/// <summary>
/// Reads the specified number of bits, clamped between one and <paramref name="maxBitCount"/>, into the given buffer.
/// </summary>
/// <param name="destination">The destination span.</param>
/// <param name="bitCount">The number of bits to read.</param>
/// <param name="maxBitCount">The maximum amount of bits to read.</param>
public static bool TryReadBits(this IBitBuffer buffer, Span <byte> destination, int bitCount, int maxBitCount)
{
Debug.Assert(bitCount >= 1);
Debug.Assert(bitCount <= maxBitCount);
return(buffer.TryReadBits(destination, bitCount));
}
/// <summary>
/// Reads the specified number of bits into the given buffer.
/// </summary>
/// <param name="destination">The destination span.</param>
/// <param name="bitCount">The number of bits to read.</param>
/// <exception cref="EndOfMessageException"></exception>
public static void ReadBits(this IBitBuffer buffer, Span <byte> destination, int bitCount)
{
if (!buffer.TryReadBits(destination, bitCount))
{
throw new EndOfMessageException();
}
}
public static bool ReadUInt16(this IBitBuffer buffer, int bitCount, out ushort result)
{
Span <byte> tmp = stackalloc byte[sizeof(ushort)];
tmp.Clear();
if (!buffer.TryReadBits(tmp, bitCount, tmp.Length * 8))
{
result = default;
return(false);
}
result = BinaryPrimitives.ReadUInt16LittleEndian(tmp);
return(true);
}
/// <summary>
/// Tries to read bytes into the given span.
/// </summary>
/// <param name="destination">The destination span.</param>
public static bool TryRead(this IBitBuffer buffer, Span <byte> destination)
{
if (!buffer.IsByteAligned())
{
return(buffer.TryReadBits(destination, destination.Length * 8));
}
if (!buffer.HasEnoughBits(destination.Length))
{
return(false);
}
buffer.GetBuffer().AsSpan(buffer.BytePosition, destination.Length).CopyTo(destination);
buffer.BitPosition += destination.Length * 8;
return(true);
}