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;
616 while (relem <= lastrelem) { /* gobble up all the rest */
621 (void)av_store(ary,i++,sv);
631 magic = SvMAGICAL(hash) != 0;
634 while (relem < lastrelem) { /* gobble up all the rest */
639 sv = &sv_no, relem++;
640 tmpstr = NEWSV(29,0);
642 sv_setsv(tmpstr,*relem); /* value */
644 (void)hv_store_ent(hash,sv,tmpstr,0);
649 if (relem == lastrelem)
650 warn("Odd number of elements in hash list");
654 if (SvTHINKFIRST(sv)) {
655 if (SvREADONLY(sv) && curcop != &compiling) {
656 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
658 if (relem <= lastrelem)
665 if (relem <= lastrelem) {
666 sv_setsv(sv, *relem);
670 sv_setsv(sv, &sv_undef);
675 if (delaymagic & ~DM_DELAY) {
676 if (delaymagic & DM_UID) {
678 (void)setresuid(uid,euid,(Uid_t)-1);
681 (void)setreuid(uid,euid);
684 if ((delaymagic & DM_UID) == DM_RUID) {
686 delaymagic &= ~DM_RUID;
688 # endif /* HAS_SETRUID */
690 if ((delaymagic & DM_UID) == DM_EUID) {
692 delaymagic &= ~DM_EUID;
694 # endif /* HAS_SETEUID */
695 if (delaymagic & DM_UID) {
697 DIE("No setreuid available");
700 # endif /* HAS_SETREUID */
701 #endif /* HAS_SETRESUID */
703 euid = (int)geteuid();
705 if (delaymagic & DM_GID) {
707 (void)setresgid(gid,egid,(Gid_t)-1);
710 (void)setregid(gid,egid);
713 if ((delaymagic & DM_GID) == DM_RGID) {
715 delaymagic &= ~DM_RGID;
717 # endif /* HAS_SETRGID */
719 if ((delaymagic & DM_GID) == DM_EGID) {
721 delaymagic &= ~DM_EGID;
723 # endif /* HAS_SETEGID */
724 if (delaymagic & DM_GID) {
726 DIE("No setregid available");
729 # endif /* HAS_SETREGID */
730 #endif /* HAS_SETRESGID */
732 egid = (int)getegid();
734 tainting |= (uid && (euid != uid || egid != gid));
737 if (GIMME == G_ARRAY) {
741 SP = firstrelem + (lastlelem - firstlelem);
742 lelem = firstlelem + (relem - firstrelem);
744 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
751 SETi(lastrelem - firstrelem + 1);
759 register PMOP *pm = cPMOP;
766 register REGEXP *rx = pm->op_pmregexp;
770 I32 oldsave = savestack_ix;
772 if (op->op_flags & OPf_STACKED)
781 DIE("panic: do_match");
783 if (pm->op_pmflags & PMf_USED) {
784 if (gimme == G_ARRAY)
789 if (!rx->prelen && curpm) {
791 rx = pm->op_pmregexp;
794 if (global = pm->op_pmflags & PMf_GLOBAL) {
796 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
797 MAGIC* mg = mg_find(TARG, 'g');
798 if (mg && mg->mg_len >= 0) {
799 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
800 minmatch = (mg->mg_flags & MGf_MINMATCH);
804 if (!rx->nparens && !global)
805 gimme = G_SCALAR; /* accidental array context? */
806 safebase = (((gimme == G_ARRAY) || global) && !sawampersand);
807 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
809 multiline = pm->op_pmflags & PMf_MULTILINE;
813 if (global && rx->startp[0]) {
817 minmatch = (s == rx->startp[0]);
819 if (pm->op_pmshort) {
820 if (pm->op_pmflags & PMf_SCANFIRST) {
821 if (SvSCREAM(TARG)) {
822 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
824 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
826 else if (pm->op_pmflags & PMf_ALL)
829 else if (!(s = fbm_instr((unsigned char*)s,
830 (unsigned char*)strend, pm->op_pmshort)))
832 else if (pm->op_pmflags & PMf_ALL)
834 if (s && rx->regback >= 0) {
835 ++BmUSEFUL(pm->op_pmshort);
843 else if (!multiline) {
844 if (*SvPVX(pm->op_pmshort) != *s
845 || (pm->op_pmslen > 1
846 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
849 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
