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 && !SvTAINTED(left))
159 SvSetSV(right, left);
169 RETURNOP(cCONDOP->op_true);
171 RETURNOP(cCONDOP->op_false);
177 TAINT_NOT; /* Each statement is presumed innocent */
178 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
180 oldsave = scopestack[scopestack_ix - 1];
181 LEAVE_SCOPE(oldsave);
187 dSP; tryAMAGICbinSET(seq,0);
190 bool eq = ((op->op_private & OPpLOCALE)
191 ? (sv_cmp_locale(left, right) == 0)
192 : sv_eq(left, right));
193 SETs( eq ? &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);
254 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
255 SvIVX(TOPs) != IV_MAX)
258 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
273 RETURNOP(cLOGOP->op_other);
279 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
282 SETn( left + right );
290 AV *av = GvAV((GV*)cSVOP->op_sv);
291 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
292 PUSHs(svp ? *svp : &sv_undef);
300 do_join(TARG, *MARK, MARK, SP);
313 /* Oversized hot code. */
317 dSP; dMARK; dORIGMARK;
323 if (op->op_flags & OPf_STACKED)
327 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
333 perl_call_method("PRINT", G_SCALAR);
341 if (!(io = GvIO(gv))) {
343 SV* sv = sv_newmortal();
344 gv_fullname3(sv, gv, Nullch);
345 warn("Filehandle %s never opened", SvPV(sv,na));
348 SETERRNO(EBADF,RMS$_IFI);
351 else if (!(fp = IoOFP(io))) {
353 SV* sv = sv_newmortal();
354 gv_fullname3(sv, gv, Nullch);
356 warn("Filehandle %s opened only for input", SvPV(sv,na));
358 warn("print on closed filehandle %s", SvPV(sv,na));
360 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
367 if (!do_print(*MARK, fp))
371 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
380 if (!do_print(*MARK, fp))
389 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
392 if (IoFLAGS(io) & IOf_FLUSH)
393 if (PerlIO_flush(fp) == EOF)
416 if (SvTYPE(av) != SVt_PVAV)
417 DIE("Not an ARRAY reference");
418 if (op->op_private & OPpLVAL_INTRO)
419 av = (AV*)save_svref((SV**)sv);
420 if (op->op_flags & OPf_REF) {
426 if (SvTYPE(sv) == SVt_PVAV) {
428 if (op->op_flags & OPf_REF) {
436 if (SvTYPE(sv) != SVt_PVGV) {
439 if (SvGMAGICAL(sv)) {
445 if (op->op_flags & OPf_REF ||
446 op->op_private & HINT_STRICT_REFS)
447 DIE(no_usym, "an ARRAY");
448 if (GIMME == G_ARRAY)
453 if (op->op_private & HINT_STRICT_REFS)
454 DIE(no_symref, sym, "an ARRAY");
455 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
460 if (op->op_private & OPpLVAL_INTRO)
462 if (op->op_flags & OPf_REF) {
469 if (GIMME == G_ARRAY) {
470 I32 maxarg = AvFILL(av) + 1;
472 Copy(AvARRAY(av), SP+1, maxarg, SV*);
477 I32 maxarg = AvFILL(av) + 1;
493 if (SvTYPE(hv) != SVt_PVHV)
494 DIE("Not a HASH reference");
495 if (op->op_private & OPpLVAL_INTRO)
496 hv = (HV*)save_svref((SV**)sv);
497 if (op->op_flags & OPf_REF) {
503 if (SvTYPE(sv) == SVt_PVHV) {
505 if (op->op_flags & OPf_REF) {
513 if (SvTYPE(sv) != SVt_PVGV) {
516 if (SvGMAGICAL(sv)) {
522 if (op->op_flags & OPf_REF ||
523 op->op_private & HINT_STRICT_REFS)
524 DIE(no_usym, "a HASH");
525 if (GIMME == G_ARRAY) {
532 if (op->op_private & HINT_STRICT_REFS)
533 DIE(no_symref, sym, "a HASH");
534 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
539 if (op->op_private & OPpLVAL_INTRO)
541 if (op->op_flags & OPf_REF) {
548 if (GIMME == G_ARRAY) { /* array wanted */
555 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
568 SV **lastlelem = stack_sp;
569 SV **lastrelem = stack_base + POPMARK;
570 SV **firstrelem = stack_base + POPMARK + 1;
571 SV **firstlelem = lastrelem + 1;
583 delaymagic = DM_DELAY; /* catch simultaneous items */
585 /* If there's a common identifier on both sides we have to take
586 * special care that assigning the identifier on the left doesn't
587 * clobber a value on the right that's used later in the list.
