bf9507a9d4
* This gives the advantage that static analysis **understands** bool, but complains about using an enum type instead of bool. * If stdbool.h is not desired, true/false/bool can be replaced using sed as in the no-stdint-h branch. * We already include stdint.h and stdbool.h is not more harmful than this header
22 lines
496 B
C
22 lines
496 B
C
#include "tommath_private.h"
|
|
#ifdef S_MP_GET_BIT_C
|
|
|
|
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
|
|
/* SPDX-License-Identifier: Unlicense */
|
|
|
|
/* Get bit at position b and return true if the bit is 1, false if it is 0 */
|
|
bool s_mp_get_bit(const mp_int *a, unsigned int b)
|
|
{
|
|
mp_digit bit;
|
|
int limb = (int)(b / MP_DIGIT_BIT);
|
|
|
|
if (limb >= a->used) {
|
|
return false;
|
|
}
|
|
|
|
bit = (mp_digit)1 << (b % MP_DIGIT_BIT);
|
|
return ((a->dp[limb] & bit) != 0u);
|
|
}
|
|
|
|
#endif
|