", SvPV(sv,na));
361 warn("print on closed filehandle %s", SvPV(sv,na));
363 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
370 if (!do_print(*MARK, fp))
374 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
383 if (!do_print(*MARK, fp))
392 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
395 if (IoFLAGS(io) & IOf_FLUSH)
396 if (PerlIO_flush(fp) == EOF)
419 if (SvTYPE(av) != SVt_PVAV)
420 DIE("Not an ARRAY reference");
421 if (op->op_private & OPpLVAL_INTRO)
422 av = (AV*)save_svref((SV**)sv);
423 if (op->op_flags & OPf_REF) {
429 if (SvTYPE(sv) == SVt_PVAV) {
431 if (op->op_flags & OPf_REF) {
439 if (SvTYPE(sv) != SVt_PVGV) {
442 if (SvGMAGICAL(sv)) {
448 if (op->op_flags & OPf_REF ||
449 op->op_private & HINT_STRICT_REFS)
450 DIE(no_usym, "an ARRAY");
451 if (GIMME == G_ARRAY)
456 if (op->op_private & HINT_STRICT_REFS)
457 DIE(no_symref, sym, "an ARRAY");
458 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
463 if (op->op_private & OPpLVAL_INTRO)
465 if (op->op_flags & OPf_REF) {
472 if (GIMME == G_ARRAY) {
473 I32 maxarg = AvFILL(av) + 1;
475 Copy(AvARRAY(av), SP+1, maxarg, SV*);
480 I32 maxarg = AvFILL(av) + 1;
496 if (SvTYPE(hv) != SVt_PVHV)
497 DIE("Not a HASH reference");
498 if (op->op_private & OPpLVAL_INTRO)
499 hv = (HV*)save_svref((SV**)sv);
500 if (op->op_flags & OPf_REF) {
506 if (SvTYPE(sv) == SVt_PVHV) {
508 if (op->op_flags & OPf_REF) {
516 if (SvTYPE(sv) != SVt_PVGV) {
519 if (SvGMAGICAL(sv)) {
525 if (op->op_flags & OPf_REF ||
526 op->op_private & HINT_STRICT_REFS)
527 DIE(no_usym, "a HASH");
528 if (GIMME == G_ARRAY) {
535 if (op->op_private & HINT_STRICT_REFS)
536 DIE(no_symref, sym, "a HASH");
537 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
542 if (op->op_private & OPpLVAL_INTRO)
544 if (op->op_flags & OPf_REF) {
551 if (GIMME == G_ARRAY) { /* array wanted */
558 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
571 SV **lastlelem = stack_sp;
572 SV **lastrelem = stack_base + POPMARK;
573 SV **firstrelem = stack_base + POPMARK + 1;
574 SV **firstlelem = lastrelem + 1;
586 delaymagic = DM_DELAY; /* catch simultaneous items */
588 /* If there's a common identifier on both sides we have to take
589 * special care that assigning the identifier on the left doesn't
590 * clobber a value on the right that's used later in the list.
592 if (op->op_private & OPpASSIGN_COMMON) {
593 for (relem = firstrelem; relem <= lastrelem; relem++) {
596 *relem = sv_mortalcopy(sv);
604 while (lelem <= lastlelem) {
605 tainted = 0; /* Each item stands on its own, taintwise. */
607 switch (SvTYPE(sv)) {
610 magic = SvMAGICAL(ary) != 0;
614 while (relem <= lastrelem) { /* gobble up all the rest */
619 (void)av_store(ary,i++,sv);
629 magic = SvMAGICAL(hash) != 0;
632 while (relem < lastrelem) { /* gobble up all the rest */
637 sv = &sv_no, relem++;
638 tmpstr = NEWSV(29,0);
640 sv_setsv(tmpstr,*relem); /* value */
642 (void)hv_store_ent(hash,sv,tmpstr,0);
647 if (relem == lastrelem)
648 warn("Odd number of elements in hash list");
652 if (SvTHINKFIRST(sv)) {
653 if (SvREADONLY(sv) && curcop != &compiling) {
654 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
656 if (relem <= lastrelem)
663 if (relem <= lastrelem) {
664 sv_setsv(sv, *relem);
668 sv_setsv(sv, &sv_undef);
673 if (delaymagic & ~DM_DELAY) {
674 if (delaymagic & DM_UID) {
676 (void)setresuid(uid,euid,(Uid_t)-1);
679 (void)setreuid(uid,euid);
682 if ((delaymagic & DM_UID) == DM_RUID) {
684 delaymagic &= ~DM_RUID;
686 # endif /* HAS_SETRUID */
688 if ((delaymagic & DM_UID) == DM_EUID) {
690 delaymagic &= ~DM_EUID;
