public void Encode(byte[] message)
{
byte z_0;
byte r;
byte[] z = this.modTempResult;
byte[] g = this.codeGenPoly;
// ------------ Init ----------
Array.Clear(message, 0, this.checkwords);
Array.Clear(z, 0, z.Length);
z_0 = 0;
for (int i = message.Length - 1; i > this.checkwords; i--)
{
r = (byte)(z_0 ^ message[i]);
for (int zIter = 0; zIter < z.Length; zIter++)
{
z[zIter] ^= gf.Multiply(g[zIter], r);
}
z_0 = z[z.Length - 1];
for (int zIter = z.Length - 1; zIter >= 1; zIter--)
{
z[zIter] = z[zIter - 1];
}
z[0] = 0;
}
r = (byte)(z_0 ^ message[this.checkwords]);
for (int zIter = 0; zIter < z.Length; zIter++)
{
z[zIter] ^= gf.Multiply(g[zIter], r);
}
for (int i = 0; i < z.Length; i++)
{
message[i] = z[i];
}
}
private void RepairErrors(byte[] message, byte[] errorIndexes, byte[] omega, byte[] lp)
{
byte top;
byte bottom;
byte x;
byte xInverse;
int messageLen = message.Length;
for (int i = 0; i < messageLen; i++)
{
if (errorIndexes[i] == 0)
{
x = gf.Field[i + 1];
xInverse = gf.Inverses[x];
top = gf.PolyEval(omega, xInverse);
top = gf.Multiply(top, x);
bottom = gf.PolyEval(lp, xInverse);
message[i] ^= gf.Divide(top, bottom);
}
}
}
