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| author | jan.nijtmans <nijtmans@users.sourceforge.net> | 2017-02-01 15:03:59 (GMT) |
|---|---|---|
| committer | jan.nijtmans <nijtmans@users.sourceforge.net> | 2017-02-01 15:03:59 (GMT) |
| commit | 3bf70f8a7d94966b183bc23250a2b45fd4248241 (patch) | |
| tree | a3a8dd299606092b7219a6d8ae10b5deba724aab /libtommath/bn_s_mp_sub.c | |
| parent | 8826c4b5dc048432fbed200da55eef080c75b32c (diff) | |
| parent | 680d27740a871cd27464c07ed2afee0f4104dbd4 (diff) | |
| download | tcl-pyk_emptystring.zip tcl-pyk_emptystring.tar.gz tcl-pyk_emptystring.tar.bz2 | |
merge trunkpyk_emptystring
Diffstat (limited to 'libtommath/bn_s_mp_sub.c')
| -rw-r--r-- | libtommath/bn_s_mp_sub.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/libtommath/bn_s_mp_sub.c b/libtommath/bn_s_mp_sub.c index 328c9e5..c0ea556 100644 --- a/libtommath/bn_s_mp_sub.c +++ b/libtommath/bn_s_mp_sub.c @@ -1,4 +1,4 @@ -#include <tommath.h> +#include <tommath_private.h> #ifdef BN_S_MP_SUB_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -12,7 +12,7 @@ * The library is free for all purposes without any express * guarantee it works. * - * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com + * Tom St Denis, tstdenis82@gmail.com, http://libtom.org */ /* low level subtraction (assumes |a| > |b|), HAC pp.595 Algorithm 14.9 */ @@ -35,8 +35,8 @@ s_mp_sub (mp_int * a, mp_int * b, mp_int * c) c->used = max; { - register mp_digit u, *tmpa, *tmpb, *tmpc; - register int i; + mp_digit u, *tmpa, *tmpb, *tmpc; + int i; /* alias for digit pointers */ tmpa = a->dp; @@ -47,14 +47,14 @@ s_mp_sub (mp_int * a, mp_int * b, mp_int * c) u = 0; for (i = 0; i < min; i++) { /* T[i] = A[i] - B[i] - U */ - *tmpc = *tmpa++ - *tmpb++ - u; + *tmpc = (*tmpa++ - *tmpb++) - u; /* U = carry bit of T[i] * Note this saves performing an AND operation since * if a carry does occur it will propagate all the way to the * MSB. As a result a single shift is enough to get the carry */ - u = *tmpc >> ((mp_digit)(CHAR_BIT * sizeof (mp_digit) - 1)); + u = *tmpc >> ((mp_digit)((CHAR_BIT * sizeof(mp_digit)) - 1)); /* Clear carry from T[i] */ *tmpc++ &= MP_MASK; @@ -66,7 +66,7 @@ s_mp_sub (mp_int * a, mp_int * b, mp_int * c) *tmpc = *tmpa++ - u; /* U = carry bit of T[i] */ - u = *tmpc >> ((mp_digit)(CHAR_BIT * sizeof (mp_digit) - 1)); + u = *tmpc >> ((mp_digit)((CHAR_BIT * sizeof(mp_digit)) - 1)); /* Clear carry from T[i] */ *tmpc++ &= MP_MASK; @@ -83,3 +83,7 @@ s_mp_sub (mp_int * a, mp_int * b, mp_int * c) } #endif + +/* $Source$ */ +/* $Revision$ */ +/* $Date$ */ |