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godot/modules/mono/editor/bindings_generator.h

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/*************************************************************************/
/* bindings_generator.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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. */
/*************************************************************************/
#ifndef BINDINGS_GENERATOR_H
#define BINDINGS_GENERATOR_H
#include "core/class_db.h"
#include "core/string_builder.h"
#include "editor/doc/doc_data.h"
#include "editor/editor_help.h"
#if defined(DEBUG_METHODS_ENABLED) && defined(TOOLS_ENABLED)
#include "core/ustring.h"
class BindingsGenerator {
struct ConstantInterface {
String name;
String proxy_name;
int value;
const DocData::ConstantDoc *const_doc;
ConstantInterface() {}
ConstantInterface(const String &p_name, const String &p_proxy_name, int p_value) {
name = p_name;
proxy_name = p_proxy_name;
value = p_value;
}
};
struct EnumInterface {
StringName cname;
List<ConstantInterface> constants;
_FORCE_INLINE_ bool operator==(const EnumInterface &p_ienum) const {
return p_ienum.cname == cname;
}
EnumInterface() {}
EnumInterface(const StringName &p_cname) {
cname = p_cname;
}
};
struct PropertyInterface {
StringName cname;
String proxy_name;
int index;
StringName setter;
StringName getter;
const DocData::PropertyDoc *prop_doc;
};
struct TypeReference {
StringName cname;
bool is_enum;
TypeReference() :
is_enum(false) {
}
TypeReference(const StringName &p_cname) :
cname(p_cname),
is_enum(false) {
}
};
struct ArgumentInterface {
enum DefaultParamMode {
CONSTANT,
NULLABLE_VAL,
NULLABLE_REF
};
TypeReference type;
String name;
String default_argument;
DefaultParamMode def_param_mode;
ArgumentInterface() {
def_param_mode = CONSTANT;
}
};
struct MethodInterface {
String name;
StringName cname;
/**
* Name of the C# method
*/
String proxy_name;
/**
* [TypeInterface::name] of the return type
*/
TypeReference return_type;
/**
* Determines if the method has a variable number of arguments (VarArg)
*/
bool is_vararg;
/**
* Virtual methods ("virtual" as defined by the Godot API) are methods that by default do nothing,
* but can be overridden by the user to add custom functionality.
* e.g.: _ready, _process, etc.
*/
bool is_virtual;
/**
* Determines if the call should fallback to Godot's object.Call(string, params) in C#.
*/
bool requires_object_call;
/**
* Determines if the method visibility is 'internal' (visible only to files in the same assembly).
* Currently, we only use this for methods that are not meant to be exposed,
* but are required by properties as getters or setters.
* Methods that are not meant to be exposed are those that begin with underscore and are not virtual.
*/
bool is_internal;
List<ArgumentInterface> arguments;
const DocData::MethodDoc *method_doc;
bool is_deprecated;
String deprecation_message;
void add_argument(const ArgumentInterface &argument) {
arguments.push_back(argument);
}
MethodInterface() {
is_vararg = false;
is_virtual = false;
requires_object_call = false;
is_internal = false;
method_doc = NULL;
is_deprecated = false;
}
};
struct TypeInterface {
/**
* Identifier name for this type.
* Also used to format [c_out].
*/
String name;
StringName cname;
/**
* Identifier name of the base class.
*/
StringName base_name;
/**
* Name of the C# class
*/
String proxy_name;
ClassDB::APIType api_type;
bool is_enum;
bool is_object_type;
bool is_singleton;
bool is_reference;
/**
* Used only by Object-derived types.
* Determines if this type is not abstract (incomplete).
* e.g.: CanvasItem cannot be instantiated.
*/
bool is_instantiable;
/**
* Used only by Object-derived types.
* Determines if the C# class owns the native handle and must free it somehow when disposed.
* e.g.: Reference types must notify when the C# instance is disposed, for proper refcounting.
*/
bool memory_own;
/**
* This must be set to true for any struct bigger than 32-bits. Those cannot be passed/returned by value
* with internal calls, so we must use pointers instead. Returns must be replace with out parameters.
* In this case, [c_out] and [cs_out] must have a different format, explained below.
* The Mono IL interpreter icall trampolines don't support passing structs bigger than 32-bits by value (at least not on WASM).
*/
bool ret_as_byref_arg;
// !! The comments of the following fields make reference to other fields via square brackets, e.g.: [field_name]
// !! When renaming those fields, make sure to rename their references in the comments
// --- C INTERFACE ---
static const char *DEFAULT_VARARG_C_IN;
/**
* One or more statements that manipulate the parameter before being passed as argument of a ptrcall.
* If the statement adds a local that must be passed as the argument instead of the parameter,
* the name of that local must be specified with [c_arg_in].
* For variadic methods, this field is required and, if empty, [DEFAULT_VARARG_C_IN] is used instead.
* Formatting elements:
* %0: [c_type] of the parameter
* %1: name of the parameter
*/
String c_in;
/**
* Determines the expression that will be passed as argument to ptrcall.
* By default the value equals the name of the parameter,
* this varies for types that require special manipulation via [c_in].
* Formatting elements:
* %0 or %s: name of the parameter
*/
String c_arg_in;
/**
* One or more statements that determine how a variable of this type is returned from a function.
* It must contain the return statement(s).
* Formatting elements:
* %0: [c_type_out] of the return type
* %1: name of the variable to be returned
* %2: [name] of the return type
* ---------------------------------------
* If [ret_as_byref_arg] is true, the format is different. Instead of using a return statement,
* the value must be assigned to a parameter. This type of this parameter is a pointer to [c_type_out].
* Formatting elements:
* %0: [c_type_out] of the return type
* %1: name of the variable to be returned
* %2: [name] of the return type
* %3: name of the parameter that must be assigned the return value
*/
String c_out;
/**
* The actual expected type, as seen (in most cases) in Variant copy constructors
* Used for the type of the return variable and to format [c_in].
* The value must be the following depending of the type:
* Object-derived types: Object*
* Other types: [name]
* -- Exceptions --
* VarArg (fictitious type to represent variable arguments): Array
* float: double (because ptrcall only supports double)
* int: int64_t (because ptrcall only supports int64_t and uint64_t)
* Reference types override this for the type of the return variable: Ref<Reference>
*/
String c_type;
/**
* Determines the type used for parameters in function signatures.
*/
String c_type_in;
/**
* Determines the return type used for function signatures.
* Also used to construct a default value to return in case of errors,
* and to format [c_out].
*/
String c_type_out;
// --- C# INTERFACE ---
/**
* An expression that overrides the way the parameter is passed to the internal call.
* If empty, the parameter is passed as is.
* Formatting elements:
* %0 or %s: name of the parameter
*/
String cs_in;
/**
* One or more statements that determine how a variable of this type is returned from a method.
* It must contain the return statement(s).
* Formatting elements:
* %0: internal method name
* %1: internal method call arguments without surrounding parenthesis
* %2: [cs_type] of the return type
* %3: [im_type_out] of the return type
*/
String cs_out;
/**
* Type used for method signatures, both for parameters and the return type.
* Same as [proxy_name] except for variable arguments (VarArg) and collections (which include the namespace).
*/
String cs_type;
/**
* Type used for parameters of internal call methods.
*/
String im_type_in;
/**
* Type used for the return type of internal call methods.
*/
String im_type_out;
const DocData::ClassDoc *class_doc;
List<ConstantInterface> constants;
List<EnumInterface> enums;
List<PropertyInterface> properties;
List<MethodInterface> methods;
const MethodInterface *find_method_by_name(const StringName &p_cname) const {
for (const List<MethodInterface>::Element *E = methods.front(); E; E = E->next()) {
if (E->get().cname == p_cname)
return &E->get();
}
return NULL;
}
const PropertyInterface *find_property_by_name(const StringName &p_cname) const {
for (const List<PropertyInterface>::Element *E = properties.front(); E; E = E->next()) {
if (E->get().cname == p_cname)
return &E->get();
}
return NULL;
}
const PropertyInterface *find_property_by_proxy_name(const String &p_proxy_name) const {
for (const List<PropertyInterface>::Element *E = properties.front(); E; E = E->next()) {
if (E->get().proxy_name == p_proxy_name)
return &E->get();
}
return NULL;
}
private:
static void _init_value_type(TypeInterface &itype) {
itype.proxy_name = itype.name;
itype.c_type = itype.name;
itype.cs_type = itype.proxy_name;
itype.im_type_in = "ref " + itype.proxy_name;
itype.im_type_out = itype.proxy_name;
itype.class_doc = &EditorHelp::get_doc_data()->class_list[itype.proxy_name];
}
public:
static TypeInterface create_value_type(const String &p_name) {
TypeInterface itype;
itype.name = p_name;
itype.cname = StringName(p_name);
_init_value_type(itype);
return itype;
}
static TypeInterface create_value_type(const StringName &p_name) {
TypeInterface itype;
itype.name = p_name.operator String();
itype.cname = p_name;
_init_value_type(itype);
return itype;
}
static TypeInterface create_object_type(const StringName &p_cname, ClassDB::APIType p_api_type) {
TypeInterface itype;
itype.name = p_cname;
itype.cname = p_cname;
itype.proxy_name = itype.name.begins_with("_") ? itype.name.substr(1, itype.name.length()) : itype.name;
itype.api_type = p_api_type;
itype.is_object_type = true;
itype.class_doc = &EditorHelp::get_doc_data()->class_list[itype.proxy_name];
return itype;
}
static void create_placeholder_type(TypeInterface &r_itype, const StringName &p_cname) {
r_itype.name = p_cname;
r_itype.cname = p_cname;
r_itype.proxy_name = r_itype.name;
r_itype.c_type = r_itype.name;
r_itype.c_type_in = "MonoObject*";
r_itype.c_type_out = "MonoObject*";
r_itype.cs_type = r_itype.proxy_name;
r_itype.im_type_in = r_itype.proxy_name;
r_itype.im_type_out = r_itype.proxy_name;
}
static void postsetup_enum_type(TypeInterface &r_enum_itype) {
// C interface for enums is the same as that of 'uint32_t'. Remember to apply
// any of the changes done here to the 'uint32_t' type interface as well.
r_enum_itype.c_arg_in = "&%s_in";
{
// The expected types for parameters and return value in ptrcall are 'int64_t' or 'uint64_t'.
r_enum_itype.c_in = "\t%0 %1_in = (%0)%1;\n";
r_enum_itype.c_out = "\treturn (%0)%1;\n";
r_enum_itype.c_type = "int64_t";
}
r_enum_itype.c_type_in = "int32_t";
r_enum_itype.c_type_out = r_enum_itype.c_type_in;
r_enum_itype.cs_type = r_enum_itype.proxy_name;
r_enum_itype.cs_in = "(int)%s";
r_enum_itype.cs_out = "return (%2)%0(%1);";
r_enum_itype.im_type_in = "int";
r_enum_itype.im_type_out = "int";
r_enum_itype.class_doc = &EditorHelp::get_doc_data()->class_list[r_enum_itype.proxy_name];
}
TypeInterface() {
api_type = ClassDB::API_NONE;
is_enum = false;
is_object_type = false;
is_singleton = false;
is_reference = false;
is_instantiable = false;
memory_own = false;
ret_as_byref_arg = false;
c_arg_in = "%s";
class_doc = NULL;
}
};
struct InternalCall {
String name;
String im_type_out; // Return type for the C# method declaration. Also used as companion of [unique_siq]
String im_sig; // Signature for the C# method declaration
String unique_sig; // Unique signature to avoid duplicates in containers
bool editor_only;
InternalCall() {}
InternalCall(const String &p_name, const String &p_im_type_out, const String &p_im_sig = String(), const String &p_unique_sig = String()) {
name = p_name;
im_type_out = p_im_type_out;
im_sig = p_im_sig;
unique_sig = p_unique_sig;
editor_only = false;
}
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()) {
name = p_name;
im_type_out = p_im_type_out;
im_sig = p_im_sig;
unique_sig = p_unique_sig;
editor_only = api_type == ClassDB::API_EDITOR;
}
inline bool operator==(const InternalCall &p_a) const {
return p_a.unique_sig == unique_sig;
}
};
bool log_print_enabled;
bool initialized;
OrderedHashMap<StringName, TypeInterface> obj_types;
Map<StringName, TypeInterface> placeholder_types;
Map<StringName, TypeInterface> builtin_types;
Map<StringName, TypeInterface> enum_types;
List<EnumInterface> global_enums;
List<ConstantInterface> global_constants;
List<InternalCall> method_icalls;
Map<const MethodInterface *, const InternalCall *> method_icalls_map;
List<const InternalCall *> generated_icall_funcs;
List<InternalCall> core_custom_icalls;
List<InternalCall> editor_custom_icalls;
Map<StringName, List<StringName>> blacklisted_methods;
void _initialize_blacklisted_methods();
struct NameCache {
StringName type_void;
StringName type_Array;
StringName type_Dictionary;
StringName type_Variant;
StringName type_VarArg;
StringName type_Object;
StringName type_Reference;
StringName type_RID;
StringName type_String;
StringName type_NodePath;
StringName type_at_GlobalScope;
StringName enum_Error;
StringName type_sbyte;
StringName type_short;
