1/*	$NetBSD$	*/
2
3#include <tommath.h>
4#ifdef BN_MP_GET_INT_C
5/* LibTomMath, multiple-precision integer library -- Tom St Denis
6 *
7 * LibTomMath is a library that provides multiple-precision
8 * integer arithmetic as well as number theoretic functionality.
9 *
10 * The library was designed directly after the MPI library by
11 * Michael Fromberger but has been written from scratch with
12 * additional optimizations in place.
13 *
14 * The library is free for all purposes without any express
15 * guarantee it works.
16 *
17 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
18 */
19
20/* get the lower 32-bits of an mp_int */
21unsigned long mp_get_int(mp_int * a)
22{
23  int i;
24  unsigned long res;
25
26  if (a->used == 0) {
27     return 0;
28  }
29
30  /* get number of digits of the lsb we have to read */
31  i = MIN(a->used,(int)((sizeof(unsigned long)*CHAR_BIT+DIGIT_BIT-1)/DIGIT_BIT))-1;
32
33  /* get most significant digit of result */
34  res = DIGIT(a,i);
35
36  while (--i >= 0) {
37    res = (res << DIGIT_BIT) | DIGIT(a,i);
38  }
39
40  /* force result to 32-bits always so it is consistent on non 32-bit platforms */
41  return res & 0xFFFFFFFFUL;
42}
43#endif
44
45/* Source: /cvs/libtom/libtommath/bn_mp_get_int.c,v */
46/* Revision: 1.4 */
47/* Date: 2006/12/28 01:25:13 */
48