39 lines
921 B
C
39 lines
921 B
C
/* 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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#include <tommath.h>
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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 */
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if (a->sign == MP_NEG) {
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return MP_LT;
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}
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/* compare based on magnitude */
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if (a->used > 1) {
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return MP_GT;
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}
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/* compare the only digit of a to b */
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if (a->dp[0] > b) {
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return MP_GT;
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} else if (a->dp[0] < b) {
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return MP_LT;
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} else {
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return MP_EQ;
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}
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}
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