diff options
Diffstat (limited to 'third_party/heimdal/lib/hcrypto/libtommath/bn_mp_cmp_d.c')
-rw-r--r-- | third_party/heimdal/lib/hcrypto/libtommath/bn_mp_cmp_d.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_cmp_d.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_cmp_d.c new file mode 100644 index 0000000..5a8337b --- /dev/null +++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_cmp_d.c @@ -0,0 +1,28 @@ +#include "tommath_private.h" +#ifdef BN_MP_CMP_D_C +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ + +/* compare a digit */ +mp_ord mp_cmp_d(const mp_int *a, mp_digit b) +{ + /* compare based on sign */ + if (a->sign == MP_NEG) { + return MP_LT; + } + + /* compare based on magnitude */ + if (a->used > 1) { + return MP_GT; + } + + /* compare the only digit of a to b */ + if (a->dp[0] > b) { + return MP_GT; + } else if (a->dp[0] < b) { + return MP_LT; + } else { + return MP_EQ; + } +} +#endif |