| # Copyright 2013 The Chromium Authors. All rights reserved. |
| # 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 a mojom.Module.""" |
| |
| 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 |
| |
| |
| _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.HANDLE: "mojo::Handle", |
| mojom.DCPIPE: "mojo::DataPipeConsumerHandle", |
| mojom.DPPIPE: "mojo::DataPipeProducerHandle", |
| mojom.MSGPIPE: "mojo::MessagePipeHandle", |
| mojom.SHAREDBUFFER: "mojo::SharedBufferHandle", |
| mojom.NULLABLE_HANDLE: "mojo::Handle", |
| mojom.NULLABLE_DCPIPE: "mojo::DataPipeConsumerHandle", |
| mojom.NULLABLE_DPPIPE: "mojo::DataPipeProducerHandle", |
| mojom.NULLABLE_MSGPIPE: "mojo::MessagePipeHandle", |
| mojom.NULLABLE_SHAREDBUFFER: "mojo::SharedBufferHandle", |
| 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", |
| } |
| |
| def ConstantValue(constant): |
| return ExpressionToText(constant.value, kind=constant.kind) |
| |
| def DefaultValue(field): |
| if field.default: |
| if mojom.IsStructKind(field.kind): |
| assert field.default == "default" |
| return "%s::New()" % GetNameForKind(field.kind) |
| return ExpressionToText(field.default, kind=field.kind) |
| return "" |
| |
| def NamespaceToArray(namespace): |
| return namespace.split('.') if namespace else [] |
| |
| def GetNameForKind(kind, internal = False): |
| parts = [] |
| if kind.imported_from: |
| parts.extend(NamespaceToArray(kind.imported_from["namespace"])) |
| if internal: |
| parts.append("internal") |
| if kind.parent_kind: |
| parts.append(kind.parent_kind.name) |
| parts.append(kind.name) |
| return "::".join(parts) |
| |
| def GetCppType(kind): |
| if mojom.IsArrayKind(kind): |
| return "mojo::internal::Array_Data<%s>*" % GetCppType(kind.kind) |
| if mojom.IsMapKind(kind): |
| return "mojo::internal::Map_Data<%s, %s>*" % ( |
| GetCppType(kind.key_kind), GetCppType(kind.value_kind)) |
| if mojom.IsStructKind(kind): |
| return "%s_Data*" % GetNameForKind(kind, internal=True) |
| if mojom.IsInterfaceKind(kind) or mojom.IsInterfaceRequestKind(kind): |
| return "mojo::MessagePipeHandle" |
| if mojom.IsEnumKind(kind): |
| return "int32_t" |
| if mojom.IsStringKind(kind): |
| return "mojo::internal::String_Data*" |
| return _kind_to_cpp_type[kind] |
| |
| def GetCppPodType(kind): |
| if mojom.IsStringKind(kind): |
| return "char*" |
| return _kind_to_cpp_type[kind] |
| |
| def GetCppArrayArgWrapperType(kind): |
| if mojom.IsEnumKind(kind): |
| return GetNameForKind(kind) |
| if mojom.IsStructKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsArrayKind(kind): |
| return "mojo::Array<%s> " % GetCppArrayArgWrapperType(kind.kind) |
| if mojom.IsMapKind(kind): |
| return "mojo::Map<%s, %s> " % (GetCppArrayArgWrapperType(kind.key_kind), |
| GetCppArrayArgWrapperType(kind.value_kind)) |
| if mojom.IsInterfaceKind(kind): |
| raise Exception("Arrays of interfaces not yet supported!") |
| if mojom.IsInterfaceRequestKind(kind): |
| raise Exception("Arrays of interface requests not yet supported!") |
| if mojom.IsStringKind(kind): |
| return "mojo::String" |
| if mojom.IsHandleKind(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 GetCppResultWrapperType(kind): |
| if mojom.IsEnumKind(kind): |
| return GetNameForKind(kind) |
| if mojom.IsStructKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsArrayKind(kind): |
| return "mojo::Array<%s>" % GetCppArrayArgWrapperType(kind.kind) |
| if mojom.IsMapKind(kind): |
| return "mojo::Map<%s, %s>" % (GetCppArrayArgWrapperType(kind.key_kind), |
| GetCppArrayArgWrapperType(kind.value_kind)) |
| if mojom.IsInterfaceKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsInterfaceRequestKind(kind): |
| return "mojo::InterfaceRequest<%s>" % GetNameForKind(kind.kind) |
| if mojom.IsStringKind(kind): |
| return "mojo::String" |
| if mojom.IsHandleKind(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 GetCppWrapperType(kind): |
| if mojom.IsEnumKind(kind): |
| return GetNameForKind(kind) |
| if mojom.IsStructKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsArrayKind(kind): |
| return "mojo::Array<%s>" % GetCppArrayArgWrapperType(kind.kind) |
| if mojom.IsMapKind(kind): |
| return "mojo::Map<%s, %s>" % (GetCppArrayArgWrapperType(kind.key_kind), |
