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"))
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)) {
203 s = SvPV_force(TARG, len);
204 sv_setpv(TARG, ""); /* Suppress warning. */
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 (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
246 SvIVX(TOPs) != IV_MAX)
249 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
264 RETURNOP(cLOGOP->op_other);
270 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
273 SETn( left + right );
281 AV *av = GvAV((GV*)cSVOP->op_sv);
282 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
283 PUSHs(svp ? *svp : &sv_undef);
291 do_join(TARG, *MARK, MARK, SP);
304 /* Oversized hot code. */
308 dSP; dMARK; dORIGMARK;
314 if (op->op_flags & OPf_STACKED)
318 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
324 perl_call_method("PRINT", G_SCALAR);
332 if (!(io = GvIO(gv))) {
334 SV* sv = sv_newmortal();
335 gv_fullname3(sv, gv, Nullch);
336 warn("Filehandle %s never opened", SvPV(sv,na));
339 SETERRNO(EBADF,RMS$_IFI);
342 else if (!(fp = IoOFP(io))) {
344 SV* sv = sv_newmortal();
345 gv_fullname3(sv, gv, Nullch);
347 warn("Filehandle %s opened only for input", SvPV(sv,na));
349 warn("print on closed filehandle %s", SvPV(sv,na));
351 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
358 if (!do_print(*MARK, fp))
362 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
371 if (!do_print(*MARK, fp))
380 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
383 if (IoFLAGS(io) & IOf_FLUSH)
384 if (PerlIO_flush(fp) == EOF)
407 if (SvTYPE(av) != SVt_PVAV)
408 DIE("Not an ARRAY reference");
409 if (op->op_private & OPpLVAL_INTRO)
410 av = (AV*)save_svref((SV**)sv);
411 if (op->op_flags & OPf_REF) {
417 if (SvTYPE(sv) == SVt_PVAV) {
419 if (op->op_flags & OPf_REF) {
427 if (SvTYPE(sv) != SVt_PVGV) {
430 if (SvGMAGICAL(sv)) {
436 if (op->op_flags & OPf_REF ||
437 op->op_private & HINT_STRICT_REFS)
438 DIE(no_usym, "an ARRAY");
439 if (GIMME == G_ARRAY)
444 if (op->op_private & HINT_STRICT_REFS)
445 DIE(no_symref, sym, "an ARRAY");
446 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
451 if (op->op_private & OPpLVAL_INTRO)
453 if (op->op_flags & OPf_REF) {
460 if (GIMME == G_ARRAY) {
461 I32 maxarg = AvFILL(av) + 1;
463 Copy(AvARRAY(av), SP+1, maxarg, SV*);
468 I32 maxarg = AvFILL(av) + 1;
484 if (SvTYPE(hv) != SVt_PVHV)
485 DIE("Not a HASH reference");
486 if (op->op_private & OPpLVAL_INTRO)
487 hv = (HV*)save_svref((SV**)sv);
488 if (op->op_flags & OPf_REF) {
494 if (SvTYPE(sv) == SVt_PVHV) {
496 if (op->op_flags & OPf_REF) {
504 if (SvTYPE(sv) != SVt_PVGV) {
507 if (SvGMAGICAL(sv)) {
513 if (op->op_flags & OPf_REF ||
514 op->op_private & HINT_STRICT_REFS)
515 DIE(no_usym, "a HASH");
516 if (GIMME == G_ARRAY) {
523 if (op->op_private & HINT_STRICT_REFS)
524 DIE(no_symref, sym, "a HASH");
525 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
530 if (op->op_private & OPpLVAL_INTRO)
532 if (op->op_flags & OPf_REF) {
539 if (GIMME == G_ARRAY) { /* array wanted */
546 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
559 SV **lastlelem = stack_sp;
560 SV **lastrelem = stack_base + POPMARK;
561 SV **firstrelem = stack_base + POPMARK + 1;
562 SV **firstlelem = lastrelem + 1;
574 delaymagic = DM_DELAY; /* catch simultaneous items */
576 /* If there's a common identifier on both sides we have to take
577 * special care that assigning the identifier on the left doesn't
578 * clobber a value on the right that's used later in the list.
