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22 lines
521 B
22 lines
521 B
#include "tommath_private.h"
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#ifdef BN_S_MP_GET_BIT_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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/* Get bit at position b and return MP_YES if the bit is 1, MP_NO if it is 0 */
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mp_bool s_mp_get_bit(const mp_int *a, unsigned int b)
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{
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mp_digit bit;
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int limb = (int)(b / MP_DIGIT_BIT);
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if (limb >= a->used) {
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return MP_NO;
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}
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bit = (mp_digit)1 << (b % MP_DIGIT_BIT);
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return ((a->dp[limb] & bit) != 0u) ? MP_YES : MP_NO;
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}
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#endif
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