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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 <io.h> | |
| 14 #include "webrtc/base/win32.h" | |
| 15 | |
| 16 #include <limits> // NOLINT: win32.h should be considered a system header | |
| 17 | |
| 18 #include "webrtc/base/checks.h" | |
| 19 | |
| 20 namespace rtc { | |
| 21 | |
| 22 size_t File::Write(const uint8_t* data, size_t length) { | |
| 23 RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max()); | |
| 24 size_t total_written = 0; | |
| 25 do { | |
| 26 DWORD written; | |
| 27 if (!::WriteFile(file_, data + total_written, | |
| 28 static_cast<DWORD>(length - total_written), &written, | |
| 29 nullptr)) { | |
| 30 break; | |
| 31 } | |
| 32 total_written += written; | |
| 33 } while (total_written < length); | |
| 34 return total_written; | |
| 35 } | |
| 36 | |
| 37 size_t File::Read(uint8_t* buffer, size_t length) { | |
| 38 RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max()); | |
| 39 size_t total_read = 0; | |
| 40 do { | |
| 41 DWORD read; | |
| 42 if (!::ReadFile(file_, buffer + total_read, | |
| 43 static_cast<DWORD>(length - total_read), &read, nullptr)) { | |
| 44 break; | |
| 45 } | |
| 46 total_read += read; | |
| 47 } while (total_read < length); | |
| 48 return total_read; | |
| 49 } | |
| 50 | |
| 51 size_t File::WriteAt(const uint8_t* data, size_t length, size_t offset) { | |
| 52 RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max()); | |
| 53 size_t total_written = 0; | |
| 54 do { | |
| 55 DWORD written; | |
| 56 | |
| 57 LARGE_INTEGER offset_li; | |
| 58 offset_li.QuadPart = offset + total_written; | |
| 59 | |
| 60 OVERLAPPED overlapped = {0}; | |
| 61 overlapped.Offset = offset_li.LowPart; | |
| 62 overlapped.OffsetHigh = offset_li.HighPart; | |
| 63 | |
| 64 if (!::WriteFile(file_, data + total_written, | |
| 65 static_cast<DWORD>(length - total_written), &written, | |
| 66 &overlapped)) { | |
| 67 break; | |
| 68 } | |
| 69 | |
| 70 total_written += written; | |
| 71 } while (total_written < length); | |
| 72 return total_written; | |
| 73 } | |
| 74 | |
| 75 size_t File::ReadAt(uint8_t* buffer, size_t length, size_t offset) { | |
| 76 RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max()); | |
| 77 size_t total_read = 0; | |
| 78 do { | |
| 79 DWORD read; | |
| 80 | |
| 81 LARGE_INTEGER offset_li; | |
| 82 offset_li.QuadPart = offset + total_read; | |
| 83 | |
| 84 OVERLAPPED overlapped = {0}; | |
| 85 overlapped.Offset = offset_li.LowPart; | |
| 86 overlapped.OffsetHigh = offset_li.HighPart; | |
| 87 | |
| 88 if (!::ReadFile(file_, buffer + total_read, | |
| 89 static_cast<DWORD>(length - total_read), &read, | |
| 90 &overlapped)) { | |
| 91 break; | |
| 92 } | |
| 93 | |
| 94 total_read += read; | |
| 95 } while (total_read < length); | |
| 96 return total_read; | |
| 97 } | |
| 98 | |
| 99 bool File::Seek(size_t offset) { | |
| 100 LARGE_INTEGER distance; | |
| 101 distance.QuadPart = offset; | |
| 102 return SetFilePointerEx(file_, distance, nullptr, FILE_BEGIN) != 0; | |
| 103 } | |
| 104 | |
| 105 bool File::Close() { | |
| 106 if (file_ == kInvalidPlatformFileValue) | |
| 107 return false; | |
| 108 bool ret = CloseHandle(file_) != 0; | |
| 109 file_ = kInvalidPlatformFileValue; | |
| 110 return ret; | |
| 111 } | |
| 112 | |
| 113 } // namespace rtc | |
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Chromium Code Reviews
Issue 2877023002:
Move webrtc/{base => rtc_base} (Closed)
