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binding_generator.py
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binding_generator.py
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#!/usr/bin/env python
import json
import re
import shutil
from pathlib import Path
def generate_mod_version(argcount, const=False, returns=False):
s = """
#define MODBIND$VER($RETTYPE m_name$ARG) \\
virtual $RETVAL _##m_name($FUNCARGS) $CONST override; \\
"""
sproto = str(argcount)
if returns:
sproto += "R"
s = s.replace("$RETTYPE", "m_ret, ")
s = s.replace("$RETVAL", "m_ret")
else:
s = s.replace("$RETTYPE", "")
s = s.replace("$RETVAL", "void")
if const:
sproto += "C"
s = s.replace("$CONST", "const")
else:
s = s.replace("$CONST", "")
s = s.replace("$VER", sproto)
argtext = ""
funcargs = ""
for i in range(argcount):
if i > 0:
funcargs += ", "
argtext += ", m_type" + str(i + 1)
funcargs += "m_type" + str(i + 1) + " arg" + str(i + 1)
if argcount:
s = s.replace("$ARG", argtext)
s = s.replace("$FUNCARGS", funcargs)
else:
s = s.replace("$ARG", "")
s = s.replace("$FUNCARGS", funcargs)
return s
def generate_wrappers(target):
max_versions = 12
txt = """
#ifndef GDEXTENSION_WRAPPERS_GEN_H
#define GDEXTENSION_WRAPPERS_GEN_H
"""
for i in range(max_versions + 1):
txt += "\n/* Module Wrapper " + str(i) + " Arguments */\n"
txt += generate_mod_version(i, False, False)
txt += generate_mod_version(i, False, True)
txt += generate_mod_version(i, True, False)
txt += generate_mod_version(i, True, True)
txt += "\n#endif\n"
with open(target, "w", encoding="utf-8") as f:
f.write(txt)
def generate_virtual_version(argcount, const=False, returns=False):
s = """#define GDVIRTUAL$VER($RET m_name $ARG)\\
::godot::StringName _gdvirtual_##m_name##_sn = #m_name;\\
template <bool required>\\
_FORCE_INLINE_ bool _gdvirtual_##m_name##_call($CALLARGS) $CONST {\\
if (::godot::internal::gdextension_interface_object_has_script_method(_owner, &_gdvirtual_##m_name##_sn)) { \\
GDExtensionCallError ce;\\
$CALLSIARGS\\
::godot::Variant ret;\\
::godot::internal::gdextension_interface_object_call_script_method(_owner, &_gdvirtual_##m_name##_sn, $CALLSIARGPASS, &ret, &ce);\\
if (ce.error == GDEXTENSION_CALL_OK) {\\
$CALLSIRET\\
return true;\\
}\\
}\\
if (required) {\\
ERR_PRINT_ONCE("Required virtual method " + get_class() + "::" + #m_name + " must be overridden before calling.");\\
$RVOID\\
}\\
return false;\\
}\\
_FORCE_INLINE_ bool _gdvirtual_##m_name##_overridden() const {\\
return ::godot::internal::gdextension_interface_object_has_script_method(_owner, &_gdvirtual_##m_name##_sn); \\
}\\
_FORCE_INLINE_ static ::godot::MethodInfo _gdvirtual_##m_name##_get_method_info() {\\
::godot::MethodInfo method_info;\\
method_info.name = #m_name;\\
method_info.flags = $METHOD_FLAGS;\\
$FILL_METHOD_INFO\\
return method_info;\\
}
"""
sproto = str(argcount)
method_info = ""
if returns:
sproto += "R"
s = s.replace("$RET", "m_ret,")
s = s.replace("$RVOID", "(void)r_ret;") # If required, may lead to uninitialized errors
method_info += "method_info.return_val = ::godot::GetTypeInfo<m_ret>::get_class_info();\\\n"
method_info += "\t\tmethod_info.return_val_metadata = ::godot::GetTypeInfo<m_ret>::METADATA;"
else:
s = s.replace("$RET ", "")
s = s.replace("\t\t\t$RVOID\\\n", "")
if const:
sproto += "C"
