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_flags & OPf_REF) {
435 if (SvTYPE(sv) == SVt_PVAV) {
437 if (op->op_flags & OPf_REF) {
445 if (SvTYPE(sv) != SVt_PVGV) {
448 if (SvGMAGICAL(sv)) {
454 if (op->op_flags & OPf_REF ||
455 op->op_private & HINT_STRICT_REFS)
456 DIE(no_usym, "an ARRAY");
459 if (GIMME == G_ARRAY)
464 if (op->op_private & HINT_STRICT_REFS)
465 DIE(no_symref, sym, "an ARRAY");
466 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
471 if (op->op_private & OPpLVAL_INTRO)
473 if (op->op_flags & OPf_REF) {
480 if (GIMME == G_ARRAY) {
481 I32 maxarg = AvFILL(av) + 1;
483 Copy(AvARRAY(av), SP+1, maxarg, SV*);
488 I32 maxarg = AvFILL(av) + 1;
502 if (SvTYPE(hv) != SVt_PVHV)
503 DIE("Not a HASH reference");
504 if (op->op_flags & OPf_REF) {
510 if (SvTYPE(sv) == SVt_PVHV) {
512 if (op->op_flags & OPf_REF) {
520 if (SvTYPE(sv) != SVt_PVGV) {
523 if (SvGMAGICAL(sv)) {
529 if (op->op_flags & OPf_REF ||
530 op->op_private & HINT_STRICT_REFS)
531 DIE(no_usym, "a HASH");
534 if (GIMME == G_ARRAY) {
541 if (op->op_private & HINT_STRICT_REFS)
542 DIE(no_symref, sym, "a HASH");
543 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
548 if (op->op_private & OPpLVAL_INTRO)
550 if (op->op_flags & OPf_REF) {
557 if (GIMME == G_ARRAY) { /* array wanted */
564 sv_setpvf(TARG, "%ld/%ld",
565 (long)HvFILL(hv), (long)HvMAX(hv) + 1);
576 SV **lastlelem = stack_sp;
577 SV **lastrelem = stack_base + POPMARK;
578 SV **firstrelem = stack_base + POPMARK + 1;
579 SV **firstlelem = lastrelem + 1;
592 delaymagic = DM_DELAY; /* catch simultaneous items */
594 /* If there's a common identifier on both sides we have to take
595 * special care that assigning the identifier on the left doesn't
596 * clobber a value on the right that's used later in the list.
598 if (op->op_private & OPpASSIGN_COMMON) {
599 for (relem = firstrelem; relem <= lastrelem; relem++) {
602 TAINT_NOT; /* Each item is independent */
603 *relem = sv_mortalcopy(sv);
612 while (lelem <= lastlelem) {
613 TAINT_NOT; /* Each item stands on its own, taintwise. */
615 switch (SvTYPE(sv)) {
618 magic = SvMAGICAL(ary) != 0;
621 av_extend(ary, lastrelem - relem);
623 while (relem <= lastrelem) { /* gobble up all the rest */
629 didstore = av_store(ary,i++,sv);
642 magic = SvMAGICAL(hash) != 0;
645 while (relem < lastrelem) { /* gobble up all the rest */
651 sv = &sv_no, relem++;
652 tmpstr = NEWSV(29,0);
654 sv_setsv(tmpstr,*relem); /* value */
656 didstore = hv_store_ent(hash,sv,tmpstr,0);
660 SvREFCNT_dec(tmpstr);
664 if (relem == lastrelem)
665 warn("Odd number of elements in hash list");
669 if (SvTHINKFIRST(sv)) {
670 if (SvREADONLY(sv) && curcop != &compiling) {
671 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
673 if (relem <= lastrelem)
680 if (relem <= lastrelem) {
681 sv_setsv(sv, *relem);
685 sv_setsv(sv, &sv_undef);
690 if (delaymagic & ~DM_DELAY) {
691 if (delaymagic & DM_UID) {
693 (void)setresuid(uid,euid,(Uid_t)-1);
696 (void)setreuid(uid,euid);
699 if ((delaymagic & DM_UID) == DM_RUID) {
701 delaymagic &= ~DM_RUID;
703 # endif /* HAS_SETRUID */
705 if ((delaymagic & DM_UID) == DM_EUID) {
707 delaymagic &= ~DM_EUID;
709 # endif /* HAS_SETEUID */
710 if (delaymagic & DM_UID) {
712 DIE("No setreuid available");
715 # endif /* HAS_SETREUID */
716 #endif /* HAS_SETRESUID */
718 euid = (int)geteuid();