| GetCppArrayArgWrapperType(kind.value_kind)) |
| if mojom.IsInterfaceKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsInterfaceRequestKind(kind): |
| raise Exception("InterfaceRequest fields not supported!") |
| if mojom.IsStringKind(kind): |
| return "mojo::String" |
| if mojom.IsHandleKind(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 GetCppConstWrapperType(kind): |
| if mojom.IsStructKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsArrayKind(kind): |
| return "mojo::Array<%s>" % GetCppArrayArgWrapperType(kind.kind) |
| if mojom.IsMapKind(kind): |
| return "mojo::Map<%s, %s>" % (GetCppArrayArgWrapperType(kind.key_kind), |
| GetCppArrayArgWrapperType(kind.value_kind)) |
| if mojom.IsInterfaceKind(kind): |
| return "%sPtr" % GetNameForKind(kind) |
| if mojom.IsInterfaceRequestKind(kind): |
| return "mojo::InterfaceRequest<%s>" % GetNameForKind(kind.kind) |
| if mojom.IsEnumKind(kind): |
| return GetNameForKind(kind) |
| if mojom.IsStringKind(kind): |
| return "const mojo::String&" |
| if mojom.IsHandleKind(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" |
| if not kind in _kind_to_cpp_type: |
| print "missing:", kind.spec |
| return _kind_to_cpp_type[kind] |
| |
| def GetCppFieldType(kind): |
| if mojom.IsStructKind(kind): |
| return ("mojo::internal::StructPointer<%s_Data>" % |
| GetNameForKind(kind, internal=True)) |
| if mojom.IsArrayKind(kind): |
| return "mojo::internal::ArrayPointer<%s>" % GetCppType(kind.kind) |
| if mojom.IsMapKind(kind): |
| return ("mojo::internal::StructPointer<mojo::internal::Map_Data<%s, %s>>" % |
| (GetCppType(kind.key_kind), GetCppType(kind.value_kind))) |
| if mojom.IsInterfaceKind(kind) or mojom.IsInterfaceRequestKind(kind): |
| return "mojo::MessagePipeHandle" |
| if mojom.IsEnumKind(kind): |
| return GetNameForKind(kind) |
| if mojom.IsStringKind(kind): |
| return "mojo::internal::StringPointer" |
| return _kind_to_cpp_type[kind] |
| |
| def IsStructWithHandles(struct): |
| for pf in struct.packed.packed_fields: |
| if mojom.IsAnyHandleKind(pf.field.kind): |
| return True |
| return False |
| |
| def TranslateConstants(token, kind): |
| if isinstance(token, mojom.NamedValue): |
| # Both variable and enum constants are constructed like: |
| # Namespace::Struct::CONSTANT_NAME |
| # For enums, CONSTANT_NAME is ENUM_NAME_ENUM_VALUE. |
| name = [] |
| if token.imported_from: |
| name.extend(NamespaceToArray(token.namespace)) |
| if token.parent_kind: |
| name.append(token.parent_kind.name) |
| if isinstance(token, mojom.EnumValue): |
| name.append( |
| "%s_%s" % (generator.CamelCaseToAllCaps(token.enum.name), token.name)) |
| else: |
| name.append(token.name) |
| return "::".join(name) |
| |
| if isinstance(token, mojom.BuiltinValue): |
| if token.value == "double.INFINITY" or token.value == "float.INFINITY": |
| return "INFINITY"; |
| if token.value == "double.NEGATIVE_INFINITY" or \ |
| token.value == "float.NEGATIVE_INFINITY": |
| return "-INFINITY"; |
| if token.value == "double.NAN" or token.value == "float.NAN": |
| return "NAN"; |
| |
| if (kind is not None and mojom.IsFloatKind(kind)): |
| return token if token.isdigit() else token + "f"; |
| |
| # Per C++11, 2.14.2, the type of an integer literal is the first of the |
| # corresponding list in Table 6 in which its value can be represented. In this |
| # case, the list for decimal constants with no suffix is: |
| # int, long int, long long int |
| # The standard considers a program ill-formed if it contains an integer |
| # literal that cannot be represented by any of the allowed types. |
| # |
| # As it turns out, MSVC doesn't bother trying to fall back to long long int, |
| # so the integral constant -2147483648 causes it grief: it decides to |
| # represent 2147483648 as an unsigned integer, and then warns that the unary |
| # minus operator doesn't make sense on unsigned types. Doh! |
| if kind == mojom.INT32 and token == '-2147483648': |
| return '(-%d - 1) /* %s */' % ( |
| 2**31 - 1, 'Workaround for MSVC bug; see https://crbug.com/445618') |
| |
| return '%s%s' % (token, _kind_to_cpp_literal_suffix.get(kind, '')) |
| |
| def ExpressionToText(value, kind=None): |
| return TranslateConstants(value, kind) |
| |