s = s.replace("$CONST", "const")
s = s.replace("$METHOD_FLAGS", "::godot::METHOD_FLAG_VIRTUAL | ::godot::METHOD_FLAG_CONST")
else:
s = s.replace("$CONST ", "")
s = s.replace("$METHOD_FLAGS", "::godot::METHOD_FLAG_VIRTUAL")
s = s.replace("$VER", sproto)
argtext = ""
callargtext = ""
callsiargs = ""
callsiargptrs = ""
if argcount > 0:
argtext += ", "
callsiargs = f"::godot::Variant vargs[{argcount}] = {{ "
callsiargptrs = f"\t\t\tconst ::godot::Variant *vargptrs[{argcount}] = {{ "
for i in range(argcount):
if i > 0:
argtext += ", "
callargtext += ", "
callsiargs += ", "
callsiargptrs += ", "
argtext += f"m_type{i + 1}"
callargtext += f"m_type{i + 1} arg{i + 1}"
callsiargs += f"::godot::Variant(arg{i + 1})"
callsiargptrs += f"&vargs[{i}]"
if method_info:
method_info += "\\\n\t\t"
method_info += f"method_info.arguments.push_back(::godot::GetTypeInfo<m_type{i + 1}>::get_class_info());\\\n"
method_info += f"\t\tmethod_info.arguments_metadata.push_back(::godot::GetTypeInfo<m_type{i + 1}>::METADATA);"
if argcount:
callsiargs += " };\\\n"
callsiargptrs += " };"
s = s.replace("$CALLSIARGS", callsiargs + callsiargptrs)
s = s.replace("$CALLSIARGPASS", f"(const GDExtensionConstVariantPtr *)vargptrs, {argcount}")
else:
s = s.replace("\t\t\t$CALLSIARGS\\\n", "")
s = s.replace("$CALLSIARGPASS", "nullptr, 0")
if returns:
if argcount > 0:
callargtext += ", "
callargtext += "m_ret &r_ret"
s = s.replace("$CALLSIRET", "r_ret = ::godot::VariantCaster<m_ret>::cast(ret);")
else:
s = s.replace("\t\t\t\t$CALLSIRET\\\n", "")
s = s.replace(" $ARG", argtext)
s = s.replace("$CALLARGS", callargtext)
if method_info:
s = s.replace("$FILL_METHOD_INFO", method_info)
else:
s = s.replace("\t\t$FILL_METHOD_INFO\\\n", method_info)
return s
def generate_virtuals(target):
max_versions = 12
txt = """/* THIS FILE IS GENERATED DO NOT EDIT */
#ifndef GDEXTENSION_GDVIRTUAL_GEN_H
#define GDEXTENSION_GDVIRTUAL_GEN_H
"""
for i in range(max_versions + 1):
txt += f"/* {i} Arguments */\n\n"
txt += generate_virtual_version(i, False, False)
txt += generate_virtual_version(i, False, True)
txt += generate_virtual_version(i, True, False)
txt += generate_virtual_version(i, True, True)
txt += "#endif // GDEXTENSION_GDVIRTUAL_GEN_H\n"
with open(target, "w", encoding="utf-8") as f:
f.write(txt)
def get_file_list(api_filepath, output_dir, headers=False, sources=False):
api = {}
files = []
with open(api_filepath, encoding="utf-8") as api_file:
api = json.load(api_file)
core_gen_folder = Path(output_dir) / "gen" / "include" / "godot_cpp" / "core"
include_gen_folder = Path(output_dir) / "gen" / "include" / "godot_cpp"
source_gen_folder = Path(output_dir) / "gen" / "src"
files.append(str((core_gen_folder / "ext_wrappers.gen.inc").as_posix()))
files.append(str((core_gen_folder / "gdvirtual.gen.inc").as_posix()))
for builtin_class in api["builtin_classes"]:
if is_pod_type(builtin_class["name"]):
continue
if is_included_type(builtin_class["name"]):
continue
header_filename = include_gen_folder / "variant" / (camel_to_snake(builtin_class["name"]) + ".hpp")
source_filename = source_gen_folder / "variant" / (camel_to_snake(builtin_class["name"]) + ".cpp")
if headers:
files.append(str(header_filename.as_posix()))
if sources:
files.append(str(source_filename.as_posix()))
for engine_class in api["classes"]:
