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")) /* XXX deprecate in 5.005 */
104 ref = (SV*)GvIOp(gv);
107 if (strEQ(elem, "GLOB"))
111 if (strEQ(elem, "HASH"))
115 if (strEQ(elem, "IO"))
116 ref = (SV*)GvIOp(gv);
119 if (strEQ(elem, "NAME"))
120 sv = newSVpv(GvNAME(gv), GvNAMELEN(gv));
123 if (strEQ(elem, "PACKAGE"))
124 sv = newSVpv(HvNAME(GvSTASH(gv)), 0);
127 if (strEQ(elem, "SCALAR"))
148 RETURNOP(cLOGOP->op_other);
157 if (op->op_private & OPpASSIGN_BACKWARDS) {
159 temp = left; left = right; right = temp;
161 if (tainting && tainted && !SvTAINTED(left))
163 SvSetSV(right, left);
173 RETURNOP(cCONDOP->op_true);
175 RETURNOP(cCONDOP->op_false);
181 TAINT_NOT; /* Each statement is presumed innocent */
182 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
184 oldsave = scopestack[scopestack_ix - 1];
185 LEAVE_SCOPE(oldsave);
191 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
198 sv_setpvn(TARG,s,len);
200 else if (SvGMAGICAL(TARG))
202 else if (!SvOK(TARG)) {
203 s = SvPV_force(TARG, len);
204 sv_setpv(TARG, ""); /* Suppress warning. */
207 sv_catpvn(TARG,s,len);
217 if (op->op_flags & OPf_MOD) {
218 if (op->op_private & OPpLVAL_INTRO)
219 SAVECLEARSV(curpad[op->op_targ]);
220 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
221 provide_ref(op, curpad[op->op_targ]);
228 last_in_gv = (GV*)(*stack_sp--);
229 return do_readline();
234 dSP; tryAMAGICbinSET(eq,0);
237 SETs((TOPn == value) ? &sv_yes : &sv_no);
245 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
246 SvIVX(TOPs) != IV_MAX)
249 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
264 RETURNOP(cLOGOP->op_other);
270 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
273 SETn( left + right );
281 AV *av = GvAV((GV*)cSVOP->op_sv);
282 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
283 PUSHs(svp ? *svp : &sv_undef);
291 do_join(TARG, *MARK, MARK, SP);
304 /* Oversized hot code. */
308 dSP; dMARK; dORIGMARK;
314 if (op->op_flags & OPf_STACKED)
318 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
324 perl_call_method("PRINT", G_SCALAR);
332 if (!(io = GvIO(gv))) {
334 SV* sv = sv_newmortal();
335 gv_fullname3(sv, gv, Nullch);
336 warn("Filehandle %s never opened", SvPV(sv,na));
339 SETERRNO(EBADF,RMS$_IFI);
342 else if (!(fp = IoOFP(io))) {
344 SV* sv = sv_newmortal();
345 gv_fullname3(sv, gv, Nullch);
347 warn("Filehandle %s opened only for input", SvPV(sv,na));
349 warn("print on closed filehandle %s", SvPV(sv,na));
351 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
358 if (!do_print(*MARK, fp))
362 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
371 if (!do_print(*MARK, fp))
380 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
383 if (IoFLAGS(io) & IOf_FLUSH)
384 if (PerlIO_flush(fp) == EOF)
407 if (SvTYPE(av) != SVt_PVAV)
408 DIE("Not an ARRAY reference");
409 if (op->op_private & OPpLVAL_INTRO)
410 av = (AV*)save_svref((SV**)sv);
411 if (op->op_flags & OPf_REF) {
417 if (SvTYPE(sv) == SVt_PVAV) {
419 if (op->op_flags & OPf_REF) {
427 if (SvTYPE(sv) != SVt_PVGV) {
430 if (SvGMAGICAL(sv)) {
436 if (op->op_flags & OPf_REF ||
437 op->op_private & HINT_STRICT_REFS)
438 DIE(no_usym, "an ARRAY");
439 if (GIMME == G_ARRAY)
444 if (op->op_private & HINT_STRICT_REFS)
445 DIE(no_symref, sym, "an ARRAY");
446 gv = (GV*)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) {
504 if (SvTYPE(sv) != SVt_PVGV) {
507 if (SvGMAGICAL(sv)) {
513 if (op->op_flags & OPf_REF ||
514 op->op_private & HINT_STRICT_REFS)
515 DIE(no_usym, "a HASH");
516 if (GIMME == G_ARRAY) {
523 if (op->op_private & HINT_STRICT_REFS)
524 DIE(no_symref, sym, "a HASH");
525 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
530 if (op->op_private & OPpLVAL_INTRO)
532 if (op->op_flags & OPf_REF) {
539 if (GIMME == G_ARRAY) { /* array wanted */
546 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
559 SV **lastlelem = stack_sp;
560 SV **lastrelem = stack_base + POPMARK;
561 SV **firstrelem = stack_base + POPMARK + 1;
562 SV **firstlelem = lastrelem + 1;
574 delaymagic = DM_DELAY; /* catch simultaneous items */
576 /* If there's a common identifier on both sides we have to take
577 * special care that assigning the identifier on the left doesn't
578 * clobber a value on the right that's used later in the list.
580 if (op->op_private & OPpASSIGN_COMMON) {
581 for (relem = firstrelem; relem <= lastrelem; relem++) {
584 *relem = sv_mortalcopy(sv);
592 while (lelem <= lastlelem) {
593 TAINT_NOT; /* Each item stands on its own, taintwise. */
595 switch (SvTYPE(sv)) {
598 magic = SvMAGICAL(ary) != 0;
602 while (relem <= lastrelem) { /* gobble up all the rest */
607 (void)av_store(ary,i++,sv);
617 magic = SvMAGICAL(hash) != 0;
620 while (relem < lastrelem) { /* gobble up all the rest */
625 sv = &sv_no, relem++;
626 tmpstr = NEWSV(29,0);
628 sv_setsv(tmpstr,*relem); /* value */
630 (void)hv_store_ent(hash,sv,tmpstr,0);
635 if (relem == lastrelem)
636 warn("Odd number of elements in hash list");
640 if (SvTHINKFIRST(sv)) {
641 if (SvREADONLY(sv) && curcop != &compiling) {
642 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
644 if (relem <= lastrelem)
651 if (relem <= lastrelem) {
652 sv_setsv(sv, *relem);
656 sv_setsv(sv, &sv_undef);
661 if (delaymagic & ~DM_DELAY) {
662 if (delaymagic & DM_UID) {
664 (void)setresuid(uid,euid,(Uid_t)-1);
667 (void)setreuid(uid,euid);
670 if ((delaymagic & DM_UID) == DM_RUID) {
672 delaymagic &= ~DM_RUID;
674 # endif /* HAS_SETRUID */
676 if ((delaymagic & DM_UID) == DM_EUID) {
678 delaymagic &= ~DM_EUID;
680 # endif /* HAS_SETEUID */
681 if (delaymagic & DM_UID) {
683 DIE("No setreuid available");
686 # endif /* HAS_SETREUID */
687 #endif /* HAS_SETRESUID */
689 euid = (int)geteuid();
691 if (delaymagic & DM_GID) {
693 (void)setresgid(gid,egid,(Gid_t)-1);
696 (void)setregid(gid,egid);
699 if ((delaymagic & DM_GID) == DM_RGID) {
701 delaymagic &= ~DM_RGID;
703 # endif /* HAS_SETRGID */
705 if ((delaymagic & DM_GID) == DM_EGID) {
707 delaymagic &= ~DM_EGID;
709 # endif /* HAS_SETEGID */
710 if (delaymagic & DM_GID) {
712 DIE("No setregid available");
715 # endif /* HAS_SETREGID */
716 #endif /* HAS_SETRESGID */
718 egid = (int)getegid();
720 tainting |= (uid && (euid != uid || egid != gid));
723 if (GIMME == G_ARRAY) {
727 SP = firstrelem + (lastlelem - firstlelem);
734 SETi(lastrelem - firstrelem + 1);
742 register PMOP *pm = cPMOP;
749 register REGEXP *rx = pm->op_pmregexp;
753 I32 oldsave = savestack_ix;
755 if (op->op_flags & OPf_STACKED)
764 DIE("panic: do_match");
766 if (pm->op_pmflags & PMf_USED) {
767 if (gimme == G_ARRAY)
772 if (!rx->prelen && curpm) {
774 rx = pm->op_pmregexp;
777 if (global = pm->op_pmflags & PMf_GLOBAL) {
779 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
780 MAGIC* mg = mg_find(TARG, 'g');
781 if (mg && mg->mg_len >= 0) {
782 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
783 minmatch = (mg->mg_flags & MGf_MINMATCH);
787 if (!rx->nparens && !global)
788 gimme = G_SCALAR; /* accidental array context? */
789 safebase = (gimme == G_ARRAY) || global;
790 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
792 multiline = pm->op_pmflags & PMf_MULTILINE;
796 if (global && rx->startp[0]) {
800 minmatch = (s == rx->startp[0]);
802 if (pm->op_pmshort) {
803 if (pm->op_pmflags & PMf_SCANFIRST) {
804 if (SvSCREAM(TARG)) {
805 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
807 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
809 else if (pm->op_pmflags & PMf_ALL)
812 else if (!(s = fbm_instr((unsigned char*)s,
813 (unsigned char*)strend, pm->op_pmshort)))
815 else if (pm->op_pmflags & PMf_ALL)
817 if (s && rx->regback >= 0) {
818 ++BmUSEFUL(pm->op_pmshort);
826 else if (!multiline) {
827 if (*SvPVX(pm->op_pmshort) != *s
828 || (pm->op_pmslen > 1
829 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
832 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
833 SvREFCNT_dec(pm->op_pmshort);
834 pm->op_pmshort = Nullsv; /* opt is being useless */
837 if (pregexec(rx, s, strend, truebase, minmatch,
838 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
841 if (pm->op_pmflags & PMf_ONCE)
842 pm->op_pmflags |= PMf_USED;
850 if (gimme == G_ARRAY) {
853 TAINT_IF(rx->exec_tainted);
855 if (global && !iters)
859 EXTEND(SP, iters + i);
860 EXTEND_MORTAL(iters + i);
861 for (i = !i; i <= iters; i++) {
862 PUSHs(sv_newmortal());
864 if ((s = rx->startp[i]) && rx->endp[i] ) {
865 len = rx->endp[i] - s;
866 sv_setpvn(*SP, s, len);
870 truebase = rx->subbeg;
871 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
875 LEAVE_SCOPE(oldsave);
881 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
882 mg = mg_find(TARG, 'g');
884 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
885 mg = mg_find(TARG, 'g');
888 mg->mg_len = rx->endp[0] - truebase;
889 if (rx->startp[0] == rx->endp[0])
890 mg->mg_flags |= MGf_MINMATCH;
892 mg->mg_flags &= ~MGf_MINMATCH;
897 LEAVE_SCOPE(oldsave);
902 ++BmUSEFUL(pm->op_pmshort);
904 if (pm->op_pmflags & PMf_ONCE)
905 pm->op_pmflags |= PMf_USED;
907 rx->subbeg = truebase;
910 rx->endp[0] = s + SvCUR(pm->op_pmshort);
917 Safefree(rx->subbase);
918 tmps = rx->subbase = savepvn(t, strend-t);
920 rx->subend = tmps + (strend-t);
921 tmps = rx->startp[0] = tmps + (s - t);
922 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
924 LEAVE_SCOPE(oldsave);
929 ++BmUSEFUL(pm->op_pmshort);
933 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
934 MAGIC* mg = mg_find(TARG, 'g');
939 LEAVE_SCOPE(oldsave);
940 if (gimme == G_ARRAY)
953 register IO *io = GvIO(last_in_gv);
954 register I32 type = op->op_type;
957 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
962 perl_call_method("READLINE", GIMME);
965 if (GIMME == G_SCALAR) sv_setsv(TARG, TOPs);
972 if (IoFLAGS(io) & IOf_ARGV) {
973 if (IoFLAGS(io) & IOf_START) {
974 IoFLAGS(io) &= ~IOf_START;
976 if (av_len(GvAVn(last_in_gv)) < 0) {
977 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
978 av_push(GvAVn(last_in_gv), tmpstr);
981 fp = nextargv(last_in_gv);
982 if (!fp) { /* Note: fp != IoIFP(io) */
983 (void)do_close(last_in_gv, FALSE); /* now it does*/
984 IoFLAGS(io) |= IOf_START;
987 else if (type == OP_GLOB) {
988 SV *tmpcmd = NEWSV(55, 0);
992 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
993 /* since spawning off a process is a real performance hit */
996 #include <lib$routines.h>
999 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1000 char vmsspec[NAM$C_MAXRSS+1];
1001 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1002 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1003 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1006 struct dsc$descriptor_s wilddsc
1007 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1008 struct dsc$descriptor_vs rsdsc
1009 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1010 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1012 /* We could find out if there's an explicit dev/dir or version
1013 by peeking into lib$find_file's internal context at
1014 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1015 but that's unsupported, so I don't want to do it now and
1016 have it bite someone in the future. */
1017 strcat(tmpfnam,tmpnam(NULL));
1018 cp = SvPV(tmpglob,i);
1020 if (cp[i] == ';') hasver = 1;
1022 if (sts) hasver = 1;
1026 hasdir = isunix = 1;
1029 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1034 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1035 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1036 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1037 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1038 &dfltdsc,NULL,NULL,NULL))&1)) {
1039 end = rstr + (unsigned long int) *rslt;
1040 if (!hasver) while (*end != ';') end--;
1041 *(end++) = '\n'; *end = '\0';
1042 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1044 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1049 while (*(--begin) != ']' && *begin != '>') ;
1052 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1054 if (cxt) (void)lib$find_file_end(&cxt);
1055 if (ok && sts != RMS$_NMF &&
1056 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1059 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1061 PerlIO_close(tmpfp);
1065 PerlIO_rewind(tmpfp);
1067 IoIFP(io) = fp = tmpfp;
1074 sv_setpv(tmpcmd, "for a in ");
1075 sv_catsv(tmpcmd, tmpglob);
1076 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1078 sv_setpv(tmpcmd, "perlglob ");
1079 sv_catsv(tmpcmd, tmpglob);
1080 sv_catpv(tmpcmd, " |");
1084 sv_setpvn(tmpcmd, cshname, cshlen);
1085 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1086 sv_catsv(tmpcmd, tmpglob);
1087 sv_catpv(tmpcmd, "' 2>/dev/null |");
1089 sv_setpv(tmpcmd, "echo ");
1090 sv_catsv(tmpcmd, tmpglob);
1092 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1094 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1097 #endif /* !DOSISH */
1098 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1099 FALSE, 0, 0, Nullfp);
1105 else if (type == OP_GLOB)
1109 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1110 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1111 if (GIMME == G_SCALAR) {
1112 (void)SvOK_off(TARG);
1117 if (GIMME == G_ARRAY) {
1118 sv = sv_2mortal(NEWSV(57, 80));
1123 (void)SvUPGRADE(sv, SVt_PV);
1124 tmplen = SvLEN(sv); /* remember if already alloced */
1126 Sv_Grow(sv, 80); /* try short-buffering it */
1127 if (type == OP_RCATLINE)
1133 if (!sv_gets(sv, fp, offset)) {
1134 PerlIO_clearerr(fp);
1135 if (IoFLAGS(io) & IOf_ARGV) {
1136 fp = nextargv(last_in_gv);
1139 (void)do_close(last_in_gv, FALSE);
1140 IoFLAGS(io) |= IOf_START;
1142 else if (type == OP_GLOB) {
1143 (void)do_close(last_in_gv, FALSE);
1145 if (GIMME == G_SCALAR) {
1146 (void)SvOK_off(TARG);
1151 /* This should not be marked tainted if the fp is marked clean */
1152 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1158 if (type == OP_GLOB) {
1161 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1162 tmps = SvEND(sv) - 1;
1163 if (*tmps == *SvPVX(rs)) {
1168 for (tmps = SvPVX(sv); *tmps; tmps++)
1169 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1170 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1172 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1173 (void)POPs; /* Unmatched wildcard? Chuck it... */
1177 if (GIMME == G_ARRAY) {
1178 if (SvLEN(sv) - SvCUR(sv) > 20) {
1179 SvLEN_set(sv, SvCUR(sv)+1);
1180 Renew(SvPVX(sv), SvLEN(sv), char);
1182 sv = sv_2mortal(NEWSV(58, 80));
1185 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1186 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1190 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1191 Renew(SvPVX(sv), SvLEN(sv), char);
1200 register CONTEXT *cx;
1204 * We don't just use the GIMME macro here because it assumes there's
1205 * already a context, which ain't necessarily so at initial startup.
1208 if (op->op_flags & OPf_KNOW)
1209 gimme = op->op_flags & OPf_LIST;
1210 else if (cxstack_ix >= 0)
1211 gimme = cxstack[cxstack_ix].blk_gimme;
1218 PUSHBLOCK(cx, CXt_BLOCK, sp);
1229 I32 lval = op->op_flags & OPf_MOD;
1231 if (SvTYPE(hv) != SVt_PVHV)
1233 he = hv_fetch_ent(hv, keysv, lval, 0);
1235 if (!he || HeVAL(he) == &sv_undef)
1236 DIE(no_helem, SvPV(keysv, na));
1237 if (op->op_private & OPpLVAL_INTRO)
1238 save_svref(&HeVAL(he));
1239 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1240 provide_ref(op, HeVAL(he));
1242 PUSHs(he ? HeVAL(he) : &sv_undef);
1249 register CONTEXT *cx;
1255 if (op->op_flags & OPf_SPECIAL) {
1256 cx = &cxstack[cxstack_ix];
1257 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1262 if (op->op_flags & OPf_KNOW)
1263 gimme = op->op_flags & OPf_LIST;
1264 else if (cxstack_ix >= 0)
1265 gimme = cxstack[cxstack_ix].blk_gimme;
1269 if (gimme == G_SCALAR) {
1270 if (op->op_private & OPpLEAVE_VOID)
1275 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1278 *MARK = sv_mortalcopy(TOPs);
1287 for (mark = newsp + 1; mark <= SP; mark++)
1288 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1289 *mark = sv_mortalcopy(*mark);
1290 /* in case LEAVE wipes old return values */
1292 curpm = newpm; /* Don't pop $1 et al till now */
1302 register CONTEXT *cx;
1307 cx = &cxstack[cxstack_ix];
1308 if (cx->cx_type != CXt_LOOP)
1309 DIE("panic: pp_iter");
1310 av = cx->blk_loop.iterary;
1311 if (av == curstack && cx->blk_loop.iterix >= cx->blk_oldsp)
1314 if (cx->blk_loop.iterix >= AvFILL(av))
1317 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1319 *cx->blk_loop.itervar = sv;
1322 *cx->blk_loop.itervar = &sv_undef;
1330 register PMOP *pm = cPMOP;
1345 register REGEXP *rx = pm->op_pmregexp;
1347 int force_on_match = 0;
1348 I32 oldsave = savestack_ix;
1350 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1352 if (op->op_flags & OPf_STACKED)
1358 s = SvPV(TARG, len);
1359 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1364 DIE("panic: do_subst");
1367 maxiters = (strend - s) + 10;
1369 if (!rx->prelen && curpm) {
1371 rx = pm->op_pmregexp;
1373 safebase = ((!rx || !rx->nparens) && !sawampersand);
1374 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1376 multiline = pm->op_pmflags & PMf_MULTILINE;
1379 if (pm->op_pmshort) {
1380 if (pm->op_pmflags & PMf_SCANFIRST) {
1381 if (SvSCREAM(TARG)) {
1382 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1384 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1387 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1390 if (s && rx->regback >= 0) {
1391 ++BmUSEFUL(pm->op_pmshort);
1399 else if (!multiline) {
1400 if (*SvPVX(pm->op_pmshort) != *s
1401 || (pm->op_pmslen > 1
1402 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1405 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1406 SvREFCNT_dec(pm->op_pmshort);
1407 pm->op_pmshort = Nullsv; /* opt is being useless */
1410 once = !(rpm->op_pmflags & PMf_GLOBAL);
1411 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1412 c = SvPV(dstr, clen);
1413 if (clen <= rx->minlen) {
1414 /* can do inplace substitution */
1415 if (pregexec(rx, s, strend, orig, 0,
1416 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1417 if (force_on_match) {
1419 s = SvPV_force(TARG, len);
1422 if (rx->subbase) /* oops, no we can't */
1426 SvSCREAM_off(TARG); /* disable possible screamer */
1431 if (m - s > strend - d) { /* faster to shorten from end */
1433 Copy(c, m, clen, char);
1438 Move(d, m, i, char);
1442 SvCUR_set(TARG, m - s);
1443 (void)SvPOK_only(TARG);
1446 LEAVE_SCOPE(oldsave);
1450 else if (i = m - s) { /* faster from front */
1458 Copy(c, m, clen, char);
1459 (void)SvPOK_only(TARG);
1462 LEAVE_SCOPE(oldsave);
1468 Copy(c, d, clen, char);
1469 (void)SvPOK_only(TARG);
1472 LEAVE_SCOPE(oldsave);
1477 (void)SvPOK_only(TARG);
1480 LEAVE_SCOPE(oldsave);
1486 if (iters++ > maxiters)
1487 DIE("Substitution loop");
1492 Move(s, d, i, char);
1496 Copy(c, d, clen, char);
1500 } while (pregexec(rx, s, strend, orig, s == m,
1501 Nullsv, TRUE)); /* (don't match same null twice) */
1504 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1505 Move(s, d, i+1, char); /* include the Null */
1507 (void)SvPOK_only(TARG);
1509 PUSHs(sv_2mortal(newSViv((I32)iters)));
1510 LEAVE_SCOPE(oldsave);
1514 LEAVE_SCOPE(oldsave);
1520 if (pregexec(rx, s, strend, orig, 0,
1521 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1523 if (force_on_match) {
1525 s = SvPV_force(TARG, len);
1528 dstr = NEWSV(25, sv_len(TARG));
1529 sv_setpvn(dstr, m, s-m);
1532 register CONTEXT *cx;
1534 RETURNOP(cPMOP->op_pmreplroot);
1537 if (iters++ > maxiters)
1538 DIE("Substitution loop");
1539 if (rx->subbase && rx->subbase != orig) {
1544 strend = s + (strend - m);
1547 sv_catpvn(dstr, s, m-s);
1550 sv_catpvn(dstr, c, clen);
1553 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1555 sv_catpvn(dstr, s, strend - s);
1557 (void)SvOOK_off(TARG);
1558 Safefree(SvPVX(TARG));
1559 SvPVX(TARG) = SvPVX(dstr);
1560 SvCUR_set(TARG, SvCUR(dstr));
1561 SvLEN_set(TARG, SvLEN(dstr));
1565 (void)SvPOK_only(TARG);
1567 PUSHs(sv_2mortal(newSViv((I32)iters)));
1568 LEAVE_SCOPE(oldsave);
1572 LEAVE_SCOPE(oldsave);
1576 ++BmUSEFUL(pm->op_pmshort);
1578 LEAVE_SCOPE(oldsave);
1587 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1589 LEAVE; /* exit inner scope */
1592 if (stack_base + *markstack_ptr > sp) {
1595 LEAVE; /* exit outer scope */
1596 (void)POPMARK; /* pop src */
1597 items = --*markstack_ptr - markstack_ptr[-1];
1598 (void)POPMARK; /* pop dst */
1599 SP = stack_base + POPMARK; /* pop original mark */
1600 if (GIMME != G_ARRAY) {
1611 ENTER; /* enter inner scope */
1614 src = stack_base[*markstack_ptr];
1618 RETURNOP(cLOGOP->op_other);
1629 register CONTEXT *cx;
1634 if (gimme == G_SCALAR) {
1637 if (SvFLAGS(TOPs) & SVs_TEMP)
1640 *MARK = sv_mortalcopy(TOPs);
1648 for (mark = newsp + 1; mark <= SP; mark++)
1649 if (!(SvFLAGS(*mark) & SVs_TEMP))
1650 *mark = sv_mortalcopy(*mark);
1651 /* in case LEAVE wipes old return values */
1654 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1655 AV* av = cx->blk_sub.argarray;
1660 curpm = newpm; /* Don't pop $1 et al till now */
1664 return pop_return();
1673 register CONTEXT *cx;
1675 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1678 DIE("Not a CODE reference");
1679 switch (SvTYPE(sv)) {
1684 if (sv == &sv_yes) /* unfound import, ignore */
1687 DIE(no_usym, "a subroutine");
1689 if (op->op_private & HINT_STRICT_REFS)
1690 DIE(no_symref, sym, "a subroutine");
1691 cv = perl_get_cv(sym, TRUE);
1695 if (SvTYPE(cv) == SVt_PVCV)
1700 DIE("Not a CODE reference");
1705 if (!(cv = GvCV((GV*)sv)))
1706 cv = sv_2cv(sv, &stash, &gv, TRUE);
1715 DIE("Not a CODE reference");
1717 if (!CvROOT(cv) && !CvXSUB(cv)) {
1718 if (gv = CvGV(cv)) {
1721 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1723 if (SvTYPE(sv) == SVt_PVGV) {
1724 SvREFCNT_dec(GvCV((GV*)sv));
1725 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1729 tmpstr = sv_newmortal();
1730 gv_efullname3(tmpstr, gv, Nullch);
1731 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1732 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1734 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1735 SvTAINTED_off(GvSV(CvGV(cv)));
1739 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1741 DIE("Undefined subroutine called");
1745 if ((op->op_private & OPpENTERSUB_DB)) {
1749 if ( CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)
1750 || strEQ(GvNAME(gv), "END") ) {
1751 /* GV is potentially non-unique */
1752 sv_setsv(sv, newRV((SV*)cv));
1755 gv_efullname3(sv, gv, Nullch);
1758 if (CvXSUB(cv)) curcopdb = curcop;
1760 DIE("No DBsub routine");
1764 if (CvOLDSTYLE(cv)) {
1765 I32 (*fp3)_((int,int,int));
1767 register I32 items = SP - MARK;
1768 /* We dont worry to copy from @_. */
1773 stack_sp = mark + 1;
1774 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1775 items = (*fp3)(CvXSUBANY(cv).any_i32,
1776 MARK - stack_base + 1,
1778 stack_sp = stack_base + items;
1781 I32 markix = TOPMARK;
1786 /* Need to copy @_ to stack. Alternative may be to
1787 * switch stack to @_, and copy return values
1788 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1789 AV* av = GvAV(defgv);
1790 I32 items = AvFILL(av) + 1;
1793 /* Mark is at the end of the stack. */
1795 Copy(AvARRAY(av), sp + 1, items, SV*);
1800 if (curcopdb) { /* We assume that the first
1801 XSUB in &DB::sub is the
1807 /* Do we need to open block here? XXXX */
1808 (void)(*CvXSUB(cv))(cv);
1810 /* Enforce some sanity in scalar context. */
1811 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1812 if (markix > stack_sp - stack_base)
1813 *(stack_base + markix) = &sv_undef;
1815 *(stack_base + markix) = *stack_sp;
1816 stack_sp = stack_base + markix;
1824 register I32 items = SP - MARK;
1825 AV* padlist = CvPADLIST(cv);
1826 SV** svp = AvARRAY(padlist);
1827 push_return(op->op_next);
1828 PUSHBLOCK(cx, CXt_SUB, MARK);
1831 if (CvDEPTH(cv) < 2)
1832 (void)SvREFCNT_inc(cv);
1833 else { /* save temporaries on recursion? */
1834 if (CvDEPTH(cv) == 100 && dowarn)
