diff options
author | Juan Linietsky <reduzio@gmail.com> | 2014-02-09 22:10:30 -0300 |
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committer | Juan Linietsky <reduzio@gmail.com> | 2014-02-09 22:10:30 -0300 |
commit | 0b806ee0fc9097fa7bda7ac0109191c9c5e0a1ac (patch) | |
tree | 276c4d099e178eb67fbd14f61d77b05e3808e9e3 /core/method_bind.h | |
parent | 0e49da1687bc8192ed210947da52c9e5c5f301bb (diff) |
GODOT IS OPEN SOURCE
Diffstat (limited to 'core/method_bind.h')
-rw-r--r-- | core/method_bind.h | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/core/method_bind.h b/core/method_bind.h new file mode 100644 index 0000000000..3f08c70af8 --- /dev/null +++ b/core/method_bind.h @@ -0,0 +1,306 @@ +/*************************************************************************/ +/* method_bind.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ +/* */ +/* 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. */ +/*************************************************************************/ +#ifndef METHOD_BIND_H +#define METHOD_BIND_H + +#include "list.h" +#include "variant.h" +#include "object.h" +#include <stdio.h> + +/** + @author Juan Linietsky <reduzio@gmail.com> +*/ + +#ifdef DEBUG_ENABLED +#define DEBUG_METHODS_ENABLED +#endif + +enum MethodFlags { + + METHOD_FLAG_NORMAL=1, + METHOD_FLAG_EDITOR=2, + METHOD_FLAG_NOSCRIPT=4, + METHOD_FLAG_CONST=8, + METHOD_FLAG_REVERSE=16, // used for events + METHOD_FLAG_VIRTUAL=32, + METHOD_FLAGS_DEFAULT=METHOD_FLAG_NORMAL, +}; + +template<class T> +struct VariantCaster { + + static _FORCE_INLINE_ T cast(const Variant& p_variant) { + + return p_variant; + } +}; + +template<class T> +struct VariantCaster<T&> { + + static _FORCE_INLINE_ T cast(const Variant& p_variant) { + + return p_variant; + } +}; + +template<class T> +struct VariantCaster<const T&> { + + static _FORCE_INLINE_ T cast(const Variant& p_variant) { + + return p_variant; + } +}; + +#define _VC( m_idx )\ + (VariantCaster<P##m_idx>::cast( (m_idx-1)>=p_arg_count?get_default_argument(m_idx-1):*p_args[m_idx-1] )) + +//SIMPLE_NUMERIC_TYPE is used to avoid a warning on Variant::get_type_for +#define VARIANT_ENUM_CAST( m_enum ) \ +SIMPLE_NUMERIC_TYPE( m_enum );\ +template<> \ +struct VariantCaster<m_enum> {\ +\ + static _FORCE_INLINE_ m_enum cast(const Variant& p_variant) {\ + return (m_enum)p_variant.operator int();\ + }\ +}; + + +#define CHECK_ARG(m_arg)\ + if ((m_arg-1)<p_arg_count) {\ + Variant::Type argtype=get_argument_type(m_arg-1);\ + if (!Variant::can_convert(p_args[m_arg-1]->get_type(),argtype)) {\ + r_error.error=Variant::CallError::CALL_ERROR_INVALID_ARGUMENT;\ + r_error.argument=m_arg-1;\ + r_error.expected=argtype;\ + return Variant();\ + }\ + } + +#define CHECK_NOARG(m_arg)\ + {\ + if (p_arg##m_arg.get_type()!=Variant::NIL) {\ + if (r_argerror) *r_argerror=(m_arg-1);\ + return CALL_ERROR_EXTRA_ARGUMENT;\ + }\ + } + +// some helpers + +VARIANT_ENUM_CAST( Vector3::Axis ); +VARIANT_ENUM_CAST( Image::Format ); +VARIANT_ENUM_CAST( Error ); +VARIANT_ENUM_CAST( wchar_t ); +VARIANT_ENUM_CAST( Margin ); +VARIANT_ENUM_CAST( Orientation ); +VARIANT_ENUM_CAST( HAlign ); + +class MethodBind { + + + int method_id; + uint32_t hint_flags; + StringName name; + Vector<Variant> default_arguments; + int default_argument_count; + int argument_count; +#ifdef DEBUG_METHODS_ENABLED + Vector<StringName> arg_names; + Variant::Type *argument_types; + StringName ret_type; +#endif + bool _const; + + +protected: + + void _set_const(bool p_const); +#ifdef DEBUG_METHODS_ENABLED + virtual Variant::Type _gen_argument_type(int p_arg) const=0; + void _generate_argument_types(int p_count); + void set_argument_types(Variant::Type *p_types) { argument_types=p_types; } +#endif + void set_argument_count(int p_count) { argument_count=p_count; } +public: + + Vector<Variant> get_default_arguments() const { return default_arguments; } + _FORCE_INLINE_ int get_default_argument_count() const { return default_argument_count; } + + _FORCE_INLINE_ Variant has_default_argument(int p_arg) const { + + int idx=argument_count-p_arg-1; + + if (idx<0 || idx>=default_arguments.size()) + return false; + else + return true; + } + + _FORCE_INLINE_ Variant get_default_argument(int p_arg) const { + + int idx=argument_count-p_arg-1; + + if (idx<0 || idx>=default_arguments.size()) + return Variant(); + else + return default_arguments[idx]; + } + +#ifdef DEBUG_METHODS_ENABLED + + _FORCE_INLINE_ void set_return_type(const StringName& p_type) { ret_type=p_type; } + + _FORCE_INLINE_ Variant::Type get_argument_type(int p_argument) const { + + ERR_FAIL_COND_V(p_argument<-1 || p_argument>argument_count,Variant::NIL); + return argument_types[p_argument+1]; + + } + + PropertyInfo get_argument_info(int p_argument) const; + + void set_argument_names(const Vector<StringName>& p_names); + Vector<StringName> get_argument_names() const; +#endif + void set_hint_flags(uint32_t p_hint) { hint_flags=p_hint; } + uint32_t get_hint_flags() const { return hint_flags|(is_const()?METHOD_FLAG_CONST:0); } + virtual String get_instance_type() const=0; + + _FORCE_INLINE_ int get_argument_count() const { return argument_count; }; + +#if 0 + _FORCE_INLINE_ Variant call_safe(const Variant** p_args,int p_arg_count, Variant::CallError& r_error) { + + r_error.error=Variant::CallError::CALL_OK; + check_call( p_args, &errorarg ); + if (!err) + return call(p_object, VARIANT_ARG_PASS ); + + VARIANT_ARGPTRS + String errstr; + String methodname = get_instance_type()+"::"+name; + if (err==CALL_ERROR_ARGUMENT_TYPE) { + errstr="Invalid Argument to call: '"+methodname+"'. Cannot convert argument "+itos(errorarg+1)+" from "+Variant::get_type_name(get_argument_type(errorarg))+" to "+Variant::get_type_name(argptr[errorarg]->get_type())+"."; + } + if (err==CALL_ERROR_EXTRA_ARGUMENT) { + errstr="Invalid call. Member function '"+methodname+"' takes "+itos(get_argument_count())+" argument, but argument "+itos(errorarg+1)+" was received."; + } + + ERR_PRINT(errstr.ascii().get_data()); + return Variant(); + } +#endif + virtual Variant call(Object* p_object,const Variant** p_args,int p_arg_count, Variant::CallError& r_error)=0; + StringName get_name() const; + void set_name(const StringName& p_name); + _FORCE_INLINE_ int get_method_id() const { return method_id; } + _FORCE_INLINE_ bool is_const() const { return _const; } + + + void set_default_arguments(const Vector<Variant>& p_defargs); + + MethodBind(); + virtual ~MethodBind(); +}; + + +template<class T> +class MethodBindNative : public MethodBind { +public: + typedef Variant (T::*NativeCall)(const Variant**,int ,Variant::CallError &); +protected: + + NativeCall call_method; +public: + + virtual Variant::Type _gen_argument_type(int p_arg) const { + + return Variant::NIL; + } + + virtual Variant call(Object* p_object,const Variant** p_args,int p_arg_count, Variant::CallError& r_error) { + + T* instance=static_cast<T*>(p_object); + return (instance->*call_method)(p_args,p_arg_count,r_error); + } + void set_method_info(const MethodInfo& p_info) { + + + set_argument_count( p_info.arguments.size() ); +#ifdef DEBUG_METHODS_ENABLED + Variant::Type *at = memnew_arr( Variant::Type , p_info.arguments.size()+1 ); + at[0]=p_info.return_val.type; + if (p_info.arguments.size()) { + + Vector<StringName> names; + names.resize(p_info.arguments.size()); + for(int i=0;i<p_info.arguments.size();i++) { + + at[i+1]=p_info.arguments[i].type; + names[i]=p_info.arguments[i].name; + } + + set_argument_names(names); + } + set_argument_types(at); +#endif + } + + void set_method(NativeCall p_method) { call_method=p_method; } + virtual bool is_const() const { return false; } + virtual String get_instance_type() const { return T::get_type_static(); } + + MethodBindNative() { call_method=NULL; } +}; + + +template<class T > +MethodBind* create_native_method_bind( Variant (T::*p_method)(const Variant**,int ,Variant::CallError &), const MethodInfo& p_info ) { + + MethodBindNative<T > * a = memnew( (MethodBindNative<T >) ); + a->set_method(p_method); + a->set_method_info(p_info); + return a; +} + + +/** This amazing hack is based on the FastDelegates theory */ + +// tale of an amazing hack.. // + +// if you declare an unexisting class.. +class __UnexistingClass; + + +#include "method_bind.inc" + +#endif |