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 * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
12 * of your inquisitiveness, I shall spend all the rest of my days answering
13 * you. What more do you want to know?'
14 * 'The names of all the stars, and of all living things, and the whole
15 * history of Middle-earth and Over-heaven and of the Sundering Seas,'
28 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
29 croak("Bad symbol for array");
39 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
40 croak("Bad symbol for hash");
50 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
51 croak("Bad symbol for filehandle");
65 sprintf(tmpbuf, "_<%s", name);
66 tmplen = strlen(tmpbuf);
67 gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE);
69 gv_init(gv, defstash, tmpbuf, tmplen, FALSE);
70 sv_setpv(GvSV(gv), name);
71 if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm")))
74 hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
79 gv_init(gv, stash, name, len, multi)
88 sv_upgrade((SV*)gv, SVt_PVGV);
92 GvGP(gv) = gp_ref(gp);
94 GvSV(gv) = NEWSV(72,0);
95 GvLINE(gv) = curcop->cop_line;
96 GvFILEGV(gv) = curcop->cop_filegv;
98 sv_magic((SV*)gv, (SV*)gv, '*', name, len);
100 GvNAME(gv) = savepvn(name, len);
107 gv_init_sv(gv, sv_type)
125 gv_fetchmeth(stash, name, len, level)
140 if ((level > 100) || (level < -100))
141 croak("Recursive inheritance detected");
143 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
145 DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
146 if (!gvp) goto recurse;
149 if (SvTYPE(topgv) != SVt_PVGV)
150 gv_init(topgv, stash, name, len, TRUE);
152 if (cv = GvCV(topgv)) {
153 if (CvXSUB(cv) || CvROOT(cv) || CvGV(cv)) { /* Not deleted, possibly autoloaded. */
154 if (GvCVGEN(topgv) >= sub_generation)
155 return topgv; /* valid cached inheritance */
156 if (!GvCVGEN(topgv)) { /* not an inheritance cache */
160 /* stale cached entry, just junk it */
162 GvCV(topgv) = cv = 0;
165 /* Now cv = 0, and there is no cv in topgv. */
168 gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
169 if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
170 SV** svp = AvARRAY(av);
171 I32 items = AvFILL(av) + 1;
174 HV* basestash = gv_stashsv(sv, FALSE);
177 warn("Can't locate package %s for @%s::ISA",
178 SvPVX(sv), HvNAME(stash));
181 gv = gv_fetchmeth(basestash, name, len, level + (level >= 0 ? 1 : -1));
183 GvCV(topgv) = GvCV(gv); /* cache the CV */
184 GvCVGEN(topgv) = sub_generation; /* valid for now */
185 SvREFCNT_inc(GvCV(gv));
187 } else if (gv) return gv;
191 if ((level == 0) || (level == -1)) { /* topgv is present. */
192 if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
193 if (gv = gv_fetchmeth(lastchance, name, len, level + (level >= 0 ? 1 : -1))) {
194 GvCV(topgv) = GvCV(gv); /* cache the CV */
195 GvCVGEN(topgv) = sub_generation; /* valid for now */
196 SvREFCNT_inc(GvCV(gv));
206 gv_fetchmethod(stash, name)
214 for (nend = name; *nend; nend++) {
215 if (*nend == ':' || *nend == '\'')
220 char *origname = name;
226 if (strEQ(origname,"SUPER")) {
227 /* Degenerate case ->SUPER::method should really lookup in original stash */
228 SV *tmpstr = sv_2mortal(newSVpv(HvNAME(curcop->cop_stash),0));
229 sv_catpvn(tmpstr, "::SUPER", 7);
230 stash = gv_stashpvn(SvPVX(tmpstr),SvCUR(tmpstr),TRUE);
232 DEBUG_o( deb("Treating %s as %s::%s\n",origname,HvNAME(stash),name) );
234 stash = gv_stashpvn(origname, nsplit - origname, TRUE);
238 gv = gv_fetchmeth(stash, name, nend - name, 0);
241 /* Failed obvious case - look for SUPER as last element of stash's name */
242 char *packname = HvNAME(stash);
243 STRLEN len = strlen(packname);
244 if (len >= 7 && strEQ(packname+len-7,"::SUPER")) {
245 /* Now look for @.*::SUPER::ISA */
246 GV** gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
248 if (!gvp || (gv = *gvp) == (GV*)&sv_undef || !GvAV(gv)) {
249 /* No @ISA in package ending in ::SUPER - drop suffix
250 and see if there is an @ISA there
253 char ch = packname[len];
255 packname[len] = '\0';
256 basestash = gv_stashpvn(packname, len, TRUE);
258 gvp = (GV**)hv_fetch(basestash,"ISA",3,FALSE);
259 if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
260 /* Okay found @ISA after dropping the SUPER, alias it */
261 SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0));
262 sv_catpvn(tmpstr, "::ISA", 5);
263 gv = gv_fetchpv(SvPV(tmpstr,na),TRUE,SVt_PVGV);
265 GvAV(gv) = (AV*)SvREFCNT_inc(av);
266 /* ... and re-try lookup */
267 gv = gv_fetchmeth(stash, name, nend - name, 0);
269 croak("Cannot create %s::ISA",HvNAME(stash));
279 if (strEQ(name,"import"))
281 else if (strNE(name, "AUTOLOAD")) {
282 if (gv = gv_fetchmeth(stash, "AUTOLOAD", 8, 0)) {
283 /* One more chance... */
284 SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0));
285 sv_catpvn(tmpstr,"::", 2);
286 sv_catpvn(tmpstr, name, nend - name);
288 sv_setsv(GvSV(CvGV(cv)), tmpstr);
289 SvTAINTED_off(GvSV(CvGV(cv)));
297 gv_stashpv(name,create)
301 return gv_stashpvn(name, strlen(name), create);
305 gv_stashpvn(name,namelen,create)
314 if (namelen > 1200) {
317 warn("Weird package name \"%s\" truncated", name);
319 warn("Weird package name \"%.*s...\" truncated", namelen, name);
322 Copy(name,tmpbuf,namelen,char);
323 tmpbuf[namelen++] = ':';
324 tmpbuf[namelen++] = ':';
325 tmpbuf[namelen] = '\0';
326 tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV);
330 GvHV(tmpgv) = newHV();
333 HvNAME(stash) = savepv(name);
338 gv_stashsv(sv,create)
345 return gv_stashpvn(ptr, len, create);
350 gv_fetchpv(nambeg,add,sv_type)
355 register char *name = nambeg;
359 register char *namend;
364 if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
367 for (namend = name; *namend; namend++) {
368 if ((*namend == '\'' && namend[1]) ||
369 (*namend == ':' && namend[1] == ':'))
373 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
378 New(601, tmpbuf, len+3, char);
379 Copy(name, tmpbuf, len, char);
383 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
385 if (!gvp || *gvp == (GV*)&sv_undef)
389 if (SvTYPE(gv) == SVt_PVGV)
394 gv_init(gv, stash, nambeg, namend - nambeg, (add & 2));
396 if (!(stash = GvHV(gv)))
397 stash = GvHV(gv) = newHV();
400 HvNAME(stash) = savepvn(nambeg, namend - nambeg);
408 return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE);
415 /* No stash in name, so see how we can default */
418 if (isIDFIRST(*name)) {
419 if (isUPPER(*name)) {
421 if (*name == 'S' && (
422 strEQ(name, "SIG") ||
423 strEQ(name, "STDIN") ||
424 strEQ(name, "STDOUT") ||
425 strEQ(name, "STDERR") ))
428 else if (*name > 'E') {
429 if (*name == 'I' && strEQ(name, "INC"))
432 else if (*name > 'A') {
433 if (*name == 'E' && strEQ(name, "ENV"))
436 else if (*name == 'A' && (
437 strEQ(name, "ARGV") ||
438 strEQ(name, "ARGVOUT") ))
441 else if (*name == '_' && !name[1])
445 else if ((COP*)curcop == &compiling) {
447 if (add && (hints & HINT_STRICT_VARS) &&
448 sv_type != SVt_PVCV &&
449 sv_type != SVt_PVGV &&
450 sv_type != SVt_PVFM &&
451 sv_type != SVt_PVIO &&
452 !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
454 gvp = (GV**)hv_fetch(stash,name,len,0);
456 *gvp == (GV*)&sv_undef ||
457 SvTYPE(*gvp) != SVt_PVGV)
461 else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) ||
462 sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) ||
463 sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) )
465 warn("Variable \"%c%s\" is not imported",
466 sv_type == SVt_PVAV ? '@' :
467 sv_type == SVt_PVHV ? '%' : '$',
470 warn("(Did you mean &%s instead?)\n", name);
476 stash = curcop->cop_stash;
482 /* By this point we should have a stash and a name */
486 warn("Global symbol \"%s\" requires explicit package name", name);
488 stash = curstash ? curstash : defstash; /* avoid core dumps */
494 if (!SvREFCNT(stash)) /* symbol table under destruction */
497 gvp = (GV**)hv_fetch(stash,name,len,add);
498 if (!gvp || *gvp == (GV*)&sv_undef)
501 if (SvTYPE(gv) == SVt_PVGV) {
504 gv_init_sv(gv, sv_type);
509 /* Adding a new symbol */
512 warn("Had to create %s unexpectedly", nambeg);
513 gv_init(gv, stash, name, len, add & 2);
514 gv_init_sv(gv, sv_type);
516 /* set up magic where warranted */
519 if (strEQ(name, "ARGV")) {
520 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
530 if (strnEQ(name, "EXPORT", 6))
534 if (strEQ(name, "ISA")) {
537 sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
538 if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1)
541 av_push(av, newSVpv(pname = "NDBM_File",0));
542 gv_stashpvn(pname, 9, TRUE);
543 av_push(av, newSVpv(pname = "DB_File",0));
544 gv_stashpvn(pname, 7, TRUE);
545 av_push(av, newSVpv(pname = "GDBM_File",0));
546 gv_stashpvn(pname, 9, TRUE);
547 av_push(av, newSVpv(pname = "SDBM_File",0));
548 gv_stashpvn(pname, 9, TRUE);
549 av_push(av, newSVpv(pname = "ODBM_File",0));
550 gv_stashpvn(pname, 9, TRUE);
556 if (strEQ(name, "OVERLOAD")) {
559 sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0);
562 #endif /* OVERLOAD */
564 if (strEQ(name, "SIG")) {
570 hv_magic(hv, siggv, 'S');
571 for(i=1;sig_name[i];i++) {
573 init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1);
575 sv_setsv(*init,&sv_undef);
579 /* initialize signal stack */
580 signalstack = newAV();
581 AvREAL_off(signalstack);
582 av_extend(signalstack, 30);
583 av_fill(signalstack, 0);
611 sv_setpv(GvSV(gv),chopset);
616 if (dowarn && len == 1 && sv_type == SVt_PV)
617 warn("Use of $%s is deprecated", name);
661 SvREADONLY_on(GvSV(gv));
663 sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
669 sv_setpv(GvSV(gv),"\f");
675 sv_setpv(GvSV(gv),"\034");
681 sv_upgrade(sv, SVt_PVNV);
682 sv_setpv(sv, patchlevel);
690 gv_fullname3(sv, gv, prefix)
695 HV *hv = GvSTASH(gv);
700 sv_setpv(sv, prefix ? prefix : "");
701 sv_catpv(sv,HvNAME(hv));
702 sv_catpvn(sv,"::", 2);
703 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
707 gv_efullname3(sv, gv, prefix)
715 gv_fullname3(sv, egv, prefix);
718 /* XXX compatibility with versions <= 5.003. */
724 gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
727 /* XXX compatibility with versions <= 5.003. */
733 gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
742 io = (IO*)NEWSV(0,0);
743 sv_upgrade((SV *)io,SVt_PVIO);
746 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
747 SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
763 for (i = 0; i <= (I32) HvMAX(stash); i++) {
764 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
765 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
766 (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
769 gv_check(hv); /* nested package */
771 else if (isALPHA(*HeKEY(entry))) {
772 gv = (GV*)HeVAL(entry);
775 curcop->cop_line = GvLINE(gv);
776 filegv = GvFILEGV(gv);
777 curcop->cop_filegv = filegv;
778 if (filegv && GvMULTI(filegv)) /* Filename began with slash */
780 warn("Name \"%s::%s\" used only once: possible typo",
781 HvNAME(stash), GvNAME(gv));
791 (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++);
792 return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV);
795 /* hopefully this is only called on local symbol table entries */
813 if (!gv || !(gp = GvGP(gv)))
815 if (gp->gp_refcnt == 0) {
816 warn("Attempt to free unreferenced glob pointers");
819 if (--gp->gp_refcnt > 0) {
820 if (gp->gp_egv == gv)
825 SvREFCNT_dec(gp->gp_sv);
826 SvREFCNT_dec(gp->gp_av);
827 SvREFCNT_dec(gp->gp_hv);
828 SvREFCNT_dec(gp->gp_io);
829 SvREFCNT_dec(gp->gp_cv);
830 SvREFCNT_dec(gp->gp_form);
836 #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
840 #ifdef MICROPORT /* Microport 2.4 hack */
845 return GvGP(gv)->gp_av;
847 return GvGP(gv_AVadd(gv))->gp_av;
854 return GvGP(gv)->gp_hv;
856 return GvGP(gv_HVadd(gv))->gp_hv;
858 #endif /* Microport 2.4 hack */
861 /* Updates and caches the CV's */
871 MAGIC* mg=mg_find((SV*)stash,'c');
872 AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL;
875 if (mg && (amtp=((AMT*)(mg->mg_ptr)))->was_ok_am == amagic_generation &&
876 amtp->was_ok_sub == sub_generation)
877 return AMT_AMAGIC(amtp);
878 if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
880 for (i=1; i<NofAMmeth; i++) {
881 if (amtp->table[i]) {
882 SvREFCNT_dec(amtp->table[i]);
886 sv_unmagic((SV*)stash, 'c');
888 DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
890 amt.was_ok_am = amagic_generation;
891 amt.was_ok_sub = sub_generation;
892 amt.fallback = AMGfallNO;
895 #ifdef OVERLOAD_VIA_HASH
896 gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
897 if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) {
904 /* Work with "fallback" key, which we assume to be first in AMG_names */
906 if (( cp = (char *)AMG_names[0] ) &&
907 (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
908 if (SvTRUE(sv)) amt.fallback=AMGfallYES;
909 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
911 for (i = 1; i < NofAMmeth; i++) {
913 cp = (char *)AMG_names[i];
915 svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
916 if (svp && ((sv = *svp) != &sv_undef)) {
917 switch (SvTYPE(sv)) {
920 if (!SvOK(sv)) break;
921 gv = gv_fetchmethod(stash, SvPV(sv, na));
922 if (gv) cv = GvCV(gv);
926 if (SvTYPE(cv) == SVt_PVCV)
931 croak("Not a subroutine reference in overload table");
937 if (!(cv = GvCVu((GV*)sv)))
938 cv = sv_2cv(sv, &stash, &gv, TRUE);
943 croak("Method for operation %s not found in package %.256s during blessing\n",
956 /* Work with "fallback" key, which we assume to be first in AMG_names */
958 if ( cp = (char *)AMG_names[0] ) {
959 /* Try to find via inheritance. */
960 gv = gv_fetchmeth(stash, "()", 2, 0); /* A cooky: "()". */
961 if (gv) sv = GvSV(gv);
963 if (!sv) /* Empty */;
964 else if (SvTRUE(sv)) amt.fallback=AMGfallYES;
965 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
968 for (i = 1; i < NofAMmeth; i++) {
970 cp = (char *)AMG_names[i];
972 *buf = '('; /* A cooky: "(". */
974 DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n",
975 cp, HvNAME(stash)) );
976 gv = gv_fetchmeth(stash, buf, strlen(buf), -1); /* no filling stash! */
977 if(gv && (cv = GvCV(gv))) {
979 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
980 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
981 /* GvSV contains the name of the method. */
984 DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
985 SvPV(GvSV(gv), na), cp, HvNAME(stash)) );
987 && (ngv = gv_fetchmethod(stash, SvPVX(GvSV(gv))))) {
988 name = SvPVX(GvSV(gv));
991 /* Can be an import stub (created by `can'). */
993 croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
994 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
997 croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'",
998 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1001 /* If the sub is only a stub then we may have a gv to AUTOLOAD */
1002 gv = (GV*)*hv_fetch(GvSTASH(gv), name, strlen(name), TRUE);
1005 DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
1006 cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
1007 GvNAME(CvGV(cv))) );
1011 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1014 AMT_AMAGIC_on(&amt);
1015 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
1019 /* Here we have no table: */
1020 AMT_AMAGIC_off(&amt);
1021 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
1025 /* During call to this subroutine stack can be reallocated. It is
1026 * advised to call SPAGAIN macro in your code after call */
1029 amagic_call(left,right,method,flags)
1037 CV **cvp=NULL, **ocvp=NULL;
1039 int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
1040 int postpr=0, inc_dec_ass=0, assignshift=assign?1:0;
1042 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1043 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
1044 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1045 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1047 && ((cv = cvp[off=method+assignshift])
1048 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1050 (fl = 1, cv = cvp[off=method])))) {
1051 lr = -1; /* Call method for left argument */
1053 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1056 /* look for substituted methods */
1059 if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1))
1060 || ((cv = cvp[off=add_amg]) && (postpr=1))) {
1061 right = &sv_yes; lr = -1; assign = 1;
1065 if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1))
1066 || ((cv = cvp[off=subtr_amg]) && (postpr=1))) {
