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Add OutputByteInputTableCodingLoop class.

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Natalia Portillo
2019-02-11 01:42:50 +00:00
parent 7e6a8e1c07
commit cff3ccd11d
2 changed files with 39 additions and 0 deletions
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1
Claunia.ReedSolomon/Claunia.ReedSolomon.csproj
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@@ -51,6 +51,7 @@
<Compile Include="InputOutputByteTableCodingLoop.cs" />
<Compile Include="Matrix.cs" />
<Compile Include="OutputByteInputExpCodingLoop.cs" />
<Compile Include="OutputByteInputTableCodingLoop.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<ItemGroup>

38
Claunia.ReedSolomon/OutputByteInputTableCodingLoop.cs Normal file
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@@ -0,0 +1,38 @@
/**
* One specific ordering/nesting of the coding loops.
*
* Copyright 2015, Backblaze, Inc. All rights reserved.
* Copyright © 2019 Natalia Portillo
*/
namespace Claunia.ReedSolomon
{
public class OutputByteInputTableCodingLoop : CodingLoopBase
{
public override void CodeSomeShards(byte[][] matrixRows, byte[][] inputs, int inputCount, byte[][] outputs,
int outputCount, int offset, int byteCount)
{
byte[][] table = Galois.MULTIPLICATION_TABLE;
for(int iOutput = 0; iOutput < outputCount; iOutput++)
{
byte[] outputShard = outputs[iOutput];
byte[] matrixRow = matrixRows[iOutput];
for(int iByte = offset; iByte < offset + byteCount; iByte++)
{
int value = 0;
for(int iInput = 0; iInput < inputCount; iInput++)
{
byte[] inputShard = inputs[iInput];
byte[] multTableRow = table[matrixRow[iInput] & 0xFF];
value ^= multTableRow[inputShard[iByte] & 0xFF];
}
outputShard[iByte] = (byte)value;
}
}
}
}
}