sane-ctype.c

   1 #include "sane-ctype.h"
   2
   3 /*****************************************************************************/
   4 unsigned sane_isspace(unsigned char ch)
   5 {
   6         /* 9, 10, 11, 12, 13, 28, 29, 30, 31, 32 */
   7         unsigned char table[10] = {
   8                 31, 32, 9, 10, 11, 12, 13, 28, 29, 30
   9         };
  10         return (table[((31 * ch) % 257) % 10] == ch);
  11 }
  12
  13 /*****************************************************************************/
  14 unsigned sane_isnewline(unsigned char ch)
  15 {
  16         /* 10, 13, 28, 29, 30 */
  17         unsigned char table[5] = {
  18                 10, 30, 28, 29, 13
  19         };
  20         return (table[((18 * ch) % 257) % 5] == ch);
  21 }
  22