/// <summary>
/// Converts the members of the bit field to an integer value.
/// </summary>
/// <param name="obj">An instance of a struct that implements the interface IBitField.</param>
/// <returns>An integer representation of the bit field.</returns>
public static ulong ToUInt64(this IBitField obj)
{
ulong result = 0;
// Loop through all the properties
foreach (PropertyInfo pi in obj.GetType().GetProperties())
{
// Check if the property has an attribute of type BitFieldLengthAttribute
BitFieldInfoAttribute bitField = (pi.GetCustomAttribute(typeof(BitFieldInfoAttribute)) as BitFieldInfoAttribute);
if (bitField != null)
{
// Calculate a bitmask using the length of the bit field
ulong mask = 0;
for (byte i = 0; i < bitField.Length; i++)
{
mask |= 1UL << i;
}
// This conversion makes it possible to use different types in the bit field
ulong value = Convert.ToUInt64(pi.GetValue(obj));
result |= (value & mask) << bitField.Offset;
}
}
return(result);
}
/// <summary>
/// This method converts the struct into a string of binary values.
/// The length of the string will be equal to the number of bits in the struct
/// The least significant bit will be on the right in the string.
/// </summary>
/// <param name="obj">An instance of a struct that implements the interface IBitField.</param>
/// <returns>A string representing the binary value of tbe bit field.</returns>
public static string ToBinaryString(this IBitField obj)
{
BitFieldNumberOfBitsAttribute bitField = (obj.GetType().GetCustomAttribute(typeof(BitFieldNumberOfBitsAttribute)) as BitFieldNumberOfBitsAttribute);
if (bitField == null)
{
throw new Exception(string.Format("The attribute 'BitFieldNumberOfBitsAttribute' has to be added to the struct '{0}'.", obj.GetType().Name));
}
StringBuilder sb = new StringBuilder(bitField.BitCount);
ulong bitFieldValue = obj.ToUInt64();
for (int i = bitField.BitCount - 1; i >= 0; i--)
{
sb.Append(((bitFieldValue & (1UL << i)) > 0) ? "1" : "0");
}
return(sb.ToString());
}