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,'
25 gv_AVadd(register GV *gv)
27 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
28 croak("Bad symbol for array");
35 gv_HVadd(register GV *gv)
37 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
38 croak("Bad symbol for hash");
45 gv_IOadd(register GV *gv)
47 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
48 croak("Bad symbol for filehandle");
55 gv_fetchfile(char *name)
63 tmplen = strlen(name) + 2;
64 if (tmplen < sizeof smallbuf)
67 New(603, tmpbuf, tmplen + 1, char);
70 strcpy(tmpbuf + 2, name);
71 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
73 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
74 if (tmpbuf != smallbuf)
76 sv_setpv(GvSV(gv), name);
77 if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm")))
80 hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
85 gv_init(GV *gv, HV *stash, char *name, STRLEN len, int multi)
89 bool doproto = SvTYPE(gv) > SVt_NULL;
90 char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL;
92 sv_upgrade((SV*)gv, SVt_PVGV);
101 Newz(602, gp, 1, GP);
102 GvGP(gv) = gp_ref(gp);
103 GvSV(gv) = NEWSV(72,0);
104 GvLINE(gv) = PL_curcop->cop_line;
105 GvFILEGV(gv) = PL_curcop->cop_filegv;
108 sv_magic((SV*)gv, (SV*)gv, '*', name, len);
109 GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
110 GvNAME(gv) = savepvn(name, len);
114 if (doproto) { /* Replicate part of newSUB here. */
117 start_subparse(0,0); /* Create CV in compcv. */
118 GvCV(gv) = PL_compcv;
122 CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv);
123 CvFILEGV(GvCV(gv)) = PL_curcop->cop_filegv;
124 CvSTASH(GvCV(gv)) = PL_curstash;
126 CvOWNER(GvCV(gv)) = 0;
127 if (!CvMUTEXP(GvCV(gv)))
128 New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex);
129 MUTEX_INIT(CvMUTEXP(GvCV(gv)));
130 #endif /* USE_THREADS */
132 sv_setpv((SV*)GvCV(gv), proto);
139 gv_init_sv(GV *gv, I32 sv_type)
155 gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level)
165 if ((level > 100) || (level < -100))
166 croak("Recursive inheritance detected while looking for method '%s' in package '%s'",
167 name, HvNAME(stash));
169 DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
171 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
176 if (SvTYPE(topgv) != SVt_PVGV)
177 gv_init(topgv, stash, name, len, TRUE);
178 if (cv = GvCV(topgv)) {
179 /* If genuine method or valid cache entry, use it */
180 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation)
182 /* Stale cached entry: junk it */
184 GvCV(topgv) = cv = Nullcv;
187 else if (GvCVGEN(topgv) == PL_sub_generation)
188 return 0; /* cache indicates sub doesn't exist */
191 gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE);
192 av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav;
194 /* create and re-create @.*::SUPER::ISA on demand */
195 if (!av || !SvMAGIC(av)) {
196 char* packname = HvNAME(stash);
197 STRLEN packlen = strlen(packname);
199 if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) {
203 basestash = gv_stashpvn(packname, packlen, TRUE);
204 gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
205 if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
206 dTHR; /* just for SvREFCNT_dec */
207 gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
208 if (!gvp || !(gv = *gvp))
209 croak("Cannot create %s::ISA", HvNAME(stash));
210 if (SvTYPE(gv) != SVt_PVGV)
211 gv_init(gv, stash, "ISA", 3, TRUE);
212 SvREFCNT_dec(GvAV(gv));
213 GvAV(gv) = (AV*)SvREFCNT_inc(av);
219 SV** svp = AvARRAY(av);
220 /* NOTE: No support for tied ISA */
221 I32 items = AvFILLp(av) + 1;
224 HV* basestash = gv_stashsv(sv, FALSE);
227 warn("Can't locate package %s for @%s::ISA",
228 SvPVX(sv), HvNAME(stash));
231 gv = gv_fetchmeth(basestash, name, len,
232 (level >= 0) ? level + 1 : level - 1);
238 /* if at top level, try UNIVERSAL */
240 if (level == 0 || level == -1) {
243 if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
244 if (gv = gv_fetchmeth(lastchance, name, len,