1835 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1836 if (CvDEPTH(cv) > AvFILL(padlist)) {
1838 AV *newpad = newAV();
1839 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1840 I32 ix = AvFILL((AV*)svp[1]);
1841 svp = AvARRAY(svp[0]);
1842 for ( ;ix > 0; ix--) {
1843 if (svp[ix] != &sv_undef) {
1844 char *name = SvPVX(svp[ix]);
1845 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1846 av_store(newpad, ix,
1847 SvREFCNT_inc(oldpad[ix]) );
1849 else { /* our own lexical */
1851 av_store(newpad, ix, sv = (SV*)newAV());
1852 else if (*name == '%')
1853 av_store(newpad, ix, sv = (SV*)newHV());
1855 av_store(newpad, ix, sv = NEWSV(0,0));
1860 av_store(newpad, ix, sv = NEWSV(0,0));
1864 av = newAV(); /* will be @_ */
1866 av_store(newpad, 0, (SV*)av);
1867 AvFLAGS(av) = AVf_REIFY;
1868 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1869 AvFILL(padlist) = CvDEPTH(cv);
1870 svp = AvARRAY(padlist);
1874 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1876 AV* av = (AV*)curpad[0];
1883 cx->blk_sub.savearray = GvAV(defgv);
1884 cx->blk_sub.argarray = av;
1885 GvAV(defgv) = cx->blk_sub.argarray;
1888 if (items > AvMAX(av) + 1) {
1890 if (AvARRAY(av) != ary) {
1891 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1892 SvPVX(av) = (char*)ary;
1894 if (items > AvMAX(av) + 1) {
1895 AvMAX(av) = items - 1;
1896 Renew(ary,items,SV*);
1898 SvPVX(av) = (char*)ary;
1901 Copy(MARK,AvARRAY(av),items,SV*);
1902 AvFILL(av) = items - 1;
1910 RETURNOP(CvSTART(cv));
1920 I32 lval = op->op_flags & OPf_MOD;
1923 elem -= curcop->cop_arybase;
1924 if (SvTYPE(av) != SVt_PVAV)
1926 svp = av_fetch(av, elem, lval);
1928 if (!svp || *svp == &sv_undef)
1929 DIE(no_aelem, elem);
1930 if (op->op_private & OPpLVAL_INTRO)
1932 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1933 provide_ref(op, *svp);
1935 PUSHs(svp ? *svp : &sv_undef);
1949 (void)SvUPGRADE(sv, SVt_RV);
1950 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1951 (SV*)newHV() : (SV*)newAV());
1966 sv = *(stack_base + TOPMARK + 1);
1979 !(packname = SvPV(sv, packlen)) ||
1980 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1981 !(ob=(SV*)GvIO(iogv)))
1983 char *name = SvPV(nm, na);
1985 if (!packname || !isALPHA(*packname))
1986 DIE("Can't call method \"%s\" without a package or object reference", name);
1987 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
1988 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
1989 stash = gv_stashpvn(packname, packlen, TRUE);
1991 DIE("Can't call method \"%s\" in empty package \"%s\"",
1994 gv = gv_fetchmethod(stash,name);
1996 DIE("Can't locate object method \"%s\" via package \"%s\"",
2001 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2004 if (!ob || !SvOBJECT(ob)) {
2005 char *name = SvPV(nm, na);
2006 DIE("Can't call method \"%s\" on unblessed reference", name);
2009 if (!gv) { /* nothing cached */
2010 char *name = SvPV(nm, na);
2011 gv = gv_fetchmethod(SvSTASH(ob),name);
2013 DIE("Can't locate object method \"%s\" via package \"%s\"",
2014 name, HvNAME(SvSTASH(ob)));