437 lines
14 KiB
C++
437 lines
14 KiB
C++
/*************************************************************************/
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/* bindings_generator.h */
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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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 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 BINDINGS_GENERATOR_H
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#define BINDINGS_GENERATOR_H
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#include "class_db.h"
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#include "editor/doc/doc_data.h"
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#include "editor/editor_help.h"
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#ifdef DEBUG_METHODS_ENABLED
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#include "ustring.h"
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class BindingsGenerator {
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struct ArgumentInterface {
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enum DefaultParamMode {
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CONSTANT,
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NULLABLE_VAL,
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NULLABLE_REF
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};
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String type;
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String name;
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String default_argument;
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DefaultParamMode def_param_mode;
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ArgumentInterface() {
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def_param_mode = CONSTANT;
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}
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};
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struct MethodInterface {
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String name;
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/**
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* Name of the C# method
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*/
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String proxy_name;
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/**
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* [TypeInterface::name] of the return type
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*/
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String return_type;
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/**
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* Determines if the method has a variable number of arguments (VarArg)
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*/
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bool is_vararg;
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/**
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* Virtual methods ("virtual" as defined by the Godot API) are methods that by default do nothing,
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* but can be overridden by the user to add custom functionality.
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* e.g.: _ready, _process, etc.
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*/
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bool is_virtual;
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/**
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* Determines if the call should fallback to Godot's object.Call(string, params) in C#.
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*/
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bool requires_object_call;
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/**
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* Determines if the method visibility is `internal` (visible only to files in the same assembly).
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* Currently, we only use this for methods that are not meant to be exposed,
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* but are required by properties as getters or setters.
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* Methods that are not meant to be exposed are those that begin with underscore and are not virtual.
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*/
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bool is_internal;
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List<ArgumentInterface> arguments;
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const DocData::MethodDoc *method_doc;
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void add_argument(const ArgumentInterface &argument) {
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arguments.push_back(argument);
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}
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MethodInterface() {
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return_type = "void";
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is_vararg = false;
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is_virtual = false;
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requires_object_call = false;
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is_internal = false;
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method_doc = NULL;
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}
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};
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struct TypeInterface {
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/**
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* Identifier name for this type.
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* Also used to format [c_out].
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*/
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String name;
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/**
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* Identifier name of the base class.
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*/
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String base_name;
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/**
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* Name of the C# class
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*/
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String proxy_name;
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ClassDB::APIType api_type;
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bool is_object_type;
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bool is_singleton;
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bool is_reference;
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/**
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* Used only by Object-derived types.
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* Determines if this type is not virtual (incomplete).
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* e.g.: CanvasItem cannot be instantiated.
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*/
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bool is_instantiable;
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/**
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* Used only by Object-derived types.
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* Determines if the C# class owns the native handle and must free it somehow when disposed.
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* e.g.: Reference types must notify when the C# instance is disposed, for proper refcounting.
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*/
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bool memory_own;
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/**
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* Determines if the file must have a using directive for System.Collections.Generic
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* e.g.: When the generated class makes use of Dictionary
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*/
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bool requires_collections;
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// !! The comments of the following fields make reference to other fields via square brackets, e.g.: [field_name]
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// !! When renaming those fields, make sure to rename their references in the comments
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// --- C INTERFACE ---
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static const char *DEFAULT_VARARG_C_IN;
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/**
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* One or more statements that manipulate the parameter before being passed as argument of a ptrcall.
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* If the statement adds a local that must be passed as the argument instead of the parameter,
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* the name of that local must be specified with [c_arg_in].
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* For variadic methods, this field is required and, if empty, [DEFAULT_VARARG_C_IN] is used instead.
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* Formatting elements:
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* %0: [c_type] of the parameter
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* %1: name of the parameter
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*/
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String c_in;
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/**
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* Determines the name of the variable that will be passed as argument to a ptrcall.
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* By default the value equals the name of the parameter,
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* this varies for types that require special manipulation via [c_in].
