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
readFile(const char * filename)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
readFile(const std::string & filename)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>
writeFile(const char * filename,const std::vector<T> & data)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