Mercurial > dropbear
view libtommath/bn_mp_cmp_mag.c @ 1495:0c16b4ccbd54
make signal flags volatile, simplify handling
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 14 Feb 2018 23:06:01 +0800 |
parents | 8bba51a55704 |
children | f52919ffd3b1 |
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#include <tommath_private.h> #ifdef BN_MP_CMP_MAG_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://libtom.org */ /* compare maginitude of two ints (unsigned) */ int mp_cmp_mag (mp_int * a, mp_int * b) { int n; mp_digit *tmpa, *tmpb; /* compare based on # of non-zero digits */ if (a->used > b->used) { return MP_GT; } if (a->used < b->used) { return MP_LT; } /* alias for a */ tmpa = a->dp + (a->used - 1); /* alias for b */ tmpb = b->dp + (a->used - 1); /* compare based on digits */ for (n = 0; n < a->used; ++n, --tmpa, --tmpb) { if (*tmpa > *tmpb) { return MP_GT; } if (*tmpa < *tmpb) { return MP_LT; } } return MP_EQ; } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */