3 * Copyright (c) 1991-1997, 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");
67 tmplen = strlen(name) + 2;
68 if (tmplen < sizeof smallbuf)
71 New(603, tmpbuf, tmplen + 1, char);
74 strcpy(tmpbuf + 2, name);
75 gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE);
77 gv_init(gv, defstash, tmpbuf, tmplen, FALSE);
78 if (tmpbuf != smallbuf)
80 sv_setpv(GvSV(gv), name);
81 if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm")))
84 hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
89 gv_init(gv, stash, name, len, multi)
99 sv_upgrade((SV*)gv, SVt_PVGV);
102 Newz(602, gp, 1, GP);
103 GvGP(gv) = gp_ref(gp);
104 GvSV(gv) = NEWSV(72,0);
105 GvLINE(gv) = curcop->cop_line;
106 GvFILEGV(gv) = curcop->cop_filegv;
108 sv_magic((SV*)gv, (SV*)gv, '*', name, len);
110 GvNAME(gv) = savepvn(name, len);
117 gv_init_sv(gv, sv_type)
135 gv_fetchmeth(stash, name, len, level)
149 if ((level > 100) || (level < -100))
150 croak("Recursive inheritance detected");
152 DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
154 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
159 if (SvTYPE(topgv) != SVt_PVGV)
160 gv_init(topgv, stash, name, len, TRUE);
161 if (cv = GvCV(topgv)) {
162 /* If genuine method or valid cache entry, use it */
163 if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation)
165 /* Stale cached entry: junk it */
167 GvCV(topgv) = cv = Nullcv;
172 gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE);
173 av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav;
175 /* create and re-create @.*::SUPER::ISA on demand */
176 if (!av || !SvMAGIC(av)) {
177 char* packname = HvNAME(stash);
178 STRLEN packlen = strlen(packname);
180 if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) {
184 basestash = gv_stashpvn(packname, packlen, TRUE);
185 gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
186 if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
187 dTHR; /* just for SvREFCNT_dec */
188 gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
189 if (!gvp || !(gv = *gvp))
190 croak("Cannot create %s::ISA", HvNAME(stash));
191 if (SvTYPE(gv) != SVt_PVGV)
192 gv_init(gv, stash, "ISA", 3, TRUE);
193 SvREFCNT_dec(GvAV(gv));
194 GvAV(gv) = (AV*)SvREFCNT_inc(av);
200 SV** svp = AvARRAY(av);
201 I32 items = AvFILL(av) + 1;
204 HV* basestash = gv_stashsv(sv, FALSE);
207 warn("Can't locate package %s for @%s::ISA",
208 SvPVX(sv), HvNAME(stash));
211 gv = gv_fetchmeth(basestash, name, len,
212 (level >= 0) ? level + 1 : level - 1);
218 /* if at top level, try UNIVERSAL */
220 if (level == 0 || level == -1) {
223 if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
224 if (gv = gv_fetchmeth(lastchance, name, len,
225 (level >= 0) ? level + 1 : level - 1)) {
228 * Cache method in topgv if:
229 * 1. topgv has no synonyms (else inheritance crosses wires)
230 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
233 GvREFCNT(topgv) == 1 &&
235 (CvROOT(cv) || CvXSUB(cv)))
237 dTHR; /* just for SvREFCNT_inc */
238 if (cv = GvCV(topgv))
240 GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
241 GvCVGEN(topgv) = sub_generation;
252 gv_fetchmethod(stash, name)
256 return gv_fetchmethod_autoload(stash, name, TRUE);
260 gv_fetchmethod_autoload(stash, name, autoload)
270 for (nend = name; *nend; nend++) {
273 else if (*nend == ':' && *(nend + 1) == ':')
277 char *origname = name;
281 if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
282 /* ->SUPER::method should really be looked up in original stash */
283 SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER",
284 HvNAME(curcop->cop_stash)));
285 stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE);
286 DEBUG_o( deb("Treating %s as %s::%s\n",
287 origname, HvNAME(stash), name) );
290 stash = gv_stashpvn(origname, nsplit - origname, TRUE);
293 gv = gv_fetchmeth(stash, name, nend - name, 0);
295 if (strEQ(name,"import"))
298 gv = gv_autoload4(stash, name, nend - name, TRUE);
302 if (!CvROOT(cv) && !CvXSUB(cv)) {
310 if (GvCV(stubgv) != cv) /* orphaned import */
313 autogv = gv_autoload4(GvSTASH(stubgv),
314 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
324 gv_autoload4(stash, name, len, method)
330 static char autoload[] = "AUTOLOAD";
331 static STRLEN autolen = 8;
338 if (len == autolen && strnEQ(name, autoload, autolen))
340 if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
345 * Inheriting AUTOLOAD for non-methods works ... for now.
347 if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash))
349 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
350 HvNAME(stash), (int)len, name);
353 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
354 * The subroutine's original name may not be "AUTOLOAD", so we don't
355 * use that, but for lack of anything better we will use the sub's
356 * original package to look up $AUTOLOAD.
358 varstash = GvSTASH(CvGV(cv));
359 vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
361 gv_init(vargv, varstash, autoload, autolen, FALSE);
363 sv_setpv(varsv, HvNAME(stash));
364 sv_catpvn(varsv, "::", 2);
365 sv_catpvn(varsv, name, len);
366 SvTAINTED_off(varsv);
371 gv_stashpv(name,create)
375 return gv_stashpvn(name, strlen(name), create);
379 gv_stashpvn(name,namelen,create)
389 if (namelen + 3 < sizeof smallbuf)
392 New(606, tmpbuf, namelen + 3, char);
393 Copy(name,tmpbuf,namelen,char);
394 tmpbuf[namelen++] = ':';
395 tmpbuf[namelen++] = ':';
396 tmpbuf[namelen] = '\0';
397 tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
398 if (tmpbuf != smallbuf)
403 GvHV(tmpgv) = newHV();
406 HvNAME(stash) = savepv(name);
411 gv_stashsv(sv,create)
418 return gv_stashpvn(ptr, len, create);
423 gv_fetchpv(nambeg,add,sv_type)
429 register char *name = nambeg;
433 register char *namend;
438 if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
441 for (namend = name; *namend; namend++) {
442 if ((*namend == '\'' && namend[1]) ||
443 (*namend == ':' && namend[1] == ':'))
447 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
452 New(601, tmpbuf, len+3, char);
453 Copy(name, tmpbuf, len, char);
457 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
459 if (!gvp || *gvp == (GV*)&sv_undef)
463 if (SvTYPE(gv) == SVt_PVGV)
468 gv_init(gv, stash, nambeg, namend - nambeg, (add & 2));
470 if (!(stash = GvHV(gv)))
471 stash = GvHV(gv) = newHV();
474 HvNAME(stash) = savepvn(nambeg, namend - nambeg);
482 return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE);
489 /* No stash in name, so see how we can default */
492 if (isIDFIRST(*name)) {
495 if (isUPPER(*name)) {
497 if (*name == 'S' && (
498 strEQ(name, "SIG") ||
499 strEQ(name, "STDIN") ||
500 strEQ(name, "STDOUT") ||
501 strEQ(name, "STDERR") ))
504 else if (*name > 'E') {
505 if (*name == 'I' && strEQ(name, "INC"))
508 else if (*name > 'A') {
509 if (*name == 'E' && strEQ(name, "ENV"))
512 else if (*name == 'A' && (
513 strEQ(name, "ARGV") ||
514 strEQ(name, "ARGVOUT") ))
517 else if (*name == '_' && !name[1])
522 else if ((COP*)curcop == &compiling) {
524 if (add && (hints & HINT_STRICT_VARS) &&
525 sv_type != SVt_PVCV &&
526 sv_type != SVt_PVGV &&
527 sv_type != SVt_PVFM &&
528 sv_type != SVt_PVIO &&
529 !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
531 gvp = (GV**)hv_fetch(stash,name,len,0);
533 *gvp == (GV*)&sv_undef ||
534 SvTYPE(*gvp) != SVt_PVGV)
538 else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) ||
539 sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) ||
540 sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) )
542 warn("Variable \"%c%s\" is not imported",
543 sv_type == SVt_PVAV ? '@' :
544 sv_type == SVt_PVHV ? '%' : '$',
547 warn("(Did you mean &%s instead?)\n", name);
553 stash = curcop->cop_stash;
559 /* By this point we should have a stash and a name */
563 warn("Global symbol \"%s\" requires explicit package name", name);
565 stash = curstash ? curstash : defstash; /* avoid core dumps */
566 add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV
567 : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV
568 : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV
575 if (!SvREFCNT(stash)) /* symbol table under destruction */
578 gvp = (GV**)hv_fetch(stash,name,len,add);
579 if (!gvp || *gvp == (GV*)&sv_undef)
582 if (SvTYPE(gv) == SVt_PVGV) {
585 gv_init_sv(gv, sv_type);
590 /* Adding a new symbol */
593 warn("Had to create %s unexpectedly", nambeg);
594 gv_init(gv, stash, name, len, add & 2);
595 gv_init_sv(gv, sv_type);
596 GvFLAGS(gv) |= add_gvflags;
598 /* set up magic where warranted */
601 if (strEQ(name, "ARGV")) {
602 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
612 if (strnEQ(name, "EXPORT", 6))
616 if (strEQ(name, "ISA")) {
619 sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
620 if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1)
623 av_push(av, newSVpv(pname = "NDBM_File",0));
624 gv_stashpvn(pname, 9, TRUE);
625 av_push(av, newSVpv(pname = "DB_File",0));
626 gv_stashpvn(pname, 7, TRUE);
627 av_push(av, newSVpv(pname = "GDBM_File",0));
628 gv_stashpvn(pname, 9, TRUE);
629 av_push(av, newSVpv(pname = "SDBM_File",0));
630 gv_stashpvn(pname, 9, TRUE);
631 av_push(av, newSVpv(pname = "ODBM_File",0));
632 gv_stashpvn(pname, 9, TRUE);
638 if (strEQ(name, "OVERLOAD")) {
641 sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0);
644 #endif /* OVERLOAD */
646 if (strEQ(name, "SIG")) {
652 hv_magic(hv, siggv, 'S');
653 for(i=1;sig_name[i];i++) {
655 init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1);
657 sv_setsv(*init,&sv_undef);
661 /* initialize signal stack */
662 signalstack = newAV();
663 AvREAL_off(signalstack);
664 av_extend(signalstack, 30);
665 av_fill(signalstack, 0);
693 sv_setpv(GvSV(gv),chopset);
699 #ifdef COMPLEX_STATUS
700 sv_upgrade(GvSV(gv), SVt_PVLV);
706 if (dowarn && len == 1 && sv_type == SVt_PV)
707 warn("Use of $%s is deprecated", name);
751 SvREADONLY_on(GvSV(gv));
753 sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
759 sv_setpv(GvSV(gv),"\f");
765 sv_setpv(GvSV(gv),"\034");
770 sv_upgrade(sv, SVt_PVNV);
771 sv_setpv(sv, patchlevel);
781 gv_fullname3(sv, gv, prefix)
786 HV *hv = GvSTASH(gv);
791 sv_setpv(sv, prefix ? prefix : "");
792 sv_catpv(sv,HvNAME(hv));
793 sv_catpvn(sv,"::", 2);
794 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
798 gv_efullname3(sv, gv, prefix)
806 gv_fullname3(sv, egv, prefix);
809 /* XXX compatibility with versions <= 5.003. */
815 gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
818 /* XXX compatibility with versions <= 5.003. */
824 gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
834 io = (IO*)NEWSV(0,0);
835 sv_upgrade((SV *)io,SVt_PVIO);
838 iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
840 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
841 SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
858 for (i = 0; i <= (I32) HvMAX(stash); i++) {
859 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
860 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
861 (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
864 gv_check(hv); /* nested package */
866 else if (isALPHA(*HeKEY(entry))) {
867 gv = (GV*)HeVAL(entry);
870 curcop->cop_line = GvLINE(gv);
871 filegv = GvFILEGV(gv);
872 curcop->cop_filegv = filegv;
873 if (filegv && GvMULTI(filegv)) /* Filename began with slash */
875 warn("Name \"%s::%s\" used only once: possible typo",
876 HvNAME(stash), GvNAME(gv));
886 return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++),
890 /* hopefully this is only called on local symbol table entries */
899 /* multi-named GPs cannot be used for method cache */
900 SvREFCNT_dec(gp->gp_cv);
905 /* Adding a new name to a subroutine invalidates method cache */
919 if (!gv || !(gp = GvGP(gv)))
921 if (gp->gp_refcnt == 0) {
922 warn("Attempt to free unreferenced glob pointers");
926 /* Deleting the name of a subroutine invalidates method cache */
929 if (--gp->gp_refcnt > 0) {
930 if (gp->gp_egv == gv)
935 SvREFCNT_dec(gp->gp_sv);
936 SvREFCNT_dec(gp->gp_av);
937 SvREFCNT_dec(gp->gp_hv);
938 SvREFCNT_dec(gp->gp_io);
939 SvREFCNT_dec(gp->gp_cv);
940 SvREFCNT_dec(gp->gp_form);
946 #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
950 #ifdef MICROPORT /* Microport 2.4 hack */
955 return GvGP(gv)->gp_av;
957 return GvGP(gv_AVadd(gv))->gp_av;
964 return GvGP(gv)->gp_hv;
966 return GvGP(gv_HVadd(gv))->gp_hv;
968 #endif /* Microport 2.4 hack */
971 /* Updates and caches the CV's */
982 MAGIC* mg=mg_find((SV*)stash,'c');
983 AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL;
986 if (mg && amtp->was_ok_am == amagic_generation
987 && amtp->was_ok_sub == sub_generation)
988 return AMT_AMAGIC(amtp);
989 if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
991 for (i=1; i<NofAMmeth; i++) {
992 if (amtp->table[i]) {
993 SvREFCNT_dec(amtp->table[i]);
997 sv_unmagic((SV*)stash, 'c');
999 DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
1001 amt.was_ok_am = amagic_generation;
1002 amt.was_ok_sub = sub_generation;
1003 amt.fallback = AMGfallNO;
1006 #ifdef OVERLOAD_VIA_HASH
1007 gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
1008 if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) {
1015 /* Work with "fallback" key, which we assume to be first in AMG_names */
1017 if (( cp = (char *)AMG_names[0] ) &&
1018 (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
1019 if (SvTRUE(sv)) amt.fallback=AMGfallYES;
1020 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
1022 for (i = 1; i < NofAMmeth; i++) {
1024 cp = (char *)AMG_names[i];
1026 svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
1027 if (svp && ((sv = *svp) != &sv_undef)) {
1028 switch (SvTYPE(sv)) {
1031 if (!SvOK(sv)) break;
1032 gv = gv_fetchmethod(stash, SvPV(sv, na));
1033 if (gv) cv = GvCV(gv);
1037 if (SvTYPE(cv) == SVt_PVCV)
1042 croak("Not a subroutine reference in overload table");
1048 if (!(cv = GvCVu((GV*)sv)))
1049 cv = sv_2cv(sv, &stash, &gv, TRUE);
1054 croak("Method for operation %s not found in package %.256s during blessing\n",
1067 /* Work with "fallback" key, which we assume to be first in AMG_names */
1069 if ( cp = AMG_names[0] ) {
1070 /* Try to find via inheritance. */
1071 gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */
1072 if (gv) sv = GvSV(gv);
1074 if (!gv) goto no_table;
1075 else if (SvTRUE(sv)) amt.fallback=AMGfallYES;
1076 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
1079 for (i = 1; i < NofAMmeth; i++) {
1080 SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i]));
1081 DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n",
1082 cp, HvNAME(stash)) );
1083 /* don't fill the cache while looking up! */
1084 gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1);
1086 if(gv && (cv = GvCV(gv))) {
1087 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1088 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
1089 /* GvSV contains the name of the method. */
1092 DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
1093 SvPV(GvSV(gv), na), cp, HvNAME(stash)) );
1094 if (!SvPOK(GvSV(gv))
1095 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)),
1098 /* Can be an import stub (created by `can'). */
1100 croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
1101 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1104 croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'",
1105 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1108 cv = GvCV(gv = ngv);
1110 DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
1111 cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
1112 GvNAME(CvGV(cv))) );
1116 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1119 AMT_AMAGIC_on(&amt);
1120 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
1124 /* Here we have no table: */
1126 AMT_AMAGIC_off(&amt);
1127 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
1131 /* During call to this subroutine stack can be reallocated. It is
1132 * advised to call SPAGAIN macro in your code after call */
1135 amagic_call(left,right,method,flags)
1144 CV **cvp=NULL, **ocvp=NULL;
1146 int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
1147 int postpr=0, inc_dec_ass=0, assignshift=assign?1:0;
1149 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1150 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
1151 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1152 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1154 && ((cv = cvp[off=method+assignshift])
1155 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1157 (fl = 1, cv = cvp[off=method])))) {
1158 lr = -1; /* Call method for left argument */
1160 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1163 /* look for substituted methods */
1166 if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1))
1167 || ((cv = cvp[off=add_amg]) && (postpr=1))) {
1168 right = &sv_yes; lr = -1; assign = 1;
1172 if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1))
1173 || ((cv = cvp[off=subtr_amg]) && (postpr=1))) {
1174 right = &sv_yes; lr = -1; assign = 1;
1178 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1181 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1184 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1187 (void)((cv = cvp[off=bool__amg])
1188 || (cv = cvp[off=numer_amg])
1189 || (cv = cvp[off=string_amg]));
1195 if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) {
1197 * Just to be extra cautious. Maybe in some
1198 * additional cases sv_setsv is safe, too.
1200 SV* newref = newSVsv(ref);
1201 SvOBJECT_on(newref);
1202 SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref));
1208 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1209 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1210 SV* nullsv=sv_2mortal(newSViv(0));
1212 SV* lessp = amagic_call(left,nullsv,
1213 lt_amg,AMGf_noright);
1214 logic = SvTRUE(lessp);
1216 SV* lessp = amagic_call(left,nullsv,
1217 ncmp_amg,AMGf_noright);
1218 logic = (SvNV(lessp) < 0);
1221 if (off==subtr_amg) {
1232 if (cv = cvp[off=subtr_amg]) {
1234 left = sv_2mortal(newSViv(0));
1241 if (!cv) goto not_found;
1242 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1243 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c'))
1244 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1245 ? (amtp = (AMT*)mg->mg_ptr)->table
1247 && (cv = cvp[off=method])) { /* Method for right
1250 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1251 && (cvp=ocvp) && (lr = -1))
1252 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1253 && !(flags & AMGf_unary)) {
1254 /* We look for substitution for
1255 * comparison operations and
1257 if (method==concat_amg || method==concat_ass_amg
1258 || method==repeat_amg || method==repeat_ass_amg) {
1259 return NULL; /* Delegate operation to string conversion */
1269 postpr = 1; off=ncmp_amg; break;
1276 postpr = 1; off=scmp_amg; break;
1278 if (off != -1) cv = cvp[off];
1283 not_found: /* No method found, either report or croak */
1284 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1285 notfound = 1; lr = -1;
1286 } else if (cvp && (cv=cvp[nomethod_amg])) {
1287 notfound = 1; lr = 1;
1290 if (off==-1) off=method;
1291 msg = sv_2mortal(newSVpvf(
1292 "Operation `%s': no method found,%sargument %s%s%s%s",
1293 AMG_names[method + assignshift],
1294 (flags & AMGf_unary ? " " : "\n\tleft "),
1296 "in overloaded package ":
1297 "has no overloaded magic",
1299 HvNAME(SvSTASH(SvRV(left))):
1302 ",\n\tright argument in overloaded package ":
1305 : ",\n\tright argument has no overloaded magic"),
1307 HvNAME(SvSTASH(SvRV(right))):
1309 if (amtp && amtp->fallback >= AMGfallYES) {
1310 DEBUG_o( deb("%s", SvPVX(msg)) );
1320 "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
1322 method+assignshift==off? "" :
1324 method+assignshift==off? "" :
1325 AMG_names[method+assignshift],
1326 method+assignshift==off? "" : "')",
1327 flags & AMGf_unary? "" :
1328 lr==1 ? " for right argument": " for left argument",
1329 flags & AMGf_unary? " for argument" : "",
1331 fl? ",\n\tassignment variant used": "") );
1332 /* Since we use shallow copy during assignment, we need
1333 * to dublicate the contents, probably calling user-supplied
1334 * version of copy operator
1336 if ((method + assignshift==off
1337 && (assign || method==inc_amg || method==dec_amg))
1338 || inc_dec_ass) RvDEEPCP(left);
1345 bool oldcatch = CATCH_GET;
1348 Zero(&myop, 1, BINOP);
1349 myop.op_last = (OP *) &myop;
1350 myop.op_next = Nullop;
1351 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
1356 if (PERLDB_SUB && curstash != debstash)
1357 op->op_private |= OPpENTERSUB_DB;
1361 EXTEND(sp, notfound + 5);
1362 PUSHs(lr>0? right: left);
1363 PUSHs(lr>0? left: right);
1364 PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no ));
1366 PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) );
1371 if (op = pp_entersub(ARGS))
1378 CATCH_SET(oldcatch);
1385 ans=SvIV(res)<=0; break;
1388 ans=SvIV(res)<0; break;
1391 ans=SvIV(res)>=0; break;
1394 ans=SvIV(res)>0; break;
1397 ans=SvIV(res)==0; break;
1400 ans=SvIV(res)!=0; break;
1403 SvSetSV(left,res); return left;
1405 ans=!SvOK(res); break;
1408 } else if (method==copy_amg) {
1410 croak("Copy method did not return a reference");
1412 return SvREFCNT_inc(SvRV(res));
1418 #endif /* OVERLOAD */