internal int DecodeBinHex(char[] inArray, int offset, int inLength, byte[] outArray, int offsetOut, int countOut, bool flush)
{
//String msg;
if (0 > offset)
{
throw new ArgumentOutOfRangeException("offset");
}
if (0 > offsetOut)
{
throw new ArgumentOutOfRangeException("offsetOut");
}
int len = (null == inArray) ? 0 : inArray.Length;
if (len < inLength)
{
throw new ArgumentOutOfRangeException("inLength");
}
// make sure that countOut + offsetOut are okay
int outArrayLen = outArray.Length;
if (outArrayLen < (countOut + offsetOut))
{
throw new ArgumentOutOfRangeException("offsetOut");
}
int inBufferCount = inLength - offset;
if (flush)
{
_charBuffer.Refresh();
}
if (inBufferCount > 0)
{
_charBuffer.Append(inArray, offset, inLength);
}
if ((_charBuffer.Length == 0) || (countOut == 0))
{
return(0);
}
// let's just make sure countOut > 0 and countOut < outArray.Length
countOut += offsetOut;
byte lowHalfByte = 0; //TODO: Changed
// walk hex digits pairing them up and shoving the value of each pair into a byte
int internalBufferLength = _charBuffer.Length;
int offsetOutCur = offsetOut;
char ch;
int internalBufferOffset = 0;
do
{
ch = _charBuffer[internalBufferOffset++];
if (ch >= 'a' && ch <= 'f')
{
lowHalfByte = (byte)(10 + ch - 'a');
}
else if (ch >= 'A' && ch <= 'F')
{
lowHalfByte = (byte)(10 + ch - 'A');
}
else if (ch >= '0' && ch <= '9')
{
lowHalfByte = (byte)(ch - '0');
}
else if (Char.IsWhiteSpace(ch))
{
continue; // skip whitespace
} /*
* else {
* msg = new String(_charBuffer.CurrentBuffer, _charBuffer.CurrentBufferOffset, (_charBuffer.CurrentBuffer == null) ? 0:(_charBuffer.CurrentBufferLength - _charBuffer.CurrentBufferOffset));
* throw new XmlException(Res.Xml_InvalidBinHexValue, msg);
* }
*/
if (_HighNibblePresent)
{
outArray[offsetOutCur++] = (byte)((_highHalfByte << 4) + lowHalfByte);
_HighNibblePresent = false;
if (offsetOutCur == countOut)
{
break;
}
}
else
{
// shift nibble into top half of byte
_highHalfByte = lowHalfByte;
_HighNibblePresent = true;
}
}while (internalBufferOffset < internalBufferLength);
_charBuffer.CleanUp(internalBufferOffset);
return(offsetOutCur - offsetOut);
}
