/usr/include/astrotcl/ux_press.h is in skycat 3.1.2+starlink1~b-8+b2.
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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/ux_press.h
*
* Purpose:
* Private header for the unix compress routines.
*
* Date : Feb 23, 1993
*
* SCCS data : @(#)
* Module Name : ux_press.h
* Version Number : 1.1
* Release Number : 1
* Last Updated : 03/01/93
*
* Programmer : Norman Hill
*
* Modification History:
*
**** 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 <gen_msg.h>
typedef int code_int;
typedef long int count_int;
/*
* Define the bits for the third byte in the header.
*/
#define BLOCK_MASK 0x80
#define BIT_MASK 0x1f
#define CHECK_GAP 50000
/*
* the next two codes should not be changed lightly, as they must not
* lie within the contiguous general code space.
*/
#define FIRST 257 /* first free entry */
#define CLEAR 256 /* table clear output code */
#define BITS 16 /* Maximum number of bits. */
#define INIT_BITS 9 /* Initial number of bits/code. */
#define HSIZE 69001 /* Hash table size. */
#define htabof(i) htab[i]
#define codetabof(i) codetab[i]
/*
* To save much memory, we overlay the table used by compress() with those
* used by decompress(). The tab_prefix table is the same size and type
* as the codetab. The tab_suffix table needs 2**BITS characters. We
* get this from the beginning of htab. The output stack uses the rest
* of htab, and contains characters. There is plenty of room for any
* possible stack (stack used to be 8000 characters).
*/
#define tab_prefixof(i) codetabof(i)
#define tab_suffixof(i) ((byte *)(htab))[i]
#define de_stack ((byte *)&tab_suffixof(1<<BITS))
#define MAXCODE(n_bits) ((1 << (n_bits)) - 1)
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