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| 1 | #include <tommath.h> |
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| 2 | #ifdef BN_MP_CMP_D_C |
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| 3 | /* LibTomMath, multiple-precision integer library -- Tom St Denis |
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| 4 | * |
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| 5 | * LibTomMath is a library that provides multiple-precision |
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| 6 | * integer arithmetic as well as number theoretic functionality. |
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| 7 | * |
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| 8 | * The library was designed directly after the MPI library by |
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| 9 | * Michael Fromberger but has been written from scratch with |
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| 10 | * additional optimizations in place. |
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| 11 | * |
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| 12 | * The library is free for all purposes without any express |
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| 13 | * guarantee it works. |
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| 14 | * |
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| 15 | * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com |
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| 16 | */ |
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| 17 | |
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| 18 | /* compare a digit */ |
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| 19 | int mp_cmp_d(mp_int * a, mp_digit b) |
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| 20 | { |
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| 21 | /* compare based on sign */ |
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| 22 | if (a->sign == MP_NEG) { |
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| 23 | return MP_LT; |
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| 24 | } |
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| 25 | |
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| 26 | /* compare based on magnitude */ |
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| 27 | if (a->used > 1) { |
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| 28 | return MP_GT; |
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| 29 | } |
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| 30 | |
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| 31 | /* compare the only digit of a to b */ |
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| 32 | if (a->dp[0] > b) { |
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| 33 | return MP_GT; |
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| 34 | } else if (a->dp[0] < b) { |
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| 35 | return MP_LT; |
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| 36 | } else { |
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| 37 | return MP_EQ; |
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| 38 | } |
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| 39 | } |
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| 40 | #endif |
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| 41 | |
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| 42 | /* $Source: /cvsroot/tcl/libtommath/bn_mp_cmp_d.c,v $ */ |
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| 43 | /* $Revision: 1.1.1.3 $ */ |
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| 44 | /* $Date: 2006/12/01 00:08:11 $ */ |
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