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128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef __PS2FILE_IO__
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#define __PS2FILE_IO__
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#include <stdio.h> // FIXME: Only for FILE -- get rid of this!
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#include "common/scummsys.h"
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#include "common/noncopyable.h"
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#include "common/stream.h"
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enum {
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CACHE_SIZE = 2048 * 32,
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MAX_READ_STEP = 2048 * 16,
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MAX_CACHED_FILES = 6,
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CACHE_READ_THRESHOLD = 16 * 2048,
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CACHE_FILL_MIN = 2048 * 24,
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READ_ALIGN = 64, // align all reads to the size of an EE cache line
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READ_ALIGN_MASK = READ_ALIGN - 1
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};
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// TODO: Make this a subclass of SeekableReadStream & WriteStream
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// See also StdioStream.
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class Ps2File {
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public:
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Ps2File();
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virtual ~Ps2File();
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virtual bool open(const char *name, int mode);
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virtual uint32 read(void *dest, uint32 len);
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virtual uint32 write(const void *src, uint32 len);
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virtual int32 tell();
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virtual int32 size();
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virtual int seek(int32 offset, int origin);
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virtual bool eof();
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virtual bool getErr();
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virtual void setErr(bool);
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private:
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void cacheReadAhead();
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void cacheReadSync();
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int _fd;
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uint32 _mode;
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uint32 _fileSize;
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uint32 _filePos;
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uint32 _cacheSize;
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uint32 _cachePos;
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uint8 *_cache;
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bool _eof;
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bool _err;
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int _sema;
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uint8 *_cacheBuf;
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bool _cacheOpRunning;
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uint32 _physFilePos;
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uint32 _bytesInCache, _cacheOfs;
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uint32 _readBytesBlock;
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bool _stream;
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};
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// TODO: Merge Ps2File into PS2FileStream
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class PS2FileStream : public Common::SeekableReadStream, public Common::WriteStream, public Common::NonCopyable {
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protected:
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/** File handle to the actual file. */
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Ps2File *_handle;
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public:
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/**
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* Given a path, invokes fopen on that path and wrap the result in a
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* PS2FileStream instance.
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*/
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static PS2FileStream *makeFromPath(const Common::String &path, bool writeMode);
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PS2FileStream(Ps2File *handle);
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virtual ~PS2FileStream();
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virtual bool err() const;
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virtual void clearErr();
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virtual bool eos() const;
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virtual uint32 write(const void *dataPtr, uint32 dataSize);
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virtual bool flush();
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virtual int32 pos() const;
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virtual int32 size() const;
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virtual bool seek(int32 offs, int whence = SEEK_SET);
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virtual uint32 read(void *dataPtr, uint32 dataSize);
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};
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// TODO: Get rid of the following, instead use PS2FileStream directly.
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FILE *ps2_fopen(const char *fname, const char *mode);
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int ps2_fclose(FILE *stream);
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int ps2_fflush(FILE *stream);
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size_t ps2_fread(void *buf, size_t r, size_t n, FILE *stream);
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size_t ps2_fwrite(const void *buf, size_t r, size_t n, FILE *stream);
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int ps2_fputs(const char *s, FILE *stream);
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#endif // __PS2FILE_IO__
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