godot/modules/gdnative/gdnative.cpp

/*************************************************************************/
/*  gdnative.cpp                                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "gdnative.h"

#include "global_config.h"
#include "global_constants.h"
#include "io/file_access_encrypted.h"
#include "os/file_access.h"
#include "os/os.h"

#include "scene/main/scene_main_loop.h"
#include "scene/resources/scene_format_text.h"

#if defined(TOOLS_ENABLED) && defined(DEBUG_METHODS_ENABLED)
#include "api_generator.h"
#endif

#ifdef TOOLS_ENABLED
#include "editor/editor_node.h"
#endif

Error NativeLibrary::initialize(NativeLibrary *&p_native_lib, const StringName p_path) {

	if (GDNativeScriptLanguage::get_singleton()->initialized_libraries.has(p_path)) {
		p_native_lib = GDNativeScriptLanguage::get_singleton()->initialized_libraries[p_path];
		return OK;
	}

	NativeLibrary *lib = memnew(NativeLibrary);
	lib->path = p_path;

	p_native_lib = lib;

	// Open the file

	Error error;
	error = OS::get_singleton()->open_dynamic_library(p_path, lib->handle);
	if (error) return error;
	ERR_FAIL_COND_V(!lib->handle, ERR_BUG);

	// Get the method

	void *library_init;
	error = OS::get_singleton()->get_dynamic_library_symbol_handle(lib->handle, GDNativeScriptLanguage::get_init_symbol_name(), library_init);
	if (error) return error;
	ERR_FAIL_COND_V(!library_init, ERR_BUG);

	void (*library_init_fpointer)(godot_native_init_options *) = (void (*)(godot_native_init_options *))library_init;

	godot_native_init_options options;

	options.in_editor = SceneTree::get_singleton()->is_editor_hint();
	options.core_api_hash = ClassDB::get_api_hash(ClassDB::API_CORE);
	options.editor_api_hash = ClassDB::get_api_hash(ClassDB::API_EDITOR);
	options.no_api_hash = ClassDB::get_api_hash(ClassDB::API_NONE);

	library_init_fpointer(&options); // Catch errors?

	GDNativeScriptLanguage::get_singleton()->initialized_libraries[p_path] = lib;

	return OK;
}

Error NativeLibrary::terminate(NativeLibrary *&p_native_lib) {

	if (!GDNativeScriptLanguage::get_singleton()->initialized_libraries.has(p_native_lib->path)) {
		OS::get_singleton()->close_dynamic_library(p_native_lib->handle);
		p_native_lib->handle = 0;
		return OK;
	}

	Error error = OK;
	void *library_terminate;
	error = OS::get_singleton()->get_dynamic_library_symbol_handle(p_native_lib->handle, GDNativeScriptLanguage::get_terminate_symbol_name(), library_terminate);
	if (!error) {

		void (*library_terminate_pointer)(godot_native_terminate_options *) = (void (*)(godot_native_terminate_options *))library_terminate;

		godot_native_terminate_options options;
		options.in_editor = SceneTree::get_singleton()->is_editor_hint();

		library_terminate_pointer(&options);
	}

	GDNativeScriptLanguage::get_singleton()->initialized_libraries.erase(p_native_lib->path);

	OS::get_singleton()->close_dynamic_library(p_native_lib->handle);
	p_native_lib->handle = 0;

	return OK;
}

// Script
#ifdef TOOLS_ENABLED

void GDNativeScript::_update_placeholder(PlaceHolderScriptInstance *p_placeholder) {
	ERR_FAIL_COND(!script_data);

	List<PropertyInfo> pinfo;
	Map<StringName, Variant> values;

	for (Map<StringName, GDNativeScriptData::Property>::Element *E = script_data->properties.front(); E; E = E->next()) {
		PropertyInfo p = E->get().info;
		p.name = String(E->key());
		pinfo.push_back(p);
		values[p.name] = E->get().default_value;
	}

	p_placeholder->update(pinfo, values);
}

void GDNativeScript::_placeholder_erased(PlaceHolderScriptInstance *p_placeholder) {

	placeholders.erase(p_placeholder);
}

#endif

bool GDNativeScript::can_instance() const {
#ifdef TOOLS_ENABLED
	return script_data || (!is_tool() && !ScriptServer::is_scripting_enabled());
#else
	// allow defaultlibrary without editor features
	if (!library.is_valid()) {
		String path = GLOBAL_GET("gdnative/default_gdnativelibrary");

		RES lib = ResourceLoader::load(path);

		if (lib.is_valid() && lib->cast_to<GDNativeLibrary>()) {
			return true;
		}
	}

	return script_data;
#endif
	//return script_data || (!tool && !ScriptServer::is_scripting_enabled());
	// change to true enable in editor stuff.
}

Ref<Script> GDNativeScript::get_base_script() const {
	Ref<GDNativeScript> base_script;
	base_script->library = library;
	base_script->script_data = script_data;
	base_script->script_name = script_data->base;
	return base_script;
}

StringName GDNativeScript::get_instance_base_type() const {
	return script_data->base_native_type;
}

