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Diffstat (limited to 'common/unarj.h')
| -rw-r--r-- | common/unarj.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/common/unarj.h b/common/unarj.h new file mode 100644 index 0000000000..b015999671 --- /dev/null +++ b/common/unarj.h @@ -0,0 +1,185 @@ +/* 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 COMMON_UNARJ_H +#define COMMON_UNARJ_H + +#include "common/file.h" +#include "common/hash-str.h" + +namespace Common { + +#define HEADER_ID 0xEA60 +#define HEADER_ID_HI 0xEA +#define HEADER_ID_LO 0x60 +#define FIRST_HDR_SIZE 30 +#define FIRST_HDR_SIZE_V 34 +#define COMMENT_MAX 2048 +#define FNAME_MAX 512 +#define HEADERSIZE_MAX (FIRST_HDR_SIZE + 10 + FNAME_MAX + COMMENT_MAX) +#define CRC_MASK 0xFFFFFFFFL +#define MAXSFX 25000L + +#define CODE_BIT 16 +#define CHAR_BIT 8 +#define ARJ_UCHAR_MAX 255 // UCHAR_MAX is defined in limits.h in MSVC +#define THRESHOLD 3 +#define DDICSIZ 26624 +#define MAXDICBIT 16 +#define MATCHBIT 8 +#define MAXMATCH 256 +#define NC (ARJ_UCHAR_MAX + MAXMATCH + 2 - THRESHOLD) +#define NP (MAXDICBIT + 1) +#define CBIT 9 +#define NT (CODE_BIT + 3) +#define PBIT 5 +#define TBIT 5 + +#if NT > NP +#define NPT NT +#else +#define NPT NP +#endif + +#define CTABLESIZE 4096 +#define PTABLESIZE 256 + +#define STRTP 9 +#define STOPP 13 + +#define STRTL 0 +#define STOPL 7 + +struct ArjHeader { + int32 pos; + uint16 id; + uint16 headerSize; + // + byte firstHdrSize; + byte nbr; + byte xNbr; + byte hostOs; + byte flags; + byte method; + byte fileType; + byte pad; + uint32 timeStamp; + int32 compSize; + int32 origSize; + uint32 fileCRC; + uint16 entryPos; + uint16 fileMode; + uint16 hostData; + char filename[FNAME_MAX]; + char comment[COMMENT_MAX]; + uint16 extHeaderSize; + + uint32 headerCrc; +}; + +typedef HashMap<String, int, IgnoreCase_Hash, IgnoreCase_EqualTo> ArjFilesMap; + +class ArjFile : public File { +public: + ArjFile(); + ~ArjFile(); + + void enableFallback(bool val) { _fallBack = val; } + + void registerArchive(const String &filename); + + bool open(const Common::String &filename, AccessMode mode = kFileReadMode); + void close(); + + uint32 read(void *dataPtr, uint32 dataSize); + bool eos(); + uint32 pos(); + uint32 size(); + void seek(int32 offset, int whence = SEEK_SET); + bool isOpen() { return _isOpen; } + +private: + bool _fallBack; + + File _currArchive; + Array<ArjHeader *> _headers; + ArjFilesMap _fileMap; + StringMap _archMap; + ReadStream *_stream; + byte *_uncompressedData; + byte *_compressedData; + MemoryWriteStream *_outstream; + MemoryReadStream *_compressed; + SeekableReadStream *_uncompressed; + + bool _isOpen; + + int32 findHeader(void); + ArjHeader *readHeader(); + + void decode(); + void decode_f(); + + uint16 _bitbuf; + int32 _compsize; + int32 _origsize; + byte _subbitbuf; + int _bitcount; + + void init_getbits(); + void fillbuf(int n); + uint16 getbits(int n); + + + void make_table(int nchar, byte *bitlen, int tablebits, uint16 *table, int tablesize); + void read_pt_len(int nn, int nbit, int i_special); + void read_c_len(void); + uint16 decode_c(void); + uint16 decode_p(void); + void decode_start(void); + int16 decode_ptr(void); + int16 decode_len(void); + +private: + byte _text[DDICSIZ]; + + int16 _getlen; + int16 _getbuf; + + uint16 _left[2 * NC - 1]; + uint16 _right[2 * NC - 1]; + byte _c_len[NC]; + byte _pt_len[NPT]; + + uint16 _c_table[CTABLESIZE]; + uint16 _pt_table[PTABLESIZE]; + uint16 _blocksize; + + +}; + +} // End of namespace Common + +#endif |