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 && SvTYPE(hv) != SVt_PVAV)
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 || SvTYPE(sv) == SVt_PVAV) {
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 */
567 /* This bit is OK even when hv is really an AV */
569 sv_setpvf(TARG, "%ld/%ld",
570 (long)HvFILL(hv), (long)HvMAX(hv) + 1);
582 SV **lastlelem = stack_sp;
583 SV **lastrelem = stack_base + POPMARK;
584 SV **firstrelem = stack_base + POPMARK + 1;
585 SV **firstlelem = lastrelem + 1;
598 delaymagic = DM_DELAY; /* catch simultaneous items */
600 /* If there's a common identifier on both sides we have to take
601 * special care that assigning the identifier on the left doesn't
602 * clobber a value on the right that's used later in the list.
604 if (op->op_private & OPpASSIGN_COMMON) {
605 for (relem = firstrelem; relem <= lastrelem; relem++) {
608 TAINT_NOT; /* Each item is independent */
609 *relem = sv_mortalcopy(sv);
618 while (lelem <= lastlelem) {
619 TAINT_NOT; /* Each item stands on its own, taintwise. */
621 switch (SvTYPE(sv)) {
624 magic = SvMAGICAL(ary) != 0;
627 av_extend(ary, lastrelem - relem);
629 while (relem <= lastrelem) { /* gobble up all the rest */
634 (void)av_store(ary,i++,sv);
644 magic = SvMAGICAL(hash) != 0;
647 while (relem < lastrelem) { /* gobble up all the rest */
652 sv = &sv_no, relem++;
653 tmpstr = NEWSV(29,0);
655 sv_setsv(tmpstr,*relem); /* value */
657 (void)hv_store_ent(hash,sv,tmpstr,0);
662 if (relem == lastrelem)
663 warn("Odd number of elements in hash list");
667 if (SvTHINKFIRST(sv)) {
668 if (SvREADONLY(sv) && curcop != &compiling) {
669 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
671 if (relem <= lastrelem)
678 if (relem <= lastrelem) {
679 sv_setsv(sv, *relem);
683 sv_setsv(sv, &sv_undef);
688 if (delaymagic & ~DM_DELAY) {
689 if (delaymagic & DM_UID) {
691 (void)setresuid(uid,euid,(Uid_t)-1);
694 (void)setreuid(uid,euid);
697 if ((delaymagic & DM_UID) == DM_RUID) {
699 delaymagic &= ~DM_RUID;
701 # endif /* HAS_SETRUID */
703 if ((delaymagic & DM_UID) == DM_EUID) {
705 delaymagic &= ~DM_EUID;
707 # endif /* HAS_SETEUID */
708 if (delaymagic & DM_UID) {
710 DIE("No setreuid available");
713 # endif /* HAS_SETREUID */
714 #endif /* HAS_SETRESUID */
716 euid = (int)geteuid();
718 if (delaymagic & DM_GID) {
720 (void)setresgid(gid,egid,(Gid_t)-1);
723 (void)setregid(gid,egid);
726 if ((delaymagic & DM_GID) == DM_RGID) {
728 delaymagic &= ~DM_RGID;
730 # endif /* HAS_SETRGID */
732 if ((delaymagic & DM_GID) == DM_EGID) {
734 delaymagic &= ~DM_EGID;
736 # endif /* HAS_SETEGID */
737 if (delaymagic & DM_GID) {
739 DIE("No setregid available");
742 # endif /* HAS_SETREGID */
743 #endif /* HAS_SETRESGID */
745 egid = (int)getegid();
747 tainting |= (uid && (euid != uid || egid != gid));
754 else if (gimme == G_SCALAR) {
757 SETi(lastrelem - firstrelem + 1);
763 SP = firstrelem + (lastlelem - firstlelem);
764 lelem = firstlelem + (relem - firstrelem);
766 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
774 register PMOP *pm = cPMOP;
781 register REGEXP *rx = pm->op_pmregexp;
785 I32 oldsave = savestack_ix;
786 I32 update_minmatch = 1;
788 if (op->op_flags & OPf_STACKED)
797 DIE("panic: do_match");
800 if (pm->op_pmflags & PMf_USED) {
801 if (gimme == G_ARRAY)
806 if (!rx->prelen && curpm) {
808 rx = pm->op_pmregexp;
811 if (global = pm->op_pmflags & PMf_GLOBAL) {
813 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
814 MAGIC* mg = mg_find(TARG, 'g');
815 if (mg && mg->mg_len >= 0) {
816 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
817 minmatch = (mg->mg_flags & MGf_MINMATCH);
822 if (!rx->nparens && !global)