ScriptInstance *GDNativeScript::instance_create(Object *p_this) {

#ifdef TOOLS_ENABLED

	// find a good way to initialize stuff in the editor
	if (!ScriptServer::is_scripting_enabled() && !is_tool()) {
		// placeholder, for nodes. But for tools we want the real thing

		PlaceHolderScriptInstance *sins = memnew(PlaceHolderScriptInstance(GDNativeScriptLanguage::singleton, Ref<Script>((Script *)this), p_this));
		placeholders.insert(sins);

		if (!library.is_valid())
			return sins;

		if (!library->native_library) {
			Error err = library->_initialize();
			if (err != OK) {
				return sins;
			}
		}

		if (!script_data) {
			script_data = library->get_script_data(script_name);
		}
		if (script_data && script_data->create_func.create_func) {
			script_data->create_func.create_func((godot_object *)p_this, script_data->create_func.method_data);
		}

		_update_placeholder(sins);

		return sins;
	}

#endif

	if (!library.is_valid()) {
		String path = GLOBAL_GET("gdnative/default_gdnativelibrary");

		RES lib = ResourceLoader::load(path);

		if (lib.is_valid() && lib->cast_to<GDNativeLibrary>()) {
			set_library(lib);
		}
	}

	GDNativeInstance *new_instance = memnew(GDNativeInstance);

	new_instance->owner = p_this;
	new_instance->script = Ref<GDNativeScript>(this);

#ifndef TOOLS_ENABLED
	if (!ScriptServer::is_scripting_enabled()) {
		new_instance->userdata = 0;
	} else {
		new_instance->userdata = script_data->create_func.create_func((godot_object *)p_this, script_data->create_func.method_data);
	}
#else
	new_instance->userdata = script_data->create_func.create_func((godot_object *)p_this, script_data->create_func.method_data);
#endif

	instances.insert(p_this);
	return new_instance;
}

bool GDNativeScript::instance_has(const Object *p_this) const {
	return instances.has((Object *)p_this); // TODO
}

bool GDNativeScript::has_source_code() const {
	return false;
}

String GDNativeScript::get_source_code() const {
	return "";
}

Error GDNativeScript::reload(bool p_keep_state) {
	return FAILED;
}

bool GDNativeScript::has_method(const StringName &p_method) const {
	if (!script_data)
		return false;
	GDNativeScriptData *data = script_data;

	while (data) {
		if (data->methods.has(p_method))
			return true;

		data = data->base_data;
	}

	return false;
}

MethodInfo GDNativeScript::get_method_info(const StringName &p_method) const {
	if (!script_data)
		return MethodInfo();
	GDNativeScriptData *data = script_data;

	while (data) {
		if (data->methods.has(p_method))
			return data->methods[p_method].info;

		data = data->base_data;
	}

	ERR_FAIL_COND_V(!script_data->methods.has(p_method), MethodInfo());
	return MethodInfo();
}

void GDNativeScript::get_script_method_list(List<MethodInfo> *p_list) const {
	if (!script_data) return;

	Set<MethodInfo> methods;
	GDNativeScriptData *data = script_data;

	while (data) {
		for (Map<StringName, GDNativeScriptData::Method>::Element *E = data->methods.front(); E; E = E->next()) {
			methods.insert(E->get().info);
		}
		data = data->base_data;
	}

	for (Set<MethodInfo>::Element *E = methods.front(); E; E = E->next()) {
		p_list->push_back(E->get());
	}
}

void GDNativeScript::get_script_property_list(List<PropertyInfo> *p_list) const {
	if (!script_data) return;

	Set<PropertyInfo> properties;
	GDNativeScriptData *data = script_data;

	while (data) {
		for (Map<StringName, GDNativeScriptData::Property>::Element *E = data->properties.front(); E; E = E->next()) {
			properties.insert(E->get().info);
		}
		data = data->base_data;
	}

	for (Set<PropertyInfo>::Element *E = properties.front(); E; E = E->next()) {
		p_list->push_back(E->get());
	}
}

bool GDNativeScript::get_property_default_value(const StringName &p_property, Variant &r_value) const {
	if (!script_data) return false;

	GDNativeScriptData *data = script_data;

	while (data) {
		if (data->properties.has(p_property)) {
			r_value = data->properties[p_property].default_value;
			return true;
		}

		data = data->base_data;
	}

	return false;
}

bool GDNativeScript::is_tool() const {
	ERR_FAIL_COND_V(!script_data, false);
	return script_data->is_tool;
}

String GDNativeScript::get_node_type() const {
	return ""; // ?
}

ScriptLanguage *GDNativeScript::get_language() const {
	return GDNativeScriptLanguage::singleton;
}

bool GDNativeScript::has_script_signal(const StringName &p_signal) const {
	if (!script_data)
		return false;

	GDNativeScriptData *data = script_data;

	while (data) {
		if (data->signals_.has(p_signal)) {
			return true;
		}

		data = data->base_data;
	}

	return false;
}

void GDNativeScript::get_script_signal_list(List<MethodInfo> *r_signals) const {
	if (!script_data)
		return;

