105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <fcntl.h>
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#include <unistd.h>
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#include <fstream>
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#include <iostream>
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#include <string>
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#include "absl/flags/flag.h"
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#include "absl/flags/parse.h"
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#include "absl/log/globals.h"
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#include "absl/log/initialize.h"
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#include "contrib/zopfli/sandboxed.h"
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#include "contrib/zopfli/utils/utils_zopfli.h"
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ABSL_FLAG(bool, stream, false, "stream memory to sandbox");
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ABSL_FLAG(bool, zlib, false, "zlib compression");
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ABSL_FLAG(bool, gzip, false, "gzip compression");
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absl::Status CompressMain(ZopfliApi& api, std::string& infile_s,
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std::string& outfile_s, ZopfliFormat format) {
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std::ifstream infile(infile_s, std::ios::binary);
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if (!infile.is_open()) {
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return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
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}
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std::ofstream outfile(outfile_s, std::ios::binary);
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if (!outfile.is_open()) {
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return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
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}
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return Compress(api, infile, outfile, format);
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}
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absl::Status CompressMainFD(ZopfliApi& api, std::string& infile_s,
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std::string& outfile_s, ZopfliFormat format) {
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sapi::v::Fd infd(open(infile_s.c_str(), O_RDONLY));
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if (infd.GetValue() < 0) {
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return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
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}
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sapi::v::Fd outfd(open(outfile_s.c_str(), O_WRONLY | O_CREAT));
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if (outfd.GetValue() < 0) {
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return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
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}
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return (CompressFD(api, infd, outfd, format));
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}
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int main(int argc, char* argv[]) {
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std::string prog_name(argv[0]);
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absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
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std::vector<char*> args = absl::ParseCommandLine(argc, argv);
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absl::InitializeLog();
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if (args.size() != 3) {
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std::cerr << "Usage:\n " << prog_name << " INPUT OUTPUT\n";
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return EXIT_FAILURE;
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}
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ZopfliSapiSandbox sandbox;
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if (!sandbox.Init().ok()) {
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std::cerr << "Unable to start sandbox\n";
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return EXIT_FAILURE;
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}
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std::string infile_s(args[1]);
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std::string outfile_s(args[2]);
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ZopfliApi api(&sandbox);
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ZopfliFormat format = ZOPFLI_FORMAT_DEFLATE;
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if (absl::GetFlag(FLAGS_zlib)) {
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format = ZOPFLI_FORMAT_ZLIB;
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} else if (absl::GetFlag(FLAGS_gzip)) {
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format = ZOPFLI_FORMAT_GZIP;
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}
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absl::Status status;
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if (absl::GetFlag(FLAGS_stream)) {
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status = CompressMain(api, infile_s, outfile_s, format);
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} else {
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status = CompressMainFD(api, infile_s, outfile_s, format);
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}
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if (!status.ok()) {
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std::cerr << "Unable to compress file.\n";
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std::cerr << status << std::endl;
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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