1/*
2 * Copyright (c) 2016-2017, Intel Corporation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * * Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of Intel Corporation nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef DUMP_UTIL
30#define DUMP_UTIL
31
32#include "noncopyable.h"
33
34#include <cstdio>
35#include <memory>
36#include <string>
37
38namespace ue2 {
39
40/**
41 * Same as fopen(), but on error throws an exception rather than returning NULL.
42 */
43FILE *fopen_or_throw(const char *path, const char *mode);
44
45/**
46 * \brief Helper class: wraps C stdio FILE* handle and takes care of closing
47 * the file on destruction.
48 */
49class StdioFile : noncopyable {
50public:
51 StdioFile(const std::string &filename, const char *mode)
52 : handle(fopen_or_throw(filename.c_str(), mode), &fclose) {}
53
54 // Implicit conversion to FILE* for use by stdio calls.
55 operator FILE *() { return handle.get(); }
56
57private:
58 std::unique_ptr<FILE, decltype(&fclose)> handle;
59};
60
61} // namespace ue2
62
63#endif
64