From ab6e3fce040f9ad27cbce44e9038a24f15b601c8 Mon Sep 17 00:00:00 2001 From: Matthieu Patou Date: Sun, 15 Aug 2010 18:31:28 +0400 Subject: s4:heimdal: import lorikeet-heimdal-201009250123 (commit 42cabfb5b683dbcb97d583c397b897507689e382) I based this on Matthieu's import of lorikeet-heimdal, and then updated it to this commit. Andrew Bartlett --- .../heimdal/lib/hcrypto/libtommath/bn_mp_clamp.c | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 source4/heimdal/lib/hcrypto/libtommath/bn_mp_clamp.c (limited to 'source4/heimdal/lib/hcrypto/libtommath/bn_mp_clamp.c') diff --git a/source4/heimdal/lib/hcrypto/libtommath/bn_mp_clamp.c b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_clamp.c new file mode 100644 index 0000000000..359c2ff24d --- /dev/null +++ b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_clamp.c @@ -0,0 +1,44 @@ +#include +#ifdef BN_MP_CLAMP_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, tomstdenis@gmail.com, http://libtom.org + */ + +/* trim unused digits + * + * This is used to ensure that leading zero digits are + * trimed and the leading "used" digit will be non-zero + * Typically very fast. Also fixes the sign if there + * are no more leading digits + */ +void +mp_clamp (mp_int * a) +{ + /* decrease used while the most significant digit is + * zero. + */ + while (a->used > 0 && a->dp[a->used - 1] == 0) { + --(a->used); + } + + /* reset the sign flag if used == 0 */ + if (a->used == 0) { + a->sign = MP_ZPOS; + } +} +#endif + +/* $Source: /cvs/libtom/libtommath/bn_mp_clamp.c,v $ */ +/* $Revision: 1.4 $ */ +/* $Date: 2006/12/28 01:25:13 $ */ -- cgit