public int Put <T>(int offset, Span <T> x)
where T : struct
{
if (x.Length == 0)
{
throw new ArgumentException("Cannot put an empty array");
}
if (!IsSupportedType <T>())
{
throw new ArgumentException("Cannot put an array of type "
+ typeof(T) + " into this buffer");
}
if (BitConverter.IsLittleEndian)
{
int numBytes = ByteBuffer.ArraySize(x);
offset -= numBytes;
AssertOffsetAndLength(offset, numBytes);
// if we are LE, just do a block copy
MemoryMarshal.Cast <T, byte>(x).CopyTo(_buffer.Span.Slice(offset, numBytes));
}
else
{
throw new NotImplementedException("Big Endian Support not implemented yet " +
"for putting typed arrays");
// if we are BE, we have to swap each element by itself
//for(int i = x.Length - 1; i >= 0; i--)
//{
// todo: low priority, but need to genericize the Put<T>() functions
//}
}
return(offset);
}
/// <summary>
/// Copies an array segment of type T into this buffer, ending at the
/// given offset into this buffer. The starting offset is calculated
/// based on the count of the array segment and is the value returned.
/// </summary>
/// <typeparam name="T">The type of the input data (must be a struct)
/// </typeparam>
/// <param name="offset">The offset into this buffer where the copy
/// will end</param>
/// <param name="x">The array segment to copy data from</param>
/// <returns>The 'start' location of this buffer now, after the copy
/// completed</returns>
public int Put <T>(int offset, ArraySegment <T> x)
where T : struct
{
if (x.Equals(default(ArraySegment <T>)))
{
throw new ArgumentNullException("Cannot put a uninitialized array segment");
}
if (x.Count == 0)
{
throw new ArgumentException("Cannot put an empty array");
}
if (!IsSupportedType <T>())
{
throw new ArgumentException("Cannot put an array of type "
+ typeof(T) + " into this buffer");
}
if (BitConverter.IsLittleEndian)
{
int numBytes = ByteBuffer.ArraySize(x);
offset -= numBytes;
AssertOffsetAndLength(offset, numBytes);
// if we are LE, just do a block copy
#if ENABLE_SPAN_T && (UNSAFE_BYTEBUFFER || NETSTANDARD2_1)
MemoryMarshal.Cast <T, byte>(x).CopyTo(_buffer.Span.Slice(offset, numBytes));
#else
var srcOffset = ByteBuffer.SizeOf <T>() * x.Offset;
Buffer.BlockCopy(x.Array, srcOffset, _buffer.Buffer, offset, numBytes);
#endif
}
else
{
throw new NotImplementedException("Big Endian Support not implemented yet " +
"for putting typed arrays");
// if we are BE, we have to swap each element by itself
//for(int i = x.Length - 1; i >= 0; i--)
//{
// todo: low priority, but need to genericize the Put<T>() functions
//}
}
return(offset);
}
