# Copyright 2017 The Chromium Authors # Use of this source code is governed by a BSD-style license that can be # found in the LICENSE file. """Generates C source files from an idl (mojom) Module.""" import os # This is called from cronet_bindings_generator.py which does some magic to add # libraries to the lookup path which pylint does not # pylint: disable=import-error import mojom.generate.generator as generator import mojom.generate.module as mojom import mojom.generate.pack as pack from mojom.generate.template_expander import UseJinja # pylint: enable=import-error # pylint: disable=useless-object-inheritance,super-with-arguments _kind_to_cpp_type = { mojom.BOOL: "bool", mojom.INT8: "int8_t", mojom.UINT8: "uint8_t", mojom.INT16: "int16_t", mojom.UINT16: "uint16_t", mojom.INT32: "int32_t", mojom.UINT32: "uint32_t", mojom.FLOAT: "float", mojom.INT64: "int64_t", mojom.UINT64: "uint64_t", mojom.DOUBLE: "double", } _kind_to_cpp_literal_suffix = { mojom.UINT8: "U", mojom.UINT16: "U", mojom.UINT32: "U", mojom.FLOAT: "f", mojom.UINT64: "ULL", } ATTRIBUTE_ABSTRACT = "Abstract" class _NameFormatter(object): """A formatter for the names of kinds or values.""" def __init__(self, token, variant): self._token = token self._variant = variant def Format(self, separator, internal=False, include_variant=False, omit_namespace_for_module=None, flatten_nested_kind=False): """Formats the name according to the given configuration. Args: separator: Separator between different parts of the name. prefixed: Whether a leading separator should be added. internal: Returns the name in the "internal" namespace. include_variant: Whether to include variant as namespace. If |internal| is True, then this flag is ignored and variant is not included. omit_namespace_for_module: If the token is from the specified module, don't add the namespaces of the module to the name. flatten_nested_kind: It is allowed to define enums inside structs and interfaces. If this flag is set to True, this method concatenates the parent kind and the nested kind with '_', instead of treating the parent kind as a scope.""" parts = [] if self._ShouldIncludeNamespace(omit_namespace_for_module): parts.extend(self._GetNamespace()) if include_variant and self._variant and not internal: parts.append(self._variant) parts.extend(self._GetName(internal, flatten_nested_kind)) return separator.join(parts) def FormatForCpp(self, omit_namespace_for_module=None, internal=False, flatten_nested_kind=False): return self.Format("_", omit_namespace_for_module=omit_namespace_for_module, internal=internal, include_variant=True, flatten_nested_kind=flatten_nested_kind) def FormatForMojom(self): return self.Format(".") def _MapKindName(self, token, internal): if not internal: return token.name if (mojom.IsStructKind(token) or mojom.IsUnionKind(token) or mojom.IsEnumKind(token)): return token.name + "_Data" return token.name def _GetName(self, internal, flatten_nested_kind): if isinstance(self._token, mojom.EnumValue): name_parts = _NameFormatter(self._token.enum, self._variant)._GetName( internal, flatten_nested_kind) name_parts.append(self._token.name) return name_parts name_parts = [] if internal: name_parts.append("internal") if (flatten_nested_kind and mojom.IsEnumKind(self._token) and self._token.parent_kind): name = "%s_%s" % (self._token.parent_kind.name, self._MapKindName(self._token, internal)) name_parts.append(name) return name_parts if self._token.parent_kind: name_parts.append( self._MapKindName(self._token.parent_kind, internal)) name_parts.append(self._MapKindName(self._token, internal)) return name_parts def _ShouldIncludeNamespace(self, _): return self._token.module # pylint: disable=inconsistent-return-statements def _GetNamespace(self): if self._token.module: return NamespaceToArray(self._token.module.namespace) # pylint: enable=inconsistent-return-statements def NamespaceToArray(namespace): return namespace.split(".") if namespace else [] def IsNativeOnlyKind(kind): return (mojom.IsStructKind(kind) or mojom.IsEnumKind(kind)) and \ kind.native_only def UseCustomSerializer(kind): return mojom.IsStructKind(kind) and kind.custom_serializer def AllEnumValues(enum): """Return all enum values associated with an enum. Args: enum: {mojom.Enum} The enum type. Returns: {Set[int]} The values. """ return set(field.numeric_value for field in enum.fields) def GetCppPodType(kind): return _kind_to_cpp_type[kind] def RequiresContextForDataView(kind): for field in kind.fields: if mojom.IsReferenceKind(field.kind): return True return False def ShouldInlineStruct(struct): # TODO(darin): Base this on the size of the wrapper class. if len(struct.fields) > 4: return False for field in struct.fields: if mojom.IsReferenceKind( field.kind) and not mojom.IsStringKind(field.kind): return False return True def ShouldInlineUnion(union): return not any( mojom.IsReferenceKind(field.kind) and not mojom.IsStringKind(field.kind) for field in union.fields) def IsAbstract(kind): return kind.attributes.get(ATTRIBUTE_ABSTRACT, False) \ if kind.attributes else False class StructConstructor(object): """Represents a constructor for a generated struct. Fields: fields: {[Field]} All struct fields in order. params: {[Field]} The fields that are passed as params. """ def __init__(self, fields, params): self._fields = fields self._params = set(params) @property def params(self): return [field for field in self._fields if field in self._params] @property def fields(self): for field in self._fields: yield (field, field in self._params) class Generator(generator.Generator): def _GetExtraTraitsHeaders(self): extra_headers = set() for typemap in self._GetAllUsedTypemaps(): extra_headers.update(typemap.get("traits_headers", [])) return sorted(extra_headers) def _GetAllUsedTypemaps(self): """Returns the typemaps for types needed for serialization in this module. A type is needed for serialization if it is contained by a struct or union defined in this module, is a parameter of a message in an interface in this module or is contained within another type needed for serialization. """ used_typemaps = [] seen_types = set() def IsBasicKind(kind): return (mojom.IsIntegralKind(kind) or mojom.IsStringKind(kind) or mojom.IsDoubleKind(kind) or mojom.IsFloatKind(kind) or mojom.IsAnyHandleKind(kind) or mojom.IsInterfaceKind(kind) or mojom.IsInterfaceRequestKind(kind) or mojom.IsAssociatedKind(kind)) def AddKind(kind): if IsBasicKind(kind): pass elif mojom.IsArrayKind(kind): AddKind(kind.kind) elif mojom.IsMapKind(kind): AddKind(kind.key_kind) AddKind(kind.value_kind) else: name = self._GetFullMojomNameForKind(kind) if name in seen_types: return seen_types.add(name) typemap = self.typemap.get(name, None) if typemap: used_typemaps.append(typemap) if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind): for field in kind.fields: AddKind(field.kind) for kind in self.module.structs + self.module.unions: for field in kind.fields: AddKind(field.kind) for interface in self.module.interfaces: for method in interface.methods: for parameter in method.parameters + ( method.response_parameters or []): AddKind(parameter.kind) return used_typemaps def _GetExtraPublicHeaders(self): all_enums = list(self.module.enums) for struct in self.module.structs: all_enums.extend(struct.enums) for interface in self.module.interfaces: all_enums.extend(interface.enums) types = set( self._GetFullMojomNameForKind(typename) for typename in self.module.structs + all_enums + self.module.unions) headers = set() for typename, typemap in self.typemap.items(): if typename in types: headers.update(typemap.get("public_headers", [])) return sorted(headers) def _GetDirectlyUsedKinds(self): for struct in self.module.structs + self.module.unions: for field in struct.fields: yield field.kind for interface in self.module.interfaces: for method in interface.methods: for param in method.parameters + (method.response_parameters or []): yield param.kind def _GetJinjaExports(self): all_enums = list(self.module.enums) for struct in self.module.structs: all_enums.extend(struct.enums) for interface in self.module.interfaces: all_enums.extend(interface.enums) return { "all_enums": all_enums, "enums": self.module.enums, "export_attribute": self.export_attribute, "export_header": self.export_header, "extra_public_headers": self._GetExtraPublicHeaders(), "extra_traits_headers": self._GetExtraTraitsHeaders(), "for_blink": self.for_blink, "imports": self.module.imports, "interfaces": self.module.interfaces, "kinds": self.module.kinds, "module": self.module, "namespace": self.module.namespace, "namespaces_as_array": NamespaceToArray(self.module.namespace), "structs": self.module.structs, "unions": self.module.unions, "variant": self.variant, } @staticmethod def GetTemplatePrefix(): return "c_templates" def GetFilters(self): cpp_filters = { "all_enum_values": AllEnumValues, "c_wrapper_type": self._GetCWrapperType, "constant_value": self._ConstantValue, "contains_handles_or_interfaces": mojom.ContainsHandlesOrInterfaces, "contains_move_only_members": self._ContainsMoveOnlyMembers, "cpp_wrapper_param_type": self._GetCppWrapperParamType, "cpp_data_view_type": self._GetCppDataViewType, "cpp_field_type": self._GetCppFieldType, "cpp_union_field_type": self._GetCppUnionFieldType, "cpp_pod_type": GetCppPodType, "cpp_union_getter_return_type": self._GetUnionGetterReturnType, "cpp_union_trait_getter_return_type": self._GetUnionTraitGetterReturnType, "cpp_wrapper_type": self._GetCppWrapperType, "default_value": self._DefaultValue, "expression_to_text": self._ExpressionToText, "format_constant_declaration": self._FormatConstantDeclaration, "get_container_validate_params_ctor_args": self._GetContainerValidateParamsCtorArgs, "get_name_for_kind": self._GetNameForKind, "get_pad": pack.GetPad, "get_qualified_name_for_kind": self._GetQualifiedNameForKind, "has_callbacks": mojom.HasCallbacks, "has_sync_methods": mojom.HasSyncMethods, "requires_context_for_data_view": RequiresContextForDataView, "should_inline": ShouldInlineStruct, "should_inline_union": ShouldInlineUnion, "is_abstract": IsAbstract, "is_array_kind": mojom.IsArrayKind, "is_enum_kind": mojom.IsEnumKind, "is_integral_kind": mojom.IsIntegralKind, "is_native_only_kind": IsNativeOnlyKind, "is_any_handle_kind": mojom.IsAnyHandleKind, "is_any_interface_kind": mojom.IsAnyInterfaceKind, "is_any_handle_or_interface_kind": mojom.IsAnyHandleOrInterfaceKind, "is_associated_kind": mojom.IsAssociatedKind, "is_hashable": self._IsHashableKind, "is_map_kind": mojom.IsMapKind, "is_nullable_kind": mojom.IsNullableKind, "is_object_kind": mojom.IsObjectKind, "is_reference_kind": mojom.IsReferenceKind, "is_string_kind": mojom.IsStringKind, "is_struct_kind": mojom.IsStructKind, "is_typemapped_kind": self._IsTypemappedKind, "is_union_kind": mojom.IsUnionKind, "passes_associated_kinds": mojom.PassesAssociatedKinds, "struct_constructors": self._GetStructConstructors, "under_to_camel": generator.ToCamel, "unmapped_type_for_serializer": self._GetUnmappedTypeForSerializer, } return cpp_filters @UseJinja("module_c.h.tmpl") def _GenerateModuleHeader(self): return self._GetJinjaExports() @UseJinja("module_impl_interface.h.tmpl") def _GenerateModuleInterfaceHeader(self): return self._GetJinjaExports() @UseJinja("module_impl_interface.cc.tmpl") def _GenerateModuleInterfaceSource(self): return self._GetJinjaExports() @UseJinja("module_impl_interface_unittest.cc.tmpl") def _GenerateModuleInterfaceUnittest(self): return self._GetJinjaExports() @UseJinja("module_impl_struct.h.tmpl") def _GenerateModuleStructHeader(self): return self._GetJinjaExports() @UseJinja("module_impl_struct.cc.tmpl") def _GenerateModuleStructSource(self): return