1/* see LICENSE file for copyright and license details */
 2#include "../util.h"
 3
 4int
 5hexval(int c)
 6{
 7  if ('0' <= c && c <= '9')
 8    return c - '0';
 9  if ('a' <= c && c <= 'f')
10    return c - 'a' + 10;
11  if ('A' <= c && c <= 'F')
12    return c - 'A' + 10;
13  return -1;
14}