g3g4.h

MH解码

/*	$Id: g3g4.h 1.2 90/06/09 18:21:50 marking Exp $
 *
 NAME
 *	g3g4.h -- definitions for decoding group 3 and group 4 images
 *
 USED WITH
 *	builddec.c -- build decode tables
 *	group 3 and group 4 encoding and decoding routines
 *
 DESCRIPTION
 *	Common definitions for group 3 and group 4 utilities.
 *
 LEGAL
 *	Copyright 1989, 1990 Michael P. Marking, Post Office Box 8039,
 *	Scottsdale, Arizona 85252-8039. All rights reserved.
 *
 *	License is granted by the copyright holder to distribute and use this
 *	code without payment of royalties or the necessity of notification as
 *	long as this notice (all the text under "LEGAL") is included.
 *
 *	Reference: $Id: g3g4.h 1.2 90/06/09 18:21:50 marking Exp $
 *
 *	This program is offered without any warranty of any kind. It includes
 *	no warranty of merchantability or fitness for any purpose. Testing and
 *	suitability for any use are the sole responsibility of the user.
 *
 PORTABILITY
 *
 *	There is a non-portable use of "global" variables in this file,
 *	about which a minority of compilers will justifiably complain. Certain
 *	variables are declared here without extern keywords. Strictly
 *	speaking, they should be declared extern in all but one module, but
 *	that would require complication of this file. If it gets past your
 *	compiler and linker, you can probably ignore it.
 * 
 HISTORY
 *	$Log:	g3g4.h $
 * Revision 1.2  90/06/09  18:21:50  marking
 * clean up comments for release
 * 
 * Revision 1.1  89/06/30  17:00:00  marking
 * Initial revision
 * 
 *
 INFORMATION
 *	Although there is no support offered with this program, the author will
 *	endeavor to correct errors. Updates will also be made available from
 *	time to time.
 *
 *	Contact: Michael P. Marking, Post Office Box 8039, Scottsdale, Arizona
 *	85252-8039 USA. Replies are not guaranteed to be swift. Beginning
 *	July 1990, e-mail may be sent to uunet!ipel!marking.
 *
 *	Also beginning in July 1990, this code will be archived at the
 *	ipel!phoenix BBS in file g3g4.zoo. The 24-hour telephone number
 *	for 300/1200/2400 is [phone]. When logging in, specify user
 *	"public", system "bbs", and password "public".
 *
 *	This code is also available from the C Users Group in volume 317.
 */

#define WHITE 0
#define BLACK 1
#define EOL_CODE -1
#define INVALID_CODE -2


char (*p_decode_black)(short);
char (*p_decode_new_row)(void);
short(*p_decode_next_byte)(void);
char (*p_decode_white)(short);