// Read an enum type
public bool TryGetField(FieldDecl fieldDecl, out byte value)
{
FieldDefinition fieldDefinition = GetFieldDefinition(fieldDecl);
if (fieldDefinition != null && fieldDefinition.FieldType == 0x00)
{
value = _binaryReader.ReadByte();
if (value == 0xff)
{
return(false);
}
else
{
return(true);
}
}
else
{
value = 0xff;
return(false);
}
}
public bool TryGetField(FieldDecl fieldDecl, out double value)
{
value = 0;
FieldDefinition fieldDefinition = GetFieldDefinition(fieldDecl);
if (fieldDefinition == null)
{
return(false);
}
else
{
// We will return false if we encounter an invalid value in the raw data.
// The caller needs to interpret invalid values the same as missing values.
if (fieldDefinition.FieldType == 0x01)
{
sbyte raw = _binaryReader.ReadSByte();
if (raw == 0x7f)
{
return(false);
}
value = Convert.ToDouble(raw);
}
else if (fieldDefinition.FieldType == 0x02 || fieldDefinition.FieldType == 0x0A)
{
byte raw = _binaryReader.ReadByte();
if (raw == 0xff)
{
return(false);
}
value = Convert.ToDouble(raw);
}
else if (fieldDefinition.FieldType == 0x83)
{
Int16 raw = _binaryReader.ReadInt16();
if (raw == 0x7fff)
{
return(false);
}
value = Convert.ToDouble(raw);
}
else if (fieldDefinition.FieldType == 0x84 || fieldDefinition.FieldType == 0x8B)
{
UInt16 raw = _binaryReader.ReadUInt16();
if (raw == 0xffff)
{
return(false);
}
value = Convert.ToDouble(raw);
}
else if (fieldDefinition.FieldType == 0x85)
{
Int32 raw = _binaryReader.ReadInt32();
if (raw == 0x7fffffff)
{
return(false);
}
value = Convert.ToDouble(raw);
}
else if (fieldDefinition.FieldType == 0x86 || fieldDefinition.FieldType == 0x8C)
{
UInt32 raw = _binaryReader.ReadUInt32();
if (raw == 0xffffffff)
{
return(false);
}
value = Convert.ToDouble(raw);
}
else if (fieldDefinition.FieldType == 0x88)
{
// TODO: don't know how to handle floating point invalid values.
// I think I need to peek the raw bits rather than try to interpret
value = Convert.ToDouble(_binaryReader.ReadSingle());
}
else if (fieldDefinition.FieldType == 0x89)
{
// TODO: don't know how to handle floating point invalid values
// I think I need to peek the raw bits rather than try to interpret
value = Convert.ToDouble(_binaryReader.ReadDouble());
}
else
{
value = 0;
return(false);
}
return(true);
}
}
