frost/secp256k1-zkp
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Eliminate a few unbraced statements that crept into the code.

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Also avoids some easily avoided multiple-returns.
This commit is contained in:
Gregory Maxwell
2015-09-21 17:21:35 +00:00
parent eeab823b70
commit 912f203fc5
10 changed files with 84 additions and 52 deletions
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50
src/group_impl.h
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@@ -112,18 +112,17 @@ static void secp256k1_ge_set_table_gej_var(size_t len, secp256k1_ge_t *r, const
size_t i = len - 1;
secp256k1_fe_t zi;
if (len < 1)
return;
/* Compute the inverse of the last z coordinate, and use it to compute the last affine output. */
secp256k1_fe_inv(&zi, &a[i].z);
secp256k1_ge_set_gej_zinv(&r[i], &a[i], &zi);
/* Work out way backwards, using the z-ratios to scale the x/y values. */
while (i > 0) {
secp256k1_fe_mul(&zi, &zi, &zr[i]);
i--;
if (len > 0) {
/* Compute the inverse of the last z coordinate, and use it to compute the last affine output. */
secp256k1_fe_inv(&zi, &a[i].z);
secp256k1_ge_set_gej_zinv(&r[i], &a[i], &zi);
/* Work out way backwards, using the z-ratios to scale the x/y values. */
while (i > 0) {
secp256k1_fe_mul(&zi, &zi, &zr[i]);
i--;
secp256k1_ge_set_gej_zinv(&r[i], &a[i], &zi);
}
}
}
@@ -131,23 +130,22 @@ static void secp256k1_ge_globalz_set_table_gej(size_t len, secp256k1_ge_t *r, se
size_t i = len - 1;
secp256k1_fe_t zs;
if (len < 1)
return;
if (len > 0) {
/* The z of the final point gives us the "global Z" for the table. */
r[i].x = a[i].x;
r[i].y = a[i].y;
*globalz = a[i].z;
r[i].infinity = 0;
zs = zr[i];
/* The z of the final point gives us the "global Z" for the table. */
r[i].x = a[i].x;
r[i].y = a[i].y;
*globalz = a[i].z;
r[i].infinity = 0;
zs = zr[i];
/* Work our way backwards, using the z-ratios to scale the x/y values. */
while (i > 0) {
if (i != len - 1) {
secp256k1_fe_mul(&zs, &zs, &zr[i]);
/* Work our way backwards, using the z-ratios to scale the x/y values. */
while (i > 0) {
if (i != len - 1) {
secp256k1_fe_mul(&zs, &zs, &zr[i]);
}
i--;
secp256k1_ge_set_gej_zinv(&r[i], &a[i], &zs);
}
i--;
secp256k1_ge_set_gej_zinv(&r[i], &a[i], &zs);
}
}