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"))
104 ref = (SV*)GvIOp(gv);
107 if (strEQ(elem, "GLOB"))
111 if (strEQ(elem, "HASH"))
115 if (strEQ(elem, "NAME"))
116 sv = newSVpv(GvNAME(gv), GvNAMELEN(gv));
119 if (strEQ(elem, "PACKAGE"))
120 sv = newSVpv(HvNAME(GvSTASH(gv)), 0);
123 if (strEQ(elem, "SCALAR"))
144 RETURNOP(cLOGOP->op_other);
153 if (op->op_private & OPpASSIGN_BACKWARDS) {
155 temp = left; left = right; right = temp;
157 if (tainting && tainted && (!SvGMAGICAL(left) || !SvSMAGICAL(left) ||
158 !((mg = mg_find(left, 't')) && mg->mg_len & 1)))
162 SvSetSV(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; tryAMAGICbinSET(seq,0);
193 SETs( sv_eq(left, right) ? &sv_yes : &sv_no );
200 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
207 sv_setpvn(TARG,s,len);
209 else if (SvGMAGICAL(TARG))
211 else if (!SvOK(TARG)) {
212 s = SvPV_force(TARG, len);
213 sv_setpv(TARG, ""); /* Suppress warning. */
216 sv_catpvn(TARG,s,len);
226 if (op->op_flags & OPf_MOD) {
227 if (op->op_private & OPpLVAL_INTRO)
228 SAVECLEARSV(curpad[op->op_targ]);
229 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
230 provide_ref(op, curpad[op->op_targ]);
237 last_in_gv = (GV*)(*stack_sp--);
238 return do_readline();
243 dSP; tryAMAGICbinSET(eq,0);
246 SETs((TOPn == value) ? &sv_yes : &sv_no);
256 SvFLAGS(TOPs) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK);
271 RETURNOP(cLOGOP->op_other);
277 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
280 SETn( left + right );
288 AV *av = GvAV((GV*)cSVOP->op_sv);
289 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
290 PUSHs(svp ? *svp : &sv_undef);
298 do_join(TARG, *MARK, MARK, SP);
311 /* Oversized hot code. */
315 dSP; dMARK; dORIGMARK;
320 if (op->op_flags & OPf_STACKED)
324 if (!(io = GvIO(gv))) {
326 SV* sv = sv_newmortal();
328 warn("Filehandle %s never opened", SvPV(sv,na));
331 SETERRNO(EBADF,RMS$_IFI);
334 else if (!(fp = IoOFP(io))) {
336 SV* sv = sv_newmortal();
339 warn("Filehandle %s opened only for input", SvPV(sv,na));
341 warn("print on closed filehandle %s", SvPV(sv,na));
343 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
350 if (!do_print(*MARK, fp))
354 if (fwrite1(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
363 if (!do_print(*MARK, fp))
372 if (fwrite1(ors, 1, orslen, fp) == 0 || ferror(fp))
375 if (IoFLAGS(io) & IOf_FLUSH)
376 if (Fflush(fp) == EOF)
399 if (SvTYPE(av) != SVt_PVAV)
400 DIE("Not an ARRAY reference");
401 if (op->op_private & OPpLVAL_INTRO)
402 av = (AV*)save_svref((SV**)sv);
403 if (op->op_flags & OPf_REF) {
409 if (SvTYPE(sv) == SVt_PVAV) {
411 if (op->op_flags & OPf_REF) {
417 if (SvTYPE(sv) != SVt_PVGV) {
420 if (SvGMAGICAL(sv)) {
426 if (op->op_flags & OPf_REF ||
427 op->op_private & HINT_STRICT_REFS)
428 DIE(no_usym, "an ARRAY");
429 if (GIMME == G_ARRAY)
434 if (op->op_private & HINT_STRICT_REFS)
435 DIE(no_symref, sym, "an ARRAY");
436 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
439 if (op->op_private & OPpLVAL_INTRO)
441 if (op->op_flags & OPf_REF) {
448 if (GIMME == G_ARRAY) {
449 I32 maxarg = AvFILL(av) + 1;
451 Copy(AvARRAY(av), SP+1, maxarg, SV*);
456 I32 maxarg = AvFILL(av) + 1;
472 if (SvTYPE(hv) != SVt_PVHV)
473 DIE("Not a HASH reference");
474 if (op->op_private & OPpLVAL_INTRO)
475 hv = (HV*)save_svref((SV**)sv);
476 if (op->op_flags & OPf_REF) {
482 if (SvTYPE(sv) == SVt_PVHV) {
484 if (op->op_flags & OPf_REF) {
490 if (SvTYPE(sv) != SVt_PVGV) {
493 if (SvGMAGICAL(sv)) {
499 if (op->op_flags & OPf_REF ||
500 op->op_private & HINT_STRICT_REFS)
501 DIE(no_usym, "a HASH");
502 if (GIMME == G_ARRAY) {
509 if (op->op_private & HINT_STRICT_REFS)
510 DIE(no_symref, sym, "a HASH");
511 sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
514 if (op->op_private & OPpLVAL_INTRO)
516 if (op->op_flags & OPf_REF) {
523 if (GIMME == G_ARRAY) { /* array wanted */
530 sprintf(buf, "%d/%d", HvFILL(hv), HvMAX(hv)+1);
543 SV **lastlelem = stack_sp;
544 SV **lastrelem = stack_base + POPMARK;
545 SV **firstrelem = stack_base + POPMARK + 1;
546 SV **firstlelem = lastrelem + 1;
558 delaymagic = DM_DELAY; /* catch simultaneous items */
560 /* If there's a common identifier on both sides we have to take
561 * special care that assigning the identifier on the left doesn't
562 * clobber a value on the right that's used later in the list.
564 if (op->op_private & OPpASSIGN_COMMON) {
565 for (relem = firstrelem; relem <= lastrelem; relem++) {
568 *relem = sv_mortalcopy(sv);
576 while (lelem <= lastlelem) {
577 tainted = 0; /* Each item stands on its own, taintwise. */
579 switch (SvTYPE(sv)) {
582 magic = SvMAGICAL(ary) != 0;
586 while (relem <= lastrelem) { /* gobble up all the rest */
591 (void)av_store(ary,i++,sv);
602 magic = SvMAGICAL(hash) != 0;
605 while (relem < lastrelem) { /* gobble up all the rest */
610 sv = &sv_no, relem++;
611 tmps = SvPV(sv, len);
612 tmpstr = NEWSV(29,0);
614 sv_setsv(tmpstr,*relem); /* value */
616 (void)hv_store(hash,tmps,len,tmpstr,0);
624 if (SvTHINKFIRST(sv)) {
625 if (SvREADONLY(sv) && curcop != &compiling) {
626 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
628 if (relem <= lastrelem)
635 if (relem <= lastrelem) {
636 sv_setsv(sv, *relem);
640 sv_setsv(sv, &sv_undef);
645 if (delaymagic & ~DM_DELAY) {
646 if (delaymagic & DM_UID) {
648 (void)setresuid(uid,euid,(Uid_t)-1);
651 (void)setreuid(uid,euid);
654 if ((delaymagic & DM_UID) == DM_RUID) {
656 delaymagic &= ~DM_RUID;
658 # endif /* HAS_SETRUID */
660 if ((delaymagic & DM_UID) == DM_EUID) {
662 delaymagic &= ~DM_EUID;
664 # endif /* HAS_SETEUID */
665 if (delaymagic & DM_UID) {
667 DIE("No setreuid available");
670 # endif /* HAS_SETREUID */
671 #endif /* HAS_SETRESUID */
673 euid = (int)geteuid();
675 if (delaymagic & DM_GID) {
677 (void)setresgid(gid,egid,(Gid_t)-1);
680 (void)setregid(gid,egid);
683 if ((delaymagic & DM_GID) == DM_RGID) {
685 delaymagic &= ~DM_RGID;
687 # endif /* HAS_SETRGID */
689 if ((delaymagic & DM_GID) == DM_EGID) {
691 delaymagic &= ~DM_EGID;
693 # endif /* HAS_SETEGID */
694 if (delaymagic & DM_GID) {
696 DIE("No setregid available");
699 # endif /* HAS_SETREGID */
700 #endif /* HAS_SETRESGID */
702 egid = (int)getegid();
704 tainting |= (uid && (euid != uid || egid != gid));
707 if (GIMME == G_ARRAY) {
711 SP = firstrelem + (lastlelem - firstlelem);
718 SETi(lastrelem - firstrelem + 1);
726 register PMOP *pm = cPMOP;
733 register REGEXP *rx = pm->op_pmregexp;
737 I32 oldsave = savestack_ix;
739 if (op->op_flags & OPf_STACKED)
748 DIE("panic: do_match");
750 if (pm->op_pmflags & PMf_USED) {
751 if (gimme == G_ARRAY)
756 if (!rx->prelen && curpm) {
758 rx = pm->op_pmregexp;
761 if (global = pm->op_pmflags & PMf_GLOBAL) {
763 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
764 MAGIC* mg = mg_find(TARG, 'g');
765 if (mg && mg->mg_len >= 0) {
766 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
767 minmatch = (mg->mg_flags & MGf_MINMATCH);
771 if (!rx->nparens && !global)
772 gimme = G_SCALAR; /* accidental array context? */
773 safebase = (gimme == G_ARRAY) || global;
774 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
776 multiline = pm->op_pmflags & PMf_MULTILINE;
