public unsafe bool Apply(ReadOnlySpan <byte> src, ref Span <byte> dst)
{
if (dst.Length <= src.Length + 1)
return(false);
fixed(byte *srcPtr = src, dstPtr = dst)
{
var count = CLZF2.TryCompress(srcPtr, dstPtr + 1, src.Length, src.Length);
if (count <= 0 || count >= src.Length)
{
// Compression failed. Prepend header and send.
*dstPtr = kHeaderUncompressed;
UnsafeUtility.MemCpy(dstPtr + 1, srcPtr, src.Length);
count = src.Length;
}
else
{
// Compression succeeded. Prepend header and send.
if (count + 1 < dst.Length)
{
return(false);
}
Assert.IsTrue(count + 1 <= dst.Length);
*dstPtr = kHeaderCompresssed;
}
dst = dst.Slice(0, count + 1);
}
return(true);
}
public unsafe void Apply(ref byte[] data, ref int size)
{
Assert.IsTrue(data.Length >= size);
fixed(byte *ptr = data)
{
var temp = stackalloc byte[size + 1];
var count = CLZF2.TryCompress(ptr, temp + 1, size, size);
if (count <= 0 || count >= size)
{
// Compression failed. Prepend header and send.
if (size + 1 >= data.Length)
{
var pool = ArrayPool <byte> .Shared;
var tempBuf = pool.Rent(size + 1);
fixed(byte *outPtr = tempBuf)
{
UnsafeUtility.MemCpy(outPtr + 1, ptr, size);
*outPtr = kHeaderUncompressed;
}
pool.Return(data);
data = tempBuf;
}
else
{
UnsafeUtility.MemMove(ptr + 1, ptr, size);
*ptr = kHeaderUncompressed;
}
size++;
}
else
{
// Compression failed. Prepend header and send.
Assert.IsTrue(count <= data.Length);
*temp = kHeaderCompresssed;
UnsafeUtility.MemCpy(ptr, temp, count + 1);
size = count + 1;
}
}
}
