4.3BSD - /usr/src/usr.lib/lib2648/minmax.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)minmax.c	5.1 (Berkeley) 4/30/85";
   9: #endif not lint
  10: 
  11: /*
  12:  * minmax: find the 4 edges of the glyph within a window.
  13:  */
  14: 
  15: #include "bit.h"
  16: 
  17: minmax(g, nrow, ncol, rmin, cmin, rmax, cmax)
  18: bitmat g;
  19: int nrow, ncol;
  20: int *rmin, *cmin, *rmax, *cmax;
  21: {
  22:     register int i, j;
  23:     register int r1, r2, c1, c2;
  24:     int ar1, ar2, ac1, ac2;
  25: 
  26:     aminmax(g, nrow, ncol, &ar1, &ac1, &ar2, &ac2);
  27: #ifdef TRACE
  28:     if (trace)
  29:         fprintf(trace, "aminmax returns %d, %d, %d, %d\n", ar1, ac1, ar2, ac2);
  30: #endif
  31:     r1 = nrow; c1 = ncol; r2 = c2 = 0;
  32:     for (i=ar1; i<=ar2; i++)
  33:         for (j=ac1; j<=ac2; j++)
  34:             if (mat(g, nrow, ncol, i, j, 8)) {
  35:                 r1 = min(r1, i);
  36:                 r2 = max(r2, i);
  37:                 c1 = min(c1, j);
  38:                 c2 = max(c2, j);
  39:             }
  40:     if (r2 < r1) {
  41:         /* empty glyph! */
  42:         r1 = c1 = r2 = c2 = 1;
  43:     }
  44:     *rmin = r1; *rmax = r2;
  45:     *cmin = c1; *cmax = c2;
  46: }

Defined functions

Defined variables