diff options
Diffstat (limited to 'libtommath/bn_mp_mod_2d.c')
-rw-r--r-- | libtommath/bn_mp_mod_2d.c | 59 |
1 files changed, 30 insertions, 29 deletions
diff --git a/libtommath/bn_mp_mod_2d.c b/libtommath/bn_mp_mod_2d.c index 0170f65..bf69221 100644 --- a/libtommath/bn_mp_mod_2d.c +++ b/libtommath/bn_mp_mod_2d.c @@ -1,4 +1,4 @@ -#include <tommath.h> +#include "tommath_private.h" #ifdef BN_MP_MOD_2D_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -11,41 +11,42 @@ * * The library is free for all purposes without any express * guarantee it works. - * - * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com */ /* calc a value mod 2**b */ -int -mp_mod_2d (const mp_int * a, int b, mp_int * c) +int mp_mod_2d(const mp_int *a, int b, mp_int *c) { - int x, res; + int x, res; - /* if b is <= 0 then zero the int */ - if (b <= 0) { - mp_zero (c); - return MP_OKAY; - } + /* if b is <= 0 then zero the int */ + if (b <= 0) { + mp_zero(c); + return MP_OKAY; + } - /* if the modulus is larger than the value than return */ - if (b >= (int) (a->used * DIGIT_BIT)) { - res = mp_copy (a, c); - return res; - } + /* if the modulus is larger than the value than return */ + if (b >= (a->used * DIGIT_BIT)) { + res = mp_copy(a, c); + return res; + } - /* copy */ - if ((res = mp_copy (a, c)) != MP_OKAY) { - return res; - } + /* copy */ + if ((res = mp_copy(a, c)) != MP_OKAY) { + return res; + } - /* zero digits above the last digit of the modulus */ - for (x = (b / DIGIT_BIT) + ((b % DIGIT_BIT) == 0 ? 0 : 1); x < c->used; x++) { - c->dp[x] = 0; - } - /* clear the digit that is not completely outside/inside the modulus */ - c->dp[b / DIGIT_BIT] &= - (mp_digit) ((((mp_digit) 1) << (((mp_digit) b) % DIGIT_BIT)) - ((mp_digit) 1)); - mp_clamp (c); - return MP_OKAY; + /* zero digits above the last digit of the modulus */ + for (x = (b / DIGIT_BIT) + (((b % DIGIT_BIT) == 0) ? 0 : 1); x < c->used; x++) { + c->dp[x] = 0; + } + /* clear the digit that is not completely outside/inside the modulus */ + c->dp[b / DIGIT_BIT] &= + ((mp_digit)1 << (mp_digit)(b % DIGIT_BIT)) - (mp_digit)1; + mp_clamp(c); + return MP_OKAY; } #endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |