1 /* 2 * Copyright 2017, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef FILE_UTILS_H 18 #define FILE_UTILS_H 19 20 #include <fstream> 21 #include <iostream> 22 #include <memory> 23 #include <vector> 24 25 namespace android { 26 namespace spirit { 27 28 template <typename T> std::vector<T> readFile(const char *filename) { 29 std::ifstream ifs; 30 std::filebuf *fb = ifs.rdbuf(); 31 fb->open(filename, std::ios::in); 32 33 if (!fb->is_open()) { 34 std::cerr << "failed opening " << filename << std::endl; 35 return std::vector<T>(); 36 } 37 38 ifs.seekg(0, ifs.end); 39 int length = ifs.tellg(); 40 ifs.seekg(0, ifs.beg); 41 42 std::vector<T> ret(length / sizeof(T)); 43 44 ifs.read((char *)ret.data(), length); 45 46 fb->close(); 47 48 return ret; 49 } 50 51 template <typename T> std::vector<T> readFile(const std::string &filename) { 52 return readFile<T>(filename.c_str()); 53 } 54 55 template <typename T> 56 void writeFile(const char *filename, const std::vector<T> &data) { 57 std::ofstream ofs(filename, std::ios::out); 58 59 ofs.write(reinterpret_cast<const char *>(data.data()), 60 sizeof(T) * data.size()); 61 } 62 63 } // namespace spirit 64 } // namespace android 65 66 #endif // FILE_UTILS_H 67
