private void TestEncodeDecodeMinDelta32 <T>(int count, Func <int, T[]> factory, int shift, int skip)
where T : unmanaged
{
var chunk = factory(count);
var result = new T[count];
var size = CodecExt.GetMaxEncodedSizeForMinDelta32(chunk.Length);
var buffer = new UnsafeBuffer(size);
// Copy partial data
if (skip > 0)
{
fixed(T *src = chunk)
fixed(T * dst = result)
{
Extensions.CopyBlock((byte *)src, (byte *)dst, count * sizeof(T), skip, sizeof(T) - skip);
}
}
fixed(T *p = chunk)
{
var dst = buffer.Ptr;
CodecExt.EncodeMinDelta32((byte *)p + shift, count * sizeof(T) - shift, skip, ref dst);
}
fixed(T *p = result)
{
var src = buffer.Ptr;
CodecExt.DecodeMinDelta32(ref src, skip, (byte *)p + shift);
}
chunk.IsEqualTo(result);
}
public int Decode(byte *src, int len, Int32Entry *dst)
{
var count = *(int *)src;
src += sizeof(int);
// Decodes header
CodecExt.DecodeMinDeltaU64(ref src, sizeof(int), (byte *)dst);
CodecExt.DecodeMinDelta32(ref src, sizeof(long), (byte *)(dst + sizeof(long)));
return(count);
}