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https://github.com/mollyim/webrtc.git
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5a6ae02e90
This is a reland of 80b95de765
Original change's description:
> Trim down FileWrapper class to be merely a wrapper owning a FILE*
>
> Bug: webrtc:6463
> Change-Id: If71e2f3a75dc1863bc805ab71de1e2d33294f805
> Reviewed-on: https://webrtc-review.googlesource.com/c/117881
> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
> Reviewed-by: Alex Loiko <aleloi@webrtc.org>
> Commit-Queue: Niels Moller <nisse@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#26311}
Bug: webrtc:6463
Change-Id: I12154ef65744c1b7811974a1d871e05ed3fbbc27
Reviewed-on: https://webrtc-review.googlesource.com/c/118660
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26337}
86 lines
2 KiB
C++
86 lines
2 KiB
C++
/*
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* Copyright (c) 2012 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/system/file_wrapper.h"
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#ifdef _WIN32
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#include <Windows.h>
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#else
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#include <string.h>
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#endif
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#include <utility>
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namespace webrtc {
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namespace {
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FILE* FileOpen(const char* file_name_utf8, bool read_only) {
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#if defined(_WIN32)
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int len = MultiByteToWideChar(CP_UTF8, 0, file_name_utf8, -1, nullptr, 0);
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std::wstring wstr(len, 0);
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MultiByteToWideChar(CP_UTF8, 0, file_name_utf8, -1, &wstr[0], len);
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FILE* file = _wfopen(wstr.c_str(), read_only ? L"rb" : L"wb");
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#else
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FILE* file = fopen(file_name_utf8, read_only ? "rb" : "wb");
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#endif
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return file;
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}
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} // namespace
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// static
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FileWrapper FileWrapper::OpenReadOnly(const char* file_name_utf8) {
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return FileWrapper(FileOpen(file_name_utf8, true));
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}
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// static
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FileWrapper FileWrapper::OpenWriteOnly(const char* file_name_utf8) {
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return FileWrapper(FileOpen(file_name_utf8, false));
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}
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FileWrapper::FileWrapper(FileWrapper&& other) {
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operator=(std::move(other));
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}
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FileWrapper& FileWrapper::operator=(FileWrapper&& other) {
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Close();
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file_ = other.file_;
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other.file_ = nullptr;
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return *this;
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}
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bool FileWrapper::Rewind() {
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RTC_DCHECK(file_);
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return fseek(file_, 0, SEEK_SET) == 0;
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}
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bool FileWrapper::Flush() {
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RTC_DCHECK(file_);
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return fflush(file_) == 0;
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}
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size_t FileWrapper::Read(void* buf, size_t length) {
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RTC_DCHECK(file_);
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return fread(buf, 1, length, file_);
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}
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bool FileWrapper::Write(const void* buf, size_t length) {
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RTC_DCHECK(file_);
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return fwrite(buf, 1, length, file_) == length;
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}
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bool FileWrapper::Close() {
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if (file_ == nullptr)
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return true;
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bool success = fclose(file_) == 0;
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file_ = nullptr;
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return success;
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}
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} // namespace webrtc
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