private static object ReadAConstantValue(ILittleEndianInput in1)
{
byte grbit = (byte)in1.ReadByte();
switch (grbit)
{
case TYPE_EMPTY:
in1.ReadLong(); // 8 byte 'not used' field
return(EMPTY_REPRESENTATION);
case TYPE_NUMBER:
return(in1.ReadDouble());
case TYPE_STRING:
return(StringUtil.ReadUnicodeString(in1));
case TYPE_BOOLEAN:
return(ReadBoolean(in1));
case TYPE_ERROR_CODE:
int errCode = in1.ReadUShort();
// next 6 bytes are Unused
in1.ReadUShort();
in1.ReadInt();
return(ErrorConstant.ValueOf(errCode));
}
throw new Exception("Unknown grbit value (" + grbit + ")");
}
private static void EncodeSingleValue(ILittleEndianOutput out1, Object value)
{
if (value == EMPTY_REPRESENTATION)
{
out1.WriteByte(TYPE_EMPTY);
out1.WriteLong(0L);
return;
}
if (value is bool)
{
bool bVal = ((bool)value);
out1.WriteByte(TYPE_BOOLEAN);
long longVal = bVal ? 1L : 0L;
out1.WriteLong(longVal);
return;
}
if (value is double)
{
double dVal = (double)value;
out1.WriteByte(TYPE_NUMBER);
out1.WriteDouble(dVal);
return;
}
if (value is String)
{
String val = (String)value;
out1.WriteByte(TYPE_STRING);
StringUtil.WriteUnicodeString(out1, val);
return;
}
if (value is ErrorConstant)
{
ErrorConstant ecVal = (ErrorConstant)value;
out1.WriteByte(TYPE_ERROR_CODE);
long longVal = ecVal.ErrorCode;
out1.WriteLong(longVal);
return;
}
throw new Exception("Unexpected value type (" + value.GetType().Name + "'");
}