public static ReadOnlySpan <byte> AsBytes <T>(this ReadOnlySpan <T> source)
where T : struct
{
if (!SpanHelpers.IsReferenceFree <T>())
{
ThrowHelper.ThrowArgumentException_InvalidTypeWithPointersNotSupported(typeof(T));
}
int newLength = checked (source.Length * Unsafe.SizeOf <T>());
return(new ReadOnlySpan <byte>(Unsafe.As <Pinnable <byte> >(source.Pinnable), source.ByteOffset, newLength));
}
public unsafe Span(void *pointer, int length)
{
if (!SpanHelpers.IsReferenceFree <T>())
{
ThrowHelper.ThrowArgumentException_InvalidTypeWithPointersNotSupported(typeof(T));
}
if (length < 0)
{
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.start);
}
_length = length;
_pinnable = null;
_byteOffset = new IntPtr(pointer);
}
public static Span <TTo> NonPortableCast <TFrom, TTo>(this Span <TFrom> source)
where TFrom : struct
where TTo : struct
{
if (!SpanHelpers.IsReferenceFree <TFrom>())
{
ThrowHelper.ThrowArgumentException_InvalidTypeWithPointersNotSupported(typeof(TFrom));
}
if (!SpanHelpers.IsReferenceFree <TTo>())
{
ThrowHelper.ThrowArgumentException_InvalidTypeWithPointersNotSupported(typeof(TTo));
}
int newLength = checked ((int)((long)source.Length * Unsafe.SizeOf <TFrom>() / Unsafe.SizeOf <TTo>()));
return(new Span <TTo>(Unsafe.As <Pinnable <TTo> >(source.Pinnable), source.ByteOffset, newLength));
}