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);
147 if (SvGMAGICAL(left))
151 sv_setpvn(TARG,s,len);
153 else if (!SvOK(TARG)) {
154 s = SvPV_force(TARG, len);
155 sv_setpv(TARG, ""); /* Suppress warning. */
158 sv_catpvn(TARG,s,len);
168 if (op->op_flags & OPf_MOD) {
169 if (op->op_private & OPpLVAL_INTRO)
170 SAVECLEARSV(curpad[op->op_targ]);
171 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
172 SV* sv = curpad[op->op_targ];
178 (void)SvUPGRADE(sv, SVt_RV);
179 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
180 (SV*)newHV() : (SV*)newAV());
191 last_in_gv = (GV*)(*stack_sp--);
192 return do_readline();
197 dSP; tryAMAGICbinSET(eq,0);
200 SETs((TOPn == value) ? &sv_yes : &sv_no);
210 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
225 RETURNOP(cLOGOP->op_other);
231 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
234 SETn( left + right );
242 AV *av = GvAV((GV*)cSVOP->op_sv);
243 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
244 PUSHs(svp ? *svp : &sv_undef);
252 do_join(TARG, *MARK, MARK, SP);
265 /* Oversized hot code. */
269 dSP; dMARK; dORIGMARK;
274 if (op->op_flags & OPf_STACKED)
278 if (!(io = GvIO(gv))) {
280 SV* sv = sv_newmortal();
282 warn("Filehandle %s never opened", SvPV(sv,na));
285 SETERRNO(EBADF,RMS$_IFI);
288 else if (!(fp = IoOFP(io))) {
290 SV* sv = sv_newmortal();
293 warn("Filehandle %s opened only for input", SvPV(sv,na));
295 warn("print on closed filehandle %s", SvPV(sv,na));
297 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
304 if (!do_print(*MARK, fp))
308 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
317 if (!do_print(*MARK, fp))
326 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
329 if (IoFLAGS(io) & IOf_FLUSH)
330 if (fflush(fp) == EOF)
353 if (SvTYPE(av) != SVt_PVAV)
354 DIE("Not an ARRAY reference");
355 if (op->op_private & OPpLVAL_INTRO)
356 av = (AV*)save_svref((SV**)sv);
357 if (op->op_flags & OPf_REF) {
363 if (SvTYPE(sv) == SVt_PVAV) {
365 if (op->op_flags & OPf_REF) {
371 if (SvTYPE(sv) != SVt_PVGV) {
374 if (SvGMAGICAL(sv)) {
380 if (op->op_flags & OPf_REF ||
381 op->op_private & HINT_STRICT_REFS)
382 DIE(no_usym, "an ARRAY");
383 if (GIMME == G_ARRAY)
388 if (op->op_private & HINT_STRICT_REFS)
389 DIE(no_symref, sym, "an ARRAY");
390 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
393 if (op->op_private & OPpLVAL_INTRO)
395 if (op->op_flags & OPf_REF) {
402 if (GIMME == G_ARRAY) {
403 I32 maxarg = AvFILL(av) + 1;
405 Copy(AvARRAY(av), SP+1, maxarg, SV*);
410 I32 maxarg = AvFILL(av) + 1;
426 if (SvTYPE(hv) != SVt_PVHV)
427 DIE("Not a HASH reference");
428 if (op->op_private & OPpLVAL_INTRO)
429 hv = (HV*)save_svref((SV**)sv);
430 if (op->op_flags & OPf_REF) {
436 if (SvTYPE(sv) == SVt_PVHV) {
438 if (op->op_flags & OPf_REF) {
444 if (SvTYPE(sv) != SVt_PVGV) {
447 if (SvGMAGICAL(sv)) {
453 if (op->op_flags & OPf_REF ||
454 op->op_private & HINT_STRICT_REFS)
455 DIE(no_usym, "a HASH");
456 if (GIMME == G_ARRAY) {
463 if (op->op_private & HINT_STRICT_REFS)
464 DIE(no_symref, sym, "a HASH");
465 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
468 if (op->op_private & OPpLVAL_INTRO)
470 if (op->op_flags & OPf_REF) {
477 if (GIMME == G_ARRAY) { /* array wanted */
484 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
497 SV **lastlelem = stack_sp;
498 SV **lastrelem = stack_base + POPMARK;
499 SV **firstrelem = stack_base + POPMARK + 1;
500 SV **firstlelem = lastrelem + 1;
512 delaymagic = DM_DELAY; /* catch simultaneous items */
514 /* If there's a common identifier on both sides we have to take
515 * special care that assigning the identifier on the left doesn't
516 * clobber a value on the right that's used later in the list.
518 if (op->op_private & OPpASSIGN_COMMON) {
519 for (relem = firstrelem; relem <= lastrelem; relem++) {
522 *relem = sv_mortalcopy(sv);
530 while (lelem <= lastlelem) {
531 tainted = 0; /* Each item stands on its own, taintwise. */
533 switch (SvTYPE(sv)) {
536 magic = SvMAGICAL(ary) != 0;
540 while (relem <= lastrelem) { /* gobble up all the rest */
545 (void)av_store(ary,i++,sv);
556 magic = SvMAGICAL(hash) != 0;
559 while (relem < lastrelem) { /* gobble up all the rest */
564 sv = &sv_no, relem++;
565 tmps = SvPV(sv, len);
566 tmpstr = NEWSV(29,0);
568 sv_setsv(tmpstr,*relem); /* value */
570 (void)hv_store(hash,tmps,len,tmpstr,0);
578 if (SvTHINKFIRST(sv)) {
579 if (SvREADONLY(sv) && curcop != &compiling) {
580 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
582 if (relem <= lastrelem)
589 if (relem <= lastrelem) {
590 sv_setsv(sv, *relem);
594 sv_setsv(sv, &sv_undef);
599 if (delaymagic & ~DM_DELAY) {
600 if (delaymagic & DM_UID) {
602 (void)setresuid(uid,euid,(Uid_t)-1);
605 (void)setreuid(uid,euid);
608 if ((delaymagic & DM_UID) == DM_RUID) {
610 delaymagic &= ~DM_RUID;
612 # endif /* HAS_SETRUID */
614 if ((delaymagic & DM_UID) == DM_EUID) {
616 delaymagic &= ~DM_EUID;
618 # endif /* HAS_SETEUID */
619 if (delaymagic & DM_UID) {
621 DIE("No setreuid available");
624 # endif /* HAS_SETREUID */
625 #endif /* HAS_SETRESUID */
627 euid = (int)geteuid();
629 if (delaymagic & DM_GID) {
631 (void)setresgid(gid,egid,(Gid_t)-1);
634 (void)setregid(gid,egid);
637 if ((delaymagic & DM_GID) == DM_RGID) {
639 delaymagic &= ~DM_RGID;
641 # endif /* HAS_SETRGID */
643 if ((delaymagic & DM_GID) == DM_EGID) {
645 delaymagic &= ~DM_EGID;
647 # endif /* HAS_SETEGID */
648 if (delaymagic & DM_GID) {
650 DIE("No setregid available");
653 # endif /* HAS_SETREGID */
654 #endif /* HAS_SETRESGID */
656 egid = (int)getegid();
658 tainting |= (uid && (euid != uid || egid != gid));
661 if (GIMME == G_ARRAY) {
665 SP = firstrelem + (lastlelem - firstlelem);
672 SETi(lastrelem - firstrelem + 1);
680 register PMOP *pm = cPMOP;
687 register REGEXP *rx = pm->op_pmregexp;
691 I32 oldsave = savestack_ix;
693 if (op->op_flags & OPf_STACKED)
702 DIE("panic: do_match");
704 if (pm->op_pmflags & PMf_USED) {
705 if (gimme == G_ARRAY)
710 if (!rx->prelen && curpm) {
712 rx = pm->op_pmregexp;
715 if (global = pm->op_pmflags & PMf_GLOBAL) {
717 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
718 MAGIC* mg = mg_find(TARG, 'g');
719 if (mg && mg->mg_len >= 0) {
720 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
721 minmatch = (mg->mg_flags & MGf_MINMATCH);
725 if (!rx->nparens && !global)
726 gimme = G_SCALAR; /* accidental array context? */
727 safebase = (gimme == G_ARRAY) || global;
728 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
730 multiline = pm->op_pmflags & PMf_MULTILINE;
734 if (global && rx->startp[0]) {
738 minmatch = (s == rx->startp[0]);
740 if (pm->op_pmshort) {
741 if (pm->op_pmflags & PMf_SCANFIRST) {
742 if (SvSCREAM(TARG)) {
743 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
745 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
747 else if (pm->op_pmflags & PMf_ALL)
750 else if (!(s = fbm_instr((unsigned char*)s,
751 (unsigned char*)strend, pm->op_pmshort)))
753 else if (pm->op_pmflags & PMf_ALL)
755 if (s && rx->regback >= 0) {
756 ++BmUSEFUL(pm->op_pmshort);
764 else if (!multiline) {
765 if (*SvPVX(pm->op_pmshort) != *s ||
766 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
767 if (pm->op_pmflags & PMf_FOLD) {
768 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