589 if (op->op_private & OPpASSIGN_COMMON) {
590 for (relem = firstrelem; relem <= lastrelem; relem++) {
593 *relem = sv_mortalcopy(sv);
601 while (lelem <= lastlelem) {
602 TAINT_NOT; /* Each item stands on its own, taintwise. */
604 switch (SvTYPE(sv)) {
607 magic = SvMAGICAL(ary) != 0;
611 while (relem <= lastrelem) { /* gobble up all the rest */
616 (void)av_store(ary,i++,sv);
626 magic = SvMAGICAL(hash) != 0;
629 while (relem < lastrelem) { /* gobble up all the rest */
634 sv = &sv_no, relem++;
635 tmpstr = NEWSV(29,0);
637 sv_setsv(tmpstr,*relem); /* value */
639 (void)hv_store_ent(hash,sv,tmpstr,0);
644 if (relem == lastrelem)
645 warn("Odd number of elements in hash list");
649 if (SvTHINKFIRST(sv)) {
650 if (SvREADONLY(sv) && curcop != &compiling) {
651 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
653 if (relem <= lastrelem)
660 if (relem <= lastrelem) {
661 sv_setsv(sv, *relem);
665 sv_setsv(sv, &sv_undef);
670 if (delaymagic & ~DM_DELAY) {
671 if (delaymagic & DM_UID) {
673 (void)setresuid(uid,euid,(Uid_t)-1);
676 (void)setreuid(uid,euid);
679 if ((delaymagic & DM_UID) == DM_RUID) {
681 delaymagic &= ~DM_RUID;
683 # endif /* HAS_SETRUID */
685 if ((delaymagic & DM_UID) == DM_EUID) {
687 delaymagic &= ~DM_EUID;
689 # endif /* HAS_SETEUID */
690 if (delaymagic & DM_UID) {
692 DIE("No setreuid available");
695 # endif /* HAS_SETREUID */
696 #endif /* HAS_SETRESUID */
698 euid = (int)geteuid();
700 if (delaymagic & DM_GID) {
702 (void)setresgid(gid,egid,(Gid_t)-1);
705 (void)setregid(gid,egid);
708 if ((delaymagic & DM_GID) == DM_RGID) {
710 delaymagic &= ~DM_RGID;
712 # endif /* HAS_SETRGID */
714 if ((delaymagic & DM_GID) == DM_EGID) {
716 delaymagic &= ~DM_EGID;
718 # endif /* HAS_SETEGID */
719 if (delaymagic & DM_GID) {
721 DIE("No setregid available");
724 # endif /* HAS_SETREGID */
725 #endif /* HAS_SETRESGID */
727 egid = (int)getegid();
729 tainting |= (uid && (euid != uid || egid != gid));
732 if (GIMME == G_ARRAY) {
736 SP = firstrelem + (lastlelem - firstlelem);
743 SETi(lastrelem - firstrelem + 1);
751 register PMOP *pm = cPMOP;
758 register REGEXP *rx = pm->op_pmregexp;
762 I32 oldsave = savestack_ix;
764 if (op->op_flags & OPf_STACKED)
773 DIE("panic: do_match");
775 if (pm->op_pmflags & PMf_USED) {
776 if (gimme == G_ARRAY)
781 if (!rx->prelen && curpm) {
783 rx = pm->op_pmregexp;
786 if (global = pm->op_pmflags & PMf_GLOBAL) {
788 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
789 MAGIC* mg = mg_find(TARG, 'g');
790 if (mg && mg->mg_len >= 0) {
791 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
792 minmatch = (mg->mg_flags & MGf_MINMATCH);
796 if (!rx->nparens && !global)
797 gimme = G_SCALAR; /* accidental array context? */
798 safebase = (gimme == G_ARRAY) || global;
799 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
801 multiline = pm->op_pmflags & PMf_MULTILINE;
805 if (global && rx->startp[0]) {
809 minmatch = (s == rx->startp[0]);
811 if (pm->op_pmshort) {
812 if (pm->op_pmflags & PMf_SCANFIRST) {
813 if (SvSCREAM(TARG)) {
814 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
816 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
818 else if (pm->op_pmflags & PMf_ALL)
821 else if (!(s = fbm_instr((unsigned char*)s,
822 (unsigned char*)strend, pm->op_pmshort)))
824 else if (pm->op_pmflags & PMf_ALL)
826 if (s && rx->regback >= 0) {
827 ++BmUSEFUL(pm->op_pmshort);
835 else if (!multiline) {
836 if (*SvPVX(pm->op_pmshort) != *s
837 || (pm->op_pmslen > 1
838 && memcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
841 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
842 SvREFCNT_dec(pm->op_pmshort);
843 pm->op_pmshort = Nullsv; /* opt is being useless */
846 if (pregexec(rx, s, strend, truebase, minmatch,
847 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
850 if (pm->op_pmflags & PMf_ONCE)
851 pm->op_pmflags |= PMf_USED;
859 if (gimme == G_ARRAY) {
862 TAINT_IF(rx->exec_tainted);
864 if (global && !iters)
868 EXTEND(SP, iters + i);
869 EXTEND_MORTAL(iters + i);
870 for (i = !i; i <= iters; i++) {
871 PUSHs(sv_newmortal());
873 if ((s = rx->startp[i]) && rx->endp[i] ) {
874 len = rx->endp[i] - s;
875 sv_setpvn(*SP, s, len);
879 truebase = rx->subbeg;
880 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
884 LEAVE_SCOPE(oldsave);
890 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
891 mg = mg_find(TARG, 'g');
893 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
894 mg = mg_find(TARG, 'g');
897 mg->mg_len = rx->endp[0] - truebase;
898 if (rx->startp[0] == rx->endp[0])
899 mg->mg_flags |= MGf_MINMATCH;
901 mg->mg_flags &= ~MGf_MINMATCH;
906 LEAVE_SCOPE(oldsave);
911 ++BmUSEFUL(pm->op_pmshort);
913 if (pm->op_pmflags & PMf_ONCE)
914 pm->op_pmflags |= PMf_USED;
916 rx->subbeg = truebase;
919 rx->endp[0] = s + SvCUR(pm->op_pmshort);
926 Safefree(rx->subbase);
927 tmps = rx->subbase = savepvn(t, strend-t);
929 rx->subend = tmps + (strend-t);
930 tmps = rx->startp[0] = tmps + (s - t);
931 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
933 LEAVE_SCOPE(oldsave);
938 ++BmUSEFUL(pm->op_pmshort);
942 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
943 MAGIC* mg = mg_find(TARG, 'g');
948 LEAVE_SCOPE(oldsave);
949 if (gimme == G_ARRAY)
962 register IO *io = GvIO(last_in_gv);
963 register I32 type = op->op_type;
966 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
971 perl_call_method("READLINE", GIMME);
974 if (GIMME == G_SCALAR) sv_setsv(TARG, TOPs);
981 if (IoFLAGS(io) & IOf_ARGV) {
982 if (IoFLAGS(io) & IOf_START) {
983 IoFLAGS(io) &= ~IOf_START;
985 if (av_len(GvAVn(last_in_gv)) < 0) {
986 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
987 av_push(GvAVn(last_in_gv), tmpstr);
990 fp = nextargv(last_in_gv);
991 if (!fp) { /* Note: fp != IoIFP(io) */
992 (void)do_close(last_in_gv, FALSE); /* now it does*/
993 IoFLAGS(io) |= IOf_START;
996 else if (type == OP_GLOB) {
997 SV *tmpcmd = NEWSV(55, 0);
1001 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1002 /* since spawning off a process is a real performance hit */
1004 #include <descrip.h>
1005 #include <lib$routines.h>
1008 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1009 char vmsspec[NAM$C_MAXRSS+1];
1010 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1011 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1012 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1015 struct dsc$descriptor_s wilddsc
1016 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1017 struct dsc$descriptor_vs rsdsc
1018 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1019 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1021 /* We could find out if there's an explicit dev/dir or version
1022 by peeking into lib$find_file's internal context at
1023 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1024 but that's unsupported, so I don't want to do it now and
1025 have it bite someone in the future. */
1026 strcat(tmpfnam,tmpnam(NULL));
1027 cp = SvPV(tmpglob,i);
1029 if (cp[i] == ';') hasver = 1;
1031 if (sts) hasver = 1;
1035 hasdir = isunix = 1;