# Generate code for the ClassDB singleton under a different name.
if engine_class["name"] == "ClassDB":
engine_class["name"] = "ClassDBSingleton"
engine_class["alias_for"] = "ClassDB"
header_filename = include_gen_folder / "classes" / (camel_to_snake(engine_class["name"]) + ".hpp")
source_filename = source_gen_folder / "classes" / (camel_to_snake(engine_class["name"]) + ".cpp")
if headers:
files.append(str(header_filename.as_posix()))
if sources:
files.append(str(source_filename.as_posix()))
for native_struct in api["native_structures"]:
struct_name = native_struct["name"]
if struct_name == "ObjectID":
continue
snake_struct_name = camel_to_snake(struct_name)
header_filename = include_gen_folder / "classes" / (snake_struct_name + ".hpp")
if headers:
files.append(str(header_filename.as_posix()))
if headers:
for path in [
include_gen_folder / "variant" / "builtin_types.hpp",
include_gen_folder / "variant" / "builtin_binds.hpp",
include_gen_folder / "variant" / "utility_functions.hpp",
include_gen_folder / "variant" / "variant_size.hpp",
include_gen_folder / "variant" / "builtin_vararg_methods.hpp",
include_gen_folder / "classes" / "global_constants.hpp",
include_gen_folder / "classes" / "global_constants_binds.hpp",
include_gen_folder / "core" / "version.hpp",
]:
files.append(str(path.as_posix()))
if sources:
utility_functions_source_path = source_gen_folder / "variant" / "utility_functions.cpp"
files.append(str(utility_functions_source_path.as_posix()))
return files
def print_file_list(api_filepath, output_dir, headers=False, sources=False):
print(*get_file_list(api_filepath, output_dir, headers, sources), sep=";", end=None)
def scons_emit_files(target, source, env):
files = [env.File(f) for f in get_file_list(str(source[0]), target[0].abspath, True, True)]
env.Clean(target, files)
env["godot_cpp_gen_dir"] = target[0].abspath
return files, source
def scons_generate_bindings(target, source, env):
generate_bindings(
str(source[0]),
env["generate_template_get_node"],
"32" if "32" in env["arch"] else "64",
env["precision"],
env["godot_cpp_gen_dir"],
)
return None
def generate_bindings(api_filepath, use_template_get_node, bits="64", precision="single", output_dir="."):
api = None
target_dir = Path(output_dir) / "gen"
with open(api_filepath, encoding="utf-8") as api_file:
api = json.load(api_file)
shutil.rmtree(target_dir, ignore_errors=True)
target_dir.mkdir(parents=True)
real_t = "double" if precision == "double" else "float"
print("Built-in type config: " + real_t + "_" + bits)
generate_global_constants(api, target_dir)
generate_version_header(api, target_dir)
generate_global_constant_binds(api, target_dir)
generate_builtin_bindings(api, target_dir, real_t + "_" + bits)
generate_engine_classes_bindings(api, target_dir, use_template_get_node)
generate_utility_functions(api, target_dir)
CLASS_ALIASES = {
"ClassDB": "ClassDBSingleton",
}
builtin_classes = []
# Key is class name, value is boolean where True means the class is refcounted.
engine_classes = {}
# Type names of native structures
native_structures = []
singletons = []
def generate_builtin_bindings(api, output_dir, build_config):
global builtin_classes
core_gen_folder = Path(output_dir) / "include" / "godot_cpp" / "core"
include_gen_folder = Path(output_dir) / "include" / "godot_cpp" / "variant"
source_gen_folder = Path(output_dir) / "src" / "variant"
core_gen_folder.mkdir(parents=True, exist_ok=True)
include_gen_folder.mkdir(parents=True, exist_ok=True)
source_gen_folder.mkdir(parents=True, exist_ok=True)
generate_wrappers(core_gen_folder / "ext_wrappers.gen.inc")
generate_virtuals(core_gen_folder / "gdvirtual.gen.inc")
# Store types beforehand.
for builtin_api in api["builtin_classes"]:
if is_pod_type(builtin_api["name"]):
continue
builtin_classes.append(builtin_api["name"])
builtin_sizes = {}
for size_list in api["builtin_class_sizes"]:
if size_list["build_configuration"] == build_config:
for size in size_list["sizes"]:
builtin_sizes[size["name"]] = size["size"]
