[GDNative] new GDNative API

This adds GDNative as a separate class type.
It can be used to interface with native libraries by
using "native calls", which can be registered by modules
(and in future other GDNative libraries?).

It also reworks the currently called "GDNativeScript" into a
"NativeScript" that just makes use of the new GDNative instead
of it being the component that implements that functionality.

1 files changed, 185 insertions, 0 deletions

diff --git a/modules/gdnative/godot/gdnative.cpp b/modules/gdnative/godot/gdnative.cpp
new file mode 100644
index 0000000000..7b94b75a52
--- /dev/null
+++ b/modules/gdnative/godot/gdnative.cpp
@@ -0,0 +1,185 @@
+/*************************************************************************/
+/*  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 "class_db.h"
+#include "error_macros.h"
+#include "gdnative.h"
+#include "global_constants.h"
+#include "project_settings.h"
+#include "variant.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern "C" void _string_api_anchor();
+extern "C" void _vector2_api_anchor();
+extern "C" void _rect2_api_anchor();
+extern "C" void _vector3_api_anchor();
+extern "C" void _transform2d_api_anchor();
+extern "C" void _plane_api_anchor();
+extern "C" void _quat_api_anchor();
+extern "C" void _basis_api_anchor();
+extern "C" void _rect3_api_anchor();
+extern "C" void _transform_api_anchor();
+extern "C" void _color_api_anchor();
+extern "C" void _node_path_api_anchor();
+extern "C" void _rid_api_anchor();
+extern "C" void _dictionary_api_anchor();
+extern "C" void _array_api_anchor();
+extern "C" void _pool_arrays_api_anchor();
+extern "C" void _variant_api_anchor();
+
+void _api_anchor() {
+
+	_string_api_anchor();
+	_vector2_api_anchor();
+	_rect2_api_anchor();
+	_vector3_api_anchor();
+	_transform2d_api_anchor();
+	_plane_api_anchor();
+	_quat_api_anchor();
+	_rect3_api_anchor();
+	_basis_api_anchor();
+	_transform_api_anchor();
+	_color_api_anchor();
+	_node_path_api_anchor();
+	_rid_api_anchor();
+	_dictionary_api_anchor();
+	_array_api_anchor();
+	_pool_arrays_api_anchor();
+	_variant_api_anchor();
+}
+
+void GDAPI godot_object_destroy(godot_object *p_o) {
+	memdelete((Object *)p_o);
+}
+
+// Singleton API
+
+godot_object GDAPI *godot_global_get_singleton(char *p_name) {
+	return (godot_object *)ProjectSettings::get_singleton()->get_singleton_object(String(p_name));
+} // result shouldn't be freed
+
+// MethodBind API
+
+godot_method_bind GDAPI *godot_method_bind_get_method(const char *p_classname, const char *p_methodname) {
+
+	MethodBind *mb = ClassDB::get_method(StringName(p_classname), StringName(p_methodname));
+	// MethodBind *mb = ClassDB::get_method("Node", "get_name");
+	return (godot_method_bind *)mb;
+}
+
+void GDAPI godot_method_bind_ptrcall(godot_method_bind *p_method_bind, godot_object *p_instance, const void **p_args, void *p_ret) {
+
+	MethodBind *mb = (MethodBind *)p_method_bind;
+	Object *o = (Object *)p_instance;
+	mb->ptrcall(o, p_args, p_ret);
+}
+
+godot_variant GDAPI godot_method_bind_call(godot_method_bind *p_method_bind, godot_object *p_instance, const godot_variant **p_args, const int p_arg_count, godot_variant_call_error *p_call_error) {
+	MethodBind *mb = (MethodBind *)p_method_bind;
+	Object *o = (Object *)p_instance;
+	const Variant **args = (const Variant **)p_args;
+
+	godot_variant ret;
+	godot_variant_new_nil(&ret);
+
+	Variant *ret_val = (Variant *)&ret;
+
+	Variant::CallError r_error;
+	*ret_val = mb->call(o, args, p_arg_count, r_error);
+
+	if (p_call_error) {
+		p_call_error->error = (godot_variant_call_error_error)r_error.error;
+		p_call_error->argument = r_error.argument;
+		p_call_error->expected = (godot_variant_type)r_error.expected;
+	}
+
+	return ret;
+}
+
+// @Todo
+/*
+void GDAPI godot_method_bind_varcall(godot_method_bind *p_method_bind)
+{
+
+}
+*/
+
+godot_class_constructor GDAPI godot_get_class_constructor(const char *p_classname) {
+	ClassDB::ClassInfo *class_info = ClassDB::classes.getptr(StringName(p_classname));
+	if (class_info)
+		return (godot_class_constructor)class_info->creation_func;
+	return NULL;
+}
+
+godot_dictionary GDAPI godot_get_global_constants() {
+	godot_dictionary constants;
+	godot_dictionary_new(&constants);
+	Dictionary *p_constants = (Dictionary *)&constants;
+	const int constants_count = GlobalConstants::get_global_constant_count();
+	for (int i = 0; i < constants_count; ++i) {
+		const char *name = GlobalConstants::get_global_constant_name(i);
+		int value = GlobalConstants::get_global_constant_value(i);
+		(*p_constants)[name] = value;
+	}
+	return constants;
+}
+
+// System functions
+void GDAPI *godot_alloc(int p_bytes) {
+	return memalloc(p_bytes);
+}
+
+void GDAPI *godot_realloc(void *p_ptr, int p_bytes) {
+	return memrealloc(p_ptr, p_bytes);
+}
+
+void GDAPI godot_free(void *p_ptr) {
+	memfree(p_ptr);
+}
+
+void GDAPI godot_print_error(const char *p_description, const char *p_function, const char *p_file, int p_line) {
+	_err_print_error(p_function, p_file, p_line, p_description, ERR_HANDLER_ERROR);
+}
+
+void GDAPI godot_print_warning(const char *p_description, const char *p_function, const char *p_file, int p_line) {
+	_err_print_error(p_function, p_file, p_line, p_description, ERR_HANDLER_WARNING);
+}
+
+void GDAPI godot_print(const godot_string *p_message) {
+	print_line(*(String *)p_message);
+}
+
+#ifdef __cplusplus
+}
+#endif