BSD 4_3_Tahoe release

[unix-history] / usr / src / new / X / xdvi / mktable.c

#ifndef lint
static char sccsid[] = "@(#)mktable.c   1.2 (Berkeley) 1/24/88";
#endif /* not lint */

#ifndef lint
static char *mktable_c = "$Header: mktable.c,v 10.5 86/02/01 15:44:59 tony Rel $";
#endif  lint

#include <stdio.h>

char reverse_byte[0x100] = { 0 };

main()
{
       seed_table();
       fill_in_table();
       print_table();
       exit(0);
}

seed_table()
{
       int i = 0;
       int j = 0x100/2;
       int b = 0;

       for (;;) {
               reverse_byte[i] = b;
               if (j == 0)
                       break;
               i = 2*i + 1;
               b = b + j;
               j = j/2;
       }
}

fill_in_table()
{
       int b;

       for (b = 1; b < 0x100-2; b += 1)
               reverse_byte[b+1] =
                       reverse_byte[b] ^ reverse_byte[b^(b+1)];
}

print_table()
{
       int b;

       printf("char reverse_byte[0x100] = {\n\t");
       b = 0;
       for (;;) {
               printf("0x%02x", reverse_byte[b] & 0xff);
               b += 1;
               if (b == 0x100) {
                       printf("\n};\n");
                       return;
               } else if (b % 8 == 0) {
                       printf(",\n\t");
               } else {
                       printf(", ");
               }
       }
}