break
# Create a file for Variant size, since that class isn't generated.
variant_size_filename = include_gen_folder / "variant_size.hpp"
with variant_size_filename.open("+w", encoding="utf-8") as variant_size_file:
variant_size_source = []
add_header("variant_size.hpp", variant_size_source)
header_guard = "GODOT_CPP_VARIANT_SIZE_HPP"
variant_size_source.append(f"#ifndef {header_guard}")
variant_size_source.append(f"#define {header_guard}")
variant_size_source.append(f'#define GODOT_CPP_VARIANT_SIZE {builtin_sizes["Variant"]}')
variant_size_source.append(f"#endif // ! {header_guard}")
variant_size_file.write("\n".join(variant_size_source))
for builtin_api in api["builtin_classes"]:
if is_pod_type(builtin_api["name"]):
continue
if is_included_type(builtin_api["name"]):
continue
size = builtin_sizes[builtin_api["name"]]
header_filename = include_gen_folder / (camel_to_snake(builtin_api["name"]) + ".hpp")
source_filename = source_gen_folder / (camel_to_snake(builtin_api["name"]) + ".cpp")
# Check used classes for header include
used_classes = set()
fully_used_classes = set()
class_name = builtin_api["name"]
if "constructors" in builtin_api:
for constructor in builtin_api["constructors"]:
if "arguments" in constructor:
for argument in constructor["arguments"]:
if is_included(argument["type"], class_name):
if "default_value" in argument and argument["type"] != "Variant":
fully_used_classes.add(argument["type"])
else:
used_classes.add(argument["type"])
if "methods" in builtin_api:
for method in builtin_api["methods"]:
if "arguments" in method:
for argument in method["arguments"]:
if is_included(argument["type"], class_name):
if "default_value" in argument and argument["type"] != "Variant":
fully_used_classes.add(argument["type"])
else:
used_classes.add(argument["type"])
if "return_type" in method:
if is_included(method["return_type"], class_name):
used_classes.add(method["return_type"])
if "members" in builtin_api:
for member in builtin_api["members"]:
if is_included(member["type"], class_name):
used_classes.add(member["type"])
if "indexing_return_type" in builtin_api:
if is_included(builtin_api["indexing_return_type"], class_name):
used_classes.add(builtin_api["indexing_return_type"])
if "operators" in builtin_api:
for operator in builtin_api["operators"]:
if "right_type" in operator:
if is_included(operator["right_type"], class_name):
used_classes.add(operator["right_type"])
for type_name in fully_used_classes:
if type_name in used_classes:
used_classes.remove(type_name)
used_classes = list(used_classes)
used_classes.sort()
fully_used_classes = list(fully_used_classes)
fully_used_classes.sort()
with header_filename.open("w+", encoding="utf-8") as header_file:
header_file.write(generate_builtin_class_header(builtin_api, size, used_classes, fully_used_classes))
with source_filename.open("w+", encoding="utf-8") as source_file:
source_file.write(generate_builtin_class_source(builtin_api, size, used_classes, fully_used_classes))
# Create a header with all builtin types for convenience.
builtin_header_filename = include_gen_folder / "builtin_types.hpp"
with builtin_header_filename.open("w+", encoding="utf-8") as builtin_header_file:
builtin_header = []
add_header("builtin_types.hpp", builtin_header)
builtin_header.append("#ifndef GODOT_CPP_BUILTIN_TYPES_HPP")
builtin_header.append("#define GODOT_CPP_BUILTIN_TYPES_HPP")
builtin_header.append("")
for builtin in builtin_classes:
builtin_header.append(f"#include <godot_cpp/variant/{camel_to_snake(builtin)}.hpp>")
builtin_header.append("")
builtin_header.append("#endif // ! GODOT_CPP_BUILTIN_TYPES_HPP")
builtin_header_file.write("\n".join(builtin_header))
# Create a header with bindings for builtin types.
builtin_binds_filename = include_gen_folder / "builtin_binds.hpp"
with builtin_binds_filename.open("w+", encoding="utf-8") as builtin_binds_file:
builtin_binds = []
add_header("builtin_binds.hpp", builtin_binds)
builtin_binds.append("#ifndef GODOT_CPP_BUILTIN_BINDS_HPP")
builtin_binds.append("#define GODOT_CPP_BUILTIN_BINDS_HPP")
builtin_binds.append("")
builtin_binds.append("#include <godot_cpp/variant/builtin_types.hpp>")
builtin_binds.append("")
for builtin_api in api["builtin_classes"]:
if is_included_type(builtin_api["name"]):
if "enums" in builtin_api:
for enum_api in builtin_api["enums"]:
builtin_binds.append(f"VARIANT_ENUM_CAST({builtin_api['name']}::{enum_api['name']});")
builtin_binds.append("")
builtin_binds.append("#endif // ! GODOT_CPP_BUILTIN_BINDS_HPP")
builtin_binds_file.write("\n".join(builtin_binds))
