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fc43a488cc
--HG-- branch : libtommath-orig extra : convert_revision : 0dc5b2d6d8c18b7e32b077cd8051bd63835afa1e
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#include <tommath.h>
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#ifdef BN_MP_CMP_MAG_C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis
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*
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* LibTomMath is a library that provides multiple-precision
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* integer arithmetic as well as number theoretic functionality.
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*
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* The library was designed directly after the MPI library by
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* Michael Fromberger but has been written from scratch with
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* additional optimizations in place.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
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*/
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/* compare maginitude of two ints (unsigned) */
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int mp_cmp_mag (mp_int * a, mp_int * b)
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{
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int n;
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mp_digit *tmpa, *tmpb;
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/* compare based on # of non-zero digits */
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if (a->used > b->used) {
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return MP_GT;
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}
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if (a->used < b->used) {
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return MP_LT;
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}
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/* alias for a */
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tmpa = a->dp + (a->used - 1);
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/* alias for b */
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tmpb = b->dp + (a->used - 1);
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/* compare based on digits */
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for (n = 0; n < a->used; ++n, --tmpa, --tmpb) {
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if (*tmpa > *tmpb) {
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return MP_GT;
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}
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if (*tmpa < *tmpb) {
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return MP_LT;
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}
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}
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return MP_EQ;
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}
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#endif
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