| 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.IsMoveOnlyKind(field.kind): |
| return False |
| return True |
| |
| def GetArrayValidateParams(kind): |
| if (not mojom.IsArrayKind(kind) and not mojom.IsMapKind(kind) and |
| not mojom.IsStringKind(kind)): |
| return "mojo::internal::NoValidateParams" |
| |
| if mojom.IsStringKind(kind): |
| expected_num_elements = 0 |
| element_is_nullable = False |
| element_validate_params = "mojo::internal::NoValidateParams" |
| elif mojom.IsMapKind(kind): |
| expected_num_elements = 0 |
| element_is_nullable = mojom.IsNullableKind(kind.value_kind) |
| element_validate_params = GetArrayValidateParams(kind.value_kind) |
| else: |
| expected_num_elements = generator.ExpectedArraySize(kind) or 0 |
| element_is_nullable = mojom.IsNullableKind(kind.kind) |
| element_validate_params = GetArrayValidateParams(kind.kind) |
| |
| return "mojo::internal::ArrayValidateParams<%d, %s,\n%s> " % ( |
| expected_num_elements, |
| 'true' if element_is_nullable else 'false', |
| element_validate_params) |
| |
| def GetMapValidateParams(value_kind): |
| # Unlike GetArrayValidateParams, we are given the wrapped kind, instead of |
| # the raw array kind. So we wrap the return value of GetArrayValidateParams. |
| element_is_nullable = mojom.IsNullableKind(value_kind) |
| return "mojo::internal::ArrayValidateParams<0, %s,\n%s> " % ( |
| 'true' if element_is_nullable else 'false', |
| GetArrayValidateParams(value_kind)) |
| |
| _HEADER_SIZE = 8 |
| |
| class Generator(generator.Generator): |
| |
| cpp_filters = { |
| "constant_value": ConstantValue, |
| "cpp_const_wrapper_type": GetCppConstWrapperType, |
| "cpp_field_type": GetCppFieldType, |
| "cpp_pod_type": GetCppPodType, |
| "cpp_result_type": GetCppResultWrapperType, |
| "cpp_type": GetCppType, |
| "cpp_wrapper_type": GetCppWrapperType, |
| "default_value": DefaultValue, |
| "expression_to_text": ExpressionToText, |
| "get_array_validate_params": GetArrayValidateParams, |
| "get_map_validate_params": GetMapValidateParams, |
| "get_name_for_kind": GetNameForKind, |
| "get_pad": pack.GetPad, |
| "has_callbacks": mojom.HasCallbacks, |
| "should_inline": ShouldInlineStruct, |
| "is_array_kind": mojom.IsArrayKind, |
| "is_cloneable_kind": mojom.IsCloneableKind, |
| "is_enum_kind": mojom.IsEnumKind, |
| "is_move_only_kind": mojom.IsMoveOnlyKind, |
| "is_any_handle_kind": mojom.IsAnyHandleKind, |
| "is_interface_kind": mojom.IsInterfaceKind, |
| "is_interface_request_kind": mojom.IsInterfaceRequestKind, |
| "is_map_kind": mojom.IsMapKind, |
| "is_nullable_kind": mojom.IsNullableKind, |
| "is_object_kind": mojom.IsObjectKind, |
| "is_string_kind": mojom.IsStringKind, |
| "is_struct_kind": mojom.IsStructKind, |
| "is_struct_with_handles": IsStructWithHandles, |
| "struct_size": lambda ps: ps.GetTotalSize() + _HEADER_SIZE, |
| "struct_from_method": generator.GetStructFromMethod, |
| "response_struct_from_method": generator.GetResponseStructFromMethod, |
| "stylize_method": generator.StudlyCapsToCamel, |
| "to_all_caps": generator.CamelCaseToAllCaps, |
| } |
| |
| def GetJinjaExports(self): |
| return { |
| "module": self.module, |
| "namespace": self.module.namespace, |
| "namespaces_as_array": NamespaceToArray(self.module.namespace), |
| "imports": self.module.imports, |
| "kinds": self.module.kinds, |
| "enums": self.module.enums, |
| "structs": self.GetStructs(), |
| "interfaces": self.module.interfaces, |
| } |
| |
| @UseJinja("cpp_templates/module.h.tmpl", filters=cpp_filters) |
| def GenerateModuleHeader(self): |
| return self.GetJinjaExports() |
| |
| @UseJinja("cpp_templates/module-internal.h.tmpl", filters=cpp_filters) |
| def GenerateModuleInternalHeader(self): |
| return self.GetJinjaExports() |
| |
| @UseJinja("cpp_templates/module.cc.tmpl", filters=cpp_filters) |
| def GenerateModuleSource(self): |
| return self.GetJinjaExports() |
| |
| def GenerateFiles(self, args): |
| self.Write(self.GenerateModuleHeader(), |
| self.MatchMojomFilePath("%s.h" % self.module.name)) |
| self.Write(self.GenerateModuleInternalHeader(), |
| self.MatchMojomFilePath("%s-internal.h" % self.module.name)) |
| self.Write(self.GenerateModuleSource(), |
| self.MatchMojomFilePath("%s.cc" % self.module.name)) |