# Create a header to implement all builtin class vararg methods and be included in "variant.hpp".
builtin_vararg_methods_header = include_gen_folder / "builtin_vararg_methods.hpp"
builtin_vararg_methods_header.open("w+").write(
generate_builtin_class_vararg_method_implements_header(api["builtin_classes"])
)
def generate_builtin_class_vararg_method_implements_header(builtin_classes):
result = []
add_header("builtin_vararg_methods.hpp", result)
header_guard = "GODOT_CPP_BUILTIN_VARARG_METHODS_HPP"
result.append(f"#ifndef {header_guard}")
result.append(f"#define {header_guard}")
result.append("")
for builtin_api in builtin_classes:
if not "methods" in builtin_api:
continue
class_name = builtin_api["name"]
for method in builtin_api["methods"]:
if not method["is_vararg"]:
continue
result += make_varargs_template(
method, "is_static" in method and method["is_static"], class_name, False, False, True
)
result.append("")
result.append("")
result.append(f"#endif // ! {header_guard}")
return "\n".join(result)
def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_classes):
result = []
class_name = builtin_api["name"]
snake_class_name = camel_to_snake(class_name).upper()
header_guard = f"GODOT_CPP_{snake_class_name}_HPP"
add_header(f"{snake_class_name.lower()}.hpp", result)
result.append(f"#ifndef {header_guard}")
result.append(f"#define {header_guard}")
result.append("")
result.append("#include <godot_cpp/core/defs.hpp>")
result.append("")
# Special cases.
if class_name == "String":
result.append("#include <godot_cpp/variant/char_string.hpp>")
result.append("#include <godot_cpp/variant/char_utils.hpp>")
result.append("#include <godot_cpp/classes/global_constants.hpp>")
if class_name == "PackedStringArray":
result.append("#include <godot_cpp/variant/string.hpp>")
if class_name == "PackedColorArray":
result.append("#include <godot_cpp/variant/color.hpp>")
if class_name == "PackedVector2Array":
result.append("#include <godot_cpp/variant/vector2.hpp>")
if class_name == "PackedVector3Array":
result.append("#include <godot_cpp/variant/vector3.hpp>")
if class_name == "PackedVector4Array":
result.append("#include <godot_cpp/variant/vector4.hpp>")
if is_packed_array(class_name):
result.append("#include <godot_cpp/core/error_macros.hpp>")
result.append("#include <initializer_list>")
if class_name == "Array":
result.append("#include <godot_cpp/variant/array_helpers.hpp>")
if class_name == "Callable":
result.append("#include <godot_cpp/variant/callable_custom.hpp>")
for include in fully_used_classes:
if include == "TypedArray":
result.append("#include <godot_cpp/variant/typed_array.hpp>")
else:
result.append(f"#include <godot_cpp/{get_include_path(include)}>")
if len(fully_used_classes) > 0:
result.append("")
result.append("#include <gdextension_interface.h>")
result.append("")
result.append("namespace godot {")
result.append("")
for type_name in used_classes:
if is_struct_type(type_name):
result.append(f"struct {type_name};")
else:
result.append(f"class {type_name};")
if len(used_classes) > 0:
result.append("")
result.append(f"class {class_name} {{")
result.append(f"\tstatic constexpr size_t {snake_class_name}_SIZE = {size};")
result.append(f"\tuint8_t opaque[{snake_class_name}_SIZE] = {{}};")
result.append("")
result.append("\tfriend class Variant;")
if class_name == "String":
result.append("\tfriend class StringName;")
result.append("")
result.append("\tstatic struct _MethodBindings {")
result.append("\t\tGDExtensionTypeFromVariantConstructorFunc from_variant_constructor;")
if "constructors" in builtin_api:
for constructor in builtin_api["constructors"]:
result.append(f'\t\tGDExtensionPtrConstructor constructor_{constructor["index"]};')
if builtin_api["has_destructor"]:
result.append("\t\tGDExtensionPtrDestructor destructor;")
if "methods" in builtin_api:
for method in builtin_api["methods"]:
result.append(f'\t\tGDExtensionPtrBuiltInMethod method_{method["name"]};')
if "members" in builtin_api:
for member in builtin_api["members"]:
result.append(f'\t\tGDExtensionPtrSetter member_{member["name"]}_setter;')
result.append(f'\t\tGDExtensionPtrGetter member_{member["name"]}_getter;')
if "indexing_return_type" in builtin_api:
result.append("\t\tGDExtensionPtrIndexedSetter indexed_setter;")
result.append("\t\tGDExtensionPtrIndexedGetter indexed_getter;")
if "is_keyed" in builtin_api and builtin_api["is_keyed"]:
result.append("\t\tGDExtensionPtrKeyedSetter keyed_setter;")
result.append("\t\tGDExtensionPtrKeyedGetter keyed_getter;")
result.append("\t\tGDExtensionPtrKeyedChecker keyed_checker;")
if "operators" in builtin_api:
for operator in builtin_api["operators"]:
if "right_type" in operator:
result.append(
f'\t\tGDExtensionPtrOperatorEvaluator operator_{get_operator_id_name(operator["name"])}_{operator["right_type"]};'
)
else:
result.append(f'\t\tGDExtensionPtrOperatorEvaluator operator_{get_operator_id_name(operator["name"])};')
result.append("\t} _method_bindings;")
result.append("")
result.append("\tstatic void init_bindings();")
result.append("\tstatic void _init_bindings_constructors_destructor();")
result.append("")
result.append(f"\t{class_name}(const Variant *p_variant);")
result.append("")
result.append("public:")
result.append(
f"\t_FORCE_INLINE_ GDExtensionTypePtr _native_ptr() const {{ return const_cast<uint8_t (*)[{snake_class_name}_SIZE]>(&opaque); }}"
)
copy_constructor_index = -1
if "constructors" in builtin_api:
for constructor in builtin_api["constructors"]:
method_signature = f"\t{class_name}("
if "arguments" in constructor:
method_signature += make_function_parameters(
constructor["arguments"], include_default=True, for_builtin=True
)
if len(constructor["arguments"]) == 1 and constructor["arguments"][0]["type"] == class_name:
copy_constructor_index = constructor["index"]
method_signature += ");"
result.append(method_signature)
# Move constructor.
result.append(f"\t{class_name}({class_name} &&other);")
# Special cases.
if class_name == "String" or class_name == "StringName" or class_name == "NodePath":
if class_name == "StringName":
result.append(f"\t{class_name}(const char *from, bool p_static = false);")
else:
result.append(f"\t{class_name}(const char *from);")
result.append(f"\t{class_name}(const wchar_t *from);")
result.append(f"\t{class_name}(const char16_t *from);")
result.append(f"\t{class_name}(const char32_t *from);")
if class_name == "Callable":
result.append("\tCallable(CallableCustom *p_custom);")
result.append("\tCallableCustom *get_custom() const;")
if "constants" in builtin_api:
axis_constants_count = 0
for constant in builtin_api["constants"]:
# Special case: Vector3.Axis is the only enum in the bindings.
# It's technically not supported by Variant but works for direct access.
if class_name == "Vector3" and constant["name"].startswith("AXIS"):
if axis_constants_count == 0:
result.append("\tenum Axis {")
result.append(f'\t\t{constant["name"]} = {constant["value"]},')
axis_constants_count += 1
if axis_constants_count == 3:
result.append("\t};")
else:
result.append(f'\tstatic const {correct_type(constant["type"])} {constant["name"]};')
if builtin_api["has_destructor"]:
result.append(f"\t~{class_name}();")
method_list = []
if "methods" in builtin_api:
for method in builtin_api["methods"]:
method_list.append(method["name"])
vararg = method["is_vararg"]
if vararg:
result.append("\ttemplate<typename... Args>")
method_signature = "\t"
if "is_static" in method and method["is_static"]:
method_signature += "static "
if "return_type" in method:
method_signature += f'{correct_type(method["return_type"])} '
else:
method_signature += "void "
method_signature += f'{method["name"]}('
method_arguments = []
if "arguments" in method:
method_arguments = method["arguments"]
method_signature += make_function_parameters(
method_arguments, include_default=True, for_builtin=True, is_vararg=vararg
)
method_signature += ")"
if method["is_const"]:
method_signature += " const"
method_signature += ";"
result.append(method_signature)
# Special cases.
if class_name == "String":
result.append("\tstatic String utf8(const char *from, int64_t len = -1);")
result.append("\tvoid parse_utf8(const char *from, int64_t len = -1);")
result.append("\tstatic String utf16(const char16_t *from, int64_t len = -1);")
result.append("\tvoid parse_utf16(const char16_t *from, int64_t len = -1);")
result.append("\tCharString utf8() const;")
result.append("\tCharString ascii() const;")
result.append("\tChar16String utf16() const;")
result.append("\tChar32String utf32() const;")
result.append("\tCharWideString wide_string() const;")
result.append("\tstatic String num_real(double p_num, bool p_trailing = true);")
result.append("\tError resize(int64_t p_size);")
if "members" in builtin_api:
for member in builtin_api["members"]:
if f'get_{member["name"]}' not in method_list:
result.append(f'\t{correct_type(member["type"])} get_{member["name"]}() const;')
if f'set_{member["name"]}' not in method_list:
result.append(f'\tvoid set_{member["name"]}({type_for_parameter(member["type"])}value);')
if "operators" in builtin_api:
for operator in builtin_api["operators"]:
if operator["name"] not in ["in", "xor"]:
if "right_type" in operator:
result.append(
f'\t{correct_type(operator["return_type"])} operator{operator["name"]}({type_for_parameter(operator["right_type"])}other) const;'
)
else:
result.append(
f'\t{correct_type(operator["return_type"])} operator{operator["name"].replace("unary", "")}() const;'
)