580 if (op->op_private & OPpASSIGN_COMMON) {
581 for (relem = firstrelem; relem <= lastrelem; relem++) {
584 *relem = sv_mortalcopy(sv);
592 while (lelem <= lastlelem) {
593 TAINT_NOT; /* Each item stands on its own, taintwise. */
595 switch (SvTYPE(sv)) {
598 magic = SvMAGICAL(ary) != 0;
602 while (relem <= lastrelem) { /* gobble up all the rest */
607 (void)av_store(ary,i++,sv);
617 magic = SvMAGICAL(hash) != 0;
620 while (relem < lastrelem) { /* gobble up all the rest */
625 sv = &sv_no, relem++;
626 tmpstr = NEWSV(29,0);
628 sv_setsv(tmpstr,*relem); /* value */
630 (void)hv_store_ent(hash,sv,tmpstr,0);
635 if (relem == lastrelem)
636 warn("Odd number of elements in hash list");
640 if (SvTHINKFIRST(sv)) {
641 if (SvREADONLY(sv) && curcop != &compiling) {
642 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
644 if (relem <= lastrelem)
651 if (relem <= lastrelem) {
652 sv_setsv(sv, *relem);
656 sv_setsv(sv, &sv_undef);
661 if (delaymagic & ~DM_DELAY) {
662 if (delaymagic & DM_UID) {
664 (void)setresuid(uid,euid,(Uid_t)-1);
667 (void)setreuid(uid,euid);
670 if ((delaymagic & DM_UID) == DM_RUID) {
672 delaymagic &= ~DM_RUID;
674 # endif /* HAS_SETRUID */
676 if ((delaymagic & DM_UID) == DM_EUID) {
678 delaymagic &= ~DM_EUID;
680 # endif /* HAS_SETEUID */
681 if (delaymagic & DM_UID) {
683 DIE("No setreuid available");
686 # endif /* HAS_SETREUID */
687 #endif /* HAS_SETRESUID */
689 euid = (int)geteuid();
691 if (delaymagic & DM_GID) {
693 (void)setresgid(gid,egid,(Gid_t)-1);
696 (void)setregid(gid,egid);
699 if ((delaymagic & DM_GID) == DM_RGID) {
701 delaymagic &= ~DM_RGID;
703 # endif /* HAS_SETRGID */
705 if ((delaymagic & DM_GID) == DM_EGID) {
707 delaymagic &= ~DM_EGID;
709 # endif /* HAS_SETEGID */
710 if (delaymagic & DM_GID) {
712 DIE("No setregid available");
715 # endif /* HAS_SETREGID */
716 #endif /* HAS_SETRESGID */
718 egid = (int)getegid();
720 tainting |= (uid && (euid != uid || egid != gid));
723 if (GIMME == G_ARRAY) {
727 SP = firstrelem + (lastlelem - firstlelem);
729 *relem++ = &sv_undef;
736 SETi(lastrelem - firstrelem + 1);
744 register PMOP *pm = cPMOP;
751 register REGEXP *rx = pm->op_pmregexp;
755 I32 oldsave = savestack_ix;
757 if (op->op_flags & OPf_STACKED)
766 DIE("panic: do_match");
768 if (pm->op_pmflags & PMf_USED) {
769 if (gimme == G_ARRAY)
774 if (!rx->prelen && curpm) {
776 rx = pm->op_pmregexp;
779 if (global = pm->op_pmflags & PMf_GLOBAL) {
781 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
782 MAGIC* mg = mg_find(TARG, 'g');
783 if (mg && mg->mg_len >= 0) {
784 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
785 minmatch = (mg->mg_flags & MGf_MINMATCH);
789 if (!rx->nparens && !global)
790 gimme = G_SCALAR; /* accidental array context? */
791 safebase = (((gimme == G_ARRAY) || global) && !sawampersand);
792 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
794 multiline = pm->op_pmflags & PMf_MULTILINE;
798 if (global && rx->startp[0]) {
802 minmatch = (s == rx->startp[0]);
804 if (pm->op_pmshort) {
805 if (pm->op_pmflags & PMf_SCANFIRST) {
806 if (SvSCREAM(TARG)) {
807 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
809 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
811 else if (pm->op_pmflags & PMf_ALL)
814 else if (!(s = fbm_instr((unsigned char*)s,
815 (unsigned char*)strend, pm->op_pmshort)))
817 else if (pm->op_pmflags & PMf_ALL)
819 if (s && rx->regback >= 0) {
820 ++BmUSEFUL(pm->op_pmshort);
828 else if (!multiline) {
829 if (*SvPVX(pm->op_pmshort) != *s
830 || (pm->op_pmslen > 1
