/// <summary>
/// <p>Given data and error-correction codewords received, possibly corrupted by errors, attempts to
/// correct the errors in-place.</p>
///
/// <param name="codewords">data and error correction codewords</param>
/// </summary>
private bool correctErrors(int[] codewords,
int[] erasures,
int numECCodewords)
{
if (erasures.Length > numECCodewords / 2 + MAX_ERRORS ||
numECCodewords < 0 || numECCodewords > MAX_EC_CODEWORDS)
{
// Too many errors or EC Codewords is corrupted
return(false);
}
return(errorCorrection.decode(codewords, numECCodewords, erasures));
}
private bool checkDecode(int[] received, int[] erasures)
{
if (!ec.decode(received, ECC_BYTES, erasures))
{
return(false);
}
for (int i = 0; i < PDF417_TEST.Length; i++)
{
if (received[i] != PDF417_TEST[i])
{
return(false);
}
}
return(true);
}
/// <summary>
/// Given data and error-correction codewords received, possibly corrupted by errors, attempts to
/// correct the errors in-place.
/// </summary>
/// <returns>The errors.</returns>
/// <param name="codewords">data and error correction codewords.</param>
/// <param name="erasures">positions of any known erasures.</param>
/// <param name="numECCodewords">number of error correction codewords that are available in codewords.</param>
private static int correctErrors(int[] codewords, int[] erasures, int numECCodewords)
{
if (erasures != null &&
erasures.Length > numECCodewords / 2 + MAX_ERRORS ||
numECCodewords < 0 ||
numECCodewords > MAX_EC_CODEWORDS)
{
// Too many errors or EC Codewords is corrupted
return(-1);
}
int errorCount;
if (!errorCorrection.decode(codewords, numECCodewords, erasures, out errorCount))
{
return(-1);
}
return(errorCount);
}
