30 lines
701 B
C
30 lines
701 B
C
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#include "tommath_private.h"
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#ifdef MP_LOG_N_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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mp_err mp_log_n(const mp_int *a, int base, int *c)
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{
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if (mp_isneg(a) || mp_iszero(a) || (base < 2) || (unsigned)base > (unsigned)MP_DIGIT_MAX) {
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return MP_VAL;
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}
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if (MP_HAS(S_MP_LOG_2EXPT) && MP_IS_2EXPT((mp_digit)base)) {
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*c = s_mp_log_2expt(a, (mp_digit)base);
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return MP_OKAY;
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}
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if (MP_HAS(S_MP_LOG_D) && (a->used == 1)) {
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*c = s_mp_log_d((mp_digit)base, a->dp[0]);
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return MP_OKAY;
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}
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if (MP_HAS(S_MP_LOG)) {
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return s_mp_log(a, (mp_digit)base, c);
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}
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return MP_VAL;
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}
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#endif
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