831 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
834 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
835 SvREFCNT_dec(pm->op_pmshort);
836 pm->op_pmshort = Nullsv; /* opt is being useless */
839 if (pregexec(rx, s, strend, truebase, minmatch,
840 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
843 if (pm->op_pmflags & PMf_ONCE)
844 pm->op_pmflags |= PMf_USED;
852 if (gimme == G_ARRAY) {
855 TAINT_IF(rx->exec_tainted);
857 if (global && !iters)
861 EXTEND(SP, iters + i);
862 EXTEND_MORTAL(iters + i);
863 for (i = !i; i <= iters; i++) {
864 PUSHs(sv_newmortal());
866 if ((s = rx->startp[i]) && rx->endp[i] ) {
867 len = rx->endp[i] - s;
868 sv_setpvn(*SP, s, len);
872 truebase = rx->subbeg;
874 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
878 LEAVE_SCOPE(oldsave);
884 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
885 mg = mg_find(TARG, 'g');
887 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
888 mg = mg_find(TARG, 'g');
891 mg->mg_len = rx->endp[0] - rx->subbeg;
892 if (rx->startp[0] == rx->endp[0])
893 mg->mg_flags |= MGf_MINMATCH;
895 mg->mg_flags &= ~MGf_MINMATCH;
900 LEAVE_SCOPE(oldsave);
905 ++BmUSEFUL(pm->op_pmshort);
907 if (pm->op_pmflags & PMf_ONCE)
908 pm->op_pmflags |= PMf_USED;
909 Safefree(rx->subbase);
910 rx->subbase = Nullch;
912 rx->subbeg = truebase;
915 rx->endp[0] = s + SvCUR(pm->op_pmshort);
921 tmps = rx->subbase = savepvn(t, strend-t);
923 rx->subend = tmps + (strend-t);
924 tmps = rx->startp[0] = tmps + (s - t);
925 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
927 LEAVE_SCOPE(oldsave);
932 ++BmUSEFUL(pm->op_pmshort);
936 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
937 MAGIC* mg = mg_find(TARG, 'g');
942 LEAVE_SCOPE(oldsave);
943 if (gimme == G_ARRAY)
956 register IO *io = GvIO(last_in_gv);
957 register I32 type = op->op_type;
960 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
965 perl_call_method("READLINE", GIMME);
968 if (GIMME == G_SCALAR) sv_setsv(TARG, TOPs);
975 if (IoFLAGS(io) & IOf_ARGV) {
976 if (IoFLAGS(io) & IOf_START) {
977 IoFLAGS(io) &= ~IOf_START;
979 if (av_len(GvAVn(last_in_gv)) < 0) {
980 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
981 av_push(GvAVn(last_in_gv), tmpstr);
984 fp = nextargv(last_in_gv);
985 if (!fp) { /* Note: fp != IoIFP(io) */
986 (void)do_close(last_in_gv, FALSE); /* now it does*/
987 IoFLAGS(io) |= IOf_START;
990 else if (type == OP_GLOB) {
991 SV *tmpcmd = NEWSV(55, 0);
995 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
996 /* since spawning off a process is a real performance hit */
999 #include <lib$routines.h>
1002 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1003 char vmsspec[NAM$C_MAXRSS+1];
1004 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1005 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1006 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
1009 struct dsc$descriptor_s wilddsc
1010 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1011 struct dsc$descriptor_vs rsdsc
1012 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1013 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1015 /* We could find out if there's an explicit dev/dir or version
1016 by peeking into lib$find_file's internal context at
1017 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1018 but that's unsupported, so I don't want to do it now and
1019 have it bite someone in the future. */
1020 strcat(tmpfnam,tmpnam(NULL));
1021 cp = SvPV(tmpglob,i);
1023 if (cp[i] == ';') hasver = 1;
1025 if (sts) hasver = 1;
1029 hasdir = isunix = 1;
1032 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1037 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
1038 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1039 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1040 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1041 &dfltdsc,NULL,NULL,NULL))&1)) {
1042 end = rstr + (unsigned long int) *rslt;
1043 if (!hasver) while (*end != ';') end--;
1044 *(end++) = '\n'; *end = '\0';
1045 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1047 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1052 while (*(--begin) != ']' && *begin != '>') ;
1055 ok = (PerlIO_puts(tmpfp,begin) != EOF);
1057 if (cxt) (void)lib$find_file_end(&cxt);
1058 if (ok && sts != RMS$_NMF &&
1059 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1062 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1064 PerlIO_close(tmpfp);
1068 PerlIO_rewind(tmpfp);
1070 IoIFP(io) = fp = tmpfp;
1077 sv_setpv(tmpcmd, "for a in ");
1078 sv_catsv(tmpcmd, tmpglob);
1079 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1081 sv_setpv(tmpcmd, "perlglob ");
1082 sv_catsv(tmpcmd, tmpglob);
1083 sv_catpv(tmpcmd, " |");
1087 sv_setpvn(tmpcmd, cshname, cshlen);
1088 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1089 sv_catsv(tmpcmd, tmpglob);
1090 sv_catpv(tmpcmd, "' 2>/dev/null |");
1092 sv_setpv(tmpcmd, "echo ");
1093 sv_catsv(tmpcmd, tmpglob);
1095 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1097 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1100 #endif /* !DOSISH */
1101 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1102 FALSE, 0, 0, Nullfp);
1108 else if (type == OP_GLOB)
1112 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1113 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1114 if (GIMME == G_SCALAR) {
1115 (void)SvOK_off(TARG);
1120 if (GIMME == G_ARRAY) {
1121 sv = sv_2mortal(NEWSV(57, 80));
1126 (void)SvUPGRADE(sv, SVt_PV);
1127 tmplen = SvLEN(sv); /* remember if already alloced */
1129 Sv_Grow(sv, 80); /* try short-buffering it */
1130 if (type == OP_RCATLINE)
1136 if (!sv_gets(sv, fp, offset)) {
1137 PerlIO_clearerr(fp);
1138 if (IoFLAGS(io) & IOf_ARGV) {
1139 fp = nextargv(last_in_gv);
1142 (void)do_close(last_in_gv, FALSE);
1143 IoFLAGS(io) |= IOf_START;
1145 else if (type == OP_GLOB) {
1146 (void)do_close(last_in_gv, FALSE);
1148 if (GIMME == G_SCALAR) {
1149 (void)SvOK_off(TARG);
1154 /* This should not be marked tainted if the fp is marked clean */
1155 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1161 if (type == OP_GLOB) {
1164 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1165 tmps = SvEND(sv) - 1;
1166 if (*tmps == *SvPVX(rs)) {
1171 for (tmps = SvPVX(sv); *tmps; tmps++)
1172 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1173 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1175 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1176 (void)POPs; /* Unmatched wildcard? Chuck it... */
1180 if (GIMME == G_ARRAY) {
1181 if (SvLEN(sv) - SvCUR(sv) > 20) {
1182 SvLEN_set(sv, SvCUR(sv)+1);
1183 Renew(SvPVX(sv), SvLEN(sv), char);
1185 sv = sv_2mortal(NEWSV(58, 80));
1188 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1189 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1193 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1194 Renew(SvPVX(sv), SvLEN(sv), char);
1203 register CONTEXT *cx;
1207 * We don't just use the GIMME macro here because it assumes there's
1208 * already a context, which ain't necessarily so at initial startup.
