public unsafe void SizePrefixTest()
{
BitStreamer bs = new BitStreamer();
bs.ResetWrite(64);
bs.ReserveSizePrefix();
Assert.AreEqual(4, bs.ByteOffset);
// Write some random data.
var bits = 32;
for (int i = 0; i < 8; i++)
{
bs.WriteInt32(i + 1, 7);
bits += 7;
}
Assert.AreEqual(bits, bs.BitOffset);
int bytesUsed = bs.BytesUsed;
// Prefix the size and make sure the offset remains unchanged.
Assert.AreEqual(bytesUsed, bs.PrefixSize());
Assert.AreEqual(bits, bs.BitOffset);
var newbs = new BitStreamer();
newbs.ResetRead(bs.Buffer, bs.ByteLength, false);
// Read the length of the buffer.
// Must be read as uint due to Zig/Zagging of int value.
Assert.AreEqual(bytesUsed, newbs.ReadUInt32());
for (int i = 0; i < 8; i++)
{
Assert.AreEqual(i + 1, newbs.ReadInt32(7));
}
Assert.AreEqual(bs.BitOffset, newbs.BitOffset);
}