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6a4d411023
This moves it from an API directory (system_wrappers/include/) to a non-API directory, which is exactly what we want for utilities like this. BUG=webrtc:8445 Change-Id: I440974da4d347b09ff042478720d7983056b62b9 Reviewed-on: https://webrtc-review.googlesource.com/21226 Commit-Queue: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22579}
88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/*
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* Copyright (c) 2011 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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#ifndef RTC_BASE_SYSTEM_FILE_WRAPPER_H_
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#define RTC_BASE_SYSTEM_FILE_WRAPPER_H_
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#include <stddef.h>
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#include <stdio.h>
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#include "common_types.h" // NOLINT(build/include)
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#include "rtc_base/criticalsection.h"
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#include "typedefs.h" // NOLINT(build/include)
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// Implementation of an InStream and OutStream that can read (exclusive) or
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// write from/to a file.
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namespace webrtc {
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// TODO(tommi): Remove the base classes, rename to rtc::File and move to base.
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class FileWrapper : public InStream, public OutStream {
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public:
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static const size_t kMaxFileNameSize = 1024;
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// Factory methods.
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// TODO(tommi): Remove Create().
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static FileWrapper* Create();
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static FileWrapper Open(const char* file_name_utf8, bool read_only);
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FileWrapper(FILE* file, size_t max_size);
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~FileWrapper() override;
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// Support for move semantics.
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FileWrapper(FileWrapper&& other);
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FileWrapper& operator=(FileWrapper&& other);
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// Returns true if a file has been opened.
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bool is_open() const { return file_ != nullptr; }
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// Opens a file in read or write mode, decided by the read_only parameter.
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bool OpenFile(const char* file_name_utf8, bool read_only);
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// Initializes the wrapper from an existing handle. The wrapper
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// takes ownership of |handle| and closes it in CloseFile().
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bool OpenFromFileHandle(FILE* handle);
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void CloseFile();
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// Limits the file size to |bytes|. Writing will fail after the cap
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// is hit. Pass zero to use an unlimited size.
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// TODO(tommi): Could we move this out into a separate class?
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void SetMaxFileSize(size_t bytes);
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// Flush any pending writes. Note: Flushing when closing, is not required.
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int Flush();
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// Rewinds the file to the start.
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int Rewind() override;
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int Read(void* buf, size_t length) override;
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bool Write(const void* buf, size_t length) override;
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private:
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FileWrapper();
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void CloseFileImpl();
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int FlushImpl();
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// TODO(tommi): Remove the lock.
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rtc::CriticalSection lock_;
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FILE* file_ = nullptr;
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size_t position_ = 0;
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size_t max_size_in_bytes_ = 0;
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// Copying is not supported.
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FileWrapper(const FileWrapper&) = delete;
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FileWrapper& operator=(const FileWrapper&) = delete;
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};
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} // namespace webrtc
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#endif // RTC_BASE_SYSTEM_FILE_WRAPPER_H_
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