775 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
776 SvREFCNT_dec(pm->op_pmshort);
777 pm->op_pmshort = Nullsv; /* opt is being useless */
780 if (pregexec(rx, s, strend, truebase, minmatch,
781 SvSCREAM(TARG) ? TARG : Nullsv,
784 if (pm->op_pmflags & PMf_ONCE)
785 pm->op_pmflags |= PMf_USED;
793 if (gimme == G_ARRAY) {
797 if (global && !iters)
801 EXTEND(SP, iters + i);
802 for (i = !i; i <= iters; i++) {
803 PUSHs(sv_newmortal());
805 if ((s = rx->startp[i]) && rx->endp[i] ) {
806 len = rx->endp[i] - s;
807 sv_setpvn(*SP, s, len);
811 truebase = rx->subbeg;
812 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
816 LEAVE_SCOPE(oldsave);
822 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
823 mg = mg_find(TARG, 'g');
825 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
826 mg = mg_find(TARG, 'g');
829 mg->mg_len = rx->endp[0] - truebase;
830 if (rx->startp[0] == rx->endp[0])
831 mg->mg_flags |= MGf_MINMATCH;
833 mg->mg_flags &= ~MGf_MINMATCH;
838 LEAVE_SCOPE(oldsave);
843 ++BmUSEFUL(pm->op_pmshort);
845 if (pm->op_pmflags & PMf_ONCE)
846 pm->op_pmflags |= PMf_USED;
848 rx->subbeg = truebase;
851 rx->endp[0] = s + SvCUR(pm->op_pmshort);
858 Safefree(rx->subbase);
859 tmps = rx->subbase = savepvn(t, strend-t);
861 rx->subend = tmps + (strend-t);
862 tmps = rx->startp[0] = tmps + (s - t);
863 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
865 LEAVE_SCOPE(oldsave);
870 ++BmUSEFUL(pm->op_pmshort);
874 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
875 MAGIC* mg = mg_find(TARG, 'g');
880 LEAVE_SCOPE(oldsave);
881 if (gimme == G_ARRAY)
894 register IO *io = GvIO(last_in_gv);
895 register I32 type = op->op_type;
901 if (IoFLAGS(io) & IOf_ARGV) {
902 if (IoFLAGS(io) & IOf_START) {
903 IoFLAGS(io) &= ~IOf_START;
905 if (av_len(GvAVn(last_in_gv)) < 0) {
906 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
907 av_push(GvAVn(last_in_gv), tmpstr);
910 fp = nextargv(last_in_gv);
911 if (!fp) { /* Note: fp != IoIFP(io) */
912 (void)do_close(last_in_gv, FALSE); /* now it does*/
913 IoFLAGS(io) |= IOf_START;
916 else if (type == OP_GLOB) {
917 SV *tmpcmd = NEWSV(55, 0);
921 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
922 /* since spawning off a process is a real performance hit */
925 #include <lib$routines.h>
928 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
929 char vmsspec[NAM$C_MAXRSS+1];
930 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
931 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
932 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
935 struct dsc$descriptor_s wilddsc
936 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
937 struct dsc$descriptor_vs rsdsc
938 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
939 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
941 /* We could find out if there's an explicit dev/dir or version
942 by peeking into lib$find_file's internal context at
943 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
944 but that's unsupported, so I don't want to do it now and
945 have it bite someone in the future. */
946 strcat(tmpfnam,tmpnam(NULL));
947 cp = SvPV(tmpglob,i);
949 if (cp[i] == ';') hasver = 1;
958 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
963 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
964 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
965 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
966 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
967 &dfltdsc,NULL,NULL,NULL))&1)) {
968 end = rstr + (unsigned long int) *rslt;
