```   1: /*
2:  * Copyright (c) 1980 Regents of the University of California.
4:  * specifies the terms and conditions for redistribution.
5:  */
6:
7: #ifndef lint
8: static char sccsid[] = "@(#)aminmax.c	5.1 (Berkeley) 4/26/85";
9: #endif not lint
10:
11: /*
12:  * aminmax: find the 4 edges of the glyph within a window.
13:  * This version is approximate, in that it may include some
14:  * blank areas.  But it's much faster because it doesn't have
15:  * to call mat over and over.
16:  */
17:
18: #include "bit.h"
19:
20: aminmax(g, nrow, ncol, rmin, cmin, rmax, cmax)
21: bitmat g;
22: int nrow, ncol;
23: int *rmin, *cmin, *rmax, *cmax;
24: {
25:     register int i, j;
26:     register int nc = (ncol+7)>>3;
27:     register int r1, r2, c1, c2;
28:
29:     r1 = nrow; c1 = nc; r2 = c2 = 0;
30:     for (i=0; i<nrow; i++)
31:         for (j=0; j<nc; j++)
32:             if (g[i*nc+j]) {
33:                 r1 = min(r1, i);
34:                 r2 = max(r2, i);
35:                 c1 = min(c1, j);
36:                 c2 = max(c2, j);
37:             }
38:     if (r2 < r1) {
39:         /* empty glyph! */
40:         r1 = c1 = r2 = c2 = 1;
41:     }
42:     *rmin = r1; *rmax = r2;
43:     *cmin = 8*c1; *cmax = 8*c2+7;
44: }
```

#### Defined functions

aminmax defined in line 20; used 3 times

#### Defined variables

sccsid defined in line 8; never used
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