void MethodVisibility::Info::show(STATE, Object* self, int level) {
MethodVisibility* mv = as<MethodVisibility>(self);
class_header(state, self);
indent_attribute(++level, "visibility"); mv->visibility()->show(state, level);
indent_attribute(level, "method"); mv->method()->show(state, level);
close_body(level);
}
void capi_define_method(const char* file, VALUE target,
const char* name, CApiGenericFunction fptr, int arity, CApiMethodKind kind) {
NativeMethodEnvironment* env = NativeMethodEnvironment::get();
VM* state = env->state();
Symbol* method_name = state->symbol(name);
Module* module = NULL;
if (kind == cCApiSingletonMethod) {
module = c_as<Module>(env->get_object(target)->metaclass(env->state()));
}
else {
module = c_as<Module>(env->get_object(target));
}
NativeMethod* method = NULL;
method = NativeMethod::create(state,
String::create(state, file),
module,
method_name,
fptr,
Fixnum::from(arity));
MethodVisibility* visibility = MethodVisibility::create(state);
visibility->method(state, method);
switch(kind) {
case cCApiPrivateMethod:
visibility->visibility(state, state->symbol("private"));
break;
case cCApiProtectedMethod:
visibility->visibility(state, state->symbol("protected"));
break;
default: /* Also catches singletons for now. @todo Verify OK. --rue */
visibility->visibility(state, state->symbol("public"));
break;
}
module->method_table()->store(state, method_name, visibility);
state->global_cache->clear(module, method_name);
}
bool HierarchyResolver::resolve(STATE, Dispatch& msg, LookupData& lookup) {
Module* module = lookup.from;
Object* entry;
MethodVisibility* vis;
do {
entry = module->method_table()->fetch(state, msg.name);
/* Nothing, there? Ok, keep looking. */
if(entry->nil_p()) goto keep_looking;
/* A 'false' method means to terminate method lookup.
* (eg. undef_method) */
if(entry == Qfalse) return false;
vis = try_as<MethodVisibility>(entry);
/* If this was a private send, then we can handle use
* any method seen. */
if(lookup.priv) {
/* nil means that the actual method object is 'up' from here */
if(vis && vis->method()->nil_p()) goto keep_looking;
msg.method = as<Executable>(vis ? vis->method() : entry);
msg.module = module;
break;
} else if(vis) {
/* The method is private, but this wasn't a private send. */
if(vis->private_p(state)) {
return false;
} else if(vis->protected_p(state)) {
/* The method is protected, but it's not being called from
* the same module */
if(!lookup.recv->kind_of_p(state, module)) {
return false;
}
}
/* The method was callable, but we need to keep looking
* for the implementation, so make the invocation bypass all further
* visibility checks */
if(vis->method()->nil_p()) {
lookup.priv = true;
goto keep_looking;
}
msg.method = as<Executable>(vis->method());
msg.module = module;
break;
} else {
msg.method = as<Executable>(entry);
msg.module = module;
break;
}
keep_looking:
module = module->superclass();
/* No more places to look, we couldn't find it. */
if(module->nil_p()) return false;
} while(1);
return true;
}
static bool find_method(STATE, Module* module, Symbol* name, bool priv, Object* self,
Executable** found_method, Module** found_module) {
Object* entry;
MethodVisibility* vis;
do {
entry = module->method_table()->fetch(state, name);
/* Nothing, there? Ok, keep looking. */
if(entry->nil_p()) goto keep_looking;
/* A 'false' method means to terminate method lookup.
* (eg. undef_method) */
if(entry == Qfalse) return false;
vis = try_as<MethodVisibility>(entry);
/* If this was a private send, then we can handle use
* any method seen. */
if(priv) {
/* nil means that the actual method object is 'up' from here */
if(vis && vis->method()->nil_p()) goto keep_looking;
*found_method = as<Executable>(vis ? vis->method() : entry);
*found_module = module;
break;
} else if(vis) {
/* The method is private, but this wasn't a private send. */
if(vis->private_p(state)) {
return false;
} else if(vis->protected_p(state)) {
/* The method is protected, but it's not being called from
* the same module */
if(!self->kind_of_p(state, module)) {
return false;
}
}
/* The method was callable, but we need to keep looking
* for the implementation, so make the invocation bypass all further
* visibility checks */
if(vis->method()->nil_p()) {
priv = true;
goto keep_looking;
}
*found_method = as<Executable>(vis->method());
*found_module = module;
break;
} else {
*found_method = as<Executable>(entry);
*found_module = module;
break;
}
keep_looking:
module = module->superclass();
/* No more places to look, we couldn't find it. */
if(module->nil_p()) return false;
} while(1);
return true;
}
