540 lines
19 KiB
C++
540 lines
19 KiB
C++
/*************************************************************************/
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/* method_bind.hpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef GODOT_CPP_METHOD_BIND_HPP
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#define GODOT_CPP_METHOD_BIND_HPP
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#include <godot_cpp/core/binder_common.hpp>
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#include <godot_cpp/core/type_info.hpp>
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#include <godot_cpp/core/memory.hpp>
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#include <godot/gdnative_interface.h>
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#include <godot_cpp/classes/global_constants.hpp>
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#include <string>
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#include <vector>
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#include <iostream>
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namespace godot {
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class MethodBind {
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const char *name = nullptr;
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const char *instance_class = nullptr;
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int argument_count = 0;
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uint32_t hint_flags = METHOD_FLAGS_DEFAULT;
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bool _is_const = false;
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bool _has_return = false;
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std::vector<std::string> argument_names;
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GDNativeVariantType *argument_types = nullptr;
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std::vector<Variant> default_arguments;
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protected:
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virtual GDNativeVariantType gen_argument_type(int p_arg) const = 0;
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const = 0;
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void generate_argument_types(int p_count);
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void set_const(bool p_const);
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void set_return(bool p_return);
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void set_argument_count(int p_count);
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public:
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const char *get_name() const;
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void set_name(const char *p_name);
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_FORCE_INLINE_ int get_default_argument_count() const { return default_arguments.size(); }
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_FORCE_INLINE_ const std::vector<Variant> &get_default_arguments() const { return default_arguments; }
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_FORCE_INLINE_ Variant has_default_argument(int p_arg) const {
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int idx = p_arg - (argument_count - default_arguments.size());
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if (idx < 0 || idx >= default_arguments.size()) {
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return false;
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} else {
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return true;
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}
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}
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_FORCE_INLINE_ Variant get_default_argument(int p_arg) const {
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int idx = p_arg - (argument_count - default_arguments.size());
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if (idx < 0 || idx >= default_arguments.size()) {
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return Variant();
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} else {
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return default_arguments[idx];
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}
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}
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_FORCE_INLINE_ const char *get_instance_class() const { return instance_class; }
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_FORCE_INLINE_ void set_instance_class(const char *p_class) { instance_class = p_class; }
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_FORCE_INLINE_ int get_argument_count() const { return argument_count; };
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_FORCE_INLINE_ bool is_const() const { return _is_const; }
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_FORCE_INLINE_ bool has_return() const { return _has_return; }
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_FORCE_INLINE_ uint32_t get_hint_flags() const { return hint_flags; }
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_FORCE_INLINE_ void set_hint_flags(uint32_t p_hint_flags) { hint_flags = p_hint_flags; }
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void set_argument_names(const std::vector<std::string> &p_names);
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std::vector<std::string> get_argument_names() const;
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void set_default_arguments(const std::vector<Variant> &p_default_arguments) { default_arguments = p_default_arguments; }
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_FORCE_INLINE_ GDNativeVariantType get_argument_type(int p_argument) const {
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ERR_FAIL_COND_V(p_argument < -1 || p_argument > argument_count, GDNATIVE_VARIANT_TYPE_NIL);
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return argument_types[p_argument + 1];
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}
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GDNativePropertyInfo get_argument_info(int p_argument) const;
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const = 0;
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const = 0;
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_return) const = 0;
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// Extension info.
