Mercurial > dropbear
view libtommath/bn_mp_reduce_2k_setup.c @ 1276:9169e4e7cbee
fix empty C prototypes
author | Francois Perrad <francois.perrad@gadz.org> |
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date | Fri, 01 Jan 2016 16:30:31 +0100 |
parents | 5ff8218bcee9 |
children | 60fc6476e044 |
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#include <tommath.h> #ifdef BN_MP_REDUCE_2K_SETUP_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision * integer arithmetic as well as number theoretic functionality. * * The library was designed directly after the MPI library by * Michael Fromberger but has been written from scratch with * additional optimizations in place. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://math.libtomcrypt.com */ /* determines the setup value */ int mp_reduce_2k_setup(mp_int *a, mp_digit *d) { int res, p; mp_int tmp; if ((res = mp_init(&tmp)) != MP_OKAY) { return res; } p = mp_count_bits(a); if ((res = mp_2expt(&tmp, p)) != MP_OKAY) { mp_clear(&tmp); return res; } if ((res = s_mp_sub(&tmp, a, &tmp)) != MP_OKAY) { mp_clear(&tmp); return res; } *d = tmp.dp[0]; mp_clear(&tmp); return MP_OKAY; } #endif /* $Source: /cvs/libtom/libtommath/bn_mp_reduce_2k_setup.c,v $ */ /* $Revision: 1.3 $ */ /* $Date: 2006/03/31 14:18:44 $ */