823 gimme = G_SCALAR; /* accidental array context? */
824 safebase = (((gimme == G_ARRAY) || global || !rx->nparens)
826 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
828 multiline = pm->op_pmflags & PMf_MULTILINE;
832 if (global && rx->startp[0]) {
834 if ((s + rx->minlen) > strend)
836 if (update_minmatch++)
837 minmatch = (s == rx->startp[0]);
839 if (pm->op_pmshort) {
840 if (pm->op_pmflags & PMf_SCANFIRST) {
841 if (SvSCREAM(TARG)) {
842 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
844 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
846 else if (pm->op_pmflags & PMf_ALL)
849 else if (!(s = fbm_instr((unsigned char*)s,
850 (unsigned char*)strend, pm->op_pmshort)))
852 else if (pm->op_pmflags & PMf_ALL)
854 if (s && rx->regback >= 0) {
855 ++BmUSEFUL(pm->op_pmshort);
863 else if (!multiline) {
864 if (*SvPVX(pm->op_pmshort) != *s
865 || (pm->op_pmslen > 1
866 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
869 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
870 SvREFCNT_dec(pm->op_pmshort);
871 pm->op_pmshort = Nullsv; /* opt is being useless */
874 if (pregexec(rx, s, strend, truebase, minmatch,
875 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
878 if (pm->op_pmflags & PMf_ONCE)
879 pm->op_pmflags |= PMf_USED;
887 TAINT_IF(rx->exec_tainted);
888 if (gimme == G_ARRAY) {
892 if (global && !iters)
896 EXTEND(SP, iters + i);
897 EXTEND_MORTAL(iters + i);
898 for (i = !i; i <= iters; i++) {
899 PUSHs(sv_newmortal());
901 if ((s = rx->startp[i]) && rx->endp[i] ) {
902 len = rx->endp[i] - s;
903 sv_setpvn(*SP, s, len);
907 truebase = rx->subbeg;
909 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
913 LEAVE_SCOPE(oldsave);
919 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
920 mg = mg_find(TARG, 'g');
922 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
923 mg = mg_find(TARG, 'g');
926 mg->mg_len = rx->endp[0] - rx->subbeg;
927 if (rx->startp[0] == rx->endp[0])
928 mg->mg_flags |= MGf_MINMATCH;
930 mg->mg_flags &= ~MGf_MINMATCH;
933 LEAVE_SCOPE(oldsave);
938 TAINT_IF(rx->exec_tainted);
939 ++BmUSEFUL(pm->op_pmshort);
941 if (pm->op_pmflags & PMf_ONCE)
942 pm->op_pmflags |= PMf_USED;
943 Safefree(rx->subbase);
944 rx->subbase = Nullch;
946 rx->subbeg = truebase;
949 rx->endp[0] = s + SvCUR(pm->op_pmshort);
955 tmps = rx->subbase = savepvn(t, strend-t);
957 rx->subend = tmps + (strend-t);
958 tmps = rx->startp[0] = tmps + (s - t);
959 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
961 LEAVE_SCOPE(oldsave);
966 ++BmUSEFUL(pm->op_pmshort);
969 if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
970 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
971 MAGIC* mg = mg_find(TARG, 'g');
976 LEAVE_SCOPE(oldsave);
977 if (gimme == G_ARRAY)
990 register IO *io = GvIO(last_in_gv);
991 register I32 type = op->op_type;
995 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
1000 perl_call_method("READLINE", gimme);
1003 if (gimme == G_SCALAR)
1004 SvSetMagicSV_nosteal(TARG, TOPs);
1011 if (IoFLAGS(io) & IOf_ARGV) {
1012 if (IoFLAGS(io) & IOf_START) {
1013 IoFLAGS(io) &= ~IOf_START;
1015 if (av_len(GvAVn(last_in_gv)) < 0) {
1016 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
1017 av_push(GvAVn(last_in_gv), tmpstr);
1020 fp = nextargv(last_in_gv);
1021 if (!fp) { /* Note: fp != IoIFP(io) */
1022 (void)do_close(last_in_gv, FALSE); /* now it does*/
1023 IoFLAGS(io) |= IOf_START;
1026 else if (type == OP_GLOB) {
1027 SV *tmpcmd = NEWSV(55, 0);
1031 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1032 /* since spawning off a process is a real performance hit */
1034 #include <descrip.h>
1035 #include <lib$routines.h>
1038 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1039 char vmsspec[NAM$C_MAXRSS+1];
