/// <summary>
/// Writes a primitive array to the stream.
/// </summary>
/// <typeparam name="T">The element type of the primitive array. Valid element types can be determined using <see cref="FormatterUtilities.IsPrimitiveArrayType(Type)" />.</typeparam>
/// <param name="array">The primitive array to write.</param>
/// <exception cref="System.ArgumentException">Type + typeof(T).Name + is not a valid primitive array type.</exception>
public override void WritePrimitiveArray <T>(T[] array)
{
if (FormatterUtilities.IsPrimitiveArrayType(typeof(T)) == false)
{
throw new ArgumentException("Type " + typeof(T).Name + " is not a valid primitive array type.");
}
int bytesPerElement = PrimitiveSizes[typeof(T)];
int byteCount = array.Length * bytesPerElement;
// Write entry flag
this.Stream.WriteByte((byte)BinaryEntryType.PrimitiveArray);
// Write array length
ProperBitConverter.GetBytes(this.buffer, 0, array.Length);
this.Stream.Write(this.buffer, 0, 4);
// Write size of an element in bytes
ProperBitConverter.GetBytes(this.buffer, 0, bytesPerElement);
this.Stream.Write(this.buffer, 0, 4);
// Write the actual array content
if (typeof(T) == typeof(byte))
{
// We can include a special case for byte arrays, as there's no need to copy that to a buffer
var byteArray = (byte[])(object)array;
this.Stream.Write(byteArray, 0, byteCount);
}
else
{
// Otherwise we copy to a buffer in order to write the entire array into the stream with one call
using (var tempBuffer = Buffer <byte> .Claim(byteCount))
{
if (BitConverter.IsLittleEndian)
{
// We always store in little endian, so we can do a direct memory mapping, which is a lot faster
UnsafeUtilities.MemoryCopy(array, tempBuffer.Array, byteCount, 0, 0);
}
else
{
// We have to convert each individual element to bytes, since the byte order has to be reversed
Action <byte[], int, T> toBytes = (Action <byte[], int, T>)PrimitiveGetBytesMethods[typeof(T)];
var b = tempBuffer.Array;
for (int i = 0; i < array.Length; i++)
{
toBytes(b, i * bytesPerElement, array[i]);
}
}
this.Stream.Write(tempBuffer.Array, 0, byteCount);
}
}
}