780 if (global && rx->startp[0]) {
784 minmatch = (s == rx->startp[0]);
786 if (pm->op_pmshort) {
787 if (pm->op_pmflags & PMf_SCANFIRST) {
788 if (SvSCREAM(TARG)) {
789 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
791 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
793 else if (pm->op_pmflags & PMf_ALL)
796 else if (!(s = fbm_instr((unsigned char*)s,
797 (unsigned char*)strend, pm->op_pmshort)))
799 else if (pm->op_pmflags & PMf_ALL)
801 if (s && rx->regback >= 0) {
802 ++BmUSEFUL(pm->op_pmshort);
810 else if (!multiline) {
811 if (*SvPVX(pm->op_pmshort) != *s ||
812 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
813 if (pm->op_pmflags & PMf_FOLD) {
814 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
821 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
822 SvREFCNT_dec(pm->op_pmshort);
823 pm->op_pmshort = Nullsv; /* opt is being useless */
826 if (pregexec(rx, s, strend, truebase, minmatch,
827 SvSCREAM(TARG) ? TARG : Nullsv,
830 if (pm->op_pmflags & PMf_ONCE)
831 pm->op_pmflags |= PMf_USED;
839 if (gimme == G_ARRAY) {
843 if (global && !iters)
847 EXTEND(SP, iters + i);
848 for (i = !i; i <= iters; i++) {
849 PUSHs(sv_newmortal());
851 if ((s = rx->startp[i]) && rx->endp[i] ) {
852 len = rx->endp[i] - s;
853 sv_setpvn(*SP, s, len);
857 truebase = rx->subbeg;
858 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
862 LEAVE_SCOPE(oldsave);
868 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
869 mg = mg_find(TARG, 'g');
871 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
872 mg = mg_find(TARG, 'g');
875 mg->mg_len = rx->endp[0] - truebase;
876 if (rx->startp[0] == rx->endp[0])
877 mg->mg_flags |= MGf_MINMATCH;
879 mg->mg_flags &= ~MGf_MINMATCH;
884 LEAVE_SCOPE(oldsave);
889 ++BmUSEFUL(pm->op_pmshort);
891 if (pm->op_pmflags & PMf_ONCE)
892 pm->op_pmflags |= PMf_USED;
894 rx->subbeg = truebase;
897 rx->endp[0] = s + SvCUR(pm->op_pmshort);
904 Safefree(rx->subbase);
905 tmps = rx->subbase = savepvn(t, strend-t);
907 rx->subend = tmps + (strend-t);
908 tmps = rx->startp[0] = tmps + (s - t);
909 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
911 LEAVE_SCOPE(oldsave);
916 ++BmUSEFUL(pm->op_pmshort);
920 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
921 MAGIC* mg = mg_find(TARG, 'g');
926 LEAVE_SCOPE(oldsave);
927 if (gimme == G_ARRAY)
940 register IO *io = GvIO(last_in_gv);
941 register I32 type = op->op_type;
947 if (IoFLAGS(io) & IOf_ARGV) {
948 if (IoFLAGS(io) & IOf_START) {
949 IoFLAGS(io) &= ~IOf_START;
951 if (av_len(GvAVn(last_in_gv)) < 0) {
952 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
953 av_push(GvAVn(last_in_gv), tmpstr);
956 fp = nextargv(last_in_gv);
957 if (!fp) { /* Note: fp != IoIFP(io) */
958 (void)do_close(last_in_gv, FALSE); /* now it does*/
959 IoFLAGS(io) |= IOf_START;
962 else if (type == OP_GLOB) {
963 SV *tmpcmd = NEWSV(55, 0);
967 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
968 /* since spawning off a process is a real performance hit */
971 #include <lib$routines.h>
974 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
975 char vmsspec[NAM$C_MAXRSS+1];
976 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
977 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
978 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
981 struct dsc$descriptor_s wilddsc
982 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
983 struct dsc$descriptor_vs rsdsc
984 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
985 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
987 /* We could find out if there's an explicit dev/dir or version