1040 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1041 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1042 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1045 struct dsc$descriptor_s wilddsc
1046 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1047 struct dsc$descriptor_vs rsdsc
1048 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1049 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1051 /* We could find out if there's an explicit dev/dir or version
1052 by peeking into lib$find_file's internal context at
1053 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1054 but that's unsupported, so I don't want to do it now and
1055 have it bite someone in the future. */
1056 strcat(tmpfnam,tmpnam(NULL));
1057 cp = SvPV(tmpglob,i);
1059 if (cp[i] == ';') hasver = 1;
1061 if (sts) hasver = 1;
1065 hasdir = isunix = 1;
1068 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1073 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1074 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1075 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1076 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1077 &dfltdsc,NULL,NULL,NULL))&1)) {
1078 end = rstr + (unsigned long int) *rslt;
1079 if (!hasver) while (*end != ';') end--;
1080 *(end++) = '\n'; *end = '\0';
1081 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1083 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1088 while (*(--begin) != ']' && *begin != '>') ;
1091 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1093 if (cxt) (void)lib$find_file_end(&cxt);
1094 if (ok && sts != RMS$_NMF &&
1095 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1098 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1100 PerlIO_close(tmpfp);
1104 PerlIO_rewind(tmpfp);
1106 IoIFP(io) = fp = tmpfp;
1107 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
1114 sv_setpv(tmpcmd, "for a in ");
1115 sv_catsv(tmpcmd, tmpglob);
1116 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1118 sv_setpv(tmpcmd, "perlglob ");
1119 sv_catsv(tmpcmd, tmpglob);
1120 sv_catpv(tmpcmd, " |");
1124 sv_setpvn(tmpcmd, cshname, cshlen);
1125 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1126 sv_catsv(tmpcmd, tmpglob);
1127 sv_catpv(tmpcmd, "' 2>/dev/null |");
1129 sv_setpv(tmpcmd, "echo ");
1130 sv_catsv(tmpcmd, tmpglob);
1132 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1134 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1137 #endif /* !DOSISH */
1138 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1139 FALSE, 0, 0, Nullfp);
1145 else if (type == OP_GLOB)
1149 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1150 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1151 if (gimme == G_SCALAR) {
1152 (void)SvOK_off(TARG);
1157 if (gimme == G_SCALAR) {
1161 (void)SvUPGRADE(sv, SVt_PV);
1162 tmplen = SvLEN(sv); /* remember if already alloced */
1164 Sv_Grow(sv, 80); /* try short-buffering it */
1165 if (type == OP_RCATLINE)
1171 sv = sv_2mortal(NEWSV(57, 80));
1175 if (!sv_gets(sv, fp, offset)) {
1176 PerlIO_clearerr(fp);
1177 if (IoFLAGS(io) & IOf_ARGV) {
1178 fp = nextargv(last_in_gv);
1181 (void)do_close(last_in_gv, FALSE);
1182 IoFLAGS(io) |= IOf_START;
1184 else if (type == OP_GLOB) {
1185 if (do_close(last_in_gv, FALSE) & ~0xFF)
1186 warn("internal error: glob failed");
1188 if (gimme == G_SCALAR) {
1189 (void)SvOK_off(TARG);
1194 /* This should not be marked tainted if the fp is marked clean */
1195 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1202 if (type == OP_GLOB) {
1205 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1206 tmps = SvEND(sv) - 1;