	Set<MethodInfo> signals_;
	GDNativeScriptData *data = script_data;

	while (data) {

		for (Map<StringName, GDNativeScriptData::Signal>::Element *S = data->signals_.front(); S; S = S->next()) {
			signals_.insert(S->get().signal);
		}

		data = data->base_data;
	}

	for (Set<MethodInfo>::Element *E = signals_.front(); E; E = E->next()) {
		r_signals->push_back(E->get());
	}
}

Variant GDNativeScript::_new(const Variant **p_args, int p_argcount, Variant::CallError &r_error) {

	/* STEP 1, CREATE */

	if (!library.is_valid() || ((String)script_name).empty() || !script_data) {
		r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
		return Variant();
	}

	r_error.error = Variant::CallError::CALL_OK;
	REF ref;
	Object *owner = NULL;

	GDNativeScriptData *_baseptr = script_data;
	while (_baseptr->base_data) {
		_baseptr = _baseptr->base_data;
	}

	if (!(_baseptr->base_native_type == "")) {
		owner = ClassDB::instance(_baseptr->base_native_type);
	} else {
		owner = memnew(Reference); //by default, no base means use reference
	}

	Reference *r = owner->cast_to<Reference>();
	if (r) {
		ref = REF(r);
	}

	// GDScript does it like this: _create_instance(p_args, p_argcount, owner, r != NULL, r_error);
	// @Todo support varargs for constructors.
	GDNativeInstance *instance = (GDNativeInstance *)instance_create(owner);

	owner->set_script_instance(instance);
	if (!instance) {
		if (ref.is_null()) {
			memdelete(owner); //no owner, sorry
		}
		return Variant();
	}

	if (ref.is_valid()) {
		return ref;
	} else {
		return owner;
	}
}

Ref<GDNativeLibrary> GDNativeScript::get_library() const {
	return library;
}

void GDNativeScript::set_library(Ref<GDNativeLibrary> p_library) {
	library = p_library;

#ifdef TOOLS_ENABLED
	if (!ScriptServer::is_scripting_enabled())
		return;
#endif
	if (library.is_valid()) {
		Error initalize_status = library->_initialize();
		ERR_FAIL_COND(initalize_status != OK);
		if (script_name) {
			script_data = library->native_library->scripts[script_name];
			ERR_FAIL_COND(!script_data);
		}
	}
}

StringName GDNativeScript::get_script_name() const {
	return script_name;
}

void GDNativeScript::set_script_name(StringName p_script_name) {
	script_name = p_script_name;

	if (library.is_valid()) {
#ifdef TOOLS_ENABLED
		if (!library->native_library) {
			library->_initialize();
		}
#endif
		if (library->native_library) {
			script_data = library->get_script_data(script_name);
			ERR_FAIL_COND(!script_data);
		}
	}
}

void GDNativeScript::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_library"), &GDNativeScript::get_library);
	ClassDB::bind_method(D_METHOD("set_library", "library"), &GDNativeScript::set_library);
	ClassDB::bind_method(D_METHOD("get_script_name"), &GDNativeScript::get_script_name);
	ClassDB::bind_method(D_METHOD("set_script_name", "script_name"), &GDNativeScript::set_script_name);

	ClassDB::bind_vararg_method(METHOD_FLAGS_DEFAULT, "new", &GDNativeScript::_new, MethodInfo(Variant::OBJECT, "new"));

	ADD_PROPERTYNZ(PropertyInfo(Variant::OBJECT, "library", PROPERTY_HINT_RESOURCE_TYPE, "GDNativeLibrary"), "set_library", "get_library");
	ADD_PROPERTYNZ(PropertyInfo(Variant::STRING, "script_name"), "set_script_name", "get_script_name");
}

GDNativeScript::GDNativeScript() {
	script_data = NULL;
	GDNativeScriptLanguage::get_singleton()->script_list.insert(this);
}

GDNativeScript::~GDNativeScript() {
	//hmm
	GDNativeScriptLanguage::get_singleton()->script_list.erase(this);
}

// Library

GDNativeLibrary *GDNativeLibrary::currently_initialized_library = NULL;

GDNativeLibrary *GDNativeLibrary::get_currently_initialized_library() {
	return currently_initialized_library;
}

static const char *_dl_platforms_info[] = {
	"|unix|so|Unix",
	"unix|x11|so|X11",
	"unix|server|so|Server",
	"unix|android|so|Android",
	"unix|haiku|so|Haiku", // Right?
	"|mac|dylib|Mac",
	"mac|ios|dylib|iOS",
	"mac|osx|dylib|OSX",
	"|html5|js|HTML5",
	"|windows|dll|Windows",
	"windows|uwp|dll|UWP",
	NULL // Finishing condition
};

void GDNativeLibrary::set_platform_file(StringName p_platform, String p_file) {
	if (p_file.empty()) {
		platform_files.erase(p_platform);
	} else {
		platform_files[p_platform] = p_file;
	}
}

String GDNativeLibrary::get_platform_file(StringName p_platform) const {
	if (platform_files.has(p_platform)) {
		return platform_files[p_platform];
	} else {
		return "";
	}
}

Error GDNativeLibrary::_initialize() {
	_THREAD_SAFE_METHOD_

	// Get the file

	const String platform_name = OS::get_singleton()->get_name();
	String platform_file("");
	char **platform_info = (char **)_dl_platforms_info;

	if (platform_files.has(platform_name.to_lower())) {
		platform_file = platform_files[platform_name.to_lower()];
	}

	while (*platform_info) {
		String platform_info_string(*platform_info);

		if (platform_name == platform_info_string.get_slicec('|', 3)) {
			String platform_key = platform_info_string.get_slicec('|', 1);
			String fallback_platform_key = platform_info_string.get_slicec('|', 0);

			if (platform_files.has(platform_key)) {
				platform_file = platform_files[platform_key];
			} else if (!fallback_platform_key.empty() && platform_files.has(fallback_platform_key)) {
				platform_file = platform_files[fallback_platform_key];
			} else {
				return ERR_UNAVAILABLE;
			}
		}
		platform_info++;
	}
	ERR_FAIL_COND_V(platform_file == "", ERR_DOES_NOT_EXIST);

	StringName path = GlobalConfig::get_singleton()->globalize_path(platform_file);

	GDNativeLibrary::currently_initialized_library = this;

	Error ret = NativeLibrary::initialize(native_library, path);
	native_library->dllib = this;

	GDNativeLibrary::currently_initialized_library = NULL;

	return ret;
}

Error GDNativeLibrary::_terminate() {
	ERR_FAIL_COND_V(!native_library, ERR_BUG);
	ERR_FAIL_COND_V(!native_library->handle, ERR_BUG);

	// de-init stuff

	for (Map<StringName, GDNativeScriptData *>::Element *E = native_library->scripts.front(); E; E = E->next()) {
		for (Map<StringName, GDNativeScriptData::Method>::Element *M = E->get()->methods.front(); M; M = M->next()) {
			if (M->get().method.free_func) {
				M->get().method.free_func(M->get().method.method_data);
			}
		}
		if (E->get()->create_func.free_func) {
			E->get()->create_func.free_func(E->get()->create_func.method_data);
		}
		if (E->get()->destroy_func.free_func) {
			E->get()->destroy_func.free_func(E->get()->destroy_func.method_data);
		}

		for (Set<GDNativeScript *>::Element *S = GDNativeScriptLanguage::get_singleton()->script_list.front(); S; S = S->next()) {
			if (S->get()->script_data == E->get()) {
				S->get()->script_data = NULL;
			}
		}

		memdelete(E->get());
	}

	Error ret = NativeLibrary::terminate(native_library);
	native_library->scripts.clear();

	return ret;
}

void GDNativeLibrary::_register_script(const StringName p_name, const StringName p_base, godot_instance_create_func p_instance_func, godot_instance_destroy_func p_destroy_func) {
	ERR_FAIL_COND(!native_library);
	ERR_FAIL_COND(native_library->scripts.has(p_name));

	GDNativeScriptData *s = memnew(GDNativeScriptData);
	s->base = p_base;
	s->create_func = p_instance_func;
	s->destroy_func = p_destroy_func;
	Map<StringName, GDNativeScriptData *>::Element *E = native_library->scripts.find(p_base);
	if (E) {
		s->base_data = E->get();
		s->base_native_type = s->base_data->base_native_type;
	} else {
		if (!ClassDB::class_exists(p_base)) {
			memdelete(s);
			ERR_EXPLAIN("Invalid base for registered type '" + p_name + "'");
			ERR_FAIL();
		}
		s->base_native_type = p_base;
	}

	native_library->scripts.insert(p_name, s);
}

void GDNativeLibrary::_register_tool_script(const StringName p_name, const StringName p_base, godot_instance_create_func p_instance_func, godot_instance_destroy_func p_destroy_func) {
	ERR_FAIL_COND(!native_library);
	ERR_FAIL_COND(native_library->scripts.has(p_name));

	GDNativeScriptData *s = memnew(GDNativeScriptData);
	s->base = p_base;
	s->create_func = p_instance_func;
	s->destroy_func = p_destroy_func;
	s->is_tool = true;
	Map<StringName, GDNativeScriptData *>::Element *E = native_library->scripts.find(p_base);
	if (E) {
		s->base_data = E->get();
		s->base_native_type = s->base_data->base_native_type;
	} else {
		if (!ClassDB::class_exists(p_base)) {
			memdelete(s);
			ERR_EXPLAIN("Invalid base for registered type '" + p_name + "'");
			ERR_FAIL();
		}
		s->base_native_type = p_base;
	}

	native_library->scripts.insert(p_name, s);
}

void GDNativeLibrary::_register_script_method(const StringName p_name, const StringName p_method, godot_method_attributes p_attr, godot_instance_method p_func, MethodInfo p_info) {
	ERR_FAIL_COND(!native_library);
	ERR_FAIL_COND(!native_library->scripts.has(p_name));

	p_info.name = p_method;
	GDNativeScriptData::Method method;

	method = GDNativeScriptData::Method(p_func, p_info, p_attr.rpc_type);

	native_library->scripts[p_name]->methods.insert(p_method, method);
}

void GDNativeLibrary::_register_script_property(const StringName p_name, const String p_path, godot_property_attributes *p_attr, godot_property_set_func p_setter, godot_property_get_func p_getter) {
	ERR_FAIL_COND(!native_library);
	ERR_FAIL_COND(!native_library->scripts.has(p_name));

	GDNativeScriptData::Property p;

	PropertyInfo pi;
	pi.name = p_path;

	if (p_attr != NULL) {
		pi = PropertyInfo((Variant::Type)p_attr->type, p_path, (PropertyHint)p_attr->hint, *(String *)&p_attr->hint_string, p_attr->usage);

		p = GDNativeScriptData::Property(p_setter, p_getter, pi, *(Variant *)&p_attr->default_value, p_attr->rset_type);
	}

	native_library->scripts[p_name]->properties.insert(p_path, p);
}

void GDNativeLibrary::_register_script_signal(const StringName p_name, const godot_signal *p_signal) {
	ERR_FAIL_COND(!native_library);
	ERR_FAIL_COND(!native_library->scripts.has(p_name));
	ERR_FAIL_COND(!p_signal);

	GDNativeScriptData::Signal signal;

	signal.signal.name = *(String *)&p_signal->name;

	{
		List<PropertyInfo> arguments;
		for (int i = 0; i < p_signal->num_args; i++) {
			PropertyInfo info;
			godot_signal_argument attrib = p_signal->args[i];

			String *name = (String *)&attrib.name;
			info.name = *name;
			info.type = (Variant::Type)attrib.type;
			info.hint = (PropertyHint)attrib.hint;
			info.hint_string = *(String *)&attrib.hint_string;
			info.usage = attrib.usage;

			arguments.push_back(info);
		}

		signal.signal.arguments = arguments;
	}

	{
		Vector<Variant> default_arguments;
		for (int i = 0; i < p_signal->num_default_args; i++) {
			Variant *v;
			godot_signal_argument attrib = p_signal->args[i];

			v = (Variant *)&attrib.default_value;

			default_arguments.push_back(*v);
		}

		signal.signal.default_arguments = default_arguments;
	}

	native_library->scripts[p_name]->signals_.insert(*(String *)&p_signal->name, signal);
}

GDNativeScriptData *GDNativeLibrary::get_script_data(const StringName p_name) {
	ERR_FAIL_COND_V(!native_library, NULL);

	ERR_FAIL_COND_V(!native_library->scripts.has(p_name), NULL);

	return native_library->scripts[p_name];
}

bool GDNativeLibrary::_set(const StringName &p_name, const Variant &p_value) {
	String name = p_name;
	if (name.begins_with("platform/")) {
		set_platform_file(name.get_slice("/", 1), p_value);
		return true;
	}
	return false;
}

bool GDNativeLibrary::_get(const StringName &p_name, Variant &r_ret) const {
	String name = p_name;
	if (name.begins_with("platform/")) {
		r_ret = get_platform_file(name.get_slice("/", 1));
		return true;
	}
	return false;
}

void GDNativeLibrary::_get_property_list(List<PropertyInfo> *p_list) const {
	char **platform_info = (char **)_dl_platforms_info;

	Set<String> registered_platform_names;
	{
		List<StringName> ep;
		// ep.push_back("X11");
		// EditorImportExport::get_singleton()->get_export_platforms(&ep);

		// @Todo
		// get export platforms with the new export system somehow.
		for (List<StringName>::Element *E = ep.front(); E; E = E->next()) {
			registered_platform_names.insert(String(E->get()).to_lower());
		}
	}

	while (*platform_info) {
		String platform_info_string(*platform_info);
		String fallback_platform_key = platform_info_string.get_slicec('|', 0);
		String platform_key = platform_info_string.get_slicec('|', 1);
		String platform_extension = platform_info_string.get_slicec('|', 2);
		String platform_name = platform_info_string.get_slicec('|', 3);

		registered_platform_names.erase(platform_name);

		if (fallback_platform_key.empty()) {
			p_list->push_back(PropertyInfo(Variant::STRING, "platform/" + platform_key, PROPERTY_HINT_FILE, "*." + platform_extension));

		} else {
			if (platform_files.has(platform_key)) {
				p_list->push_back(PropertyInfo(Variant::STRING, "platform/" + platform_key, PROPERTY_HINT_FILE, "*." + platform_extension, PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_CHECKABLE | PROPERTY_USAGE_CHECKED));
			} else {
				p_list->push_back(PropertyInfo(Variant::STRING, "platform/" + platform_key, PROPERTY_HINT_FILE, "*." + platform_extension, PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_CHECKABLE));
			}
		}
		platform_info++;
	}

	while (registered_platform_names.size()) {
		const String platform_name = registered_platform_names.front()->get();
		registered_platform_names.erase(platform_name);
		p_list->push_back(PropertyInfo(Variant::STRING, "platform/" + platform_name.to_lower(), PROPERTY_HINT_FILE, "*"));
	}
}

void GDNativeLibrary::_notification(int what) {
	// TODO
}

void GDNativeLibrary::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_platform_file", "platform", "file"), &GDNativeLibrary::set_platform_file);
	ClassDB::bind_method(D_METHOD("get_platform_file", "platform"), &GDNativeLibrary::get_platform_file);
}

GDNativeLibrary::GDNativeLibrary() {
	native_library = NULL;
}

GDNativeLibrary::~GDNativeLibrary() {

	if (!native_library) {
		return;
	}

	if (native_library->handle) {
		_terminate();
	}
}

// Instance

bool GDNativeInstance::set(const StringName &p_name, const Variant &p_value) {
	if (!script->script_data)
		return false;
	if (script->script_data->properties.has(p_name)) {
		script->script_data->properties[p_name].setter.set_func((godot_object *)owner, script->script_data->properties[p_name].setter.method_data, userdata, *(godot_variant *)&p_value);
		return true;
	}
	return false;
}

bool GDNativeInstance::get(const StringName &p_name, Variant &r_ret) const {
	if (!script->script_data)
		return false;
	if (script->script_data->properties.has(p_name)) {
		godot_variant value = script->script_data->properties[p_name].getter.get_func((godot_object *)owner, script->script_data->properties[p_name].getter.method_data, userdata);
		r_ret = *(Variant *)&value;
		return true;
	}
	return false;
}

void GDNativeInstance::get_property_list(List<PropertyInfo> *p_properties) const {
	script->get_script_property_list(p_properties);
	// TODO: dynamic properties
}

Variant::Type GDNativeInstance::get_property_type(const StringName &p_name, bool *r_is_valid) const {
	if (script->script_data->properties.has(p_name)) {
		*r_is_valid = true;
		return script->script_data->properties[p_name].info.type;
	}
	*r_is_valid = false;
	return Variant::NIL;
}

void GDNativeInstance::get_method_list(List<MethodInfo> *p_list) const {
	script->get_script_method_list(p_list);
}

bool GDNativeInstance::has_method(const StringName &p_method) const {
	return script->has_method(p_method);
}

Variant GDNativeInstance::call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
	// TODO: validated methods & errors

	GDNativeScriptData *data_ptr = script->script_data;
	while (data_ptr) {
		Map<StringName, GDNativeScriptData::Method>::Element *E = data_ptr->methods.find(p_method);
		if (E) {
			godot_variant result = E->get().method.method((godot_object *)owner, E->get().method.method_data, userdata, p_argcount, (godot_variant **)p_args);
			return *(Variant *)&result;
		}
		data_ptr = data_ptr->base_data;
	}
	r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
	return Variant();
}

void GDNativeInstance::call_multilevel(const StringName &p_method, const Variant **p_args, int p_argcount) {
	// TODO: validated methods & errors

	GDNativeScriptData *data_ptr = script->script_data;
	while (data_ptr) {
		Map<StringName, GDNativeScriptData::Method>::Element *E = data_ptr->methods.find(p_method);
		if (E) {
			E->get().method.method((godot_object *)owner, E->get().method.method_data, userdata, p_argcount, (godot_variant **)p_args);
		}
		data_ptr = data_ptr->base_data;
	}
}

void GDNativeInstance::_ml_call_reversed(GDNativeScriptData *data_ptr, const StringName &p_method, const Variant **p_args, int p_argcount) {
	// TODO: validated methods & errors

	if (data_ptr->base_data)
		_ml_call_reversed(data_ptr->base_data, p_method, p_args, p_argcount);

	// Variant::CallError ce;

	Map<StringName, GDNativeScriptData::Method>::Element *E = data_ptr->methods.find(p_method);
	if (E) {
		E->get().method.method((godot_object *)owner, E->get().method.method_data, userdata, p_argcount, (godot_variant **)p_args);
	}
}

void GDNativeInstance::call_multilevel_reversed(const StringName &p_method, const Variant **p_args, int p_argcount) {
	if (script.ptr() && script->script_data) {
		_ml_call_reversed(script->script_data, p_method, p_args, p_argcount);
	}
}

void GDNativeInstance::notification(int p_notification) {
	Variant value = p_notification;
	const Variant *args[1] = { &value };
	call_multilevel(GDNativeScriptLanguage::singleton->strings._notification, args, 1);
}

Ref<Script> GDNativeInstance::get_script() const {
	return script;
}

ScriptLanguage *GDNativeInstance::get_language() {
	return GDNativeScriptLanguage::singleton;
}

ScriptInstance::RPCMode GDNativeInstance::get_rpc_mode(const StringName &p_method) const {
	GDNativeScriptData::Method m = script->script_data->methods[p_method];
	switch (m.rpc_mode) {
		case GODOT_METHOD_RPC_MODE_DISABLED:
			return RPC_MODE_DISABLED;
		case GODOT_METHOD_RPC_MODE_REMOTE:
			return RPC_MODE_REMOTE;
		case GODOT_METHOD_RPC_MODE_SYNC:
			return RPC_MODE_SYNC;
		case GODOT_METHOD_RPC_MODE_MASTER:
			return RPC_MODE_MASTER;
		case GODOT_METHOD_RPC_MODE_SLAVE:
			return RPC_MODE_SLAVE;
		default:
			return RPC_MODE_DISABLED;
	}
}

ScriptInstance::RPCMode GDNativeInstance::get_rset_mode(const StringName &p_variable) const {
	GDNativeScriptData::Property p = script->script_data->properties[p_variable];
	switch (p.rset_mode) {
		case GODOT_METHOD_RPC_MODE_DISABLED:
			return RPC_MODE_DISABLED;
		case GODOT_METHOD_RPC_MODE_REMOTE:
			return RPC_MODE_REMOTE;
		case GODOT_METHOD_RPC_MODE_SYNC:
			return RPC_MODE_SYNC;
		case GODOT_METHOD_RPC_MODE_MASTER:
			return RPC_MODE_MASTER;
		case GODOT_METHOD_RPC_MODE_SLAVE:
			return RPC_MODE_SLAVE;
		default:
			return RPC_MODE_DISABLED;
	}
}

GDNativeInstance::GDNativeInstance() {
	owner = NULL;
	userdata = NULL;
}

GDNativeInstance::~GDNativeInstance() {
	if (script.is_valid()) {
		if (owner) {
			script->instances.erase(owner);
		}
		if (!script->script_data)
			return;
		script->script_data->destroy_func.destroy_func((godot_object *)owner, script->script_data->destroy_func.method_data, userdata);
		if (script->script_data->destroy_func.free_func)
			script->script_data->destroy_func.free_func(script->script_data->destroy_func.method_data);
		if (script->script_data->create_func.free_func)
			script->script_data->create_func.free_func(script->script_data->create_func.method_data);
	}
}

// Language

GDNativeScriptLanguage *GDNativeScriptLanguage::singleton = NULL;

String GDNativeScriptLanguage::get_name() const {
	return "Native";
}

void _add_reload_node() {
#ifdef TOOLS_ENABLED
	GDNativeReloadNode *rn = memnew(GDNativeReloadNode);
	EditorNode::get_singleton()->add_child(rn);
#endif
}

void GDNativeScriptLanguage::init() {
	// TODO: Expose globals
	GLOBAL_DEF("gdnative/default_gdnativelibrary", "");
	PropertyInfo prop_info(Variant::STRING, "gdnative/default_gdnativelibrary", PROPERTY_HINT_FILE, "tres,res,dllib");
	GlobalConfig::get_singleton()->set_custom_property_info("gdnative/default_gdnativelibrary", prop_info);

// generate bindings
#if defined(TOOLS_ENABLED) && defined(DEBUG_METHODS_ENABLED)

	List<String> args = OS::get_singleton()->get_cmdline_args();

	List<String>::Element *E = args.find("--gdnative-generate-json-api");

	if (E && E->next()) {
		if (generate_c_api(E->next()->get()) != OK) {
			ERR_PRINT("Failed to generate C API\n");
		}
	}
#endif

#ifdef TOOLS_ENABLED
	// if (SceneTree::get_singleton()->is_editor_hint()) {
	EditorNode::add_init_callback(&_add_reload_node);
// }
#endif
}

String GDNativeScriptLanguage::get_type() const {
	return "Native";
}

String GDNativeScriptLanguage::get_extension() const {
	return "gdn";
}

Error GDNativeScriptLanguage::execute_file(const String &p_path) {
	return OK; // ??
}

void GDNativeScriptLanguage::finish() {
	// cleanup is for noobs
}

// scons doesn't want to link in the api source so we need to call a dummy function to cause it to link
extern "C" void _api_anchor();

void GDNativeScriptLanguage::_compile_dummy_for_the_api() {
	_api_anchor();
}

Ref<Script> GDNativeScriptLanguage::get_template(const String &p_class_name, const String &p_base_class_name) const {
	GDNativeScript *src = memnew(GDNativeScript);
	src->set_script_name(p_class_name);
	return Ref<GDNativeScript>(src);
}

bool GDNativeScriptLanguage::validate(const String &p_script, int &r_line_error, int &r_col_error, String &r_test_error, const String &p_path, List<String> *r_functions) const {
	return false; // TODO
}

Script *GDNativeScriptLanguage::create_script() const {
	GDNativeScript *scr = memnew(GDNativeScript);
	return scr;
}

bool GDNativeScriptLanguage::has_named_classes() const {
	return true;
}

int GDNativeScriptLanguage::find_function(const String &p_function, const String &p_code) const {
	return -1; // No source code!
}

String GDNativeScriptLanguage::make_function(const String &p_class, const String &p_name, const PoolStringArray &p_args) const {
	return ""; // No source code!
}

void GDNativeScriptLanguage::add_global_constant(const StringName &p_variable, const Variant &p_value) {
	// TODO TODO TODO
}

// TODO: Any debugging? (research)
String GDNativeScriptLanguage::debug_get_error() const {
	return "";
}

int GDNativeScriptLanguage::debug_get_stack_level_count() const {
	return 1; // ?
}

int GDNativeScriptLanguage::debug_get_stack_level_line(int p_level) const {
	return -1;
}

String GDNativeScriptLanguage::debug_get_stack_level_function(int p_level) const {
	return "[native code]"; // ?
}

