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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef BACKENDS_FS_STDIOSTREAM_H
#define BACKENDS_FS_STDIOSTREAM_H
#include "common/scummsys.h"
#include "common/noncopyable.h"
#include "common/stream.h"
#include "common/str.h"
class StdioStream : public Common::SeekableReadStream, public Common::SeekableWriteStream, public Common::NonCopyable {
public:
enum WriteMode {
WriteMode_Read = 0,
WriteMode_Write = 1,
WriteMode_WriteAtomic = 2,
};
protected:
/** File handle to the actual file. */
void *_handle;
Common::String *_path;
static StdioStream *makeFromPathHelper(const Common::String &path, WriteMode writeMode,
StdioStream *(*factory)(void *handle));
public:
/**
* Given a path, invokes fopen on that path and wrap the result in a
* StdioStream instance.
*/
static StdioStream *makeFromPath(const Common::String &path, WriteMode writeMode) {
return makeFromPathHelper(path, writeMode, [](void *handle) {
return new StdioStream(handle);
});
}
StdioStream(void *handle);
~StdioStream() override;
bool err() const override;
void clearErr() override;
bool eos() const override;
uint32 write(const void *dataPtr, uint32 dataSize) override;
bool flush() override;
int64 pos() const override;
int64 size() const override;
bool seek(int64 offs, int whence = SEEK_SET) override;
uint32 read(void *dataPtr, uint32 dataSize) override;
/**
* Configure buffered IO
*
* Must be called immediately after opening the file.
* A buffer size of 0 disables buffering.
*
* @param bufferSize the size of the Stdio read / write buffer
* @return success or failure
*/
bool setBufferSize(uint32 bufferSize);
private:
/**
* Move the file from src to dst.
* This must succeed even if the destination file already exists.
*
* This function cannot be overridden as it's called from the destructor.
*
* @param src The file to move
* @param dst The path where the file is to be moved.
*
* @returns Wether the renaming succeeded or not.
*/
bool moveFile(const Common::String &src, const Common::String &dst);
};
#endif
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