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);
93 GvSV(gv) = NEWSV(72,0);
94 GvLINE(gv) = curcop->cop_line;
95 GvFILEGV(gv) = curcop->cop_filegv;
97 sv_magic((SV*)gv, (SV*)gv, '*', name, len);
99 GvNAME(gv) = savepvn(name, len);
106 gv_init_sv(gv, sv_type)
124 gv_fetchmeth(stash, name, len, level)
139 if ((level > 100) || (level < -100))
140 croak("Recursive inheritance detected");
142 DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
144 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
149 if (SvTYPE(topgv) != SVt_PVGV)
150 gv_init(topgv, stash, name, len, TRUE);
151 if (cv = GvCV(topgv)) {
152 /* If genuine method or valid cache entry, use it */
153 if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation)
155 /* Stale cached entry: junk it */
157 GvCV(topgv) = cv = Nullcv;
162 gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
163 if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
164 SV** svp = AvARRAY(av);
165 I32 items = AvFILL(av) + 1;
168 HV* basestash = gv_stashsv(sv, FALSE);
171 warn("Can't locate package %s for @%s::ISA",
172 SvPVX(sv), HvNAME(stash));
175 gv = gv_fetchmeth(basestash, name, len,
176 (level >= 0) ? level + 1 : level - 1);
182 if (level == 0 || level == -1) {
183 if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
184 if (gv = gv_fetchmeth(lastchance, name, len,
185 (level >= 0) ? level + 1 : level - 1)) {
187 /* Use topgv for cache only if it has no synonyms */
188 if (topgv && GvREFCNT(topgv) == 1) {
189 if (cv = GvCV(topgv))
191 GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
192 GvCVGEN(topgv) = sub_generation;
203 gv_fetchmethod(stash, name)
211 for (nend = name; *nend; nend++) {
212 if (*nend == ':' || *nend == '\'')
217 char *origname = name;
223 if (strEQ(origname,"SUPER")) {
224 /* Degenerate case ->SUPER::method should really lookup in original stash */
225 SV *tmpstr = sv_2mortal(newSVpv(HvNAME(curcop->cop_stash),0));
226 sv_catpvn(tmpstr, "::SUPER", 7);
227 stash = gv_stashpvn(SvPVX(tmpstr),SvCUR(tmpstr),TRUE);
229 DEBUG_o( deb("Treating %s as %s::%s\n",origname,HvNAME(stash),name) );
231 stash = gv_stashpvn(origname, nsplit - origname, TRUE);
235 gv = gv_fetchmeth(stash, name, nend - name, 0);
238 /* Failed obvious case - look for SUPER as last element of stash's name */
239 char *packname = HvNAME(stash);
240 STRLEN len = strlen(packname);
241 if (len >= 7 && strEQ(packname+len-7,"::SUPER")) {
242 /* Now look for @.*::SUPER::ISA */
243 GV** gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
245 if (!gvp || (gv = *gvp) == (GV*)&sv_undef || !GvAV(gv)) {
246 /* No @ISA in package ending in ::SUPER - drop suffix
247 and see if there is an @ISA there
250 char ch = packname[len];
252 packname[len] = '\0';
253 basestash = gv_stashpvn(packname, len, TRUE);
255 gvp = (GV**)hv_fetch(basestash,"ISA",3,FALSE);
256 if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
257 /* Okay found @ISA after dropping the SUPER, alias it */
258 SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0));
259 sv_catpvn(tmpstr, "::ISA", 5);
260 gv = gv_fetchpv(SvPV(tmpstr,na),TRUE,SVt_PVGV);
262 GvAV(gv) = (AV*)SvREFCNT_inc(av);
263 /* ... and re-try lookup */
264 gv = gv_fetchmeth(stash, name, nend - name, 0);
266 croak("Cannot create %s::ISA",HvNAME(stash));
274 if (strEQ(name,"import"))
277 gv = gv_autoload(stash, name, nend - name);
284 gv_autoload(stash, name, len)
289 static char autoload[] = "AUTOLOAD";
290 static STRLEN autolen = 8;
297 if (len == autolen && strnEQ(name, autoload, autolen))
299 if (!(gv = gv_fetchmeth(stash, autoload, autolen, 0)))
304 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
305 * The subroutine's original name may not be "AUTOLOAD", so we don't
306 * use that, but for lack of anything better we will use the sub's
307 * original package to look up $AUTOLOAD.
309 varstash = GvSTASH(CvGV(cv));
310 vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
312 gv_init(vargv, varstash, autoload, autolen, FALSE);
314 sv_setpv(varsv, HvNAME(stash));
315 sv_catpvn(varsv, "::", 2);
316 sv_catpvn(varsv, name, len);
317 SvTAINTED_off(varsv);
322 gv_stashpv(name,create)
326 return gv_stashpvn(name, strlen(name), create);
330 gv_stashpvn(name,namelen,create)
339 if (namelen > 1200) {
342 warn("Weird package name \"%s\" truncated", name);
344 warn("Weird package name \"%.*s...\" truncated", namelen, name);
347 Copy(name,tmpbuf,namelen,char);
348 tmpbuf[namelen++] = ':';
349 tmpbuf[namelen++] = ':';
350 tmpbuf[namelen] = '\0';
351 tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV);
355 GvHV(tmpgv) = newHV();
358 HvNAME(stash) = savepv(name);
363 gv_stashsv(sv,create)
370 return gv_stashpvn(ptr, len, create);
375 gv_fetchpv(nambeg,add,sv_type)
380 register char *name = nambeg;
384 register char *namend;
389 if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
392 for (namend = name; *namend; namend++) {
393 if ((*namend == '\'' && namend[1]) ||
394 (*namend == ':' && namend[1] == ':'))
398 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
403 New(601, tmpbuf, len+3, char);
404 Copy(name, tmpbuf, len, char);
408 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
410 if (!gvp || *gvp == (GV*)&sv_undef)
414 if (SvTYPE(gv) == SVt_PVGV)
419 gv_init(gv, stash, nambeg, namend - nambeg, (add & 2));
421 if (!(stash = GvHV(gv)))
422 stash = GvHV(gv) = newHV();
425 HvNAME(stash) = savepvn(nambeg, namend - nambeg);
433 return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE);
440 /* No stash in name, so see how we can default */
443 if (isIDFIRST(*name)) {
444 if (isUPPER(*name)) {
446 if (*name == 'S' && (
447 strEQ(name, "SIG") ||
448 strEQ(name, "STDIN") ||
449 strEQ(name, "STDOUT") ||
450 strEQ(name, "STDERR") ))
453 else if (*name > 'E') {
454 if (*name == 'I' && strEQ(name, "INC"))
457 else if (*name > 'A') {
458 if (*name == 'E' && strEQ(name, "ENV"))
461 else if (*name == 'A' && (
462 strEQ(name, "ARGV") ||
463 strEQ(name, "ARGVOUT") ))
466 else if (*name == '_' && !name[1])
470 else if ((COP*)curcop == &compiling) {
472 if (add && (hints & HINT_STRICT_VARS) &&
473 sv_type != SVt_PVCV &&
474 sv_type != SVt_PVGV &&
475 sv_type != SVt_PVFM &&
476 sv_type != SVt_PVIO &&
477 !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
479 gvp = (GV**)hv_fetch(stash,name,len,0);
481 *gvp == (GV*)&sv_undef ||
482 SvTYPE(*gvp) != SVt_PVGV)
486 else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) ||
487 sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) ||
488 sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) )
490 warn("Variable \"%c%s\" is not imported",
491 sv_type == SVt_PVAV ? '@' :
492 sv_type == SVt_PVHV ? '%' : '$',
495 warn("(Did you mean &%s instead?)\n", name);
501 stash = curcop->cop_stash;
507 /* By this point we should have a stash and a name */
511 warn("Global symbol \"%s\" requires explicit package name", name);
513 stash = curstash ? curstash : defstash; /* avoid core dumps */
519 if (!SvREFCNT(stash)) /* symbol table under destruction */
522 gvp = (GV**)hv_fetch(stash,name,len,add);
523 if (!gvp || *gvp == (GV*)&sv_undef)
526 if (SvTYPE(gv) == SVt_PVGV) {
529 gv_init_sv(gv, sv_type);
534 /* Adding a new symbol */
537 warn("Had to create %s unexpectedly", nambeg);
538 gv_init(gv, stash, name, len, add & 2);
539 gv_init_sv(gv, sv_type);
541 /* set up magic where warranted */
544 if (strEQ(name, "ARGV")) {
545 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
555 if (strnEQ(name, "EXPORT", 6))
559 if (strEQ(name, "ISA")) {
562 sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
563 if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1)
566 av_push(av, newSVpv(pname = "NDBM_File",0));
567 gv_stashpvn(pname, 9, TRUE);
568 av_push(av, newSVpv(pname = "DB_File",0));
569 gv_stashpvn(pname, 7, TRUE);
570 av_push(av, newSVpv(pname = "GDBM_File",0));
571 gv_stashpvn(pname, 9, TRUE);
572 av_push(av, newSVpv(pname = "SDBM_File",0));
573 gv_stashpvn(pname, 9, TRUE);
574 av_push(av, newSVpv(pname = "ODBM_File",0));
575 gv_stashpvn(pname, 9, TRUE);
581 if (strEQ(name, "OVERLOAD")) {
584 sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0);
587 #endif /* OVERLOAD */
589 if (strEQ(name, "SIG")) {
595 hv_magic(hv, siggv, 'S');
596 for(i=1;sig_name[i];i++) {
598 init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1);
600 sv_setsv(*init,&sv_undef);
604 /* initialize signal stack */
605 signalstack = newAV();
606 AvREAL_off(signalstack);
607 av_extend(signalstack, 30);
608 av_fill(signalstack, 0);
636 sv_setpv(GvSV(gv),chopset);
641 if (dowarn && len == 1 && sv_type == SVt_PV)
642 warn("Use of $%s is deprecated", name);
686 SvREADONLY_on(GvSV(gv));
688 sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
694 sv_setpv(GvSV(gv),"\f");
700 sv_setpv(GvSV(gv),"\034");
706 sv_upgrade(sv, SVt_PVNV);
707 sv_setpv(sv, patchlevel);
715 gv_fullname3(sv, gv, prefix)
720 HV *hv = GvSTASH(gv);
725 sv_setpv(sv, prefix ? prefix : "");
726 sv_catpv(sv,HvNAME(hv));
727 sv_catpvn(sv,"::", 2);
728 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
732 gv_efullname3(sv, gv, prefix)
740 gv_fullname3(sv, egv, prefix);
743 /* XXX compatibility with versions <= 5.003. */
749 gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
752 /* XXX compatibility with versions <= 5.003. */
758 gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
767 io = (IO*)NEWSV(0,0);
768 sv_upgrade((SV *)io,SVt_PVIO);
771 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
772 SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
788 for (i = 0; i <= (I32) HvMAX(stash); i++) {
789 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
790 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
791 (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
794 gv_check(hv); /* nested package */
796 else if (isALPHA(*HeKEY(entry))) {
797 gv = (GV*)HeVAL(entry);
800 curcop->cop_line = GvLINE(gv);
801 filegv = GvFILEGV(gv);
802 curcop->cop_filegv = filegv;
803 if (filegv && GvMULTI(filegv)) /* Filename began with slash */
805 warn("Name \"%s::%s\" used only once: possible typo",
806 HvNAME(stash), GvNAME(gv));
816 (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++);
817 return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV);
820 /* hopefully this is only called on local symbol table entries */
829 /* multi-named GPs cannot be used for method cache */
830 SvREFCNT_dec(gp->gp_cv);
835 /* Adding a new name to a subroutine invalidates method cache */
849 if (!gv || !(gp = GvGP(gv)))
851 if (gp->gp_refcnt == 0) {
852 warn("Attempt to free unreferenced glob pointers");
856 /* Deleting the name of a subroutine invalidates method cache */
859 if (--gp->gp_refcnt > 0) {
860 if (gp->gp_egv == gv)
865 SvREFCNT_dec(gp->gp_sv);
866 SvREFCNT_dec(gp->gp_av);
867 SvREFCNT_dec(gp->gp_hv);
868 SvREFCNT_dec(gp->gp_io);
869 SvREFCNT_dec(gp->gp_cv);
870 SvREFCNT_dec(gp->gp_form);
876 #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
880 #ifdef MICROPORT /* Microport 2.4 hack */
885 return GvGP(gv)->gp_av;
887 return GvGP(gv_AVadd(gv))->gp_av;
894 return GvGP(gv)->gp_hv;
896 return GvGP(gv_HVadd(gv))->gp_hv;
898 #endif /* Microport 2.4 hack */
901 /* Updates and caches the CV's */
911 MAGIC* mg=mg_find((SV*)stash,'c');
912 AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL;
915 if (mg && (amtp=((AMT*)(mg->mg_ptr)))->was_ok_am == amagic_generation &&
916 amtp->was_ok_sub == sub_generation)
917 return AMT_AMAGIC(amtp);
918 if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
920 for (i=1; i<NofAMmeth; i++) {
921 if (amtp->table[i]) {
922 SvREFCNT_dec(amtp->table[i]);
926 sv_unmagic((SV*)stash, 'c');
928 DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
930 amt.was_ok_am = amagic_generation;
931 amt.was_ok_sub = sub_generation;
932 amt.fallback = AMGfallNO;
935 #ifdef OVERLOAD_VIA_HASH
936 gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
937 if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) {
944 /* Work with "fallback" key, which we assume to be first in AMG_names */
946 if (( cp = (char *)AMG_names[0] ) &&
947 (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
948 if (SvTRUE(sv)) amt.fallback=AMGfallYES;
949 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
951 for (i = 1; i < NofAMmeth; i++) {
953 cp = (char *)AMG_names[i];
955 svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
956 if (svp && ((sv = *svp) != &sv_undef)) {
957 switch (SvTYPE(sv)) {
960 if (!SvOK(sv)) break;
961 gv = gv_fetchmethod(stash, SvPV(sv, na));
962 if (gv) cv = GvCV(gv);
966 if (SvTYPE(cv) == SVt_PVCV)
971 croak("Not a subroutine reference in overload table");
977 if (!(cv = GvCVu((GV*)sv)))
978 cv = sv_2cv(sv, &stash, &gv, TRUE);
983 croak("Method for operation %s not found in package %.256s during blessing\n",
996 /* Work with "fallback" key, which we assume to be first in AMG_names */
998 if ( cp = (char *)AMG_names[0] ) {
999 /* Try to find via inheritance. */
1000 gv = gv_fetchmeth(stash, "()", 2, 0); /* A cooky: "()". */
1001 if (gv) sv = GvSV(gv);
1003 if (!sv) /* Empty */;
1004 else if (SvTRUE(sv)) amt.fallback=AMGfallYES;
1005 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
1008 for (i = 1; i < NofAMmeth; i++) {
1010 cp = (char *)AMG_names[i];
1012 *buf = '('; /* A cooky: "(". */
1013 strcpy(buf + 1, cp);
1014 DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n",
1015 cp, HvNAME(stash)) );
1016 gv = gv_fetchmeth(stash, buf, strlen(buf), -1); /* no filling stash! */
1017 if(gv && (cv = GvCV(gv))) {
1019 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1020 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
1021 /* GvSV contains the name of the method. */
1024 DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
1025 SvPV(GvSV(gv), na), cp, HvNAME(stash)) );
1027 && (ngv = gv_fetchmethod(stash, SvPVX(GvSV(gv))))) {
1028 name = SvPVX(GvSV(gv));
1029 cv = GvCV(gv = ngv);
1031 /* Can be an import stub (created by `can'). */
1033 croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
1034 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1037 croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'",
1038 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1041 /* If the sub is only a stub then we may have a gv to AUTOLOAD */
1042 gv = (GV*)*hv_fetch(GvSTASH(gv), name, strlen(name), TRUE);
1045 DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
1046 cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
1047 GvNAME(CvGV(cv))) );
1051 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1054 AMT_AMAGIC_on(&amt);
1055 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
1059 /* Here we have no table: */
1060 AMT_AMAGIC_off(&amt);
1061 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
1065 /* During call to this subroutine stack can be reallocated. It is
1066 * advised to call SPAGAIN macro in your code after call */
1069 amagic_call(left,right,method,flags)
1077 CV **cvp=NULL, **ocvp=NULL;
1079 int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
1080 int postpr=0, inc_dec_ass=0, assignshift=assign?1:0;
1082 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1083 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
1084 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1085 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1087 && ((cv = cvp[off=method+assignshift])
1088 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1090 (fl = 1, cv = cvp[off=method])))) {
1091 lr = -1; /* Call method for left argument */
1093 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1096 /* look for substituted methods */
1099 if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1))
1100 || ((cv = cvp[off=add_amg]) && (postpr=1))) {
1101 right = &sv_yes; lr = -1; assign = 1;
1105 if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1))
1106 || ((cv = cvp[off=subtr_amg]) && (postpr=1))) {
1107 right = &sv_yes; lr = -1; assign = 1;