720 if (delaymagic & DM_GID) {
722 (void)setresgid(gid,egid,(Gid_t)-1);
725 (void)setregid(gid,egid);
728 if ((delaymagic & DM_GID) == DM_RGID) {
730 delaymagic &= ~DM_RGID;
732 # endif /* HAS_SETRGID */
734 if ((delaymagic & DM_GID) == DM_EGID) {
736 delaymagic &= ~DM_EGID;
738 # endif /* HAS_SETEGID */
739 if (delaymagic & DM_GID) {
741 DIE("No setregid available");
744 # endif /* HAS_SETREGID */
745 #endif /* HAS_SETRESGID */
747 egid = (int)getegid();
749 tainting |= (uid && (euid != uid || egid != gid));
756 else if (gimme == G_SCALAR) {
759 SETi(lastrelem - firstrelem + 1);
765 SP = firstrelem + (lastlelem - firstlelem);
766 lelem = firstlelem + (relem - firstrelem);
768 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
776 register PMOP *pm = cPMOP;
783 register REGEXP *rx = pm->op_pmregexp;
787 I32 oldsave = savestack_ix;
788 I32 update_minmatch = 1;
790 if (op->op_flags & OPf_STACKED)
799 DIE("panic: do_match");
802 if (pm->op_pmflags & PMf_USED) {
803 if (gimme == G_ARRAY)
808 if (!rx->prelen && curpm) {
810 rx = pm->op_pmregexp;
813 if (global = pm->op_pmflags & PMf_GLOBAL) {
815 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
816 MAGIC* mg = mg_find(TARG, 'g');
817 if (mg && mg->mg_len >= 0) {
818 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
819 minmatch = (mg->mg_flags & MGf_MINMATCH);
824 if (!rx->nparens && !global)
825 gimme = G_SCALAR; /* accidental array context? */
826 safebase = (((gimme == G_ARRAY) || global || !rx->nparens)
828 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
830 multiline = pm->op_pmflags & PMf_MULTILINE;
834 if (global && rx->startp[0]) {
836 if ((s + rx->minlen) > strend)
838 if (update_minmatch++)
839 minmatch = (s == rx->startp[0]);
841 if (pm->op_pmshort) {
842 if (pm->op_pmflags & PMf_SCANFIRST) {
843 if (SvSCREAM(TARG)) {
844 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
846 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
848 else if (pm->op_pmflags & PMf_ALL)
851 else if (!(s = fbm_instr((unsigned char*)s,
852 (unsigned char*)strend, pm->op_pmshort)))
854 else if (pm->op_pmflags & PMf_ALL)
856 if (s && rx->regback >= 0) {
857 ++BmUSEFUL(pm->op_pmshort);
865 else if (!multiline) {
866 if (*SvPVX(pm->op_pmshort) != *s
867 || (pm->op_pmslen > 1
868 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
871 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
872 SvREFCNT_dec(pm->op_pmshort);
873 pm->op_pmshort = Nullsv; /* opt is being useless */
876 if (pregexec(rx, s, strend, truebase, minmatch,
877 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
880 if (pm->op_pmflags & PMf_ONCE)
881 pm->op_pmflags |= PMf_USED;
889 TAINT_IF(rx->exec_tainted);
890 if (gimme == G_ARRAY) {
894 if (global && !iters)
898 EXTEND(SP, iters + i);
899 EXTEND_MORTAL(iters + i);
900 for (i = !i; i <= iters; i++) {
901 PUSHs(sv_newmortal());
903 if ((s = rx->startp[i]) && rx->endp[i] ) {
904 len = rx->endp[i] - s;
905 sv_setpvn(*SP, s, len);
909 truebase = rx->subbeg;
911 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
915 LEAVE_SCOPE(oldsave);
921 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
922 mg = mg_find(TARG, 'g');
924 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
925 mg = mg_find(TARG, 'g');
928 mg->mg_len = rx->endp[0] - rx->subbeg;
929 if (rx->startp[0] == rx->endp[0])
930 mg->mg_flags |= MGf_MINMATCH;
932 mg->mg_flags &= ~MGf_MINMATCH;
935 LEAVE_SCOPE(oldsave);
940 TAINT_IF(rx->exec_tainted);
941 ++BmUSEFUL(pm->op_pmshort);
943 if (pm->op_pmflags & PMf_ONCE)
944 pm->op_pmflags |= PMf_USED;
945 Safefree(rx->subbase);
946 rx->subbase = Nullch;
948 rx->subbeg = truebase;
951 rx->endp[0] = s + SvCUR(pm->op_pmshort);
957 tmps = rx->subbase = savepvn(t, strend-t);
959 rx->subend = tmps + (strend-t);
960 tmps = rx->startp[0] = tmps + (s - t);
961 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
963 LEAVE_SCOPE(oldsave);
968 ++BmUSEFUL(pm->op_pmshort);
971 if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
972 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
973 MAGIC* mg = mg_find(TARG, 'g');
978 LEAVE_SCOPE(oldsave);
979 if (gimme == G_ARRAY)
992 register IO *io = GvIO(last_in_gv);
993 register I32 type = op->op_type;
997 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
1002 perl_call_method("READLINE", gimme);
1005 if (gimme == G_SCALAR)
1006 SvSetMagicSV_nosteal(TARG, TOPs);
1013 if (IoFLAGS(io) & IOf_ARGV) {
1014 if (IoFLAGS(io) & IOf_START) {
1015 IoFLAGS(io) &= ~IOf_START;
1017 if (av_len(GvAVn(last_in_gv)) < 0) {
1018 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
1019 av_push(GvAVn(last_in_gv), tmpstr);
1022 fp = nextargv(last_in_gv);
1023 if (!fp) { /* Note: fp != IoIFP(io) */
1024 (void)do_close(last_in_gv, FALSE); /* now it does*/
1025 IoFLAGS(io) |= IOf_START;
1028 else if (type == OP_GLOB) {
1029 SV *tmpcmd = NEWSV(55, 0);
1033 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1034 /* since spawning off a process is a real performance hit */
1036 #include <descrip.h>
1037 #include <lib$routines.h>
1040 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1041 char vmsspec[NAM$C_MAXRSS+1];
1042 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1043 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1044 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1047 struct dsc$descriptor_s wilddsc
1048 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1049 struct dsc$descriptor_vs rsdsc
1050 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1051 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1053 /* We could find out if there's an explicit dev/dir or version
1054 by peeking into lib$find_file's internal context at
1055 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1056 but that's unsupported, so I don't want to do it now and
1057 have it bite someone in the future. */
1058 strcat(tmpfnam,tmpnam(NULL));
1059 cp = SvPV(tmpglob,i);
1061 if (cp[i] == ';') hasver = 1;
1063 if (sts) hasver = 1;
1067 hasdir = isunix = 1;
1070 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1075 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1076 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1077 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1078 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1079 &dfltdsc,NULL,NULL,NULL))&1)) {
1080 end = rstr + (unsigned long int) *rslt;
1081 if (!hasver) while (*end != ';') end--;
1082 *(end++) = '\n'; *end = '\0';
1083 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1085 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1090 while (*(--begin) != ']' && *begin != '>') ;
1093 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1095 if (cxt) (void)lib$find_file_end(&cxt);
