Mercurial > dropbear
diff libtommath/bn_mp_div_d.c @ 1437:871b18fd7065 fuzz
merge from main (libtommath/libtomcrypt/curve25510-donna updates)
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sat, 24 Jun 2017 22:51:45 +0800 |
| parents | 60fc6476e044 |
| children | 8bba51a55704 |
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--- a/libtommath/bn_mp_div_d.c Sat Jun 24 10:34:58 2017 +0800 +++ b/libtommath/bn_mp_div_d.c Sat Jun 24 22:51:45 2017 +0800 @@ -1,4 +1,4 @@ -#include <tommath.h> +#include <tommath_private.h> #ifdef BN_MP_DIV_D_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -12,14 +12,19 @@ * The library is free for all purposes without any express * guarantee it works. * - * Tom St Denis, [email protected], http://math.libtomcrypt.com + * Tom St Denis, [email protected], http://libtom.org */ static int s_is_power_of_two(mp_digit b, int *p) { int x; - for (x = 1; x < DIGIT_BIT; x++) { + /* fast return if no power of two */ + if ((b == 0) || ((b & (b-1)) != 0)) { + return 0; + } + + for (x = 0; x < DIGIT_BIT; x++) { if (b == (((mp_digit)1)<<x)) { *p = x; return 1; @@ -42,7 +47,7 @@ } /* quick outs */ - if (b == 1 || mp_iszero(a) == 1) { + if ((b == 1) || (mp_iszero(a) == MP_YES)) { if (d != NULL) { *d = 0; } @@ -105,6 +110,6 @@ #endif -/* $Source: /cvs/libtom/libtommath/bn_mp_div_d.c,v $ */ -/* $Revision: 1.3 $ */ -/* $Date: 2006/03/31 14:18:44 $ */ +/* $Source$ */ +/* $Revision$ */ +/* $Date$ */