sandboxed-api/contrib/c-blosc/example/main.cc

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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <unistd.h>
#include <fstream>
#include <iostream>
#include <string>
#include "absl/flags/flag.h"
#include "absl/flags/parse.h"
#include "absl/log/globals.h"
#include "absl/log/initialize.h"
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#include "contrib/c-blosc/sandboxed.h"
#include "contrib/c-blosc/utils/utils_blosc.h"
ABSL_FLAG(bool, decompress, false, "decompress");
ABSL_FLAG(int, clevel, 5, "compression level");
ABSL_FLAG(uint32_t, nthreads, 5, "number of threads");
ABSL_FLAG(std::string, compressor, "blosclz",
"compressor engine. Available: blosclz, lz4, lz4hc, zlib, zstd");
absl::Status Stream(CbloscApi& api, std::string& infile_s,
std::string& outfile_s) {
std::ifstream infile(infile_s, std::ios::binary);
if (!infile.is_open()) {
return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
}
std::ofstream outfile(outfile_s, std::ios::binary);
if (!outfile.is_open()) {
return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
}
std::string compressor(absl::GetFlag(FLAGS_compressor));
if (absl::GetFlag(FLAGS_decompress)) {
return Decompress(api, infile, outfile, 5);
}
return Compress(api, infile, outfile, absl::GetFlag(FLAGS_clevel), compressor,
absl::GetFlag(FLAGS_nthreads));
}
int main(int argc, char* argv[]) {
std::string prog_name(argv[0]);
absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
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std::vector<char*> args = absl::ParseCommandLine(argc, argv);
absl::InitializeLog();
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if (args.size() != 3) {
std::cerr << "Usage:\n " << prog_name << " INPUT OUTPUT\n";
return EXIT_FAILURE;
}
CbloscSapiSandbox sandbox;
if (!sandbox.Init().ok()) {
std::cerr << "Unable to start sandbox\n";
return EXIT_FAILURE;
}
CbloscApi api(&sandbox);
if (absl::Status status = api.blosc_init(); !status.ok()) {
std::cerr << "Unable to init library\n";
std::cerr << status << std::endl;
return EXIT_FAILURE;
}
std::string infile_s(args[1]);
std::string outfile_s(args[2]);
if (absl::Status status = Stream(api, infile_s, outfile_s); !status.ok()) {
std::cerr << "Unable to ";
std::cerr << (absl::GetFlag(FLAGS_decompress) ? "de" : "");
std::cerr << "compress file\n";
std::cerr << status << std::endl;
return EXIT_FAILURE;
}
if (absl::Status status = api.blosc_destroy(); !status.ok()) {
std::cerr << "Unable to uninitialize library\n";
std::cerr << status << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}