1096 if (ok && sts != RMS$_NMF &&
1097 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1100 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1102 PerlIO_close(tmpfp);
1106 PerlIO_rewind(tmpfp);
1108 IoIFP(io) = fp = tmpfp;
1109 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
1116 sv_setpv(tmpcmd, "for a in ");
1117 sv_catsv(tmpcmd, tmpglob);
1118 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1120 sv_setpv(tmpcmd, "perlglob ");
1121 sv_catsv(tmpcmd, tmpglob);
1122 sv_catpv(tmpcmd, " |");
1126 sv_setpvn(tmpcmd, cshname, cshlen);
1127 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1128 sv_catsv(tmpcmd, tmpglob);
1129 sv_catpv(tmpcmd, "' 2>/dev/null |");
1131 sv_setpv(tmpcmd, "echo ");
1132 sv_catsv(tmpcmd, tmpglob);
1134 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1136 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1139 #endif /* !DOSISH */
1140 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1141 FALSE, 0, 0, Nullfp);
1147 else if (type == OP_GLOB)
1151 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1152 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1153 if (gimme == G_SCALAR) {
1154 (void)SvOK_off(TARG);
1159 if (gimme == G_SCALAR) {
1163 (void)SvUPGRADE(sv, SVt_PV);
1164 tmplen = SvLEN(sv); /* remember if already alloced */
1166 Sv_Grow(sv, 80); /* try short-buffering it */
1167 if (type == OP_RCATLINE)
1173 sv = sv_2mortal(NEWSV(57, 80));
1177 if (!sv_gets(sv, fp, offset)) {
1178 PerlIO_clearerr(fp);
1179 if (IoFLAGS(io) & IOf_ARGV) {
1180 fp = nextargv(last_in_gv);
1183 (void)do_close(last_in_gv, FALSE);
1184 IoFLAGS(io) |= IOf_START;
1186 else if (type == OP_GLOB) {
1187 if (do_close(last_in_gv, FALSE) & ~0xFF)
1188 warn("internal error: glob failed");
1190 if (gimme == G_SCALAR) {
1191 (void)SvOK_off(TARG);
1196 /* This should not be marked tainted if the fp is marked clean */
1197 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1204 if (type == OP_GLOB) {
1207 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1208 tmps = SvEND(sv) - 1;
1209 if (*tmps == *SvPVX(rs)) {
1214 for (tmps = SvPVX(sv); *tmps; tmps++)
1215 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1216 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1218 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1219 (void)POPs; /* Unmatched wildcard? Chuck it... */
1223 if (gimme == G_ARRAY) {
1224 if (SvLEN(sv) - SvCUR(sv) > 20) {
1225 SvLEN_set(sv, SvCUR(sv)+1);
1226 Renew(SvPVX(sv), SvLEN(sv), char);
1228 sv = sv_2mortal(NEWSV(58, 80));
1231 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1232 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1236 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1237 Renew(SvPVX(sv), SvLEN(sv), char);
1246 register CONTEXT *cx;
1247 I32 gimme = OP_GIMME(op, -1);
1250 if (cxstack_ix >= 0)
1251 gimme = cxstack[cxstack_ix].blk_gimme;
1259 PUSHBLOCK(cx, CXt_BLOCK, sp);
1270 U32 lval = op->op_flags & OPf_MOD;
1271 U32 defer = op->op_private & OPpLVAL_DEFER;
1273 if (SvTYPE(hv) != SVt_PVHV)
1275 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
1277 if (!he || HeVAL(he) == &sv_undef) {
1281 DIE(no_helem, SvPV(keysv, na));
1282 lv = sv_newmortal();
1283 sv_upgrade(lv, SVt_PVLV);
1285 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1286 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1287 LvTARG(lv) = SvREFCNT_inc(hv);
