3 * Copyright (c) 1991-1997, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
14 * Awake! Awake! Fear, Fire, Foes! Awake!
33 TAINT_NOT; /* Each statement is presumed innocent */
34 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
43 if (op->op_private & OPpLVAL_INTRO)
44 PUSHs(save_scalar(cGVOP->op_gv));
46 PUSHs(GvSV(cGVOP->op_gv));
67 sv_setpvn(TARG,s,len);
75 XPUSHs((SV*)cGVOP->op_gv);
92 switch (elem ? *elem : '\0')
95 if (strEQ(elem, "ARRAY"))
99 if (strEQ(elem, "CODE"))
100 ref = (SV*)GvCVu(gv);
103 if (strEQ(elem, "FILEHANDLE")) /* XXX deprecate in 5.005 */
104 ref = (SV*)GvIOp(gv);
107 if (strEQ(elem, "GLOB"))
111 if (strEQ(elem, "HASH"))
115 if (strEQ(elem, "IO"))
116 ref = (SV*)GvIOp(gv);
119 if (strEQ(elem, "NAME"))
120 sv = newSVpv(GvNAME(gv), GvNAMELEN(gv));
123 if (strEQ(elem, "PACKAGE"))
124 sv = newSVpv(HvNAME(GvSTASH(gv)), 0);
127 if (strEQ(elem, "SCALAR"))
148 RETURNOP(cLOGOP->op_other);
157 if (op->op_private & OPpASSIGN_BACKWARDS) {
159 temp = left; left = right; right = temp;
161 if (tainting && tainted && !SvTAINTED(left))
163 SvSetMagicSV(right, left);
172 RETURNOP(cCONDOP->op_true);
174 RETURNOP(cCONDOP->op_false);
180 TAINT_NOT; /* Each statement is presumed innocent */
181 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
183 oldsave = scopestack[scopestack_ix - 1];
184 LEAVE_SCOPE(oldsave);
190 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
197 sv_setpvn(TARG,s,len);
199 else if (SvGMAGICAL(TARG))
201 else if (!SvOK(TARG) && SvTYPE(TARG) <= SVt_PVMG) {
202 sv_setpv(TARG, ""); /* Suppress warning. */
203 s = SvPV_force(TARG, len);
207 sv_catpvn(TARG,s,len);
209 sv_setpvn(TARG,s,len); /* suppress warning */
219 if (op->op_flags & OPf_MOD) {
220 if (op->op_private & OPpLVAL_INTRO)
221 SAVECLEARSV(curpad[op->op_targ]);
222 else if (op->op_private & OPpDEREF)
223 vivify_ref(curpad[op->op_targ], op->op_private & OPpDEREF);
230 last_in_gv = (GV*)(*stack_sp--);
231 return do_readline();
236 dSP; tryAMAGICbinSET(eq,0);
239 SETs(boolSV(TOPn == value));
247 if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
249 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
250 SvIVX(TOPs) != IV_MAX)
253 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
268 RETURNOP(cLOGOP->op_other);
274 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
277 SETn( left + right );
285 AV *av = GvAV((GV*)cSVOP->op_sv);
286 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
287 PUSHs(svp ? *svp : &sv_undef);
295 do_join(TARG, *MARK, MARK, SP);
306 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
307 * will be enough to hold an OP*.
309 SV* sv = sv_newmortal();
310 sv_upgrade(sv, SVt_PVLV);
312 Copy(&op, &LvTARGOFF(sv), 1, OP*);
320 /* Oversized hot code. */
324 dSP; dMARK; dORIGMARK;
330 if (op->op_flags & OPf_STACKED)
334 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
335 if (MARK == ORIGMARK) {
338 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
345 perl_call_method("PRINT", G_SCALAR);
353 if (!(io = GvIO(gv))) {
355 SV* sv = sv_newmortal();
356 gv_fullname3(sv, gv, Nullch);
357 warn("Filehandle %s never opened", SvPV(sv,na));
360 SETERRNO(EBADF,RMS$_IFI);
363 else if (!(fp = IoOFP(io))) {
365 SV* sv = sv_newmortal();
366 gv_fullname3(sv, gv, Nullch);
368 warn("Filehandle %s opened only for input", SvPV(sv,na));
370 warn("print on closed filehandle %s", SvPV(sv,na));
372 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
379 if (!do_print(*MARK, fp))
383 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
392 if (!do_print(*MARK, fp))
401 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
404 if (IoFLAGS(io) & IOf_FLUSH)
405 if (PerlIO_flush(fp) == EOF)
427 if (SvTYPE(av) != SVt_PVAV)
428 DIE("Not an ARRAY reference");
429 if (op->op_private & OPpLVAL_INTRO)
430 av = (AV*)save_svref((SV**)sv);
431 if (op->op_flags & OPf_REF) {
437 if (SvTYPE(sv) == SVt_PVAV) {
439 if (op->op_flags & OPf_REF) {
447 if (SvTYPE(sv) != SVt_PVGV) {
450 if (SvGMAGICAL(sv)) {
456 if (op->op_flags & OPf_REF ||
457 op->op_private & HINT_STRICT_REFS)
458 DIE(no_usym, "an ARRAY");
461 if (GIMME == G_ARRAY)
466 if (op->op_private & HINT_STRICT_REFS)
467 DIE(no_symref, sym, "an ARRAY");
468 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
473 if (op->op_private & OPpLVAL_INTRO)
475 if (op->op_flags & OPf_REF) {
482 if (GIMME == G_ARRAY) {
483 I32 maxarg = AvFILL(av) + 1;
485 Copy(AvARRAY(av), SP+1, maxarg, SV*);
490 I32 maxarg = AvFILL(av) + 1;
504 if (SvTYPE(hv) != SVt_PVHV)
505 DIE("Not a HASH reference");
506 if (op->op_private & OPpLVAL_INTRO)
507 hv = (HV*)save_svref((SV**)sv);
508 if (op->op_flags & OPf_REF) {
514 if (SvTYPE(sv) == SVt_PVHV) {
516 if (op->op_flags & OPf_REF) {
524 if (SvTYPE(sv) != SVt_PVGV) {
527 if (SvGMAGICAL(sv)) {
533 if (op->op_flags & OPf_REF ||
534 op->op_private & HINT_STRICT_REFS)
535 DIE(no_usym, "a HASH");
538 if (GIMME == G_ARRAY) {
545 if (op->op_private & HINT_STRICT_REFS)
546 DIE(no_symref, sym, "a HASH");
547 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
552 if (op->op_private & OPpLVAL_INTRO)
554 if (op->op_flags & OPf_REF) {
561 if (GIMME == G_ARRAY) { /* array wanted */
568 sprintf(buf, "%ld/%ld", (long)HvFILL(hv), (long)HvMAX(hv)+1);
581 SV **lastlelem = stack_sp;
582 SV **lastrelem = stack_base + POPMARK;
583 SV **firstrelem = stack_base + POPMARK + 1;
584 SV **firstlelem = lastrelem + 1;
597 delaymagic = DM_DELAY; /* catch simultaneous items */
599 /* If there's a common identifier on both sides we have to take
600 * special care that assigning the identifier on the left doesn't
601 * clobber a value on the right that's used later in the list.
603 if (op->op_private & OPpASSIGN_COMMON) {
604 for (relem = firstrelem; relem <= lastrelem; relem++) {
607 *relem = sv_mortalcopy(sv);
615 while (lelem <= lastlelem) {
616 TAINT_NOT; /* Each item stands on its own, taintwise. */
618 switch (SvTYPE(sv)) {
621 magic = SvMAGICAL(ary) != 0;
624 av_extend(ary, lastrelem - relem);
626 while (relem <= lastrelem) { /* gobble up all the rest */
631 (void)av_store(ary,i++,sv);
641 magic = SvMAGICAL(hash) != 0;
644 while (relem < lastrelem) { /* gobble up all the rest */
649 sv = &sv_no, relem++;
650 tmpstr = NEWSV(29,0);
652 sv_setsv(tmpstr,*relem); /* value */
654 (void)hv_store_ent(hash,sv,tmpstr,0);
659 if (relem == lastrelem)
660 warn("Odd number of elements in hash list");
664 if (SvTHINKFIRST(sv)) {
665 if (SvREADONLY(sv) && curcop != &compiling) {
666 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
668 if (relem <= lastrelem)
675 if (relem <= lastrelem) {
676 sv_setsv(sv, *relem);
680 sv_setsv(sv, &sv_undef);
685 if (delaymagic & ~DM_DELAY) {
686 if (delaymagic & DM_UID) {
688 (void)setresuid(uid,euid,(Uid_t)-1);
691 (void)setreuid(uid,euid);
694 if ((delaymagic & DM_UID) == DM_RUID) {
696 delaymagic &= ~DM_RUID;
698 # endif /* HAS_SETRUID */
700 if ((delaymagic & DM_UID) == DM_EUID) {
702 delaymagic &= ~DM_EUID;
704 # endif /* HAS_SETEUID */
705 if (delaymagic & DM_UID) {
707 DIE("No setreuid available");
710 # endif /* HAS_SETREUID */
711 #endif /* HAS_SETRESUID */
713 euid = (int)geteuid();
715 if (delaymagic & DM_GID) {
717 (void)setresgid(gid,egid,(Gid_t)-1);
720 (void)setregid(gid,egid);
723 if ((delaymagic & DM_GID) == DM_RGID) {
725 delaymagic &= ~DM_RGID;
727 # endif /* HAS_SETRGID */
729 if ((delaymagic & DM_GID) == DM_EGID) {
731 delaymagic &= ~DM_EGID;
733 # endif /* HAS_SETEGID */
734 if (delaymagic & DM_GID) {
736 DIE("No setregid available");
739 # endif /* HAS_SETREGID */
740 #endif /* HAS_SETRESGID */
742 egid = (int)getegid();
744 tainting |= (uid && (euid != uid || egid != gid));
751 else if (gimme == G_SCALAR) {
754 SETi(lastrelem - firstrelem + 1);
760 SP = firstrelem + (lastlelem - firstlelem);
761 lelem = firstlelem + (relem - firstrelem);
763 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
771 register PMOP *pm = cPMOP;
778 register REGEXP *rx = pm->op_pmregexp;
782 I32 oldsave = savestack_ix;
783 I32 update_minmatch = 1;
785 if (op->op_flags & OPf_STACKED)
794 DIE("panic: do_match");
797 if (pm->op_pmflags & PMf_USED) {
798 if (gimme == G_ARRAY)
803 if (!rx->prelen && curpm) {
805 rx = pm->op_pmregexp;
808 if (global = pm->op_pmflags & PMf_GLOBAL) {
810 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
811 MAGIC* mg = mg_find(TARG, 'g');
812 if (mg && mg->mg_len >= 0) {
813 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
814 minmatch = (mg->mg_flags & MGf_MINMATCH);
819 if (!rx->nparens && !global)
820 gimme = G_SCALAR; /* accidental array context? */
821 safebase = (((gimme == G_ARRAY) || global) && !sawampersand);
822 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
824 multiline = pm->op_pmflags & PMf_MULTILINE;
828 if (global && rx->startp[0]) {
830 if ((s + rx->minlen) > strend)
832 if (update_minmatch++)
833 minmatch = (s == rx->startp[0]);
835 if (pm->op_pmshort) {
836 if (pm->op_pmflags & PMf_SCANFIRST) {
837 if (SvSCREAM(TARG)) {
838 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
840 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
842 else if (pm->op_pmflags & PMf_ALL)
845 else if (!(s = fbm_instr((unsigned char*)s,
846 (unsigned char*)strend, pm->op_pmshort)))
848 else if (pm->op_pmflags & PMf_ALL)
850 if (s && rx->regback >= 0) {
851 ++BmUSEFUL(pm->op_pmshort);
859 else if (!multiline) {
860 if (*SvPVX(pm->op_pmshort) != *s
861 || (pm->op_pmslen > 1
862 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
865 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
866 SvREFCNT_dec(pm->op_pmshort);
867 pm->op_pmshort = Nullsv; /* opt is being useless */
870 if (pregexec(rx, s, strend, truebase, minmatch,
871 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
874 if (pm->op_pmflags & PMf_ONCE)
875 pm->op_pmflags |= PMf_USED;
883 TAINT_IF(rx->exec_tainted);
884 if (gimme == G_ARRAY) {
888 if (global && !iters)
892 EXTEND(SP, iters + i);
893 EXTEND_MORTAL(iters + i);
894 for (i = !i; i <= iters; i++) {
895 PUSHs(sv_newmortal());
897 if ((s = rx->startp[i]) && rx->endp[i] ) {
898 len = rx->endp[i] - s;
899 sv_setpvn(*SP, s, len);
903 truebase = rx->subbeg;
905 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
