/usr/include/astrotcl/gzip.h is in skycat 3.1.2+starlink1~b-3.
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************************************************************************
**** C A N A D I A N A S T R O N O M Y D A T A C E N T R E *****
*
* Include File Name: press/h/gzip.h
*
* Purpose:
* Common declarations for all gzip modules
* Copyright (C) 1992-1993 Jean-loup Gailly.
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License, see the file
* COPYING.
*
* Date : June 22, 1993
*
* SCCS data : @(#)
* Module Name : gzip.h
* Version Number : 1.2
* Release Number : 1
* Last Updated : 07/04/97
*
* Programmer : Norman Hill
*
* Modification History:
* 97/07/02 SEC : Added function prototype for flush_window().
* 98/10/16 ESO : Allan Brighton: changed global names to avoid clash
* with cfitsio and tclpro, which also use gzip sources.
* Changed "window" to "swindow", "prev" to "sprev".
*
**** C A N A D I A N A S T R O N O M Y D A T A C E N T R E *****
************************************************************************
-*/
#ifdef __STDC__
typedef void *voidp;
#else
typedef char *voidp;
#endif
# define memzero(s, n) memset ((voidp)(s), 0, (n))
/*
* Compression methods (see algorithm.doc)
*/
#define DEFLATED 8
#define MAX_METHODS 9
#define DIST_BUFSIZE 0x8000 /* buffer for distances, see trees.c */
/* allan: 15-03-99: added "extern" to avoid linker warning */
extern unsigned short *dbuf; /* buffer for distances, see trees.c */
extern unsigned char *swindow; /* Sliding window and suffix table (unlzw) */
#define tab_suffix swindow
#define tab_prefix sprev /* hash link (see deflate.c) */
#define head (sprev+WSIZE) /* hash head (see deflate.c) */
extern unsigned short *tab_prefix; /* prefix code (see unlzw.c) */
extern unsigned insize; /* valid bytes in inbuf */
extern unsigned inptr; /* index of next byte to be processed in inbuf */
extern unsigned outcnt; /* bytes in output buffer */
extern long bytes_in; /* number of input bytes */
extern long bytes_out; /* number of output bytes */
extern long header_bytes;/* number of bytes in gzip header */
#define isize bytes_in
/* for compatibility with old zip sources (to be cleaned) */
extern long time_stamp; /* original time stamp (modification time) */
extern long ifile_size; /* input file size, -1 for devices (debug only) */
typedef int file_t; /* Do not use stdio */
#define NO_FILE (-1) /* in memory compression */
#define GZIP_MAGIC "\037\213" /* Magic header for gzip files, 1F 8B */
/*
* gzip flag byte
*/
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
#define COMMENT 0x10 /* bit 4 set: file comment present */
#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
#define RESERVED 0xC0 /* bit 6,7: reserved */
/* internal file attribute */
#define UNKNOWN 0xffff
#define BINARY 0
#define ASCII 1
#ifndef WSIZE
# define WSIZE 0x8000 /* window size--must be a power of two, and */
#endif /* at least 32K for zip's deflate method */
#define MIN_MATCH 3
#define MAX_MATCH 258
/* The minimum and maximum match lengths */
#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
/* Minimum amount of lookahead, except at the end of the input file.
* See deflate.c for comments about the MIN_MATCH+1.
*/
#define MAX_DIST (WSIZE-MIN_LOOKAHEAD)
/* In order to simplify the code, particularly on 16 bit machines, match
* distances are limited to MAX_DIST instead of WSIZE.
*/
extern int decrypt; /* flag to turn on decryption */
extern int exit_code; /* program exit code */
extern int verbose; /* be verbose (-v) */
extern int quiet; /* be quiet (-q) */
extern int level; /* compression level */
extern int test; /* check .z file integrity */
extern int to_stdout; /* output to stdout (-c) */
extern int save_orig_name; /* set if original name must be saved */
extern pfi char_in; /* Function to read bytes. */
extern pfi char_out; /* function to write bytes. */
/* put_byte is used for the compressed output, put_ubyte for the
* uncompressed output. However unlzw() uses window for its
* suffix table instead of its output buffer, so it does not use put_ubyte
* (to be cleaned up).
*/
/* Output a 16 bit value, lsb first */
#define seekable() 0 /* force sequential output */
#define translate_eol 0 /* no option -a yet */
#define tolow(c) (isupper(c) ? (c)-'A'+'a' : (c)) /* force to lower case */
/* Macros for getting two-byte and four-byte header values */
#define SH(p) ((unsigned short)(byte)((p)[0]) | \
((unsigned short)(byte)((p)[1]) << 8))
#define LG(p) ((unsigned long)(SH(p)) | ((unsigned long)(SH((p)+2)) << 16))
#ifdef XXXDEBUG
# define Tracevv(x) {if (verbose>1) fprintf x ;}
# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
#else
# define Tracevv(x)
# define Tracecv(c,x)
#endif
/*
* Function prototypes.
*/
extern int flush_window( void );
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