/// <summary>
/// Returns an 64-bit integer from a specific position in a byte array.
/// </summary>
/// <param name="x">The byte array.</param>
/// <param name="offset">The offset to read the integer from.</param>
/// <param name="endianness">The read order.</param>
/// <returns></returns>
public static long GetInt64(this byte[] x, int offset
, DataTypes.Endianness endianness = DataTypes.Endianness.LittleEndian)
{
int result = -1;
if (offset >= 0 && offset <= x.Count() - 8)
{
switch (endianness)
{
case DataTypes.Endianness.BigEndian:
result = x[offset] << 56 | x[offset + 1] << 48
| x[offset + 2] << 40 | x[offset + 3] << 32
| x[offset + 4] << 24 | x[offset + 5] << 16
| x[offset + 6] << 8 | x[offset + 7];
break;
case DataTypes.Endianness.LittleEndian:
result = x[offset + 7] << 56 | x[offset + 6] << 48
| x[offset + 5] << 40 | x[offset + 4] << 32
| x[offset + 3] << 24 | x[offset + 2] << 16
| x[offset + 1] << 8 | x[offset];
break;
}
}
return(result);
}
/// <summary>
/// Returns an 16-bit integer from a specific position in a byte array.
/// </summary>
/// <param name="x">The byte array.</param>
/// <param name="offset">The offset to read the integer from.</param>
/// <param name="endianness">The read order.</param>
/// <returns></returns>
public static int GetInt16(this byte[] x, int offset
, DataTypes.Endianness endianness = DataTypes.Endianness.LittleEndian)
{
int result = -1;
if (offset >= 0 && offset <= x.Count() - 2)
{
switch (endianness)
{
case DataTypes.Endianness.BigEndian:
result = x[offset] << 8 | x[offset + 1];
break;
case DataTypes.Endianness.LittleEndian:
result = x[offset + 1] << 8 | x[offset];
break;
}
}
return(result);
}