StringName type_int;
StringName type_long;
StringName type_byte;
StringName type_ushort;
StringName type_uint;
StringName type_ulong;
StringName type_float;
StringName type_double;
NameCache() {
type_void = StaticCString::create("void");
type_Array = StaticCString::create("Array");
type_Dictionary = StaticCString::create("Dictionary");
type_Variant = StaticCString::create("Variant");
type_VarArg = StaticCString::create("VarArg");
type_Object = StaticCString::create("Object");
type_Reference = StaticCString::create("Reference");
type_RID = StaticCString::create("RID");
type_String = StaticCString::create("String");
type_NodePath = StaticCString::create("NodePath");
type_at_GlobalScope = StaticCString::create("@GlobalScope");
enum_Error = StaticCString::create("Error");
type_sbyte = StaticCString::create("sbyte");
type_short = StaticCString::create("short");
type_int = StaticCString::create("int");
type_long = StaticCString::create("long");
type_byte = StaticCString::create("byte");
type_ushort = StaticCString::create("ushort");
type_uint = StaticCString::create("uint");
type_ulong = StaticCString::create("ulong");
type_float = StaticCString::create("float");
type_double = StaticCString::create("double");
}
private:
NameCache(const NameCache &);
NameCache &operator=(const NameCache &);
};
NameCache name_cache;
const List<InternalCall>::Element *find_icall_by_name(const String &p_name, const List<InternalCall> &p_list) {
const List<InternalCall>::Element *it = p_list.front();
while (it) {
if (it->get().name == p_name)
return it;
it = it->next();
}
return NULL;
}
const ConstantInterface *find_constant_by_name(const String &p_name, const List<ConstantInterface> &p_constants) const {
for (const List<ConstantInterface>::Element *E = p_constants.front(); E; E = E->next()) {
if (E->get().name == p_name)
return &E->get();
}
return NULL;
}
inline String get_unique_sig(const TypeInterface &p_type) {
if (p_type.is_reference)
return "Ref";
else if (p_type.is_object_type)
return "Obj";
else if (p_type.is_enum)
return "int";
return p_type.name;
}
String bbcode_to_xml(const String &p_bbcode, const TypeInterface *p_itype);
int _determine_enum_prefix(const EnumInterface &p_ienum);
void _apply_prefix_to_enum_constants(EnumInterface &p_ienum, int p_prefix_length);
void _generate_method_icalls(const TypeInterface &p_itype);
const TypeInterface *_get_type_or_null(const TypeReference &p_typeref);
const TypeInterface *_get_type_or_placeholder(const TypeReference &p_typeref);
StringName _get_int_type_name_from_meta(GodotTypeInfo::Metadata p_meta);
StringName _get_float_type_name_from_meta(GodotTypeInfo::Metadata p_meta);
bool _arg_default_value_from_variant(const Variant &p_val, ArgumentInterface &r_iarg);
bool _populate_object_type_interfaces();
void _populate_builtin_type_interfaces();
void _populate_global_constants();
Error _generate_cs_type(const TypeInterface &itype, const String &p_output_file);
Error _generate_cs_property(const TypeInterface &p_itype, const PropertyInterface &p_iprop, StringBuilder &p_output);
Error _generate_cs_method(const TypeInterface &p_itype, const MethodInterface &p_imethod, int &p_method_bind_count, StringBuilder &p_output);
void _generate_global_constants(StringBuilder &p_output);
Error _generate_glue_method(const TypeInterface &p_itype, const MethodInterface &p_imethod, StringBuilder &p_output);
Error _save_file(const String &p_path, const StringBuilder &p_content);
void _log(const char *p_format, ...) _PRINTF_FORMAT_ATTRIBUTE_2_3;
void _initialize();
public:
Error generate_cs_core_project(const String &p_proj_dir);
Error generate_cs_editor_project(const String &p_proj_dir);
Error generate_cs_api(const String &p_output_dir);
Error generate_glue(const String &p_output_dir);
_FORCE_INLINE_ bool is_log_print_enabled() { return log_print_enabled; }
_FORCE_INLINE_ void set_log_print_enabled(bool p_enabled) { log_print_enabled = p_enabled; }
_FORCE_INLINE_ bool is_initialized() { return initialized; }
static uint32_t get_version();
static void handle_cmdline_args(const List<String> &p_cmdline_args);
BindingsGenerator() :
log_print_enabled(true),
initialized(false) {
_initialize();
}
};
#endif
#endif // BINDINGS_GENERATOR_H
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