909 LEAVE_SCOPE(oldsave);
915 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
916 mg = mg_find(TARG, 'g');
918 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
919 mg = mg_find(TARG, 'g');
922 mg->mg_len = rx->endp[0] - rx->subbeg;
923 if (rx->startp[0] == rx->endp[0])
924 mg->mg_flags |= MGf_MINMATCH;
926 mg->mg_flags &= ~MGf_MINMATCH;
929 LEAVE_SCOPE(oldsave);
934 TAINT_IF(rx->exec_tainted);
935 ++BmUSEFUL(pm->op_pmshort);
937 if (pm->op_pmflags & PMf_ONCE)
938 pm->op_pmflags |= PMf_USED;
939 Safefree(rx->subbase);
940 rx->subbase = Nullch;
942 rx->subbeg = truebase;
945 rx->endp[0] = s + SvCUR(pm->op_pmshort);
951 tmps = rx->subbase = savepvn(t, strend-t);
953 rx->subend = tmps + (strend-t);
954 tmps = rx->startp[0] = tmps + (s - t);
955 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
957 LEAVE_SCOPE(oldsave);
962 ++BmUSEFUL(pm->op_pmshort);
965 LEAVE_SCOPE(oldsave);
966 if (gimme == G_ARRAY)
979 register IO *io = GvIO(last_in_gv);
980 register I32 type = op->op_type;
984 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
989 perl_call_method("READLINE", gimme);
992 if (gimme == G_SCALAR)
993 SvSetMagicSV_nosteal(TARG, TOPs);
1000 if (IoFLAGS(io) & IOf_ARGV) {
1001 if (IoFLAGS(io) & IOf_START) {
1002 IoFLAGS(io) &= ~IOf_START;
1004 if (av_len(GvAVn(last_in_gv)) < 0) {
1005 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
1006 av_push(GvAVn(last_in_gv), tmpstr);
1009 fp = nextargv(last_in_gv);
1010 if (!fp) { /* Note: fp != IoIFP(io) */
1011 (void)do_close(last_in_gv, FALSE); /* now it does*/
1012 IoFLAGS(io) |= IOf_START;
1015 else if (type == OP_GLOB) {
1016 SV *tmpcmd = NEWSV(55, 0);
1020 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1021 /* since spawning off a process is a real performance hit */
1023 #include <descrip.h>
1024 #include <lib$routines.h>
1027 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1028 char vmsspec[NAM$C_MAXRSS+1];
1029 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1030 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1031 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1034 struct dsc$descriptor_s wilddsc
1035 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1036 struct dsc$descriptor_vs rsdsc
1037 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1038 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1040 /* We could find out if there's an explicit dev/dir or version
1041 by peeking into lib$find_file's internal context at
1042 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1043 but that's unsupported, so I don't want to do it now and
1044 have it bite someone in the future. */
1045 strcat(tmpfnam,tmpnam(NULL));
1046 cp = SvPV(tmpglob,i);
1048 if (cp[i] == ';') hasver = 1;
1050 if (sts) hasver = 1;
1054 hasdir = isunix = 1;
1057 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1062 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1063 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1064 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1065 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1066 &dfltdsc,NULL,NULL,NULL))&1)) {
1067 end = rstr + (unsigned long int) *rslt;
1068 if (!hasver) while (*end != ';') end--;
1069 *(end++) = '\n'; *end = '\0';
1070 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1072 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
1077 while (*(--begin) != ']' && *begin != '>') ;
1080 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1082 if (cxt) (void)lib$find_file_end(&cxt);
1083 if (ok && sts != RMS$_NMF &&
1084 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1087 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1089 PerlIO_close(tmpfp);
1093 PerlIO_rewind(tmpfp);
1095 IoIFP(io) = fp = tmpfp;
1096 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
1103 sv_setpv(tmpcmd, "for a in ");
1104 sv_catsv(tmpcmd, tmpglob);
1105 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1107 sv_setpv(tmpcmd, "perlglob ");
1108 sv_catsv(tmpcmd, tmpglob);
1109 sv_catpv(tmpcmd, " |");
1113 sv_setpvn(tmpcmd, cshname, cshlen);
1114 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1115 sv_catsv(tmpcmd, tmpglob);
1116 sv_catpv(tmpcmd, "' 2>/dev/null |");
1118 sv_setpv(tmpcmd, "echo ");
1119 sv_catsv(tmpcmd, tmpglob);
1121 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1123 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1126 #endif /* !DOSISH */
1127 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1128 FALSE, 0, 0, Nullfp);
1134 else if (type == OP_GLOB)
1138 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1139 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1140 if (gimme == G_SCALAR) {
1141 (void)SvOK_off(TARG);
1146 if (gimme == G_SCALAR) {
1150 (void)SvUPGRADE(sv, SVt_PV);
1151 tmplen = SvLEN(sv); /* remember if already alloced */
1153 Sv_Grow(sv, 80); /* try short-buffering it */
1154 if (type == OP_RCATLINE)
1160 sv = sv_2mortal(NEWSV(57, 80));
1164 if (!sv_gets(sv, fp, offset)) {
1165 PerlIO_clearerr(fp);
1166 if (IoFLAGS(io) & IOf_ARGV) {
1167 fp = nextargv(last_in_gv);
1170 (void)do_close(last_in_gv, FALSE);
1171 IoFLAGS(io) |= IOf_START;
1173 else if (type == OP_GLOB) {
1174 if (do_close(last_in_gv, FALSE) & ~0xFF)
1175 warn("internal error: glob failed");
1177 if (gimme == G_SCALAR) {
1178 (void)SvOK_off(TARG);
1183 /* This should not be marked tainted if the fp is marked clean */
1184 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1191 if (type == OP_GLOB) {
1194 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1195 tmps = SvEND(sv) - 1;
1196 if (*tmps == *SvPVX(rs)) {
1201 for (tmps = SvPVX(sv); *tmps; tmps++)
1202 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1203 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1205 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1206 (void)POPs; /* Unmatched wildcard? Chuck it... */
1210 if (gimme == G_ARRAY) {
1211 if (SvLEN(sv) - SvCUR(sv) > 20) {
1212 SvLEN_set(sv, SvCUR(sv)+1);
1213 Renew(SvPVX(sv), SvLEN(sv), char);
1215 sv = sv_2mortal(NEWSV(58, 80));
1218 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1219 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1223 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1224 Renew(SvPVX(sv), SvLEN(sv), char);
1233 register CONTEXT *cx;
1234 I32 gimme = OP_GIMME(op, -1);
1237 if (cxstack_ix >= 0)
1238 gimme = cxstack[cxstack_ix].blk_gimme;
1246 PUSHBLOCK(cx, CXt_BLOCK, sp);
1257 U32 lval = op->op_flags & OPf_MOD;
1258 U32 defer = op->op_private & OPpLVAL_DEFER;
1260 if (SvTYPE(hv) != SVt_PVHV)
1262 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
1264 if (!he || HeVAL(he) == &sv_undef) {
1268 DIE(no_helem, SvPV(keysv, na));
1269 lv = sv_newmortal();
1270 sv_upgrade(lv, SVt_PVLV);
1272 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1273 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1274 LvTARG(lv) = SvREFCNT_inc(hv);
1279 if (op->op_private & OPpLVAL_INTRO) {
1280 if (HvNAME(hv) && isGV(HeVAL(he)))
1281 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1283 save_svref(&HeVAL(he));
1285 else if (op->op_private & OPpDEREF)
1286 vivify_ref(HeVAL(he), op->op_private & OPpDEREF);
1288 PUSHs(he ? HeVAL(he) : &sv_undef);
1295 register CONTEXT *cx;
1301 if (op->op_flags & OPf_SPECIAL) {
1302 cx = &cxstack[cxstack_ix];
1303 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1308 gimme = OP_GIMME(op, -1);
1310 if (cxstack_ix >= 0)
1311 gimme = cxstack[cxstack_ix].blk_gimme;
1316 if (gimme == G_VOID)
1318 else if (gimme == G_SCALAR) {
1321 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1324 *MARK = sv_mortalcopy(TOPs);
1331 else if (gimme == G_ARRAY) {
1332 for (mark = newsp + 1; mark <= SP; mark++)
1333 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1334 *mark = sv_mortalcopy(*mark);
1335 /* in case LEAVE wipes old return values */
1337 curpm = newpm; /* Don't pop $1 et al till now */
1347 register CONTEXT *cx;
1352 cx = &cxstack[cxstack_ix];
1353 if (cx->cx_type != CXt_LOOP)
1354 DIE("panic: pp_iter");
1356 av = cx->blk_loop.iterary;
1357 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
1360 SvREFCNT_dec(*cx->blk_loop.itervar);
1362 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1366 if (av != curstack && SvIMMORTAL(sv)) {
1367 SV *lv = cx->blk_loop.iterlval;
1368 if (lv && SvREFCNT(lv) > 1) {
1373 SvREFCNT_dec(LvTARG(lv));
1375 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
1376 sv_upgrade(lv, SVt_PVLV);
1378 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1380 LvTARG(lv) = SvREFCNT_inc(av);
1381 LvTARGOFF(lv) = cx->blk_loop.iterix;
1386 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
1394 ((PMOP*)p)->op_private &= ~OPpLVAL_INTRO;
1400 register PMOP *pm = cPMOP;
1416 register REGEXP *rx = pm->op_pmregexp;
1418 int force_on_match = 0;
1419 I32 oldsave = savestack_ix;
1421 /* known replacement string? */
1422 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
1423 if (op->op_flags & OPf_STACKED)
1429 if (SvREADONLY(TARG)
1430 || (SvTYPE(TARG) > SVt_PVLV
1431 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1433 s = SvPV(TARG, len);
1434 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
1438 if (pm->op_private & OPpLVAL_INTRO)
1439 croak("Recursive substitution detected");
1441 SAVEDESTRUCTOR(leave_subst, pm);
1442 pm->op_private |= OPpLVAL_INTRO;
1447 DIE("panic: do_subst");
1450 maxiters = (strend - s) + 10;
1452 if (!rx->prelen && curpm) {
1454 rx = pm->op_pmregexp;
1456 safebase = (!rx->nparens && !sawampersand);
1457 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1459 multiline = pm->op_pmflags & PMf_MULTILINE;
1462 if (pm->op_pmshort) {
1463 if (pm->op_pmflags & PMf_SCANFIRST) {
1464 if (SvSCREAM(TARG)) {
1465 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1467 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1470 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1473 if (s && rx->regback >= 0) {
1474 ++BmUSEFUL(pm->op_pmshort);
1482 else if (!multiline) {
1483 if (*SvPVX(pm->op_pmshort) != *s
1484 || (pm->op_pmslen > 1
1485 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1488 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1489 SvREFCNT_dec(pm->op_pmshort);
1490 pm->op_pmshort = Nullsv; /* opt is being useless */
1494 /* only replace once? */
1495 once = !(rpm->op_pmflags & PMf_GLOBAL);
1497 /* known replacement string? */
1498 c = dstr ? SvPV(dstr, clen) : Nullch;
1500 /* can do inplace substitution? */
1501 if (c && clen <= rx->minlen) {
1502 if (! pregexec(rx, s, strend, orig, 0,
1503 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1505 LEAVE_SCOPE(oldsave);
1508 if (force_on_match) {
1510 s = SvPV_force(TARG, len);
1513 if (rx->subbase) /* oops, no we can't */
1517 SvSCREAM_off(TARG); /* disable possible screamer */
1519 rxtainted = rx->exec_tainted;
1523 if (m - s > strend - d) { /* faster to shorten from end */
1525 Copy(c, m, clen, char);
1530 Move(d, m, i, char);
1534 SvCUR_set(TARG, m - s);
1537 else if (i = m - s) { /* faster from front */
1545 Copy(c, m, clen, char);
1550 Copy(c, d, clen, char);
1555 TAINT_IF(rxtainted);
1561 if (iters++ > maxiters)
1562 DIE("Substitution loop");
1563 rxtainted |= rx->exec_tainted;
1568 Move(s, d, i, char);
1572 Copy(c, d, clen, char);
1576 } while (pregexec(rx, s, strend, orig, s == m,
1577 Nullsv, TRUE)); /* don't match same null twice */