692 # endif /* HAS_SETEUID */
693 if (delaymagic & DM_UID) {
695 DIE("No setreuid available");
698 # endif /* HAS_SETREUID */
699 #endif /* HAS_SETRESUID */
701 euid = (int)geteuid();
703 if (delaymagic & DM_GID) {
705 (void)setresgid(gid,egid,(Gid_t)-1);
708 (void)setregid(gid,egid);
711 if ((delaymagic & DM_GID) == DM_RGID) {
713 delaymagic &= ~DM_RGID;
715 # endif /* HAS_SETRGID */
717 if ((delaymagic & DM_GID) == DM_EGID) {
719 delaymagic &= ~DM_EGID;
721 # endif /* HAS_SETEGID */
722 if (delaymagic & DM_GID) {
724 DIE("No setregid available");
727 # endif /* HAS_SETREGID */
728 #endif /* HAS_SETRESGID */
730 egid = (int)getegid();
732 tainting |= (uid && (euid != uid || egid != gid));
735 if (GIMME == G_ARRAY) {
739 SP = firstrelem + (lastlelem - firstlelem);
746 SETi(lastrelem - firstrelem + 1);
754 register PMOP *pm = cPMOP;
761 register REGEXP *rx = pm->op_pmregexp;
765 I32 oldsave = savestack_ix;
767 if (op->op_flags & OPf_STACKED)
776 DIE("panic: do_match");
778 if (pm->op_pmflags & PMf_USED) {
779 if (gimme == G_ARRAY)
784 if (!rx->prelen && curpm) {
786 rx = pm->op_pmregexp;
789 if (global = pm->op_pmflags & PMf_GLOBAL) {
791 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
792 MAGIC* mg = mg_find(TARG, 'g');
793 if (mg && mg->mg_len >= 0) {
794 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
795 minmatch = (mg->mg_flags & MGf_MINMATCH);
799 if (!rx->nparens && !global)
800 gimme = G_SCALAR; /* accidental array context? */
801 safebase = (gimme == G_ARRAY) || global;
802 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
804 multiline = pm->op_pmflags & PMf_MULTILINE;
808 if (global && rx->startp[0]) {
812 minmatch = (s == rx->startp[0]);
814 if (pm->op_pmshort) {
815 if (pm->op_pmflags & PMf_SCANFIRST) {
816 if (SvSCREAM(TARG)) {
817 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
819 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
821 else if (pm->op_pmflags & PMf_ALL)
824 else if (!(s = fbm_instr((unsigned char*)s,
825 (unsigned char*)strend, pm->op_pmshort)))
827 else if (pm->op_pmflags & PMf_ALL)
829 if (s && rx->regback >= 0) {
830 ++BmUSEFUL(pm->op_pmshort);
838 else if (!multiline) {
839 if (*SvPVX(pm->op_pmshort) != *s ||
840 memcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
841 if (pm->op_pmflags & PMf_FOLD) {
842 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
849 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
850 SvREFCNT_dec(pm->op_pmshort);
851 pm->op_pmshort = Nullsv; /* opt is being useless */
854 if (pregexec(rx, s, strend, truebase, minmatch,
855 SvSCREAM(TARG) ? TARG : Nullsv,
858 if (pm->op_pmflags & PMf_ONCE)
859 pm->op_pmflags |= PMf_USED;
867 if (gimme == G_ARRAY) {
871 if (global && !iters)
875 EXTEND(SP, iters + i);
876 for (i = !i; i <= iters; i++) {
877 PUSHs(sv_newmortal());
879 if ((s = rx->startp[i]) && rx->endp[i] ) {
880 len = rx->endp[i] - s;
881 sv_setpvn(*SP, s, len);
885 truebase = rx->subbeg;
886 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
890 LEAVE_SCOPE(oldsave);
896 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
897 mg = mg_find(TARG, 'g');
899 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
900 mg = mg_find(TARG, 'g');
903 mg->mg_len = rx->endp[0] - truebase;
904 if (rx->startp[0] == rx->endp[0])
905 mg->mg_flags |= MGf_MINMATCH;
907 mg->mg_flags &= ~MGf_MINMATCH;
912 LEAVE_SCOPE(oldsave);
917 ++BmUSEFUL(pm->op_pmshort);
919 if (pm->op_pmflags & PMf_ONCE)
920 pm->op_pmflags |= PMf_USED;
922 rx->subbeg = truebase;
925 rx->endp[0] = s + SvCUR(pm->op_pmshort);
932 Safefree(rx->subbase);
933 tmps = rx->subbase = savepvn(t, strend-t);
935 rx->subend = tmps + (strend-t);
936 tmps = rx->startp[0] = tmps + (s - t);
937 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
939 LEAVE_SCOPE(oldsave);
944 ++BmUSEFUL(pm->op_pmshort);
948 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
949 MAGIC* mg = mg_find(TARG, 'g');
954 LEAVE_SCOPE(oldsave);
955 if (gimme == G_ARRAY)
968 register IO *io = GvIO(last_in_gv);
969 register I32 type = op->op_type;
972 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
977 perl_call_method("READLINE", GIMME);
980 if (GIMME == G_SCALAR) sv_setsv(TARG, TOPs);
987 if (IoFLAGS(io) & IOf_ARGV) {
988 if (IoFLAGS(io) & IOf_START) {
989 IoFLAGS(io) &= ~IOf_START;
991 if (av_len(GvAVn(last_in_gv)) < 0) {
992 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
993 av_push(GvAVn(last_in_gv), tmpstr);
996 fp = nextargv(last_in_gv);
997 if (!fp) { /* Note: fp != IoIFP(io) */
998 (void)do_close(last_in_gv, FALSE); /* now it does*/
999 IoFLAGS(io) |= IOf_START;
1002 else if (type == OP_GLOB) {
1003 SV *tmpcmd = NEWSV(55, 0);
1007 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1008 /* since spawning off a process is a real performance hit */
1010 #include <descrip.h>
1011 #include <lib$routines.h>
1014 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1015 char vmsspec[NAM$C_MAXRSS+1];
1016 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1017 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1018 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1021 struct dsc$descriptor_s wilddsc
1022 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1023 struct dsc$descriptor_vs rsdsc
1024 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1025 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1027 /* We could find out if there's an explicit dev/dir or version
1028 by peeking into lib$find_file's internal context at
1029 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1030 but that's unsupported, so I don't want to do it now and
1031 have it bite someone in the future. */
1032 strcat(tmpfnam,tmpnam(NULL));
1033 cp = SvPV(tmpglob,i);
1035 if (cp[i] == ';') hasver = 1;
1037 if (sts) hasver = 1;
1041 hasdir = isunix = 1;
1044 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1049 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1050 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1051 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1052 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1053 &dfltdsc,NULL,NULL,NULL))&1)) {
1054 end = rstr + (unsigned long int) *rslt;
1055 if (!hasver) while (*end != ';') end--;
1056 *(end++) = '\n'; *end = '\0';
1057 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1059 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1064 while (*(--begin) != ']' && *begin != '>') ;
1067 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1069 if (cxt) (void)lib$find_file_end(&cxt);
1070 if (ok && sts != RMS$_NMF &&
1071 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1074 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1076 PerlIO_close(tmpfp);
1080 PerlIO_rewind(tmpfp);
1082 IoIFP(io) = fp = tmpfp;
1089 sv_setpv(tmpcmd, "for a in ");
1090 sv_catsv(tmpcmd, tmpglob);
1091 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1093 sv_setpv(tmpcmd, "perlglob ");
1094 sv_catsv(tmpcmd, tmpglob);
1095 sv_catpv(tmpcmd, " |");
1099 sv_setpvn(tmpcmd, cshname, cshlen);
1100 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1101 sv_catsv(tmpcmd, tmpglob);
1102 sv_catpv(tmpcmd, "' 2>/dev/null |");
1104 sv_setpv(tmpcmd, "echo ");
1105 sv_catsv(tmpcmd, tmpglob);
1107 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1109 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1112 #endif /* !DOSISH */
1113 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1114 FALSE, 0, 0, Nullfp);
1120 else if (type == OP_GLOB)
1124 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1125 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1126 if (GIMME == G_SCALAR) {
1127 (void)SvOK_off(TARG);
1132 if (GIMME == G_ARRAY) {
1133 sv = sv_2mortal(NEWSV(57, 80));
1138 (void)SvUPGRADE(sv, SVt_PV);
1139 tmplen = SvLEN(sv); /* remember if already alloced */
1141 Sv_Grow(sv, 80); /* try short-buffering it */
1142 if (type == OP_RCATLINE)
1148 if (!sv_gets(sv, fp, offset)) {
1149 PerlIO_clearerr(fp);
1150 if (IoFLAGS(io) & IOf_ARGV) {
1151 fp = nextargv(last_in_gv);
1154 (void)do_close(last_in_gv, FALSE);
1155 IoFLAGS(io) |= IOf_START;
1157 else if (type == OP_GLOB) {
1158 (void)do_close(last_in_gv, FALSE);
1160 if (GIMME == G_SCALAR) {
1161 (void)SvOK_off(TARG);
1170 SvTAINT(sv); /* Anything from the outside world...*/
1172 if (type == OP_GLOB) {
1175 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1176 tmps = SvEND(sv) - 1;
1177 if (*tmps == *SvPVX(rs)) {
1182 for (tmps = SvPVX(sv); *tmps; tmps++)
1183 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1184 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1186 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1187 (void)POPs; /* Unmatched wildcard? Chuck it... */
1191 if (GIMME == G_ARRAY) {
1192 if (SvLEN(sv) - SvCUR(sv) > 20) {
1193 SvLEN_set(sv, SvCUR(sv)+1);
1194 Renew(SvPVX(sv), SvLEN(sv), char);
1196 sv = sv_2mortal(NEWSV(58, 80));
1199 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1200 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1204 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1205 Renew(SvPVX(sv), SvLEN(sv), char);
1214 register CONTEXT *cx;
1218 * We don't just use the GIMME macro here because it assumes there's
1219 * already a context, which ain't necessarily so at initial startup.
1222 if (op->op_flags & OPf_KNOW)
1223 gimme = op->op_flags & OPf_LIST;
1224 else if (cxstack_ix >= 0)
1225 gimme = cxstack[cxstack_ix].blk_gimme;
1232 PUSHBLOCK(cx, CXt_BLOCK, sp);
1243 I32 lval = op->op_flags & OPf_MOD;
1245 if (SvTYPE(hv) != SVt_PVHV)
1247 he = hv_fetch_ent(hv, keysv, lval, 0);
1249 if (!he || HeVAL(he) == &sv_undef)
1250 DIE(no_helem, SvPV(keysv, na));
1251 if (op->op_private & OPpLVAL_INTRO)
1252 save_svref(&HeVAL(he));
1253 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1254 provide_ref(op, HeVAL(he));
1256 PUSHs(he ? HeVAL(he) : &sv_undef);
1263 register CONTEXT *cx;
1269 if (op->op_flags & OPf_SPECIAL) {
1270 cx = &cxstack[cxstack_ix];
1271 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1276 if (op->op_flags & OPf_KNOW)
1277 gimme = op->op_flags & OPf_LIST;
1278 else if (cxstack_ix >= 0)
1279 gimme = cxstack[cxstack_ix].blk_gimme;
1283 if (gimme == G_SCALAR) {
1284 if (op->op_private & OPpLEAVE_VOID)
1289 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1292 *MARK = sv_mortalcopy(TOPs);
1301 for (mark = newsp + 1; mark <= SP; mark++)
1302 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1303 *mark = sv_mortalcopy(*mark);
1304 /* in case LEAVE wipes old return values */
1306 curpm = newpm; /* Don't pop $1 et al till now */
1316 register CONTEXT *cx;
1321 cx = &cxstack[cxstack_ix];
1322 if (cx->cx_type != CXt_LOOP)
1323 DIE("panic: pp_iter");
1324 av = cx->blk_loop.iterary;
1325 if (av == curstack && cx->blk_loop.iterix >= cx->blk_oldsp)
1328 if (cx->blk_loop.iterix >= AvFILL(av))
1331 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1333 *cx->blk_loop.itervar = sv;
1336 *cx->blk_loop.itervar = &sv_undef;
1344 register PMOP *pm = cPMOP;
1359 register REGEXP *rx = pm->op_pmregexp;
1361 int force_on_match = 0;
1362 I32 oldsave = savestack_ix;
1364 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1366 if (op->op_flags & OPf_STACKED)
1372 s = SvPV(TARG, len);
1373 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1378 DIE("panic: do_subst");
1381 maxiters = (strend - s) + 10;
1383 if (!rx->prelen && curpm) {
1385 rx = pm->op_pmregexp;
1387 safebase = ((!rx || !rx->nparens) && !sawampersand);
1388 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1390 multiline = pm->op_pmflags & PMf_MULTILINE;
1393 if (pm->op_pmshort) {
1394 if (pm->op_pmflags & PMf_SCANFIRST) {
1395 if (SvSCREAM(TARG)) {
1396 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1398 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1401 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1404 if (s && rx->regback >= 0) {
1405 ++BmUSEFUL(pm->op_pmshort);
1413 else if (!multiline) {
1414 if (*SvPVX(pm->op_pmshort) != *s ||
1415 memcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1416 if (pm->op_pmflags & PMf_FOLD) {
1417 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1424 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1425 SvREFCNT_dec(pm->op_pmshort);
1426 pm->op_pmshort = Nullsv; /* opt is being useless */
1429 once = !(rpm->op_pmflags & PMf_GLOBAL);
1430 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1431 c = SvPV(dstr, clen);
1432 if (clen <= rx->minlen) {
1433 /* can do inplace substitution */
1434 if (pregexec(rx, s, strend, orig, 0,
1435 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1436 if (force_on_match) {
1438 s = SvPV_force(TARG, len);
1441 if (rx->subbase) /* oops, no we can't */
1445 SvSCREAM_off(TARG); /* disable possible screamer */
1450 if (m - s > strend - d) { /* faster to shorten from end */
1452 Copy(c, m, clen, char);
1457 Move(d, m, i, char);
1461 SvCUR_set(TARG, m - s);
1462 (void)SvPOK_only(TARG);
1465 LEAVE_SCOPE(oldsave);
1469 else if (i = m - s) { /* faster from front */
1477 Copy(c, m, clen, char);
1478 (void)SvPOK_only(TARG);
1481 LEAVE_SCOPE(oldsave);
1487 Copy(c, d, clen, char);
1488 (void)SvPOK_only(TARG);
1491 LEAVE_SCOPE(oldsave);
1496 (void)SvPOK_only(TARG);
1499 LEAVE_SCOPE(oldsave);
1505 if (iters++ > maxiters)
1506 DIE("Substitution loop");
1511 Move(s, d, i, char);
1515 Copy(c, d, clen, char);
1519 } while (pregexec(rx, s, strend, orig, s == m,
1520 Nullsv, TRUE)); /* (don't match same null twice) */
1523 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1524 Move(s, d, i+1, char); /* include the Null */
1526 (void)SvPOK_only(TARG);
1528 PUSHs(sv_2mortal(newSViv((I32)iters)));
1529 LEAVE_SCOPE(oldsave);
1533 LEAVE_SCOPE(oldsave);
1539 if (pregexec(rx, s, strend, orig, 0,
1540 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1542 if (force_on_match) {
1544 s = SvPV_force(TARG, len);
1547 dstr = NEWSV(25, sv_len(TARG));
1548 sv_setpvn(dstr, m, s-m);
1551 register CONTEXT *cx;
1553 RETURNOP(cPMOP->op_pmreplroot);
1556 if (iters++ > maxiters)
1557 DIE("Substitution loop");
1558 if (rx->subbase && rx->subbase != orig) {
1563 strend = s + (strend - m);
1566 sv_catpvn(dstr, s, m-s);
1569 sv_catpvn(dstr, c, clen);
1572 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1574 sv_catpvn(dstr, s, strend - s);
1576 (void)SvOOK_off(TARG);
1577 Safefree(SvPVX(TARG));
1578 SvPVX(TARG) = SvPVX(dstr);
1579 SvCUR_set(TARG, SvCUR(dstr));
1580 SvLEN_set(TARG, SvLEN(dstr));
1584 (void)SvPOK_only(TARG);
1586 PUSHs(sv_2mortal(newSViv((I32)iters)));
1587 LEAVE_SCOPE(oldsave);
1591 LEAVE_SCOPE(oldsave);
1595 ++BmUSEFUL(pm->op_pmshort);
1597 LEAVE_SCOPE(oldsave);
1606 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1608 LEAVE; /* exit inner scope */
1611 if (stack_base + *markstack_ptr > sp) {
1614 LEAVE; /* exit outer scope */
1615 (void)POPMARK; /* pop src */
1616 items = --*markstack_ptr - markstack_ptr[-1];
1617 (void)POPMARK; /* pop dst */
1618 SP = stack_base + POPMARK; /* pop original mark */
1619 if (GIMME != G_ARRAY) {
1630 ENTER; /* enter inner scope */
1633 src = stack_base[*markstack_ptr];
1637 RETURNOP(cLOGOP->op_other);
1648 register CONTEXT *cx;
1653 if (gimme == G_SCALAR) {
1656 if (SvFLAGS(TOPs) & SVs_TEMP)
1659 *MARK = sv_mortalcopy(TOPs);
1667 for (mark = newsp + 1; mark <= SP; mark++)
1668 if (!(SvFLAGS(*mark) & SVs_TEMP))
1669 *mark = sv_mortalcopy(*mark);
1670 /* in case LEAVE wipes old return values */
1673 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1674 AV* av = cx->blk_sub.argarray;
1679 curpm = newpm; /* Don't pop $1 et al till now */
1683 return pop_return();
1692 register CONTEXT *cx;
1694 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1697 DIE("Not a CODE reference");
1698 switch (SvTYPE(sv)) {
1703 if (sv == &sv_yes) /* unfound import, ignore */
1706 DIE(no_usym, "a subroutine");
1708 if (op->op_private & HINT_STRICT_REFS)
1709 DIE(no_symref, sym, "a subroutine");
1710 cv = perl_get_cv(sym, TRUE);
1714 if (SvTYPE(cv) == SVt_PVCV)
1719 DIE("Not a CODE reference");
1724 if (!(cv = GvCV((GV*)sv)))
1725 cv = sv_2cv(sv, &stash, &gv, TRUE);
1734 DIE("Not a CODE reference");
1736 if (!CvROOT(cv) && !CvXSUB(cv)) {
1737 if (gv = CvGV(cv)) {
1740 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1742 if (SvTYPE(sv) == SVt_PVGV) {
1743 SvREFCNT_dec(GvCV((GV*)sv));
1744 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1748 tmpstr = sv_newmortal();
1749 gv_efullname(tmpstr, gv, Nullch);
1750 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1751 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1753 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1755 sv_unmagic(GvSV(CvGV(cv)), 't');
1759 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1761 DIE("Undefined subroutine called");
1765 if ((op->op_private & OPpENTERSUB_DB)) {
1769 if ( CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)
1770 || strEQ(GvNAME(gv), "END") ) {
1771 /* GV is potentially non-unique */
1772 sv_setsv(sv, newRV((SV*)cv));
1775 gv_efullname(sv, gv, Nullch);
1778 if (CvXSUB(cv)) curcopdb = curcop;
1780 DIE("No DBsub routine");
1784 if (CvOLDSTYLE(cv)) {
1785 I32 (*fp3)_((int,int,int));
1787 register I32 items = SP - MARK;
1788 /* We dont worry to copy from @_. */
1793 stack_sp = mark + 1;
1794 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1795 items = (*fp3)(CvXSUBANY(cv).any_i32,
1796 MARK - stack_base + 1,
1798 stack_sp = stack_base + items;
1801 I32 markix = TOPMARK;
1806 /* Need to copy @_ to stack. Alternative may be to
1807 * switch stack to @_, and copy return values
1808 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1809 AV* av = GvAV(defgv);
1810 I32 items = AvFILL(av) + 1;
1813 /* Mark is at the end of the stack. */
1815 Copy(AvARRAY(av), sp + 1, items, SV*);
1820 if (curcopdb) { /* We assume that the first
1821 XSUB in &DB::sub is the
1827 /* Do we need to open block here? XXXX */
1828 (void)(*CvXSUB(cv))(cv);
1830 /* Enforce some sanity in scalar context. */
1831 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1832 if (markix > stack_sp - stack_base)
1833 *(stack_base + markix) = &sv_undef;
1835 *(stack_base + markix) = *stack_sp;
1836 stack_sp = stack_base + markix;
1844 register I32 items = SP - MARK;
1845 AV* padlist = CvPADLIST(cv);
1846 SV** svp = AvARRAY(padlist);
1847 push_return(op->op_next);
1848 PUSHBLOCK(cx, CXt_SUB, MARK);
1851 if (CvDEPTH(cv) < 2)
1852 (void)SvREFCNT_inc(cv);
1853 else { /* save temporaries on recursion? */
1854 if (CvDEPTH(cv) == 100 && dowarn)
1855 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1856 if (CvDEPTH(cv) > AvFILL(padlist)) {
1858 AV *newpad = newAV();
1859 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1860 I32 ix = AvFILL((AV*)svp[1]);
1861 svp = AvARRAY(svp[0]);
1862 for ( ;ix > 0; ix--) {
1863 if (svp[ix] != &sv_undef) {
1864 char *name = SvPVX(svp[ix]);
1865 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1866 av_store(newpad, ix,
1867 SvREFCNT_inc(oldpad[ix]) );
1869 else { /* our own lexical */
1871 av_store(newpad, ix, sv = (SV*)newAV());
1872 else if (*name == '%')
1873 av_store(newpad, ix, sv = (SV*)newHV());
1875 av_store(newpad, ix, sv = NEWSV(0,0));
1880 av_store(newpad, ix, sv = NEWSV(0,0));
1884 av = newAV(); /* will be @_ */
1886 av_store(newpad, 0, (SV*)av);
1887 AvFLAGS(av) = AVf_REIFY;
1888 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1889 AvFILL(padlist) = CvDEPTH(cv);
1890 svp = AvARRAY(padlist);
1894 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1896 AV* av = (AV*)curpad[0];
1903 cx->blk_sub.savearray = GvAV(defgv);
1904 cx->blk_sub.argarray = av;
1905 GvAV(defgv) = cx->blk_sub.argarray;
1908 if (items > AvMAX(av) + 1) {
1910 if (AvARRAY(av) != ary) {
1911 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1912 SvPVX(av) = (char*)ary;
1914 if (items > AvMAX(av) + 1) {
1915 AvMAX(av) = items - 1;
1916 Renew(ary,items,SV*);
1918 SvPVX(av) = (char*)ary;
1921 Copy(MARK,AvARRAY(av),items,SV*);
1922 AvFILL(av) = items - 1;
1930 RETURNOP(CvSTART(cv));
1940 I32 lval = op->op_flags & OPf_MOD;
1943 elem -= curcop->cop_arybase;
1944 if (SvTYPE(av) != SVt_PVAV)
1946 svp = av_fetch(av, elem, lval);
1948 if (!svp || *svp == &sv_undef)
1949 DIE(no_aelem, elem);
1950 if (op->op_private & OPpLVAL_INTRO)
1952 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1953 provide_ref(op, *svp);
1955 PUSHs(svp ? *svp : &sv_undef);
1969 (void)SvUPGRADE(sv, SVt_RV);
1970 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1971 (SV*)newHV() : (SV*)newAV());
1986 sv = *(stack_base + TOPMARK + 1);
1999 !(packname = SvPV(sv, packlen)) ||
2000 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2001 !(ob=(SV*)GvIO(iogv)))
2003 char *name = SvPV(nm, na);
2005 if (!packname || !isALPHA(*packname))
2006 DIE("Can't call method \"%s\" without a package or object reference", name);
2007 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2008 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2009 stash = gv_stashpvn(packname, packlen, TRUE);
2011 DIE("Can't call method \"%s\" in empty package \"%s\"",
2014 gv = gv_fetchmethod(stash,name);
2016 DIE("Can't locate object method \"%s\" via package \"%s\"",
2021 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2024 if (!ob || !SvOBJECT(ob)) {
2025 char *name = SvPV(nm, na);
2026 DIE("Can't call method \"%s\" on unblessed reference", name);
2029 if (!gv) { /* nothing cached */
2030 char *name = SvPV(nm, na);
2031 gv = gv_fetchmethod(SvSTASH(ob),name);
2033 DIE("Can't locate object method \"%s\" via package \"%s\"",
2034 name, HvNAME(SvSTASH(ob)));