diff options
Diffstat (limited to 'engines/cge/fileio.h')
| -rw-r--r-- | engines/cge/fileio.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/engines/cge/fileio.h b/engines/cge/fileio.h new file mode 100644 index 0000000000..a8577207bd --- /dev/null +++ b/engines/cge/fileio.h @@ -0,0 +1,180 @@ +/* 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. + * + */ + +/* + * This code is based on original Soltys source code + * Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon + */ + +#ifndef __CGE_BTFILE__ +#define __CGE_BTFILE__ + +#include "cge/general.h" +#include "common/stream.h" + +namespace CGE { + +#define kBtSize 1024 +#define kBtKeySize 13 +#define kBtLevel 2 +#define kBtInnerCount ((kBtSize - 4 /*sizeof(Hea) */) / (kBtKeySize + 2 /*sizeof(Inner) */)) +#define kBtLeafCount ((kBtSize - 4 /*sizeof(Hea) */) / (kBtKeySize + 4 + 2 /*sizeof(BtKeypack) */)) +#define kBtValNone 0xFFFF +#define kBtValRoot 0 +#define kLineMaxSize 512 +#define kBufferSize 2048 +#define kCatName "VOL.CAT" +#define kDatName "VOL.DAT" + +struct BtKeypack { + char _key[kBtKeySize]; + uint32 _mark; + uint16 _size; +}; + +struct Inner { + uint8 _key[kBtKeySize]; + uint16 _down; +}; + +struct Hea { + uint16 _count; + uint16 _down; +}; + +class XFile { +public: + uint16 _error; + + XFile() : _error(0) { } + virtual ~XFile() { } + virtual uint16 read(void *buf, uint16 len) = 0; + virtual long mark() = 0; + virtual long size() = 0; + virtual long seek(long pos) = 0; +}; + +class IoHand : public XFile { +protected: + Common::File *_file; + uint16 _seed; + Crypt *_crypt; +public: + IoHand(const char *name, Crypt crypt); + IoHand(Crypt *crypt); + virtual ~IoHand(); + static bool exist(const char *name); + uint16 read(void *buf, uint16 len); + long mark(); + long size(); + long seek(long pos); +}; + +class IoBuf : public IoHand { +protected: + uint8 *_buff; + uint16 _ptr; + uint16 _lim; + long _bufMark; + virtual void readBuf(); +public: + IoBuf(Crypt *crpt); + IoBuf(const char *name, Crypt *crpt); + virtual ~IoBuf(); + uint16 read(void *buf, uint16 len); + uint16 read(uint8 *buf); + int read(); +}; + + +class CFile : public IoBuf { +public: + static uint16 _maxLineLen; + CFile(const char *name, Crypt *crpt); + virtual ~CFile(); + long mark(); + long seek(long pos); +}; + +struct BtPage { + Hea _hea; + union { + // dummy filler to make proper size of union + uint8 _data[kBtSize - 4 /*sizeof(Hea) */]; + // inner version of data: key + word-sized page link + Inner _inn[kBtInnerCount]; + // leaf version of data: key + all user data + BtKeypack _lea[kBtLeafCount]; + }; + + void read(Common::ReadStream &s); +}; + +class BtFile : public IoHand { + struct { + BtPage *_page; + uint16 _pgNo; + int _indx; + } _buff[kBtLevel]; + + BtPage *getPage(int lev, uint16 pgn); +public: + BtFile(const char *name, Crypt *crpt); + virtual ~BtFile(); + BtKeypack *find(const char *key); + BtKeypack *next(); +}; + +class Dat { + friend class VFile; + CFile _file; +public: + Dat(); + bool read(long org, uint16 len, uint8 *buf); +}; + +class VFile : public IoBuf { +private: + static Dat *_dat; + static BtFile *_cat; + static VFile *_recent; + + long _begMark; + long _endMark; + + void readBuf(); +public: + VFile(const char *name); + ~VFile(); + + static void init(); + static void deinit(); + static bool exist(const char *name); + static const char *next(); + long mark(); + long size(); + long seek(long pos); +}; + +} // End of namespace CGE + +#endif |