1292 if (op->op_private & OPpLVAL_INTRO) {
1293 if (HvNAME(hv) && isGV(HeVAL(he)))
1294 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1296 save_svref(&HeVAL(he));
1298 else if (op->op_private & OPpDEREF)
1299 vivify_ref(HeVAL(he), op->op_private & OPpDEREF);
1301 PUSHs(he ? HeVAL(he) : &sv_undef);
1308 register CONTEXT *cx;
1314 if (op->op_flags & OPf_SPECIAL) {
1315 cx = &cxstack[cxstack_ix];
1316 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1321 gimme = OP_GIMME(op, -1);
1323 if (cxstack_ix >= 0)
1324 gimme = cxstack[cxstack_ix].blk_gimme;
1330 if (gimme == G_VOID)
1332 else if (gimme == G_SCALAR) {
1335 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1338 *MARK = sv_mortalcopy(TOPs);
1345 else if (gimme == G_ARRAY) {
1346 /* in case LEAVE wipes old return values */
1347 for (mark = newsp + 1; mark <= SP; mark++) {
1348 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
1349 *mark = sv_mortalcopy(*mark);
1350 TAINT_NOT; /* Each item is independent */
1354 curpm = newpm; /* Don't pop $1 et al till now */
1364 register CONTEXT *cx;
1369 cx = &cxstack[cxstack_ix];
1370 if (cx->cx_type != CXt_LOOP)
1371 DIE("panic: pp_iter");
1373 av = cx->blk_loop.iterary;
1374 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1377 SvREFCNT_dec(*cx->blk_loop.itervar);
1379 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1383 if (av != curstack && SvIMMORTAL(sv)) {
1384 SV *lv = cx->blk_loop.iterlval;
1385 if (lv && SvREFCNT(lv) > 1) {
1390 SvREFCNT_dec(LvTARG(lv));
1392 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
1393 sv_upgrade(lv, SVt_PVLV);
1395 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1397 LvTARG(lv) = SvREFCNT_inc(av);
1398 LvTARGOFF(lv) = cx->blk_loop.iterix;
1403 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1410 register PMOP *pm = cPMOP;
1426 register REGEXP *rx = pm->op_pmregexp;
1428 int force_on_match = 0;
1429 I32 oldsave = savestack_ix;
1431 /* known replacement string? */
1432 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
1433 if (op->op_flags & OPf_STACKED)
1439 if (SvREADONLY(TARG)
1440 || (SvTYPE(TARG) > SVt_PVLV
1441 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1443 s = SvPV(TARG, len);
1444 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
1450 DIE("panic: do_subst");
1453 maxiters = (strend - s) + 10;
1455 if (!rx->prelen && curpm) {
1457 rx = pm->op_pmregexp;
1459 safebase = (!rx->nparens && !sawampersand);
1460 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1462 multiline = pm->op_pmflags & PMf_MULTILINE;
1465 if (pm->op_pmshort) {
1466 if (pm->op_pmflags & PMf_SCANFIRST) {
1467 if (SvSCREAM(TARG)) {
1468 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1470 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1473 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1476 if (s && rx->regback >= 0) {
1477 ++BmUSEFUL(pm->op_pmshort);
1485 else if (!multiline) {
1486 if (*SvPVX(pm->op_pmshort) != *s
1487 || (pm->op_pmslen > 1
1488 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1491 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1492 SvREFCNT_dec(pm->op_pmshort);
1493 pm->op_pmshort = Nullsv; /* opt is being useless */
1497 /* only replace once? */
1498 once = !(rpm->op_pmflags & PMf_GLOBAL);
1500 /* known replacement string? */