245 (level >= 0) ? level + 1 : level - 1)) {
248 * Cache method in topgv if:
249 * 1. topgv has no synonyms (else inheritance crosses wires)
250 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
253 GvREFCNT(topgv) == 1 &&
255 (CvROOT(cv) || CvXSUB(cv)))
257 if (cv = GvCV(topgv))
259 GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
260 GvCVGEN(topgv) = PL_sub_generation;
264 else if (topgv && GvREFCNT(topgv) == 1) {
265 /* cache the fact that the method is not defined */
266 GvCVGEN(topgv) = PL_sub_generation;
275 gv_fetchmethod(HV *stash, char *name)
277 return gv_fetchmethod_autoload(stash, name, TRUE);
281 gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload)
288 for (nend = name; *nend; nend++) {
291 else if (*nend == ':' && *(nend + 1) == ':')
295 char *origname = name;
299 if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
300 /* ->SUPER::method should really be looked up in original stash */
301 SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER",
302 HvNAME(PL_curcop->cop_stash)));
303 stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE);
304 DEBUG_o( deb("Treating %s as %s::%s\n",
305 origname, HvNAME(stash), name) );
308 stash = gv_stashpvn(origname, nsplit - origname, TRUE);
311 gv = gv_fetchmeth(stash, name, nend - name, 0);
313 if (strEQ(name,"import"))
314 gv = (GV*)&PL_sv_yes;
316 gv = gv_autoload4(stash, name, nend - name, TRUE);
320 if (!CvROOT(cv) && !CvXSUB(cv)) {
328 if (GvCV(stubgv) != cv) /* orphaned import */
331 autogv = gv_autoload4(GvSTASH(stubgv),
332 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
342 gv_autoload4(HV *stash, char *name, STRLEN len, I32 method)
344 static char autoload[] = "AUTOLOAD";
345 static STRLEN autolen = 8;
352 if (len == autolen && strnEQ(name, autoload, autolen))
354 if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
359 * Inheriting AUTOLOAD for non-methods works ... for now.
361 if (PL_dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash))
363 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
364 HvNAME(stash), (int)len, name);
367 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
368 * The subroutine's original name may not be "AUTOLOAD", so we don't
369 * use that, but for lack of anything better we will use the sub's
370 * original package to look up $AUTOLOAD.
372 varstash = GvSTASH(CvGV(cv));
373 vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
375 gv_init(vargv, varstash, autoload, autolen, FALSE);
377 sv_setpv(varsv, HvNAME(stash));
378 sv_catpvn(varsv, "::", 2);
379 sv_catpvn(varsv, name, len);
380 SvTAINTED_off(varsv);
385 gv_stashpv(char *name, I32 create)
387 return gv_stashpvn(name, strlen(name), create);
391 gv_stashpvn(char *name, U32 namelen, I32 create)
398 if (namelen + 3 < sizeof smallbuf)
401 New(606, tmpbuf, namelen + 3, char);
402 Copy(name,tmpbuf,namelen,char);
403 tmpbuf[namelen++] = ':';
404 tmpbuf[namelen++] = ':';
405 tmpbuf[namelen] = '\0';
406 tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
407 if (tmpbuf != smallbuf)
412 GvHV(tmpgv) = newHV();
415 HvNAME(stash) = savepv(name);
420 gv_stashsv(SV *sv, I32 create)
425 return gv_stashpvn(ptr, len, create);
430 gv_fetchpv(char *nambeg, I32 add, I32 sv_type)
433 register char *name = nambeg;
437 register char *namend;
441 if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
444 for (namend = name; *namend; namend++) {
445 if ((*namend == '\'' && namend[1]) ||
446 (*namend == ':' && namend[1] == ':'))
450 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
458 if (len + 3 < sizeof smallbuf)
461 New(601, tmpbuf, len+3, char);
462 Copy(name, tmpbuf, len, char);
466 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
467 gv = gvp ? *gvp : Nullgv;
468 if (gv && gv != (GV*)&PL_sv_undef) {
469 if (SvTYPE(gv) != SVt_PVGV)
470 gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
474 if (tmpbuf != smallbuf)
476 if (!gv || gv == (GV*)&PL_sv_undef)
479 if (!(stash = GvHV(gv)))
480 stash = GvHV(gv) = newHV();
483 HvNAME(stash) = savepvn(nambeg, namend - nambeg);
