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"))
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 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) && SvTYPE(TARG) <= SVt_PVMG) {
203 sv_setpv(TARG, ""); /* Suppress warning. */
204 s = SvPV_force(TARG, len);
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)
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 (SvREADONLY(TOPs))
247 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
248 SvIVX(TOPs) != IV_MAX)
251 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
266 RETURNOP(cLOGOP->op_other);
272 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
275 SETn( left + right );
283 AV *av = GvAV((GV*)cSVOP->op_sv);
284 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
285 PUSHs(svp ? *svp : &sv_undef);
293 do_join(TARG, *MARK, MARK, SP);
304 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
305 * will be enough to hold an OP*.
307 SV* sv = sv_newmortal();
308 sv_upgrade(sv, SVt_PVLV);
310 Copy(&op, &LvTARGOFF(sv), 1, OP*);
318 /* Oversized hot code. */
322 dSP; dMARK; dORIGMARK;
328 if (op->op_flags & OPf_STACKED)
332 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
338 perl_call_method("PRINT", G_SCALAR);
346 if (!(io = GvIO(gv))) {
348 SV* sv = sv_newmortal();
349 gv_fullname3(sv, gv, Nullch);
350 warn("Filehandle %s never opened", SvPV(sv,na));
353 SETERRNO(EBADF,RMS$_IFI);
356 else if (!(fp = IoOFP(io))) {
358 SV* sv = sv_newmortal();
359 gv_fullname3(sv, gv, Nullch);
361 warn("Filehandle %s opened only for input", SvPV(sv,na));
363 warn("print on closed filehandle %s", SvPV(sv,na));
365 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
372 if (!do_print(*MARK, fp))
376 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
385 if (!do_print(*MARK, fp))
394 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
397 if (IoFLAGS(io) & IOf_FLUSH)
398 if (PerlIO_flush(fp) == EOF)
421 if (SvTYPE(av) != SVt_PVAV)
422 DIE("Not an ARRAY reference");
423 if (op->op_private & OPpLVAL_INTRO)
424 av = (AV*)save_svref((SV**)sv);
425 if (op->op_flags & OPf_REF) {
431 if (SvTYPE(sv) == SVt_PVAV) {
433 if (op->op_flags & OPf_REF) {
441 if (SvTYPE(sv) != SVt_PVGV) {
444 if (SvGMAGICAL(sv)) {
450 if (op->op_flags & OPf_REF ||
451 op->op_private & HINT_STRICT_REFS)
452 DIE(no_usym, "an ARRAY");
453 if (GIMME == G_ARRAY)
458 if (op->op_private & HINT_STRICT_REFS)
459 DIE(no_symref, sym, "an ARRAY");
460 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
465 if (op->op_private & OPpLVAL_INTRO)
467 if (op->op_flags & OPf_REF) {
474 if (GIMME == G_ARRAY) {
475 I32 maxarg = AvFILL(av) + 1;
477 Copy(AvARRAY(av), SP+1, maxarg, SV*);
482 I32 maxarg = AvFILL(av) + 1;
498 if (SvTYPE(hv) != SVt_PVHV)
499 DIE("Not a HASH reference");
500 if (op->op_private & OPpLVAL_INTRO)
501 hv = (HV*)save_svref((SV**)sv);
502 if (op->op_flags & OPf_REF) {
508 if (SvTYPE(sv) == SVt_PVHV) {
510 if (op->op_flags & OPf_REF) {
518 if (SvTYPE(sv) != SVt_PVGV) {
521 if (SvGMAGICAL(sv)) {
527 if (op->op_flags & OPf_REF ||
528 op->op_private & HINT_STRICT_REFS)
529 DIE(no_usym, "a HASH");
530 if (GIMME == G_ARRAY) {
537 if (op->op_private & HINT_STRICT_REFS)
538 DIE(no_symref, sym, "a HASH");
539 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
544 if (op->op_private & OPpLVAL_INTRO)
546 if (op->op_flags & OPf_REF) {
553 if (GIMME == G_ARRAY) { /* array wanted */
560 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
573 SV **lastlelem = stack_sp;
574 SV **lastrelem = stack_base + POPMARK;
575 SV **firstrelem = stack_base + POPMARK + 1;
576 SV **firstlelem = lastrelem + 1;
588 delaymagic = DM_DELAY; /* catch simultaneous items */
590 /* If there's a common identifier on both sides we have to take
591 * special care that assigning the identifier on the left doesn't
592 * clobber a value on the right that's used later in the list.
594 if (op->op_private & OPpASSIGN_COMMON) {
595 for (relem = firstrelem; relem <= lastrelem; relem++) {
598 *relem = sv_mortalcopy(sv);
606 while (lelem <= lastlelem) {
607 TAINT_NOT; /* Each item stands on its own, taintwise. */
609 switch (SvTYPE(sv)) {
612 magic = SvMAGICAL(ary) != 0;
615 av_extend(ary, lastrelem - relem);
617 while (relem <= lastrelem) { /* gobble up all the rest */
622 (void)av_store(ary,i++,sv);
632 magic = SvMAGICAL(hash) != 0;
635 while (relem < lastrelem) { /* gobble up all the rest */
640 sv = &sv_no, relem++;
641 tmpstr = NEWSV(29,0);
643 sv_setsv(tmpstr,*relem); /* value */
645 (void)hv_store_ent(hash,sv,tmpstr,0);
650 if (relem == lastrelem)
651 warn("Odd number of elements in hash list");
655 if (SvTHINKFIRST(sv)) {
656 if (SvREADONLY(sv) && curcop != &compiling) {
657 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
659 if (relem <= lastrelem)
666 if (relem <= lastrelem) {
667 sv_setsv(sv, *relem);
671 sv_setsv(sv, &sv_undef);
676 if (delaymagic & ~DM_DELAY) {
677 if (delaymagic & DM_UID) {
679 (void)setresuid(uid,euid,(Uid_t)-1);
682 (void)setreuid(uid,euid);
685 if ((delaymagic & DM_UID) == DM_RUID) {
687 delaymagic &= ~DM_RUID;
689 # endif /* HAS_SETRUID */
691 if ((delaymagic & DM_UID) == DM_EUID) {
693 delaymagic &= ~DM_EUID;
695 # endif /* HAS_SETEUID */
696 if (delaymagic & DM_UID) {
698 DIE("No setreuid available");
701 # endif /* HAS_SETREUID */
702 #endif /* HAS_SETRESUID */
704 euid = (int)geteuid();
706 if (delaymagic & DM_GID) {
708 (void)setresgid(gid,egid,(Gid_t)-1);
711 (void)setregid(gid,egid);
714 if ((delaymagic & DM_GID) == DM_RGID) {
716 delaymagic &= ~DM_RGID;
718 # endif /* HAS_SETRGID */
720 if ((delaymagic & DM_GID) == DM_EGID) {
722 delaymagic &= ~DM_EGID;
724 # endif /* HAS_SETEGID */
725 if (delaymagic & DM_GID) {
727 DIE("No setregid available");
730 # endif /* HAS_SETREGID */
731 #endif /* HAS_SETRESGID */
733 egid = (int)getegid();
735 tainting |= (uid && (euid != uid || egid != gid));
738 if (GIMME == G_ARRAY) {
742 SP = firstrelem + (lastlelem - firstlelem);
743 lelem = firstlelem + (relem - firstrelem);
745 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
752 SETi(lastrelem - firstrelem + 1);
760 register PMOP *pm = cPMOP;
767 register REGEXP *rx = pm->op_pmregexp;
771 I32 oldsave = savestack_ix;
772 I32 update_minmatch = 1;
774 if (op->op_flags & OPf_STACKED)
783 DIE("panic: do_match");
785 if (pm->op_pmflags & PMf_USED) {
786 if (gimme == G_ARRAY)
791 if (!rx->prelen && curpm) {
793 rx = pm->op_pmregexp;
796 if (global = pm->op_pmflags & PMf_GLOBAL) {
798 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
799 MAGIC* mg = mg_find(TARG, 'g');
800 if (mg && mg->mg_len >= 0) {
801 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
802 minmatch = (mg->mg_flags & MGf_MINMATCH);
807 if (!rx->nparens && !global)
808 gimme = G_SCALAR; /* accidental array context? */
809 safebase = (((gimme == G_ARRAY) || global) && !sawampersand);
810 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
812 multiline = pm->op_pmflags & PMf_MULTILINE;
816 if (global && rx->startp[0]) {
820 if (update_minmatch++)
821 minmatch = (s == rx->startp[0]);
823 if (pm->op_pmshort) {
824 if (pm->op_pmflags & PMf_SCANFIRST) {
825 if (SvSCREAM(TARG)) {
826 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
828 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
830 else if (pm->op_pmflags & PMf_ALL)
833 else if (!(s = fbm_instr((unsigned char*)s,
834 (unsigned char*)strend, pm->op_pmshort)))
836 else if (pm->op_pmflags & PMf_ALL)
838 if (s && rx->regback >= 0) {
839 ++BmUSEFUL(pm->op_pmshort);
847 else if (!multiline) {
848 if (*SvPVX(pm->op_pmshort) != *s
849 || (pm->op_pmslen > 1
850 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
853 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
854 SvREFCNT_dec(pm->op_pmshort);
855 pm->op_pmshort = Nullsv; /* opt is being useless */
858 if (pregexec(rx, s, strend, truebase, minmatch,
859 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
862 if (pm->op_pmflags & PMf_ONCE)
863 pm->op_pmflags |= PMf_USED;
871 if (gimme == G_ARRAY) {
874 TAINT_IF(rx->exec_tainted);
876 if (global && !iters)
880 EXTEND(SP, iters + i);
881 EXTEND_MORTAL(iters + i);
882 for (i = !i; i <= iters; i++) {
883 PUSHs(sv_newmortal());
885 if ((s = rx->startp[i]) && rx->endp[i] ) {
886 len = rx->endp[i] - s;
887 sv_setpvn(*SP, s, len);
891 truebase = rx->subbeg;
893 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
897 LEAVE_SCOPE(oldsave);
903 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
904 mg = mg_find(TARG, 'g');
906 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
907 mg = mg_find(TARG, 'g');
910 mg->mg_len = rx->endp[0] - rx->subbeg;
911 if (rx->startp[0] == rx->endp[0])
912 mg->mg_flags |= MGf_MINMATCH;
914 mg->mg_flags &= ~MGf_MINMATCH;
917 LEAVE_SCOPE(oldsave);
922 ++BmUSEFUL(pm->op_pmshort);
924 if (pm->op_pmflags & PMf_ONCE)
925 pm->op_pmflags |= PMf_USED;
926 Safefree(rx->subbase);
927 rx->subbase = Nullch;
929 rx->subbeg = truebase;
932 rx->endp[0] = s + SvCUR(pm->op_pmshort);
938 tmps = rx->subbase = savepvn(t, strend-t);
940 rx->subend = tmps + (strend-t);
941 tmps = rx->startp[0] = tmps + (s - t);
942 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
944 LEAVE_SCOPE(oldsave);
949 ++BmUSEFUL(pm->op_pmshort);
952 LEAVE_SCOPE(oldsave);
953 if (gimme == G_ARRAY)
966 register IO *io = GvIO(last_in_gv);
967 register I32 type = op->op_type;
970 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
975 perl_call_method("READLINE", GIMME);
978 if (GIMME == G_SCALAR)
979 SvSetSV_nosteal(TARG, TOPs);
986 if (IoFLAGS(io) & IOf_ARGV) {
987 if (IoFLAGS(io) & IOf_START) {
988 IoFLAGS(io) &= ~IOf_START;
990 if (av_len(GvAVn(last_in_gv)) < 0) {
991 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
992 av_push(GvAVn(last_in_gv), tmpstr);
995 fp = nextargv(last_in_gv);
996 if (!fp) { /* Note: fp != IoIFP(io) */
997 (void)do_close(last_in_gv, FALSE); /* now it does*/
998 IoFLAGS(io) |= IOf_START;
1001 else if (type == OP_GLOB) {
1002 SV *tmpcmd = NEWSV(55, 0);
1006 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1007 /* since spawning off a process is a real performance hit */
1009 #include <descrip.h>
1010 #include <lib$routines.h>
1013 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1014 char vmsspec[NAM$C_MAXRSS+1];
1015 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1016 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1017 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1020 struct dsc$descriptor_s wilddsc
1021 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1022 struct dsc$descriptor_vs rsdsc
1023 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1024 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1026 /* We could find out if there's an explicit dev/dir or version
1027 by peeking into lib$find_file's internal context at
1028 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1029 but that's unsupported, so I don't want to do it now and
1030 have it bite someone in the future. */
1031 strcat(tmpfnam,tmpnam(NULL));
1032 cp = SvPV(tmpglob,i);
1034 if (cp[i] == ';') hasver = 1;
1036 if (sts) hasver = 1;
1040 hasdir = isunix = 1;
1043 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1048 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1049 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1050 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1051 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1052 &dfltdsc,NULL,NULL,NULL))&1)) {
1053 end = rstr + (unsigned long int) *rslt;
1054 if (!hasver) while (*end != ';') end--;
1055 *(end++) = '\n'; *end = '\0';
1056 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1058 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1063 while (*(--begin) != ']' && *begin != '>') ;
1066 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1068 if (cxt) (void)lib$find_file_end(&cxt);
1069 if (ok && sts != RMS$_NMF &&
1070 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1073 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1075 PerlIO_close(tmpfp);
1079 PerlIO_rewind(tmpfp);
1081 IoIFP(io) = fp = tmpfp;
1088 sv_setpv(tmpcmd, "for a in ");
1089 sv_catsv(tmpcmd, tmpglob);
1090 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1092 sv_setpv(tmpcmd, "perlglob ");
1093 sv_catsv(tmpcmd, tmpglob);
1094 sv_catpv(tmpcmd, " |");
1098 sv_setpvn(tmpcmd, cshname, cshlen);
1099 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1100 sv_catsv(tmpcmd, tmpglob);
1101 sv_catpv(tmpcmd, "' 2>/dev/null |");
1103 sv_setpv(tmpcmd, "echo ");
1104 sv_catsv(tmpcmd, tmpglob);
1106 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1108 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1111 #endif /* !DOSISH */
1112 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1113 FALSE, 0, 0, Nullfp);
1119 else if (type == OP_GLOB)
1123 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1124 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1125 if (GIMME == G_SCALAR) {
1126 (void)SvOK_off(TARG);
1131 if (GIMME == G_ARRAY) {
1132 sv = sv_2mortal(NEWSV(57, 80));
1137 (void)SvUPGRADE(sv, SVt_PV);
1138 tmplen = SvLEN(sv); /* remember if already alloced */
1140 Sv_Grow(sv, 80); /* try short-buffering it */
1141 if (type == OP_RCATLINE)
1147 if (!sv_gets(sv, fp, offset)) {
1148 PerlIO_clearerr(fp);
1149 if (IoFLAGS(io) & IOf_ARGV) {
1150 fp = nextargv(last_in_gv);
1153 (void)do_close(last_in_gv, FALSE);
1154 IoFLAGS(io) |= IOf_START;
1156 else if (type == OP_GLOB) {
1157 (void)do_close(last_in_gv, FALSE);
1159 if (GIMME == G_SCALAR) {
1160 (void)SvOK_off(TARG);
1165 /* This should not be marked tainted if the fp is marked clean */
1166 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1173 if (type == OP_GLOB) {
1176 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1177 tmps = SvEND(sv) - 1;
1178 if (*tmps == *SvPVX(rs)) {
1183 for (tmps = SvPVX(sv); *tmps; tmps++)
1184 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1185 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1187 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1188 (void)POPs; /* Unmatched wildcard? Chuck it... */
1192 if (GIMME == G_ARRAY) {
1193 if (SvLEN(sv) - SvCUR(sv) > 20) {
1194 SvLEN_set(sv, SvCUR(sv)+1);
1195 Renew(SvPVX(sv), SvLEN(sv), char);
1197 sv = sv_2mortal(NEWSV(58, 80));
1200 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1201 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1205 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1206 Renew(SvPVX(sv), SvLEN(sv), char);
1215 register CONTEXT *cx;
1219 * We don't just use the GIMME macro here because it assumes there's
1220 * already a context, which ain't necessarily so at initial startup.
