Take over improvements from libtommath's development branch (which will appear in next version).

- More efficient MP_SET_XLONG() macro.
- New internal macro's IS_ZERO/IS_EVEN/IS_ODD
- Changed signature for XMALLOC/XREALLOC/XFREE

1 files changed, 2 insertions, 3 deletions

diff --git a/libtommath/bn_mp_is_square.c b/libtommath/bn_mp_is_square.c
index 5363a47..1dd1d6c 100644
--- a/libtommath/bn_mp_is_square.c
+++ b/libtommath/bn_mp_is_square.c
@@ -49,13 +49,12 @@ int mp_is_square(const mp_int *arg, int *ret)
       return MP_VAL;
    }
 
-   /* digits used?  (TSD) */
-   if (arg->used == 0) {
+   if (IS_ZERO(arg)) {
       return MP_OKAY;
    }
 
    /* First check mod 128 (suppose that DIGIT_BIT is at least 7) */
-   if (rem_128[127u & DIGIT(arg, 0)] == (char)1) {
+   if (rem_128[127u & arg->dp[0]] == (char)1) {
       return MP_OKAY;
    }