| /* |
| * Copyright (c) 2018, Google Inc. |
| * All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "perf_to_profile_lib.h" |
| |
| #include <sys/stat.h> |
| #include <sstream> |
| |
| bool FileExists(const string& path) { |
| struct stat file_stat; |
| return stat(path.c_str(), &file_stat) != -1; |
| } |
| |
| string ReadFileToString(const string& path) { |
| std::ifstream perf_file(path); |
| if (!perf_file.is_open()) { |
| LOG(FATAL) << "Failed to open file: " << path; |
| } |
| std::ostringstream ss; |
| ss << perf_file.rdbuf(); |
| return ss.str(); |
| } |
| |
| void CreateFile(const string& path, std::ofstream* file, bool overwriteOutput) { |
| if (!overwriteOutput && FileExists(path)) { |
| LOG(FATAL) << "File already exists: " << path; |
| } |
| file->open(path, std::ios_base::trunc); |
| if (!file->is_open()) { |
| LOG(FATAL) << "Failed to open file: " << path; |
| } |
| } |
| |
| void PrintUsage() { |
| LOG(INFO) << "Usage:"; |
| LOG(INFO) << "perf_to_profile -i <input perf data> -o <output profile> [-f]"; |
| LOG(INFO) << "If the -f option is given, overwrite the existing output " |
| << "profile."; |
| } |
| |
| bool ParseArguments(int argc, const char* argv[], string* input, string* output, |
| bool* overwriteOutput) { |
| *input = ""; |
| *output = ""; |
| *overwriteOutput = false; |
| int opt; |
| while ((opt = getopt(argc, const_cast<char* const*>(argv), ":fi:o:")) != -1) { |
| switch (opt) { |
| case 'i': |
| *input = optarg; |
| break; |
| case 'o': |
| *output = optarg; |
| break; |
| case 'f': |
| *overwriteOutput = true; |
| break; |
| case ':': |
| LOG(ERROR) << "Must provide arguments for flags -i and -o"; |
| return false; |
| case '?': |
| LOG(ERROR) << "Invalid option: " << static_cast<char>(optopt); |
| return false; |
| default: |
| LOG(ERROR) << "Invalid option: " << static_cast<char>(opt); |
| return false; |
| } |
| } |
| return !input->empty() && !output->empty(); |
| } |