1211 if (op->op_flags & OPf_KNOW)
1212 gimme = op->op_flags & OPf_LIST;
1213 else if (cxstack_ix >= 0)
1214 gimme = cxstack[cxstack_ix].blk_gimme;
1221 PUSHBLOCK(cx, CXt_BLOCK, sp);
1232 I32 lval = op->op_flags & OPf_MOD;
1234 if (SvTYPE(hv) != SVt_PVHV)
1236 he = hv_fetch_ent(hv, keysv, lval, 0);
1238 if (!he || HeVAL(he) == &sv_undef)
1239 DIE(no_helem, SvPV(keysv, na));
1240 if (op->op_private & OPpLVAL_INTRO) {
1241 if (HvNAME(hv) && isGV(HeVAL(he)))
1242 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1244 save_svref(&HeVAL(he));
1246 else if (op->op_private & OPpDEREF)
1247 provide_ref(op, HeVAL(he));
1249 PUSHs(he ? HeVAL(he) : &sv_undef);
1256 register CONTEXT *cx;
1262 if (op->op_flags & OPf_SPECIAL) {
1263 cx = &cxstack[cxstack_ix];
1264 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1269 if (op->op_flags & OPf_KNOW)
1270 gimme = op->op_flags & OPf_LIST;
1271 else if (cxstack_ix >= 0)
1272 gimme = cxstack[cxstack_ix].blk_gimme;
1276 if (gimme == G_SCALAR) {
1277 if (op->op_private & OPpLEAVE_VOID)
1282 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1285 *MARK = sv_mortalcopy(TOPs);
1294 for (mark = newsp + 1; mark <= SP; mark++)
1295 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1296 *mark = sv_mortalcopy(*mark);
1297 /* in case LEAVE wipes old return values */
1299 curpm = newpm; /* Don't pop $1 et al till now */
1309 register CONTEXT *cx;
1314 cx = &cxstack[cxstack_ix];
1315 if (cx->cx_type != CXt_LOOP)
1316 DIE("panic: pp_iter");
1317 av = cx->blk_loop.iterary;
1318 if (av == curstack && cx->blk_loop.iterix >= cx->blk_oldsp)
1321 if (cx->blk_loop.iterix >= AvFILL(av))
1324 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
1328 if (av != curstack && SvIMMORTAL(sv)) {
1329 SV *lv = cx->blk_loop.iterlval;
1331 SvREFCNT_dec(LvTARG(lv));
1333 lv = cx->blk_loop.iterlval = newSVsv(sv);
1334 sv_upgrade(lv, SVt_PVLV);
1335 sv_magic(lv, Nullsv, 'y', Nullch, 0);
1338 LvTARG(lv) = SvREFCNT_inc(av);
1339 LvTARGOFF(lv) = cx->blk_loop.iterix;
1343 *cx->blk_loop.itervar = sv;
1350 register PMOP *pm = cPMOP;
1365 register REGEXP *rx = pm->op_pmregexp;
1367 int force_on_match = 0;
1368 I32 oldsave = savestack_ix;
1370 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1372 if (op->op_flags & OPf_STACKED)
1378 s = SvPV(TARG, len);
1379 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1384 DIE("panic: do_subst");
1387 maxiters = (strend - s) + 10;
1389 if (!rx->prelen && curpm) {
1391 rx = pm->op_pmregexp;
1393 safebase = (!rx->nparens && !sawampersand);
1394 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1396 multiline = pm->op_pmflags & PMf_MULTILINE;
1399 if (pm->op_pmshort) {
1400 if (pm->op_pmflags & PMf_SCANFIRST) {
1401 if (SvSCREAM(TARG)) {
1402 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1404 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1407 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1410 if (s && rx->regback >= 0) {
1411 ++BmUSEFUL(pm->op_pmshort);
1419 else if (!multiline) {
1420 if (*SvPVX(pm->op_pmshort) != *s
1421 || (pm->op_pmslen > 1
1422 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
1425 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1426 SvREFCNT_dec(pm->op_pmshort);
1427 pm->op_pmshort = Nullsv; /* opt is being useless */
1430 once = !(rpm->op_pmflags & PMf_GLOBAL);
1431 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1432 c = SvPV(dstr, clen);
1433 if (clen <= rx->minlen) {
1434 /* can do inplace substitution */
1435 if (pregexec(rx, s, strend, orig, 0,
1436 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1437 if (force_on_match) {
1439 s = SvPV_force(TARG, len);
1442 if (rx->subbase) /* oops, no we can't */
1446 SvSCREAM_off(TARG); /* disable possible screamer */
1451 if (m - s > strend - d) { /* faster to shorten from end */
1453 Copy(c, m, clen, char);
1458 Move(d, m, i, char);
1462 SvCUR_set(TARG, m - s);
1463 (void)SvPOK_only(TARG);
1466 LEAVE_SCOPE(oldsave);
1470 else if (i = m - s) { /* faster from front */
1478 Copy(c, m, clen, char);
1479 (void)SvPOK_only(TARG);
1482 LEAVE_SCOPE(oldsave);
1488 Copy(c, d, clen, char);
1489 (void)SvPOK_only(TARG);
1492 LEAVE_SCOPE(oldsave);
1497 (void)SvPOK_only(TARG);
1500 LEAVE_SCOPE(oldsave);
1506 if (iters++ > maxiters)
1507 DIE("Substitution loop");
1512 Move(s, d, i, char);
1516 Copy(c, d, clen, char);
1520 } while (pregexec(rx, s, strend, orig, s == m,
1521 Nullsv, TRUE)); /* (don't match same null twice) */
1524 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1525 Move(s, d, i+1, char); /* include the Null */
1527 (void)SvPOK_only(TARG);
1529 PUSHs(sv_2mortal(newSViv((I32)iters)));
1530 LEAVE_SCOPE(oldsave);
1534 LEAVE_SCOPE(oldsave);
1540 if (pregexec(rx, s, strend, orig, 0,
1541 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1543 if (force_on_match) {
1545 s = SvPV_force(TARG, len);
1548 dstr = NEWSV(25, sv_len(TARG));
1549 sv_setpvn(dstr, m, s-m);
1552 register CONTEXT *cx;
1554 RETURNOP(cPMOP->op_pmreplroot);
1557 if (iters++ > maxiters)
1558 DIE("Substitution loop");
1559 if (rx->subbase && rx->subbase != orig) {
1564 strend = s + (strend - m);
1567 sv_catpvn(dstr, s, m-s);
1570 sv_catpvn(dstr, c, clen);
1573 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
1574 sv_catpvn(dstr, s, strend - s);
1576 (void)SvOOK_off(TARG);
1577 Safefree(SvPVX(TARG));
1578 SvPVX(TARG) = SvPVX(dstr);
1579 SvCUR_set(TARG, SvCUR(dstr));
1580 SvLEN_set(TARG, SvLEN(dstr));
1584 (void)SvPOK_only(TARG);
1586 PUSHs(sv_2mortal(newSViv((I32)iters)));
1587 LEAVE_SCOPE(oldsave);
1591 LEAVE_SCOPE(oldsave);
1595 ++BmUSEFUL(pm->op_pmshort);
1597 LEAVE_SCOPE(oldsave);
1606 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1608 LEAVE; /* exit inner scope */
1611 if (stack_base + *markstack_ptr > sp) {
1614 LEAVE; /* exit outer scope */
1615 (void)POPMARK; /* pop src */
1616 items = --*markstack_ptr - markstack_ptr[-1];
1617 (void)POPMARK; /* pop dst */
1618 SP = stack_base + POPMARK; /* pop original mark */
1619 if (GIMME != G_ARRAY) {
1630 ENTER; /* enter inner scope */
1633 src = stack_base[*markstack_ptr];
1637 RETURNOP(cLOGOP->op_other);
1648 register CONTEXT *cx;
1653 if (gimme == G_SCALAR) {
1656 if (SvFLAGS(TOPs) & SVs_TEMP)
1659 *MARK = sv_mortalcopy(TOPs);
1667 for (mark = newsp + 1; mark <= SP; mark++)
1668 if (!(SvFLAGS(*mark) & SVs_TEMP))
1669 *mark = sv_mortalcopy(*mark);
1670 /* in case LEAVE wipes old return values */