1207 if (*tmps == *SvPVX(rs)) {
1212 for (tmps = SvPVX(sv); *tmps; tmps++)
1213 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1214 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1216 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1217 (void)POPs; /* Unmatched wildcard? Chuck it... */
1221 if (gimme == G_ARRAY) {
1222 if (SvLEN(sv) - SvCUR(sv) > 20) {
1223 SvLEN_set(sv, SvCUR(sv)+1);
1224 Renew(SvPVX(sv), SvLEN(sv), char);
1226 sv = sv_2mortal(NEWSV(58, 80));
1229 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1230 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1234 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1235 Renew(SvPVX(sv), SvLEN(sv), char);
1244 register CONTEXT *cx;
1245 I32 gimme = OP_GIMME(op, -1);
1248 if (cxstack_ix >= 0)
1249 gimme = cxstack[cxstack_ix].blk_gimme;
1257 PUSHBLOCK(cx, CXt_BLOCK, sp);
1269 U32 lval = op->op_flags & OPf_MOD;
1270 U32 defer = op->op_private & OPpLVAL_DEFER;
1272 if (SvTYPE(hv) == SVt_PVHV) {
1273 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
1274 svp = he ? &HeVAL(he) : 0;
1276 else if (SvTYPE(hv) == SVt_PVAV) {
1277 svp = avhv_fetch_ent((AV*)hv, keysv, lval && !defer, 0);
1283 if (!svp || *svp == &sv_undef) {
1287 DIE(no_helem, SvPV(keysv, na));
1288 lv = sv_newmortal();
1289 sv_upgrade(lv, SVt_PVLV);
1291 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1292 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1293 LvTARG(lv) = SvREFCNT_inc(hv);
1298 if (op->op_private & OPpLVAL_INTRO) {
1299 if (HvNAME(hv) && isGV(*svp))
1300 save_gp((GV*)*svp, !(op->op_flags & OPf_SPECIAL));
1304 else if (op->op_private & OPpDEREF)
1305 vivify_ref(*svp, op->op_private & OPpDEREF);
1307 PUSHs(svp ? *svp : &sv_undef);
1314 register CONTEXT *cx;
1320 if (op->op_flags & OPf_SPECIAL) {
1321 cx = &cxstack[cxstack_ix];
1322 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1327 gimme = OP_GIMME(op, -1);
1329 if (cxstack_ix >= 0)
1330 gimme = cxstack[cxstack_ix].blk_gimme;
1336 if (gimme == G_VOID)
1338 else if (gimme == G_SCALAR) {
1341 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1344 *MARK = sv_mortalcopy(TOPs);
1351 else if (gimme == G_ARRAY) {
1352 /* in case LEAVE wipes old return values */
1353 for (mark = newsp + 1; mark <= SP; mark++) {
1354 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
1355 *mark = sv_mortalcopy(*mark);
1356 TAINT_NOT; /* Each item is independent */
1360 curpm = newpm; /* Don't pop $1 et al till now */
1370 register CONTEXT *cx;
1375 cx = &cxstack[cxstack_ix];
1376 if (cx->cx_type != CXt_LOOP)
1377 DIE("panic: pp_iter");
1379 av = cx->blk_loop.iterary;
1380 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1383 SvREFCNT_dec(*cx->blk_loop.itervar);
1385 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1389 if (av != curstack && SvIMMORTAL(sv)) {
1390 SV *lv = cx->blk_loop.iterlval;
1391 if (lv && SvREFCNT(lv) > 1) {
1396 SvREFCNT_dec(LvTARG(lv));
1398 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
1399 sv_upgrade(lv, SVt_PVLV);
1401 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1403 LvTARG(lv) = SvREFCNT_inc(av);
1404 LvTARGOFF(lv) = cx->blk_loop.iterix;
1409 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1416 register PMOP *pm = cPMOP;
1432 register REGEXP *rx = pm->op_pmregexp;
1434 int force_on_match = 0;
1435 I32 oldsave = savestack_ix;
1437 /* known replacement string? */
1438 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
1439 if (op->op_flags & OPf_STACKED)
1445 if (SvREADONLY(TARG)
1446 || (SvTYPE(TARG) > SVt_PVLV
1447 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1449 s = SvPV(TARG, len);
1450 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
1456 DIE("panic: do_subst");
1459 maxiters = (strend - s) + 10;
1461 if (!rx->prelen && curpm) {
1463 rx = pm->op_pmregexp;
1465 safebase = (!rx->nparens && !sawampersand);
1466 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1468 multiline = pm->op_pmflags & PMf_MULTILINE;
1471 if (pm->op_pmshort) {
1472 if (pm->op_pmflags & PMf_SCANFIRST) {
1473 if (SvSCREAM(TARG)) {
1474 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1476 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1479 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1482 if (s && rx->regback >= 0) {
1483 ++BmUSEFUL(pm->op_pmshort);
1491 else if (!multiline) {
1492 if (*SvPVX(pm->op_pmshort) != *s
1493 || (pm->op_pmslen > 1
1494 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1497 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1498 SvREFCNT_dec(pm->op_pmshort);
1499 pm->op_pmshort = Nullsv; /* opt is being useless */
1503 /* only replace once? */
1504 once = !(rpm->op_pmflags & PMf_GLOBAL);
1506 /* known replacement string? */
1507 c = dstr ? SvPV(dstr, clen) : Nullch;
1509 /* can do inplace substitution? */
1510 if (c && clen <= rx->minlen && safebase) {
1511 if (! pregexec(rx, s, strend, orig, 0,
1512 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1514 LEAVE_SCOPE(oldsave);
1517 if (force_on_match) {
1519 s = SvPV_force(TARG, len);
1524 SvSCREAM_off(TARG); /* disable possible screamer */
1526 rxtainted = rx->exec_tainted;
1530 if (m - s > strend - d) { /* faster to shorten from end */
1532 Copy(c, m, clen, char);
1537 Move(d, m, i, char);
1541 SvCUR_set(TARG, m - s);
1544 else if (i = m - s) { /* faster from front */
1552 Copy(c, m, clen, char);
1557 Copy(c, d, clen, char);
1562 TAINT_IF(rxtainted);
1568 if (iters++ > maxiters)
1569 DIE("Substitution loop");
1570 rxtainted |= rx->exec_tainted;
1575 Move(s, d, i, char);
1579 Copy(c, d, clen, char);
1583 } while (pregexec(rx, s, strend, orig, s == m,
1584 Nullsv, TRUE)); /* don't match same null twice */
1587 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1588 Move(s, d, i+1, char); /* include the NUL */
1590 TAINT_IF(rxtainted);
1591 PUSHs(sv_2mortal(newSViv((I32)iters)));
1593 (void)SvPOK_only(TARG);
1596 LEAVE_SCOPE(oldsave);
1600 if (pregexec(rx, s, strend, orig, 0,
1601 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1602 if (force_on_match) {
1604 s = SvPV_force(TARG, len);
1607 rxtainted = rx->exec_tainted;
1608 dstr = NEWSV(25, sv_len(TARG));
1609 sv_setpvn(dstr, m, s-m);
1612 register CONTEXT *cx;
1614 RETURNOP(cPMOP->op_pmreplroot);
1617 if (iters++ > maxiters)
1618 DIE("Substitution loop");
1619 rxtainted |= rx->exec_tainted;
1620 if (rx->subbase && rx->subbase != orig) {
1625 strend = s + (strend - m);
1628 sv_catpvn(dstr, s, m-s);
1631 sv_catpvn(dstr, c, clen);
1634 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1635 sv_catpvn(dstr, s, strend - s);
1637 TAINT_IF(rxtainted);
1639 (void)SvOOK_off(TARG);
1640 Safefree(SvPVX(TARG));
1641 SvPVX(TARG) = SvPVX(dstr);
1642 SvCUR_set(TARG, SvCUR(dstr));
1643 SvLEN_set(TARG, SvLEN(dstr));
1647 (void)SvPOK_only(TARG);
1650 PUSHs(sv_2mortal(newSViv((I32)iters)));
1651 LEAVE_SCOPE(oldsave);
1657 ++BmUSEFUL(pm->op_pmshort);
1661 LEAVE_SCOPE(oldsave);
1670 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1672 LEAVE; /* exit inner scope */
1675 if (stack_base + *markstack_ptr > sp) {
1677 I32 gimme = GIMME_V;
1679 LEAVE; /* exit outer scope */
1680 (void)POPMARK; /* pop src */
1681 items = --*markstack_ptr - markstack_ptr[-1];
1682 (void)POPMARK; /* pop dst */
1683 SP = stack_base + POPMARK; /* pop original mark */
1684 if (gimme == G_SCALAR) {
1688 else if (gimme == G_ARRAY)
1695 ENTER; /* enter inner scope */
1698 src = stack_base[*markstack_ptr];
1702 RETURNOP(cLOGOP->op_other);
1713 register CONTEXT *cx;
1714 struct block_sub cxsub;
1717 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1720 if (gimme == G_SCALAR) {
1723 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1730 else if (gimme == G_ARRAY) {
1731 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1732 if (!SvTEMP(*MARK)) {
1733 *MARK = sv_mortalcopy(*MARK);
1734 TAINT_NOT; /* Each item is independent */
1740 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1741 curpm = newpm; /* ... and pop $1 et al */
1744 return pop_return();
1753 register CONTEXT *cx;
1755 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1758 DIE("Not a CODE reference");
1759 switch (SvTYPE(sv)) {
1764 if (sv == &sv_yes) /* unfound import, ignore */
1766 if (SvGMAGICAL(sv)) {
1768 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1773 DIE(no_usym, "a subroutine");
1774 if (op->op_private & HINT_STRICT_REFS)
1775 DIE(no_symref, sym, "a subroutine");
1776 cv = perl_get_cv(sym, TRUE);
1780 if (SvTYPE(cv) == SVt_PVCV)
1785 DIE("Not a CODE reference");
1790 if (!(cv = GvCVu((GV*)sv)))
1791 cv = sv_2cv(sv, &stash, &gv, TRUE);
1800 DIE("Not a CODE reference");
1802 if (!CvROOT(cv) && !CvXSUB(cv)) {
1806 /* anonymous or undef'd function leaves us no recourse */
1807 if (CvANON(cv) || !(gv = CvGV(cv)))
1808 DIE("Undefined subroutine called");
1809 /* autoloaded stub? */
1810 if (cv != GvCV(gv)) {
1814 /* should call AUTOLOAD now? */
1815 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1822 subname = sv_newmortal();
1823 gv_efullname3(subname, gv, Nullch);
1824 DIE("Undefined subroutine &%s called", SvPVX(subname));
1828 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1833 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1834 || strEQ(GvNAME(gv), "END")
1835 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1836 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1837 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1838 /* GV is potentially non-unique, or contain different CV. */
1839 sv_setsv(sv, newRV((SV*)cv));
1842 gv_efullname3(sv, gv, Nullch);
1845 if (CvXSUB(cv)) curcopdb = curcop;
1847 DIE("No DBsub routine");
1851 if (CvOLDSTYLE(cv)) {
1852 I32 (*fp3)_((int,int,int));
1854 register I32 items = SP - MARK;
1855 /* We dont worry to copy from @_. */
1860 stack_sp = mark + 1;
1861 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1862 items = (*fp3)(CvXSUBANY(cv).any_i32,
1863 MARK - stack_base + 1,
1865 stack_sp = stack_base + items;
1868 I32 markix = TOPMARK;
1873 /* Need to copy @_ to stack. Alternative may be to
1874 * switch stack to @_, and copy return values
1875 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1876 AV* av = GvAV(defgv);
1877 I32 items = AvFILL(av) + 1;
1880 /* Mark is at the end of the stack. */
1882 Copy(AvARRAY(av), sp + 1, items, SV*);
1887 if (curcopdb) { /* We assume that the first
1888 XSUB in &DB::sub is the
1894 /* Do we need to open block here? XXXX */
1895 (void)(*CvXSUB(cv))(cv);
1897 /* Enforce some sanity in scalar context. */
1898 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1899 if (markix > stack_sp - stack_base)
1900 *(stack_base + markix) = &sv_undef;
1902 *(stack_base + markix) = *stack_sp;
1903 stack_sp = stack_base + markix;
1911 register I32 items = SP - MARK;
1912 AV* padlist = CvPADLIST(cv);
1913 SV** svp = AvARRAY(padlist);
1914 push_return(op->op_next);
1915 PUSHBLOCK(cx, CXt_SUB, MARK);
1918 if (CvDEPTH(cv) < 2)
1919 (void)SvREFCNT_inc(cv);
1920 else { /* save temporaries on recursion? */
1921 if (CvDEPTH(cv) == 100 && dowarn
1922 && !(perldb && cv == GvCV(DBsub)))
1923 sub_crush_depth(cv);