1111 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1114 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1117 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1120 (void)((cv = cvp[off=bool__amg])
1121 || (cv = cvp[off=numer_amg])
1122 || (cv = cvp[off=string_amg]));
1128 if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { /* Just to be
1135 SV* newref = newSVsv(ref);
1136 SvOBJECT_on(newref);
1137 SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref));
1143 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1144 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1145 SV* nullsv=sv_2mortal(newSViv(0));
1147 SV* lessp = amagic_call(left,nullsv,
1148 lt_amg,AMGf_noright);
1149 logic = SvTRUE(lessp);
1151 SV* lessp = amagic_call(left,nullsv,
1152 ncmp_amg,AMGf_noright);
1153 logic = (SvNV(lessp) < 0);
1156 if (off==subtr_amg) {
1167 if (cv = cvp[off=subtr_amg]) {
1169 left = sv_2mortal(newSViv(0));
1176 if (!cv) goto not_found;
1177 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1178 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c'))
1179 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1180 ? (amtp = (AMT*)mg->mg_ptr)->table
1182 && (cv = cvp[off=method])) { /* Method for right
1185 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1186 && (cvp=ocvp) && (lr = -1))
1187 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1188 && !(flags & AMGf_unary)) {
1189 /* We look for substitution for
1190 * comparison operations and
1192 if (method==concat_amg || method==concat_ass_amg
1193 || method==repeat_amg || method==repeat_ass_amg) {
1194 return NULL; /* Delegate operation to string conversion */
1204 postpr = 1; off=ncmp_amg; break;
1211 postpr = 1; off=scmp_amg; break;
1213 if (off != -1) cv = cvp[off];
1218 not_found: /* No method found, either report or croak */
1219 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1220 notfound = 1; lr = -1;
1221 } else if (cvp && (cv=cvp[nomethod_amg])) {
1222 notfound = 1; lr = 1;
1224 if (off==-1) off=method;
1225 sprintf(buf, "Operation `%s': no method found,\n\tleft argument %s%.256s,\n\tright argument %s%.256s",
1226 AMG_names[method + assignshift],
1228 "in overloaded package ":
1229 "has no overloaded magic",
1231 HvNAME(SvSTASH(SvRV(left))):
1234 "in overloaded package ":
1235 "has no overloaded magic",
1237 HvNAME(SvSTASH(SvRV(right))):
1239 if (amtp && amtp->fallback >= AMGfallYES) {
1240 DEBUG_o( deb(buf) );
1249 DEBUG_o( deb("Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %.256s%s\n",
1251 method+assignshift==off? "" :
1253 method+assignshift==off? "" :
1254 AMG_names[method+assignshift],
1255 method+assignshift==off? "" : "')",
1256 flags & AMGf_unary? "" :
1257 lr==1 ? " for right argument": " for left argument",
1258 flags & AMGf_unary? " for argument" : "",
1260 fl? ",\n\tassignment variant used": "") );
1261 /* Since we use shallow copy during assignment, we need
1262 * to dublicate the contents, probably calling user-supplied
1263 * version of copy operator
1265 if ((method + assignshift==off
1266 && (assign || method==inc_amg || method==dec_amg))
1267 || inc_dec_ass) RvDEEPCP(left);
1274 Zero(&myop, 1, BINOP);
1275 myop.op_last = (OP *) &myop;
1276 myop.op_next = Nullop;
1277 myop.op_flags = OPf_KNOW|OPf_STACKED;
1282 if (perldb && curstash != debstash)
1283 op->op_private |= OPpENTERSUB_DB;
1287 EXTEND(sp, notfound + 5);
1288 PUSHs(lr>0? right: left);
1289 PUSHs(lr>0? left: right);
1290 PUSHs( assign ? &sv_undef : (lr>0? &sv_yes: &sv_no));
1292 PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) );
1297 if (op = pp_entersub())
1306 /* sv_2mortal(res); */
1315 ans=SvIV(res)<=0; break;
1318 ans=SvIV(res)<0; break;
1321 ans=SvIV(res)>=0; break;
1324 ans=SvIV(res)>0; break;
1327 ans=SvIV(res)==0; break;
1330 ans=SvIV(res)!=0; break;
1333 SvSetSV(left,res); return left;
1335 ans=!SvOK(res); break;
1337 return ans? &sv_yes: &sv_no;
1338 } else if (method==copy_amg) {
1340 croak("Copy method did not return a reference");
1342 return SvREFCNT_inc(SvRV(res));
1348 #endif /* OVERLOAD */