1673 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1674 AV* av = cx->blk_sub.argarray;
1679 curpm = newpm; /* Don't pop $1 et al till now */
1683 return pop_return();
1692 register CONTEXT *cx;
1694 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1697 DIE("Not a CODE reference");
1698 switch (SvTYPE(sv)) {
1703 if (sv == &sv_yes) /* unfound import, ignore */
1706 DIE(no_usym, "a subroutine");
1708 if (op->op_private & HINT_STRICT_REFS)
1709 DIE(no_symref, sym, "a subroutine");
1710 cv = perl_get_cv(sym, TRUE);
1714 if (SvTYPE(cv) == SVt_PVCV)
1719 DIE("Not a CODE reference");
1724 if (!(cv = GvCV((GV*)sv)))
1725 cv = sv_2cv(sv, &stash, &gv, TRUE);
1734 DIE("Not a CODE reference");
1736 if (!CvROOT(cv) && !CvXSUB(cv)) {
1737 if (gv = CvGV(cv)) {
1740 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1742 if (SvTYPE(sv) == SVt_PVGV) {
1743 SvREFCNT_dec(GvCV((GV*)sv));
1744 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1748 tmpstr = sv_newmortal();
1749 gv_efullname3(tmpstr, gv, Nullch);
1750 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1751 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1753 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1754 SvTAINTED_off(GvSV(CvGV(cv)));
1758 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1760 DIE("Undefined subroutine called");
1764 if ((op->op_private & OPpENTERSUB_DB)) {
1768 if ( CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)
1769 || strEQ(GvNAME(gv), "END") ) {
1770 /* GV is potentially non-unique */
1771 sv_setsv(sv, newRV((SV*)cv));
1774 gv_efullname3(sv, gv, Nullch);
1777 if (CvXSUB(cv)) curcopdb = curcop;
1779 DIE("No DBsub routine");
1783 if (CvOLDSTYLE(cv)) {
1784 I32 (*fp3)_((int,int,int));
1786 register I32 items = SP - MARK;
1787 /* We dont worry to copy from @_. */
1792 stack_sp = mark + 1;
1793 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1794 items = (*fp3)(CvXSUBANY(cv).any_i32,
1795 MARK - stack_base + 1,
1797 stack_sp = stack_base + items;
1800 I32 markix = TOPMARK;
1805 /* Need to copy @_ to stack. Alternative may be to
1806 * switch stack to @_, and copy return values
1807 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1808 AV* av = GvAV(defgv);
1809 I32 items = AvFILL(av) + 1;
1812 /* Mark is at the end of the stack. */
1814 Copy(AvARRAY(av), sp + 1, items, SV*);
1819 if (curcopdb) { /* We assume that the first
1820 XSUB in &DB::sub is the
1826 /* Do we need to open block here? XXXX */
1827 (void)(*CvXSUB(cv))(cv);
1829 /* Enforce some sanity in scalar context. */
1830 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1831 if (markix > stack_sp - stack_base)
1832 *(stack_base + markix) = &sv_undef;
1834 *(stack_base + markix) = *stack_sp;
1835 stack_sp = stack_base + markix;
1843 register I32 items = SP - MARK;
1844 AV* padlist = CvPADLIST(cv);
1845 SV** svp = AvARRAY(padlist);
1846 push_return(op->op_next);
1847 PUSHBLOCK(cx, CXt_SUB, MARK);
1850 if (CvDEPTH(cv) < 2)
1851 (void)SvREFCNT_inc(cv);
1852 else { /* save temporaries on recursion? */
1853 if (CvDEPTH(cv) == 100 && dowarn
1854 && !(perldb && cv == GvCV(DBsub)))
1855 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1856 if (CvDEPTH(cv) > AvFILL(padlist)) {
1858 AV *newpad = newAV();
1859 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1860 I32 ix = AvFILL((AV*)svp[1]);
1861 svp = AvARRAY(svp[0]);
1862 for ( ;ix > 0; ix--) {
1863 if (svp[ix] != &sv_undef) {
1864 char *name = SvPVX(svp[ix]);
1865 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1866 || *name == '&') /* anonymous code? */
1868 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
1870 else { /* our own lexical */
1872 av_store(newpad, ix, sv = (SV*)newAV());
1873 else if (*name == '%')
1874 av_store(newpad, ix, sv = (SV*)newHV());
1876 av_store(newpad, ix, sv = NEWSV(0,0));
1881 av_store(newpad, ix, sv = NEWSV(0,0));
1885 av = newAV(); /* will be @_ */
1887 av_store(newpad, 0, (SV*)av);
1888 AvFLAGS(av) = AVf_REIFY;
1889 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1890 AvFILL(padlist) = CvDEPTH(cv);
1891 svp = AvARRAY(padlist);
1895 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1897 AV* av = (AV*)curpad[0];
1904 cx->blk_sub.savearray = GvAV(defgv);
1905 cx->blk_sub.argarray = av;
1906 GvAV(defgv) = cx->blk_sub.argarray;
1909 if (items > AvMAX(av) + 1) {
1911 if (AvARRAY(av) != ary) {
1912 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1913 SvPVX(av) = (char*)ary;
1915 if (items > AvMAX(av) + 1) {
1916 AvMAX(av) = items - 1;
1917 Renew(ary,items,SV*);
1919 SvPVX(av) = (char*)ary;
1922 Copy(MARK,AvARRAY(av),items,SV*);
1923 AvFILL(av) = items - 1;
1931 RETURNOP(CvSTART(cv));
1941 I32 lval = op->op_flags & OPf_MOD;
1944 elem -= curcop->cop_arybase;
1945 if (SvTYPE(av) != SVt_PVAV)
1947 svp = av_fetch(av, elem, lval);
1949 if (!svp || *svp == &sv_undef)
1950 DIE(no_aelem, elem);
1951 if (op->op_private & OPpLVAL_INTRO)
1953 else if (op->op_private & OPpDEREF)
1954 provide_ref(op, *svp);
1956 PUSHs(svp ? *svp : &sv_undef);
1970 if (SvTYPE(sv) < SVt_RV)
1971 sv_upgrade(sv, SVt_RV);
1972 else if (SvTYPE(sv) >= SVt_PV) {
1973 (void)SvOOK_off(sv);
1974 Safefree(SvPVX(sv));
1975 SvLEN(sv) = SvCUR(sv) = 0;
1977 switch (op->op_private & OPpDEREF)
1980 SvRV(sv) = newSV(0);
1983 SvRV(sv) = (SV*)newAV();
1986 SvRV(sv) = (SV*)newHV();
2003 sv = *(stack_base + TOPMARK + 1);
2016 !(packname = SvPV(sv, packlen)) ||
2017 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2018 !(ob=(SV*)GvIO(iogv)))
2020 char *name = SvPV(nm, na);
2022 if (!packname || !isALPHA(*packname))
2023 DIE("Can't call method \"%s\" without a package or object reference", name);
2024 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2025 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2026 stash = gv_stashpvn(packname, packlen, TRUE);
2028 DIE("Can't call method \"%s\" in empty package \"%s\"",
2031 gv = gv_fetchmethod(stash,name);
2033 DIE("Can't locate object method \"%s\" via package \"%s\"",
2038 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
2041 if (!ob || !SvOBJECT(ob)) {
2042 char *name = SvPV(nm, na);
2043 DIE("Can't call method \"%s\" on unblessed reference", name);
2046 if (!gv) { /* nothing cached */
2047 char *name = SvPV(nm, na);
2048 gv = gv_fetchmethod(SvSTASH(ob),name);
2050 DIE("Can't locate object method \"%s\" via package \"%s\"",
2051 name, HvNAME(SvSTASH(ob)));