public void TestEncodeDecodeUInt64()
{
const int factor = 5;
var values = new ulong[64 * factor];
for (var i = 1; i < 64; i++)
{
var value = (ulong)Math.Pow(2, i);
values[i * 2] = value - 2;
values[i * 2 + 1] = value - 1;
values[i * 2 + 2] = value;
values[i * 2 + 3] = value + 1;
values[i * 2 + 3] = value + 2;
}
var buffer = stackalloc byte[9];
for (var i = 0; i < values.Length; i++)
{
var p = buffer;
Codec.EncodeUInt64(values[i], ref p);
p = buffer;
var value = Codec.DecodeUInt64(ref p);
Assert.AreEqual(values[i], value, "At idx: " + i);
}
}
public static void DecodeMinDeltaU64(ref byte *src, int skip, byte *dst)
{
var len = *(int *)src;
var end = src + len;
src += sizeof(int);
var next = sizeof(ulong) + skip;
*(ulong *)dst = Codec.DecodeUInt64(ref src);
var minDelta = Codec.DecodeUInt64(ref src);
dst += next;
while (src < end)
{
*(ulong *)dst = *(ulong *)(dst - next) + minDelta + Codec.DecodeUInt64(ref src);
dst += next;
}
}