969 if (!hasver) while (*end != ';') end--;
970 *(end++) = '\n'; *end = '\0';
971 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
973 if (isunix) trim_unixpath(SvPVX(tmpglob),rstr);
978 while (*(--begin) != ']' && *begin != '>') ;
981 ok = (fputs(begin,tmpfp) != EOF);
983 if (cxt) (void)lib$find_file_end(&cxt);
984 if (ok && sts != RMS$_NMF &&
985 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
992 IoIFP(io) = fp = tmpfp;
998 sv_setpv(tmpcmd, "perlglob ");
999 sv_catsv(tmpcmd, tmpglob);
1000 sv_catpv(tmpcmd, " |");
1003 sv_setpvn(tmpcmd, cshname, cshlen);
1004 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1005 sv_catsv(tmpcmd, tmpglob);
1006 sv_catpv(tmpcmd, "' 2>/dev/null |");
1008 sv_setpv(tmpcmd, "echo ");
1009 sv_catsv(tmpcmd, tmpglob);
1011 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1013 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1017 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),Nullfp);
1023 else if (type == OP_GLOB)
1027 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1028 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1029 if (GIMME == G_SCALAR) {
1030 (void)SvOK_off(TARG);
1035 if (GIMME == G_ARRAY) {
1036 sv = sv_2mortal(NEWSV(57, 80));
1041 (void)SvUPGRADE(sv, SVt_PV);
1042 tmplen = SvLEN(sv); /* remember if already alloced */
1044 Sv_Grow(sv, 80); /* try short-buffering it */
1045 if (type == OP_RCATLINE)
1051 if (!sv_gets(sv, fp, offset)) {
1053 if (IoFLAGS(io) & IOf_ARGV) {
1054 fp = nextargv(last_in_gv);
1057 (void)do_close(last_in_gv, FALSE);
1058 IoFLAGS(io) |= IOf_START;
1060 else if (type == OP_GLOB) {
1061 (void)do_close(last_in_gv, FALSE);
1063 if (GIMME == G_SCALAR) {
1064 (void)SvOK_off(TARG);
1073 SvTAINT(sv); /* Anything from the outside world...*/
1075 if (type == OP_GLOB) {
1080 if (*SvEND(sv) == rschar)
1084 for (tmps = SvPVX(sv); *tmps; tmps++)
1085 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1086 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1088 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1089 (void)POPs; /* Unmatched wildcard? Chuck it... */
1093 if (GIMME == G_ARRAY) {
1094 if (SvLEN(sv) - SvCUR(sv) > 20) {
1095 SvLEN_set(sv, SvCUR(sv)+1);
1096 Renew(SvPVX(sv), SvLEN(sv), char);
1098 sv = sv_2mortal(NEWSV(58, 80));
1101 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1102 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1106 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1107 Renew(SvPVX(sv), SvLEN(sv), char);
1116 register CONTEXT *cx;
1120 * We don't just use the GIMME macro here because it assumes there's
1121 * already a context, which ain't necessarily so at initial startup.
1124 if (op->op_flags & OPf_KNOW)
1125 gimme = op->op_flags & OPf_LIST;
1126 else if (cxstack_ix >= 0)
1127 gimme = cxstack[cxstack_ix].blk_gimme;
1134 PUSHBLOCK(cx, CXt_BLOCK, sp);
1145 char *key = SvPV(keysv, keylen);
1147 I32 lval = op->op_flags & OPf_MOD;
1149 if (SvTYPE(hv) != SVt_PVHV)
1151 svp = hv_fetch(hv, key, keylen, lval);
1153 if (!svp || *svp == &sv_undef)
1155 if (op->op_private & OPpLVAL_INTRO)
1157 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1162 (void)SvUPGRADE(sv, SVt_RV);
1163 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1164 (SV*)newHV() : (SV*)newAV());
1170 PUSHs(svp ? *svp : &sv_undef);
1177 register CONTEXT *cx;
1183 if (op->op_flags & OPf_SPECIAL) {
1184 cx = &cxstack[cxstack_ix];
1185 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1190 if (op->op_flags & OPf_KNOW)
1191 gimme = op->op_flags & OPf_LIST;
1192 else if (cxstack_ix >= 0)
1193 gimme = cxstack[cxstack_ix].blk_gimme;
1197 if (gimme == G_SCALAR) {
1198 if (op->op_private & OPpLEAVE_VOID)
1203 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1206 *MARK = sv_mortalcopy(TOPs);
1215 for (mark = newsp + 1; mark <= SP; mark++)
1216 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1217 *mark = sv_mortalcopy(*mark);
1218 /* in case LEAVE wipes old return values */
1220 curpm = newpm; /* Don't pop $1 et al till now */
1230 register CONTEXT *cx;
1235 cx = &cxstack[cxstack_ix];
1236 if (cx->cx_type != CXt_LOOP)
1237 DIE("panic: pp_iter");
1238 av = cx->blk_loop.iterary;
1239 if (av == stack && cx->blk_loop.iterix >= cx->blk_oldsp)
1242 if (cx->blk_loop.iterix >= AvFILL(av))
1245 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1247 *cx->blk_loop.itervar = sv;
1250 *cx->blk_loop.itervar = &sv_undef;
1258 register PMOP *pm = cPMOP;
1273 register REGEXP *rx = pm->op_pmregexp;
1275 int force_on_match = 0;
1276 I32 oldsave = savestack_ix;
1278 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1280 if (op->op_flags & OPf_STACKED)
1286 s = SvPV(TARG, len);
1287 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1292 DIE("panic: do_subst");
1295 maxiters = (strend - s) + 10;
1297 if (!rx->prelen && curpm) {
1299 rx = pm->op_pmregexp;
1301 safebase = ((!rx || !rx->nparens) && !sawampersand);
1302 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1304 multiline = pm->op_pmflags & PMf_MULTILINE;
1307 if (pm->op_pmshort) {
1308 if (pm->op_pmflags & PMf_SCANFIRST) {
1309 if (SvSCREAM(TARG)) {
1310 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1312 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1315 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1318 if (s && rx->regback >= 0) {
1319 ++BmUSEFUL(pm->op_pmshort);
1327 else if (!multiline) {
1328 if (*SvPVX(pm->op_pmshort) != *s ||
1329 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1330 if (pm->op_pmflags & PMf_FOLD) {
1331 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1338 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1339 SvREFCNT_dec(pm->op_pmshort);
1340 pm->op_pmshort = Nullsv; /* opt is being useless */
1343 once = !(rpm->op_pmflags & PMf_GLOBAL);
1344 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1345 c = SvPV(dstr, clen);
1346 if (clen <= rx->minlen) {
1347 /* can do inplace substitution */
1348 if (pregexec(rx, s, strend, orig, 0,
1349 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1350 if (force_on_match) {
1352 s = SvPV_force(TARG, len);
1355 if (rx->subbase) /* oops, no we can't */
1359 SvSCREAM_off(TARG); /* disable possible screamer */
1364 if (m - s > strend - d) { /* faster to shorten from end */
1366 Copy(c, m, clen, char);
1371 Move(d, m, i, char);
1375 SvCUR_set(TARG, m - s);
1376 (void)SvPOK_only(TARG);
1379 LEAVE_SCOPE(oldsave);
1383 else if (i = m - s) { /* faster from front */
1391 Copy(c, m, clen, char);
1392 (void)SvPOK_only(TARG);
1395 LEAVE_SCOPE(oldsave);
1401 Copy(c, d, clen, char);
1402 (void)SvPOK_only(TARG);
1405 LEAVE_SCOPE(oldsave);
1410 (void)SvPOK_only(TARG);
1413 LEAVE_SCOPE(oldsave);
1419 if (iters++ > maxiters)
1420 DIE("Substitution loop");
1425 Move(s, d, i, char);
1429 Copy(c, d, clen, char);
1433 } while (pregexec(rx, s, strend, orig, s == m,
1434 Nullsv, TRUE)); /* (don't match same null twice) */
1437 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1438 Move(s, d, i+1, char); /* include the Null */
1440 (void)SvPOK_only(TARG);
1442 PUSHs(sv_2mortal(newSViv((I32)iters)));
1443 LEAVE_SCOPE(oldsave);
1447 LEAVE_SCOPE(oldsave);
1453 if (pregexec(rx, s, strend, orig, 0,
1454 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1456 if (force_on_match) {
1458 s = SvPV_force(TARG, len);
1461 dstr = NEWSV(25, sv_len(TARG));
1462 sv_setpvn(dstr, m, s-m);
1465 register CONTEXT *cx;
1467 RETURNOP(cPMOP->op_pmreplroot);
1470 if (iters++ > maxiters)
1471 DIE("Substitution loop");
1472 if (rx->subbase && rx->subbase != orig) {
1477 strend = s + (strend - m);
1480 sv_catpvn(dstr, s, m-s);
1483 sv_catpvn(dstr, c, clen);
1486 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1488 sv_catpvn(dstr, s, strend - s);
1490 (void)SvOOK_off(TARG);
1491 Safefree(SvPVX(TARG));
1492 SvPVX(TARG) = SvPVX(dstr);
1493 SvCUR_set(TARG, SvCUR(dstr));
1494 SvLEN_set(TARG, SvLEN(dstr));
1498 (void)SvPOK_only(TARG);
1500 PUSHs(sv_2mortal(newSViv((I32)iters)));
1501 LEAVE_SCOPE(oldsave);
1505 LEAVE_SCOPE(oldsave);
1509 ++BmUSEFUL(pm->op_pmshort);
1511 LEAVE_SCOPE(oldsave);
1520 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1522 LEAVE; /* exit inner scope */
1525 if (stack_base + *markstack_ptr > sp) {
1528 LEAVE; /* exit outer scope */
1529 (void)POPMARK; /* pop src */
1530 items = --*markstack_ptr - markstack_ptr[-1];
1531 (void)POPMARK; /* pop dst */
1532 SP = stack_base + POPMARK; /* pop original mark */
1533 if (GIMME != G_ARRAY) {
1544 ENTER; /* enter inner scope */
1547 src = stack_base[*markstack_ptr];
1551 RETURNOP(cLOGOP->op_other);
1562 register CONTEXT *cx;
1567 if (gimme == G_SCALAR) {
1570 if (SvFLAGS(TOPs) & SVs_TEMP)
1573 *MARK = sv_mortalcopy(TOPs);
1581 for (mark = newsp + 1; mark <= SP; mark++)
1582 if (!(SvFLAGS(*mark) & SVs_TEMP))
1583 *mark = sv_mortalcopy(*mark);
1584 /* in case LEAVE wipes old return values */
1587 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1588 AV* av = cx->blk_sub.argarray;
1593 curpm = newpm; /* Don't pop $1 et al till now */
1597 return pop_return();
1606 register CONTEXT *cx;
1610 DIE("Not a CODE reference");
1611 switch (SvTYPE(sv)) {
1616 if (sv == &sv_yes) /* unfound import, ignore */
1619 DIE(no_usym, "a subroutine");
1621 if (op->op_private & HINT_STRICT_REFS)
1622 DIE(no_symref, sym, "a subroutine");
1623 cv = perl_get_cv(sym, TRUE);
1627 if (SvTYPE(cv) == SVt_PVCV)
1632 DIE("Not a CODE reference");
1637 if (!(cv = GvCV((GV*)sv)))
1638 cv = sv_2cv(sv, &stash, &gv, TRUE);
1647 DIE("Not a CODE reference");
1649 if (!CvROOT(cv) && !CvXSUB(cv)) {
1650 if (gv = CvGV(cv)) {
1653 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1655 if (SvTYPE(sv) == SVt_PVGV) {
1656 SvREFCNT_dec(GvCV((GV*)sv));
1657 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1661 tmpstr = sv_newmortal();
1662 gv_efullname(tmpstr, gv);
1663 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1664 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1666 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1670 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1672 DIE("Undefined subroutine called");
1676 if ((op->op_private & OPpDEREF_DB) && !CvXSUB(cv)) {
1679 if (SvFLAGS(cv) & (SVpcv_ANON | SVpcv_CLONED)) /* Is GV potentially non-unique? */
1680 sv_setsv(sv, newRV((SV*)cv));
1683 gv_efullname(sv,gv);
1687 DIE("No DBsub routine");
1691 if (CvOLDSTYLE(cv)) {
1692 I32 (*fp3)_((int,int,int));
1694 register I32 items = SP - MARK;
1699 stack_sp = mark + 1;
1700 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1701 items = (*fp3)(CvXSUBANY(cv).any_i32,
1702 MARK - stack_base + 1,
1704 stack_sp = stack_base + items;
1707 I32 markix = TOPMARK;
1710 (void)(*CvXSUB(cv))(cv);
1712 /* Enforce some sanity in scalar context. */
