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 sprintf(buf, "%ld/%ld", (long)HvFILL(hv), (long)HvMAX(hv)+1);
581 SV **lastlelem = stack_sp;
582 SV **lastrelem = stack_base + POPMARK;
583 SV **firstrelem = stack_base + POPMARK + 1;
584 SV **firstlelem = lastrelem + 1;
597 delaymagic = DM_DELAY; /* catch simultaneous items */
599 /* If there's a common identifier on both sides we have to take
600 * special care that assigning the identifier on the left doesn't
601 * clobber a value on the right that's used later in the list.
603 if (op->op_private & OPpASSIGN_COMMON) {
604 for (relem = firstrelem; relem <= lastrelem; relem++) {
607 *relem = sv_mortalcopy(sv);
615 while (lelem <= lastlelem) {
616 TAINT_NOT; /* Each item stands on its own, taintwise. */
618 switch (SvTYPE(sv)) {
621 magic = SvMAGICAL(ary) != 0;
624 av_extend(ary, lastrelem - relem);
626 while (relem <= lastrelem) { /* gobble up all the rest */
631 (void)av_store(ary,i++,sv);
641 magic = SvMAGICAL(hash) != 0;
644 while (relem < lastrelem) { /* gobble up all the rest */
649 sv = &sv_no, relem++;
650 tmpstr = NEWSV(29,0);
652 sv_setsv(tmpstr,*relem); /* value */
654 (void)hv_store_ent(hash,sv,tmpstr,0);
659 if (relem == lastrelem)
660 warn("Odd number of elements in hash list");
664 if (SvTHINKFIRST(sv)) {
665 if (SvREADONLY(sv) && curcop != &compiling) {
666 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
668 if (relem <= lastrelem)
675 if (relem <= lastrelem) {
676 sv_setsv(sv, *relem);
680 sv_setsv(sv, &sv_undef);
685 if (delaymagic & ~DM_DELAY) {
686 if (delaymagic & DM_UID) {
688 (void)setresuid(uid,euid,(Uid_t)-1);
691 (void)setreuid(uid,euid);
694 if ((delaymagic & DM_UID) == DM_RUID) {
696 delaymagic &= ~DM_RUID;
698 # endif /* HAS_SETRUID */
700 if ((delaymagic & DM_UID) == DM_EUID) {
702 delaymagic &= ~DM_EUID;
704 # endif /* HAS_SETEUID */
705 if (delaymagic & DM_UID) {
707 DIE("No setreuid available");
710 # endif /* HAS_SETREUID */
711 #endif /* HAS_SETRESUID */
713 euid = (int)geteuid();
715 if (delaymagic & DM_GID) {
717 (void)setresgid(gid,egid,(Gid_t)-1);
720 (void)setregid(gid,egid);
723 if ((delaymagic & DM_GID) == DM_RGID) {
725 delaymagic &= ~DM_RGID;
727 # endif /* HAS_SETRGID */
729 if ((delaymagic & DM_GID) == DM_EGID) {
731 delaymagic &= ~DM_EGID;
733 # endif /* HAS_SETEGID */
734 if (delaymagic & DM_GID) {
736 DIE("No setregid available");
739 # endif /* HAS_SETREGID */
740 #endif /* HAS_SETRESGID */
742 egid = (int)getegid();
744 tainting |= (uid && (euid != uid || egid != gid));
751 else if (gimme == G_SCALAR) {
754 SETi(lastrelem - firstrelem + 1);
760 SP = firstrelem + (lastlelem - firstlelem);
761 lelem = firstlelem + (relem - firstrelem);
763 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
771 register PMOP *pm = cPMOP;
778 register REGEXP *rx = pm->op_pmregexp;
782 I32 oldsave = savestack_ix;
783 I32 update_minmatch = 1;
785 if (op->op_flags & OPf_STACKED)
794 DIE("panic: do_match");
797 if (pm->op_pmflags & PMf_USED) {
798 if (gimme == G_ARRAY)
803 if (!rx->prelen && curpm) {
805 rx = pm->op_pmregexp;
808 if (global = pm->op_pmflags & PMf_GLOBAL) {
810 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
811 MAGIC* mg = mg_find(TARG, 'g');
812 if (mg && mg->mg_len >= 0) {
813 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
814 minmatch = (mg->mg_flags & MGf_MINMATCH);
819 if (!rx->nparens && !global)
820 gimme = G_SCALAR; /* accidental array context? */
821 safebase = (((gimme == G_ARRAY) || global || !rx->nparens)
823 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
825 multiline = pm->op_pmflags & PMf_MULTILINE;
829 if (global && rx->startp[0]) {
831 if ((s + rx->minlen) > strend)
833 if (update_minmatch++)
834 minmatch = (s == rx->startp[0]);
836 if (pm->op_pmshort) {
837 if (pm->op_pmflags & PMf_SCANFIRST) {
838 if (SvSCREAM(TARG)) {
839 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
841 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
843 else if (pm->op_pmflags & PMf_ALL)
846 else if (!(s = fbm_instr((unsigned char*)s,
847 (unsigned char*)strend, pm->op_pmshort)))
849 else if (pm->op_pmflags & PMf_ALL)
851 if (s && rx->regback >= 0) {
852 ++BmUSEFUL(pm->op_pmshort);
860 else if (!multiline) {
861 if (*SvPVX(pm->op_pmshort) != *s
862 || (pm->op_pmslen > 1
863 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
866 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
867 SvREFCNT_dec(pm->op_pmshort);
868 pm->op_pmshort = Nullsv; /* opt is being useless */
871 if (pregexec(rx, s, strend, truebase, minmatch,
872 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
875 if (pm->op_pmflags & PMf_ONCE)
876 pm->op_pmflags |= PMf_USED;
884 TAINT_IF(rx->exec_tainted);
885 if (gimme == G_ARRAY) {
889 if (global && !iters)
893 EXTEND(SP, iters + i);
894 EXTEND_MORTAL(iters + i);
895 for (i = !i; i <= iters; i++) {
896 PUSHs(sv_newmortal());
898 if ((s = rx->startp[i]) && rx->endp[i] ) {
899 len = rx->endp[i] - s;
900 sv_setpvn(*SP, s, len);
904 truebase = rx->subbeg;
906 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
910 LEAVE_SCOPE(oldsave);
916 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
917 mg = mg_find(TARG, 'g');
919 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
920 mg = mg_find(TARG, 'g');
923 mg->mg_len = rx->endp[0] - rx->subbeg;
924 if (rx->startp[0] == rx->endp[0])
925 mg->mg_flags |= MGf_MINMATCH;
927 mg->mg_flags &= ~MGf_MINMATCH;
930 LEAVE_SCOPE(oldsave);
935 TAINT_IF(rx->exec_tainted);
936 ++BmUSEFUL(pm->op_pmshort);
938 if (pm->op_pmflags & PMf_ONCE)
939 pm->op_pmflags |= PMf_USED;
940 Safefree(rx->subbase);
941 rx->subbase = Nullch;
943 rx->subbeg = truebase;
946 rx->endp[0] = s + SvCUR(pm->op_pmshort);
952 tmps = rx->subbase = savepvn(t, strend-t);
954 rx->subend = tmps + (strend-t);
955 tmps = rx->startp[0] = tmps + (s - t);
956 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
958 LEAVE_SCOPE(oldsave);
963 ++BmUSEFUL(pm->op_pmshort);
966 LEAVE_SCOPE(oldsave);
967 if (gimme == G_ARRAY)
980 register IO *io = GvIO(last_in_gv);
981 register I32 type = op->op_type;
985 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
990 perl_call_method("READLINE", gimme);
993 if (gimme == G_SCALAR)
994 SvSetMagicSV_nosteal(TARG, TOPs);
1001 if (IoFLAGS(io) & IOf_ARGV) {
1002 if (IoFLAGS(io) & IOf_START) {
1003 IoFLAGS(io) &= ~IOf_START;
1005 if (av_len(GvAVn(last_in_gv)) < 0) {
1006 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
1007 av_push(GvAVn(last_in_gv), tmpstr);
1010 fp = nextargv(last_in_gv);
1011 if (!fp) { /* Note: fp != IoIFP(io) */
1012 (void)do_close(last_in_gv, FALSE); /* now it does*/
1013 IoFLAGS(io) |= IOf_START;
1016 else if (type == OP_GLOB) {
1017 SV *tmpcmd = NEWSV(55, 0);
1021 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1022 /* since spawning off a process is a real performance hit */
1024 #include <descrip.h>
1025 #include <lib$routines.h>
1028 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1029 char vmsspec[NAM$C_MAXRSS+1];
1030 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1031 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1032 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1035 struct dsc$descriptor_s wilddsc
1036 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1037 struct dsc$descriptor_vs rsdsc
1038 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1039 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1041 /* We could find out if there's an explicit dev/dir or version
1042 by peeking into lib$find_file's internal context at
1043 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1044 but that's unsupported, so I don't want to do it now and
1045 have it bite someone in the future. */
1046 strcat(tmpfnam,tmpnam(NULL));
1047 cp = SvPV(tmpglob,i);
1049 if (cp[i] == ';') hasver = 1;
1051 if (sts) hasver = 1;
1055 hasdir = isunix = 1;
1058 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1063 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1064 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1065 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1066 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1067 &dfltdsc,NULL,NULL,NULL))&1)) {
1068 end = rstr + (unsigned long int) *rslt;
1069 if (!hasver) while (*end != ';') end--;
1070 *(end++) = '\n'; *end = '\0';
1071 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1073 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1078 while (*(--begin) != ']' && *begin != '>') ;
1081 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1083 if (cxt) (void)lib$find_file_end(&cxt);
1084 if (ok && sts != RMS$_NMF &&
1085 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1088 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1090 PerlIO_close(tmpfp);
1094 PerlIO_rewind(tmpfp);
1096 IoIFP(io) = fp = tmpfp;
1097 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
1104 sv_setpv(tmpcmd, "for a in ");
1105 sv_catsv(tmpcmd, tmpglob);
1106 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1108 sv_setpv(tmpcmd, "perlglob ");
1109 sv_catsv(tmpcmd, tmpglob);
1110 sv_catpv(tmpcmd, " |");
1114 sv_setpvn(tmpcmd, cshname, cshlen);
1115 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1116 sv_catsv(tmpcmd, tmpglob);
1117 sv_catpv(tmpcmd, "' 2>/dev/null |");
1119 sv_setpv(tmpcmd, "echo ");
1120 sv_catsv(tmpcmd, tmpglob);
1122 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1124 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1127 #endif /* !DOSISH */
1128 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1129 FALSE, 0, 0, Nullfp);
1135 else if (type == OP_GLOB)
1139 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1140 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1141 if (gimme == G_SCALAR) {
1142 (void)SvOK_off(TARG);
1147 if (gimme == G_SCALAR) {
1151 (void)SvUPGRADE(sv, SVt_PV);
1152 tmplen = SvLEN(sv); /* remember if already alloced */
1154 Sv_Grow(sv, 80); /* try short-buffering it */
1155 if (type == OP_RCATLINE)
1161 sv = sv_2mortal(NEWSV(57, 80));
1165 if (!sv_gets(sv, fp, offset)) {
1166 PerlIO_clearerr(fp);
1167 if (IoFLAGS(io) & IOf_ARGV) {
1168 fp = nextargv(last_in_gv);
1171 (void)do_close(last_in_gv, FALSE);
1172 IoFLAGS(io) |= IOf_START;
1174 else if (type == OP_GLOB) {
1175 if (do_close(last_in_gv, FALSE) & ~0xFF)
1176 warn("internal error: glob failed");
1178 if (gimme == G_SCALAR) {
1179 (void)SvOK_off(TARG);
1184 /* This should not be marked tainted if the fp is marked clean */
1185 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1192 if (type == OP_GLOB) {
1195 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1196 tmps = SvEND(sv) - 1;
1197 if (*tmps == *SvPVX(rs)) {
1202 for (tmps = SvPVX(sv); *tmps; tmps++)
1203 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1204 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1206 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1207 (void)POPs; /* Unmatched wildcard? Chuck it... */
1211 if (gimme == G_ARRAY) {
1212 if (SvLEN(sv) - SvCUR(sv) > 20) {
1213 SvLEN_set(sv, SvCUR(sv)+1);
1214 Renew(SvPVX(sv), SvLEN(sv), char);
1216 sv = sv_2mortal(NEWSV(58, 80));
1219 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1220 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1224 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1225 Renew(SvPVX(sv), SvLEN(sv), char);
1234 register CONTEXT *cx;
1235 I32 gimme = OP_GIMME(op, -1);
1238 if (cxstack_ix >= 0)
1239 gimme = cxstack[cxstack_ix].blk_gimme;
1247 PUSHBLOCK(cx, CXt_BLOCK, sp);
1258 U32 lval = op->op_flags & OPf_MOD;
1259 U32 defer = op->op_private & OPpLVAL_DEFER;
1261 if (SvTYPE(hv) != SVt_PVHV)
1263 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
1265 if (!he || HeVAL(he) == &sv_undef) {
1269 DIE(no_helem, SvPV(keysv, na));
1270 lv = sv_newmortal();
1271 sv_upgrade(lv, SVt_PVLV);
1273 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1274 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1275 LvTARG(lv) = SvREFCNT_inc(hv);
1280 if (op->op_private & OPpLVAL_INTRO) {
1281 if (HvNAME(hv) && isGV(HeVAL(he)))
1282 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1284 save_svref(&HeVAL(he));
1286 else if (op->op_private & OPpDEREF)
1287 vivify_ref(HeVAL(he), op->op_private & OPpDEREF);
1289 PUSHs(he ? HeVAL(he) : &sv_undef);
1296 register CONTEXT *cx;
1302 if (op->op_flags & OPf_SPECIAL) {
1303 cx = &cxstack[cxstack_ix];
1304 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1309 gimme = OP_GIMME(op, -1);
1311 if (cxstack_ix >= 0)
1312 gimme = cxstack[cxstack_ix].blk_gimme;
1317 if (gimme == G_VOID)
1319 else if (gimme == G_SCALAR) {
1322 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1325 *MARK = sv_mortalcopy(TOPs);
1332 else if (gimme == G_ARRAY) {
1333 for (mark = newsp + 1; mark <= SP; mark++)
1334 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1335 *mark = sv_mortalcopy(*mark);
1336 /* in case LEAVE wipes old return values */
1338 curpm = newpm; /* Don't pop $1 et al till now */
1348 register CONTEXT *cx;
1353 cx = &cxstack[cxstack_ix];
1354 if (cx->cx_type != CXt_LOOP)
1355 DIE("panic: pp_iter");
1357 av = cx->blk_loop.iterary;
1358 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1361 SvREFCNT_dec(*cx->blk_loop.itervar);
1363 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1367 if (av != curstack && SvIMMORTAL(sv)) {
1368 SV *lv = cx->blk_loop.iterlval;
1369 if (lv && SvREFCNT(lv) > 1) {
1374 SvREFCNT_dec(LvTARG(lv));
1376 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
1377 sv_upgrade(lv, SVt_PVLV);
1379 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1381 LvTARG(lv) = SvREFCNT_inc(av);
1382 LvTARGOFF(lv) = cx->blk_loop.iterix;
1387 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1394 register PMOP *pm = cPMOP;
1410 register REGEXP *rx = pm->op_pmregexp;
1412 int force_on_match = 0;
1413 I32 oldsave = savestack_ix;
1415 /* known replacement string? */
1416 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
1417 if (op->op_flags & OPf_STACKED)
1423 if (SvREADONLY(TARG)
1424 || (SvTYPE(TARG) > SVt_PVLV
1425 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1427 s = SvPV(TARG, len);
1428 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
1434 DIE("panic: do_subst");
1437 maxiters = (strend - s) + 10;
1439 if (!rx->prelen && curpm) {
1441 rx = pm->op_pmregexp;
1443 safebase = (!rx->nparens && !sawampersand);
1444 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1446 multiline = pm->op_pmflags & PMf_MULTILINE;
1449 if (pm->op_pmshort) {
1450 if (pm->op_pmflags & PMf_SCANFIRST) {
1451 if (SvSCREAM(TARG)) {
1452 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1454 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1457 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1460 if (s && rx->regback >= 0) {
1461 ++BmUSEFUL(pm->op_pmshort);
1469 else if (!multiline) {
1470 if (*SvPVX(pm->op_pmshort) != *s
1471 || (pm->op_pmslen > 1
1472 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1475 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1476 SvREFCNT_dec(pm->op_pmshort);
1477 pm->op_pmshort = Nullsv; /* opt is being useless */
1481 /* only replace once? */
1482 once = !(rpm->op_pmflags & PMf_GLOBAL);
1484 /* known replacement string? */
1485 c = dstr ? SvPV(dstr, clen) : Nullch;
1487 /* can do inplace substitution? */
1488 if (c && clen <= rx->minlen && safebase) {
1489 if (! pregexec(rx, s, strend, orig, 0,
1490 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1492 LEAVE_SCOPE(oldsave);
1495 if (force_on_match) {
1497 s = SvPV_force(TARG, len);
1502 SvSCREAM_off(TARG); /* disable possible screamer */
1504 rxtainted = rx->exec_tainted;
1508 if (m - s > strend - d) { /* faster to shorten from end */
1510 Copy(c, m, clen, char);
1515 Move(d, m, i, char);
1519 SvCUR_set(TARG, m - s);
1522 else if (i = m - s) { /* faster from front */
1530 Copy(c, m, clen, char);
1535 Copy(c, d, clen, char);
1540 TAINT_IF(rxtainted);
1546 if (iters++ > maxiters)
1547 DIE("Substitution loop");
1548 rxtainted |= rx->exec_tainted;
1553 Move(s, d, i, char);
1557 Copy(c, d, clen, char);
1561 } while (pregexec(rx, s, strend, orig, s == m,
1562 Nullsv, TRUE)); /* don't match same null twice */
1565 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1566 Move(s, d, i+1, char); /* include the NUL */
1568 TAINT_IF(rxtainted);
1569 PUSHs(sv_2mortal(newSViv((I32)iters)));
1571 (void)SvPOK_only(TARG);
1574 LEAVE_SCOPE(oldsave);
1578 if (pregexec(rx, s, strend, orig, 0,
1579 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1580 if (force_on_match) {
1582 s = SvPV_force(TARG, len);
1585 rxtainted = rx->exec_tainted;
1586 dstr = NEWSV(25, sv_len(TARG));
1587 sv_setpvn(dstr, m, s-m);
1590 register CONTEXT *cx;
1592 RETURNOP(cPMOP->op_pmreplroot);
1595 if (iters++ > maxiters)
1596 DIE("Substitution loop");
1597 rxtainted |= rx->exec_tainted;
1598 if (rx->subbase && rx->subbase != orig) {
1603 strend = s + (strend - m);
1606 sv_catpvn(dstr, s, m-s);
1609 sv_catpvn(dstr, c, clen);
1612 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1613 sv_catpvn(dstr, s, strend - s);
1615 TAINT_IF(rxtainted);
1617 (void)SvOOK_off(TARG);
1618 Safefree(SvPVX(TARG));
1619 SvPVX(TARG) = SvPVX(dstr);
1620 SvCUR_set(TARG, SvCUR(dstr));
1621 SvLEN_set(TARG, SvLEN(dstr));
1625 (void)SvPOK_only(TARG);
1628 PUSHs(sv_2mortal(newSViv((I32)iters)));
1629 LEAVE_SCOPE(oldsave);
1635 ++BmUSEFUL(pm->op_pmshort);
1639 LEAVE_SCOPE(oldsave);
1648 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1650 LEAVE; /* exit inner scope */
1653 if (stack_base + *markstack_ptr > sp) {
1655 I32 gimme = GIMME_V;
1657 LEAVE; /* exit outer scope */
1658 (void)POPMARK; /* pop src */
1659 items = --*markstack_ptr - markstack_ptr[-1];
1660 (void)POPMARK; /* pop dst */
1661 SP = stack_base + POPMARK; /* pop original mark */
1662 if (gimme == G_SCALAR) {
1666 else if (gimme == G_ARRAY)
1673 ENTER; /* enter inner scope */
1676 src = stack_base[*markstack_ptr];
1680 RETURNOP(cLOGOP->op_other);
1691 register CONTEXT *cx;
1692 struct block_sub cxsub;
1695 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1697 if (gimme == G_SCALAR) {
