/home/ntakagi/work/tcl8.5.1/libtommath/bn_mp_shrink.c Source File

00001 #include <tommath.h>
00002 #ifdef BN_MP_SHRINK_C
00003 /* LibTomMath, multiple-precision integer library -- Tom St Denis
00004  *
00005  * LibTomMath is a library that provides multiple-precision
00006  * integer arithmetic as well as number theoretic functionality.
00007  *
00008  * The library was designed directly after the MPI library by
00009  * Michael Fromberger but has been written from scratch with
00010  * additional optimizations in place.
00011  *
00012  * The library is free for all purposes without any express
00013  * guarantee it works.
00014  *
00015  * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
00016  */
00017 
00018 /* shrink a bignum */
00019 int mp_shrink (mp_int * a)
00020 {
00021   mp_digit *tmp;
00022   if (a->alloc != a->used && a->used > 0) {
00023     if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * a->used)) == NULL) {
00024       return MP_MEM;
00025     }
00026     a->dp    = tmp;
00027     a->alloc = a->used;
00028   }
00029   return MP_OKAY;
00030 }
00031 #endif
00032 
00033 /* $Source: /cvsroot/tcl/libtommath/bn_mp_shrink.c,v $ */
00034 /* $Revision: 1.1.1.3 $ */
00035 /* $Date: 2006/12/01 00:08:11 $ */