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comparison tomsfastmath/src/addsub/fp_cmp_d.c @ 643:a362b62d38b2 dropbear-tfm

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Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a with Makefile.in renamed
author Matt Johnston <matt@ucc.asn.au>
date Wed, 23 Nov 2011 18:10:20 +0700
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642:33fd2f3499d2 643:a362b62d38b2
1 /* TomsFastMath, a fast ISO C bignum library.
2 *
3 * This project is meant to fill in where LibTomMath
4 * falls short. That is speed ;-)
5 *
6 * This project is public domain and free for all purposes.
7 *
8 * Tom St Denis, [email protected]
9 */
10 #include <tfm.h>
11
12 /* compare against a single digit */
13 int fp_cmp_d(fp_int *a, fp_digit b)
14 {
15 /* compare based on sign */
16 if ((b && a->used == 0) || a->sign == FP_NEG) {
17 return FP_LT;
18 }
19
20 /* compare based on magnitude */
21 if (a->used > 1) {
22 return FP_GT;
23 }
24
25 /* compare the only digit of a to b */
26 if (a->dp[0] > b) {
27 return FP_GT;
28 } else if (a->dp[0] < b) {
29 return FP_LT;
30 } else {
31 return FP_EQ;
32 }
33
34 }
35
36 /* $Source$ */
37 /* $Revision$ */
38 /* $Date$ */