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static GDNativeVariantType bind_get_argument_type(void *p_method_userdata, int32_t p_argument);
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static void bind_get_argument_info(void *p_method_userdata, int32_t p_argument, GDNativePropertyInfo *r_info);
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static GDNativeExtensionClassMethodArgumentMetadata bind_get_argument_metadata(void *p_method_userdata, int32_t p_argument);
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static void bind_call(void *p_method_userdata, GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeVariantPtr r_return, GDNativeCallError *r_error);
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static void bind_ptrcall(void *p_method_userdata, GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_return);
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virtual ~MethodBind();
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};
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template <class T>
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class MethodBindVarArg : public MethodBind {
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public:
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typedef Variant (T::*NativeCall)(const Variant **, GDNativeInt, GDNativeCallError &);
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protected:
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NativeCall call_method = nullptr;
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MethodInfo arguments;
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public:
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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if (p_arg < 0) {
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return arguments.return_val;
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} else if (p_arg < arguments.arguments.size()) {
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return arguments.arguments[p_arg];
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} else {
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return PropertyInfo(Variant::NIL, "vararg", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT);
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}
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}
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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return static_cast<GDNativeVariantType>(gen_argument_type_info(p_arg).type);
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}
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int) const {
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return GDNATIVE_EXTENSION_METHOD_ARGUMENT_METADATA_NONE;
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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T *instance = static_cast<T *>(p_instance);
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return (instance->*call_method)((const Variant **)p_args, p_argument_count, r_error);
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}
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void set_method_info(const MethodInfo &p_info, bool p_return_nil_is_variant) {
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set_argument_count(p_info.arguments.size());
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if (p_info.arguments.size()) {
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std::vector<std::string> names;
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names.reserve(p_info.arguments.size());
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for (int i = 0; i < p_info.arguments.size(); i++) {
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names.push_back(p_info.arguments[i].name);
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}
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set_argument_names(names);
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}
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arguments = p_info;
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if (p_return_nil_is_variant) {
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arguments.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
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}
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generate_argument_types(p_info.arguments.size());
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_return) const {
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ERR_FAIL(); // Can't call.
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}
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void set_method(NativeCall p_method) { call_method = p_method; }
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virtual bool is_const() const { return false; }
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virtual bool is_vararg() const { return true; }
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MethodBindVarArg() {
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set_return(true);
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}
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};
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template <class T>
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MethodBind *create_vararg_method_bind(Variant (T::*p_method)(const Variant **, GDNativeInt, GDNativeCallError &), const MethodInfo &p_info, bool p_return_nil_is_variant) {
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MethodBindVarArg<T> *a = memnew(MethodBindVarArg<T>());
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a->set_method(p_method);
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a->set_method_info(p_info, p_return_nil_is_variant);
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a->set_instance_class(T::get_class_static());
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return a;
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}
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#ifndef TYPED_METHOD_BIND
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class ___UnexistingClass;
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#define MB_T ___UnexistingClass
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#else
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#define MB_T T
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#endif
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// No return, not const.
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#ifdef TYPED_METHOD_BIND
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template <class T, class... P>
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#else
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template <class... P>
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#endif // TYPED_METHOD_BIND
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class MethodBindT : public MethodBind {
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void (MB_T::*method)(P...);
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protected:
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GDNATIVE_VARIANT_TYPE_NIL;
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}
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}
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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GDNativePropertyInfo pi;
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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call_get_argument_type_info<P...>(p_arg, pi);
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} else {
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pi = PropertyInfo();
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}
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return pi;
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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public:
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
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return call_get_argument_metadata<P...>(p_argument);
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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#ifdef TYPED_METHOD_BIND
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call_with_variant_args_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#else
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call_with_variant_args_dv(reinterpret_cast<MB_T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#endif
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return Variant();
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, P...>(static_cast<T *>(p_instance), method, p_args, nullptr);
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#else
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call_with_ptr_args<MB_T, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, nullptr);
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#endif // TYPED_METHOD_BIND
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}
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MethodBindT(void (MB_T::*p_method)(P...)) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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generate_argument_types(sizeof...(P));
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#endif // DEBUG_METHODS_ENABLED
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set_argument_count(sizeof...(P));
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}
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};
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template <class T, class... P>
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MethodBind *create_method_bind(void (T::*p_method)(P...)) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindT<T, P...>)(p_method));
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#else
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MethodBind *a = memnew((MethodBindT<P...>)(reinterpret_cast<void (MB_T::*)(P...)>(p_method)));
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#endif // TYPED_METHOD_BIND
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a->set_instance_class(T::get_class_static());
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return a;
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}
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// No return, const.