# Copy assignment.
if copy_constructor_index >= 0:
result.append(f"\t{class_name} &operator=(const {class_name} &other);")
# Move assignment.
result.append(f"\t{class_name} &operator=({class_name} &&other);")
# Special cases.
if class_name == "String":
result.append("\tString &operator=(const char *p_str);")
result.append("\tString &operator=(const wchar_t *p_str);")
result.append("\tString &operator=(const char16_t *p_str);")
result.append("\tString &operator=(const char32_t *p_str);")
result.append("\tbool operator==(const char *p_str) const;")
result.append("\tbool operator==(const wchar_t *p_str) const;")
result.append("\tbool operator==(const char16_t *p_str) const;")
result.append("\tbool operator==(const char32_t *p_str) const;")
result.append("\tbool operator!=(const char *p_str) const;")
result.append("\tbool operator!=(const wchar_t *p_str) const;")
result.append("\tbool operator!=(const char16_t *p_str) const;")
result.append("\tbool operator!=(const char32_t *p_str) const;")
result.append("\tString operator+(const char *p_str);")
result.append("\tString operator+(const wchar_t *p_str);")
result.append("\tString operator+(const char16_t *p_str);")
result.append("\tString operator+(const char32_t *p_str);")
result.append("\tString operator+(char32_t p_char);")
result.append("\tString &operator+=(const String &p_str);")
result.append("\tString &operator+=(char32_t p_char);")
result.append("\tString &operator+=(const char *p_str);")
result.append("\tString &operator+=(const wchar_t *p_str);")
result.append("\tString &operator+=(const char32_t *p_str);")
result.append("\tconst char32_t &operator[](int64_t p_index) const;")
result.append("\tchar32_t &operator[](int64_t p_index);")
result.append("\tconst char32_t *ptr() const;")
result.append("\tchar32_t *ptrw();")
if class_name == "Array":
result.append("\ttemplate <typename... Args>")
result.append("\tstatic Array make(Args... args) {")
result.append("\t\treturn helpers::append_all(Array(), args...);")
result.append("\t}")
if is_packed_array(class_name):
return_type = correct_type(builtin_api["indexing_return_type"])
if class_name == "PackedByteArray":
return_type = "uint8_t"
elif class_name == "PackedInt32Array":
return_type = "int32_t"
elif class_name == "PackedFloat32Array":
return_type = "float"
result.append(f"\tconst {return_type} &operator[](int64_t p_index) const;")
result.append(f"\t{return_type} &operator[](int64_t p_index);")
result.append(f"\tconst {return_type} *ptr() const;")
result.append(f"\t{return_type} *ptrw();")
iterators = """
struct Iterator {
_FORCE_INLINE_ $TYPE &operator*() const {
return *elem_ptr;
}
_FORCE_INLINE_ $TYPE *operator->() const { return elem_ptr; }
_FORCE_INLINE_ Iterator &operator++() {
elem_ptr++;
return *this;
}
_FORCE_INLINE_ Iterator &operator--() {
elem_ptr--;
return *this;
}
_FORCE_INLINE_ bool operator==(const Iterator &b) const { return elem_ptr == b.elem_ptr; }
_FORCE_INLINE_ bool operator!=(const Iterator &b) const { return elem_ptr != b.elem_ptr; }
Iterator($TYPE *p_ptr) { elem_ptr = p_ptr; }
Iterator() {}
Iterator(const Iterator &p_it) { elem_ptr = p_it.elem_ptr; }
private:
$TYPE *elem_ptr = nullptr;
};
struct ConstIterator {
_FORCE_INLINE_ const $TYPE &operator*() const {
return *elem_ptr;
}
_FORCE_INLINE_ const $TYPE *operator->() const { return elem_ptr; }
_FORCE_INLINE_ ConstIterator &operator++() {
elem_ptr++;
return *this;
}
_FORCE_INLINE_ ConstIterator &operator--() {
elem_ptr--;
return *this;
}
_FORCE_INLINE_ bool operator==(const ConstIterator &b) const { return elem_ptr == b.elem_ptr; }
_FORCE_INLINE_ bool operator!=(const ConstIterator &b) const { return elem_ptr != b.elem_ptr; }
ConstIterator(const $TYPE *p_ptr) { elem_ptr = p_ptr; }
ConstIterator() {}
ConstIterator(const ConstIterator &p_it) { elem_ptr = p_it.elem_ptr; }
private:
const $TYPE *elem_ptr = nullptr;
};
_FORCE_INLINE_ Iterator begin() {
return Iterator(ptrw());
}
_FORCE_INLINE_ Iterator end() {
return Iterator(ptrw() + size());
}
_FORCE_INLINE_ ConstIterator begin() const {
return ConstIterator(ptr());
}
_FORCE_INLINE_ ConstIterator end() const {
return ConstIterator(ptr() + size());
}
"""
result.append(iterators.replace("$TYPE", return_type))
init_list = """
_FORCE_INLINE_ $CLASS(std::initializer_list<$TYPE> p_init) {
ERR_FAIL_COND(resize(p_init.size()) != 0);
size_t i = 0;
for (const $TYPE &element : p_init) {
set(i++, element);
}
}
"""
result.append(init_list.replace("$TYPE", return_type).replace("$CLASS", class_name))
if class_name == "Array":
result.append("\tconst Variant &operator[](int64_t p_index) const;")
result.append("\tVariant &operator[](int64_t p_index);")
result.append("\tvoid set_typed(uint32_t p_type, const StringName &p_class_name, const Variant &p_script);")
result.append("\tvoid _ref(const Array &p_from) const;")
if class_name == "Dictionary":
result.append("\tconst Variant &operator[](const Variant &p_key) const;")
result.append("\tVariant &operator[](const Variant &p_key);")
result.append("};")
if class_name == "String":
result.append("")
result.append("bool operator==(const char *p_chr, const String &p_str);")
result.append("bool operator==(const wchar_t *p_chr, const String &p_str);")
result.append("bool operator==(const char16_t *p_chr, const String &p_str);")
result.append("bool operator==(const char32_t *p_chr, const String &p_str);")
result.append("bool operator!=(const char *p_chr, const String &p_str);")
result.append("bool operator!=(const wchar_t *p_chr, const String &p_str);")
result.append("bool operator!=(const char16_t *p_chr, const String &p_str);")
result.append("bool operator!=(const char32_t *p_chr, const String &p_str);")
result.append("String operator+(const char *p_chr, const String &p_str);")
result.append("String operator+(const wchar_t *p_chr, const String &p_str);")
result.append("String operator+(const char16_t *p_chr, const String &p_str);")
result.append("String operator+(const char32_t *p_chr, const String &p_str);")
result.append("String operator+(char32_t p_char, const String &p_str);")
result.append("String itos(int64_t p_val);")
result.append("String uitos(uint64_t p_val);")
result.append("String rtos(double p_val);")
result.append("String rtoss(double p_val);")
result.append("")
result.append("} // namespace godot")
result.append(f"#endif // ! {header_guard}")
return "\n".join(result)
def generate_builtin_class_source(builtin_api, size, used_classes, fully_used_classes):
result = []
class_name = builtin_api["name"]
snake_class_name = camel_to_snake(class_name)
enum_type_name = f"GDEXTENSION_VARIANT_TYPE_{snake_class_name.upper()}"
add_header(f"{snake_class_name}.cpp", result)
result.append("")
result.append(f"#include <godot_cpp/variant/{snake_class_name}.hpp>")
result.append("")
result.append("#include <godot_cpp/core/binder_common.hpp>")
result.append("")
result.append("#include <godot_cpp/godot.hpp>")
result.append("")
# Only used since the "fully used" is included in header already.
for include in used_classes:
result.append(f"#include <godot_cpp/{get_include_path(include)}>")
if len(used_classes) > 0:
result.append("")
result.append("#include <godot_cpp/core/builtin_ptrcall.hpp>")
result.append("")
result.append("#include <utility>")
result.append("")
result.append("namespace godot {")
result.append("")
result.append(f"{class_name}::_MethodBindings {class_name}::_method_bindings;")
result.append("")
result.append(f"void {class_name}::_init_bindings_constructors_destructor() {{")
result.append(
f"\t_method_bindings.from_variant_constructor = internal::gdextension_interface_get_variant_to_type_constructor({enum_type_name});"
)
if "constructors" in builtin_api:
for constructor in builtin_api["constructors"]:
result.append(
f'\t_method_bindings.constructor_{constructor["index"]} = internal::gdextension_interface_variant_get_ptr_constructor({enum_type_name}, {constructor["index"]});'
)
if builtin_api["has_destructor"]:
result.append(
f"\t_method_bindings.destructor = internal::gdextension_interface_variant_get_ptr_destructor({enum_type_name});"
)
result.append("}")
result.append(f"void {class_name}::init_bindings() {{")
# StringName's constructor internally uses String, so it constructor must be ready !
if class_name == "StringName":
result.append("\tString::_init_bindings_constructors_destructor();")
result.append(f"\t{class_name}::_init_bindings_constructors_destructor();")
result.append("\tStringName _gde_name;")