public static QRPolynomial GetErrorCorrectPolynomial(int errorCorrectLength)
{
var a = new QRPolynomial(new int[] { 1 }, 0);
for (int i = 0; i < errorCorrectLength; i++)
{
a = a.Multiply(new QRPolynomial(new int[] { 1, QRMath.GExp(i) }, 0));
}
return(a);
}
public QRPolynomial Multiply(QRPolynomial other)
{
var num = new int[Length + other.Length - 1];
for (int i = 0; i < Length; i++)
{
for (int j = 0; j < other.Length; j++)
{
num[i + j] ^= QRMath.GExp(QRMath.GLog(this[i]) + QRMath.GLog(other[j]));
}
}
return(new QRPolynomial(num, 0));
}
public QRPolynomial Mod(QRPolynomial other)
{
if (Length - other.Length < 0)
{
return(this);
}
var ratio = QRMath.GLog(this[0]) - QRMath.GLog(other[0]);
var num = new int[Length];
Array.Copy(_num, num, Length);
for (int i = 0; i < other.Length; i++)
{
num[i] ^= QRMath.GExp(QRMath.GLog(other[i]) + ratio);
}
return(new QRPolynomial(num, 0).Mod(other));
}
private byte[] CreateBytes(QRBitBuffer buffer, QRRSBlock[] rsBlocks)
{
var offset = 0;
var maxDcCount = 0;
var maxEcCount = 0;
var dcdata = new int[rsBlocks.Length][];
var ecdata = new int[rsBlocks.Length][];
for (var r = 0; r < rsBlocks.Length; r += 1)
{
var dcCount = rsBlocks[r].DataCount;
var ecCount = rsBlocks[r].TotalCount - dcCount;
maxDcCount = Math.Max(maxDcCount, dcCount);
maxEcCount = Math.Max(maxEcCount, ecCount);
dcdata[r] = new int[dcCount];
for (var i = 0; i < dcdata[r].Length; i += 1)
{
dcdata[r][i] = 0xff & buffer.GetByte(i + offset);
}
offset += dcCount;
var rsPoly = QRUtil.GetErrorCorrectPolynomial(ecCount);
var rawPoly = new QRPolynomial(dcdata[r], rsPoly.Length - 1);
var modPoly = rawPoly.Mod(rsPoly);
ecdata[r] = new int[rsPoly.Length - 1];
for (var i = 0; i < ecdata[r].Length; i += 1)
{
var modIndex = i + modPoly.Length - ecdata[r].Length;
ecdata[r][i] = (modIndex >= 0) ? modPoly[modIndex] : 0;
}
}
var totalCodeCount = 0;
for (var i = 0; i < rsBlocks.Length; i += 1)
{
totalCodeCount += rsBlocks[i].TotalCount;
}
var data = new byte[totalCodeCount];
var index = 0;
for (var i = 0; i < maxDcCount; i += 1)
{
for (var r = 0; r < rsBlocks.Length; r += 1)
{
if (i < dcdata[r].Length)
{
data[index] = (byte)dcdata[r][i];
index += 1;
}
}
}
for (var i = 0; i < maxEcCount; i += 1)
{
for (var r = 0; r < rsBlocks.Length; r += 1)
{
if (i < ecdata[r].Length)
{
data[index] = (byte)ecdata[r][i];
index += 1;
}
}
}
return(data);
}