491 return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
498 /* No stash in name, so see how we can default */
501 if (isIDFIRST(*name)) {
504 if (isUPPER(*name)) {
506 if (*name == 'S' && (
507 strEQ(name, "SIG") ||
508 strEQ(name, "STDIN") ||
509 strEQ(name, "STDOUT") ||
510 strEQ(name, "STDERR") ))
513 else if (*name > 'E') {
514 if (*name == 'I' && strEQ(name, "INC"))
517 else if (*name > 'A') {
518 if (*name == 'E' && strEQ(name, "ENV"))
521 else if (*name == 'A' && (
522 strEQ(name, "ARGV") ||
523 strEQ(name, "ARGVOUT") ))
526 else if (*name == '_' && !name[1])
531 else if ((COP*)PL_curcop == &PL_compiling) {
533 if (add && (PL_hints & HINT_STRICT_VARS) &&
534 sv_type != SVt_PVCV &&
535 sv_type != SVt_PVGV &&
536 sv_type != SVt_PVFM &&
537 sv_type != SVt_PVIO &&
538 !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
540 gvp = (GV**)hv_fetch(stash,name,len,0);
542 *gvp == (GV*)&PL_sv_undef ||
543 SvTYPE(*gvp) != SVt_PVGV)
547 else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) ||
548 sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) ||
549 sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) )
551 warn("Variable \"%c%s\" is not imported",
552 sv_type == SVt_PVAV ? '@' :
553 sv_type == SVt_PVHV ? '%' : '$',
556 warn("(Did you mean &%s instead?)\n", name);
562 stash = PL_curcop->cop_stash;
568 /* By this point we should have a stash and a name */
573 if (add & ~GV_ADDMULTI) {
574 char sv_type_char = ((sv_type == SVt_PV) ? '$'
575 : (sv_type == SVt_PVAV) ? '@'
576 : (sv_type == SVt_PVHV) ? '%'
579 warn("Global symbol \"%c%s\" requires explicit package name",
582 warn("Global symbol \"%s\" requires explicit package name",
586 stash = PL_curstash ? PL_curstash : PL_defstash; /* avoid core dumps */
587 add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV
588 : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV
589 : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV
593 if (!SvREFCNT(stash)) /* symbol table under destruction */
596 gvp = (GV**)hv_fetch(stash,name,len,add);
597 if (!gvp || *gvp == (GV*)&PL_sv_undef)
600 if (SvTYPE(gv) == SVt_PVGV) {
603 gv_init_sv(gv, sv_type);
606 } else if (add & GV_NOINIT) {
610 /* Adding a new symbol */
612 if (add & GV_ADDWARN)
613 warn("Had to create %s unexpectedly", nambeg);
614 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
615 gv_init_sv(gv, sv_type);
616 GvFLAGS(gv) |= add_gvflags;
618 /* set up magic where warranted */
621 if (strEQ(name, "ARGV")) {
622 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
632 if (strnEQ(name, "EXPORT", 6))
636 if (strEQ(name, "ISA")) {
639 sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
640 /* NOTE: No support for tied ISA */
641 if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
642 && AvFILLp(av) == -1)
645 av_push(av, newSVpv(pname = "NDBM_File",0));
646 gv_stashpvn(pname, 9, TRUE);
647 av_push(av, newSVpv(pname = "DB_File",0));
648 gv_stashpvn(pname, 7, TRUE);
649 av_push(av, newSVpv(pname = "GDBM_File",0));
650 gv_stashpvn(pname, 9, TRUE);
651 av_push(av, newSVpv(pname = "SDBM_File",0));
652 gv_stashpvn(pname, 9, TRUE);
653 av_push(av, newSVpv(pname = "ODBM_File",0));
654 gv_stashpvn(pname, 9, TRUE);
660 if (strEQ(name, "OVERLOAD")) {
663 hv_magic(hv, gv, 'A');
666 #endif /* OVERLOAD */
668 if (strEQ(name, "SIG")) {
672 GvMULTI_on(PL_siggv);
673 hv = GvHVn(PL_siggv);
674 hv_magic(hv, PL_siggv, 'S');
675 for(i=1;sig_name[i];i++) {
677 init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1);
679 sv_setsv(*init,&PL_sv_undef);
690 PL_sawampersand = TRUE;
697 PL_sawampersand = TRUE;
704 PL_sawampersand = TRUE;
710 sv_setpv(GvSV(gv),PL_chopset);
716 #ifdef COMPLEX_STATUS
717 sv_upgrade(GvSV(gv), SVt_PVLV);
724 if (sv_type > SVt_PV && PL_curcop != &PL_compiling) {
725 HV* stash = gv_stashpvn("Errno",5,FALSE);
726 if(!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
729 perl_require_pv("Errno.pm");
731 stash = gv_stashpvn("Errno",5,FALSE);
732 if (!stash || !(gv_fetchmethod(stash, "TIEHASH")))
733 croak("Can't use %%! because Errno.pm is not available");
739 if (PL_dowarn && len == 1 && sv_type == SVt_PV)
740 warn("Use of $%s is deprecated", name);
783 SvREADONLY_on(GvSV(gv));
785 sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
791 sv_setpv(GvSV(gv),"\f");
792 PL_formfeed = GvSV(gv);
797 sv_setpv(GvSV(gv),"\034");
802 sv_upgrade(sv, SVt_PVNV);
803 sv_setpv(sv, PL_patchlevel);
813 gv_fullname3(SV *sv, GV *gv, char *prefix)
815 HV *hv = GvSTASH(gv);
820 sv_setpv(sv, prefix ? prefix : "");
821 sv_catpv(sv,HvNAME(hv));
822 sv_catpvn(sv,"::", 2);
823 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
827 gv_efullname3(SV *sv, GV *gv, char *prefix)
832 gv_fullname3(sv, egv, prefix);
835 /* XXX compatibility with versions <= 5.003. */
837 gv_fullname(SV *sv, GV *gv)
839 gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
842 /* XXX compatibility with versions <= 5.003. */
844 gv_efullname(SV *sv, GV *gv)
846 gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
856 io = (IO*)NEWSV(0,0);
857 sv_upgrade((SV *)io,SVt_PVIO);
860 iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
862 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
863 SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
879 for (i = 0; i <= (I32) HvMAX(stash); i++) {
880 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
881 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
882 (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
884 if (hv != PL_defstash)
885 gv_check(hv); /* nested package */
887 else if (isALPHA(*HeKEY(entry))) {
888 gv = (GV*)HeVAL(entry);
889 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
891 PL_curcop->cop_line = GvLINE(gv);
892 filegv = GvFILEGV(gv);
893 PL_curcop->cop_filegv = filegv;
894 if (filegv && GvMULTI(filegv)) /* Filename began with slash */
896 warn("Name \"%s::%s\" used only once: possible typo",
897 HvNAME(stash), GvNAME(gv));
906 return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)PL_gensym++),
910 /* hopefully this is only called on local symbol table entries */
918 /* multi-named GPs cannot be used for method cache */
919 SvREFCNT_dec(gp->gp_cv);
924 /* Adding a new name to a subroutine invalidates method cache */
937 if (!gv || !(gp = GvGP(gv)))
939 if (gp->gp_refcnt == 0) {
940 warn("Attempt to free unreferenced glob pointers");
944 /* Deleting the name of a subroutine invalidates method cache */
947 if (--gp->gp_refcnt > 0) {
948 if (gp->gp_egv == gv)
953 SvREFCNT_dec(gp->gp_sv);
954 SvREFCNT_dec(gp->gp_av);
955 SvREFCNT_dec(gp->gp_hv);
956 SvREFCNT_dec(gp->gp_io);
957 SvREFCNT_dec(gp->gp_cv);
958 SvREFCNT_dec(gp->gp_form);
964 #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
968 #ifdef MICROPORT /* Microport 2.4 hack */
973 return GvGP(gv)->gp_av;
975 return GvGP(gv_AVadd(gv))->gp_av;
982 return GvGP(gv)->gp_hv;
984 return GvGP(gv_HVadd(gv))->gp_hv;
986 #endif /* Microport 2.4 hack */
989 /* Updates and caches the CV's */
992 Gv_AMupdate(HV *stash)
999 MAGIC* mg=mg_find((SV*)stash,'c');
1000 AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
1003 if (mg && amtp->was_ok_am == PL_amagic_generation
1004 && amtp->was_ok_sub == PL_sub_generation)
1005 return AMT_AMAGIC(amtp);
1006 if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
1008 for (i=1; i<NofAMmeth; i++) {
1009 if (amtp->table[i]) {
1010 SvREFCNT_dec(amtp->table[i]);
1014 sv_unmagic((SV*)stash, 'c');
1016 DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
1018 amt.was_ok_am = PL_amagic_generation;
1019 amt.was_ok_sub = PL_sub_generation;
1020 amt.fallback = AMGfallNO;
1023 #ifdef OVERLOAD_VIA_HASH
1024 gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
1025 if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) {
1032 /* Work with "fallback" key, which we assume to be first in AMG_names */
1034 if (( cp = (char *)AMG_names[0] ) &&
1035 (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
1036 if (SvTRUE(sv)) amt.fallback=AMGfallYES;
1037 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
1039 for (i = 1; i < NofAMmeth; i++) {
1041 cp = (char *)AMG_names[i];
1043 svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
1044 if (svp && ((sv = *svp) != &PL_sv_undef)) {
1045 switch (SvTYPE(sv)) {
1048 if (!SvOK(sv)) break;
1049 gv = gv_fetchmethod(stash, SvPV(sv, PL_na));
1050 if (gv) cv = GvCV(gv);
1054 if (SvTYPE(cv) == SVt_PVCV)
1059 croak("Not a subroutine reference in overload table");
1065 if (!(cv = GvCVu((GV*)sv)))
1066 cv = sv_2cv(sv, &stash, &gv, TRUE);
1071 croak("Method for operation %s not found in package %.256s during blessing\n",
1084 /* Work with "fallback" key, which we assume to be first in AMG_names */
1086 if ( cp = AMG_names[0] ) {
1087 /* Try to find via inheritance. */
1088 gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */
1089 if (gv) sv = GvSV(gv);
1091 if (!gv) goto no_table;
1092 else if (SvTRUE(sv)) amt.fallback=AMGfallYES;
1093 else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
1096 for (i = 1; i < NofAMmeth; i++) {
1097 SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i]));
1098 DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n",
1099 cp, HvNAME(stash)) );
1100 /* don't fill the cache while looking up! */
1101 gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1);
1103 if(gv && (cv = GvCV(gv))) {
1104 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1105 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
1106 /* GvSV contains the name of the method. */
1109 DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
1110 SvPV(GvSV(gv), PL_na), cp, HvNAME(stash)) );
1111 if (!SvPOK(GvSV(gv))
1112 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)),
1115 /* Can be an import stub (created by `can'). */
1117 croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
1118 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1121 croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'",
1122 (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
1125 cv = GvCV(gv = ngv);
1127 DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
1128 cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
1129 GvNAME(CvGV(cv))) );
1133 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1136 AMT_AMAGIC_on(&amt);
1137 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
1141 /* Here we have no table: */
1143 AMT_AMAGIC_off(&amt);
1144 sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
1149 amagic_call(SV *left, SV *right, int method, int flags)
1154 CV **cvp=NULL, **ocvp=NULL;
1156 int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
1157 int postpr=0, inc_dec_ass=0, assignshift=assign?1:0;
1159 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1160 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
1161 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1162 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1164 && ((cv = cvp[off=method+assignshift])
1165 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1167 (fl = 1, cv = cvp[off=method])))) {
1168 lr = -1; /* Call method for left argument */
1170 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1173 /* look for substituted methods */
1176 if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1))
1177 || ((cv = cvp[off=add_amg]) && (postpr=1))) {
1178 right = &PL_sv_yes; lr = -1; assign = 1;
1182 if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1))
1183 || ((cv = cvp[off=subtr_amg]) && (postpr=1))) {
1184 right = &PL_sv_yes; lr = -1; assign = 1;
1188 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1191 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1194 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1197 (void)((cv = cvp[off=bool__amg])
1198 || (cv = cvp[off=numer_amg])
1199 || (cv = cvp[off=string_amg]));
1205 * SV* ref causes confusion with the interpreter variable of
1208 SV* tmpRef=SvRV(left);
1209 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
1211 * Just to be extra cautious. Maybe in some
1212 * additional cases sv_setsv is safe, too.
1214 SV* newref = newSVsv(tmpRef);
1215 SvOBJECT_on(newref);
1216 SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef));
1222 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1223 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1224 SV* nullsv=sv_2mortal(newSViv(0));
1226 SV* lessp = amagic_call(left,nullsv,
1227 lt_amg,AMGf_noright);
1228 logic = SvTRUE(lessp);
1230 SV* lessp = amagic_call(left,nullsv,
1231 ncmp_amg,AMGf_noright);
1232 logic = (SvNV(lessp) < 0);
1235 if (off==subtr_amg) {
1246 if (cv = cvp[off=subtr_amg]) {
1248 left = sv_2mortal(newSViv(0));
1255 if (!cv) goto not_found;
1256 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1257 && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c'))
1258 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1259 ? (amtp = (AMT*)mg->mg_ptr)->table
1261 && (cv = cvp[off=method])) { /* Method for right
1264 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1265 && (cvp=ocvp) && (lr = -1))
1266 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1267 && !(flags & AMGf_unary)) {
1268 /* We look for substitution for
1269 * comparison operations and
1271 if (method==concat_amg || method==concat_ass_amg
1272 || method==repeat_amg || method==repeat_ass_amg) {
1273 return NULL; /* Delegate operation to string conversion */
1283 postpr = 1; off=ncmp_amg; break;
1290 postpr = 1; off=scmp_amg; break;
1292 if (off != -1) cv = cvp[off];
1297 not_found: /* No method found, either report or croak */
1298 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1299 notfound = 1; lr = -1;
1300 } else if (cvp && (cv=cvp[nomethod_amg])) {
1301 notfound = 1; lr = 1;
1304 if (off==-1) off=method;
1305 msg = sv_2mortal(newSVpvf(
1306 "Operation `%s': no method found,%sargument %s%s%s%s",
1307 AMG_names[method + assignshift],
1308 (flags & AMGf_unary ? " " : "\n\tleft "),
1310 "in overloaded package ":
1311 "has no overloaded magic",
1313 HvNAME(SvSTASH(SvRV(left))):
1316 ",\n\tright argument in overloaded package ":
1319 : ",\n\tright argument has no overloaded magic"),
1321 HvNAME(SvSTASH(SvRV(right))):
1323 if (amtp && amtp->fallback >= AMGfallYES) {
1324 DEBUG_o( deb("%s", SvPVX(msg)) );
1334 "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
1336 method+assignshift==off? "" :
1338 method+assignshift==off? "" :
1339 AMG_names[method+assignshift],
1340 method+assignshift==off? "" : "')",
1341 flags & AMGf_unary? "" :
1342 lr==1 ? " for right argument": " for left argument",
1343 flags & AMGf_unary? " for argument" : "",
1345 fl? ",\n\tassignment variant used": "") );
1346 /* Since we use shallow copy during assignment, we need
1347 * to dublicate the contents, probably calling user-supplied
1348 * version of copy operator
1350 if ((method + assignshift==off
1351 && (assign || method==inc_amg || method==dec_amg))
1352 || inc_dec_ass) RvDEEPCP(left);
1358 bool oldcatch = CATCH_GET;
1361 Zero(&myop, 1, BINOP);
1362 myop.op_last = (OP *) &myop;
1363 myop.op_next = Nullop;
1364 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
1366 PUSHSTACKi(PERLSI_OVERLOAD);
1369 PL_op = (OP *) &myop;
1370 if (PERLDB_SUB && PL_curstash != PL_debstash)
1371 PL_op->op_private |= OPpENTERSUB_DB;
1375 EXTEND(SP, notfound + 5);
1376 PUSHs(lr>0? right: left);
1377 PUSHs(lr>0? left: right);
1378 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
1380 PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) );
1385 if (PL_op = pp_entersub(ARGS))
1392 CATCH_SET(oldcatch);
1399 ans=SvIV(res)<=0; break;
1402 ans=SvIV(res)<0; break;
1405 ans=SvIV(res)>=0; break;
1408 ans=SvIV(res)>0; break;
1411 ans=SvIV(res)==0; break;
1414 ans=SvIV(res)!=0; break;
1417 SvSetSV(left,res); return left;
1419 ans=!SvOK(res); break;
1422 } else if (method==copy_amg) {
1424 croak("Copy method did not return a reference");
1426 return SvREFCNT_inc(SvRV(res));
1432 #endif /* OVERLOAD */