850 SvREFCNT_dec(pm->op_pmshort);
851 pm->op_pmshort = Nullsv; /* opt is being useless */
854 if (pregexec(rx, s, strend, truebase, minmatch,
855 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
858 if (pm->op_pmflags & PMf_ONCE)
859 pm->op_pmflags |= PMf_USED;
867 if (gimme == G_ARRAY) {
870 TAINT_IF(rx->exec_tainted);
872 if (global && !iters)
876 EXTEND(SP, iters + i);
877 EXTEND_MORTAL(iters + i);
878 for (i = !i; i <= iters; i++) {
879 PUSHs(sv_newmortal());
881 if ((s = rx->startp[i]) && rx->endp[i] ) {
882 len = rx->endp[i] - s;
883 sv_setpvn(*SP, s, len);
887 truebase = rx->subbeg;
889 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
893 LEAVE_SCOPE(oldsave);
899 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
900 mg = mg_find(TARG, 'g');
902 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
903 mg = mg_find(TARG, 'g');
906 mg->mg_len = rx->endp[0] - rx->subbeg;
907 if (rx->startp[0] == rx->endp[0])
908 mg->mg_flags |= MGf_MINMATCH;
910 mg->mg_flags &= ~MGf_MINMATCH;
913 LEAVE_SCOPE(oldsave);
918 ++BmUSEFUL(pm->op_pmshort);
920 if (pm->op_pmflags & PMf_ONCE)
921 pm->op_pmflags |= PMf_USED;
922 Safefree(rx->subbase);
923 rx->subbase = Nullch;
925 rx->subbeg = truebase;
928 rx->endp[0] = s + SvCUR(pm->op_pmshort);
934 tmps = rx->subbase = savepvn(t, strend-t);
936 rx->subend = tmps + (strend-t);
937 tmps = rx->startp[0] = tmps + (s - t);
938 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
940 LEAVE_SCOPE(oldsave);
945 ++BmUSEFUL(pm->op_pmshort);
948 LEAVE_SCOPE(oldsave);
949 if (gimme == G_ARRAY)
962 register IO *io = GvIO(last_in_gv);
963 register I32 type = op->op_type;
966 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
971 perl_call_method("READLINE", GIMME);
974 if (GIMME == G_SCALAR)
975 SvSetSV_nosteal(TARG, TOPs);
982 if (IoFLAGS(io) & IOf_ARGV) {
983 if (IoFLAGS(io) & IOf_START) {
984 IoFLAGS(io) &= ~IOf_START;
986 if (av_len(GvAVn(last_in_gv)) < 0) {
987 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
988 av_push(GvAVn(last_in_gv), tmpstr);
991 fp = nextargv(last_in_gv);
992 if (!fp) { /* Note: fp != IoIFP(io) */
993 (void)do_close(last_in_gv, FALSE); /* now it does*/
994 IoFLAGS(io) |= IOf_START;
997 else if (type == OP_GLOB) {
998 SV *tmpcmd = NEWSV(55, 0);
1002 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1003 /* since spawning off a process is a real performance hit */
1005 #include <descrip.h>
1006 #include <lib$routines.h>
1009 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1010 char vmsspec[NAM$C_MAXRSS+1];
1011 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1012 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1013 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1016 struct dsc$descriptor_s wilddsc
1017 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1018 struct dsc$descriptor_vs rsdsc
1019 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1020 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1022 /* We could find out if there's an explicit dev/dir or version
1023 by peeking into lib$find_file's internal context at
1024 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1025 but that's unsupported, so I don't want to do it now and
1026 have it bite someone in the future. */
1027 strcat(tmpfnam,tmpnam(NULL));
1028 cp = SvPV(tmpglob,i);
1030 if (cp[i] == ';') hasver = 1;
1032 if (sts) hasver = 1;
1036 hasdir = isunix = 1;
