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Side by Side Diff: webrtc/base/file_posix.cc

Issue 2877023002: Move webrtc/{base => rtc_base} (Closed)
Patch Set: update presubmit.py and DEPS include rules Created 3 years, 5 months ago
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1 /*
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "webrtc/base/file.h"
12
13 #include <errno.h>
14 #include <fcntl.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 #include <unistd.h>
18
19 #include <limits>
20
21 #include "webrtc/base/checks.h"
22
23 namespace rtc {
24
25 size_t File::Write(const uint8_t* data, size_t length) {
26 size_t total_written = 0;
27 do {
28 ssize_t written;
29 do {
30 written = ::write(file_, data + total_written, length - total_written);
31 } while (written == -1 && errno == EINTR);
32 if (written == -1)
33 break;
34 total_written += written;
35 } while (total_written < length);
36 return total_written;
37 }
38
39 size_t File::Read(uint8_t* buffer, size_t length) {
40 size_t total_read = 0;
41 do {
42 ssize_t read;
43 do {
44 read = ::read(file_, buffer + total_read, length - total_read);
45 } while (read == -1 && errno == EINTR);
46 if (read == -1)
47 break;
48 total_read += read;
49 } while (total_read < length);
50 return total_read;
51 }
52
53 size_t File::WriteAt(const uint8_t* data, size_t length, size_t offset) {
54 size_t total_written = 0;
55 do {
56 ssize_t written;
57 do {
58 written = ::pwrite(file_, data + total_written, length - total_written,
59 offset + total_written);
60 } while (written == -1 && errno == EINTR);
61 if (written == -1)
62 break;
63 total_written += written;
64 } while (total_written < length);
65 return total_written;
66 }
67
68 size_t File::ReadAt(uint8_t* buffer, size_t length, size_t offset) {
69 size_t total_read = 0;
70 do {
71 ssize_t read;
72 do {
73 read = ::pread(file_, buffer + total_read, length - total_read,
74 offset + total_read);
75 } while (read == -1 && errno == EINTR);
76 if (read == -1)
77 break;
78 total_read += read;
79 } while (total_read < length);
80 return total_read;
81 }
82
83 bool File::Seek(size_t offset) {
84 RTC_DCHECK_LE(offset, std::numeric_limits<off_t>::max());
85 return lseek(file_, static_cast<off_t>(offset), SEEK_SET) != -1;
86 }
87
88 bool File::Close() {
89 if (file_ == rtc::kInvalidPlatformFileValue)
90 return false;
91 bool ret = close(file_) == 0;
92 file_ = rtc::kInvalidPlatformFileValue;
93 return ret;
94 }
95
96 } // namespace rtc
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