41 lines
1.4 KiB
C#
41 lines
1.4 KiB
C#
namespace fec
|
|
{
|
|
public abstract class CodingLoopBase : CodingLoop
|
|
{
|
|
public abstract void codeSomeShards(byte[][] matrixRows, byte[][] inputs, int inputCount, byte[][] outputs, int outputCount,
|
|
int offset, int byteCount);
|
|
|
|
public virtual bool checkSomeShards(
|
|
byte[][] matrixRows,
|
|
byte[][] inputs, int inputCount,
|
|
byte[][] toCheck, int checkCount,
|
|
int offset, int byteCount,
|
|
byte[] tempBuffer)
|
|
{
|
|
// This is the loop structure for ByteOutputInput, which does not
|
|
// require temporary buffers for checking.
|
|
byte[][] table = Galois.MULTIPLICATION_TABLE;
|
|
for (int iByte = offset; iByte < offset + byteCount; iByte++)
|
|
{
|
|
for (int iOutput = 0; iOutput < checkCount; iOutput++)
|
|
{
|
|
byte[] matrixRow = matrixRows[iOutput];
|
|
var value = 0;
|
|
for (int iInput = 0; iInput < inputCount; iInput++)
|
|
{
|
|
value ^= table[matrixRow[iInput] & 0xFF][inputs[iInput][iByte] & 0xFF];
|
|
}
|
|
|
|
if (toCheck[iOutput][iByte] != value)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
}
|
|
} |