1038 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1043 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1044 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1045 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1046 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1047 &dfltdsc,NULL,NULL,NULL))&1)) {
1048 end = rstr + (unsigned long int) *rslt;
1049 if (!hasver) while (*end != ';') end--;
1050 *(end++) = '\n'; *end = '\0';
1051 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1053 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1058 while (*(--begin) != ']' && *begin != '>') ;
1061 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1063 if (cxt) (void)lib$find_file_end(&cxt);
1064 if (ok && sts != RMS$_NMF &&
1065 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1068 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1070 PerlIO_close(tmpfp);
1074 PerlIO_rewind(tmpfp);
1076 IoIFP(io) = fp = tmpfp;
1083 sv_setpv(tmpcmd, "for a in ");
1084 sv_catsv(tmpcmd, tmpglob);
1085 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1087 sv_setpv(tmpcmd, "perlglob ");
1088 sv_catsv(tmpcmd, tmpglob);
1089 sv_catpv(tmpcmd, " |");
1093 sv_setpvn(tmpcmd, cshname, cshlen);
1094 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1095 sv_catsv(tmpcmd, tmpglob);
1096 sv_catpv(tmpcmd, "' 2>/dev/null |");
1098 sv_setpv(tmpcmd, "echo ");
1099 sv_catsv(tmpcmd, tmpglob);
1101 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1103 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1106 #endif /* !DOSISH */
1107 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1108 FALSE, 0, 0, Nullfp);
1114 else if (type == OP_GLOB)
1118 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1119 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1120 if (GIMME == G_SCALAR) {
1121 (void)SvOK_off(TARG);
1126 if (GIMME == G_ARRAY) {
1127 sv = sv_2mortal(NEWSV(57, 80));
1132 (void)SvUPGRADE(sv, SVt_PV);
1133 tmplen = SvLEN(sv); /* remember if already alloced */
1135 Sv_Grow(sv, 80); /* try short-buffering it */
1136 if (type == OP_RCATLINE)
1142 if (!sv_gets(sv, fp, offset)) {
1143 PerlIO_clearerr(fp);
1144 if (IoFLAGS(io) & IOf_ARGV) {
1145 fp = nextargv(last_in_gv);
1148 (void)do_close(last_in_gv, FALSE);
1149 IoFLAGS(io) |= IOf_START;
1151 else if (type == OP_GLOB) {
1152 (void)do_close(last_in_gv, FALSE);
1154 if (GIMME == G_SCALAR) {
1155 (void)SvOK_off(TARG);
1160 /* This should not be marked tainted if the fp is marked clean */
1161 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1167 if (type == OP_GLOB) {
1170 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1171 tmps = SvEND(sv) - 1;
1172 if (*tmps == *SvPVX(rs)) {
1177 for (tmps = SvPVX(sv); *tmps; tmps++)
1178 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1179 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1181 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1182 (void)POPs; /* Unmatched wildcard? Chuck it... */
1186 if (GIMME == G_ARRAY) {
1187 if (SvLEN(sv) - SvCUR(sv) > 20) {
1188 SvLEN_set(sv, SvCUR(sv)+1);
1189 Renew(SvPVX(sv), SvLEN(sv), char);
1191 sv = sv_2mortal(NEWSV(58, 80));
1194 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1195 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1199 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1200 Renew(SvPVX(sv), SvLEN(sv), char);
1209 register CONTEXT *cx;
1213 * We don't just use the GIMME macro here because it assumes there's
1214 * already a context, which ain't necessarily so at initial startup.
