--- /dev/null
+#include "mop.h"
+
+void
+mop_call_xs (pTHX_ XSPROTO(subaddr), CV *cv, SV **mark)
+{
+ dSP;
+ PUSHMARK(mark);
+ (*subaddr)(aTHX_ cv);
+ PUTBACK;
+}
+
+#if PERL_VERSION >= 10
+UV
+mop_check_package_cache_flag (pTHX_ HV *stash)
+{
+ assert(SvTYPE(stash) == SVt_PVHV);
+
+ /* here we're trying to implement a c version of mro::get_pkg_gen($stash),
+ * however the perl core doesn't make it easy for us. It doesn't provide an
+ * api that just does what we want.
+ *
+ * However, we know that the information we want is, inside the core,
+ * available using HvMROMETA(stash)->pkg_gen. Unfortunately, although the
+ * HvMROMETA macro is public, it is implemented using Perl_mro_meta_init,
+ * which is not public and only available inside the core, as the mro
+ * interface as well as the structure returned by mro_meta_init isn't
+ * considered to be stable yet.
+ *
+ * Perl_mro_meta_init isn't declared static, so we could just define it
+ * ourselfs if perls headers don't do that for us, except that won't work
+ * on platforms where symbols need to be explicitly exported when linking
+ * shared libraries.
+ *
+ * So our, hopefully temporary, solution is to be even more evil and
+ * basically reimplement HvMROMETA in a very fragile way that'll blow up
+ * when the relevant parts of the mro implementation in core change.
+ *
+ * :-(
+ *
+ */
+
+ return HvAUX(stash)->xhv_mro_meta
+ ? HvAUX(stash)->xhv_mro_meta->pkg_gen
+ : 0;
+}
+
+#else /* pre 5.10.0 */
+
+UV
+mop_check_package_cache_flag (pTHX_ HV *stash)
+{
+ PERL_UNUSED_ARG(stash);
+ assert(SvTYPE(stash) == SVt_PVHV);
+
+ return PL_sub_generation;
+}
+#endif
+
+SV *
+mop_call0 (pTHX_ SV *const self, SV *const method)
+{
+ dSP;
+ SV *ret;
+
+ PUSHMARK(SP);
+ XPUSHs(self);
+ PUTBACK;
+
+ call_sv(method, G_SCALAR | G_METHOD);
+
+ SPAGAIN;
+ ret = POPs;
+ PUTBACK;
+
+ return ret;
+}
+
+int
+mop_get_code_info (SV *coderef, char **pkg, char **name)
+{
+ if (!SvOK(coderef) || !SvROK(coderef) || SvTYPE(SvRV(coderef)) != SVt_PVCV) {
+ return 0;
+ }
+
+ coderef = SvRV(coderef);
+
+ /* sub is still being compiled */
+ if (!CvGV(coderef)) {
+ return 0;
+ }
+
+ /* I think this only gets triggered with a mangled coderef, but if
+ we hit it without the guard, we segfault. The slightly odd return
+ value strikes me as an improvement (mst)
+ */
+
+ if ( isGV_with_GP(CvGV(coderef)) ) {
+ GV *gv = CvGV(coderef);
+ *pkg = HvNAME( GvSTASH(gv) ? GvSTASH(gv) : CvSTASH(coderef) );
+ *name = GvNAME( CvGV(coderef) );
+ } else {
+ *pkg = "__UNKNOWN__";
+ *name = "__ANON__";
+ }
+
+ return 1;
+}
+
+/* XXX: eventually this should just use the implementation in Package::Stash */
+void
+mop_get_package_symbols (HV *stash, type_filter_t filter, get_package_symbols_cb_t cb, void *ud)
+{
+ HE *he;
+
+ (void)hv_iterinit(stash);
+
+ if (filter == TYPE_FILTER_NONE) {
+ while ( (he = hv_iternext(stash)) ) {
+ STRLEN keylen;
+ const char *key = HePV(he, keylen);
+ if (!cb(key, keylen, HeVAL(he), ud)) {
+ return;
+ }
+ }
+ return;
+ }
+
+ 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)){
+ switch (filter) {
+ case TYPE_FILTER_CODE: sv = (SV *)GvCVu(gv); break;
+ case TYPE_FILTER_ARRAY: sv = (SV *)GvAV(gv); break;
+ case TYPE_FILTER_IO: sv = (SV *)GvIO(gv); break;
+ case TYPE_FILTER_HASH: sv = (SV *)GvHV(gv); break;
+ case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv); break;
+ default:
+ croak("Unknown type");
+ }
+ }
+ /* expand the gv into a real typeglob if it
+ * contains stub functions or constants and we
+ * were asked to return CODE references */
+ else if (filter == TYPE_FILTER_CODE) {
+ gv_init(gv, stash, key, keylen, GV_ADDMULTI);
+ sv = (SV *)GvCV(gv);
+ }
+
+ if (sv) {
+ if (!cb(key, keylen, sv, ud)) {
+ return;
+ }
+ }
+ }
+}
+
+static bool
+collect_all_symbols (const char *key, STRLEN keylen, SV *val, void *ud)
+{
+ HV *hash = (HV *)ud;
+
+ if (!hv_store (hash, key, keylen, newRV_inc(val), 0)) {
+ croak("failed to store symbol ref");
+ }
+
+ return TRUE;
+}
+
+HV *
+mop_get_all_package_symbols (HV *stash, type_filter_t filter)
+{
+ HV *ret = newHV ();
+ mop_get_package_symbols (stash, filter, collect_all_symbols, ret);
+ return ret;
+}
+
+#define DECLARE_KEY(name) { #name, #name, NULL, 0 }
+#define DECLARE_KEY_WITH_VALUE(name, value) { #name, value, NULL, 0 }
+
+/* the order of these has to match with those in mop.h */
+static struct {
+ const char *name;
+ const char *value;
+ SV *key;
+ U32 hash;
+} prehashed_keys[key_last] = {
+ DECLARE_KEY(_expected_method_class),
+ DECLARE_KEY(ISA),
+ DECLARE_KEY(VERSION),
+ DECLARE_KEY(accessor),
+ DECLARE_KEY(associated_class),
+ DECLARE_KEY(associated_metaclass),
+ DECLARE_KEY(associated_methods),
+ DECLARE_KEY(attribute_metaclass),
+ DECLARE_KEY(attributes),
+ DECLARE_KEY(body),
+ DECLARE_KEY(builder),
+ DECLARE_KEY(clearer),
+ DECLARE_KEY(constructor_class),
+ DECLARE_KEY(constructor_name),
+ DECLARE_KEY(definition_context),
+ DECLARE_KEY(destructor_class),
+ DECLARE_KEY(immutable_trait),
+ DECLARE_KEY(init_arg),
+ DECLARE_KEY(initializer),
+ DECLARE_KEY(insertion_order),
+ DECLARE_KEY(instance_metaclass),
+ DECLARE_KEY(is_inline),
+ DECLARE_KEY(method_metaclass),
+ DECLARE_KEY(methods),
+ DECLARE_KEY(name),
+ DECLARE_KEY(package),
+ DECLARE_KEY(package_name),
+ DECLARE_KEY(predicate),
+ DECLARE_KEY(reader),
+ DECLARE_KEY(wrapped_method_metaclass),
+ DECLARE_KEY(writer),
+ DECLARE_KEY_WITH_VALUE(package_cache_flag, "_package_cache_flag"),
+ DECLARE_KEY_WITH_VALUE(_version, "-version")
+};
+
+SV *
+mop_prehashed_key_for (mop_prehashed_key_t key)
+{
+ return prehashed_keys[key].key;
+}
+
+U32
+mop_prehashed_hash_for (mop_prehashed_key_t key)
+{
+ return prehashed_keys[key].hash;
+}
+
+void
+mop_prehash_keys ()
+{
+ int i;
+ for (i = 0; i < key_last; i++) {
+ const char *value = prehashed_keys[i].value;
+ prehashed_keys[i].key = newSVpv(value, strlen(value));
+ PERL_HASH(prehashed_keys[i].hash, value, strlen(value));
+ }
+}
+
+XS(mop_xs_simple_reader)
+{
+#ifdef dVAR
+ dVAR; dXSARGS;
+#else
+ dXSARGS;
+#endif
+ register HE *he;
+ mop_prehashed_key_t key = (mop_prehashed_key_t)CvXSUBANY(cv).any_i32;
+ SV *self;
+
+ if (items != 1) {
+ croak("expected exactly one argument");
+ }
+
+ self = ST(0);
+
+ if (!SvROK(self)) {
+ croak("can't call %s as a class method", prehashed_keys[key].name);
+ }
+
+ if (SvTYPE(SvRV(self)) != SVt_PVHV) {
+ croak("object is not a hashref");
+ }
+
+ if ((he = hv_fetch_ent((HV *)SvRV(self), prehashed_keys[key].key, 0, prehashed_keys[key].hash))) {
+ ST(0) = HeVAL(he);
+ }
+ else {
+ ST(0) = &PL_sv_undef;
+ }
+
+ XSRETURN(1);
+}
+
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