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);
86 RETURNOP(cLOGOP->op_other);
95 if (op->op_private & OPpASSIGN_BACKWARDS) {
97 temp = left; left = right; right = temp;
99 if (tainting && tainted && (!SvGMAGICAL(left) || !SvSMAGICAL(left) ||
100 !((mg = mg_find(left, 't')) && mg->mg_len & 1)))
104 SvSetSV(right, left);
114 RETURNOP(cCONDOP->op_true);
116 RETURNOP(cCONDOP->op_false);
122 TAINT_NOT; /* Each statement is presumed innocent */
123 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
125 oldsave = scopestack[scopestack_ix - 1];
126 LEAVE_SCOPE(oldsave);
132 dSP; tryAMAGICbinSET(seq,0);
135 SETs( sv_eq(left, right) ? &sv_yes : &sv_no );
142 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
149 sv_setpvn(TARG,s,len);
151 else if (!SvOK(TARG))
152 sv_setpv(TARG, ""); /* Suppress warning. */
154 sv_catpvn(TARG,s,len);
164 if (op->op_private & OPpLVAL_INTRO)
165 SAVECLEARSV(curpad[op->op_targ]);
171 last_in_gv = (GV*)(*stack_sp--);
172 return do_readline();
177 dSP; tryAMAGICbinSET(eq,0);
180 SETs((TOPn == value) ? &sv_yes : &sv_no);
190 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
205 RETURNOP(cLOGOP->op_other);
211 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
214 SETn( left + right );
222 AV *av = GvAV((GV*)cSVOP->op_sv);
223 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
224 PUSHs(svp ? *svp : &sv_undef);
232 do_join(TARG, *MARK, MARK, SP);
245 /* Oversized hot code. */
249 dSP; dMARK; dORIGMARK;
254 if (op->op_flags & OPf_STACKED)
258 if (!(io = GvIO(gv))) {
260 SV* sv = sv_newmortal();
262 warn("Filehandle %s never opened", SvPV(sv,na));
265 SETERRNO(EBADF,RMS$_IFI);
268 else if (!(fp = IoOFP(io))) {
270 SV* sv = sv_newmortal();
273 warn("Filehandle %s opened only for input", SvPV(sv,na));
275 warn("print on closed filehandle %s", SvPV(sv,na));
277 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
284 if (!do_print(*MARK, fp))
288 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
297 if (!do_print(*MARK, fp))
306 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
309 if (IoFLAGS(io) & IOf_FLUSH)
310 if (fflush(fp) == EOF)
333 if (SvTYPE(av) != SVt_PVAV)
334 DIE("Not an ARRAY reference");
335 if (op->op_private & OPpLVAL_INTRO)
336 av = (AV*)save_svref((SV**)sv);
337 if (op->op_flags & OPf_REF) {
343 if (SvTYPE(sv) == SVt_PVAV) {
345 if (op->op_flags & OPf_REF) {
351 if (SvTYPE(sv) != SVt_PVGV) {
354 if (SvGMAGICAL(sv)) {
360 if (op->op_flags & OPf_REF ||
361 op->op_private & HINT_STRICT_REFS)
362 DIE(no_usym, "an ARRAY");
366 if (op->op_private & HINT_STRICT_REFS)
367 DIE(no_symref, sym, "an ARRAY");
368 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
371 if (op->op_private & OPpLVAL_INTRO)
373 if (op->op_flags & OPf_REF) {
380 if (GIMME == G_ARRAY) {
381 I32 maxarg = AvFILL(av) + 1;
383 Copy(AvARRAY(av), SP+1, maxarg, SV*);
388 I32 maxarg = AvFILL(av) + 1;
404 if (SvTYPE(hv) != SVt_PVHV)
405 DIE("Not a HASH reference");
406 if (op->op_private & OPpLVAL_INTRO)
407 hv = (HV*)save_svref((SV**)sv);
408 if (op->op_flags & OPf_REF) {
414 if (SvTYPE(sv) == SVt_PVHV) {
416 if (op->op_flags & OPf_REF) {
422 if (SvTYPE(sv) != SVt_PVGV) {
425 if (SvGMAGICAL(sv)) {
431 if (op->op_flags & OPf_REF ||
432 op->op_private & HINT_STRICT_REFS)
433 DIE(no_usym, "a HASH");
437 if (op->op_private & HINT_STRICT_REFS)
438 DIE(no_symref, sym, "a HASH");
439 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
442 if (op->op_private & OPpLVAL_INTRO)
444 if (op->op_flags & OPf_REF) {
451 if (GIMME == G_ARRAY) { /* array wanted */
458 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
471 SV **lastlelem = stack_sp;
472 SV **lastrelem = stack_base + POPMARK;
473 SV **firstrelem = stack_base + POPMARK + 1;
474 SV **firstlelem = lastrelem + 1;
486 delaymagic = DM_DELAY; /* catch simultaneous items */
488 /* If there's a common identifier on both sides we have to take
489 * special care that assigning the identifier on the left doesn't
490 * clobber a value on the right that's used later in the list.
