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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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef __PS2FILE_IO__
#define __PS2FILE_IO__
#include <stdio.h> // FIXME: Only for FILE -- get rid of this!
#include "common/scummsys.h"
#include "common/noncopyable.h"
#include "common/stream.h"
enum {
CACHE_SIZE = 2048 * 32,
MAX_READ_STEP = 2048 * 16,
MAX_CACHED_FILES = 6,
CACHE_READ_THRESHOLD = 16 * 2048,
CACHE_FILL_MIN = 2048 * 24,
READ_ALIGN = 64, // align all reads to the size of an EE cache line
READ_ALIGN_MASK = READ_ALIGN - 1
};
// TODO: Make this a subclass of SeekableReadStream & WriteStream
// See also StdioStream.
class Ps2File {
public:
Ps2File();
virtual ~Ps2File();
virtual bool open(const char *name, int mode);
virtual uint32 read(void *dest, uint32 len);
virtual uint32 write(const void *src, uint32 len);
virtual int32 tell();
virtual int32 size();
virtual int seek(int32 offset, int origin);
virtual bool eof();
virtual bool getErr();
virtual void setErr(bool);
private:
void cacheReadAhead();
void cacheReadSync();
int _fd;
uint32 _mode;
uint32 _fileSize;
uint32 _filePos;
uint32 _cacheSize;
uint32 _cachePos;
uint8 *_cache;
bool _eof;
bool _err;
int _sema;
uint8 *_cacheBuf;
bool _cacheOpRunning;
uint32 _physFilePos;
uint32 _bytesInCache, _cacheOfs;
uint32 _readBytesBlock;
bool _stream;
};
// TODO: Merge Ps2File into PS2FileStream
class PS2FileStream : public Common::SeekableReadStream, public Common::WriteStream, public Common::NonCopyable {
protected:
/** File handle to the actual file. */
Ps2File *_handle;
public:
/**
* Given a path, invokes fopen on that path and wrap the result in a
* PS2FileStream instance.
*/
static PS2FileStream *makeFromPath(const Common::String &path, bool writeMode);
PS2FileStream(Ps2File *handle);
virtual ~PS2FileStream();
virtual bool err() const;
virtual void clearErr();
virtual bool eos() const;
virtual uint32 write(const void *dataPtr, uint32 dataSize);
virtual bool flush();
virtual int32 pos() const;
virtual int32 size() const;
virtual bool seek(int32 offs, int whence = SEEK_SET);
virtual uint32 read(void *dataPtr, uint32 dataSize);
};
// TODO: Get rid of the following, instead use PS2FileStream directly.
FILE *ps2_fopen(const char *fname, const char *mode);
int ps2_fclose(FILE *stream);
int ps2_fflush(FILE *stream);
size_t ps2_fread(void *buf, size_t r, size_t n, FILE *stream);
size_t ps2_fwrite(const void *buf, size_t r, size_t n, FILE *stream);
int ps2_fputs(const char *s, FILE *stream);
#endif // __PS2FILE_IO__
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