1501 c = dstr ? SvPV(dstr, clen) : Nullch;
1503 /* can do inplace substitution? */
1504 if (c && clen <= rx->minlen && safebase) {
1505 if (! pregexec(rx, s, strend, orig, 0,
1506 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1508 LEAVE_SCOPE(oldsave);
1511 if (force_on_match) {
1513 s = SvPV_force(TARG, len);
1518 SvSCREAM_off(TARG); /* disable possible screamer */
1520 rxtainted = rx->exec_tainted;
1524 if (m - s > strend - d) { /* faster to shorten from end */
1526 Copy(c, m, clen, char);
1531 Move(d, m, i, char);
1535 SvCUR_set(TARG, m - s);
1538 else if (i = m - s) { /* faster from front */
1546 Copy(c, m, clen, char);
1551 Copy(c, d, clen, char);
1556 TAINT_IF(rxtainted);
1562 if (iters++ > maxiters)
1563 DIE("Substitution loop");
1564 rxtainted |= rx->exec_tainted;
1569 Move(s, d, i, char);
1573 Copy(c, d, clen, char);
1577 } while (pregexec(rx, s, strend, orig, s == m,
1578 Nullsv, TRUE)); /* don't match same null twice */
1581 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1582 Move(s, d, i+1, char); /* include the NUL */
1584 TAINT_IF(rxtainted);
1585 PUSHs(sv_2mortal(newSViv((I32)iters)));
1587 (void)SvPOK_only(TARG);
1590 LEAVE_SCOPE(oldsave);
1594 if (pregexec(rx, s, strend, orig, 0,
1595 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1596 if (force_on_match) {
1598 s = SvPV_force(TARG, len);
1601 rxtainted = rx->exec_tainted;
1602 dstr = NEWSV(25, sv_len(TARG));
1603 sv_setpvn(dstr, m, s-m);
1606 register CONTEXT *cx;
1608 RETURNOP(cPMOP->op_pmreplroot);
1611 if (iters++ > maxiters)
1612 DIE("Substitution loop");
1613 rxtainted |= rx->exec_tainted;
1614 if (rx->subbase && rx->subbase != orig) {
1619 strend = s + (strend - m);
1622 sv_catpvn(dstr, s, m-s);
1625 sv_catpvn(dstr, c, clen);
1628 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1629 sv_catpvn(dstr, s, strend - s);
1631 TAINT_IF(rxtainted);
1633 (void)SvOOK_off(TARG);
1634 Safefree(SvPVX(TARG));
1635 SvPVX(TARG) = SvPVX(dstr);
1636 SvCUR_set(TARG, SvCUR(dstr));
1637 SvLEN_set(TARG, SvLEN(dstr));
1641 (void)SvPOK_only(TARG);
1644 PUSHs(sv_2mortal(newSViv((I32)iters)));
1645 LEAVE_SCOPE(oldsave);
1651 ++BmUSEFUL(pm->op_pmshort);
1655 LEAVE_SCOPE(oldsave);
1664 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1666 LEAVE; /* exit inner scope */
1669 if (stack_base + *markstack_ptr > sp) {
1671 I32 gimme = GIMME_V;
1673 LEAVE; /* exit outer scope */
1674 (void)POPMARK; /* pop src */
1675 items = --*markstack_ptr - markstack_ptr[-1];
1676 (void)POPMARK; /* pop dst */
1677 SP = stack_base + POPMARK; /* pop original mark */
1678 if (gimme == G_SCALAR) {
1682 else if (gimme == G_ARRAY)
1689 ENTER; /* enter inner scope */
1692 src = stack_base[*markstack_ptr];
1696 RETURNOP(cLOGOP->op_other);
1707 register CONTEXT *cx;
1708 struct block_sub cxsub;
1711 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1714 if (gimme == G_SCALAR) {
1717 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1724 else if (gimme == G_ARRAY) {
1725 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1726 if (!SvTEMP(*MARK)) {
1727 *MARK = sv_mortalcopy(*MARK);
1728 TAINT_NOT; /* Each item is independent */
1734 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1735 curpm = newpm; /* ... and pop $1 et al */
1738 return pop_return();
1747 register CONTEXT *cx;
1749 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1752 DIE("Not a CODE reference");
1753 switch (SvTYPE(sv)) {
1758 if (sv == &sv_yes) /* unfound import, ignore */
1760 if (SvGMAGICAL(sv)) {
1762 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1767 DIE(no_usym, "a subroutine");
1768 if (op->op_private & HINT_STRICT_REFS)
1769 DIE(no_symref, sym, "a subroutine");
1770 cv = perl_get_cv(sym, TRUE);
1774 if (SvTYPE(cv) == SVt_PVCV)
1779 DIE("Not a CODE reference");
1784 if (!(cv = GvCVu((GV*)sv)))
1785 cv = sv_2cv(sv, &stash, &gv, TRUE);
1794 DIE("Not a CODE reference");
1796 if (!CvROOT(cv) && !CvXSUB(cv)) {
1800 /* anonymous or undef'd function leaves us no recourse */
1801 if (CvANON(cv) || !(gv = CvGV(cv)))
1802 DIE("Undefined subroutine called");
1803 /* autoloaded stub? */
1804 if (cv != GvCV(gv)) {
1808 /* should call AUTOLOAD now? */
1809 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1816 subname = sv_newmortal();
1817 gv_efullname3(subname, gv, Nullch);
1818 DIE("Undefined subroutine &%s called", SvPVX(subname));
1822 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1827 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1828 || strEQ(GvNAME(gv), "END")
1829 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1830 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1831 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1832 /* GV is potentially non-unique, or contain different CV. */
1833 sv_setsv(sv, newRV((SV*)cv));
1836 gv_efullname3(sv, gv, Nullch);
1839 if (CvXSUB(cv)) curcopdb = curcop;
1841 DIE("No DBsub routine");
1845 if (CvOLDSTYLE(cv)) {
1846 I32 (*fp3)_((int,int,int));
1848 register I32 items = SP - MARK;
1849 /* We dont worry to copy from @_. */
1854 stack_sp = mark + 1;
1855 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1856 items = (*fp3)(CvXSUBANY(cv).any_i32,
1857 MARK - stack_base + 1,
1859 stack_sp = stack_base + items;
1862 I32 markix = TOPMARK;
1867 /* Need to copy @_ to stack. Alternative may be to
1868 * switch stack to @_, and copy return values
1869 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1870 AV* av = GvAV(defgv);
1871 I32 items = AvFILL(av) + 1;
1874 /* Mark is at the end of the stack. */
1876 Copy(AvARRAY(av), sp + 1, items, SV*);
1881 if (curcopdb) { /* We assume that the first
1882 XSUB in &DB::sub is the
1888 /* Do we need to open block here? XXXX */
1889 (void)(*CvXSUB(cv))(cv);
1891 /* Enforce some sanity in scalar context. */
1892 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1893 if (markix > stack_sp - stack_base)
1894 *(stack_base + markix) = &sv_undef;
1896 *(stack_base + markix) = *stack_sp;
1897 stack_sp = stack_base + markix;
1905 register I32 items = SP - MARK;
1906 AV* padlist = CvPADLIST(cv);
1907 SV** svp = AvARRAY(padlist);
1908 push_return(op->op_next);
1909 PUSHBLOCK(cx, CXt_SUB, MARK);
1912 if (CvDEPTH(cv) < 2)
1913 (void)SvREFCNT_inc(cv);
1914 else { /* save temporaries on recursion? */
1915 if (CvDEPTH(cv) == 100 && dowarn
1916 && !(PERLDB_SUB && cv == GvCV(DBsub)))
1917 sub_crush_depth(cv);
1918 if (CvDEPTH(cv) > AvFILL(padlist)) {
1920 AV *newpad = newAV();
1921 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1922 I32 ix = AvFILL((AV*)svp[1]);
1923 svp = AvARRAY(svp[0]);
1924 for ( ;ix > 0; ix--) {
1925 if (svp[ix] != &sv_undef) {
1926 char *name = SvPVX(svp[ix]);
1927 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1928 || *name == '&') /* anonymous code? */
1930 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1932 else { /* our own lexical */
1934 av_store(newpad, ix, sv = (SV*)newAV());
1935 else if (*name == '%')
1936 av_store(newpad, ix, sv = (SV*)newHV());
1938 av_store(newpad, ix, sv = NEWSV(0,0));
1943 av_store(newpad, ix, sv = NEWSV(0,0));
1947 av = newAV(); /* will be @_ */
1949 av_store(newpad, 0, (SV*)av);
1950 AvFLAGS(av) = AVf_REIFY;
1951 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1952 AvFILL(padlist) = CvDEPTH(cv);
1953 svp = AvARRAY(padlist);
1957 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1959 AV* av = (AV*)curpad[0];
1966 cx->blk_sub.savearray = GvAV(defgv);
1967 cx->blk_sub.argarray = av;
1968 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1971 if (items > AvMAX(av) + 1) {
1973 if (AvARRAY(av) != ary) {
1974 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1975 SvPVX(av) = (char*)ary;
1977 if (items > AvMAX(av) + 1) {
1978 AvMAX(av) = items - 1;
1979 Renew(ary,items,SV*);
1981 SvPVX(av) = (char*)ary;
1984 Copy(MARK,AvARRAY(av),items,SV*);
1985 AvFILL(av) = items - 1;
1993 RETURNOP(CvSTART(cv));
2002 warn("Deep recursion on anonymous subroutine");
2004 SV* tmpstr = sv_newmortal();
2005 gv_efullname3(tmpstr, CvGV(cv), Nullch);
2006 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
2016 U32 lval = op->op_flags & OPf_MOD;
2017 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
2020 elem -= curcop->cop_arybase;
2021 if (SvTYPE(av) != SVt_PVAV)
2023 svp = av_fetch(av, elem, lval && !defer);
2025 if (!svp || *svp == &sv_undef) {
2028 DIE(no_aelem, elem);
2029 lv = sv_newmortal();
2030 sv_upgrade(lv, SVt_PVLV);
2032 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2033 LvTARG(lv) = SvREFCNT_inc(av);
2034 LvTARGOFF(lv) = elem;
2039 if (op->op_private & OPpLVAL_INTRO)
2041 else if (op->op_private & OPpDEREF)
2042 vivify_ref(*svp, op->op_private & OPpDEREF);
2044 PUSHs(svp ? *svp : &sv_undef);
2049 vivify_ref(sv, to_what)
2058 if (SvTYPE(sv) < SVt_RV)
2059 sv_upgrade(sv, SVt_RV);
2060 else if (SvTYPE(sv) >= SVt_PV) {
2061 (void)SvOOK_off(sv);
2062 Safefree(SvPVX(sv));
2063 SvLEN(sv) = SvCUR(sv) = 0;
2067 SvRV(sv) = newSV(0);
2070 SvRV(sv) = (SV*)newAV();
2073 SvRV(sv) = (SV*)newHV();
2092 name = SvPV(TOPs, na);
2093 sv = *(stack_base + TOPMARK + 1);
2104 !(packname = SvPV(sv, packlen)) ||
2105 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2106 !(ob=(SV*)GvIO(iogv)))
2108 if (!packname || !isIDFIRST(*packname))
2109 DIE("Can't call method \"%s\" without a package or object reference", name);
2110 stash = gv_stashpvn(packname, packlen, TRUE);
2113 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2116 if (!ob || !SvOBJECT(ob))
2117 DIE("Can't call method \"%s\" on unblessed reference", name);
2119 stash = SvSTASH(ob);
2122 gv = gv_fetchmethod(stash, name);
2128 for (p = name; *p; p++) {
2130 sep = p, leaf = p + 1;
2131 else if (*p == ':' && *(p + 1) == ':')
2132 sep = p, leaf = p + 2;
2134 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
2135 packname = HvNAME(sep ? curcop->cop_stash : stash);
2136 packlen = strlen(packname);
2140 packlen = sep - name;
2142 DIE("Can't locate object method \"%s\" via package \"%.*s\"",
2143 leaf, (int)packlen, packname);
2145 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);