1039 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1044 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1045 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1046 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1047 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1048 &dfltdsc,NULL,NULL,NULL))&1)) {
1049 end = rstr + (unsigned long int) *rslt;
1050 if (!hasver) while (*end != ';') end--;
1051 *(end++) = '\n'; *end = '\0';
1052 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1054 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1059 while (*(--begin) != ']' && *begin != '>') ;
1062 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1064 if (cxt) (void)lib$find_file_end(&cxt);
1065 if (ok && sts != RMS$_NMF &&
1066 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1069 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1071 PerlIO_close(tmpfp);
1075 PerlIO_rewind(tmpfp);
1077 IoIFP(io) = fp = tmpfp;
1084 sv_setpv(tmpcmd, "for a in ");
1085 sv_catsv(tmpcmd, tmpglob);
1086 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1088 sv_setpv(tmpcmd, "perlglob ");
1089 sv_catsv(tmpcmd, tmpglob);
1090 sv_catpv(tmpcmd, " |");
1094 sv_setpvn(tmpcmd, cshname, cshlen);
1095 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1096 sv_catsv(tmpcmd, tmpglob);
1097 sv_catpv(tmpcmd, "' 2>/dev/null |");
1099 sv_setpv(tmpcmd, "echo ");
1100 sv_catsv(tmpcmd, tmpglob);
1102 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1104 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1107 #endif /* !DOSISH */
1108 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1109 FALSE, 0, 0, Nullfp);
1115 else if (type == OP_GLOB)
1119 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1120 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1121 if (GIMME == G_SCALAR) {
1122 (void)SvOK_off(TARG);
1127 if (GIMME == G_ARRAY) {
1128 sv = sv_2mortal(NEWSV(57, 80));
1133 (void)SvUPGRADE(sv, SVt_PV);
1134 tmplen = SvLEN(sv); /* remember if already alloced */
1136 Sv_Grow(sv, 80); /* try short-buffering it */
1137 if (type == OP_RCATLINE)
1143 if (!sv_gets(sv, fp, offset)) {
1144 PerlIO_clearerr(fp);
1145 if (IoFLAGS(io) & IOf_ARGV) {
1146 fp = nextargv(last_in_gv);
1149 (void)do_close(last_in_gv, FALSE);
1150 IoFLAGS(io) |= IOf_START;
1152 else if (type == OP_GLOB) {
1153 (void)do_close(last_in_gv, FALSE);
1155 if (GIMME == G_SCALAR) {
1156 (void)SvOK_off(TARG);
1161 /* This should not be marked tainted if the fp is marked clean */
1162 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1169 if (type == OP_GLOB) {
1172 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1173 tmps = SvEND(sv) - 1;
1174 if (*tmps == *SvPVX(rs)) {
1179 for (tmps = SvPVX(sv); *tmps; tmps++)
1180 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1181 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1183 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1184 (void)POPs; /* Unmatched wildcard? Chuck it... */
1188 if (GIMME == G_ARRAY) {
1189 if (SvLEN(sv) - SvCUR(sv) > 20) {
1190 SvLEN_set(sv, SvCUR(sv)+1);
1191 Renew(SvPVX(sv), SvLEN(sv), char);
1193 sv = sv_2mortal(NEWSV(58, 80));
1196 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1197 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1201 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1202 Renew(SvPVX(sv), SvLEN(sv), char);
1211 register CONTEXT *cx;
1215 * We don't just use the GIMME macro here because it assumes there's
1216 * already a context, which ain't necessarily so at initial startup.
