3 * Copyright (c) 1991-1997, 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"))
100 ref = (SV*)GvCVu(gv);
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 SvSetMagicSV(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; dATARGET; tryAMAGICbin(concat,opASSIGN);
197 sv_setpvn(TARG,s,len);
199 else if (SvGMAGICAL(TARG))
201 else if (!SvOK(TARG) && SvTYPE(TARG) <= SVt_PVMG) {
202 sv_setpv(TARG, ""); /* Suppress warning. */
203 s = SvPV_force(TARG, len);
207 sv_catpvn(TARG,s,len);
209 sv_setpvn(TARG,s,len); /* suppress warning */
219 if (op->op_flags & OPf_MOD) {
220 if (op->op_private & OPpLVAL_INTRO)
221 SAVECLEARSV(curpad[op->op_targ]);
222 else if (op->op_private & OPpDEREF)
223 vivify_ref(curpad[op->op_targ], op->op_private & OPpDEREF);
230 last_in_gv = (GV*)(*stack_sp--);
231 return do_readline();
236 dSP; tryAMAGICbinSET(eq,0);
239 SETs(boolSV(TOPn == value));
247 if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
249 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
250 SvIVX(TOPs) != IV_MAX)
253 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
268 RETURNOP(cLOGOP->op_other);
274 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
277 SETn( left + right );
285 AV *av = GvAV((GV*)cSVOP->op_sv);
286 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
287 PUSHs(svp ? *svp : &sv_undef);
295 do_join(TARG, *MARK, MARK, SP);
306 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
307 * will be enough to hold an OP*.
309 SV* sv = sv_newmortal();
310 sv_upgrade(sv, SVt_PVLV);
312 Copy(&op, &LvTARGOFF(sv), 1, OP*);
320 /* Oversized hot code. */
324 dSP; dMARK; dORIGMARK;
330 if (op->op_flags & OPf_STACKED)
334 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
335 if (MARK == ORIGMARK) {
338 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
345 perl_call_method("PRINT", G_SCALAR);
353 if (!(io = GvIO(gv))) {
355 SV* sv = sv_newmortal();
356 gv_fullname3(sv, gv, Nullch);
357 warn("Filehandle %s never opened", SvPV(sv,na));
360 SETERRNO(EBADF,RMS$_IFI);
363 else if (!(fp = IoOFP(io))) {
365 SV* sv = sv_newmortal();
366 gv_fullname3(sv, gv, Nullch);
368 warn("Filehandle %s opened only for input", SvPV(sv,na));
370 warn("print on closed filehandle %s", SvPV(sv,na));
372 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
379 if (!do_print(*MARK, fp))
383 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
392 if (!do_print(*MARK, fp))
401 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
404 if (IoFLAGS(io) & IOf_FLUSH)
405 if (PerlIO_flush(fp) == EOF)
427 if (SvTYPE(av) != SVt_PVAV)
428 DIE("Not an ARRAY reference");
429 if (op->op_private & OPpLVAL_INTRO)
430 av = (AV*)save_svref((SV**)sv);
431 if (op->op_flags & OPf_REF) {
437 if (SvTYPE(sv) == SVt_PVAV) {
439 if (op->op_flags & OPf_REF) {
447 if (SvTYPE(sv) != SVt_PVGV) {
450 if (SvGMAGICAL(sv)) {
456 if (op->op_flags & OPf_REF ||
457 op->op_private & HINT_STRICT_REFS)
458 DIE(no_usym, "an ARRAY");
461 if (GIMME == G_ARRAY)
466 if (op->op_private & HINT_STRICT_REFS)
467 DIE(no_symref, sym, "an ARRAY");
468 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
473 if (op->op_private & OPpLVAL_INTRO)
475 if (op->op_flags & OPf_REF) {
482 if (GIMME == G_ARRAY) {
483 I32 maxarg = AvFILL(av) + 1;
485 Copy(AvARRAY(av), SP+1, maxarg, SV*);
490 I32 maxarg = AvFILL(av) + 1;
504 if (SvTYPE(hv) != SVt_PVHV)
505 DIE("Not a HASH reference");
506 if (op->op_private & OPpLVAL_INTRO)
507 hv = (HV*)save_svref((SV**)sv);
508 if (op->op_flags & OPf_REF) {
514 if (SvTYPE(sv) == SVt_PVHV) {
516 if (op->op_flags & OPf_REF) {
524 if (SvTYPE(sv) != SVt_PVGV) {
527 if (SvGMAGICAL(sv)) {
533 if (op->op_flags & OPf_REF ||
534 op->op_private & HINT_STRICT_REFS)
535 DIE(no_usym, "a HASH");
538 if (GIMME == G_ARRAY) {
545 if (op->op_private & HINT_STRICT_REFS)
546 DIE(no_symref, sym, "a HASH");
547 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
552 if (op->op_private & OPpLVAL_INTRO)
554 if (op->op_flags & OPf_REF) {
561 if (GIMME == G_ARRAY) { /* array wanted */
568 sv_setpvf(TARG, "%ld/%ld",
569 (long)HvFILL(hv), (long)HvMAX(hv) + 1);
580 SV **lastlelem = stack_sp;
581 SV **lastrelem = stack_base + POPMARK;
582 SV **firstrelem = stack_base + POPMARK + 1;
583 SV **firstlelem = lastrelem + 1;
596 delaymagic = DM_DELAY; /* catch simultaneous items */
598 /* If there's a common identifier on both sides we have to take
599 * special care that assigning the identifier on the left doesn't
600 * clobber a value on the right that's used later in the list.
602 if (op->op_private & OPpASSIGN_COMMON) {
603 for (relem = firstrelem; relem <= lastrelem; relem++) {
606 TAINT_NOT; /* Each item is independent */
607 *relem = sv_mortalcopy(sv);
616 while (lelem <= lastlelem) {
617 TAINT_NOT; /* Each item stands on its own, taintwise. */
619 switch (SvTYPE(sv)) {
622 magic = SvMAGICAL(ary) != 0;
625 av_extend(ary, lastrelem - relem);
627 while (relem <= lastrelem) { /* gobble up all the rest */
632 (void)av_store(ary,i++,sv);
642 magic = SvMAGICAL(hash) != 0;
645 while (relem < lastrelem) { /* gobble up all the rest */
650 sv = &sv_no, relem++;
651 tmpstr = NEWSV(29,0);
653 sv_setsv(tmpstr,*relem); /* value */
655 (void)hv_store_ent(hash,sv,tmpstr,0);
660 if (relem == lastrelem)
661 warn("Odd number of elements in hash list");
665 if (SvTHINKFIRST(sv)) {
666 if (SvREADONLY(sv) && curcop != &compiling) {
667 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
669 if (relem <= lastrelem)
676 if (relem <= lastrelem) {
677 sv_setsv(sv, *relem);
681 sv_setsv(sv, &sv_undef);
686 if (delaymagic & ~DM_DELAY) {
687 if (delaymagic & DM_UID) {
689 (void)setresuid(uid,euid,(Uid_t)-1);
692 (void)setreuid(uid,euid);
695 if ((delaymagic & DM_UID) == DM_RUID) {
697 delaymagic &= ~DM_RUID;
699 # endif /* HAS_SETRUID */
701 if ((delaymagic & DM_UID) == DM_EUID) {
703 delaymagic &= ~DM_EUID;
705 # endif /* HAS_SETEUID */
706 if (delaymagic & DM_UID) {
708 DIE("No setreuid available");
711 # endif /* HAS_SETREUID */
712 #endif /* HAS_SETRESUID */
714 euid = (int)geteuid();
716 if (delaymagic & DM_GID) {
718 (void)setresgid(gid,egid,(Gid_t)-1);
721 (void)setregid(gid,egid);
724 if ((delaymagic & DM_GID) == DM_RGID) {
726 delaymagic &= ~DM_RGID;
728 # endif /* HAS_SETRGID */
730 if ((delaymagic & DM_GID) == DM_EGID) {
732 delaymagic &= ~DM_EGID;
734 # endif /* HAS_SETEGID */
735 if (delaymagic & DM_GID) {
737 DIE("No setregid available");
740 # endif /* HAS_SETREGID */
741 #endif /* HAS_SETRESGID */
743 egid = (int)getegid();
745 tainting |= (uid && (euid != uid || egid != gid));
752 else if (gimme == G_SCALAR) {
755 SETi(lastrelem - firstrelem + 1);
761 SP = firstrelem + (lastlelem - firstlelem);
762 lelem = firstlelem + (relem - firstrelem);
764 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
772 register PMOP *pm = cPMOP;
779 register REGEXP *rx = pm->op_pmregexp;
783 I32 oldsave = savestack_ix;
784 I32 update_minmatch = 1;
786 if (op->op_flags & OPf_STACKED)
795 DIE("panic: do_match");
798 if (pm->op_pmflags & PMf_USED) {
799 if (gimme == G_ARRAY)
804 if (!rx->prelen && curpm) {
806 rx = pm->op_pmregexp;
809 if (global = pm->op_pmflags & PMf_GLOBAL) {
811 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
812 MAGIC* mg = mg_find(TARG, 'g');
813 if (mg && mg->mg_len >= 0) {
814 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
815 minmatch = (mg->mg_flags & MGf_MINMATCH);
820 if (!rx->nparens && !global)
821 gimme = G_SCALAR; /* accidental array context? */
822 safebase = (((gimme == G_ARRAY) || global || !rx->nparens)
824 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
826 multiline = pm->op_pmflags & PMf_MULTILINE;
830 if (global && rx->startp[0]) {
832 if ((s + rx->minlen) > strend)
834 if (update_minmatch++)
835 minmatch = (s == rx->startp[0]);
837 if (pm->op_pmshort) {
838 if (pm->op_pmflags & PMf_SCANFIRST) {
839 if (SvSCREAM(TARG)) {
840 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
842 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
844 else if (pm->op_pmflags & PMf_ALL)
847 else if (!(s = fbm_instr((unsigned char*)s,
848 (unsigned char*)strend, pm->op_pmshort)))
850 else if (pm->op_pmflags & PMf_ALL)
852 if (s && rx->regback >= 0) {
853 ++BmUSEFUL(pm->op_pmshort);
861 else if (!multiline) {
862 if (*SvPVX(pm->op_pmshort) != *s
863 || (pm->op_pmslen > 1
864 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
867 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
868 SvREFCNT_dec(pm->op_pmshort);
869 pm->op_pmshort = Nullsv; /* opt is being useless */
872 if (pregexec(rx, s, strend, truebase, minmatch,
873 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
876 if (pm->op_pmflags & PMf_ONCE)
877 pm->op_pmflags |= PMf_USED;
885 TAINT_IF(rx->exec_tainted);
886 if (gimme == G_ARRAY) {
890 if (global && !iters)
894 EXTEND(SP, iters + i);
895 EXTEND_MORTAL(iters + i);
896 for (i = !i; i <= iters; i++) {
897 PUSHs(sv_newmortal());
899 if ((s = rx->startp[i]) && rx->endp[i] ) {
900 len = rx->endp[i] - s;
901 sv_setpvn(*SP, s, len);
905 truebase = rx->subbeg;
907 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
911 LEAVE_SCOPE(oldsave);
917 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
918 mg = mg_find(TARG, 'g');
920 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
921 mg = mg_find(TARG, 'g');
924 mg->mg_len = rx->endp[0] - rx->subbeg;
925 if (rx->startp[0] == rx->endp[0])
926 mg->mg_flags |= MGf_MINMATCH;
928 mg->mg_flags &= ~MGf_MINMATCH;
931 LEAVE_SCOPE(oldsave);
936 TAINT_IF(rx->exec_tainted);
937 ++BmUSEFUL(pm->op_pmshort);
939 if (pm->op_pmflags & PMf_ONCE)
940 pm->op_pmflags |= PMf_USED;
941 Safefree(rx->subbase);
942 rx->subbase = Nullch;
944 rx->subbeg = truebase;
947 rx->endp[0] = s + SvCUR(pm->op_pmshort);
953 tmps = rx->subbase = savepvn(t, strend-t);
955 rx->subend = tmps + (strend-t);
956 tmps = rx->startp[0] = tmps + (s - t);
957 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
959 LEAVE_SCOPE(oldsave);
964 ++BmUSEFUL(pm->op_pmshort);
967 if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
968 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
969 MAGIC* mg = mg_find(TARG, 'g');
974 LEAVE_SCOPE(oldsave);
975 if (gimme == G_ARRAY)
988 register IO *io = GvIO(last_in_gv);
989 register I32 type = op->op_type;
993 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
998 perl_call_method("READLINE", gimme);
1001 if (gimme == G_SCALAR)
1002 SvSetMagicSV_nosteal(TARG, TOPs);
1009 if (IoFLAGS(io) & IOf_ARGV) {
1010 if (IoFLAGS(io) & IOf_START) {
1011 IoFLAGS(io) &= ~IOf_START;
1013 if (av_len(GvAVn(last_in_gv)) < 0) {
1014 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
1015 av_push(GvAVn(last_in_gv), tmpstr);
1018 fp = nextargv(last_in_gv);
1019 if (!fp) { /* Note: fp != IoIFP(io) */
1020 (void)do_close(last_in_gv, FALSE); /* now it does*/
1021 IoFLAGS(io) |= IOf_START;
1024 else if (type == OP_GLOB) {
1025 SV *tmpcmd = NEWSV(55, 0);
1029 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1030 /* since spawning off a process is a real performance hit */
1032 #include <descrip.h>
1033 #include <lib$routines.h>
1036 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1037 char vmsspec[NAM$C_MAXRSS+1];
1038 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1039 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1040 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1043 struct dsc$descriptor_s wilddsc
1044 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1045 struct dsc$descriptor_vs rsdsc
1046 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1047 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1049 /* We could find out if there's an explicit dev/dir or version
1050 by peeking into lib$find_file's internal context at
1051 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1052 but that's unsupported, so I don't want to do it now and
1053 have it bite someone in the future. */
1054 strcat(tmpfnam,tmpnam(NULL));
1055 cp = SvPV(tmpglob,i);
1057 if (cp[i] == ';') hasver = 1;
1059 if (sts) hasver = 1;
1063 hasdir = isunix = 1;
1066 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1071 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1072 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1073 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1074 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1075 &dfltdsc,NULL,NULL,NULL))&1)) {
1076 end = rstr + (unsigned long int) *rslt;
1077 if (!hasver) while (*end != ';') end--;
1078 *(end++) = '\n'; *end = '\0';
1079 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1081 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1086 while (*(--begin) != ']' && *begin != '>') ;
1089 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1091 if (cxt) (void)lib$find_file_end(&cxt);
1092 if (ok && sts != RMS$_NMF &&
1093 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1096 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1098 PerlIO_close(tmpfp);
1102 PerlIO_rewind(tmpfp);
1104 IoIFP(io) = fp = tmpfp;
1105 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
1112 sv_setpv(tmpcmd, "for a in ");
1113 sv_catsv(tmpcmd, tmpglob);
1114 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1116 sv_setpv(tmpcmd, "perlglob ");
1117 sv_catsv(tmpcmd, tmpglob);
1118 sv_catpv(tmpcmd, " |");
1122 sv_setpvn(tmpcmd, cshname, cshlen);
1123 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1124 sv_catsv(tmpcmd, tmpglob);
1125 sv_catpv(tmpcmd, "' 2>/dev/null |");
1127 sv_setpv(tmpcmd, "echo ");
1128 sv_catsv(tmpcmd, tmpglob);
1130 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1132 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1135 #endif /* !DOSISH */
1136 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1137 FALSE, 0, 0, Nullfp);
1143 else if (type == OP_GLOB)
1147 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1148 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1149 if (gimme == G_SCALAR) {
1150 (void)SvOK_off(TARG);
1155 if (gimme == G_SCALAR) {
1159 (void)SvUPGRADE(sv, SVt_PV);
1160 tmplen = SvLEN(sv); /* remember if already alloced */
1162 Sv_Grow(sv, 80); /* try short-buffering it */
1163 if (type == OP_RCATLINE)
1169 sv = sv_2mortal(NEWSV(57, 80));
1173 if (!sv_gets(sv, fp, offset)) {
1174 PerlIO_clearerr(fp);
1175 if (IoFLAGS(io) & IOf_ARGV) {
1176 fp = nextargv(last_in_gv);
1179 (void)do_close(last_in_gv, FALSE);
1180 IoFLAGS(io) |= IOf_START;
1182 else if (type == OP_GLOB) {
1183 if (do_close(last_in_gv, FALSE) & ~0xFF)
1184 warn("internal error: glob failed");
1186 if (gimme == G_SCALAR) {
1187 (void)SvOK_off(TARG);
1192 /* This should not be marked tainted if the fp is marked clean */
1193 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1200 if (type == OP_GLOB) {
1203 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1204 tmps = SvEND(sv) - 1;
1205 if (*tmps == *SvPVX(rs)) {
1210 for (tmps = SvPVX(sv); *tmps; tmps++)
1211 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1212 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1214 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1215 (void)POPs; /* Unmatched wildcard? Chuck it... */
1219 if (gimme == G_ARRAY) {
1220 if (SvLEN(sv) - SvCUR(sv) > 20) {
1221 SvLEN_set(sv, SvCUR(sv)+1);
1222 Renew(SvPVX(sv), SvLEN(sv), char);
1224 sv = sv_2mortal(NEWSV(58, 80));
1227 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1228 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1232 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1233 Renew(SvPVX(sv), SvLEN(sv), char);
1242 register CONTEXT *cx;
1243 I32 gimme = OP_GIMME(op, -1);
1246 if (cxstack_ix >= 0)
1247 gimme = cxstack[cxstack_ix].blk_gimme;
1255 PUSHBLOCK(cx, CXt_BLOCK, sp);
1266 U32 lval = op->op_flags & OPf_MOD;
1267 U32 defer = op->op_private & OPpLVAL_DEFER;
1269 if (SvTYPE(hv) != SVt_PVHV)
1271 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
1273 if (!he || HeVAL(he) == &sv_undef) {
1277 DIE(no_helem, SvPV(keysv, na));
1278 lv = sv_newmortal();
1279 sv_upgrade(lv, SVt_PVLV);
1281 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1282 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1283 LvTARG(lv) = SvREFCNT_inc(hv);
1288 if (op->op_private & OPpLVAL_INTRO) {
1289 if (HvNAME(hv) && isGV(HeVAL(he)))
1290 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1292 save_svref(&HeVAL(he));
1294 else if (op->op_private & OPpDEREF)
1295 vivify_ref(HeVAL(he), op->op_private & OPpDEREF);
1297 PUSHs(he ? HeVAL(he) : &sv_undef);
1304 register CONTEXT *cx;
1310 if (op->op_flags & OPf_SPECIAL) {
1311 cx = &cxstack[cxstack_ix];
1312 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1317 gimme = OP_GIMME(op, -1);
1319 if (cxstack_ix >= 0)
1320 gimme = cxstack[cxstack_ix].blk_gimme;
1326 if (gimme == G_VOID)
1328 else if (gimme == G_SCALAR) {
1331 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1334 *MARK = sv_mortalcopy(TOPs);
1341 else if (gimme == G_ARRAY) {
1342 /* in case LEAVE wipes old return values */
1343 for (mark = newsp + 1; mark <= SP; mark++) {
1344 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
1345 *mark = sv_mortalcopy(*mark);
1346 TAINT_NOT; /* Each item is independent */
1350 curpm = newpm; /* Don't pop $1 et al till now */
1360 register CONTEXT *cx;
1365 cx = &cxstack[cxstack_ix];
1366 if (cx->cx_type != CXt_LOOP)
1367 DIE("panic: pp_iter");
1369 av = cx->blk_loop.iterary;
1370 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1373 SvREFCNT_dec(*cx->blk_loop.itervar);
1375 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1379 if (av != curstack && SvIMMORTAL(sv)) {
1380 SV *lv = cx->blk_loop.iterlval;
1381 if (lv && SvREFCNT(lv) > 1) {
1386 SvREFCNT_dec(LvTARG(lv));
1388 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
1389 sv_upgrade(lv, SVt_PVLV);
1391 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1393 LvTARG(lv) = SvREFCNT_inc(av);
1394 LvTARGOFF(lv) = cx->blk_loop.iterix;
1399 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1406 register PMOP *pm = cPMOP;
1422 register REGEXP *rx = pm->op_pmregexp;
1424 int force_on_match = 0;
1425 I32 oldsave = savestack_ix;
1427 /* known replacement string? */
1428 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
1429 if (op->op_flags & OPf_STACKED)
1435 if (SvREADONLY(TARG)
1436 || (SvTYPE(TARG) > SVt_PVLV
1437 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1439 s = SvPV(TARG, len);
1440 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
1446 DIE("panic: do_subst");
1449 maxiters = (strend - s) + 10;
1451 if (!rx->prelen && curpm) {
1453 rx = pm->op_pmregexp;
1455 safebase = (!rx->nparens && !sawampersand);
1456 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1458 multiline = pm->op_pmflags & PMf_MULTILINE;
1461 if (pm->op_pmshort) {
1462 if (pm->op_pmflags & PMf_SCANFIRST) {
1463 if (SvSCREAM(TARG)) {
1464 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1466 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1469 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1472 if (s && rx->regback >= 0) {
1473 ++BmUSEFUL(pm->op_pmshort);
1481 else if (!multiline) {
1482 if (*SvPVX(pm->op_pmshort) != *s
1483 || (pm->op_pmslen > 1
1484 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1487 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1488 SvREFCNT_dec(pm->op_pmshort);
1489 pm->op_pmshort = Nullsv; /* opt is being useless */
1493 /* only replace once? */
1494 once = !(rpm->op_pmflags & PMf_GLOBAL);
1496 /* known replacement string? */
1497 c = dstr ? SvPV(dstr, clen) : Nullch;
1499 /* can do inplace substitution? */
1500 if (c && clen <= rx->minlen && safebase) {
1501 if (! pregexec(rx, s, strend, orig, 0,
1502 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1504 LEAVE_SCOPE(oldsave);
1507 if (force_on_match) {
1509 s = SvPV_force(TARG, len);
1514 SvSCREAM_off(TARG); /* disable possible screamer */
1516 rxtainted = rx->exec_tainted;
1520 if (m - s > strend - d) { /* faster to shorten from end */
1522 Copy(c, m, clen, char);
1527 Move(d, m, i, char);
1531 SvCUR_set(TARG, m - s);
1534 else if (i = m - s) { /* faster from front */
1542 Copy(c, m, clen, char);
1547 Copy(c, d, clen, char);
1552 TAINT_IF(rxtainted);
1558 if (iters++ > maxiters)
1559 DIE("Substitution loop");
1560 rxtainted |= rx->exec_tainted;
1565 Move(s, d, i, char);
1569 Copy(c, d, clen, char);
1573 } while (pregexec(rx, s, strend, orig, s == m,
1574 Nullsv, TRUE)); /* don't match same null twice */
1577 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1578 Move(s, d, i+1, char); /* include the NUL */
1580 TAINT_IF(rxtainted);
1581 PUSHs(sv_2mortal(newSViv((I32)iters)));
1583 (void)SvPOK_only(TARG);
1586 LEAVE_SCOPE(oldsave);
1590 if (pregexec(rx, s, strend, orig, 0,
1591 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1592 if (force_on_match) {
1594 s = SvPV_force(TARG, len);
1597 rxtainted = rx->exec_tainted;
1598 dstr = NEWSV(25, sv_len(TARG));
1599 sv_setpvn(dstr, m, s-m);
1602 register CONTEXT *cx;
1604 RETURNOP(cPMOP->op_pmreplroot);
1607 if (iters++ > maxiters)
1608 DIE("Substitution loop");
1609 rxtainted |= rx->exec_tainted;
1610 if (rx->subbase && rx->subbase != orig) {
1615 strend = s + (strend - m);
1618 sv_catpvn(dstr, s, m-s);
1621 sv_catpvn(dstr, c, clen);
1624 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1625 sv_catpvn(dstr, s, strend - s);
1627 TAINT_IF(rxtainted);
1629 (void)SvOOK_off(TARG);
1630 Safefree(SvPVX(TARG));
1631 SvPVX(TARG) = SvPVX(dstr);
1632 SvCUR_set(TARG, SvCUR(dstr));
1633 SvLEN_set(TARG, SvLEN(dstr));
1637 (void)SvPOK_only(TARG);
1640 PUSHs(sv_2mortal(newSViv((I32)iters)));
1641 LEAVE_SCOPE(oldsave);
1647 ++BmUSEFUL(pm->op_pmshort);
1651 LEAVE_SCOPE(oldsave);
1660 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1662 LEAVE; /* exit inner scope */
1665 if (stack_base + *markstack_ptr > sp) {
1667 I32 gimme = GIMME_V;
1669 LEAVE; /* exit outer scope */
1670 (void)POPMARK; /* pop src */
1671 items = --*markstack_ptr - markstack_ptr[-1];
1672 (void)POPMARK; /* pop dst */
1673 SP = stack_base + POPMARK; /* pop original mark */
1674 if (gimme == G_SCALAR) {
1678 else if (gimme == G_ARRAY)
1685 ENTER; /* enter inner scope */
1688 src = stack_base[*markstack_ptr];
1692 RETURNOP(cLOGOP->op_other);
1703 register CONTEXT *cx;
1704 struct block_sub cxsub;
1707 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1710 if (gimme == G_SCALAR) {
1713 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1720 else if (gimme == G_ARRAY) {
1721 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1722 if (!SvTEMP(*MARK)) {
1723 *MARK = sv_mortalcopy(*MARK);
1724 TAINT_NOT; /* Each item is independent */
1730 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1731 curpm = newpm; /* ... and pop $1 et al */
1734 return pop_return();
1743 register CONTEXT *cx;
1745 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1748 DIE("Not a CODE reference");
1749 switch (SvTYPE(sv)) {
1754 if (sv == &sv_yes) /* unfound import, ignore */
1756 if (SvGMAGICAL(sv)) {
1758 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1763 DIE(no_usym, "a subroutine");
1764 if (op->op_private & HINT_STRICT_REFS)
1765 DIE(no_symref, sym, "a subroutine");
1766 cv = perl_get_cv(sym, TRUE);
1770 if (SvTYPE(cv) == SVt_PVCV)
1775 DIE("Not a CODE reference");
1780 if (!(cv = GvCVu((GV*)sv)))
1781 cv = sv_2cv(sv, &stash, &gv, TRUE);
1790 DIE("Not a CODE reference");
1792 if (!CvROOT(cv) && !CvXSUB(cv)) {
1796 /* anonymous or undef'd function leaves us no recourse */
1797 if (CvANON(cv) || !(gv = CvGV(cv)))
1798 DIE("Undefined subroutine called");
1799 /* autoloaded stub? */
1800 if (cv != GvCV(gv)) {
1804 /* should call AUTOLOAD now? */
1805 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1812 subname = sv_newmortal();
1813 gv_efullname3(subname, gv, Nullch);
1814 DIE("Undefined subroutine &%s called", SvPVX(subname));
1818 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1823 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1824 || strEQ(GvNAME(gv), "END")
1825 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1826 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1827 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1828 /* GV is potentially non-unique, or contain different CV. */
1829 sv_setsv(sv, newRV((SV*)cv));
1832 gv_efullname3(sv, gv, Nullch);
1835 if (CvXSUB(cv)) curcopdb = curcop;
1837 DIE("No DBsub routine");
1841 if (CvOLDSTYLE(cv)) {
1842 I32 (*fp3)_((int,int,int));
1844 register I32 items = SP - MARK;
1845 /* We dont worry to copy from @_. */
1850 stack_sp = mark + 1;
1851 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1852 items = (*fp3)(CvXSUBANY(cv).any_i32,
1853 MARK - stack_base + 1,
1855 stack_sp = stack_base + items;
1858 I32 markix = TOPMARK;
1863 /* Need to copy @_ to stack. Alternative may be to
1864 * switch stack to @_, and copy return values
1865 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1866 AV* av = GvAV(defgv);
1867 I32 items = AvFILL(av) + 1;
1870 /* Mark is at the end of the stack. */
1872 Copy(AvARRAY(av), sp + 1, items, SV*);
1877 if (curcopdb) { /* We assume that the first
1878 XSUB in &DB::sub is the
1884 /* Do we need to open block here? XXXX */
1885 (void)(*CvXSUB(cv))(cv);
1887 /* Enforce some sanity in scalar context. */
1888 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1889 if (markix > stack_sp - stack_base)
1890 *(stack_base + markix) = &sv_undef;
1892 *(stack_base + markix) = *stack_sp;
1893 stack_sp = stack_base + markix;
1901 register I32 items = SP - MARK;
1902 AV* padlist = CvPADLIST(cv);
1903 SV** svp = AvARRAY(padlist);
1904 push_return(op->op_next);
1905 PUSHBLOCK(cx, CXt_SUB, MARK);
1908 if (CvDEPTH(cv) < 2)
1909 (void)SvREFCNT_inc(cv);
1910 else { /* save temporaries on recursion? */
1911 if (CvDEPTH(cv) == 100 && dowarn
1912 && !(perldb && cv == GvCV(DBsub)))
1913 sub_crush_depth(cv);
1914 if (CvDEPTH(cv) > AvFILL(padlist)) {
1916 AV *newpad = newAV();
