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
25namespace android {
26namespace spirit {
27
28template <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
51template <typename T> std::vector<T> readFile(const std::string &filename) {
52  return readFile<T>(filename.c_str());
53}
54
55template <typename T>
56void 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