104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
#include "macunpack.h"
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#ifdef SIT
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#include <stdint.h>
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#ifdef SIT_INTERNAL
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#define S_SIGNATURE 0
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#define S_NUMFILES 4
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#define S_ARCLENGTH 6
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#define S_SIGNATURE2 10
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#define S_VERSION 14
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#define SITHDRSIZE 22
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#define F_COMPRMETHOD 0
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#define F_COMPDMETHOD 1
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#define F_FNAME 2
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#define F_FTYPE 66
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#define F_CREATOR 70
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#define F_FNDRFLAGS 74
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#define F_CREATIONDATE 76
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#define F_MODDATE 80
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#define F_RSRCLENGTH 84
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#define F_DATALENGTH 88
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#define F_COMPRLENGTH 92
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#define F_COMPDLENGTH 96
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#define F_RSRCCRC 100
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#define F_DATACRC 102
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#define F_HDRCRC 110
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#define FILEHDRSIZE 112
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typedef int32_t OSType;
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typedef struct sitHdr { /* 22 bytes */
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OSType signature; /* = 'SIT!' -- for verification */
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unsigned short numFiles; /* number of files in archive */
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uint32_t arcLength; /* length of entire archive incl.
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hdr. -- for verification */
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OSType signature2; /* = 'rLau' -- for verification */
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unsigned char version; /* version number */
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char reserved[7];
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} sitHdr;
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typedef struct sit_fileHdr { /* 112 bytes */
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unsigned char compRMethod; /* rsrc fork compression method */
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unsigned char compDMethod; /* data fork compression method */
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unsigned char fName[64]; /* a STR63 */
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OSType fType; /* file type */
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OSType fCreator; /* er... */
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unsigned short FndrFlags; /* copy of Finder flags. For our
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purposes, we can clear:
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busy,onDesk */
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uint32_t creationDate;
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uint32_t modDate; /* !restored-compat w/backup prgms */
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uint32_t rsrcLength; /* decompressed lengths */
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uint32_t dataLength;
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uint32_t compRLength; /* compressed lengths */
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uint32_t compDLength;
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unsigned short rsrcCRC; /* crc of rsrc fork */
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unsigned short dataCRC; /* crc of data fork */
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char reserved[6];
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unsigned short hdrCRC; /* crc of file header */
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} sit_fileHdr;
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/* file format is:
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sitArchiveHdr
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file1Hdr
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file1RsrcFork
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file1DataFork
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file2Hdr
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file2RsrcFork
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file2DataFork
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.
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.
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.
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fileNHdr
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fileNRsrcFork
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fileNDataFork
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*/
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/* compression methods */
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#define nocomp 0 /* just read each byte and write it to archive */
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#define rle 1 /* RLE compression */
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#define lzc 2 /* LZC compression */
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#define huffman 3 /* Huffman compression */
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#define lzah 5 /* LZ with adaptive Huffman */
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#define fixhuf 6 /* Fixed Huffman table */
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#define mw 8 /* Miller-Wegman encoding */
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/* this bit says whether the file is protected or not */
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#define prot 16 /* password protected bit */
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/* rsrc & data compress are identical here: */
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#define sfolder 32 /* start of folder */
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#define efolder 33 /* end of folder */
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#define sknown 0x16f /* known compression methods */
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/* all other numbers are reserved */
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#define ESC 0x90 /* repeat packing escape */
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#endif
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void sit (void);
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#endif |