1217 if (op->op_flags & OPf_KNOW)
1218 gimme = op->op_flags & OPf_LIST;
1219 else if (cxstack_ix >= 0)
1220 gimme = cxstack[cxstack_ix].blk_gimme;
1227 PUSHBLOCK(cx, CXt_BLOCK, sp);
1238 I32 lval = op->op_flags & OPf_MOD;
1240 if (SvTYPE(hv) != SVt_PVHV)
1242 he = hv_fetch_ent(hv, keysv, lval, 0);
1244 if (!he || HeVAL(he) == &sv_undef)
1245 DIE(no_helem, SvPV(keysv, na));
1246 if (op->op_private & OPpLVAL_INTRO)
1247 save_svref(&HeVAL(he));
1248 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1249 provide_ref(op, HeVAL(he));
1251 PUSHs(he ? HeVAL(he) : &sv_undef);
1258 register CONTEXT *cx;
1264 if (op->op_flags & OPf_SPECIAL) {
1265 cx = &cxstack[cxstack_ix];
1266 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1271 if (op->op_flags & OPf_KNOW)
1272 gimme = op->op_flags & OPf_LIST;
1273 else if (cxstack_ix >= 0)
1274 gimme = cxstack[cxstack_ix].blk_gimme;
1278 if (gimme == G_SCALAR) {
1279 if (op->op_private & OPpLEAVE_VOID)
1284 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1287 *MARK = sv_mortalcopy(TOPs);
1296 for (mark = newsp + 1; mark <= SP; mark++)
1297 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1298 *mark = sv_mortalcopy(*mark);
1299 /* in case LEAVE wipes old return values */
1301 curpm = newpm; /* Don't pop $1 et al till now */
1311 register CONTEXT *cx;
1316 cx = &cxstack[cxstack_ix];
1317 if (cx->cx_type != CXt_LOOP)
1318 DIE("panic: pp_iter");
1319 av = cx->blk_loop.iterary;
1320 if (av == curstack && cx->blk_loop.iterix >= cx->blk_oldsp)
1323 if (cx->blk_loop.iterix >= AvFILL(av))
1326 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1328 *cx->blk_loop.itervar = sv;
1331 *cx->blk_loop.itervar = &sv_undef;
1339 register PMOP *pm = cPMOP;
1354 register REGEXP *rx = pm->op_pmregexp;
1356 int force_on_match = 0;
1357 I32 oldsave = savestack_ix;
1359 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1361 if (op->op_flags & OPf_STACKED)
1367 s = SvPV(TARG, len);
1368 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1373 DIE("panic: do_subst");
1376 maxiters = (strend - s) + 10;
1378 if (!rx->prelen && curpm) {
1380 rx = pm->op_pmregexp;
1382 safebase = ((!rx || !rx->nparens) && !sawampersand);
1383 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1385 multiline = pm->op_pmflags & PMf_MULTILINE;
1388 if (pm->op_pmshort) {
1389 if (pm->op_pmflags & PMf_SCANFIRST) {
1390 if (SvSCREAM(TARG)) {
1391 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1393 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1396 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1399 if (s && rx->regback >= 0) {
1400 ++BmUSEFUL(pm->op_pmshort);
1408 else if (!multiline) {
1409 if (*SvPVX(pm->op_pmshort) != *s
1410 || (pm->op_pmslen > 1
1411 && memcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1414 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1415 SvREFCNT_dec(pm->op_pmshort);
1416 pm->op_pmshort = Nullsv; /* opt is being useless */
1419 once = !(rpm->op_pmflags & PMf_GLOBAL);
1420 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1421 c = SvPV(dstr, clen);
1422 if (clen <= rx->minlen) {
1423 /* can do inplace substitution */
1424 if (pregexec(rx, s, strend, orig, 0,
1425 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1426 if (force_on_match) {
1428 s = SvPV_force(TARG, len);
1431 if (rx->subbase) /* oops, no we can't */
1435 SvSCREAM_off(TARG); /* disable possible screamer */
1440 if (m - s > strend - d) { /* faster to shorten from end */
1442 Copy(c, m, clen, char);
1447 Move(d, m, i, char);
1451 SvCUR_set(TARG, m - s);
1452 (void)SvPOK_only(TARG);
1455 LEAVE_SCOPE(oldsave);
1459 else if (i = m - s) { /* faster from front */
1467 Copy(c, m, clen, char);
1468 (void)SvPOK_only(TARG);
1471 LEAVE_SCOPE(oldsave);
1477 Copy(c, d, clen, char);
1478 (void)SvPOK_only(TARG);
1481 LEAVE_SCOPE(oldsave);
1486 (void)SvPOK_only(TARG);
1489 LEAVE_SCOPE(oldsave);
1495 if (iters++ > maxiters)
1496 DIE("Substitution loop");
1501 Move(s, d, i, char);
1505 Copy(c, d, clen, char);
1509 } while (pregexec(rx, s, strend, orig, s == m,
1510 Nullsv, TRUE)); /* (don't match same null twice) */
1513 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1514 Move(s, d, i+1, char); /* include the Null */
1516 (void)SvPOK_only(TARG);
1518 PUSHs(sv_2mortal(newSViv((I32)iters)));
1519 LEAVE_SCOPE(oldsave);
1523 LEAVE_SCOPE(oldsave);
1529 if (pregexec(rx, s, strend, orig, 0,
1530 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1532 if (force_on_match) {
1534 s = SvPV_force(TARG, len);
1537 dstr = NEWSV(25, sv_len(TARG));
1538 sv_setpvn(dstr, m, s-m);
1541 register CONTEXT *cx;
1543 RETURNOP(cPMOP->op_pmreplroot);
1546 if (iters++ > maxiters)
1547 DIE("Substitution loop");
1548 if (rx->subbase && rx->subbase != orig) {
1553 strend = s + (strend - m);
1556 sv_catpvn(dstr, s, m-s);
1559 sv_catpvn(dstr, c, clen);
1562 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1564 sv_catpvn(dstr, s, strend - s);
1566 (void)SvOOK_off(TARG);
1567 Safefree(SvPVX(TARG));
1568 SvPVX(TARG) = SvPVX(dstr);
1569 SvCUR_set(TARG, SvCUR(dstr));
1570 SvLEN_set(TARG, SvLEN(dstr));
1574 (void)SvPOK_only(TARG);
1576 PUSHs(sv_2mortal(newSViv((I32)iters)));
1577 LEAVE_SCOPE(oldsave);
1581 LEAVE_SCOPE(oldsave);
1585 ++BmUSEFUL(pm->op_pmshort);
1587 LEAVE_SCOPE(oldsave);
1596 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1598 LEAVE; /* exit inner scope */
1601 if (stack_base + *markstack_ptr > sp) {
1604 LEAVE; /* exit outer scope */
1605 (void)POPMARK; /* pop src */
1606 items = --*markstack_ptr - markstack_ptr[-1];
1607 (void)POPMARK; /* pop dst */
1608 SP = stack_base + POPMARK; /* pop original mark */
1609 if (GIMME != G_ARRAY) {
1620 ENTER; /* enter inner scope */
1623 src = stack_base[*markstack_ptr];
1627 RETURNOP(cLOGOP->op_other);
1638 register CONTEXT *cx;
1643 if (gimme == G_SCALAR) {
1646 if (SvFLAGS(TOPs) & SVs_TEMP)
1649 *MARK = sv_mortalcopy(TOPs);
1657 for (mark = newsp + 1; mark <= SP; mark++)
1658 if (!(SvFLAGS(*mark) & SVs_TEMP))
1659 *mark = sv_mortalcopy(*mark);
1660 /* in case LEAVE wipes old return values */
1663 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1664 AV* av = cx->blk_sub.argarray;
1669 curpm = newpm; /* Don't pop $1 et al till now */
1673 return pop_return();
1682 register CONTEXT *cx;
1684 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1687 DIE("Not a CODE reference");
1688 switch (SvTYPE(sv)) {
1693 if (sv == &sv_yes) /* unfound import, ignore */
1696 DIE(no_usym, "a subroutine");
1698 if (op->op_private & HINT_STRICT_REFS)
1699 DIE(no_symref, sym, "a subroutine");
1700 cv = perl_get_cv(sym, TRUE);
1704 if (SvTYPE(cv) == SVt_PVCV)
1709 DIE("Not a CODE reference");
1714 if (!(cv = GvCV((GV*)sv)))
1715 cv = sv_2cv(sv, &stash, &gv, TRUE);
1724 DIE("Not a CODE reference");
1726 if (!CvROOT(cv) && !CvXSUB(cv)) {
1727 if (gv = CvGV(cv)) {
1730 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1732 if (SvTYPE(sv) == SVt_PVGV) {
1733 SvREFCNT_dec(GvCV((GV*)sv));
1734 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1738 tmpstr = sv_newmortal();
1739 gv_efullname3(tmpstr, gv, Nullch);
1740 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1741 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1743 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1744 SvTAINTED_off(GvSV(CvGV(cv)));
1748 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1750 DIE("Undefined subroutine called");
1754 if ((op->op_private & OPpENTERSUB_DB)) {
1758 if ( CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)
1759 || strEQ(GvNAME(gv), "END") ) {
1760 /* GV is potentially non-unique */
1761 sv_setsv(sv, newRV((SV*)cv));
1764 gv_efullname3(sv, gv, Nullch);
1767 if (CvXSUB(cv)) curcopdb = curcop;
1769 DIE("No DBsub routine");
1773 if (CvOLDSTYLE(cv)) {
1774 I32 (*fp3)_((int,int,int));
1776 register I32 items = SP - MARK;
1777 /* We dont worry to copy from @_. */
1782 stack_sp = mark + 1;
1783 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1784 items = (*fp3)(CvXSUBANY(cv).any_i32,
1785 MARK - stack_base + 1,
1787 stack_sp = stack_base + items;
1790 I32 markix = TOPMARK;
1795 /* Need to copy @_ to stack. Alternative may be to
1796 * switch stack to @_, and copy return values
1797 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1798 AV* av = GvAV(defgv);
1799 I32 items = AvFILL(av) + 1;
1802 /* Mark is at the end of the stack. */
1804 Copy(AvARRAY(av), sp + 1, items, SV*);
1809 if (curcopdb) { /* We assume that the first
1810 XSUB in &DB::sub is the
1816 /* Do we need to open block here? XXXX */
1817 (void)(*CvXSUB(cv))(cv);
1819 /* Enforce some sanity in scalar context. */
1820 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1821 if (markix > stack_sp - stack_base)
1822 *(stack_base + markix) = &sv_undef;
1824 *(stack_base + markix) = *stack_sp;
1825 stack_sp = stack_base + markix;
1833 register I32 items = SP - MARK;
1834 AV* padlist = CvPADLIST(cv);
1835 SV** svp = AvARRAY(padlist);
1836 push_return(op->op_next);
1837 PUSHBLOCK(cx, CXt_SUB, MARK);
1840 if (CvDEPTH(cv) < 2)
1841 (void)SvREFCNT_inc(cv);
1842 else { /* save temporaries on recursion? */
1843 if (CvDEPTH(cv) == 100 && dowarn)
1844 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1845 if (CvDEPTH(cv) > AvFILL(padlist)) {
1847 AV *newpad = newAV();
1848 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1849 I32 ix = AvFILL((AV*)svp[1]);
1850 svp = AvARRAY(svp[0]);
1851 for ( ;ix > 0; ix--) {
1852 if (svp[ix] != &sv_undef) {
1853 char *name = SvPVX(svp[ix]);
1854 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1855 av_store(newpad, ix,
1856 SvREFCNT_inc(oldpad[ix]) );
1858 else { /* our own lexical */
1860 av_store(newpad, ix, sv = (SV*)newAV());
1861 else if (*name == '%')
1862 av_store(newpad, ix, sv = (SV*)newHV());
1864 av_store(newpad, ix, sv = NEWSV(0,0));
1869 av_store(newpad, ix, sv = NEWSV(0,0));
1873 av = newAV(); /* will be @_ */
1875 av_store(newpad, 0, (SV*)av);
1876 AvFLAGS(av) = AVf_REIFY;
1877 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1878 AvFILL(padlist) = CvDEPTH(cv);
1879 svp = AvARRAY(padlist);
1883 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1885 AV* av = (AV*)curpad[0];
1892 cx->blk_sub.savearray = GvAV(defgv);
1893 cx->blk_sub.argarray = av;
1894 GvAV(defgv) = cx->blk_sub.argarray;
1897 if (items > AvMAX(av) + 1) {
1899 if (AvARRAY(av) != ary) {
1900 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1901 SvPVX(av) = (char*)ary;
1903 if (items > AvMAX(av) + 1) {
1904 AvMAX(av) = items - 1;
1905 Renew(ary,items,SV*);
1907 SvPVX(av) = (char*)ary;
1910 Copy(MARK,AvARRAY(av),items,SV*);
1911 AvFILL(av) = items - 1;
1919 RETURNOP(CvSTART(cv));
1929 I32 lval = op->op_flags & OPf_MOD;
1932 elem -= curcop->cop_arybase;
1933 if (SvTYPE(av) != SVt_PVAV)
1935 svp = av_fetch(av, elem, lval);
1937 if (!svp || *svp == &sv_undef)
1938 DIE(no_aelem, elem);
1939 if (op->op_private & OPpLVAL_INTRO)
1941 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1942 provide_ref(op, *svp);
1944 PUSHs(svp ? *svp : &sv_undef);
1958 (void)SvUPGRADE(sv, SVt_RV);
1959 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1960 (SV*)newHV() : (SV*)newAV());
1975 sv = *(stack_base + TOPMARK + 1);
1988 !(packname = SvPV(sv, packlen)) ||
1989 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1990 !(ob=(SV*)GvIO(iogv)))
1992 char *name = SvPV(nm, na);
1994 if (!packname || !isALPHA(*packname))
1995 DIE("Can't call method \"%s\" without a package or object reference", name);
1996 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
1997 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
1998 stash = gv_stashpvn(packname, packlen, TRUE);
2000 DIE("Can't call method \"%s\" in empty package \"%s\"",
2003 gv = gv_fetchmethod(stash,name);
2005 DIE("Can't locate object method \"%s\" via package \"%s\"",
2010 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2013 if (!ob || !SvOBJECT(ob)) {
2014 char *name = SvPV(nm, na);
2015 DIE("Can't call method \"%s\" on unblessed reference", name);
2018 if (!gv) { /* nothing cached */
2019 char *name = SvPV(nm, na);
2020 gv = gv_fetchmethod(SvSTASH(ob),name);
2022 DIE("Can't locate object method \"%s\" via package \"%s\"",
2023 name, HvNAME(SvSTASH(ob)));