Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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#include <iostream>
#include <string>
#ifdef _WIN32
#include <fcntl.h>
#else
#include <unistd.h>
#endif
#include "google/protobuf/descriptor.pb.h"
#include "absl/flags/flag.h"
#include "absl/flags/parse.h"
#include "absl/log/absl_log.h"
#include "absl/strings/escaping.h"
#if defined(_WIN32)
#include "google/protobuf/io/io_win32.h"
// DO NOT include <io.h>, instead create functions in io_win32.{h,cc} and import
// them like we do below.
using google::protobuf::io::win32::setmode;
#endif
ABSL_FLAG(std::string, encoding, "octal",
"The encoding to use for the output.");
int main(int argc, char *argv[]) {
absl::ParseCommandLine(argc, argv);
#ifdef _WIN32
setmode(STDIN_FILENO, _O_BINARY);
setmode(STDOUT_FILENO, _O_BINARY);
#endif
google::protobuf::FeatureSetDefaults defaults;
if (!defaults.ParseFromFileDescriptor(STDIN_FILENO)) {
std::cerr << argv[0] << ": unable to parse edition defaults." << std::endl;
return 1;
}
std::string output;
defaults.SerializeToString(&output);
std::string encoding = absl::GetFlag(FLAGS_encoding);
if (encoding == "base64") {
std::cout << absl::Base64Escape(output);
} else if (encoding == "octal") {
std::cout << absl::CEscape(output);
} else {
ABSL_LOG(FATAL) << "Unknown encoding: " << encoding;
}
return 0;
}