1700 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1707 else if (gimme == G_ARRAY) {
1708 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1710 *MARK = sv_mortalcopy(*MARK);
1715 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1716 curpm = newpm; /* ... and pop $1 et al */
1719 return pop_return();
1728 register CONTEXT *cx;
1730 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1733 DIE("Not a CODE reference");
1734 switch (SvTYPE(sv)) {
1739 if (sv == &sv_yes) /* unfound import, ignore */
1741 if (SvGMAGICAL(sv)) {
1743 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1748 DIE(no_usym, "a subroutine");
1749 if (op->op_private & HINT_STRICT_REFS)
1750 DIE(no_symref, sym, "a subroutine");
1751 cv = perl_get_cv(sym, TRUE);
1755 if (SvTYPE(cv) == SVt_PVCV)
1760 DIE("Not a CODE reference");
1765 if (!(cv = GvCVu((GV*)sv)))
1766 cv = sv_2cv(sv, &stash, &gv, TRUE);
1775 DIE("Not a CODE reference");
1777 if (!CvROOT(cv) && !CvXSUB(cv)) {
1781 /* anonymous or undef'd function leaves us no recourse */
1782 if (CvANON(cv) || !(gv = CvGV(cv)))
1783 DIE("Undefined subroutine called");
1784 /* autoloaded stub? */
1785 if (cv != GvCV(gv)) {
1789 /* should call AUTOLOAD now? */
1790 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1797 subname = sv_newmortal();
1798 gv_efullname3(subname, gv, Nullch);
1799 DIE("Undefined subroutine &%s called", SvPVX(subname));
1803 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1808 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1809 || strEQ(GvNAME(gv), "END")
1810 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1811 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1812 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1813 /* GV is potentially non-unique, or contain different CV. */
1814 sv_setsv(sv, newRV((SV*)cv));
1817 gv_efullname3(sv, gv, Nullch);
1820 if (CvXSUB(cv)) curcopdb = curcop;
1822 DIE("No DBsub routine");
1826 if (CvOLDSTYLE(cv)) {
1827 I32 (*fp3)_((int,int,int));
1829 register I32 items = SP - MARK;
1830 /* We dont worry to copy from @_. */
1835 stack_sp = mark + 1;
1836 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1837 items = (*fp3)(CvXSUBANY(cv).any_i32,
1838 MARK - stack_base + 1,
1840 stack_sp = stack_base + items;
1843 I32 markix = TOPMARK;
1848 /* Need to copy @_ to stack. Alternative may be to
1849 * switch stack to @_, and copy return values
1850 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1851 AV* av = GvAV(defgv);
1852 I32 items = AvFILL(av) + 1;
1855 /* Mark is at the end of the stack. */
1857 Copy(AvARRAY(av), sp + 1, items, SV*);
1862 if (curcopdb) { /* We assume that the first
1863 XSUB in &DB::sub is the
1869 /* Do we need to open block here? XXXX */
1870 (void)(*CvXSUB(cv))(cv);
1872 /* Enforce some sanity in scalar context. */
1873 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1874 if (markix > stack_sp - stack_base)
1875 *(stack_base + markix) = &sv_undef;
1877 *(stack_base + markix) = *stack_sp;
1878 stack_sp = stack_base + markix;
1886 register I32 items = SP - MARK;
1887 AV* padlist = CvPADLIST(cv);
1888 SV** svp = AvARRAY(padlist);
1889 push_return(op->op_next);
1890 PUSHBLOCK(cx, CXt_SUB, MARK);
1893 if (CvDEPTH(cv) < 2)
1894 (void)SvREFCNT_inc(cv);
1895 else { /* save temporaries on recursion? */
1896 if (CvDEPTH(cv) == 100 && dowarn
1897 && !(perldb && cv == GvCV(DBsub)))
1898 sub_crush_depth(cv);
1899 if (CvDEPTH(cv) > AvFILL(padlist)) {
1901 AV *newpad = newAV();
1902 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1903 I32 ix = AvFILL((AV*)svp[1]);
1904 svp = AvARRAY(svp[0]);
1905 for ( ;ix > 0; ix--) {
1906 if (svp[ix] != &sv_undef) {
1907 char *name = SvPVX(svp[ix]);
1908 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1909 || *name == '&') /* anonymous code? */
1911 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1913 else { /* our own lexical */
1915 av_store(newpad, ix, sv = (SV*)newAV());
1916 else if (*name == '%')
1917 av_store(newpad, ix, sv = (SV*)newHV());
1919 av_store(newpad, ix, sv = NEWSV(0,0));
1924 av_store(newpad, ix, sv = NEWSV(0,0));
1928 av = newAV(); /* will be @_ */
1930 av_store(newpad, 0, (SV*)av);
1931 AvFLAGS(av) = AVf_REIFY;
1932 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1933 AvFILL(padlist) = CvDEPTH(cv);
1934 svp = AvARRAY(padlist);
1938 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1940 AV* av = (AV*)curpad[0];
1947 cx->blk_sub.savearray = GvAV(defgv);
1948 cx->blk_sub.argarray = av;
1949 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1952 if (items > AvMAX(av) + 1) {
1954 if (AvARRAY(av) != ary) {
1955 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1956 SvPVX(av) = (char*)ary;
1958 if (items > AvMAX(av) + 1) {
1959 AvMAX(av) = items - 1;
1960 Renew(ary,items,SV*);
1962 SvPVX(av) = (char*)ary;
1965 Copy(MARK,AvARRAY(av),items,SV*);
1966 AvFILL(av) = items - 1;
1974 RETURNOP(CvSTART(cv));
1983 warn("Deep recursion on anonymous subroutine");
1985 SV* tmpstr = sv_newmortal();
1986 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1987 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
1997 U32 lval = op->op_flags & OPf_MOD;
1998 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
2001 elem -= curcop->cop_arybase;
2002 if (SvTYPE(av) != SVt_PVAV)
2004 svp = av_fetch(av, elem, lval && !defer);
2006 if (!svp || *svp == &sv_undef) {
2009 DIE(no_aelem, elem);
2010 lv = sv_newmortal();
2011 sv_upgrade(lv, SVt_PVLV);
2013 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2014 LvTARG(lv) = SvREFCNT_inc(av);
2015 LvTARGOFF(lv) = elem;
2020 if (op->op_private & OPpLVAL_INTRO)
2022 else if (op->op_private & OPpDEREF)
2023 vivify_ref(*svp, op->op_private & OPpDEREF);
2025 PUSHs(svp ? *svp : &sv_undef);
2030 vivify_ref(sv, to_what)
2039 if (SvTYPE(sv) < SVt_RV)
2040 sv_upgrade(sv, SVt_RV);
2041 else if (SvTYPE(sv) >= SVt_PV) {
2042 (void)SvOOK_off(sv);
2043 Safefree(SvPVX(sv));
2044 SvLEN(sv) = SvCUR(sv) = 0;
2048 SvRV(sv) = newSV(0);
2051 SvRV(sv) = (SV*)newAV();
2054 SvRV(sv) = (SV*)newHV();
2071 sv = *(stack_base + TOPMARK + 1);
2084 !(packname = SvPV(sv, packlen)) ||
2085 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2086 !(ob=(SV*)GvIO(iogv)))
2088 char *name = SvPV(nm, na);
2090 if (!packname || !isALPHA(*packname))
2091 DIE("Can't call method \"%s\" without a package or object reference", name);
2092 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2093 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2094 stash = gv_stashpvn(packname, packlen, TRUE);
2096 DIE("Can't call method \"%s\" in empty package \"%s\"",
2099 gv = gv_fetchmethod(stash,name);
2101 DIE("Can't locate object method \"%s\" via package \"%s\"",
2103 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
2106 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2109 if (!ob || !SvOBJECT(ob)) {
2110 char *name = SvPV(nm, na);
2111 DIE("Can't call method \"%s\" on unblessed reference", name);
2114 if (!gv) { /* nothing cached */
2115 char *name = SvPV(nm, na);
2116 gv = gv_fetchmethod(SvSTASH(ob),name);
2118 DIE("Can't locate object method \"%s\" via package \"%s\"",
2119 name, HvNAME(SvSTASH(ob)));
2122 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);