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#ifdef TYPED_METHOD_BIND
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template <class T, class... P>
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#else
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template <class... P>
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#endif // TYPED_METHOD_BIND
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class MethodBindTC : public MethodBind {
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void (MB_T::*method)(P...) const;
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protected:
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GDNATIVE_VARIANT_TYPE_NIL;
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}
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}
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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GDNativePropertyInfo pi;
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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call_get_argument_type_info<P...>(p_arg, pi);
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} else {
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pi = PropertyInfo();
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}
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return pi;
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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public:
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
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return call_get_argument_metadata<P...>(p_argument);
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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#ifdef TYPED_METHOD_BIND
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call_with_variant_argsc_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#else
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call_with_variant_argsc_dv(reinterpret_cast<MB_T *>(p_instance), method, p_args, p_argument_count, r_error, get_default_arguments());
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#endif
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return Variant();
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, P...>(static_cast<T *>(p_instance), method, p_args, nullptr);
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#else
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call_with_ptr_args<MB_T, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, nullptr);
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#endif // TYPED_METHOD_BIND
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}
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MethodBindTC(void (MB_T::*p_method)(P...) const) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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generate_argument_types(sizeof...(P));
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#endif // DEBUG_METHODS_ENABLED
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set_argument_count(sizeof...(P));
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}
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};
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template <class T, class... P>
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MethodBind *create_method_bind(void (T::*p_method)(P...) const) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindTC<T, P...>)(p_method));
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#else
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MethodBind *a = memnew((MethodBindTC<P...>)(reinterpret_cast<void (MB_T::*)(P...) const>(p_method)));
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#endif // TYPED_METHOD_BIND
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a->set_instance_class(T::get_class_static());
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return a;
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}
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// Return, not const.
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#ifdef TYPED_METHOD_BIND
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template <class T, class R, class... P>
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#else
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template <class R, class... P>
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#endif // TYPED_METHOD_BIND
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class MethodBindTR : public MethodBind {
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R(MB_T::*method)
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(P...);
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protected:
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// GCC raises warnings in the case P = {} as the comparison is always false...
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlogical-op"
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#endif
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virtual GDNativeVariantType gen_argument_type(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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return call_get_argument_type<P...>(p_arg);
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} else {
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return GetTypeInfo<R>::VARIANT_TYPE;
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}
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}
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virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
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if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
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GDNativePropertyInfo pi;
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call_get_argument_type_info<P...>(p_arg, pi);
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return pi;
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} else {
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return GetTypeInfo<R>::get_class_info();
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}
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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public:
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virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
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if (p_argument >= 0) {
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return call_get_argument_metadata<P...>(p_argument);
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} else {
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return GetTypeInfo<R>::METADATA;
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}
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}
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virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
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Variant ret;
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#ifdef TYPED_METHOD_BIND
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call_with_variant_args_ret_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, ret, r_error, get_default_arguments());
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#else
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call_with_variant_args_ret_dv((MB_T *)p_instance, method, p_args, p_argument_count, ret, r_error, get_default_arguments());
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#endif
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return ret;
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}
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virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
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#ifdef TYPED_METHOD_BIND
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call_with_ptr_args<T, R, P...>(static_cast<T *>(p_instance), method, p_args, r_ret);
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#else
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call_with_ptr_args<MB_T, R, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, r_ret);
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#endif // TYPED_METHOD_BIND
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}
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MethodBindTR(R (MB_T::*p_method)(P...)) {
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method = p_method;
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#ifdef DEBUG_METHODS_ENABLED
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generate_argument_types(sizeof...(P));
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#endif // DEBUG_METHODS_ENABLED
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set_argument_count(sizeof...(P));
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set_return(true);
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}
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};
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template <class T, class R, class... P>
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MethodBind *create_method_bind(R (T::*p_method)(P...)) {
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#ifdef TYPED_METHOD_BIND
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MethodBind *a = memnew((MethodBindTR<T, R, P...>)(p_method));
|
|
#else
|
|
MethodBind *a = memnew((MethodBindTR<R, P...>)(reinterpret_cast<R (MB_T::*)(P...)>(p_method)));
|
|
#endif // TYPED_METHOD_BIND
|
|
a->set_instance_class(T::get_class_static());
|
|
return a;
|
|
}
|
|
|
|
// Return, const.
|
|
|
|
#ifdef TYPED_METHOD_BIND
|
|
template <class T, class R, class... P>
|
|
#else
|
|
template <class R, class... P>
|
|
#endif // TYPED_METHOD_BIND
|
|
class MethodBindTRC : public MethodBind {
|
|
R(MB_T::*method)
|
|
(P...) const;
|
|
|
|
protected:
|
|
// GCC raises warnings in the case P = {} as the comparison is always false...