1219 if (op->op_flags & OPf_KNOW)
1220 gimme = op->op_flags & OPf_LIST;
1221 else if (cxstack_ix >= 0)
1222 gimme = cxstack[cxstack_ix].blk_gimme;
1229 PUSHBLOCK(cx, CXt_BLOCK, sp);
1240 I32 lval = op->op_flags & OPf_MOD;
1242 if (SvTYPE(hv) != SVt_PVHV)
1244 he = hv_fetch_ent(hv, keysv, lval, 0);
1246 if (!he || HeVAL(he) == &sv_undef)
1247 DIE(no_helem, SvPV(keysv, na));
1248 if (op->op_private & OPpLVAL_INTRO) {
1249 if (HvNAME(hv) && isGV(HeVAL(he)))
1250 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1252 save_svref(&HeVAL(he));
1254 else if (op->op_private & OPpDEREF)
1255 provide_ref(op, HeVAL(he));
1257 PUSHs(he ? HeVAL(he) : &sv_undef);
1264 register CONTEXT *cx;
1270 if (op->op_flags & OPf_SPECIAL) {
1271 cx = &cxstack[cxstack_ix];
1272 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1277 if (op->op_flags & OPf_KNOW)
1278 gimme = op->op_flags & OPf_LIST;
1279 else if (cxstack_ix >= 0)
1280 gimme = cxstack[cxstack_ix].blk_gimme;
1284 if (gimme == G_SCALAR) {
1285 if (op->op_private & OPpLEAVE_VOID)
1290 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1293 *MARK = sv_mortalcopy(TOPs);
1302 for (mark = newsp + 1; mark <= SP; mark++)
1303 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1304 *mark = sv_mortalcopy(*mark);
1305 /* in case LEAVE wipes old return values */
1307 curpm = newpm; /* Don't pop $1 et al till now */
1317 register CONTEXT *cx;
1322 cx = &cxstack[cxstack_ix];
1323 if (cx->cx_type != CXt_LOOP)
1324 DIE("panic: pp_iter");
1326 av = cx->blk_loop.iterary;
1327 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1330 SvREFCNT_dec(*cx->blk_loop.itervar);
1332 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1336 if (av != curstack && SvIMMORTAL(sv)) {
1337 SV *lv = cx->blk_loop.iterlval;
1338 if (lv && SvREFCNT(lv) > 1) {
1343 SvREFCNT_dec(LvTARG(lv));
1345 lv = cx->blk_loop.iterlval = newSVsv(sv);
1346 sv_upgrade(lv, SVt_PVLV);
1347 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1350 LvTARG(lv) = SvREFCNT_inc(av);
1351 LvTARGOFF(lv) = cx->blk_loop.iterix;
1356 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1363 register PMOP *pm = cPMOP;
1379 register REGEXP *rx = pm->op_pmregexp;
1381 int force_on_match = 0;
1382 I32 oldsave = savestack_ix;
1384 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1386 if (op->op_flags & OPf_STACKED)
1392 s = SvPV(TARG, len);
1393 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1398 DIE("panic: do_subst");
1401 maxiters = (strend - s) + 10;
1403 if (!rx->prelen && curpm) {
1405 rx = pm->op_pmregexp;
1407 safebase = (!rx->nparens && !sawampersand);
1408 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1410 multiline = pm->op_pmflags & PMf_MULTILINE;
1413 if (pm->op_pmshort) {
1414 if (pm->op_pmflags & PMf_SCANFIRST) {
1415 if (SvSCREAM(TARG)) {
1416 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1418 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1421 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1424 if (s && rx->regback >= 0) {
1425 ++BmUSEFUL(pm->op_pmshort);
1433 else if (!multiline) {
1434 if (*SvPVX(pm->op_pmshort) != *s
1435 || (pm->op_pmslen > 1
1436 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1439 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1440 SvREFCNT_dec(pm->op_pmshort);