1067 right = &sv_yes; lr = -1; assign = 1;
1071 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1074 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1077 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1080 (void)((cv = cvp[off=bool__amg])
1081 || (cv = cvp[off=numer_amg])
1082 || (cv = cvp[off=string_amg]));
1088 if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { /* Just to be
1095 SV* newref = newSVsv(ref);
1096 SvOBJECT_on(newref);
1097 SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref));
1103 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1104 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1105 SV* nullsv=sv_2mortal(newSViv(0));
1107 SV* lessp = amagic_call(left,nullsv,
1108 lt_amg,AMGf_noright);
1109 logic = SvTRUE(lessp);
1111 SV* lessp = amagic_call(left,nullsv,
1112 ncmp_amg,AMGf_noright);
1113 logic = (SvNV(lessp) < 0);
1116 if (off==subtr_amg) {
1127 if (cv = cvp[off=subtr_amg]) {
1129 left = sv_2mortal(newSViv(0));
1136 if (!cv) goto not_found;
1137 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1138 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c'))
1139 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1140 ? (amtp = (AMT*)mg->mg_ptr)->table
1142 && (cv = cvp[off=method])) { /* Method for right
1145 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1146 && (cvp=ocvp) && (lr = -1))
1147 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1148 && !(flags & AMGf_unary)) {
1149 /* We look for substitution for
1150 * comparison operations and
1152 if (method==concat_amg || method==concat_ass_amg
1153 || method==repeat_amg || method==repeat_ass_amg) {
1154 return NULL; /* Delegate operation to string conversion */
1164 postpr = 1; off=ncmp_amg; break;
1171 postpr = 1; off=scmp_amg; break;
1173 if (off != -1) cv = cvp[off];
1178 not_found: /* No method found, either report or croak */
1179 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1180 notfound = 1; lr = -1;
1181 } else if (cvp && (cv=cvp[nomethod_amg])) {
1182 notfound = 1; lr = 1;
1184 if (off==-1) off=method;
1185 sprintf(buf, "Operation `%s': no method found,\n\tleft argument %s%.256s,\n\tright argument %s%.256s",
1186 AMG_names[method + assignshift],
1188 "in overloaded package ":
1189 "has no overloaded magic",
1191 HvNAME(SvSTASH(SvRV(left))):
1194 "in overloaded package ":
1195 "has no overloaded magic",
1197 HvNAME(SvSTASH(SvRV(right))):
1199 if (amtp && amtp->fallback >= AMGfallYES) {
1200 DEBUG_o( deb(buf) );
1209 DEBUG_o( deb("Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %.256s%s\n",
1211 method+assignshift==off? "" :
1213 method+assignshift==off? "" :
1214 AMG_names[method+assignshift],
1215 method+assignshift==off? "" : "')",
1216 flags & AMGf_unary? "" :
1217 lr==1 ? " for right argument": " for left argument",
1218 flags & AMGf_unary? " for argument" : "",
1220 fl? ",\n\tassignment variant used": "") );
1221 /* Since we use shallow copy during assignment, we need
1222 * to dublicate the contents, probably calling user-supplied
1223 * version of copy operator
1225 if ((method + assignshift==off
1226 && (assign || method==inc_amg || method==dec_amg))
1227 || inc_dec_ass) RvDEEPCP(left);
1234 Zero(&myop, 1, BINOP);
1235 myop.op_last = (OP *) &myop;
1236 myop.op_next = Nullop;
1237 myop.op_flags = OPf_KNOW|OPf_STACKED;
1242 if (perldb && curstash != debstash)
1243 op->op_private |= OPpENTERSUB_DB;
1247 EXTEND(sp, notfound + 5);
1248 PUSHs(lr>0? right: left);
1249 PUSHs(lr>0? left: right);
1250 PUSHs( assign ? &sv_undef : (lr>0? &sv_yes: &sv_no));
1252 PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) );
1257 if (op = pp_entersub())
1266 /* sv_2mortal(res); */
1275 ans=SvIV(res)<=0; break;
1278 ans=SvIV(res)<0; break;
1281 ans=SvIV(res)>=0; break;
1284 ans=SvIV(res)>0; break;
1287 ans=SvIV(res)==0; break;
1290 ans=SvIV(res)!=0; break;
1293 SvSetSV(left,res); return left;
1295 ans=!SvOK(res); break;
1297 return ans? &sv_yes: &sv_no;
1298 } else if (method==copy_amg) {
1300 croak("Copy method did not return a reference");
1302 return SvREFCNT_inc(SvRV(res));
1308 #endif /* OVERLOAD */