492 if (op->op_private & OPpASSIGN_COMMON) {
493 for (relem = firstrelem; relem <= lastrelem; relem++) {
496 *relem = sv_mortalcopy(sv);
504 while (lelem <= lastlelem) {
506 switch (SvTYPE(sv)) {
509 magic = SvMAGICAL(ary) != 0;
513 while (relem <= lastrelem) { /* gobble up all the rest */
518 (void)av_store(ary,i++,sv);
528 magic = SvMAGICAL(hash) != 0;
531 while (relem < lastrelem) { /* gobble up all the rest */
536 sv = &sv_no, relem++;
537 tmps = SvPV(sv, len);
538 tmpstr = NEWSV(29,0);
540 sv_setsv(tmpstr,*relem); /* value */
542 (void)hv_store(hash,tmps,len,tmpstr,0);
549 if (SvTHINKFIRST(sv)) {
550 if (SvREADONLY(sv) && curcop != &compiling) {
551 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
553 if (relem <= lastrelem)
560 if (relem <= lastrelem) {
561 sv_setsv(sv, *relem);
565 sv_setsv(sv, &sv_undef);
570 if (delaymagic & ~DM_DELAY) {
571 if (delaymagic & DM_UID) {
573 (void)setresuid(uid,euid,(Uid_t)-1);
576 (void)setreuid(uid,euid);
579 if ((delaymagic & DM_UID) == DM_RUID) {
581 delaymagic &= ~DM_RUID;
583 # endif /* HAS_SETRUID */
585 if ((delaymagic & DM_UID) == DM_EUID) {
587 delaymagic &= ~DM_EUID;
589 # endif /* HAS_SETEUID */
590 if (delaymagic & DM_UID) {
592 DIE("No setreuid available");
595 # endif /* HAS_SETREUID */
596 #endif /* HAS_SETRESUID */
598 euid = (int)geteuid();
600 if (delaymagic & DM_GID) {
602 (void)setresgid(gid,egid,(Gid_t)-1);
605 (void)setregid(gid,egid);
608 if ((delaymagic & DM_GID) == DM_RGID) {
610 delaymagic &= ~DM_RGID;
612 # endif /* HAS_SETRGID */
614 if ((delaymagic & DM_GID) == DM_EGID) {
616 delaymagic &= ~DM_EGID;
618 # endif /* HAS_SETEGID */
619 if (delaymagic & DM_GID) {
621 DIE("No setregid available");
624 # endif /* HAS_SETREGID */
625 #endif /* HAS_SETRESGID */
627 egid = (int)getegid();
629 tainting |= (euid != uid || egid != gid);
632 if (GIMME == G_ARRAY) {
636 SP = firstrelem + (lastlelem - firstlelem);
641 for (relem = firstrelem; relem <= lastrelem; ++relem) {
645 SETi(lastrelem - firstrelem + 1);
656 register PMOP *pm = cPMOP;
663 register REGEXP *rx = pm->op_pmregexp;
668 if (op->op_flags & OPf_STACKED)
677 DIE("panic: do_match");
679 if (pm->op_pmflags & PMf_USED) {
680 if (gimme == G_ARRAY)
685 if (!rx->prelen && curpm) {
687 rx = pm->op_pmregexp;
690 if (global = pm->op_pmflags & PMf_GLOBAL) {
692 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
693 MAGIC* mg = mg_find(TARG, 'g');
694 if (mg && mg->mg_len >= 0) {
695 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
696 minmatch = (mg->mg_flags & MGf_MINMATCH);
700 if (!rx->nparens && !global)
701 gimme = G_SCALAR; /* accidental array context? */
702 safebase = (gimme == G_ARRAY) || global;
703 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
705 multiline = pm->op_pmflags & PMf_MULTILINE;
709 if (global && rx->startp[0]) {
713 minmatch = (s == rx->startp[0]);
715 if (pm->op_pmshort) {
716 if (pm->op_pmflags & PMf_SCANFIRST) {
717 if (SvSCREAM(TARG)) {
718 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
720 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
722 else if (pm->op_pmflags & PMf_ALL)
725 else if (!(s = fbm_instr((unsigned char*)s,
726 (unsigned char*)strend, pm->op_pmshort)))
728 else if (pm->op_pmflags & PMf_ALL)
730 if (s && rx->regback >= 0) {
731 ++BmUSEFUL(pm->op_pmshort);
739 else if (!multiline) {
740 if (*SvPVX(pm->op_pmshort) != *s ||
741 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
742 if (pm->op_pmflags & PMf_FOLD) {
743 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
750 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
751 SvREFCNT_dec(pm->op_pmshort);
752 pm->op_pmshort = Nullsv; /* opt is being useless */
755 if (regexec(rx, s, strend, truebase, minmatch,
756 SvSCREAM(TARG) ? TARG : Nullsv,
759 if (pm->op_pmflags & PMf_ONCE)
760 pm->op_pmflags |= PMf_USED;
768 if (gimme == G_ARRAY) {
772 if (global && !iters)
776 EXTEND(SP, iters + i);
777 for (i = !i; i <= iters; i++) {
778 PUSHs(sv_newmortal());
780 if ((s = rx->startp[i]) && rx->endp[i] ) {
781 len = rx->endp[i] - s;
782 sv_setpvn(*SP, s, len);
786 truebase = rx->subbeg;
787 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
796 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
797 mg = mg_find(TARG, 'g');
799 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
800 mg = mg_find(TARG, 'g');
803 mg->mg_len = rx->endp[0] - truebase;
804 if (rx->startp[0] == rx->endp[0])
805 mg->mg_flags |= MGf_MINMATCH;
807 mg->mg_flags &= ~MGf_MINMATCH;
816 ++BmUSEFUL(pm->op_pmshort);
818 if (pm->op_pmflags & PMf_ONCE)
819 pm->op_pmflags |= PMf_USED;
821 rx->subbeg = truebase;
824 rx->endp[0] = s + SvCUR(pm->op_pmshort);
831 Safefree(rx->subbase);
832 tmps = rx->subbase = savepvn(t, strend-t);
834 rx->subend = tmps + (strend-t);
835 tmps = rx->startp[0] = tmps + (s - t);
836 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
842 ++BmUSEFUL(pm->op_pmshort);
846 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
847 MAGIC* mg = mg_find(TARG, 'g');
852 if (gimme == G_ARRAY)
865 register IO *io = GvIO(last_in_gv);
866 register I32 type = op->op_type;
872 if (IoFLAGS(io) & IOf_ARGV) {
873 if (IoFLAGS(io) & IOf_START) {
874 IoFLAGS(io) &= ~IOf_START;
876 if (av_len(GvAVn(last_in_gv)) < 0) {
877 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
878 av_push(GvAVn(last_in_gv), tmpstr);
881 fp = nextargv(last_in_gv);
882 if (!fp) { /* Note: fp != IoIFP(io) */
883 (void)do_close(last_in_gv, FALSE); /* now it does*/
884 IoFLAGS(io) |= IOf_START;
887 else if (type == OP_GLOB) {
888 SV *tmpcmd = NEWSV(55, 0);
892 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
893 /* since spawning off a process is a real performance hit */
896 #include <lib$routines.h>
899 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
900 char vmsspec[NAM$C_MAXRSS+1];
901 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
902 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
903 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
906 struct dsc$descriptor_s wilddsc
907 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
908 struct dsc$descriptor_vs rsdsc
909 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
910 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
912 /* We could find out if there's an explicit dev/dir or version
913 by peeking into lib$find_file's internal context at
914 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
915 but that's unsupported, so I don't want to do it now and
916 have it bite someone in the future. */
917 strcat(tmpfnam,tmpnam(NULL));
918 cp = SvPV(tmpglob,i);
920 if (cp[i] == ';') hasver = 1;
929 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
934 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
935 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
936 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
937 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
938 &dfltdsc,NULL,NULL,NULL))&1)) {
939 end = rstr + (unsigned long int) *rslt;
940 if (!hasver) while (*end != ';') end--;
941 *(end++) = '\n'; *end = '\0';
942 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
944 if (isunix) trim_unixpath(SvPVX(tmpglob),rstr);
949 while (*(--begin) != ']' && *begin != '>') ;
952 ok = (fputs(begin,tmpfp) != EOF);
954 if (cxt) (void)lib$find_file_end(&cxt);
955 if (ok && sts != RMS$_NMF &&
956 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
963 IoIFP(io) = fp = tmpfp;
969 sv_setpv(tmpcmd, "perlglob ");
970 sv_catsv(tmpcmd, tmpglob);
971 sv_catpv(tmpcmd, " |");
974 sv_setpvn(tmpcmd, cshname, cshlen);
975 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
976 sv_catsv(tmpcmd, tmpglob);
977 sv_catpv(tmpcmd, "'|");
979 sv_setpv(tmpcmd, "echo ");
980 sv_catsv(tmpcmd, tmpglob);
982 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
984 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
988 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),Nullfp);
994 else if (type == OP_GLOB)
998 if (dowarn && !(IoFLAGS(io) & IOf_START))
999 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1000 if (GIMME == G_SCALAR) {
1001 (void)SvOK_off(TARG);
1006 if (GIMME == G_ARRAY) {
1007 sv = sv_2mortal(NEWSV(57, 80));
1012 (void)SvUPGRADE(sv, SVt_PV);
1013 tmplen = SvLEN(sv); /* remember if already alloced */
1015 Sv_Grow(sv, 80); /* try short-buffering it */
1016 if (type == OP_RCATLINE)
1022 if (!sv_gets(sv, fp, offset)) {
1024 if (IoFLAGS(io) & IOf_ARGV) {
1025 fp = nextargv(last_in_gv);
1028 (void)do_close(last_in_gv, FALSE);
1029 IoFLAGS(io) |= IOf_START;
1031 else if (type == OP_GLOB) {
1032 (void)do_close(last_in_gv, FALSE);
1034 if (GIMME == G_SCALAR) {
1035 (void)SvOK_off(TARG);
1044 SvTAINT(sv); /* Anything from the outside world...*/
1046 if (type == OP_GLOB) {
1051 if (*SvEND(sv) == rschar)
1055 for (tmps = SvPVX(sv); *tmps; tmps++)
1056 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1057 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1059 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1060 (void)POPs; /* Unmatched wildcard? Chuck it... */
1064 if (GIMME == G_ARRAY) {
1065 if (SvLEN(sv) - SvCUR(sv) > 20) {
1066 SvLEN_set(sv, SvCUR(sv)+1);
1067 Renew(SvPVX(sv), SvLEN(sv), char);
1069 sv = sv_2mortal(NEWSV(58, 80));
1072 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1073 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1077 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1078 Renew(SvPVX(sv), SvLEN(sv), char);
1087 register CONTEXT *cx;
1091 * We don't just use the GIMME macro here because it assumes there's
1092 * already a context, which ain't necessarily so at initial startup.
1095 if (op->op_flags & OPf_KNOW)
1096 gimme = op->op_flags & OPf_LIST;
1097 else if (cxstack_ix >= 0)
1098 gimme = cxstack[cxstack_ix].blk_gimme;
1105 PUSHBLOCK(cx, CXt_BLOCK, sp);
1116 char *key = SvPV(keysv, keylen);
1118 I32 lval = op->op_flags & OPf_MOD;
1120 if (SvTYPE(hv) != SVt_PVHV)
1122 svp = hv_fetch(hv, key, keylen, lval);
1124 if (!svp || *svp == &sv_undef)
1126 if (op->op_private & OPpLVAL_INTRO)
1128 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1133 (void)SvUPGRADE(sv, SVt_RV);
1134 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1135 (SV*)newHV() : (SV*)newAV());
1141 PUSHs(svp ? *svp : &sv_undef);
1148 register CONTEXT *cx;
1154 if (op->op_flags & OPf_SPECIAL) {
1155 cx = &cxstack[cxstack_ix];
1156 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1161 if (op->op_flags & OPf_KNOW)
1162 gimme = op->op_flags & OPf_LIST;
1163 else if (cxstack_ix >= 0)
1164 gimme = cxstack[cxstack_ix].blk_gimme;
1168 if (gimme == G_SCALAR) {
1169 if (op->op_private & OPpLEAVE_VOID)
1174 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1177 *MARK = sv_mortalcopy(TOPs);
1186 for (mark = newsp + 1; mark <= SP; mark++)
1187 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1188 *mark = sv_mortalcopy(*mark);
1189 /* in case LEAVE wipes old return values */
1191 curpm = newpm; /* Don't pop $1 et al till now */
1201 register CONTEXT *cx;
1205 cx = &cxstack[cxstack_ix];
1206 if (cx->cx_type != CXt_LOOP)
1207 DIE("panic: pp_iter");
1209 if (cx->blk_loop.iterix >= cx->blk_oldsp)
1212 if (sv = AvARRAY(cx->blk_loop.iterary)[++cx->blk_loop.iterix]) {
1214 *cx->blk_loop.itervar = sv;
1217 *cx->blk_loop.itervar = &sv_undef;
1225 register PMOP *pm = cPMOP;
1240 register REGEXP *rx = pm->op_pmregexp;
1242 int force_on_match = 0;
1244 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1246 if (op->op_flags & OPf_STACKED)
1252 s = SvPV(TARG, len);
1253 if (!SvPOKp(TARG) || SvREADONLY(TARG))
1258 DIE("panic: do_subst");
1261 maxiters = (strend - s) + 10;
1263 if (!rx->prelen && curpm) {
1265 rx = pm->op_pmregexp;
1267 safebase = ((!rx || !rx->nparens) && !sawampersand);
1268 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1270 multiline = pm->op_pmflags & PMf_MULTILINE;
1273 if (pm->op_pmshort) {
1274 if (pm->op_pmflags & PMf_SCANFIRST) {
1275 if (SvSCREAM(TARG)) {
1276 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1278 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1281 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1284 if (s && rx->regback >= 0) {
1285 ++BmUSEFUL(pm->op_pmshort);
1293 else if (!multiline) {
1294 if (*SvPVX(pm->op_pmshort) != *s ||
1295 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1296 if (pm->op_pmflags & PMf_FOLD) {
1297 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1304 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1305 SvREFCNT_dec(pm->op_pmshort);
1306 pm->op_pmshort = Nullsv; /* opt is being useless */
1309 once = !(rpm->op_pmflags & PMf_GLOBAL);
1310 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1311 c = SvPV(dstr, clen);
1312 if (clen <= rx->minlen) {
1313 /* can do inplace substitution */
1314 if (regexec(rx, s, strend, orig, 0,
1315 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1316 if (force_on_match) {
1318 s = SvPV_force(TARG, len);
1321 if (rx->subbase) /* oops, no we can't */
1325 SvSCREAM_off(TARG); /* disable possible screamer */
1330 if (m - s > strend - d) { /* faster to shorten from end */
1332 Copy(c, m, clen, char);
1337 Move(d, m, i, char);
1341 SvCUR_set(TARG, m - s);
1342 (void)SvPOK_only(TARG);
1348 else if (i = m - s) { /* faster from front */
1356 Copy(c, m, clen, char);
1357 (void)SvPOK_only(TARG);
1365 Copy(c, d, clen, char);
1366 (void)SvPOK_only(TARG);
1373 (void)SvPOK_only(TARG);
1381 if (iters++ > maxiters)
1382 DIE("Substitution loop");
1387 Move(s, d, i, char);
1391 Copy(c, d, clen, char);
1395 } while (regexec(rx, s, strend, orig, s == m,
1396 Nullsv, TRUE)); /* (don't match same null twice) */
1399 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1400 Move(s, d, i+1, char); /* include the Null */
1402 (void)SvPOK_only(TARG);
1404 PUSHs(sv_2mortal(newSViv((I32)iters)));
1413 if (regexec(rx, s, strend, orig, 0,
1414 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1416 if (force_on_match) {
1418 s = SvPV_force(TARG, len);
1421 dstr = NEWSV(25, sv_len(TARG));
1422 sv_setpvn(dstr, m, s-m);
1425 register CONTEXT *cx;
1427 RETURNOP(cPMOP->op_pmreplroot);
1430 if (iters++ > maxiters)
1431 DIE("Substitution loop");
1432 if (rx->subbase && rx->subbase != orig) {
1437 strend = s + (strend - m);
1440 sv_catpvn(dstr, s, m-s);
1443 sv_catpvn(dstr, c, clen);
1446 } while (regexec(rx, s, strend, orig, s == m, Nullsv,
1448 sv_catpvn(dstr, s, strend - s);
1450 Safefree(SvPVX(TARG));
1451 SvPVX(TARG) = SvPVX(dstr);
1452 SvCUR_set(TARG, SvCUR(dstr));
1453 SvLEN_set(TARG, SvLEN(dstr));
1457 (void)SvPOK_only(TARG);
1459 PUSHs(sv_2mortal(newSViv((I32)iters)));
1466 ++BmUSEFUL(pm->op_pmshort);
1476 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1478 LEAVE; /* exit inner scope */
1481 if (stack_base + *markstack_ptr > sp) {
1484 LEAVE; /* exit outer scope */
1485 (void)POPMARK; /* pop src */
1486 items = --*markstack_ptr - markstack_ptr[-1];
1487 (void)POPMARK; /* pop dst */
1488 SP = stack_base + POPMARK; /* pop original mark */
1489 if (GIMME != G_ARRAY) {
1500 ENTER; /* enter inner scope */
1503 src = stack_base[*markstack_ptr];
1507 RETURNOP(cLOGOP->op_other);
1518 register CONTEXT *cx;
1523 if (gimme == G_SCALAR) {
1526 if (SvFLAGS(TOPs) & SVs_TEMP)
1529 *MARK = sv_mortalcopy(TOPs);
1537 for (mark = newsp + 1; mark <= SP; mark++)
1538 if (!(SvFLAGS(*mark) & SVs_TEMP))
1539 *mark = sv_mortalcopy(*mark);
1540 /* in case LEAVE wipes old return values */
1543 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1544 AV* av = cx->blk_sub.argarray;
1549 curpm = newpm; /* Don't pop $1 et al till now */
1553 return pop_return();
1562 register CONTEXT *cx;
1565 DIE("Not a CODE reference");
1566 switch (SvTYPE(sv)) {
1571 if (sv == &sv_yes) /* unfound import, ignore */
1574 DIE(no_usym, "a subroutine");
1576 if (op->op_private & HINT_STRICT_REFS)
1577 DIE(no_symref, sym, "a subroutine");
1578 cv = perl_get_cv(sym, TRUE);
1582 if (SvTYPE(cv) == SVt_PVCV)
1587 DIE("Not a CODE reference");
1592 if (!(cv = GvCV((GV*)sv)))
1593 cv = sv_2cv(sv, &stash, &gv, TRUE);
1602 DIE("Not a CODE reference");
1604 if (!CvROOT(cv) && !CvXSUB(cv)) {
1605 if (gv = CvGV(cv)) {
1606 SV *tmpstr = sv_newmortal();
1608 gv_efullname(tmpstr, gv);
1609 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1610 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1612 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1616 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1618 DIE("Undefined subroutine called");
1621 if ((op->op_private & OPpDEREF_DB) && !CvXSUB(cv)) {
1624 if (SvFLAGS(cv) & SVpcv_ANON) /* Is GV potentially non-unique? */
1625 sv_setsv(sv, newRV((SV*)cv));
1628 gv_efullname(sv,gv);
1632 DIE("No DBsub routine");
1636 if (CvOLDSTYLE(cv)) {
1637 I32 (*fp3)_((int,int,int));
1639 register I32 items = SP - MARK;
1644 stack_sp = mark + 1;
1645 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1646 items = (*fp3)(CvXSUBANY(cv).any_i32,
1647 MARK - stack_base + 1,
1649 stack_sp = stack_base + items;
1652 I32 markix = TOPMARK;
1655 (void)(*CvXSUB(cv))(cv);
1657 /* Enforce some sanity in scalar context. */
1658 if (GIMME == G_SCALAR && ++markix != stack_sp - stack_base ) {
1659 if (markix > stack_sp - stack_base)
1660 *(stack_base + markix) = &sv_undef;
1662 *(stack_base + markix) = *stack_sp;
1663 stack_sp = stack_base + markix;
1671 register I32 items = SP - MARK;
1672 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1674 AV* padlist = CvPADLIST(cv);
1675 SV** svp = AvARRAY(padlist);
1676 push_return(op->op_next);
1677 PUSHBLOCK(cx, CXt_SUB, MARK);
1680 if (CvDEPTH(cv) < 2)
1681 (void)SvREFCNT_inc(cv);
1682 else { /* save temporaries on recursion? */
1683 if (CvDEPTH(cv) == 100 && dowarn)
1684 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1685 if (CvDEPTH(cv) > AvFILL(padlist)) {
1687 AV *newpad = newAV();
1688 AV *oldpad = (AV*)AvARRAY(svp[CvDEPTH(cv)-1]);
1689 I32 ix = AvFILL((AV*)svp[1]);
1690 svp = AvARRAY(svp[0]);
1691 for ( ;ix > 0; ix--) {
1692 if (svp[ix] != &sv_undef) {
1693 char *name = SvPVX(svp[ix]);
1694 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1695 av_store(newpad, ix,
1696 SvREFCNT_inc(AvARRAY(oldpad)[ix]) );
1698 else { /* our own lexical */
1700 av_store(newpad, ix, sv = (SV*)newAV());
1701 else if (*name == '%')
1702 av_store(newpad, ix, sv = (SV*)newHV());
1704 av_store(newpad, ix, sv = NEWSV(0,0));
1709 av_store(newpad, ix, sv = NEWSV(0,0));
1713 av = newAV(); /* will be @_ */
1715 av_store(newpad, 0, (SV*)av);
1716 AvFLAGS(av) = AVf_REIFY;
1717 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1718 AvFILL(padlist) = CvDEPTH(cv);
1719 svp = AvARRAY(padlist);
1723 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1725 AV* av = (AV*)curpad[0];
1732 cx->blk_sub.savearray = GvAV(defgv);
1733 cx->blk_sub.argarray = av;
1734 GvAV(defgv) = cx->blk_sub.argarray;
1737 if (items > AvMAX(av) + 1) {
1739 if (AvARRAY(av) != ary) {
1740 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1741 SvPVX(av) = (char*)ary;
1743 if (items > AvMAX(av) + 1) {
1744 AvMAX(av) = items - 1;
1745 Renew(ary,items,SV*);
1747 SvPVX(av) = (char*)ary;
1750 Copy(MARK,AvARRAY(av),items,SV*);
1751 AvFILL(av) = items - 1;
1759 RETURNOP(CvSTART(cv));
1769 I32 lval = op->op_flags & OPf_MOD;
1772 elem -= curcop->cop_arybase;
1773 if (SvTYPE(av) != SVt_PVAV)
1775 svp = av_fetch(av, elem, lval);
1777 if (!svp || *svp == &sv_undef)
1778 DIE(no_aelem, elem);
1779 if (op->op_private & OPpLVAL_INTRO)
1781 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1786 (void)SvUPGRADE(sv, SVt_RV);
1787 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1788 (SV*)newHV() : (SV*)newAV());
1794 PUSHs(svp ? *svp : &sv_undef);
1807 sv = *(stack_base + TOPMARK + 1);
1817 !(packname = SvPV(sv, na)) ||
1818 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1819 !(ob=(SV*)GvIO(iogv)))
1821 char *name = SvPV(nm, na);
1823 if (!packname || !isALPHA(*packname))
1824 DIE("Can't call method \"%s\" without a package or object reference", name);
1825 if (!(stash = gv_stashpv(packname, FALSE))) {
1826 if (gv_stashpv("UNIVERSAL", FALSE))
1827 stash = gv_stashpv(packname, TRUE);
1829 DIE("Can't call method \"%s\" in empty package \"%s\"",
1832 gv = gv_fetchmethod(stash,name);
1834 DIE("Can't locate object method \"%s\" via package \"%s\"",
1839 *(stack_base + TOPMARK + 1) = iogv;
1842 if (!ob || !SvOBJECT(ob)) {
1843 char *name = SvPV(nm, na);
1844 DIE("Can't call method \"%s\" on unblessed reference", name);
1847 if (!gv) { /* nothing cached */
1848 char *name = SvPV(nm, na);
1849 gv = gv_fetchmethod(SvSTASH(ob),name);
1851 DIE("Can't locate object method \"%s\" via package \"%s\"",
1852 name, HvNAME(SvSTASH(ob)));