forked from schacon/perl
/
gv.c
1354 lines (1255 loc) · 30.9 KB
/
gv.c
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/* gv.c
*
* Copyright (c) 1991-1994, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
* of your inquisitiveness, I shall spend all the rest of my days answering
* you. What more do you want to know?'
* 'The names of all the stars, and of all living things, and the whole
* history of Middle-earth and Over-heaven and of the Sundering Seas,'
* laughed Pippin.
*/
#include "EXTERN.h"
#include "perl.h"
EXT char rcsid[];
GV *
gv_AVadd(gv)
register GV *gv;
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
croak("Bad symbol for array");
if (!GvAV(gv))
GvAV(gv) = newAV();
return gv;
}
GV *
gv_HVadd(gv)
register GV *gv;
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
croak("Bad symbol for hash");
if (!GvHV(gv))
GvHV(gv) = newHV();
return gv;
}
GV *
gv_IOadd(gv)
register GV *gv;
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
croak("Bad symbol for filehandle");
if (!GvIOp(gv))
GvIOp(gv) = newIO();
return gv;
}
GV *
gv_fetchfile(name)
char *name;
{
char tmpbuf[1200];
STRLEN tmplen;
GV *gv;
sprintf(tmpbuf, "_<%s", name);
tmplen = strlen(tmpbuf);
gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE);
if (!isGV(gv))
gv_init(gv, defstash, tmpbuf, tmplen, FALSE);
sv_setpv(GvSV(gv), name);
if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm")))
GvMULTI_on(gv);
if (perldb)
hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
return gv;
}
void
gv_init(gv, stash, name, len, multi)
GV *gv;
HV *stash;
char *name;
STRLEN len;
int multi;
{
register GP *gp;
sv_upgrade((SV*)gv, SVt_PVGV);
if (SvLEN(gv))
Safefree(SvPVX(gv));
Newz(602, gp, 1, GP);
GvGP(gv) = gp_ref(gp);
GvSV(gv) = NEWSV(72,0);
GvLINE(gv) = curcop->cop_line;
GvFILEGV(gv) = curcop->cop_filegv;
GvEGV(gv) = gv;
sv_magic((SV*)gv, (SV*)gv, '*', name, len);
GvSTASH(gv) = stash;
GvNAME(gv) = savepvn(name, len);
GvNAMELEN(gv) = len;
if (multi)
GvMULTI_on(gv);
}
static void
gv_init_sv(gv, sv_type)
GV* gv;
I32 sv_type;
{
switch (sv_type) {
case SVt_PVIO:
(void)GvIOn(gv);
break;
case SVt_PVAV:
(void)GvAVn(gv);
break;
case SVt_PVHV:
(void)GvHVn(gv);
break;
}
}
GV *
gv_fetchmeth(stash, name, len, level)
HV* stash;
char* name;
STRLEN len;
I32 level;
{
AV* av;
GV* topgv;
GV* gv;
GV** gvp;
HV* lastchance;
CV* cv;
if (!stash)
return 0;
if ((level > 100) || (level < -100))
croak("Recursive inheritance detected");
DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
if (!gvp)
topgv = Nullgv;
else {
topgv = *gvp;
if (SvTYPE(topgv) != SVt_PVGV)
gv_init(topgv, stash, name, len, TRUE);
if (cv = GvCV(topgv)) {
/* If genuine method or valid cache entry, use it */
if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation)
return topgv;
/* Stale cached entry: junk it */
SvREFCNT_dec(cv);
GvCV(topgv) = cv = Nullcv;
GvCVGEN(topgv) = 0;
}
}
gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
SV** svp = AvARRAY(av);
I32 items = AvFILL(av) + 1;
while (items--) {
SV* sv = *svp++;
HV* basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
if (dowarn)
warn("Can't locate package %s for @%s::ISA",
SvPVX(sv), HvNAME(stash));
continue;
}
gv = gv_fetchmeth(basestash, name, len,
(level >= 0) ? level + 1 : level - 1);
if (gv)
goto gotcha;
}
}
if (level == 0 || level == -1) {
if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
if (gv = gv_fetchmeth(lastchance, name, len,
(level >= 0) ? level + 1 : level - 1)) {
gotcha:
/* Use topgv for cache only if it has no synonyms */
if (topgv && GvREFCNT(topgv) == 1) {
if (cv = GvCV(topgv))
SvREFCNT_dec(cv);
GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
GvCVGEN(topgv) = sub_generation;
}
return gv;
}
}
}
return 0;
}
GV *
gv_fetchmethod(stash, name)
HV* stash;
char* name;
{
register char *nend;
char *nsplit = 0;
GV* gv;
for (nend = name; *nend; nend++) {
if (*nend == ':' || *nend == '\'')
nsplit = nend;
}
if (nsplit) {
char ch;
char *origname = name;
name = nsplit + 1;
ch = *nsplit;
if (*nsplit == ':')
--nsplit;
*nsplit = '\0';
if (strEQ(origname,"SUPER")) {
/* Degenerate case ->SUPER::method should really lookup in original stash */
SV *tmpstr = sv_2mortal(newSVpv(HvNAME(curcop->cop_stash),0));
sv_catpvn(tmpstr, "::SUPER", 7);
stash = gv_stashpvn(SvPVX(tmpstr),SvCUR(tmpstr),TRUE);
*nsplit = ch;
DEBUG_o( deb("Treating %s as %s::%s\n",origname,HvNAME(stash),name) );
} else {
stash = gv_stashpvn(origname, nsplit - origname, TRUE);
*nsplit = ch;
}
}
gv = gv_fetchmeth(stash, name, nend - name, 0);
if (!gv) {
/* Failed obvious case - look for SUPER as last element of stash's name */
char *packname = HvNAME(stash);
STRLEN len = strlen(packname);
if (len >= 7 && strEQ(packname+len-7,"::SUPER")) {
/* Now look for @.*::SUPER::ISA */
GV** gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
len -= 7;
if (!gvp || (gv = *gvp) == (GV*)&sv_undef || !GvAV(gv)) {
/* No @ISA in package ending in ::SUPER - drop suffix
and see if there is an @ISA there
*/
HV *basestash;
char ch = packname[len];
AV *av;
packname[len] = '\0';
basestash = gv_stashpvn(packname, len, TRUE);
packname[len] = ch;
gvp = (GV**)hv_fetch(basestash,"ISA",3,FALSE);
if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
/* Okay found @ISA after dropping the SUPER, alias it */
SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0));
sv_catpvn(tmpstr, "::ISA", 5);
gv = gv_fetchpv(SvPV(tmpstr,na),TRUE,SVt_PVGV);
if (gv) {
GvAV(gv) = (AV*)SvREFCNT_inc(av);
/* ... and re-try lookup */
gv = gv_fetchmeth(stash, name, nend - name, 0);
} else {
croak("Cannot create %s::ISA",HvNAME(stash));
}
}
}
}
}
if (!gv) {
if (strEQ(name,"import"))
gv = (GV*)&sv_yes;
else
gv = gv_autoload(stash, name, nend - name);
}
return gv;
}
GV*
gv_autoload(stash, name, len)
HV* stash;
char* name;
STRLEN len;
{
static char autoload[] = "AUTOLOAD";
static STRLEN autolen = 8;
GV* gv;
CV* cv;
HV* varstash;
GV* vargv;
SV* varsv;
if (len == autolen && strnEQ(name, autoload, autolen))
return Nullgv;
if (!(gv = gv_fetchmeth(stash, autoload, autolen, 0)))
return Nullgv;
cv = GvCV(gv);
/*
* Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
* The subroutine's original name may not be "AUTOLOAD", so we don't
* use that, but for lack of anything better we will use the sub's
* original package to look up $AUTOLOAD.
*/
varstash = GvSTASH(CvGV(cv));
vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
if (!isGV(vargv))
gv_init(vargv, varstash, autoload, autolen, FALSE);
varsv = GvSV(vargv);
sv_setpv(varsv, HvNAME(stash));
sv_catpvn(varsv, "::", 2);
sv_catpvn(varsv, name, len);
SvTAINTED_off(varsv);
return gv;
}
HV*
gv_stashpv(name,create)
char *name;
I32 create;
{
return gv_stashpvn(name, strlen(name), create);
}
HV*
gv_stashpvn(name,namelen,create)
char *name;
U32 namelen;
I32 create;
{
char tmpbuf[1203];
HV *stash;
GV *tmpgv;
if (namelen > 1200) {
namelen = 1200;
#ifdef VMS
warn("Weird package name \"%s\" truncated", name);
#else
warn("Weird package name \"%.*s...\" truncated", namelen, name);
#endif
}
Copy(name,tmpbuf,namelen,char);
tmpbuf[namelen++] = ':';
tmpbuf[namelen++] = ':';
tmpbuf[namelen] = '\0';
tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV);
if (!tmpgv)
return 0;
if (!GvHV(tmpgv))
GvHV(tmpgv) = newHV();
stash = GvHV(tmpgv);
if (!HvNAME(stash))
HvNAME(stash) = savepv(name);
return stash;
}
HV*
gv_stashsv(sv,create)
SV *sv;
I32 create;
{
register char *ptr;
STRLEN len;
ptr = SvPV(sv,len);
return gv_stashpvn(ptr, len, create);
}
GV *
gv_fetchpv(nambeg,add,sv_type)
char *nambeg;
I32 add;
I32 sv_type;
{
register char *name = nambeg;
register GV *gv = 0;
GV**gvp;
I32 len;
register char *namend;
HV *stash = 0;
bool global = FALSE;
char *tmpbuf;
if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
name++;
for (namend = name; *namend; namend++) {
if ((*namend == '\'' && namend[1]) ||
(*namend == ':' && namend[1] == ':'))
{
if (!stash)
stash = defstash;
if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
return Nullgv;
len = namend - name;
if (len > 0) {
New(601, tmpbuf, len+3, char);
Copy(name, tmpbuf, len, char);
tmpbuf[len++] = ':';
tmpbuf[len++] = ':';
tmpbuf[len] = '\0';
gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
Safefree(tmpbuf);
if (!gvp || *gvp == (GV*)&sv_undef)
return Nullgv;
gv = *gvp;
if (SvTYPE(gv) == SVt_PVGV)
GvMULTI_on(gv);
else if (!add)
return Nullgv;
else
gv_init(gv, stash, nambeg, namend - nambeg, (add & 2));
if (!(stash = GvHV(gv)))
stash = GvHV(gv) = newHV();
if (!HvNAME(stash))
HvNAME(stash) = savepvn(nambeg, namend - nambeg);
}
if (*namend == ':')
namend++;
namend++;
name = namend;
if (!*name)
return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE);
}
}
len = namend - name;
if (!len)
len = 1;
/* No stash in name, so see how we can default */
if (!stash) {
if (isIDFIRST(*name)) {
if (isUPPER(*name)) {
if (*name > 'I') {
if (*name == 'S' && (
strEQ(name, "SIG") ||
strEQ(name, "STDIN") ||
strEQ(name, "STDOUT") ||
strEQ(name, "STDERR") ))
global = TRUE;
}
else if (*name > 'E') {
if (*name == 'I' && strEQ(name, "INC"))
global = TRUE;
}
else if (*name > 'A') {
if (*name == 'E' && strEQ(name, "ENV"))
global = TRUE;
}
else if (*name == 'A' && (
strEQ(name, "ARGV") ||
strEQ(name, "ARGVOUT") ))
global = TRUE;
}
else if (*name == '_' && !name[1])
global = TRUE;
if (global)
stash = defstash;
else if ((COP*)curcop == &compiling) {
stash = curstash;
if (add && (hints & HINT_STRICT_VARS) &&
sv_type != SVt_PVCV &&
sv_type != SVt_PVGV &&
sv_type != SVt_PVFM &&
sv_type != SVt_PVIO &&
!(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
{
gvp = (GV**)hv_fetch(stash,name,len,0);
if (!gvp ||
*gvp == (GV*)&sv_undef ||
SvTYPE(*gvp) != SVt_PVGV)
{
stash = 0;
}
else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) ||
sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) ||
sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) )
{
warn("Variable \"%c%s\" is not imported",
sv_type == SVt_PVAV ? '@' :
sv_type == SVt_PVHV ? '%' : '$',
name);
if (GvCVu(*gvp))
warn("(Did you mean &%s instead?)\n", name);
stash = 0;
}
}
}
else
stash = curcop->cop_stash;
}
else
stash = defstash;
}
/* By this point we should have a stash and a name */
if (!stash) {
if (add) {
warn("Global symbol \"%s\" requires explicit package name", name);
++error_count;
stash = curstash ? curstash : defstash; /* avoid core dumps */
}
else
return Nullgv;
}
if (!SvREFCNT(stash)) /* symbol table under destruction */
return Nullgv;
gvp = (GV**)hv_fetch(stash,name,len,add);
if (!gvp || *gvp == (GV*)&sv_undef)
return Nullgv;
gv = *gvp;
if (SvTYPE(gv) == SVt_PVGV) {
if (add) {
GvMULTI_on(gv);
gv_init_sv(gv, sv_type);
}
return gv;
}
/* Adding a new symbol */
if (add & 4)
warn("Had to create %s unexpectedly", nambeg);
gv_init(gv, stash, name, len, add & 2);
gv_init_sv(gv, sv_type);
/* set up magic where warranted */
switch (*name) {
case 'A':
if (strEQ(name, "ARGV")) {
IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
}
break;
case 'a':
case 'b':
if (len == 1)
GvMULTI_on(gv);
break;
case 'E':
if (strnEQ(name, "EXPORT", 6))
GvMULTI_on(gv);
break;
case 'I':
if (strEQ(name, "ISA")) {
AV* av = GvAVn(gv);
GvMULTI_on(gv);
sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1)
{
char *pname;
av_push(av, newSVpv(pname = "NDBM_File",0));
gv_stashpvn(pname, 9, TRUE);
av_push(av, newSVpv(pname = "DB_File",0));
gv_stashpvn(pname, 7, TRUE);
av_push(av, newSVpv(pname = "GDBM_File",0));
gv_stashpvn(pname, 9, TRUE);
av_push(av, newSVpv(pname = "SDBM_File",0));
gv_stashpvn(pname, 9, TRUE);
av_push(av, newSVpv(pname = "ODBM_File",0));
gv_stashpvn(pname, 9, TRUE);
}
}
break;
#ifdef OVERLOAD
case 'O':
if (strEQ(name, "OVERLOAD")) {
HV* hv = GvHVn(gv);
GvMULTI_on(gv);
sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0);
}
break;
#endif /* OVERLOAD */
case 'S':
if (strEQ(name, "SIG")) {
HV *hv;
I32 i;
siggv = gv;
GvMULTI_on(siggv);
hv = GvHVn(siggv);
hv_magic(hv, siggv, 'S');
for(i=1;sig_name[i];i++) {
SV ** init;
init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1);
if(init)
sv_setsv(*init,&sv_undef);
psig_ptr[i] = 0;
psig_name[i] = 0;
}
/* initialize signal stack */
signalstack = newAV();
AvREAL_off(signalstack);
av_extend(signalstack, 30);
av_fill(signalstack, 0);
}
break;
case '&':
if (len > 1)
break;
ampergv = gv;
sawampersand = TRUE;
goto ro_magicalize;
case '`':
if (len > 1)
break;
leftgv = gv;
sawampersand = TRUE;
goto ro_magicalize;
case '\'':
if (len > 1)
break;
rightgv = gv;
sawampersand = TRUE;
goto ro_magicalize;
case ':':
if (len > 1)
break;
sv_setpv(GvSV(gv),chopset);
goto magicalize;
case '#':
case '*':
if (dowarn && len == 1 && sv_type == SVt_PV)
warn("Use of $%s is deprecated", name);
/* FALL THROUGH */
case '[':
case '!':
case '?':
case '^':
case '~':
case '=':
case '-':
case '%':
case '.':
case '(':
case ')':
case '<':
case '>':
case ',':
case '\\':
case '/':
case '|':
case '\001':
case '\004':
case '\005':
case '\006':
case '\010':
case '\017':
case '\t':
case '\020':
case '\024':
case '\027':
if (len > 1)
break;
goto magicalize;
case '+':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
ro_magicalize:
SvREADONLY_on(GvSV(gv));
magicalize:
sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
break;
case '\014':
if (len > 1)
break;
sv_setpv(GvSV(gv),"\f");
formfeed = GvSV(gv);
break;
case ';':
if (len > 1)
break;
sv_setpv(GvSV(gv),"\034");
break;
case ']':
if (len == 1) {
SV *sv;
sv = GvSV(gv);
sv_upgrade(sv, SVt_PVNV);
sv_setpv(sv, patchlevel);
}
break;
}
return gv;
}
void
gv_fullname3(sv, gv, prefix)
SV *sv;
GV *gv;
char *prefix;
{
HV *hv = GvSTASH(gv);
if (!hv) {
SvOK_off(sv);
return;
}
sv_setpv(sv, prefix ? prefix : "");
sv_catpv(sv,HvNAME(hv));
sv_catpvn(sv,"::", 2);
sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
}
void
gv_efullname3(sv, gv, prefix)
SV *sv;
GV *gv;
char *prefix;
{
GV *egv = GvEGV(gv);
if (!egv)
egv = gv;
gv_fullname3(sv, egv, prefix);
}
/* XXX compatibility with versions <= 5.003. */
void
gv_fullname(sv,gv)
SV *sv;
GV *gv;
{
gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
}
/* XXX compatibility with versions <= 5.003. */
void
gv_efullname(sv,gv)
SV *sv;
GV *gv;
{
gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
}
IO *
newIO()
{
IO *io;
GV *iogv;
io = (IO*)NEWSV(0,0);
sv_upgrade((SV *)io,SVt_PVIO);
SvREFCNT(io) = 1;
SvOBJECT_on(io);
iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
return io;
}
void
gv_check(stash)
HV* stash;
{
register HE *entry;
register I32 i;
register GV *gv;
HV *hv;
GV *filegv;
if (!HvARRAY(stash))
return;
for (i = 0; i <= (I32) HvMAX(stash); i++) {
for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
(gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
{
if (hv != defstash)
gv_check(hv); /* nested package */
}
else if (isALPHA(*HeKEY(entry))) {
gv = (GV*)HeVAL(entry);
if (GvMULTI(gv))
continue;
curcop->cop_line = GvLINE(gv);
filegv = GvFILEGV(gv);
curcop->cop_filegv = filegv;
if (filegv && GvMULTI(filegv)) /* Filename began with slash */
continue;
warn("Name \"%s::%s\" used only once: possible typo",
HvNAME(stash), GvNAME(gv));
}
}
}
}
GV *
newGVgen(pack)
char *pack;
{
(void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++);
return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV);
}
/* hopefully this is only called on local symbol table entries */
GP*
gp_ref(gp)
GP* gp;
{
gp->gp_refcnt++;
if (gp->gp_cv) {
if (gp->gp_cvgen) {
/* multi-named GPs cannot be used for method cache */
SvREFCNT_dec(gp->gp_cv);
gp->gp_cv = Nullcv;
gp->gp_cvgen = 0;
}
else {
/* Adding a new name to a subroutine invalidates method cache */