1713 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1714 if (markix > stack_sp - stack_base)
1715 *(stack_base + markix) = &sv_undef;
1717 *(stack_base + markix) = *stack_sp;
1718 stack_sp = stack_base + markix;
1726 register I32 items = SP - MARK;
1727 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1728 AV* padlist = CvPADLIST(cv);
1729 SV** svp = AvARRAY(padlist);
1730 push_return(op->op_next);
1731 PUSHBLOCK(cx, CXt_SUB, MARK);
1734 if (CvDEPTH(cv) < 2)
1735 (void)SvREFCNT_inc(cv);
1736 else { /* save temporaries on recursion? */
1737 if (CvDEPTH(cv) == 100 && dowarn)
1738 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1739 if (CvDEPTH(cv) > AvFILL(padlist)) {
1741 AV *newpad = newAV();
1742 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1743 I32 ix = AvFILL((AV*)svp[1]);
1744 svp = AvARRAY(svp[0]);
1745 for ( ;ix > 0; ix--) {
1746 if (svp[ix] != &sv_undef) {
1747 char *name = SvPVX(svp[ix]);
1748 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1749 av_store(newpad, ix,
1750 SvREFCNT_inc(oldpad[ix]) );
1752 else { /* our own lexical */
1754 av_store(newpad, ix, sv = (SV*)newAV());
1755 else if (*name == '%')
1756 av_store(newpad, ix, sv = (SV*)newHV());
1758 av_store(newpad, ix, sv = NEWSV(0,0));
1763 av_store(newpad, ix, sv = NEWSV(0,0));
1767 av = newAV(); /* will be @_ */
1769 av_store(newpad, 0, (SV*)av);
1770 AvFLAGS(av) = AVf_REIFY;
1771 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1772 AvFILL(padlist) = CvDEPTH(cv);
1773 svp = AvARRAY(padlist);
1777 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1779 AV* av = (AV*)curpad[0];
1786 cx->blk_sub.savearray = GvAV(defgv);
1787 cx->blk_sub.argarray = av;
1788 GvAV(defgv) = cx->blk_sub.argarray;
1791 if (items > AvMAX(av) + 1) {
1793 if (AvARRAY(av) != ary) {
1794 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1795 SvPVX(av) = (char*)ary;
1797 if (items > AvMAX(av) + 1) {
1798 AvMAX(av) = items - 1;
1799 Renew(ary,items,SV*);
1801 SvPVX(av) = (char*)ary;
1804 Copy(MARK,AvARRAY(av),items,SV*);
1805 AvFILL(av) = items - 1;
1813 RETURNOP(CvSTART(cv));
1823 I32 lval = op->op_flags & OPf_MOD;
1826 elem -= curcop->cop_arybase;
1827 if (SvTYPE(av) != SVt_PVAV)
1829 svp = av_fetch(av, elem, lval);
1831 if (!svp || *svp == &sv_undef)
1832 DIE(no_aelem, elem);
1833 if (op->op_private & OPpLVAL_INTRO)
1835 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV)) {
1840 (void)SvUPGRADE(sv, SVt_RV);
1841 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1842 (SV*)newHV() : (SV*)newAV());
1848 PUSHs(svp ? *svp : &sv_undef);
1861 sv = *(stack_base + TOPMARK + 1);
1873 !(packname = SvPV(sv, na)) ||
1874 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1875 !(ob=(SV*)GvIO(iogv)))
1877 char *name = SvPV(nm, na);
1879 if (!packname || !isALPHA(*packname))
1880 DIE("Can't call method \"%s\" without a package or object reference", name);
1881 if (!(stash = gv_stashpv(packname, FALSE))) {
1882 if (gv_stashpv("UNIVERSAL", FALSE))
1883 stash = gv_stashpv(packname, TRUE);
1885 DIE("Can't call method \"%s\" in empty package \"%s\"",
1888 gv = gv_fetchmethod(stash,name);
1890 DIE("Can't locate object method \"%s\" via package \"%s\"",
1895 *(stack_base + TOPMARK + 1) = iogv;
1898 if (!ob || !SvOBJECT(ob)) {
1899 char *name = SvPV(nm, na);
1900 DIE("Can't call method \"%s\" on unblessed reference", name);
1903 if (!gv) { /* nothing cached */
1904 char *name = SvPV(nm, na);
1905 gv = gv_fetchmethod(SvSTASH(ob),name);
1907 DIE("Can't locate object method \"%s\" via package \"%s\"",
1908 name, HvNAME(SvSTASH(ob)));