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wlogical-op"
|
|
#endif
|
|
virtual GDNativeVariantType gen_argument_type(int p_arg) const {
|
|
if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
|
|
return call_get_argument_type<P...>(p_arg);
|
|
} else {
|
|
return GetTypeInfo<R>::VARIANT_TYPE;
|
|
}
|
|
}
|
|
|
|
virtual GDNativePropertyInfo gen_argument_type_info(int p_arg) const {
|
|
if (p_arg >= 0 && p_arg < (int)sizeof...(P)) {
|
|
GDNativePropertyInfo pi;
|
|
call_get_argument_type_info<P...>(p_arg, pi);
|
|
return pi;
|
|
} else {
|
|
return GetTypeInfo<R>::get_class_info();
|
|
}
|
|
}
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
public:
|
|
virtual GDNativeExtensionClassMethodArgumentMetadata get_argument_metadata(int p_argument) const {
|
|
if (p_argument >= 0) {
|
|
return call_get_argument_metadata<P...>(p_argument);
|
|
} else {
|
|
return GetTypeInfo<R>::METADATA;
|
|
}
|
|
}
|
|
|
|
virtual Variant call(GDExtensionClassInstancePtr p_instance, const GDNativeVariantPtr *p_args, const GDNativeInt p_argument_count, GDNativeCallError &r_error) const {
|
|
Variant ret;
|
|
#ifdef TYPED_METHOD_BIND
|
|
call_with_variant_args_retc_dv(static_cast<T *>(p_instance), method, p_args, p_argument_count, ret, r_error, get_default_arguments());
|
|
#else
|
|
call_with_variant_args_retc_dv((MB_T *)p_instance, method, p_args, p_argument_count, ret, r_error, get_default_arguments());
|
|
#endif
|
|
return ret;
|
|
}
|
|
virtual void ptrcall(GDExtensionClassInstancePtr p_instance, const GDNativeTypePtr *p_args, GDNativeTypePtr r_ret) const {
|
|
#ifdef TYPED_METHOD_BIND
|
|
call_with_ptr_args<T, R, P...>(static_cast<T *>(p_instance), method, p_args, r_ret);
|
|
#else
|
|
call_with_ptr_args<MB_T, R, P...>(reinterpret_cast<MB_T *>(p_instance), method, p_args, r_ret);
|
|
#endif // TYPED_METHOD_BIND
|
|
}
|
|
|
|
MethodBindTRC(R (MB_T::*p_method)(P...) const) {
|
|
method = p_method;
|
|
#ifdef DEBUG_METHODS_ENABLED
|
|
generate_argument_types(sizeof...(P));
|
|
#endif // DEBUG_METHODS_ENABLED
|
|
set_argument_count(sizeof...(P));
|
|
set_return(true);
|
|
}
|
|
};
|
|
|
|
template <class T, class R, class... P>
|
|
MethodBind *create_method_bind(R (T::*p_method)(P...) const) {
|
|
#ifdef TYPED_METHOD_BIND
|
|
MethodBind *a = memnew((MethodBindTRC<T, R, P...>)(p_method));
|
|
#else
|
|
MethodBind *a = memnew((MethodBindTRC<R, P...>)(reinterpret_cast<R (MB_T::*)(P...) const>(p_method)));
|
|
#endif // TYPED_METHOD_BIND
|
|
a->set_instance_class(T::get_class_static());
|
|
return a;
|
|
}
|
|
|
|
} // namespace godot
|
|
|
|
#endif // ! GODOT_CPP_METHOD_BIND_HPP
|