1441 pm->op_pmshort = Nullsv; /* opt is being useless */
1445 /* only replace once? */
1446 once = !(rpm->op_pmflags & PMf_GLOBAL);
1448 /* known replacement string? */
1449 c = (rpm->op_pmflags & PMf_CONST) ? SvPV(dstr, clen) : Nullch;
1451 /* can do inplace substitution? */
1452 if (c && clen <= rx->minlen) {
1453 if (! pregexec(rx, s, strend, orig, 0,
1454 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1456 LEAVE_SCOPE(oldsave);
1459 if (force_on_match) {
1461 s = SvPV_force(TARG, len);
1464 if (rx->subbase) /* oops, no we can't */
1468 SvSCREAM_off(TARG); /* disable possible screamer */
1470 rxtainted = rx->exec_tainted;
1474 if (m - s > strend - d) { /* faster to shorten from end */
1476 Copy(c, m, clen, char);
1481 Move(d, m, i, char);
1485 SvCUR_set(TARG, m - s);
1488 else if (i = m - s) { /* faster from front */
1496 Copy(c, m, clen, char);
1501 Copy(c, d, clen, char);
1511 if (iters++ > maxiters)
1512 DIE("Substitution loop");
1513 rxtainted |= rx->exec_tainted;
1518 Move(s, d, i, char);
1522 Copy(c, d, clen, char);
1526 } while (pregexec(rx, s, strend, orig, s == m,
1527 Nullsv, TRUE)); /* don't match same null twice */
1530 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1531 Move(s, d, i+1, char); /* include the NUL */
1533 PUSHs(sv_2mortal(newSViv((I32)iters)));
1535 (void)SvPOK_only(TARG);
1539 LEAVE_SCOPE(oldsave);
1543 if (pregexec(rx, s, strend, orig, 0,
1544 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1546 if (force_on_match) {
1548 s = SvPV_force(TARG, len);
1551 rxtainted = rx->exec_tainted;
1552 dstr = NEWSV(25, sv_len(TARG));
1553 sv_setpvn(dstr, m, s-m);
1556 register CONTEXT *cx;
1558 RETURNOP(cPMOP->op_pmreplroot);
1561 if (iters++ > maxiters)
1562 DIE("Substitution loop");
1563 rxtainted |= rx->exec_tainted;
1564 if (rx->subbase && rx->subbase != orig) {
1569 strend = s + (strend - m);
1572 sv_catpvn(dstr, s, m-s);
1575 sv_catpvn(dstr, c, clen);
1578 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1579 sv_catpvn(dstr, s, strend - s);
1581 (void)SvOOK_off(TARG);
1582 Safefree(SvPVX(TARG));
1583 SvPVX(TARG) = SvPVX(dstr);
1584 SvCUR_set(TARG, SvCUR(dstr));
1585 SvLEN_set(TARG, SvLEN(dstr));
1589 (void)SvPOK_only(TARG);
1593 PUSHs(sv_2mortal(newSViv((I32)iters)));
1594 LEAVE_SCOPE(oldsave);
1598 LEAVE_SCOPE(oldsave);
1602 ++BmUSEFUL(pm->op_pmshort);
1604 LEAVE_SCOPE(oldsave);
1613 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1615 LEAVE; /* exit inner scope */
1618 if (stack_base + *markstack_ptr > sp) {
1621 LEAVE; /* exit outer scope */
1622 (void)POPMARK; /* pop src */
1623 items = --*markstack_ptr - markstack_ptr[-1];
1624 (void)POPMARK; /* pop dst */
1625 SP = stack_base + POPMARK; /* pop original mark */
1626 if (GIMME != G_ARRAY) {
1637 ENTER; /* enter inner scope */
1640 src = stack_base[*markstack_ptr];
1644 RETURNOP(cLOGOP->op_other);
1655 register CONTEXT *cx;
1660 if (gimme == G_SCALAR) {
1663 if (SvFLAGS(TOPs) & SVs_TEMP)
1666 *MARK = sv_mortalcopy(TOPs);
1674 for (mark = newsp + 1; mark <= SP; mark++)
1675 if (!(SvFLAGS(*mark) & SVs_TEMP))
1676 *mark = sv_mortalcopy(*mark);
1677 /* in case LEAVE wipes old return values */
1680 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1681 AV* av = cx->blk_sub.argarray;
1686 curpm = newpm; /* Don't pop $1 et al till now */