String GDNativeScriptLanguage::debug_get_stack_level_source(int p_level) const {
	return "";
}

void GDNativeScriptLanguage::debug_get_stack_level_members(int p_level, List<String> *p_members, List<Variant> *p_values, int p_max_subitems, int p_max_depth) {}

void GDNativeScriptLanguage::debug_get_globals(List<String> *p_locals, List<Variant> *p_values, int p_max_subitems, int p_max_depth) {}

String GDNativeScriptLanguage::debug_parse_stack_level_expression(int p_level, const String &p_expression, int p_max_subitems, int p_max_depth) {
	return ""; // ??
}

void GDNativeScriptLanguage::reload_all_scripts() {
	// @Todo
}

void GDNativeScriptLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_soft_reload) {
	// @Todo
	OS::get_singleton()->print("reload tool scripts\n");
}

void GDNativeScriptLanguage::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("gdn"); // Container file format
}

void GDNativeScriptLanguage::get_public_functions(List<MethodInfo> *p_functions) const {
}

void GDNativeScriptLanguage::get_public_constants(List<Pair<String, Variant> > *p_constants) const {
}

// TODO: all profilling
void GDNativeScriptLanguage::profiling_start() {
}

void GDNativeScriptLanguage::profiling_stop() {
}

int GDNativeScriptLanguage::profiling_get_accumulated_data(ProfilingInfo *p_info_arr, int p_info_max) {
	return 0;
}

int GDNativeScriptLanguage::profiling_get_frame_data(ProfilingInfo *p_info_arr, int p_info_max) {
	return 0;
}

void GDNativeScriptLanguage::frame() {
}

String GDNativeScriptLanguage::get_init_symbol_name() {
	return "godot_native_init"; // TODO: Maybe make some internal function which would do the actual stuff
}

String GDNativeScriptLanguage::get_terminate_symbol_name() {
	return "godot_native_terminate";
}

GDNativeScriptLanguage::GDNativeScriptLanguage() {
	ERR_FAIL_COND(singleton);
	strings._notification = StringName("_notification");
	singleton = this;
	initialized_libraries = Map<StringName, NativeLibrary *>();
}

GDNativeScriptLanguage::~GDNativeScriptLanguage() {
	singleton = NULL;
}

// DLReloadNode

void GDNativeReloadNode::_bind_methods() {
	ClassDB::bind_method("_notification", &GDNativeReloadNode::_notification);
}

void GDNativeReloadNode::_notification(int p_what) {
#ifdef TOOLS_ENABLED

	switch (p_what) {
		case MainLoop::NOTIFICATION_WM_FOCUS_IN: {

			Set<NativeLibrary *> libs_to_reload;

			for (Map<StringName, NativeLibrary *>::Element *L = GDNativeScriptLanguage::get_singleton()->initialized_libraries.front(); L; L = L->next()) {
				// check if file got modified at all
				// @Todo

				libs_to_reload.insert(L->get());
			}

			for (Set<NativeLibrary *>::Element *L = libs_to_reload.front(); L; L = L->next()) {

				GDNativeLibrary *lib = L->get()->dllib;

				lib->_terminate();
				lib->_initialize();

				// update placeholders (if any)

				Set<GDNativeScript *> scripts;

				for (Set<GDNativeScript *>::Element *S = GDNativeScriptLanguage::get_singleton()->script_list.front(); S; S = S->next()) {

					if (lib->native_library->scripts.has(S->get()->get_script_name())) {
						GDNativeScript *script = S->get();
						script->script_data = lib->get_script_data(script->get_script_name());
						scripts.insert(script);
					}
				}

				for (Set<GDNativeScript *>::Element *S = scripts.front(); S; S = S->next()) {
					GDNativeScript *script = S->get();
					if (script->placeholders.size() == 0)
						continue;

					for (Set<PlaceHolderScriptInstance *>::Element *P = script->placeholders.front(); P; P = P->next()) {
						PlaceHolderScriptInstance *p = P->get();
						script->_update_placeholder(p);
					}
				}
			}

		} break;
		default: {
		};
	}
#endif
}

// Resource loader/saver

RES ResourceFormatLoaderGDNativeScript::load(const String &p_path, const String &p_original_path, Error *r_error) {
	ResourceFormatLoaderText rsflt;
	return rsflt.load(p_path, p_original_path, r_error);
}

void ResourceFormatLoaderGDNativeScript::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("gdn");
}
bool ResourceFormatLoaderGDNativeScript::handles_type(const String &p_type) const {
	return (p_type == "Script" || p_type == "Native");
}
String ResourceFormatLoaderGDNativeScript::get_resource_type(const String &p_path) const {
	String el = p_path.get_extension().to_lower();
	if (el == "gdn")
		return "Native";
	return "";
}

Error ResourceFormatSaverGDNativeScript::save(const String &p_path, const RES &p_resource, uint32_t p_flags) {
	ResourceFormatSaverText rfst;
	return rfst.save(p_path, p_resource, p_flags);
}

bool ResourceFormatSaverGDNativeScript::recognize(const RES &p_resource) const {
	return p_resource->cast_to<GDNativeScript>() != NULL;
}

void ResourceFormatSaverGDNativeScript::get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const {
	if (p_resource->cast_to<GDNativeScript>()) {
		p_extensions->push_back("gdn");
	}
}