1924 if (CvDEPTH(cv) > AvFILL(padlist)) {
1926 AV *newpad = newAV();
1927 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1928 I32 ix = AvFILL((AV*)svp[1]);
1929 svp = AvARRAY(svp[0]);
1930 for ( ;ix > 0; ix--) {
1931 if (svp[ix] != &sv_undef) {
1932 char *name = SvPVX(svp[ix]);
1933 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1934 || *name == '&') /* anonymous code? */
1936 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1938 else { /* our own lexical */
1940 av_store(newpad, ix, sv = (SV*)newAV());
1941 else if (*name == '%')
1942 av_store(newpad, ix, sv = (SV*)newHV());
1944 av_store(newpad, ix, sv = NEWSV(0,0));
1949 av_store(newpad, ix, sv = NEWSV(0,0));
1953 av = newAV(); /* will be @_ */
1955 av_store(newpad, 0, (SV*)av);
1956 AvFLAGS(av) = AVf_REIFY;
1957 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1958 AvFILL(padlist) = CvDEPTH(cv);
1959 svp = AvARRAY(padlist);
1963 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1965 AV* av = (AV*)curpad[0];
1972 cx->blk_sub.savearray = GvAV(defgv);
1973 cx->blk_sub.argarray = av;
1974 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1977 if (items > AvMAX(av) + 1) {
1979 if (AvARRAY(av) != ary) {
1980 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1981 SvPVX(av) = (char*)ary;
1983 if (items > AvMAX(av) + 1) {
1984 AvMAX(av) = items - 1;
1985 Renew(ary,items,SV*);
1987 SvPVX(av) = (char*)ary;
1990 Copy(MARK,AvARRAY(av),items,SV*);
1991 AvFILL(av) = items - 1;
1999 RETURNOP(CvSTART(cv));
2008 warn("Deep recursion on anonymous subroutine");
2010 SV* tmpstr = sv_newmortal();
2011 gv_efullname3(tmpstr, CvGV(cv), Nullch);
2012 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
2022 U32 lval = op->op_flags & OPf_MOD;
2023 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
2026 elem -= curcop->cop_arybase;
2027 if (SvTYPE(av) != SVt_PVAV)
2029 svp = av_fetch(av, elem, lval && !defer);
2031 if (!svp || *svp == &sv_undef) {
2034 DIE(no_aelem, elem);
2035 lv = sv_newmortal();
2036 sv_upgrade(lv, SVt_PVLV);
2038 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2039 LvTARG(lv) = SvREFCNT_inc(av);
2040 LvTARGOFF(lv) = elem;
2045 if (op->op_private & OPpLVAL_INTRO)
2047 else if (op->op_private & OPpDEREF)
2048 vivify_ref(*svp, op->op_private & OPpDEREF);
2050 PUSHs(svp ? *svp : &sv_undef);
2055 vivify_ref(sv, to_what)
2064 if (SvTYPE(sv) < SVt_RV)
2065 sv_upgrade(sv, SVt_RV);
2066 else if (SvTYPE(sv) >= SVt_PV) {
2067 (void)SvOOK_off(sv);
2068 Safefree(SvPVX(sv));
2069 SvLEN(sv) = SvCUR(sv) = 0;
2073 SvRV(sv) = newSV(0);
2076 SvRV(sv) = (SV*)newAV();
2079 SvRV(sv) = (SV*)newHV();
2098 name = SvPV(TOPs, na);
2099 sv = *(stack_base + TOPMARK + 1);
2110 !(packname = SvPV(sv, packlen)) ||
2111 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2112 !(ob=(SV*)GvIO(iogv)))
2114 if (!packname || !isIDFIRST(*packname))
2115 DIE("Can't call method \"%s\" without a package or object reference", name);
2116 stash = gv_stashpvn(packname, packlen, TRUE);
2119 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2122 if (!ob || !SvOBJECT(ob))
2123 DIE("Can't call method \"%s\" on unblessed reference", name);
2125 stash = SvSTASH(ob);
2128 gv = gv_fetchmethod(stash, name);
2134 for (p = name; *p; p++) {
2136 sep = p, leaf = p + 1;
2137 else if (*p == ':' && *(p + 1) == ':')
2138 sep = p, leaf = p + 2;
2140 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
2141 packname = HvNAME(sep ? curcop->cop_stash : stash);
2142 packlen = strlen(packname);
2146 packlen = sep - name;
2148 DIE("Can't locate object method \"%s\" via package \"%.*s\"",
2149 leaf, (int)packlen, packname);
2151 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);