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a8005cfd8b
This splits things out of rtc_base and makes dependencies explicit. Bug: webrtc:6828 Change-Id: Id521896c3c43595349021c857bec216e429a0c8d Reviewed-on: https://webrtc-review.googlesource.com/32780 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21264}
113 lines
3 KiB
C++
113 lines
3 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/file.h"
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#include <io.h>
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#include <windows.h>
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#include <limits>
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#include "rtc_base/checks.h"
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namespace rtc {
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size_t File::Write(const uint8_t* data, size_t length) {
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RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max());
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size_t total_written = 0;
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do {
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DWORD written;
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if (!::WriteFile(file_, data + total_written,
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static_cast<DWORD>(length - total_written), &written,
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nullptr)) {
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break;
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}
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total_written += written;
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} while (total_written < length);
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return total_written;
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}
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size_t File::Read(uint8_t* buffer, size_t length) {
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RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max());
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size_t total_read = 0;
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do {
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DWORD read;
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if (!::ReadFile(file_, buffer + total_read,
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static_cast<DWORD>(length - total_read), &read, nullptr)) {
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break;
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}
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total_read += read;
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} while (total_read < length);
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return total_read;
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}
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size_t File::WriteAt(const uint8_t* data, size_t length, size_t offset) {
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RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max());
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size_t total_written = 0;
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do {
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DWORD written;
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LARGE_INTEGER offset_li;
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offset_li.QuadPart = offset + total_written;
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OVERLAPPED overlapped = {0};
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overlapped.Offset = offset_li.LowPart;
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overlapped.OffsetHigh = offset_li.HighPart;
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if (!::WriteFile(file_, data + total_written,
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static_cast<DWORD>(length - total_written), &written,
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&overlapped)) {
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break;
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}
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total_written += written;
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} while (total_written < length);
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return total_written;
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}
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size_t File::ReadAt(uint8_t* buffer, size_t length, size_t offset) {
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RTC_DCHECK_LT(length, std::numeric_limits<DWORD>::max());
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size_t total_read = 0;
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do {
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DWORD read;
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LARGE_INTEGER offset_li;
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offset_li.QuadPart = offset + total_read;
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OVERLAPPED overlapped = {0};
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overlapped.Offset = offset_li.LowPart;
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overlapped.OffsetHigh = offset_li.HighPart;
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if (!::ReadFile(file_, buffer + total_read,
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static_cast<DWORD>(length - total_read), &read,
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&overlapped)) {
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break;
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}
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total_read += read;
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} while (total_read < length);
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return total_read;
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}
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bool File::Seek(size_t offset) {
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LARGE_INTEGER distance;
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distance.QuadPart = offset;
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return SetFilePointerEx(file_, distance, nullptr, FILE_BEGIN) != 0;
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}
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bool File::Close() {
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if (file_ == kInvalidPlatformFileValue)
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return false;
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bool ret = CloseHandle(file_) != 0;
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file_ = kInvalidPlatformFileValue;
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return ret;
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}
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} // namespace rtc
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