lib/libc/stdlib/a64l.c

   1 /*-
   2  * Written by J.T. Conklin <jtc@netbsd.org>.
   3  * Public domain.
   4  *
   5  * $NetBSD: a64l.c,v 1.8 2000/01/22 22:19:19 mycroft Exp $
   6  * $FreeBSD: src/lib/libc/stdlib/a64l.c,v 1.2 2006/05/19 19:06:38 jkim Exp $
   7  */
   8
   9 #include <stdlib.h>
  10 #include <inttypes.h>
  11
  12 long
  13 a64l(const char *s)
  14 {
  15         long shift;
  16         int digit, i, value;
  17
  18         value = 0;
  19         shift = 0;
  20         for (i = 0; *s != '\0' && i < 6; i++, s++) {
  21                 if (*s <= '/')
  22                         digit = *s - '/' + 1;
  23                 else if (*s <= '0' + 9)
  24                         digit = *s - '0' + 2;
  25                 else if (*s <= 'A' + 25)
  26                         digit = *s - 'A' + 12;
  27                 else
  28                         digit = *s - 'a' + 38;
  29
  30                 value |= digit << shift;
  31                 shift += 6;
  32         }
  33         return (value);
  34 }