988 by peeking into lib$find_file's internal context at
989 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
990 but that's unsupported, so I don't want to do it now and
991 have it bite someone in the future. */
992 strcat(tmpfnam,tmpnam(NULL));
993 cp = SvPV(tmpglob,i);
995 if (cp[i] == ';') hasver = 1;
1001 hasdir = isunix = 1;
1004 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1009 if ((tmpfp = fopen(tmpfnam,"w+","fop=dlt")) != NULL) {
1010 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1011 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1012 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1013 &dfltdsc,NULL,NULL,NULL))&1)) {
1014 end = rstr + (unsigned long int) *rslt;
1015 if (!hasver) while (*end != ';') end--;
1016 *(end++) = '\n'; *end = '\0';
1017 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1019 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob));
1024 while (*(--begin) != ']' && *begin != '>') ;
1027 ok = (fputs(begin,tmpfp) != EOF);
1029 if (cxt) (void)lib$find_file_end(&cxt);
1030 if (ok && sts != RMS$_NMF &&
1031 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
1034 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1042 IoIFP(io) = fp = tmpfp;
1048 sv_setpv(tmpcmd, "perlglob ");
1049 sv_catsv(tmpcmd, tmpglob);
1050 sv_catpv(tmpcmd, " |");
1053 sv_setpvn(tmpcmd, cshname, cshlen);
1054 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1055 sv_catsv(tmpcmd, tmpglob);
1056 sv_catpv(tmpcmd, "' 2>/dev/null |");
1058 sv_setpv(tmpcmd, "echo ");
1059 sv_catsv(tmpcmd, tmpglob);
1061 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1063 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1067 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1068 FALSE, 0, 0, Nullfp);
1074 else if (type == OP_GLOB)
1078 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
1079 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
1080 if (GIMME == G_SCALAR) {
1081 (void)SvOK_off(TARG);
1086 if (GIMME == G_ARRAY) {
1087 sv = sv_2mortal(NEWSV(57, 80));
1092 (void)SvUPGRADE(sv, SVt_PV);
1093 tmplen = SvLEN(sv); /* remember if already alloced */
1095 Sv_Grow(sv, 80); /* try short-buffering it */
1096 if (type == OP_RCATLINE)
1102 if (!sv_gets(sv, fp, offset)) {
1104 if (IoFLAGS(io) & IOf_ARGV) {
1105 fp = nextargv(last_in_gv);
1108 (void)do_close(last_in_gv, FALSE);
1109 IoFLAGS(io) |= IOf_START;
1111 else if (type == OP_GLOB) {
1112 (void)do_close(last_in_gv, FALSE);
1114 if (GIMME == G_SCALAR) {
1115 (void)SvOK_off(TARG);
1124 SvTAINT(sv); /* Anything from the outside world...*/
1126 if (type == OP_GLOB) {
1129 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1130 tmps = SvEND(sv) - 1;
1131 if (*tmps == *SvPVX(rs)) {
1136 for (tmps = SvPVX(sv); *tmps; tmps++)
1137 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1138 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1140 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1141 (void)POPs; /* Unmatched wildcard? Chuck it... */
1145 if (GIMME == G_ARRAY) {
1146 if (SvLEN(sv) - SvCUR(sv) > 20) {
1147 SvLEN_set(sv, SvCUR(sv)+1);
1148 Renew(SvPVX(sv), SvLEN(sv), char);
1150 sv = sv_2mortal(NEWSV(58, 80));
1153 else if (!tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1154 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1158 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1159 Renew(SvPVX(sv), SvLEN(sv), char);
1168 register CONTEXT *cx;
1172 * We don't just use the GIMME macro here because it assumes there's
1173 * already a context, which ain't necessarily so at initial startup.
1176 if (op->op_flags & OPf_KNOW)
1177 gimme = op->op_flags & OPf_LIST;
1178 else if (cxstack_ix >= 0)
1179 gimme = cxstack[cxstack_ix].blk_gimme;
1186 PUSHBLOCK(cx, CXt_BLOCK, sp);
1197 char *key = SvPV(keysv, keylen);
1199 I32 lval = op->op_flags & OPf_MOD;
1201 if (SvTYPE(hv) != SVt_PVHV)
1203 svp = hv_fetch(hv, key, keylen, lval);
1205 if (!svp || *svp == &sv_undef)
1207 if (op->op_private & OPpLVAL_INTRO)
1209 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1210 provide_ref(op, *svp);
1212 PUSHs(svp ? *svp : &sv_undef);
1219 register CONTEXT *cx;
1225 if (op->op_flags & OPf_SPECIAL) {
1226 cx = &cxstack[cxstack_ix];
1227 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1232 if (op->op_flags & OPf_KNOW)
1233 gimme = op->op_flags & OPf_LIST;
1234 else if (cxstack_ix >= 0)
1235 gimme = cxstack[cxstack_ix].blk_gimme;
1239 if (gimme == G_SCALAR) {
1240 if (op->op_private & OPpLEAVE_VOID)
1245 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1248 *MARK = sv_mortalcopy(TOPs);
1257 for (mark = newsp + 1; mark <= SP; mark++)
1258 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1259 *mark = sv_mortalcopy(*mark);
1260 /* in case LEAVE wipes old return values */
1262 curpm = newpm; /* Don't pop $1 et al till now */
1272 register CONTEXT *cx;
1277 cx = &cxstack[cxstack_ix];
1278 if (cx->cx_type != CXt_LOOP)
1279 DIE("panic: pp_iter");
1280 av = cx->blk_loop.iterary;
1281 if (av == stack && cx->blk_loop.iterix >= cx->blk_oldsp)
1284 if (cx->blk_loop.iterix >= AvFILL(av))
1287 if (sv = AvARRAY(av)[++cx->blk_loop.iterix]) {
1289 *cx->blk_loop.itervar = sv;
1292 *cx->blk_loop.itervar = &sv_undef;
1300 register PMOP *pm = cPMOP;
1315 register REGEXP *rx = pm->op_pmregexp;
1317 int force_on_match = 0;
1318 I32 oldsave = savestack_ix;
1320 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1322 if (op->op_flags & OPf_STACKED)
1328 s = SvPV(TARG, len);
1329 if (!SvPOKp(TARG) || SvREADONLY(TARG) || (SvTYPE(TARG) == SVt_PVGV))
1334 DIE("panic: do_subst");
1337 maxiters = (strend - s) + 10;
1339 if (!rx->prelen && curpm) {
1341 rx = pm->op_pmregexp;
1343 safebase = ((!rx || !rx->nparens) && !sawampersand);
1344 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1346 multiline = pm->op_pmflags & PMf_MULTILINE;
1349 if (pm->op_pmshort) {
1350 if (pm->op_pmflags & PMf_SCANFIRST) {
1351 if (SvSCREAM(TARG)) {
1352 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1354 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1357 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1360 if (s && rx->regback >= 0) {
1361 ++BmUSEFUL(pm->op_pmshort);
1369 else if (!multiline) {
1370 if (*SvPVX(pm->op_pmshort) != *s ||
1371 bcmp(SvPVX(pm->op_pmshort), s, pm->op_pmslen) ) {
1372 if (pm->op_pmflags & PMf_FOLD) {
1373 if (ibcmp((U8*)SvPVX(pm->op_pmshort), (U8*)s, pm->op_pmslen) )
1380 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1381 SvREFCNT_dec(pm->op_pmshort);
1382 pm->op_pmshort = Nullsv; /* opt is being useless */
1385 once = !(rpm->op_pmflags & PMf_GLOBAL);
1386 if (rpm->op_pmflags & PMf_CONST) { /* known replacement string? */
1387 c = SvPV(dstr, clen);
1388 if (clen <= rx->minlen) {
1389 /* can do inplace substitution */
1390 if (pregexec(rx, s, strend, orig, 0,
1391 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1392 if (force_on_match) {
1394 s = SvPV_force(TARG, len);
1397 if (rx->subbase) /* oops, no we can't */
1401 SvSCREAM_off(TARG); /* disable possible screamer */
1406 if (m - s > strend - d) { /* faster to shorten from end */
1408 Copy(c, m, clen, char);
1413 Move(d, m, i, char);
1417 SvCUR_set(TARG, m - s);
1418 (void)SvPOK_only(TARG);
1421 LEAVE_SCOPE(oldsave);
1425 else if (i = m - s) { /* faster from front */
1433 Copy(c, m, clen, char);
1434 (void)SvPOK_only(TARG);
1437 LEAVE_SCOPE(oldsave);
1443 Copy(c, d, clen, char);
1444 (void)SvPOK_only(TARG);
1447 LEAVE_SCOPE(oldsave);
1452 (void)SvPOK_only(TARG);
1455 LEAVE_SCOPE(oldsave);
1461 if (iters++ > maxiters)
1462 DIE("Substitution loop");
1467 Move(s, d, i, char);
1471 Copy(c, d, clen, char);
1475 } while (pregexec(rx, s, strend, orig, s == m,
1476 Nullsv, TRUE)); /* (don't match same null twice) */
1479 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1480 Move(s, d, i+1, char); /* include the Null */
1482 (void)SvPOK_only(TARG);
1484 PUSHs(sv_2mortal(newSViv((I32)iters)));
1485 LEAVE_SCOPE(oldsave);
1489 LEAVE_SCOPE(oldsave);
1495 if (pregexec(rx, s, strend, orig, 0,
1496 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1498 if (force_on_match) {
1500 s = SvPV_force(TARG, len);
1503 dstr = NEWSV(25, sv_len(TARG));
1504 sv_setpvn(dstr, m, s-m);
1507 register CONTEXT *cx;
1509 RETURNOP(cPMOP->op_pmreplroot);
1512 if (iters++ > maxiters)
1513 DIE("Substitution loop");
1514 if (rx->subbase && rx->subbase != orig) {
1519 strend = s + (strend - m);
1522 sv_catpvn(dstr, s, m-s);
1525 sv_catpvn(dstr, c, clen);
1528 } while (pregexec(rx, s, strend, orig, s == m, Nullsv,
1530 sv_catpvn(dstr, s, strend - s);
1532 (void)SvOOK_off(TARG);
1533 Safefree(SvPVX(TARG));
1534 SvPVX(TARG) = SvPVX(dstr);
1535 SvCUR_set(TARG, SvCUR(dstr));
1536 SvLEN_set(TARG, SvLEN(dstr));
1540 (void)SvPOK_only(TARG);
1542 PUSHs(sv_2mortal(newSViv((I32)iters)));
1543 LEAVE_SCOPE(oldsave);
1547 LEAVE_SCOPE(oldsave);
1551 ++BmUSEFUL(pm->op_pmshort);
1553 LEAVE_SCOPE(oldsave);
1562 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1564 LEAVE; /* exit inner scope */
1567 if (stack_base + *markstack_ptr > sp) {
1570 LEAVE; /* exit outer scope */
1571 (void)POPMARK; /* pop src */
1572 items = --*markstack_ptr - markstack_ptr[-1];
1573 (void)POPMARK; /* pop dst */
1574 SP = stack_base + POPMARK; /* pop original mark */
1575 if (GIMME != G_ARRAY) {
1586 ENTER; /* enter inner scope */
1589 src = stack_base[*markstack_ptr];
1593 RETURNOP(cLOGOP->op_other);
1604 register CONTEXT *cx;
1609 if (gimme == G_SCALAR) {
1612 if (SvFLAGS(TOPs) & SVs_TEMP)
1615 *MARK = sv_mortalcopy(TOPs);
1623 for (mark = newsp + 1; mark <= SP; mark++)
1624 if (!(SvFLAGS(*mark) & SVs_TEMP))
1625 *mark = sv_mortalcopy(*mark);
1626 /* in case LEAVE wipes old return values */
1629 if (cx->blk_sub.hasargs) { /* You don't exist; go away. */
1630 AV* av = cx->blk_sub.argarray;
1635 curpm = newpm; /* Don't pop $1 et al till now */
1639 return pop_return();
1648 register CONTEXT *cx;
1652 DIE("Not a CODE reference");
1653 switch (SvTYPE(sv)) {
1658 if (sv == &sv_yes) /* unfound import, ignore */
1661 DIE(no_usym, "a subroutine");
1663 if (op->op_private & HINT_STRICT_REFS)
1664 DIE(no_symref, sym, "a subroutine");
1665 cv = perl_get_cv(sym, TRUE);
1669 if (SvTYPE(cv) == SVt_PVCV)
1674 DIE("Not a CODE reference");
1679 if (!(cv = GvCV((GV*)sv)))
1680 cv = sv_2cv(sv, &stash, &gv, TRUE);
1689 DIE("Not a CODE reference");
1691 if (!CvROOT(cv) && !CvXSUB(cv)) {
1692 if (gv = CvGV(cv)) {
1695 if (SvFAKE(cv) && GvCV(gv) != cv) { /* autoloaded stub? */
1697 if (SvTYPE(sv) == SVt_PVGV) {
1698 SvREFCNT_dec(GvCV((GV*)sv));
1699 GvCV((GV*)sv) = (CV*)SvREFCNT_inc((SV*)cv);
1703 tmpstr = sv_newmortal();
1704 gv_efullname(tmpstr, gv);
1705 ngv = gv_fetchmethod(GvESTASH(gv), "AUTOLOAD");
1706 if (ngv && ngv != gv && (cv = GvCV(ngv))) { /* One more chance... */
1708 sv_setsv(GvSV(CvGV(cv)), tmpstr); /* Set CV's $AUTOLOAD */
1710 sv_unmagic(GvSV(CvGV(cv)), 't');
1714 DIE("Undefined subroutine &%s called",SvPVX(tmpstr));
1716 DIE("Undefined subroutine called");
1720 if ((op->op_private & OPpENTERSUB_DB) && !CvXSUB(cv)) {
1723 if (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)) {
1724 /* GV is potentially non-unique */
1725 sv_setsv(sv, newRV((SV*)cv));
1729 gv_efullname(sv,gv);
1733 DIE("No DBsub routine");
1737 if (CvOLDSTYLE(cv)) {
1738 I32 (*fp3)_((int,int,int));
1740 register I32 items = SP - MARK;
1745 stack_sp = mark + 1;
1746 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1747 items = (*fp3)(CvXSUBANY(cv).any_i32,
1748 MARK - stack_base + 1,
1750 stack_sp = stack_base + items;
1753 I32 markix = TOPMARK;
1756 (void)(*CvXSUB(cv))(cv);
1758 /* Enforce some sanity in scalar context. */
1759 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
1760 if (markix > stack_sp - stack_base)
1761 *(stack_base + markix) = &sv_undef;
1763 *(stack_base + markix) = *stack_sp;
1764 stack_sp = stack_base + markix;
1772 register I32 items = SP - MARK;
1773 I32 hasargs = (op->op_flags & OPf_STACKED) != 0;
1774 AV* padlist = CvPADLIST(cv);
1775 SV** svp = AvARRAY(padlist);
1776 push_return(op->op_next);
1777 PUSHBLOCK(cx, CXt_SUB, MARK);
1780 if (CvDEPTH(cv) < 2)
1781 (void)SvREFCNT_inc(cv);
1782 else { /* save temporaries on recursion? */
1783 if (CvDEPTH(cv) == 100 && dowarn)
1784 warn("Deep recursion on subroutine \"%s\"",GvENAME(CvGV(cv)));
1785 if (CvDEPTH(cv) > AvFILL(padlist)) {
1787 AV *newpad = newAV();
1788 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
1789 I32 ix = AvFILL((AV*)svp[1]);
1790 svp = AvARRAY(svp[0]);
1791 for ( ;ix > 0; ix--) {
1792 if (svp[ix] != &sv_undef) {
1793 char *name = SvPVX(svp[ix]);
1794 if (SvFLAGS(svp[ix]) & SVf_FAKE) { /* outer lexical? */
1795 av_store(newpad, ix,
1796 SvREFCNT_inc(oldpad[ix]) );
1798 else { /* our own lexical */
1800 av_store(newpad, ix, sv = (SV*)newAV());
1801 else if (*name == '%')
1802 av_store(newpad, ix, sv = (SV*)newHV());
1804 av_store(newpad, ix, sv = NEWSV(0,0));
1809 av_store(newpad, ix, sv = NEWSV(0,0));
1813 av = newAV(); /* will be @_ */
1815 av_store(newpad, 0, (SV*)av);
1816 AvFLAGS(av) = AVf_REIFY;
1817 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1818 AvFILL(padlist) = CvDEPTH(cv);
1819 svp = AvARRAY(padlist);
1823 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1825 AV* av = (AV*)curpad[0];
1832 cx->blk_sub.savearray = GvAV(defgv);
1833 cx->blk_sub.argarray = av;
1834 GvAV(defgv) = cx->blk_sub.argarray;
1837 if (items > AvMAX(av) + 1) {
1839 if (AvARRAY(av) != ary) {
1840 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1841 SvPVX(av) = (char*)ary;
1843 if (items > AvMAX(av) + 1) {
1844 AvMAX(av) = items - 1;
1845 Renew(ary,items,SV*);
1847 SvPVX(av) = (char*)ary;
1850 Copy(MARK,AvARRAY(av),items,SV*);
1851 AvFILL(av) = items - 1;
1859 RETURNOP(CvSTART(cv));
1869 I32 lval = op->op_flags & OPf_MOD;
1872 elem -= curcop->cop_arybase;
1873 if (SvTYPE(av) != SVt_PVAV)
1875 svp = av_fetch(av, elem, lval);
1877 if (!svp || *svp == &sv_undef)
1878 DIE(no_aelem, elem);
1879 if (op->op_private & OPpLVAL_INTRO)
1881 else if (op->op_private & (OPpDEREF_HV|OPpDEREF_AV))
1882 provide_ref(op, *svp);
1884 PUSHs(svp ? *svp : &sv_undef);
1898 (void)SvUPGRADE(sv, SVt_RV);
1899 SvRV(sv) = (op->op_private & OPpDEREF_HV ?
1900 (SV*)newHV() : (SV*)newAV());
1915 sv = *(stack_base + TOPMARK + 1);
1927 !(packname = SvPV(sv, na)) ||
1928 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
1929 !(ob=(SV*)GvIO(iogv)))
1931 char *name = SvPV(nm, na);
1933 if (!packname || !isALPHA(*packname))
1934 DIE("Can't call method \"%s\" without a package or object reference", name);
1935 if (!(stash = gv_stashpv(packname, FALSE))) {
1936 if (gv_stashpv("UNIVERSAL", FALSE))
1937 stash = gv_stashpv(packname, TRUE);
1939 DIE("Can't call method \"%s\" in empty package \"%s\"",
1942 gv = gv_fetchmethod(stash,name);
1944 DIE("Can't locate object method \"%s\" via package \"%s\"",
1949 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV(iogv));
1952 if (!ob || !SvOBJECT(ob)) {
1953 char *name = SvPV(nm, na);
1954 DIE("Can't call method \"%s\" on unblessed reference", name);
1957 if (!gv) { /* nothing cached */
1958 char *name = SvPV(nm, na);
1959 gv = gv_fetchmethod(SvSTASH(ob),name);
1961 DIE("Can't locate object method \"%s\" via package \"%s\"",
1962 name, HvNAME(SvSTASH(ob)));