// A method to copy the contents of a buffer to the our native buffer.
// This isn't optimised, so it's simple and readable.
private void Write(Span <byte> data, bool resized)
{
while (true)
{
var dataLen = data.Length;
if (!_allocated)
{
// If the buffer isn't allocated then go and do that
_value = Native.Alloc(new UIntPtr((uint)dataLen));
_allocated = true;
resized = true;
continue;
}
// If the buffer is allocated, make sure it has enough space
var available = (int)_value.cap - (int)_value.len;
if (dataLen > available)
{
// If there isn't enough space, resize and try write again
if (resized)
{
throw new Exception("Already tried to resize ResizeBuf");
}
var needed = dataLen - available;
_value = Native.Reserve(_value, new UIntPtr((uint)needed));
resized = true;
continue;
}
// If the buffer is allocated and there's space, then copy the bits
Span <byte> slice;
slice = ValueSpan().Slice((int)_value.len);
data.CopyTo(slice);
_value.len += dataLen;
break;
}
}
internal static extern ResizeBuf Reserve(ResizeBuf buf, UIntPtr reserve);
internal static extern void Drop(ResizeBuf buf);