rle_put.h

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/*
 * This software is copyrighted as noted below.  It may be freely copied,
 * modified, and redistributed, provided that the copyright notice is 
 * preserved on all copies.
 * 
 * There is no warranty or other guarantee of fitness for this software,
 * it is provided solely "as is".  Bug reports or fixes may be sent
 * to the author, who may or may not act on them as he desires.
 *
 * You may not include this software in a program or other software product
 * without supplying the source, or without informing the end-user that the 
 * source is available for no extra charge.
 *
 * If you modify this software, you should include a notice giving the
 * name of the person performing the modification, the date of modification,
 * and the reason for such modification.
 */
/* 
 * rle_put.h - Definitions and a few global variables for rle_putrow/putraw.
 * 
 * Author:  Spencer W. Thomas
 *      Computer Science Dept.
 *      University of Utah
 * Date:    Mon Aug  9 1982
 * Copyright (c) 1982 Spencer W. Thomas
 * 
 * $Id: rle_put.h,v 3.0.1.2 1992/02/27 21:14:35 spencer Exp $
 */

#include "rle.h"

/* ****************************************************************
 * Dispatch table for different output types.
 */
#ifdef __cplusplus        /* Cfront 2.0  or g++ */
#ifndef c_plusplus
#define c_plusplus
#endif
extern "C" {
#endif


#ifdef c_plusplus
#define ARB_ARGS ...
#else
#define ARB_ARGS
#endif

typedef int rle_fn( ARB_ARGS );

struct rle_dispatch_tab {
    CONST_DECL char   *magic;   /* magic type flags */
    rle_fn *setup,          /* startup function */
       *skipBlankLines,
       *setColor,
       *skipPixels,
       *newScanLine,
       *putdat,         /* put a set of differing pixels */
       *putrn,          /* put a run all the same */
       *blockHook,          /* hook called at start of new */
                    /* output block */
       *putEof;     /* write EOF marker (if possible) */
};

extern struct rle_dispatch_tab rle_DTable[];

/* 
 * These definitions presume the existence of a variable called
 * "fileptr", declared "long * fileptr".  *fileptr should be
 * initialized to 0 before calling Setup().
 * A pointer "the_hdr" declared "rle_hdr * the_hdr" is also
 * presumed to exist.
 */
#define     rle_magic       (rle_DTable[(int)the_hdr->dispatch].magic)
#define     Setup()     (*rle_DTable[(int)the_hdr->dispatch].setup)(the_hdr)
#define     SkipBlankLines(n)   (*rle_DTable[(int)the_hdr->dispatch].skipBlankLines)(n, the_hdr)
#define     SetColor(c)     (*rle_DTable[(int)the_hdr->dispatch].setColor)(c, the_hdr)
#define     SkipPixels(n, l, r) (*rle_DTable[(int)the_hdr->dispatch].skipPixels)(n,l,r, the_hdr)
#define     NewScanLine(flag)   (*rle_DTable[(int)the_hdr->dispatch].newScanLine)(flag, the_hdr)
#define     putdata(buf, len)   (*rle_DTable[(int)the_hdr->dispatch].putdat)(buf, len, the_hdr)
#define     putrun(val, len, f) (*rle_DTable[(int)the_hdr->dispatch].putrn)(val,len,f, the_hdr)
#define     BlockHook()     (*rle_DTable[(int)the_hdr->dispatch].blockHook)(the_hdr)
#define     PutEof()        (*rle_DTable[(int)the_hdr->dispatch].putEof)(the_hdr)

/* 
 * States for run detection
 */
#define DATA    0
#define RUN1    1
#define RUN2    2
#define RUN3    3
#define RUN4    4
#define RUN5    5
#define RUN6    6
#define RUN7    7
#define INRUN   -1

#ifdef __cplusplus
}
#endif