1690 return pop_return();
1699 register CONTEXT *cx;
1701 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1704 DIE("Not a CODE reference");
1705 switch (SvTYPE(sv)) {
1710 if (sv == &sv_yes) /* unfound import, ignore */
1713 DIE(no_usym, "a subroutine");
1715 if (op->op_private & HINT_STRICT_REFS)
1716 DIE(no_symref, sym, "a subroutine");
1717 cv = perl_get_cv(sym, TRUE);
1721 if (SvTYPE(cv) == SVt_PVCV)
1726 DIE("Not a CODE reference");
1731 if (!(cv = GvCVu((GV*)sv)))
1732 cv = sv_2cv(sv, &stash, &gv, TRUE);
1741 DIE("Not a CODE reference");
1743 if (!CvROOT(cv) && !CvXSUB(cv)) {
1747 /* anonymous or undef'd function leaves us no recourse */
1748 if (CvANON(cv) || !(gv = CvGV(cv)))
1749 DIE("Undefined subroutine called");
1750 /* autoloaded stub? */
1751 if (cv != GvCV(gv)) {
1755 /* should call AUTOLOAD now? */
1756 if ((autogv = gv_autoload(GvESTASH(gv), GvNAME(gv), GvNAMELEN(gv)))) {
1761 subname = sv_newmortal();
1762 gv_efullname3(subname, gv, Nullch);
1763 DIE("Undefined subroutine &%s called", SvPVX(subname));
1767 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1772 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1773 || strEQ(GvNAME(gv), "END")
1774 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1775 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1776 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1777 /* GV is potentially non-unique, or contain different CV. */
1778 sv_setsv(sv, newRV((SV*)cv));
1781 gv_efullname3(sv, gv, Nullch);
1784 if (CvXSUB(cv)) curcopdb = curcop;
1786 DIE("No DBsub routine");
1790 if (CvOLDSTYLE(cv)) {
1791 I32 (*fp3)_((int,int,int));
1793 register I32 items = SP - MARK;
1794 /* We dont worry to copy from @_. */
1799 stack_sp = mark + 1;
1800 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1801 items = (*fp3)(CvXSUBANY(cv).any_i32,
1802 MARK - stack_base + 1,
1804 stack_sp = stack_base + items;
1807 I32 markix = TOPMARK;
1812 /* Need to copy @_ to stack. Alternative may be to
1813 * switch stack to @_, and copy return values
1814 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1815 AV* av = GvAV(defgv);
1816 I32 items = AvFILL(av) + 1;
1819 /* Mark is at the end of the stack. */
1821 Copy(AvARRAY(av), sp + 1, items, SV*);
1826 if (curcopdb) { /* We assume that the first
1827 XSUB in &DB::sub is the
1833 /* Do we need to open block here? XXXX */
1834 (void)(*CvXSUB(cv))(cv);
1836 /* Enforce some sanity in scalar context. */
1837 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1838 if (markix > stack_sp - stack_base)
1839 *(stack_base + markix) = &sv_undef;
1841 *(stack_base + markix) = *stack_sp;
1842 stack_sp = stack_base + markix;
1850 register I32 items = SP - MARK;
1851 AV* padlist = CvPADLIST(cv);
1852 SV** svp = AvARRAY(padlist);
1853 push_return(op->op_next);
1854 PUSHBLOCK(cx, CXt_SUB, MARK);
1857 if (CvDEPTH(cv) < 2)
1858 (void)SvREFCNT_inc(cv);
1859 else { /* save temporaries on recursion? */
1860 if (CvDEPTH(cv) == 100 && dowarn
1861 && !(perldb && cv == GvCV(DBsub)))
1862 sub_crush_depth(cv);
1863 if (CvDEPTH(cv) > AvFILL(padlist)) {
1865 AV *newpad = newAV();
1866 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1867 I32 ix = AvFILL((AV*)svp[1]);
1868 svp = AvARRAY(svp[0]);
1869 for ( ;ix > 0; ix--) {
1870 if (svp[ix] != &sv_undef) {
1871 char *name = SvPVX(svp[ix]);
1872 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1873 || *name == '&') /* anonymous code? */
1875 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1877 else { /* our own lexical */
1879 av_store(newpad, ix, sv = (SV*)newAV());
1880 else if (*name == '%')
1881 av_store(newpad, ix, sv = (SV*)newHV());
1883 av_store(newpad, ix, sv = NEWSV(0,0));
1888 av_store(newpad, ix, sv = NEWSV(0,0));
1892 av = newAV(); /* will be @_ */
1894 av_store(newpad, 0, (SV*)av);
1895 AvFLAGS(av) = AVf_REIFY;
1896 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1897 AvFILL(padlist) = CvDEPTH(cv);
1898 svp = AvARRAY(padlist);
1902 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1904 AV* av = (AV*)curpad[0];
1911 cx->blk_sub.savearray = GvAV(defgv);
1912 cx->blk_sub.argarray = av;
1913 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1916 if (items > AvMAX(av) + 1) {
1918 if (AvARRAY(av) != ary) {
1919 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1920 SvPVX(av) = (char*)ary;
1922 if (items > AvMAX(av) + 1) {
1923 AvMAX(av) = items - 1;
1924 Renew(ary,items,SV*);
1926 SvPVX(av) = (char*)ary;
1929 Copy(MARK,AvARRAY(av),items,SV*);
1930 AvFILL(av) = items - 1;
1938 RETURNOP(CvSTART(cv));
1947 warn("Deep recursion on anonymous subroutine");
1949 SV* tmpstr = sv_newmortal();
1950 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1951 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
1961 I32 lval = op->op_flags & OPf_MOD;
1964 elem -= curcop->cop_arybase;
1965 if (SvTYPE(av) != SVt_PVAV)
1967 svp = av_fetch(av, elem, lval);
1969 if (!svp || *svp == &sv_undef)
1970 DIE(no_aelem, elem);
1971 if (op->op_private & OPpLVAL_INTRO)
1973 else if (op->op_private & OPpDEREF)
1974 provide_ref(op, *svp);
1976 PUSHs(svp ? *svp : &sv_undef);
1990 if (SvTYPE(sv) < SVt_RV)
1991 sv_upgrade(sv, SVt_RV);
1992 else if (SvTYPE(sv) >= SVt_PV) {
1993 (void)SvOOK_off(sv);
1994 Safefree(SvPVX(sv));
1995 SvLEN(sv) = SvCUR(sv) = 0;
1997 switch (op->op_private & OPpDEREF)
2000 SvRV(sv) = newSV(0);
2003 SvRV(sv) = (SV*)newAV();
2006 SvRV(sv) = (SV*)newHV();
2023 sv = *(stack_base + TOPMARK + 1);
2036 !(packname = SvPV(sv, packlen)) ||
2037 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2038 !(ob=(SV*)GvIO(iogv)))
2040 char *name = SvPV(nm, na);
2042 if (!packname || !isALPHA(*packname))
2043 DIE("Can't call method \"%s\" without a package or object reference", name);
2044 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2045 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2046 stash = gv_stashpvn(packname, packlen, TRUE);
2048 DIE("Can't call method \"%s\" in empty package \"%s\"",
2051 gv = gv_fetchmethod(stash,name);
2053 DIE("Can't locate object method \"%s\" via package \"%s\"",
2055 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
2058 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2061 if (!ob || !SvOBJECT(ob)) {
2062 char *name = SvPV(nm, na);
2063 DIE("Can't call method \"%s\" on unblessed reference", name);
2066 if (!gv) { /* nothing cached */
2067 char *name = SvPV(nm, na);
2068 gv = gv_fetchmethod(SvSTASH(ob),name);
2070 DIE("Can't locate object method \"%s\" via package \"%s\"",
2071 name, HvNAME(SvSTASH(ob)));
2074 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);