1 // Copyright 2016 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROMIUMOS_WIDE_PROFILING_FILE_UTILS_H_ 6 #define CHROMIUMOS_WIDE_PROFILING_FILE_UTILS_H_ 7 8 #include <vector> 9 10 #include "base/logging.h" 11 #include "compat/string.h" 12 13 namespace quipper { 14 15 // Reads the contents of a file into |contents|. Returns true on success, false 16 // if it fails. 17 bool FileToBuffer(const string& filename, std::vector<char>* contents); 18 19 // Writes |contents| to a file, overwriting the file if it exists. Returns true 20 // on success, false if it fails. 21 template <typename CharContainer> 22 bool BufferToFile(const string& filename, const CharContainer& contents) { 23 FILE* fp = fopen(filename.c_str(), "wb"); 24 if (!fp) return false; 25 // Do not write anything if |contents| contains nothing. fopen will create 26 // an empty file. 27 if (!contents.empty()) { 28 CHECK_EQ(fwrite(contents.data(), sizeof(typename CharContainer::value_type), 29 contents.size(), fp), 30 contents.size()); 31 } 32 fclose(fp); 33 return true; 34 } 35 36 // Returns true iff the file exists. 37 bool FileExists(const string& filename); 38 39 } // namespace quipper 40 41 #endif // CHROMIUMOS_WIDE_PROFILING_FILE_UTILS_H_ 42
