frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add secp256k1_num_eq and use it in tests

Browse Source
This commit is contained in:
Pieter Wuille
2014-08-09 19:22:42 +02:00
parent 13e44df743
commit 1a749b4a6e
4 changed files with 39 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/num_gmp_impl.h
View File

@@ -161,6 +161,13 @@ int static secp256k1_num_cmp(const secp256k1_num_t *a, const secp256k1_num_t *b)
return mpn_cmp(a->data, b->data, a->limbs);
}
int static secp256k1_num_eq(const secp256k1_num_t *a, const secp256k1_num_t *b) {
if (a->limbs > b->limbs) return 0;
if (a->limbs < b->limbs) return 0;
if ((a->neg && !secp256k1_num_is_zero(a)) != (b->neg && !secp256k1_num_is_zero(b))) return 0;
return mpn_cmp(a->data, b->data, a->limbs) == 0;
}
void static secp256k1_num_subadd(secp256k1_num_t *r, const secp256k1_num_t *a, const secp256k1_num_t *b, int bneg) {
if (!(b->neg ^ bneg ^ a->neg)) { // a and b have the same sign
r->neg = a->neg;