text: /* $Id: mkspans.c,v 1.11 2015/02/19 22:39:58 drolon Exp $ */
  
  /*
   * Copyright (c) 1991-1997 Sam Leffler
   * Copyright (c) 1991-1997 Silicon Graphics, Inc.
   *
   * Permission to use, copy, modify, distribute, and sell this software and 
   * its documentation for any purpose is hereby granted without fee, provided
   * that (i) the above copyright notices and this permission notice appear in
   * all copies of the software and related documentation, and (ii) the names of
   * Sam Leffler and Silicon Graphics may not be used in any advertising or
   * publicity relating to the software without the specific, prior written
   * permission of Sam Leffler and Silicon Graphics.
   * 
   * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
   * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
   * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
   * 
   * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
   * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
   * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
   * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
   * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
   * OF THIS SOFTWARE.
   */
  
  #include <string.h>
  #include <stdio.h>
  
  /*
   * Hack program to construct tables used to find
   * runs of zeros and ones in Group 3 Fax encoding.
   */
  
  dumparray(name, runs)
  	char *name;
  	unsigned char runs[256];
  {
  	int i;
  	char *sep;
  	printf("static unsigned char %s[256] = {\n", name);
  	sep = "    ";
  	for (i = 0; i < 256; i++) {
  		printf("%s%d", sep, runs[i]);
  		if (((i + 1) % 16) == 0) {
  			printf(",	/* 0x%02x - 0x%02x */\n", i-15, i);
  			sep = "    ";
  		} else
  			sep = ", ";
  	}
  	printf("\n};\n");
  }
  
  main()
  {
  	unsigned char runs[2][256];
  
  	memset(runs[0], 0, 256*sizeof (char));
  	memset(runs[1], 0, 256*sizeof (char));
  	{ register int run, runlen, i;
  	  runlen = 1;
  	  for (run = 0x80; run != 0xff; run = (run>>1)|0x80) {
  		for (i = run-1; i >= 0; i--) {
  			runs[1][run|i] = runlen;
  			runs[0][(~(run|i)) & 0xff] = runlen;
  		}
  		runlen++;
  	  }
  	  runs[1][0xff] = runs[0][0] = 8;
  	}
  	dumparray("bruns", runs[0]);
  	dumparray("wruns", runs[1]);
  }
  
  /* vim: set ts=8 sts=8 sw=8 noet: */
  /*
   * Local Variables:
   * mode: c
   * c-basic-offset: 8
   * fill-column: 78
   * End:
   */
  