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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google LLC nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef UPB_UPB_GENERATOR_PLUGIN_H_
#define UPB_UPB_GENERATOR_PLUGIN_H_
#include <stdio.h>
#include <string>
#include <vector>
#ifdef _WIN32
#include <fcntl.h>
#include <io.h>
#endif
// begin:google_only
// #ifndef UPB_BOOTSTRAP_STAGE0
// #include "google/protobuf/descriptor.upb.h"
// #include "google/protobuf/compiler/plugin.upb.h"
// #else
// #include "google/protobuf/compiler/plugin.upb.h"
// #include "google/protobuf/descriptor.upb.h"
// #endif
// end:google_only
// begin:github_only
#include "google/protobuf/compiler/plugin.upb.h"
#include "google/protobuf/descriptor.upb.h"
// end:github_only
#include "absl/container/flat_hash_set.h"
#include "absl/log/absl_log.h"
#include "absl/strings/str_split.h"
#include "absl/strings/string_view.h"
#include "upb/reflection/def.hpp"
// Must be last.
#include "upb/port/def.inc"
namespace upb {
namespace generator {
inline std::vector<std::pair<std::string, std::string>> ParseGeneratorParameter(
const absl::string_view text) {
std::vector<std::pair<std::string, std::string>> ret;
for (absl::string_view sp : absl::StrSplit(text, ',', absl::SkipEmpty())) {
std::string::size_type equals_pos = sp.find_first_of('=');
std::pair<std::string, std::string> value;
if (equals_pos == std::string::npos) {
value.first = std::string(sp);
} else {
value.first = std::string(sp.substr(0, equals_pos));
value.second = std::string(sp.substr(equals_pos + 1));
}
ret.push_back(std::move(value));
}
return ret;
}
class Plugin {
public:
Plugin() { ReadRequest(); }
~Plugin() { WriteResponse(); }
absl::string_view parameter() const {
return ToStringView(
UPB_DESC(compiler_CodeGeneratorRequest_parameter)(request_));
}
template <class T>
void GenerateFilesRaw(T&& func) {
absl::flat_hash_set<absl::string_view> files_to_generate;
size_t size;
const upb_StringView* file_to_generate = UPB_DESC(
compiler_CodeGeneratorRequest_file_to_generate)(request_, &size);
for (size_t i = 0; i < size; i++) {
files_to_generate.insert(
{file_to_generate[i].data, file_to_generate[i].size});
}
const UPB_DESC(FileDescriptorProto)* const* files =
UPB_DESC(compiler_CodeGeneratorRequest_proto_file)(request_, &size);
for (size_t i = 0; i < size; i++) {
upb::Status status;
absl::string_view name =
ToStringView(UPB_DESC(FileDescriptorProto_name)(files[i]));
func(files[i], files_to_generate.contains(name));
}
}
template <class T>
void GenerateFiles(T&& func) {
GenerateFilesRaw(
[this, &func](const UPB_DESC(FileDescriptorProto) * file_proto,
bool generate) {
upb::Status status;
upb::FileDefPtr file = pool_.AddFile(file_proto, &status);
if (!file) {
absl::string_view name =
ToStringView(UPB_DESC(FileDescriptorProto_name)(file_proto));
ABSL_LOG(FATAL) << "Couldn't add file " << name
<< " to DefPool: " << status.error_message();
}
if (generate) func(file);
});
}
void SetError(absl::string_view error) {
char* data =
static_cast<char*>(upb_Arena_Malloc(arena_.ptr(), error.size()));
memcpy(data, error.data(), error.size());
UPB_DESC(compiler_CodeGeneratorResponse_set_error)
(response_, upb_StringView_FromDataAndSize(data, error.size()));
}
void AddOutputFile(absl::string_view filename, absl::string_view content) {
UPB_DESC(compiler_CodeGeneratorResponse_File)* file = UPB_DESC(
compiler_CodeGeneratorResponse_add_file)(response_, arena_.ptr());
UPB_DESC(compiler_CodeGeneratorResponse_File_set_name)
(file, StringDup(filename));
UPB_DESC(compiler_CodeGeneratorResponse_File_set_content)
(file, StringDup(content));
}
private:
upb::Arena arena_;
upb::DefPool pool_;
UPB_DESC(compiler_CodeGeneratorRequest) * request_;
UPB_DESC(compiler_CodeGeneratorResponse) * response_;
static absl::string_view ToStringView(upb_StringView sv) {
return absl::string_view(sv.data, sv.size);
}
upb_StringView StringDup(absl::string_view s) {
char* data =
reinterpret_cast<char*>(upb_Arena_Malloc(arena_.ptr(), s.size()));
memcpy(data, s.data(), s.size());
return upb_StringView_FromDataAndSize(data, s.size());
}
std::string ReadAllStdinBinary() {
std::string data;
#ifdef _WIN32
_setmode(_fileno(stdin), _O_BINARY);
_setmode(_fileno(stdout), _O_BINARY);
#endif
char buf[4096];
while (size_t len = fread(buf, 1, sizeof(buf), stdin)) {
data.append(buf, len);
}
return data;
}
void ReadRequest() {
std::string data = ReadAllStdinBinary();
request_ = UPB_DESC(compiler_CodeGeneratorRequest_parse)(
data.data(), data.size(), arena_.ptr());
if (!request_) {
ABSL_LOG(FATAL) << "Failed to parse CodeGeneratorRequest";
}
response_ = UPB_DESC(compiler_CodeGeneratorResponse_new)(arena_.ptr());
UPB_DESC(compiler_CodeGeneratorResponse_set_supported_features)
(response_,
UPB_DESC(compiler_CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL));
}
void WriteResponse() {
size_t size;
char* serialized = UPB_DESC(compiler_CodeGeneratorResponse_serialize)(
response_, arena_.ptr(), &size);
if (!serialized) {
ABSL_LOG(FATAL) << "Failed to serialize CodeGeneratorResponse";
}
if (fwrite(serialized, 1, size, stdout) != size) {
ABSL_LOG(FATAL) << "Failed to write response to stdout";
}
}
};
} // namespace generator
} // namespace upb
#include "upb/port/undef.inc"
#endif // UPB_UPB_GENERATOR_PLUGIN_H_
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