tommath/bn_mp_cmp_d.c

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#include <tommath_private.h>
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#ifdef BN_MP_CMP_D_C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
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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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* The library was designed directly after the MPI library by
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* 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, tstdenis82@gmail.com, http://libtom.org
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*/
/* compare a digit */
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int mp_cmp_d(mp_int *a, mp_digit b)
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{
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/* compare based on sign */
if (a->sign == MP_NEG) {
return MP_LT;
}
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/* compare based on magnitude */
if (a->used > 1) {
return MP_GT;
}
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/* compare the only digit of a to b */
if (a->dp[0] > b) {
return MP_GT;
} else if (a->dp[0] < b) {
return MP_LT;
} else {
return MP_EQ;
}
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}
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#endif
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/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */