Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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202 lines
7.5 KiB
202 lines
7.5 KiB
1 year ago
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// Protocol Buffers - Google's data interchange format
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// Copyright 2023 Google LLC. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google LLC nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2 years ago
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#include "protos_generator/names.h"
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#include <string>
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#include "upbc/keywords.h"
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namespace protos_generator {
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namespace protobuf = ::google::protobuf;
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namespace {
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std::string NamespaceFromPackageName(absl::string_view package_name) {
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return absl::StrCat(absl::StrReplaceAll(package_name, {{".", "::"}}),
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"::protos");
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}
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std::string DotsToColons(const std::string& name) {
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return absl::StrReplaceAll(name, {{".", "::"}});
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}
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std::string Namespace(const std::string& package) {
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if (package.empty()) return "";
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return "::" + DotsToColons(package);
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}
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// Return the qualified C++ name for a file level symbol.
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std::string QualifiedFileLevelSymbol(const protobuf::FileDescriptor* file,
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const std::string& name) {
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if (file->package().empty()) {
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return absl::StrCat("::", name);
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}
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// Append ::protos postfix to package name.
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return absl::StrCat(Namespace(file->package()), "::protos::", name);
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}
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std::string CppTypeInternal(const protobuf::FieldDescriptor* field,
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bool is_const, bool is_type_parameter) {
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std::string maybe_const = is_const ? "const " : "";
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switch (field->cpp_type()) {
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case protobuf::FieldDescriptor::CPPTYPE_MESSAGE: {
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if (is_type_parameter) {
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return absl::StrCat(maybe_const,
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QualifiedClassName(field->message_type()));
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} else {
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return absl::StrCat(maybe_const,
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QualifiedClassName(field->message_type()), "*");
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}
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}
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case protobuf::FieldDescriptor::CPPTYPE_BOOL:
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return "bool";
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case protobuf::FieldDescriptor::CPPTYPE_FLOAT:
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return "float";
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case protobuf::FieldDescriptor::CPPTYPE_INT32:
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case protobuf::FieldDescriptor::CPPTYPE_ENUM:
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return "int32_t";
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case protobuf::FieldDescriptor::CPPTYPE_UINT32:
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return "uint32_t";
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case protobuf::FieldDescriptor::CPPTYPE_DOUBLE:
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return "double";
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case protobuf::FieldDescriptor::CPPTYPE_INT64:
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return "int64_t";
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case protobuf::FieldDescriptor::CPPTYPE_UINT64:
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return "uint64_t";
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case protobuf::FieldDescriptor::CPPTYPE_STRING:
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return "absl::string_view";
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default:
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ABSL_LOG(FATAL) << "Unexpected type: " << field->cpp_type();
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}
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}
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} // namespace
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std::string ClassName(const protobuf::Descriptor* descriptor) {
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const protobuf::Descriptor* parent = descriptor->containing_type();
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std::string res;
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// Classes in global namespace without package names are prefixed
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// by protos_ to avoid collision with C compiler structs defined in
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// proto.upb.h.
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if ((parent && parent->file()->package().empty()) ||
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descriptor->file()->package().empty()) {
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res = std::string(kNoPackageNamePrefix);
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}
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if (parent) res += ClassName(parent) + "_";
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absl::StrAppend(&res, descriptor->name());
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return ::upbc::ResolveKeywordConflict(res);
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}
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std::string QualifiedClassName(const protobuf::Descriptor* descriptor) {
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return QualifiedFileLevelSymbol(descriptor->file(), ClassName(descriptor));
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}
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std::string QualifiedInternalClassName(const protobuf::Descriptor* descriptor) {
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return QualifiedFileLevelSymbol(
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descriptor->file(), absl::StrCat("internal::", ClassName(descriptor)));
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}
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std::string CppSourceFilename(const google::protobuf::FileDescriptor* file) {
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return StripExtension(file->name()) + ".upb.proto.cc";
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}
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std::string ForwardingHeaderFilename(const google::protobuf::FileDescriptor* file) {
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return StripExtension(file->name()) + ".upb.fwd.h";
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}
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std::string UpbCFilename(const google::protobuf::FileDescriptor* file) {
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return StripExtension(file->name()) + ".upb.h";
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}
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std::string CppHeaderFilename(const google::protobuf::FileDescriptor* file) {
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return StripExtension(file->name()) + ".upb.proto.h";
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}
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void WriteStartNamespace(const protobuf::FileDescriptor* file, Output& output) {
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// Skip namespace generation if package name is not specified.
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if (file->package().empty()) {
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return;
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}
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output("namespace $0 {\n\n", NamespaceFromPackageName(file->package()));
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}
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void WriteEndNamespace(const protobuf::FileDescriptor* file, Output& output) {
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if (file->package().empty()) {
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return;
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}
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output("} // namespace $0\n\n", NamespaceFromPackageName(file->package()));
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}
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std::string CppConstType(const protobuf::FieldDescriptor* field) {
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return CppTypeInternal(field, /* is_const= */ true,
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/* is_type_parameter= */ false);
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}
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std::string CppTypeParameterName(const protobuf::FieldDescriptor* field) {
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return CppTypeInternal(field, /* is_const= */ false,
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/* is_type_parameter= */ true);
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}
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std::string MessageBaseType(const protobuf::FieldDescriptor* field,
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bool is_const) {
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ABSL_DCHECK(field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE);
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std::string maybe_const = is_const ? "const " : "";
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return maybe_const + QualifiedClassName(field->message_type());
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}
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std::string MessagePtrConstType(const protobuf::FieldDescriptor* field,
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bool is_const) {
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ABSL_DCHECK(field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE);
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std::string maybe_const = is_const ? "const " : "";
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return "::protos::Ptr<" + maybe_const +
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QualifiedClassName(field->message_type()) + ">";
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}
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std::string MessageCProxyType(const protobuf::FieldDescriptor* field,
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bool is_const) {
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ABSL_DCHECK(field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE);
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std::string maybe_const = is_const ? "const " : "";
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return maybe_const + QualifiedInternalClassName(field->message_type()) +
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"CProxy";
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}
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std::string MessageProxyType(const protobuf::FieldDescriptor* field,
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bool is_const) {
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ABSL_DCHECK(field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE);
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std::string maybe_const = is_const ? "const " : "";
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return maybe_const + QualifiedInternalClassName(field->message_type()) +
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"Proxy";
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}
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} // namespace protos_generator
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