1223 if (op->op_flags & OPf_KNOW)
1224 gimme = op->op_flags & OPf_LIST;
1225 else if (cxstack_ix >= 0)
1226 gimme = cxstack[cxstack_ix].blk_gimme;
1233 PUSHBLOCK(cx, CXt_BLOCK, sp);
1244 I32 lval = op->op_flags & OPf_MOD;
1246 if (SvTYPE(hv) != SVt_PVHV)
1248 he = hv_fetch_ent(hv, keysv, lval, 0);
1250 if (!he || HeVAL(he) == &sv_undef)
1251 DIE(no_helem, SvPV(keysv, na));
1252 if (op->op_private & OPpLVAL_INTRO) {
1253 if (HvNAME(hv) && isGV(HeVAL(he)))
1254 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1256 save_svref(&HeVAL(he));
1258 else if (op->op_private & OPpDEREF)
1259 provide_ref(op, HeVAL(he));
1261 PUSHs(he ? HeVAL(he) : &sv_undef);
1268 register CONTEXT *cx;
1274 if (op->op_flags & OPf_SPECIAL) {
1275 cx = &cxstack[cxstack_ix];
1276 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1281 if (op->op_flags & OPf_KNOW)
1282 gimme = op->op_flags & OPf_LIST;
1283 else if (cxstack_ix >= 0)
1284 gimme = cxstack[cxstack_ix].blk_gimme;
1288 if (gimme == G_SCALAR) {
1289 if (op->op_private & OPpLEAVE_VOID)
1294 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1297 *MARK = sv_mortalcopy(TOPs);
1306 for (mark = newsp + 1; mark <= SP; mark++)
1307 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1308 *mark = sv_mortalcopy(*mark);
1309 /* in case LEAVE wipes old return values */
1311 curpm = newpm; /* Don't pop $1 et al till now */
1321 register CONTEXT *cx;
1326 cx = &cxstack[cxstack_ix];
1327 if (cx->cx_type != CXt_LOOP)
1328 DIE("panic: pp_iter");
1330 av = cx->blk_loop.iterary;
1331 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1334 SvREFCNT_dec(*cx->blk_loop.itervar);
1336 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1340 if (av != curstack && SvIMMORTAL(sv)) {
1341 SV *lv = cx->blk_loop.iterlval;
1342 if (lv && SvREFCNT(lv) > 1) {
1347 SvREFCNT_dec(LvTARG(lv));
1349 lv = cx->blk_loop.iterlval = newSVsv(sv);
1350 sv_upgrade(lv, SVt_PVLV);
1351 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1354 LvTARG(lv) = SvREFCNT_inc(av);
1355 LvTARGOFF(lv) = cx->blk_loop.iterix;
1360 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1367 register PMOP *pm = cPMOP;
1383 register REGEXP *rx = pm->op_pmregexp;
1385 int force_on_match = 0;
1386 I32 oldsave = savestack_ix;
1388 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1390 if (op->op_flags & OPf_STACKED)
1396 s = SvPV(TARG, len);
1397 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1402 DIE("panic: do_subst");
1405 maxiters = (strend - s) + 10;
1407 if (!rx->prelen && curpm) {
1409 rx = pm->op_pmregexp;
1411 safebase = (!rx->nparens && !sawampersand);
1412 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1414 multiline = pm->op_pmflags & PMf_MULTILINE;
1417 if (pm->op_pmshort) {
1418 if (pm->op_pmflags & PMf_SCANFIRST) {
1419 if (SvSCREAM(TARG)) {
1420 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1422 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1425 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1428 if (s && rx->regback >= 0) {
1429 ++BmUSEFUL(pm->op_pmshort);
1437 else if (!multiline) {
1438 if (*SvPVX(pm->op_pmshort) != *s
1439 || (pm->op_pmslen > 1
1440 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1443 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1444 SvREFCNT_dec(pm->op_pmshort);
1445 pm->op_pmshort = Nullsv; /* opt is being useless */
1449 /* only replace once? */
1450 once = !(rpm->op_pmflags & PMf_GLOBAL);
1452 /* known replacement string? */
1453 c = (rpm->op_pmflags & PMf_CONST) ? SvPV(dstr, clen) : Nullch;
1455 /* can do inplace substitution? */
1456 if (c && clen <= rx->minlen) {
1457 if (! pregexec(rx, s, strend, orig, 0,
1458 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1460 LEAVE_SCOPE(oldsave);
1463 if (force_on_match) {
1465 s = SvPV_force(TARG, len);
1468 if (rx->subbase) /* oops, no we can't */
1472 SvSCREAM_off(TARG); /* disable possible screamer */
1474 rxtainted = rx->exec_tainted;
1478 if (m - s > strend - d) { /* faster to shorten from end */
1480 Copy(c, m, clen, char);
1485 Move(d, m, i, char);
1489 SvCUR_set(TARG, m - s);
1492 else if (i = m - s) { /* faster from front */
1500 Copy(c, m, clen, char);
1505 Copy(c, d, clen, char);
1515 if (iters++ > maxiters)
1516 DIE("Substitution loop");
1517 rxtainted |= rx->exec_tainted;
1522 Move(s, d, i, char);
1526 Copy(c, d, clen, char);
1530 } while (pregexec(rx, s, strend, orig, s == m,
1531 Nullsv, TRUE)); /* don't match same null twice */
1534 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1535 Move(s, d, i+1, char); /* include the NUL */
1537 PUSHs(sv_2mortal(newSViv((I32)iters)));
1539 (void)SvPOK_only(TARG);
1543 LEAVE_SCOPE(oldsave);
1547 if (pregexec(rx, s, strend, orig, 0,
1548 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1550 if (force_on_match) {
1552 s = SvPV_force(TARG, len);
1555 rxtainted = rx->exec_tainted;
1556 dstr = NEWSV(25, sv_len(TARG));
1557 sv_setpvn(dstr, m, s-m);
1560 register CONTEXT *cx;
1562 RETURNOP(cPMOP->op_pmreplroot);
1565 if (iters++ > maxiters)
1566 DIE("Substitution loop");
1567 rxtainted |= rx->exec_tainted;
1568 if (rx->subbase && rx->subbase != orig) {
1573 strend = s + (strend - m);
1576 sv_catpvn(dstr, s, m-s);
1579 sv_catpvn(dstr, c, clen);
1582 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1583 sv_catpvn(dstr, s, strend - s);
1585 (void)SvOOK_off(TARG);
1586 Safefree(SvPVX(TARG));
1587 SvPVX(TARG) = SvPVX(dstr);
1588 SvCUR_set(TARG, SvCUR(dstr));
1589 SvLEN_set(TARG, SvLEN(dstr));
1593 (void)SvPOK_only(TARG);
1597 PUSHs(sv_2mortal(newSViv((I32)iters)));
1598 LEAVE_SCOPE(oldsave);
1602 LEAVE_SCOPE(oldsave);
1606 ++BmUSEFUL(pm->op_pmshort);
1608 LEAVE_SCOPE(oldsave);
1617 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1619 LEAVE; /* exit inner scope */
1622 if (stack_base + *markstack_ptr > sp) {
1625 LEAVE; /* exit outer scope */
1626 (void)POPMARK; /* pop src */
1627 items = --*markstack_ptr - markstack_ptr[-1];
1628 (void)POPMARK; /* pop dst */
1629 SP = stack_base + POPMARK; /* pop original mark */
1630 if (GIMME != G_ARRAY) {
1641 ENTER; /* enter inner scope */
1644 src = stack_base[*markstack_ptr];
1648 RETURNOP(cLOGOP->op_other);
1659 register CONTEXT *cx;
1660 struct block_sub cxsub;
1663 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1665 if (gimme == G_SCALAR) {
1668 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1676 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1678 *MARK = sv_mortalcopy(*MARK);
1683 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1684 curpm = newpm; /* ... and pop $1 et al */
1687 return pop_return();
1696 register CONTEXT *cx;
1698 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1701 DIE("Not a CODE reference");
1702 switch (SvTYPE(sv)) {
1707 if (sv == &sv_yes) /* unfound import, ignore */
1709 if (SvGMAGICAL(sv)) {
1711 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1716 DIE(no_usym, "a subroutine");
1717 if (op->op_private & HINT_STRICT_REFS)
1718 DIE(no_symref, sym, "a subroutine");
1719 cv = perl_get_cv(sym, TRUE);
1723 if (SvTYPE(cv) == SVt_PVCV)
1728 DIE("Not a CODE reference");
1733 if (!(cv = GvCVu((GV*)sv)))
1734 cv = sv_2cv(sv, &stash, &gv, TRUE);
1743 DIE("Not a CODE reference");
1745 if (!CvROOT(cv) && !CvXSUB(cv)) {
1749 /* anonymous or undef'd function leaves us no recourse */
1750 if (CvANON(cv) || !(gv = CvGV(cv)))
1751 DIE("Undefined subroutine called");
1752 /* autoloaded stub? */
1753 if (cv != GvCV(gv)) {
1757 /* should call AUTOLOAD now? */
1758 if ((autogv = gv_autoload(GvESTASH(gv), GvNAME(gv), GvNAMELEN(gv)))) {
1763 subname = sv_newmortal();
1764 gv_efullname3(subname, gv, Nullch);
1765 DIE("Undefined subroutine &%s called", SvPVX(subname));
1769 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1774 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1775 || strEQ(GvNAME(gv), "END")
1776 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1777 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1778 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1779 /* GV is potentially non-unique, or contain different CV. */
1780 sv_setsv(sv, newRV((SV*)cv));
1783 gv_efullname3(sv, gv, Nullch);
1786 if (CvXSUB(cv)) curcopdb = curcop;
1788 DIE("No DBsub routine");
1792 if (CvOLDSTYLE(cv)) {
1793 I32 (*fp3)_((int,int,int));
1795 register I32 items = SP - MARK;
1796 /* We dont worry to copy from @_. */
1801 stack_sp = mark + 1;
1802 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1803 items = (*fp3)(CvXSUBANY(cv).any_i32,
1804 MARK - stack_base + 1,
1806 stack_sp = stack_base + items;
1809 I32 markix = TOPMARK;
1814 /* Need to copy @_ to stack. Alternative may be to
1815 * switch stack to @_, and copy return values
1816 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1817 AV* av = GvAV(defgv);
1818 I32 items = AvFILL(av) + 1;
1821 /* Mark is at the end of the stack. */
1823 Copy(AvARRAY(av), sp + 1, items, SV*);
1828 if (curcopdb) { /* We assume that the first
1829 XSUB in &DB::sub is the
1835 /* Do we need to open block here? XXXX */
1836 (void)(*CvXSUB(cv))(cv);
1838 /* Enforce some sanity in scalar context. */
1839 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1840 if (markix > stack_sp - stack_base)
1841 *(stack_base + markix) = &sv_undef;
1843 *(stack_base + markix) = *stack_sp;
1844 stack_sp = stack_base + markix;
1852 register I32 items = SP - MARK;
1853 AV* padlist = CvPADLIST(cv);
1854 SV** svp = AvARRAY(padlist);
1855 push_return(op->op_next);
1856 PUSHBLOCK(cx, CXt_SUB, MARK);
1859 if (CvDEPTH(cv) < 2)
1860 (void)SvREFCNT_inc(cv);
1861 else { /* save temporaries on recursion? */
1862 if (CvDEPTH(cv) == 100 && dowarn
1863 && !(perldb && cv == GvCV(DBsub)))
1864 sub_crush_depth(cv);
1865 if (CvDEPTH(cv) > AvFILL(padlist)) {
1867 AV *newpad = newAV();
1868 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1869 I32 ix = AvFILL((AV*)svp[1]);
1870 svp = AvARRAY(svp[0]);
1871 for ( ;ix > 0; ix--) {
1872 if (svp[ix] != &sv_undef) {
1873 char *name = SvPVX(svp[ix]);
1874 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1875 || *name == '&') /* anonymous code? */
1877 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1879 else { /* our own lexical */
1881 av_store(newpad, ix, sv = (SV*)newAV());
1882 else if (*name == '%')
1883 av_store(newpad, ix, sv = (SV*)newHV());
1885 av_store(newpad, ix, sv = NEWSV(0,0));
1890 av_store(newpad, ix, sv = NEWSV(0,0));
1894 av = newAV(); /* will be @_ */
1896 av_store(newpad, 0, (SV*)av);
1897 AvFLAGS(av) = AVf_REIFY;
1898 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1899 AvFILL(padlist) = CvDEPTH(cv);
1900 svp = AvARRAY(padlist);
1904 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1906 AV* av = (AV*)curpad[0];
1913 cx->blk_sub.savearray = GvAV(defgv);
1914 cx->blk_sub.argarray = av;
1915 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1918 if (items > AvMAX(av) + 1) {
1920 if (AvARRAY(av) != ary) {
1921 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1922 SvPVX(av) = (char*)ary;
1924 if (items > AvMAX(av) + 1) {
1925 AvMAX(av) = items - 1;
1926 Renew(ary,items,SV*);
1928 SvPVX(av) = (char*)ary;
1931 Copy(MARK,AvARRAY(av),items,SV*);
1932 AvFILL(av) = items - 1;
1940 RETURNOP(CvSTART(cv));
1949 warn("Deep recursion on anonymous subroutine");
1951 SV* tmpstr = sv_newmortal();
1952 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1953 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
1963 I32 lval = op->op_flags & OPf_MOD;
1966 elem -= curcop->cop_arybase;
1967 if (SvTYPE(av) != SVt_PVAV)
1969 svp = av_fetch(av, elem, lval);
1971 if (!svp || *svp == &sv_undef)
1972 DIE(no_aelem, elem);
1973 if (op->op_private & OPpLVAL_INTRO)
1975 else if (op->op_private & OPpDEREF)
1976 provide_ref(op, *svp);
1978 PUSHs(svp ? *svp : &sv_undef);
1992 if (SvTYPE(sv) < SVt_RV)
1993 sv_upgrade(sv, SVt_RV);
1994 else if (SvTYPE(sv) >= SVt_PV) {
1995 (void)SvOOK_off(sv);
1996 Safefree(SvPVX(sv));
1997 SvLEN(sv) = SvCUR(sv) = 0;
1999 switch (op->op_private & OPpDEREF)
2002 SvRV(sv) = newSV(0);
2005 SvRV(sv) = (SV*)newAV();
2008 SvRV(sv) = (SV*)newHV();
2025 sv = *(stack_base + TOPMARK + 1);
2038 !(packname = SvPV(sv, packlen)) ||
2039 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2040 !(ob=(SV*)GvIO(iogv)))
2042 char *name = SvPV(nm, na);
2044 if (!packname || !isALPHA(*packname))
2045 DIE("Can't call method \"%s\" without a package or object reference", name);
2046 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2047 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2048 stash = gv_stashpvn(packname, packlen, TRUE);
2050 DIE("Can't call method \"%s\" in empty package \"%s\"",
2053 gv = gv_fetchmethod(stash,name);
2055 DIE("Can't locate object method \"%s\" via package \"%s\"",
2057 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
2060 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2063 if (!ob || !SvOBJECT(ob)) {
2064 char *name = SvPV(nm, na);
2065 DIE("Can't call method \"%s\" on unblessed reference", name);
2068 if (!gv) { /* nothing cached */
2069 char *name = SvPV(nm, na);
2070 gv = gv_fetchmethod(SvSTASH(ob),name);
2072 DIE("Can't locate object method \"%s\" via package \"%s\"",
2073 name, HvNAME(SvSTASH(ob)));
2076 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);