Function fromBytes64 [src]
Map a 64 bytes big endian string into a field element
Prototype
pub fn fromBytes64(s: [64]u8) Fe Parameters
s: [64]u8 Source
pub fn fromBytes64(s: [64]u8) Fe {
var fl: [32]u8 = undefined;
var gl: [32]u8 = undefined;
var i: usize = 0;
while (i < 32) : (i += 1) {
fl[i] = s[63 - i];
gl[i] = s[31 - i];
}
fl[31] &= 0x7f;
gl[31] &= 0x7f;
var fe_f = fromBytes(fl);
const fe_g = fromBytes(gl);
fe_f.limbs[0] += (s[32] >> 7) * 19 + @as(u10, s[0] >> 7) * 722;
i = 0;
while (i < 5) : (i += 1) {
fe_f.limbs[i] += 38 * fe_g.limbs[i];
}
fe_f.reduce();
return fe_f;
}