/// <summary>
/// It decodes the data.
/// </summary>
/// <param name="parserContext">
/// It's the parser context holding the data to be parsed.
/// </param>
/// <param name="length">
/// It's the length of the data to get from the parser context.
/// </param>
/// <returns>
/// A byte array with the decoded data.
/// </returns>
public byte[] Decode(ref ParserContext parserContext, int length)
{
if (parserContext.DataLength < (length << 1))
{
throw new ArgumentException(SR.InsufficientData, "length");
}
byte[] result = new byte[length];
byte[] buffer = parserContext.GetBuffer();
int offset = parserContext.LowerDataBound;
for (int i = offset + (length << 1) - 1; i >= offset; i--)
{
int right = buffer[i] > 0x40 ? 10 + (buffer[i] > 0x60 ?
buffer[i] - 0x61 : buffer[i] - 0x41) : buffer[i] - 0x30;
int left = buffer[--i] > 0x40 ? 10 + (buffer[i] > 0x60 ?
buffer[i] - 0x61 : buffer[i] - 0x41) : buffer[i] - 0x30;
result[(i - offset) >> 1] = ( byte)((left << 4) | right);
}
parserContext.Consumed(length << 1);
return(result);
}
/// <summary>
/// It decodes the data.
/// </summary>
/// <param name="parserContext">
/// It's the parser context holding the data to be parsed.
/// </param>
/// <param name="length">
/// It's the length of the data to get from the parser context.
/// </param>
/// <returns>
/// A byte array with the decoded data.
/// </returns>
public byte[] Decode(ref ParserContext parserContext, int length)
{
if (parserContext.DataLength < ((length + 1) >> 1))
{
throw new ArgumentException(SR.InsufficientData, "length");
}
byte[] result = new byte[length];
byte[] buffer = parserContext.GetBuffer();
int offset = parserContext.LowerDataBound;
int start = (((length & 1) == 1) && _leftPadded) ? 1 : 0;
for (int i = start; i < length + start; i++)
{
int shift = ((i & 1) == 1 ? 0 : 4);
byte c = ( byte )((buffer[offset + (i >> 1)] >> shift) & 0x0F);
if (c < 10)
{
c += 0x30;
}
else
{
c += 0x37;
}
result[i - start] = c;
}
parserContext.Consumed((length + 1) >> 1);
return(result);
}
/// <summary>
/// Convierte los datos formateados del indicador de largo
/// de los datos del componente de mensajería.
/// </summary>
/// <param name="parserContext">
/// Es el contexto de análisis y construcción de mensajes donde
/// reside la información a decodificar.
/// </param>
/// <returns>
/// Es el largo de los datos del componente de mensajería.
/// </returns>
public int Decode(ref ParserContext parserContext)
{
// Check available data.
if (parserContext.DataLength < (_lengthsIndex + 1))
{
throw new ArgumentException(SR.InsufficientData, "parserContext");
}
int length = 0;
byte[] buffer = parserContext.GetBuffer();
int offset = parserContext.LowerDataBound;
// Decode length.
for (int i = offset; i < (offset + _lengthsIndex + 1); i++)
{
if ((buffer[i] < 0x30) || (buffer[i] > 0x39))
{
throw new MessagingException(SR.InvalidByteLengthDetected(buffer[i]));
}
length = length * 10 + buffer[i] - 0x30;
}
// Consume parser context data.
parserContext.Consumed(_lengthsIndex + 1);
return(length);
}
/// <summary>
/// Gets the encoded length from the parser context.
/// </summary>
/// <param name="parserContext">
/// It's the parser context holding the data to be parsed.
/// </param>
/// <returns>
/// The length parsed from the parser context.
/// </returns>
public int Decode(ref ParserContext parserContext)
{
// Check available data.
if (parserContext.DataLength < (_lengthsIndex + 1))
{
throw new ArgumentException(SR.InsufficientData, "parserContext");
}
int length = 0;
int value;
byte[] buffer = parserContext.GetBuffer();
int offset = parserContext.LowerDataBound;
// Decode length.
for (int i = offset; i <= (offset + _lengthsIndex); i++)
{
value = (buffer[i] & 0xF0) >> 4;
if (value > 9)
{
throw new MessagingException(SR.InvalidLengthDetected(value));
}
length = length * 10 + value;
value = buffer[i] & 0x0F;
if (value > 9)
{
throw new MessagingException(SR.InvalidLengthType(value));
}
length = length * 10 + value;
}
// Consume parser context data.
parserContext.Consumed(_lengthsIndex + 1);
return(length);
}
/// <summary>
/// Gets the encoded length from the parser context.
/// </summary>
/// <param name="parserContext">
/// It's the parser context holding the data to be parsed.
/// </param>
/// <returns>
/// The length parsed from the parser context.
/// </returns>
public int Decode(ref ParserContext parserContext)
{
// Check available data.
if (parserContext.DataLength < (_lengthsIndex + 1))
{
throw new ArgumentException(SR.InsufficientData, "parserContext");
}
int length = 0;
byte[] buffer = parserContext.GetBuffer();
int offset = parserContext.LowerDataBound;
// Decode length.
for (int i = offset; i <= (offset + _lengthsIndex); i++)
{
length = (length * 256) + (( int )buffer[i]);
}
// Consume parser context data.
parserContext.Consumed(_lengthsIndex + 1);
return(length);
}