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Improve a couple of the bignum macros. Note, this doesn't eliminate

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tolerance of ambiguous zero-representation, it just improves
BN_abs_is_word() and simplifies other macros that depend on it.
This commit is contained in:
Geoff Thorpe 2003-11-30 22:02:10 +00:00
parent 5734bebe05
commit 23fc5ac646
1 changed files with 5 additions and 5 deletions
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10
crypto/bn/bn.h
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@ -341,12 +341,12 @@ int BN_GENCB_call(BN_GENCB *cb, int a, int b);
#define BN_num_bytes(a) ((BN_num_bits(a)+7)/8)
/* Note that BN_abs_is_word does not work reliably for w == 0 */
#define BN_abs_is_word(a,w) (((a)->top == 1) && ((a)->d[0] == (BN_ULONG)(w)))
#define BN_is_zero(a) (((a)->top == 0) || BN_abs_is_word(a,0))
/* Note that BN_abs_is_word didn't work reliably for w == 0 until 0.9.8 */
#define BN_abs_is_word(a,w) ((((a)->top == 1) && ((a)->d[0] == (BN_ULONG)(w))) || \
(((w) == 0) && ((a)->top == 0)))
#define BN_is_zero(a) BN_abs_is_word(a,0)
#define BN_is_one(a) (BN_abs_is_word((a),1) && !(a)->neg)
#define BN_is_word(a,w) ((w) ? BN_abs_is_word((a),(w)) && !(a)->neg : \
BN_is_zero((a)))
#define BN_is_word(a,w) (BN_abs_is_word((a),(w)) && (!(w) || !(a)->neg))
#define BN_is_odd(a) (((a)->top > 0) && ((a)->d[0] & 1))
#define BN_one(a) (BN_set_word((a),1))