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#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "ppport.h"
/* This code was originally written by Goro Fuji for Class::MOP, and later
refined by Florian Ragwitz. */
static bool
check_version (pTHX_ SV *klass, SV *required_version) {
bool ret = 0;
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, 2);
PUSHs(klass);
PUSHs(required_version);
PUTBACK;
call_method("VERSION", G_DISCARD|G_VOID|G_EVAL);
SPAGAIN;
if (!SvTRUE(ERRSV)) {
ret = 1;
}
PUTBACK;
FREETMPS;
LEAVE;
return ret;
}
static bool
has_a_sub (pTHX_ HV *stash) {
HE *he;
(void)hv_iterinit(stash);
while ( (he = hv_iternext(stash)) ) {
GV * const gv = (GV*)HeVAL(he);
STRLEN keylen;
const char * const key = HePV(he, keylen);
SV *sv = NULL;
if(isGV(gv)){
sv = (SV *)GvCVu(gv);
}
/* expand the gv into a real typeglob if it contains stub functions or
constants. */
else {
gv_init(gv, stash, key, keylen, GV_ADDMULTI);
sv = (SV *)GvCV(gv);
}
if (sv) {
return TRUE;
}
}
return FALSE;
}
static SV* KEY_FOR__version;
static SV* KEY_FOR_VERSION;
static SV* KEY_FOR_ISA;
static U32 HASH_FOR__version;
static U32 HASH_FOR_VERSION;
static U32 HASH_FOR_ISA;
void
prehash_keys (pTHX) {
KEY_FOR__version = newSVpv("-version", 8);
KEY_FOR_VERSION = newSVpv("VERSION", 7);
KEY_FOR_ISA = newSVpv("ISA", 3);
PERL_HASH(HASH_FOR__version, "-version", 8);
PERL_HASH(HASH_FOR_VERSION, "VERSION", 7);
PERL_HASH(HASH_FOR_ISA, "ISA", 3);
}
MODULE = Class::Load::XS PACKAGE = Class::Load::XS
PROTOTYPES: DISABLE
BOOT:
prehash_keys(aTHX);
void
is_class_loaded(klass, options=NULL)
SV *klass
HV *options
PREINIT:
HV *stash;
bool found_method = FALSE;
PPCODE:
SvGETMAGIC(klass);
if (!(SvPOKp(klass) && SvCUR(klass))) { /* XXX: SvPOK does not work with magical scalars */
XSRETURN_NO;
}
stash = gv_stashsv(klass, 0);
if (!stash) {
XSRETURN_NO;
}
if (options && hv_exists_ent(options, KEY_FOR__version, HASH_FOR__version)) {
HE *required_version = hv_fetch_ent(options, KEY_FOR__version, 0, HASH_FOR__version);
if (check_version (aTHX_ klass, HeVAL(required_version))) {
XSRETURN_YES;
}
XSRETURN_NO;
}
if (hv_exists_ent (stash, KEY_FOR_VERSION, HASH_FOR_VERSION)) {
HE *version = hv_fetch_ent(stash, KEY_FOR_VERSION, 0, HASH_FOR_VERSION);
if (version) {
SV *value = HeVAL(version);
SV *version_sv;
if (value && isGV(value) && (version_sv = GvSV(value))) {
if (SvROK(version_sv)) {
/* Any object is good enough, though this is most
likely going to be a version object */
if (sv_isobject(version_sv)) {
XSRETURN_YES;
}
else {
SV *version_sv_ref = SvRV(version_sv);
if (SvOK(version_sv_ref)) {
XSRETURN_YES;
}
}
}
else if (SvOK(version_sv)) {
XSRETURN_YES;
}
}
}
}
if (hv_exists_ent (stash, KEY_FOR_ISA, HASH_FOR_ISA)) {
HE *isa = hv_fetch_ent(stash, KEY_FOR_ISA, 0, HASH_FOR_ISA);
if (isa) {
SV *value = HeVAL(isa);
if (value && isGV(value) && GvAV(value) && av_len(GvAV(value)) != -1) {
XSRETURN_YES;
}
}
}
if (has_a_sub(aTHX_ stash)) {
XSRETURN_YES;
}
XSRETURN_NO;
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