sub_generation++;
}
}
return gp;
}
void
gp_free(gv)
GV* gv;
{
GP* gp;
CV* cv;
if (!gv || !(gp = GvGP(gv)))
return;
if (gp->gp_refcnt == 0) {
warn("Attempt to free unreferenced glob pointers");
return;
}
if (gp->gp_cv) {
/* Deleting the name of a subroutine invalidates method cache */
sub_generation++;
}
if (--gp->gp_refcnt > 0) {
if (gp->gp_egv == gv)
gp->gp_egv = 0;
return;
}
SvREFCNT_dec(gp->gp_sv);
SvREFCNT_dec(gp->gp_av);
SvREFCNT_dec(gp->gp_hv);
SvREFCNT_dec(gp->gp_io);
SvREFCNT_dec(gp->gp_cv);
SvREFCNT_dec(gp->gp_form);
Safefree(gp);
GvGP(gv) = 0;
}
#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
#define MICROPORT
#endif
#ifdef MICROPORT /* Microport 2.4 hack */
AV *GvAVn(gv)
register GV *gv;
{
if (GvGP(gv)->gp_av)
return GvGP(gv)->gp_av;
else
return GvGP(gv_AVadd(gv))->gp_av;
}
HV *GvHVn(gv)
register GV *gv;
{
if (GvGP(gv)->gp_hv)
return GvGP(gv)->gp_hv;
else
return GvGP(gv_HVadd(gv))->gp_hv;
}
#endif /* Microport 2.4 hack */
#ifdef OVERLOAD
/* Updates and caches the CV's */
bool
Gv_AMupdate(stash)
HV* stash;
{
GV** gvp;
HV* hv;
GV* gv;
CV* cv;
MAGIC* mg=mg_find((SV*)stash,'c');
AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL;
AMT amt;
if (mg && amtp->was_ok_am == amagic_generation
&& amtp->was_ok_sub == sub_generation)
return AMT_AMAGIC(amtp);
if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
int i;
for (i=1; i<NofAMmeth; i++) {
if (amtp->table[i]) {
SvREFCNT_dec(amtp->table[i]);
}
}
}
sv_unmagic((SV*)stash, 'c');
DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
amt.was_ok_am = amagic_generation;
amt.was_ok_sub = sub_generation;
amt.fallback = AMGfallNO;
amt.flags = 0;
#ifdef OVERLOAD_VIA_HASH
gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) {
int filled=0;
int i;
char *cp;
SV* sv;
SV** svp;
/* Work with "fallback" key, which we assume to be first in AMG_names */
if (( cp = (char *)AMG_names[0] ) &&
(svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
if (SvTRUE(sv)) amt.fallback=AMGfallYES;
else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
}
for (i = 1; i < NofAMmeth; i++) {
cv = 0;
cp = (char *)AMG_names[i];
svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
if (svp && ((sv = *svp) != &sv_undef)) {
switch (SvTYPE(sv)) {
default:
if (!SvROK(sv)) {
if (!SvOK(sv)) break;
gv = gv_fetchmethod(stash, SvPV(sv, na));
if (gv) cv = GvCV(gv);
break;
}
cv = (CV*)SvRV(sv);
if (SvTYPE(cv) == SVt_PVCV)
break;
/* FALL THROUGH */
case SVt_PVHV:
case SVt_PVAV:
croak("Not a subroutine reference in overload table");
return FALSE;
case SVt_PVCV:
cv = (CV*)sv;
break;
case SVt_PVGV:
if (!(cv = GvCVu((GV*)sv)))
cv = sv_2cv(sv, &stash, &gv, TRUE);
break;
}
if (cv) filled=1;
else {
croak("Method for operation %s not found in package %.256s during blessing\n",
cp,HvNAME(stash));
return FALSE;
}
}
#else
{
int filled = 0;
int i;
char *cp;
SV* sv = NULL;
SV** svp;
/* Work with "fallback" key, which we assume to be first in AMG_names */
if ( cp = (char *)AMG_names[0] ) {
/* Try to find via inheritance. */
gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */