41 lines
993 B
C
41 lines
993 B
C
#include "amplify_tommath_private.h"
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#ifdef AMPLIFY_BN_MP_CMP_MAG_C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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/* Modifications Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. */
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/* compare maginitude of two ints (unsigned) */
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amplify_mp_ord amplify_mp_cmp_mag(const amplify_mp_int *a, const amplify_mp_int *b)
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{
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int n;
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const amplify_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 AMPLIFY_MP_GT;
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}
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if (a->used < b->used) {
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return AMPLIFY_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 AMPLIFY_MP_GT;
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}
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if (*tmpa < *tmpb) {
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return AMPLIFY_MP_LT;
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}
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}
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return AMPLIFY_MP_EQ;
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}
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#endif
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