1580 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1581 Move(s, d, i+1, char); /* include the NUL */
1583 TAINT_IF(rxtainted);
1584 PUSHs(sv_2mortal(newSViv((I32)iters)));
1586 (void)SvPOK_only(TARG);
1589 LEAVE_SCOPE(oldsave);
1593 if (pregexec(rx, s, strend, orig, 0,
1594 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 */
1713 if (gimme == G_SCALAR) {
1716 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
1723 else if (gimme == G_ARRAY) {
1724 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1726 *MARK = sv_mortalcopy(*MARK);
1731 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1732 curpm = newpm; /* ... and pop $1 et al */
1735 return pop_return();
1744 register CONTEXT *cx;
1746 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
1749 DIE("Not a CODE reference");
1750 switch (SvTYPE(sv)) {
1755 if (sv == &sv_yes) /* unfound import, ignore */
1757 if (SvGMAGICAL(sv)) {
1759 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1764 DIE(no_usym, "a subroutine");
1765 if (op->op_private & HINT_STRICT_REFS)
1766 DIE(no_symref, sym, "a subroutine");
1767 cv = perl_get_cv(sym, TRUE);
1771 if (SvTYPE(cv) == SVt_PVCV)
1776 DIE("Not a CODE reference");
1781 if (!(cv = GvCVu((GV*)sv)))
1782 cv = sv_2cv(sv, &stash, &gv, TRUE);
1791 DIE("Not a CODE reference");
1793 if (!CvROOT(cv) && !CvXSUB(cv)) {
1797 /* anonymous or undef'd function leaves us no recourse */
1798 if (CvANON(cv) || !(gv = CvGV(cv)))
1799 DIE("Undefined subroutine called");
1800 /* autoloaded stub? */
1801 if (cv != GvCV(gv)) {
1805 /* should call AUTOLOAD now? */
1806 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1813 subname = sv_newmortal();
1814 gv_efullname3(subname, gv, Nullch);
1815 DIE("Undefined subroutine &%s called", SvPVX(subname));
1819 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
1824 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1825 || strEQ(GvNAME(gv), "END")
1826 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1827 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1828 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1829 /* GV is potentially non-unique, or contain different CV. */
1830 sv_setsv(sv, newRV((SV*)cv));
1833 gv_efullname3(sv, gv, Nullch);
1836 if (CvXSUB(cv)) curcopdb = curcop;
1838 DIE("No DBsub routine");
1842 if (CvOLDSTYLE(cv)) {
1843 I32 (*fp3)_((int,int,int));
1845 register I32 items = SP - MARK;
1846 /* We dont worry to copy from @_. */
1851 stack_sp = mark + 1;
1852 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1853 items = (*fp3)(CvXSUBANY(cv).any_i32,
1854 MARK - stack_base + 1,
1856 stack_sp = stack_base + items;
1859 I32 markix = TOPMARK;
1864 /* Need to copy @_ to stack. Alternative may be to
1865 * switch stack to @_, and copy return values
1866 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1867 AV* av = GvAV(defgv);
1868 I32 items = AvFILL(av) + 1;
1871 /* Mark is at the end of the stack. */
1873 Copy(AvARRAY(av), sp + 1, items, SV*);
1878 if (curcopdb) { /* We assume that the first
1879 XSUB in &DB::sub is the
1885 /* Do we need to open block here? XXXX */
1886 (void)(*CvXSUB(cv))(cv);
1888 /* Enforce some sanity in scalar context. */
1889 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1890 if (markix > stack_sp - stack_base)
1891 *(stack_base + markix) = &sv_undef;
1893 *(stack_base + markix) = *stack_sp;
1894 stack_sp = stack_base + markix;
1902 register I32 items = SP - MARK;
1903 AV* padlist = CvPADLIST(cv);
1904 SV** svp = AvARRAY(padlist);
1905 push_return(op->op_next);
1906 PUSHBLOCK(cx, CXt_SUB, MARK);
1909 if (CvDEPTH(cv) < 2)
1910 (void)SvREFCNT_inc(cv);
1911 else { /* save temporaries on recursion? */
1912 if (CvDEPTH(cv) == 100 && dowarn
1913 && !(perldb && cv == GvCV(DBsub)))
1914 sub_crush_depth(cv);
1915 if (CvDEPTH(cv) > AvFILL(padlist)) {
1917 AV *newpad = newAV();
1918 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1919 I32 ix = AvFILL((AV*)svp[1]);
1920 svp = AvARRAY(svp[0]);
1921 for ( ;ix > 0; ix--) {
1922 if (svp[ix] != &sv_undef) {
1923 char *name = SvPVX(svp[ix]);
1924 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1925 || *name == '&') /* anonymous code? */
1927 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1929 else { /* our own lexical */
1931 av_store(newpad, ix, sv = (SV*)newAV());
1932 else if (*name == '%')
1933 av_store(newpad, ix, sv = (SV*)newHV());
1935 av_store(newpad, ix, sv = NEWSV(0,0));
1940 av_store(newpad, ix, sv = NEWSV(0,0));
1944 av = newAV(); /* will be @_ */
1946 av_store(newpad, 0, (SV*)av);
1947 AvFLAGS(av) = AVf_REIFY;
1948 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1949 AvFILL(padlist) = CvDEPTH(cv);
1950 svp = AvARRAY(padlist);
1954 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1956 AV* av = (AV*)curpad[0];
1963 cx->blk_sub.savearray = GvAV(defgv);
1964 cx->blk_sub.argarray = av;
1965 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
1968 if (items > AvMAX(av) + 1) {
1970 if (AvARRAY(av) != ary) {
1971 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1972 SvPVX(av) = (char*)ary;
1974 if (items > AvMAX(av) + 1) {
1975 AvMAX(av) = items - 1;
1976 Renew(ary,items,SV*);
1978 SvPVX(av) = (char*)ary;
1981 Copy(MARK,AvARRAY(av),items,SV*);
1982 AvFILL(av) = items - 1;
1990 RETURNOP(CvSTART(cv));
1999 warn("Deep recursion on anonymous subroutine");
2001 SV* tmpstr = sv_newmortal();
2002 gv_efullname3(tmpstr, CvGV(cv), Nullch);
2003 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
2013 U32 lval = op->op_flags & OPf_MOD;
2014 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
2017 elem -= curcop->cop_arybase;
2018 if (SvTYPE(av) != SVt_PVAV)
2020 svp = av_fetch(av, elem, lval && !defer);
2022 if (!svp || *svp == &sv_undef) {
2025 DIE(no_aelem, elem);
2026 lv = sv_newmortal();
2027 sv_upgrade(lv, SVt_PVLV);
2029 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2030 LvTARG(lv) = SvREFCNT_inc(av);
2031 LvTARGOFF(lv) = elem;
2036 if (op->op_private & OPpLVAL_INTRO)
2038 else if (op->op_private & OPpDEREF)
2039 vivify_ref(*svp, op->op_private & OPpDEREF);
2041 PUSHs(svp ? *svp : &sv_undef);
2046 vivify_ref(sv, to_what)
2055 if (SvTYPE(sv) < SVt_RV)
2056 sv_upgrade(sv, SVt_RV);
2057 else if (SvTYPE(sv) >= SVt_PV) {
2058 (void)SvOOK_off(sv);
2059 Safefree(SvPVX(sv));
2060 SvLEN(sv) = SvCUR(sv) = 0;
2064 SvRV(sv) = newSV(0);
2067 SvRV(sv) = (SV*)newAV();
2070 SvRV(sv) = (SV*)newHV();
2087 sv = *(stack_base + TOPMARK + 1);
2100 !(packname = SvPV(sv, packlen)) ||
2101 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2102 !(ob=(SV*)GvIO(iogv)))
2104 char *name = SvPV(nm, na);
2106 if (!packname || !isALPHA(*packname))
2107 DIE("Can't call method \"%s\" without a package or object reference", name);
2108 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2109 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2110 stash = gv_stashpvn(packname, packlen, TRUE);
2112 DIE("Can't call method \"%s\" in empty package \"%s\"",
2115 gv = gv_fetchmethod(stash,name);
2117 DIE("Can't locate object method \"%s\" via package \"%s\"",
2119 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
2122 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2125 if (!ob || !SvOBJECT(ob)) {
2126 char *name = SvPV(nm, na);
2127 DIE("Can't call method \"%s\" on unblessed reference", name);
2130 if (!gv) { /* nothing cached */
2131 char *name = SvPV(nm, na);
2132 gv = gv_fetchmethod(SvSTASH(ob),name);
2134 DIE("Can't locate object method \"%s\" via package \"%s\"",
2135 name, HvNAME(SvSTASH(ob)));
2138 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);