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* Formatting elements:
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* %0 or %s: name of the parameter
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*/
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String c_arg_in;
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/**
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* One or more statements that determine how a variable of this type is returned from a function.
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* It must contain the return statement(s).
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* Formatting elements:
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* %0: [c_type_out] of the return type
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* %1: name of the variable to be returned
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* %2: [name] of the return type
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*/
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String c_out;
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/**
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* The actual expected type, as seen (in most cases) in Variant copy constructors
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* Used for the type of the return variable and to format [c_in].
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* The value must be the following depending of the type:
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* Object-derived types: Object*
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* Other types: [name]
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* -- Exceptions --
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* VarArg (fictitious type to represent variable arguments): Array
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* float: double (because ptrcall only supports double)
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* int: int64_t (because ptrcall only supports int64_t and uint64_t)
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* Reference types override this for the type of the return variable: Ref<Reference>
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*/
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String c_type;
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/**
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* Determines the type used for parameters in function signatures.
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*/
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String c_type_in;
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/**
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* Determines the return type used for function signatures.
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* Also used to construct a default value to return in case of errors,
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* and to format [c_out].
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*/
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String c_type_out;
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// --- C# INTERFACE ---
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/**
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* An expression that overrides the way the parameter is passed to the internal call.
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* If empty, the parameter is passed as is.
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* Formatting elements:
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* %0 or %s: name of the parameter
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*/
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String cs_in;
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/**
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* One or more statements that determine how a variable of this type is returned from a method.
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* It must contain the return statement(s).
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* Formatting elements:
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* %0 or %s: name of the variable to be returned
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*/
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String cs_out;
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/**
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* Type used for method signatures, both for parameters and the return type.
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* Same as [proxy_name] except for variable arguments (VarArg).
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*/
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String cs_type;
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/**
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* Type used for parameters of internal call methods.
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*/
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String im_type_in;
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/**
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* Type used for the return type of internal call methods.
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* If [cs_out] is not empty and the method return type is not void,
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* it is also used for the type of the return variable.
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*/
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String im_type_out;
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const DocData::ClassDoc *class_doc;
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List<MethodInterface> methods;
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const MethodInterface *find_method_by_name(const String &p_name) const {
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for (const List<MethodInterface>::Element *E = methods.front(); E; E = E->next()) {
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if (E->get().name == p_name)
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return &E->get();
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}
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return NULL;
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}
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static TypeInterface create_value_type(const String &p_name) {
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TypeInterface itype;
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itype.name = p_name;
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itype.proxy_name = p_name;
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itype.c_type = itype.name;
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itype.c_type_in = "void*";
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itype.c_type_out = "MonoObject*";
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itype.cs_type = itype.proxy_name;
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itype.im_type_in = "ref " + itype.proxy_name;
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itype.im_type_out = itype.proxy_name;
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itype.class_doc = &EditorHelp::get_doc_data()->class_list[itype.proxy_name];
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return itype;
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}
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static TypeInterface create_object_type(const String &p_name, ClassDB::APIType p_api_type) {
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TypeInterface itype;
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itype.name = p_name;
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itype.proxy_name = p_name.begins_with("_") ? p_name.substr(1, p_name.length()) : p_name;
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itype.api_type = p_api_type;
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itype.is_object_type = true;
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itype.class_doc = &EditorHelp::get_doc_data()->class_list[itype.proxy_name];
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return itype;
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}
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static void create_placeholder_type(TypeInterface &r_itype, const String &p_name) {
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r_itype.name = p_name;
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r_itype.proxy_name = p_name;
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r_itype.c_type = r_itype.name;
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r_itype.c_type_in = "MonoObject*";
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r_itype.c_type_out = "MonoObject*";
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r_itype.cs_type = r_itype.proxy_name;
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r_itype.im_type_in = r_itype.proxy_name;
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r_itype.im_type_out = r_itype.proxy_name;
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}
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TypeInterface() {
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api_type = ClassDB::API_NONE;
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is_object_type = false;
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is_singleton = false;
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is_reference = false;
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is_instantiable = false;
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memory_own = false;
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requires_collections = false;
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c_arg_in = "%s";
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class_doc = NULL;
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}
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};
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struct InternalCall {
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String name;
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String im_type_out; // Return type for the C# method declaration. Also used as companion of [unique_siq]
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String im_sig; // Signature for the C# method declaration
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String unique_sig; // Unique signature to avoid duplicates in containers
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bool editor_only;
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InternalCall() {}
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InternalCall(const String &p_name, const String &p_im_type_out, const String &p_im_sig = String(), const String &p_unique_sig = String()) {
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name = p_name;
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im_type_out = p_im_type_out;
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im_sig = p_im_sig;
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unique_sig = p_unique_sig;
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editor_only = false;
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}
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InternalCall(ClassDB::APIType api_type, const String &p_name, const String &p_im_type_out, const String &p_im_sig = String(), const String &p_unique_sig = String()) {
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name = p_name;
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im_type_out = p_im_type_out;
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im_sig = p_im_sig;
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unique_sig = p_unique_sig;
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editor_only = api_type == ClassDB::API_EDITOR;
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}
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inline bool operator==(const InternalCall &p_a) const {
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return p_a.unique_sig == unique_sig;
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}
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};
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static bool verbose_output;
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Map<String, TypeInterface> placeholder_types;
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Map<String, TypeInterface> builtin_types;
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Map<String, TypeInterface> obj_types;
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Map<String, String> extra_members;
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List<InternalCall> method_icalls;
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Map<const MethodInterface *, const InternalCall *> method_icalls_map;
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List<const InternalCall *> generated_icall_funcs;
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List<InternalCall> core_custom_icalls;
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List<InternalCall> editor_custom_icalls;
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const List<InternalCall>::Element *find_icall_by_name(const String &p_name, const List<InternalCall> &p_list) {
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const List<InternalCall>::Element *it = p_list.front();
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while (it) {
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if (it->get().name == p_name) return it;
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it = it->next();
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}
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return NULL;
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}
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inline String get_unique_sig(const TypeInterface &p_type) {
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if (p_type.is_reference)
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return "Ref";
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else if (p_type.is_object_type)
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return "Obj";
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return p_type.name;
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}
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void _generate_header_icalls();
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void _generate_method_icalls(const TypeInterface &p_itype);
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const TypeInterface *_get_type_by_name_or_null(const String &p_name);
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const TypeInterface *_get_type_by_name_or_placeholder(const String &p_name);
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void _default_argument_from_variant(const Variant &p_var, ArgumentInterface &r_iarg);
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void _populate_builtin_type(TypeInterface &r_type, Variant::Type vtype);
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void _populate_object_type_interfaces();
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void _populate_builtin_type_interfaces();
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Error _generate_cs_type(const TypeInterface &itype, const String &p_output_file);
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Error _generate_cs_property(const TypeInterface &p_itype, const DocData::PropertyDoc &p_prop_doc, List<String> &p_output);
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Error _generate_cs_method(const TypeInterface &p_itype, const MethodInterface &p_imethod, int &p_method_bind_count, List<String> &p_output);
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Error _generate_glue_method(const TypeInterface &p_itype, const MethodInterface &p_imethod, List<String> &p_output);
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Error _save_file(const String &path, const List<String> &content);
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BindingsGenerator();
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BindingsGenerator(const BindingsGenerator &);
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BindingsGenerator &operator=(const BindingsGenerator &);
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public:
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Error generate_cs_core_project(const String &p_output_dir, bool p_verbose_output = true);
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Error generate_cs_editor_project(const String &p_output_dir, const String &p_core_dll_path, bool p_verbose_output = true);
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Error generate_glue(const String &p_output_dir);
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static BindingsGenerator &get_singleton() {
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static BindingsGenerator singleton;
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return singleton;
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}
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static void handle_cmdline_args(const List<String> &p_cmdline_args);
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};
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#endif
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#endif // BINDINGS_GENERATOR_H
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