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

00001 #include <tommath.h>
00002 #ifdef BN_MP_OR_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 /* OR two ints together */
00019 int mp_or (mp_int * a, mp_int * b, mp_int * c)
00020 {
00021   int     res, ix, px;
00022   mp_int  t, *x;
00023 
00024   if (a->used > b->used) {
00025     if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
00026       return res;
00027     }
00028     px = b->used;
00029     x = b;
00030   } else {
00031     if ((res = mp_init_copy (&t, b)) != MP_OKAY) {
00032       return res;
00033     }
00034     px = a->used;
00035     x = a;
00036   }
00037 
00038   for (ix = 0; ix < px; ix++) {
00039     t.dp[ix] |= x->dp[ix];
00040   }
00041   mp_clamp (&t);
00042   mp_exch (c, &t);
00043   mp_clear (&t);
00044   return MP_OKAY;
00045 }
00046 #endif
00047 
00048 /* $Source: /cvsroot/tcl/libtommath/bn_mp_or.c,v $ */
00049 /* $Revision: 1.1.1.3 $ */
00050 /* $Date: 2006/12/01 00:08:11 $ */