1917 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1918 I32 ix = AvFILL((AV*)svp[1]);
1919 svp = AvARRAY(svp[0]);
1920 for ( ;ix > 0; ix--) {
1921 if (svp[ix] != &sv_undef) {
1922 char *name = SvPVX(svp[ix]);
1923 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1924 || *name == '&') /* anonymous code? */
1926 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1928 else { /* our own lexical */
1930 av_store(newpad, ix, sv = (SV*)newAV());
1931 else if (*name == '%')
1932 av_store(newpad, ix, sv = (SV*)newHV());
1934 av_store(newpad, ix, sv = NEWSV(0,0));
1939 av_store(newpad, ix, sv = NEWSV(0,0));
1943 av = newAV(); /* will be @_ */
1945 av_store(newpad, 0, (SV*)av);
1946 AvFLAGS(av) = AVf_REIFY;
1947 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1948 AvFILL(padlist) = CvDEPTH(cv);
1949 svp = AvARRAY(padlist);
1953 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1955 AV* av = (AV*)curpad[0];
1962 cx->blk_sub.savearray = GvAV(defgv);
1963 cx->blk_sub.argarray = av;
1964 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1967 if (items > AvMAX(av) + 1) {
1969 if (AvARRAY(av) != ary) {
1970 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1971 SvPVX(av) = (char*)ary;
1973 if (items > AvMAX(av) + 1) {
1974 AvMAX(av) = items - 1;
1975 Renew(ary,items,SV*);
1977 SvPVX(av) = (char*)ary;
1980 Copy(MARK,AvARRAY(av),items,SV*);
1981 AvFILL(av) = items - 1;
1989 RETURNOP(CvSTART(cv));
1998 warn("Deep recursion on anonymous subroutine");
2000 SV* tmpstr = sv_newmortal();
2001 gv_efullname3(tmpstr, CvGV(cv), Nullch);
2002 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
2012 U32 lval = op->op_flags & OPf_MOD;
2013 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
2016 elem -= curcop->cop_arybase;
2017 if (SvTYPE(av) != SVt_PVAV)
2019 svp = av_fetch(av, elem, lval && !defer);
2021 if (!svp || *svp == &sv_undef) {
2024 DIE(no_aelem, elem);
2025 lv = sv_newmortal();
2026 sv_upgrade(lv, SVt_PVLV);
2028 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2029 LvTARG(lv) = SvREFCNT_inc(av);
2030 LvTARGOFF(lv) = elem;
2035 if (op->op_private & OPpLVAL_INTRO)
2037 else if (op->op_private & OPpDEREF)
2038 vivify_ref(*svp, op->op_private & OPpDEREF);
2040 PUSHs(svp ? *svp : &sv_undef);
2045 vivify_ref(sv, to_what)
2054 if (SvTYPE(sv) < SVt_RV)
2055 sv_upgrade(sv, SVt_RV);
2056 else if (SvTYPE(sv) >= SVt_PV) {
2057 (void)SvOOK_off(sv);
2058 Safefree(SvPVX(sv));
2059 SvLEN(sv) = SvCUR(sv) = 0;
2063 SvRV(sv) = newSV(0);
2066 SvRV(sv) = (SV*)newAV();
2069 SvRV(sv) = (SV*)newHV();
2088 name = SvPV(TOPs, na);
2089 sv = *(stack_base + TOPMARK + 1);
2100 !(packname = SvPV(sv, packlen)) ||
2101 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2102 !(ob=(SV*)GvIO(iogv)))
2104 if (!packname || !isIDFIRST(*packname))
2105 DIE("Can't call method \"%s\" without a package or object reference", name);
2106 stash = gv_stashpvn(packname, packlen, TRUE);
2109 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2112 if (!ob || !SvOBJECT(ob))
2113 DIE("Can't call method \"%s\" on unblessed reference", name);
2115 stash = SvSTASH(ob);
2118 gv = gv_fetchmethod(stash, name);
2124 for (p = name; *p; p++) {
2126 sep = p, leaf = p + 1;
2127 else if (*p == ':' && *(p + 1) == ':')
2128 sep = p, leaf = p + 2;
2130 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
2131 packname = HvNAME(sep ? curcop->cop_stash : stash);
2132 packlen = strlen(packname);
2136 packlen = sep - name;
2138 DIE("Can't locate object method \"%s\" via package \"%.*s\"",
2139 leaf, (int)packlen, packname);
2141 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);