lib/libc/stdlib/a64l.c

   1 /*
   2  * Written by J.T. Conklin <jtc@NetBSD.org>.
   3  * Public domain.
   4  */
   5
   6 #include <sys/cdefs.h>
   7 #if defined(LIBC_SCCS) && !defined(lint)
   8 __RCSID("$NetBSD: a64l.c,v 1.9 2003/07/26 19:24:53 salo Exp $");
   9 #endif
  10
  11 #include "namespace.h"
  12
  13 #include <assert.h>
  14 #include <stdlib.h>
  15
  16 #ifdef __weak_alias
  17 __weak_alias(a64l,_a64l)
  18 #endif
  19
  20 long
  21 a64l(s)
  22         const char *s;
  23 {
  24         long value, digit, shift;
  25         int i;
  26
  27         _DIAGASSERT(s != NULL);
  28
  29         value = 0;
  30         shift = 0;
  31         for (i = 0; *s && i < 6; i++, s++) {
  32                 if (*s <= '/')
  33                         digit = *s - '.';
  34                 else if (*s <= '9')
  35                         digit = *s - '0' + 2;
  36                 else if (*s <= 'Z')
  37                         digit = *s - 'A' + 12;
  38                 else
  39                         digit = *s - 'a' + 38;
  40
  41                 value |= digit << shift;
  42                 shift += 6;
  43         }
  44
  45         return (long) value;
  46 }