/// <summary>
/// Writes a integer value from to the buffer.
/// </summary>
private int WriteField(TsCCpxContext context, Integer field, object fieldValue)
{
byte[] buffer = context.Buffer;
// initialize serialization paramters.
int length = (field.LengthSpecified) ? (int)field.Length : 4;
bool signed = field.Signed;
// apply defaults for built in types.
if (field.GetType() == typeof(Int8))
{
length = 1; signed = true;
}
else if (field.GetType() == typeof(Int16))
{
length = 2; signed = true;
}
else if (field.GetType() == typeof(Int32))
{
length = 4; signed = true;
}
else if (field.GetType() == typeof(Int64))
{
length = 8; signed = true;
}
else if (field.GetType() == typeof(UInt8))
{
length = 1; signed = false;
}
else if (field.GetType() == typeof(UInt16))
{
length = 2; signed = false;
}
else if (field.GetType() == typeof(UInt32))
{
length = 4; signed = false;
}
else if (field.GetType() == typeof(UInt64))
{
length = 8; signed = false;
}
// only write to the buffer if it has been allocated.
if (buffer != null)
{
// check if there is enough data left.
if (buffer.Length - context.Index < length)
{
throw new TsCCpxInvalidDataToWriteException("Unexpected end of buffer.");
}
// copy and swap bytes if required.
byte[] bytes = null;
if (signed)
{
switch (length)
{
case 1:
{
bytes = new byte[1];
sbyte value = Convert.ToSByte(fieldValue);
if (value < 0)
{
bytes[0] = (byte)(Byte.MaxValue + value + 1);
}
else
{
bytes[0] = (byte)value;
}
break;
}
case 2: { bytes = BitConverter.GetBytes(Convert.ToInt16(fieldValue)); break; }
case 4: { bytes = BitConverter.GetBytes(Convert.ToInt32(fieldValue)); break; }
case 8: { bytes = BitConverter.GetBytes(Convert.ToInt64(fieldValue)); break; }
default: { bytes = (byte[])fieldValue; break; }
}
}
else
{
switch (length)
{
case 1: { bytes = new byte[] { Convert.ToByte(fieldValue) }; break; }
case 2: { bytes = BitConverter.GetBytes(Convert.ToUInt16(fieldValue)); break; }
case 4: { bytes = BitConverter.GetBytes(Convert.ToUInt32(fieldValue)); break; }
case 8: { bytes = BitConverter.GetBytes(Convert.ToUInt64(fieldValue)); break; }
default: { bytes = (byte[])fieldValue; break; }
}
}
// copy and swap bytes.
if (context.BigEndian)
{
SwapBytes(bytes, 0, length);
}
// write bytes to buffer.
for (int ii = 0; ii < bytes.Length; ii++)
{
buffer[context.Index + ii] = bytes[ii];
}
}
return(length);
}
