67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
// Copyright 2014 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <cstddef>
|
|
#include "common/common_types.h"
|
|
#include "core/hle/result.h"
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// FileSys namespace
|
|
|
|
namespace FileSys {
|
|
|
|
class FileBackend : NonCopyable {
|
|
public:
|
|
FileBackend() {}
|
|
virtual ~FileBackend() {}
|
|
|
|
/**
|
|
* Read data from the file
|
|
* @param offset Offset in bytes to start reading data from
|
|
* @param length Length in bytes of data to read from file
|
|
* @param buffer Buffer to read data into
|
|
* @return Number of bytes read, or error code
|
|
*/
|
|
virtual ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const = 0;
|
|
|
|
/**
|
|
* Write data to the file
|
|
* @param offset Offset in bytes to start writing data to
|
|
* @param length Length in bytes of data to write to file
|
|
* @param flush The flush parameters (0 == do not flush)
|
|
* @param buffer Buffer to read data from
|
|
* @return Number of bytes written, or error code
|
|
*/
|
|
virtual ResultVal<size_t> Write(u64 offset, size_t length, bool flush,
|
|
const u8* buffer) const = 0;
|
|
|
|
/**
|
|
* Get the size of the file in bytes
|
|
* @return Size of the file in bytes
|
|
*/
|
|
virtual u64 GetSize() const = 0;
|
|
|
|
/**
|
|
* Set the size of the file in bytes
|
|
* @param size New size of the file
|
|
* @return true if successful
|
|
*/
|
|
virtual bool SetSize(u64 size) const = 0;
|
|
|
|
/**
|
|
* Close the file
|
|
* @return true if the file closed correctly
|
|
*/
|
|
virtual bool Close() const = 0;
|
|
|
|
/**
|
|
* Flushes the file
|
|
*/
|
|
virtual void Flush() const = 0;
|
|
};
|
|
|
|
} // namespace FileSys
|