self._GetJinjaExports() @UseJinja("module_impl_struct_unittest.cc.tmpl") def _GenerateModuleStructUnittest(self): return self._GetJinjaExports() @UseJinja("module.cc.tmpl") def _GenerateModuleSource(self): return self._GetJinjaExports() @UseJinja("module-shared.h.tmpl") def _GenerateModuleSharedHeader(self): return self._GetJinjaExports() @UseJinja("module-shared-internal.h.tmpl") def _GenerateModuleSharedInternalHeader(self): return self._GetJinjaExports() @UseJinja("module-shared.cc.tmpl") def _GenerateModuleSharedSource(self): return self._GetJinjaExports() def GenerateFiles(self, _): self.module.Stylize(generator.Stylizer()) # TODO(mef): Remove this when generated files are not checked in. path, module = os.path.split(self.module.path) self.module.path = os.path.join(path, "generated", module) if self.generate_non_variant_code: self.Write(self._GenerateModuleSharedHeader(), "%s-shared.h" % self.module.path) self.Write(self._GenerateModuleSharedInternalHeader(), "%s-shared-internal.h" % self.module.path) self.Write(self._GenerateModuleSharedSource(), "%s-shared.cc" % self.module.path) else: suffix = "-%s" % self.variant if self.variant else "" self.Write(self._GenerateModuleHeader(), "%s%s_c.h" % (self.module.path, suffix)) self.Write(self._GenerateModuleInterfaceHeader(), "%s%s_impl_interface.h" % (self.module.path, suffix)) self.Write(self._GenerateModuleInterfaceSource(), "%s%s_impl_interface.cc" % (self.module.path, suffix)) self.Write( self._GenerateModuleInterfaceUnittest(), "%s%s_impl_interface_unittest.cc" % (self.module.path, suffix)) self.Write(self._GenerateModuleStructHeader(), "%s%s_impl_struct.h" % (self.module.path, suffix)) self.Write(self._GenerateModuleStructSource(), "%s%s_impl_struct.cc" % (self.module.path, suffix)) self.Write( self._GenerateModuleStructUnittest(), "%s%s_impl_struct_unittest.cc" % (self.module.path, suffix)) def _ConstantValue(self, constant): return self._ExpressionToText(constant.value, kind=constant.kind) def _DefaultValue(self, field): if not field.default: return "" if mojom.IsStructKind(field.kind): assert field.default == "default" if self._IsTypemappedKind(field.kind): return "" return "%s::New()" % self._GetNameForKind(field.kind) expression = self._ExpressionToText(field.default, kind=field.kind) if mojom.IsEnumKind(field.kind) and self._IsTypemappedKind(field.kind): expression = "mojo::internal::ConvertEnumValue<%s, %s>(%s)" % ( self._GetNameForKind(field.kind), self._GetCppWrapperType(field.kind), expression) return expression def _GetNameForKind(self, kind, internal=False, flatten_nested_kind=False, add_same_module_namespaces=False): return _NameFormatter(kind, self.variant).FormatForCpp( internal=internal, flatten_nested_kind=flatten_nested_kind, omit_namespace_for_module=(None if add_same_module_namespaces else self.module)) def _GetQualifiedNameForKind(self, kind, internal=False, flatten_nested_kind=False, include_variant=True): return _NameFormatter( kind, self.variant if include_variant else None).FormatForCpp( internal=internal, flatten_nested_kind=flatten_nested_kind) def _GetFullMojomNameForKind(self, kind): return _NameFormatter(kind, self.variant).FormatForMojom() def _IsTypemappedKind(self, kind): return hasattr(kind, "name") and \ self._GetFullMojomNameForKind(kind) in self.typemap def _IsHashableKind(self, kind): """Check if the kind can be hashed. Args: kind: {Kind} The kind to check. Returns: {bool} True if a value of this kind can be hashed. """ checked = set() def Check(kind): if kind.spec in checked: return True checked.add(kind.spec) if mojom.IsNullableKind(kind): return False if mojom.IsStructKind(kind): if kind.native_only: return False if (self._IsTypemappedKind(kind) and not self.typemap[ self._GetFullMojomNameForKind(kind)]["hashable"]): return False return all(Check(field.kind) for field in kind.fields) if mojom.IsEnumKind(kind): return not self._IsTypemappedKind(kind) or self.typemap[ self._GetFullMojomNameForKind(kind)]["hashable"] if mojom.IsUnionKind(kind): return all(Check(field.kind) for field in kind.fields) if mojom.IsAnyHandleKind(kind): return False if mojom.IsAnyInterfaceKind(kind): return False # TODO(crbug.com/41326458): Arrays and maps could be made hashable. We just # don't have a use case yet. if mojom.IsArrayKind(kind): return False if mojom.IsMapKind(kind): return False return True return Check(kind) def _GetNativeTypeName(self, typemapped_kind): return self.typemap[self._GetFullMojomNameForKind( typemapped_kind)]["typename"] def _FormatConstantDeclaration(self, constant, nested=False): if mojom.IsStringKind(constant.kind): if nested: return "const char %s[]" % constant.name return "%sextern const char %s[]" % \ ((self.export_attribute + " ") if self.export_attribute else "", constant.name) return "const %s %s_%s = %s" % (GetCppPodType( constant.kind), self.module.namespace, constant.name, self._ConstantValue(constant)) def _GetCppWrapperType(self, kind, add_same_module_namespaces=False): def _AddOptional(type_name): return "std::optional<%s>" % type_name if self._IsTypemappedKind(kind): type_name = self._GetNativeTypeName(kind) if (mojom.IsNullableKind(kind) and not self.typemap[self._GetFullMojomNameForKind( kind)]["nullable_is_same_type"]): type_name = _AddOptional(type_name) return type_name if mojom.IsEnumKind(kind): return self._GetNameForKind( kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind): return "%s" % self._GetNameForKind( kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsArrayKind(kind): pattern = "blink::Vector<%s>" if self.for_blink else "std::vector<%s>" if mojom.IsNullableKind(kind): pattern = _AddOptional(pattern) return pattern % self._GetCppWrapperType( kind.kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsMapKind(kind): pattern = ("blink::HashMap<%s, %s>" if self.for_blink else "std::unordered_map<%s, %s>") if mojom.IsNullableKind(kind): pattern = _AddOptional(pattern) return pattern % ( self._GetCppWrapperType( kind.key_kind, add_same_module_namespaces=add_same_module_namespaces), self._GetCppWrapperType( kind.value_kind, add_same_module_namespaces=add_same_module_namespaces)) if mojom.IsInterfaceKind(kind): return "%sPtr" % self._GetNameForKind( kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsInterfaceRequestKind(kind): return "%sRequest" % self._GetNameForKind( kind.kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsAssociatedInterfaceKind(kind): return "%sAssociatedPtrInfo" % self._GetNameForKind( kind.kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsAssociatedInterfaceRequestKind(kind): return "%sAssociatedRequest" % self._GetNameForKind( kind.kind, add_same_module_namespaces=add_same_module_namespaces) if mojom.IsStringKind(kind): if self.for_blink: return "blink::String" type_name = "std::string" return (_AddOptional(type_name) if mojom.IsNullableKind(kind) else type_name) if mojom.IsGenericHandleKind(kind): return "Cronet_RawDataPtr" if mojom.IsDataPipeConsumerKind(kind): return "mojo::ScopedDataPipeConsumerHandle" if mojom.IsDataPipeProducerKind(kind): return "mojo::ScopedDataPipeProducerHandle" if mojom.IsMessagePipeKind(kind): return "mojo::ScopedMessagePipeHandle" if mojom.IsSharedBufferKind(kind): return "mojo::ScopedSharedBufferHandle" if not kind in _kind_to_cpp_type: raise Exception("Unrecognized kind %s" % kind.spec) return _kind_to_cpp_type[kind] def _IsMoveOnlyKind(self, kind): if self._IsTypemappedKind(kind): if mojom.IsEnumKind(kind): return False return self.typemap[self._GetFullMojomNameForKind( kind)]["move_only"] if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind): return True if mojom.IsArrayKind(kind): return self._IsMoveOnlyKind(kind.kind) if mojom.IsMapKind(kind): return (self._IsMoveOnlyKind(kind.value_kind) or self._IsMoveOnlyKind(kind.key_kind)) if mojom.IsAnyHandleOrInterfaceKind(kind): return True return False def _IsCopyablePassByValue(self, kind): if not self._IsTypemappedKind(kind): return False return self.typemap[self._GetFullMojomNameForKind( kind)]["copyable_pass_by_value"] def _ShouldPassParamByValue(self, kind): return ((not mojom.IsReferenceKind(kind)) or self._IsMoveOnlyKind(kind) or self._IsCopyablePassByValue(kind)) def _GetCWrapperType(self, kind): if mojom.IsStringKind(kind): return "Cronet_String" if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind): return "%sPtr" % self._GetNameForKind(kind) return self._GetCppWrapperType(kind) def _GetCppWrapperParamType(self, kind): cpp_wrapper_type = self._GetCppWrapperType(kind) return (cpp_wrapper_type if self._ShouldPassParamByValue(kind) else "const %s&" % cpp_wrapper_type) def _GetCppFieldType(self, kind): if mojom.IsStructKind(kind): return ("mojo::internal::Pointer<%s>" % self._GetNameForKind(kind, internal=True)) if mojom.IsUnionKind(kind): return "%s" % self._GetNameForKind(kind, internal=True) if mojom.IsArrayKind(kind): return ("mojo::internal::Pointer>" % self._GetCppFieldType(kind.kind)) if mojom.IsMapKind(kind): return ( "mojo::internal::Pointer>" % (self._GetCppFieldType( kind.key_kind), self._GetCppFieldType(kind.value_kind))) if mojom.IsInterfaceKind(kind): return "mojo::internal::Interface_Data" if mojom.IsInterfaceRequestKind(kind): return "mojo::internal::Handle_Data" if mojom.IsAssociatedInterfaceKind(kind): return "mojo::internal::AssociatedInterface_Data" if mojom.IsAssociatedInterfaceRequestKind(kind): return "mojo::internal::AssociatedEndpointHandle_Data" if mojom.IsEnumKind(kind): return "int32_t" if mojom.IsStringKind(kind): return "mojo::internal::Pointer" if mojom.IsAnyHandleKind(kind): return "mojo::internal::Handle_Data" return _kind_to_cpp_type[kind] def _GetCppUnionFieldType(self, kind): if mojom.IsUnionKind(kind): return ("mojo::internal::Pointer<%s>" % self._GetNameForKind(kind, internal=True)) return self._GetCppFieldType(kind) def _GetUnionGetterReturnType(self, kind): if mojom.IsReferenceKind(kind): return "%s&" % self._GetCppWrapperType(kind) return self._GetCppWrapperType(kind) def _GetUnionTraitGetterReturnType(self, kind): """Get field type used in UnionTraits template specialization. The type may be qualified as UnionTraits specializations live outside the namespace where e.g. structs are defined. Args: kind: {Kind} The type of the field. Returns: {str} The C++ type to use for the field. """ if mojom.IsReferenceKind(kind): return "%s&" % self._GetCppWrapperType( kind, add_same_module_namespaces=True) return self._GetCppWrapperType(kind, add_same_module_namespaces=True) def _TranslateConstants(self, token, kind): if isinstance(token, mojom.NamedValue): return self._GetNameForKind(token, flatten_nested_kind=True) if isinstance(token, mojom.BuiltinValue): if token.value == "double.INFINITY": return "std::numeric_limits::infinity()" if token.value == "float.INFINITY": return "std::numeric_limits::infinity()" if token.value == "double.NEGATIVE_INFINITY": return "-std::numeric_limits::infinity()" if token.value == "float.NEGATIVE_INFINITY": return "-std::numeric_limits::infinity()" if token.value == "double.NAN": return "std::numeric_limits::quiet_NaN()" if token.value == "float.NAN": return "std::numeric_limits::quiet_NaN()" if (kind is not None and mojom.IsFloatKind(kind)): return token if token.isdigit() else token + "f" return "%s%s" % (token, _kind_to_cpp_literal_suffix.get(kind, "")) def _ExpressionToText(self, value, kind=None): return self._TranslateConstants(value, kind) def _ContainsMoveOnlyMembers(self, struct): for field in struct.fields: if self._IsMoveOnlyKind(field.kind): return True return False def _GetStructConstructors(self, struct): """Returns a list of constructors for a struct. Params: struct: {Struct} The struct to return constructors for. Returns: {[StructConstructor]} A list of StructConstructors that should be generated for |struct|. """ if not mojom.IsStructKind(struct): raise TypeError # Types that are neither copyable nor movable can't be passed to a struct # constructor so only generate a default constructor. if any( self._IsTypemappedKind(field.kind) and self.typemap[self._GetFullMojomNameForKind( field.kind)]["non_copyable_non_movable"] for field in struct.fields): return [StructConstructor(struct.fields, [])] param_counts = [0] for version in struct.versions: if param_counts[-1] != version.num_fields: param_counts.append(version.num_fields) ordinal_fields = sorted(struct.fields, key=lambda field: field.ordinal) return (StructConstructor(struct.fields, ordinal_fields[:param_count]) for param_count in param_counts) def _GetContainerValidateParamsCtorArgs(self, kind): if mojom.IsStringKind(kind): expected_num_elements = 0 element_is_nullable = False key_validate_params = "nullptr" element_validate_params = "nullptr" enum_validate_func = "nullptr" elif mojom.IsMapKind(kind): expected_num_elements = 0 element_is_nullable = False key_validate_params = self._GetNewContainerValidateParams( mojom.Array(kind=kind.key_kind)) element_validate_params = self._GetNewContainerValidateParams( mojom.Array(kind=kind.value_kind)) enum_validate_func = "nullptr" else: # mojom.IsArrayKind(kind) expected_num_elements = generator.ExpectedArraySize(kind) or 0 element_is_nullable = mojom.IsNullableKind(kind.kind) key_validate_params = "nullptr" element_validate_params = self._GetNewContainerValidateParams( kind.kind) if mojom.IsEnumKind(kind.kind): enum_validate_func = ( "%s::Validate" % self._GetQualifiedNameForKind( kind.kind, internal=True, flatten_nested_kind=True)) else: enum_validate_func = "nullptr" if enum_validate_func == "nullptr": if key_validate_params == "nullptr": return "%d, %s, %s" % (expected_num_elements, "true" if element_is_nullable else "false", element_validate_params) return "%s, %s" % (key_validate_params, element_validate_params) return "%d, %s" % (expected_num_elements, enum_validate_func) def _GetNewContainerValidateParams(self, kind): if (not mojom.IsArrayKind(kind) and not mojom.IsMapKind(kind) and not mojom.IsStringKind(kind)): return "nullptr" return "new mojo::internal::ContainerValidateParams(%s)" % ( self._GetContainerValidateParamsCtorArgs(kind)) def _GetCppDataViewType(self, kind, qualified=False): def _GetName(input_kind): return _NameFormatter(input_kind, None).FormatForCpp( omit_namespace_for_module=(None if qualified else self.module), flatten_nested_kind=True) if mojom.IsEnumKind(kind): return _GetName(kind) if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind): return "%sDataView" % _GetName(kind) if mojom.IsArrayKind(kind): return "mojo::ArrayDataView<%s>" % (self._GetCppDataViewType( kind.kind, qualified)) if mojom.IsMapKind(kind): return ("mojo::MapDataView<%s, %s>" % (self._GetCppDataViewType(kind.key_kind, qualified), self._GetCppDataViewType(kind.value_kind, qualified))) if mojom.IsStringKind(kind): return "mojo::StringDataView" if mojom.IsInterfaceKind(kind): return "%sPtrDataView" % _GetName(kind) if mojom.IsInterfaceRequestKind(kind): return "%sRequestDataView" % _GetName(kind.kind) if mojom.IsAssociatedInterfaceKind(kind): return "%sAssociatedPtrInfoDataView" % _GetName(kind.kind) if mojom.IsAssociatedInterfaceRequestKind(kind): return "%sAssociatedRequestDataView" % _GetName(kind.kind) if mojom.IsGenericHandleKind(kind): return "mojo::ScopedHandle" if mojom.IsDataPipeConsumerKind(kind): return "mojo::ScopedDataPipeConsumerHandle" if mojom.IsDataPipeProducerKind(kind): return "mojo::ScopedDataPipeProducerHandle" if mojom.IsMessagePipeKind(kind): return "mojo::ScopedMessagePipeHandle" if mojom.IsSharedBufferKind(kind): return "mojo::ScopedSharedBufferHandle" return _kind_to_cpp_type[kind] def _GetUnmappedTypeForSerializer(self, kind): return self._GetCppDataViewType(kind, qualified=True)