/// <summary>
/// Initializes a new instance of the <see cref="OneOddSock.IO.BitStream"/> class
/// with backing <paramref name="stream"/>. The stream will be closed only if
/// <paramref name="leaveOpen"/> is false.
/// </summary>
protected BitStream(Stream stream, bool leaveOpen)
{
_baseStream = stream;
_leaveOpen = leaveOpen;
_bitBuffer = new BitRingBuffer();
_conversionBuffer = new byte[0x100];
}
/// <summary>
/// Initializes a new instance of the <see cref="OneOddSock.IO.BitStream"/> class
/// with backing <paramref name="stream"/>. The stream will be closed only if
/// <paramref name="leaveOpen"/> is false.
/// </summary>
protected BitStream(Stream stream, bool leaveOpen)
{
_baseStream = stream;
_leaveOpen = leaveOpen;
_bitBuffer = new BitRingBuffer();
_conversionBuffer = new byte[0x100];
}
public void Eight_Bits_Written()
{
var streamer = new BitRingBuffer(0x100);
for (int i = 0; i < 8; ++i)
{
streamer.Write(true);
}
Assert.AreEqual(0x100 - 1, streamer.AvailableBytes);
Assert.AreEqual(1, streamer.UsedBytes);
Assert.AreEqual(1, streamer.LengthBytes);
Assert.AreEqual(8, streamer.LengthBits);
Assert.AreEqual(0x100*8 - 8, streamer.AvailableBits);
}
public void Almost_Full()
{
var streamer = new BitRingBuffer(0x100);
for (int i = 0; i < 0x100*8 - 1; ++i)
{
streamer.Write(true);
}
Assert.AreEqual(0, streamer.AvailableBytes);
Assert.AreEqual(0x100, streamer.UsedBytes);
Assert.AreEqual(0x100 - 1, streamer.LengthBytes);
Assert.AreEqual(0x100*8 - 1, streamer.LengthBits);
Assert.AreEqual(1, streamer.AvailableBits);
}
public void EnsureIndexWrap()
{
var streamer = new BitRingBuffer(2);
streamer.Write(0x3c);
for (int i = 0; i < 7; ++i)
{
streamer.Write(true);
}
byte result = streamer.ReadByte();
Assert.AreEqual((byte) 0x3c, result);
streamer.Write(false); // End of buffer
streamer.Write(true); // Wrap
result = streamer.ReadByte();
Assert.AreEqual((byte) 0xfe, result);
Assert.AreEqual(true, streamer.ReadBoolean());
}
public void InitialState()
{
var streamer = new BitRingBuffer(0x100);
Assert.AreEqual(0x100, streamer.AvailableBytes);
Assert.AreEqual(0, streamer.UsedBytes);
Assert.AreEqual(0, streamer.LengthBytes);
Assert.AreEqual(0, streamer.LengthBits);
Assert.AreEqual(0x100*8, streamer.AvailableBits);
}
public void WriteByteArray()
{
var streamer = new BitRingBuffer(0x100);
var buffer = new byte[0x100];
for (int i = 0; i < 0x100; ++i)
{
buffer[i] = (byte) (((i + 123)*(i + 7))%256);
}
streamer.Write(buffer, 0, 0x100);
var result = new byte[0x100];
streamer.ReadBytes(result, 0, 0x100);
CollectionAssert.AreEqual(buffer, result);
}
public void TwoBits_Written()
{
var streamer = new BitRingBuffer(0x100);
streamer.Write(true);
streamer.Write(false);
Assert.AreEqual(0x100 - 1, streamer.AvailableBytes);
Assert.AreEqual(1, streamer.UsedBytes);
Assert.AreEqual(0, streamer.LengthBytes);
Assert.AreEqual(2, streamer.LengthBits);
Assert.AreEqual(0x100*8 - 2, streamer.AvailableBits);
}
public void ReadOneBit_After_Full()
{
var streamer = new BitRingBuffer(0x100);
for (int i = 0; i < 0x100*8; ++i)
{
streamer.Write(true);
}
streamer.ReadBoolean();
Assert.AreEqual(0, streamer.AvailableBytes);
Assert.AreEqual(0x100, streamer.UsedBytes);
Assert.AreEqual(0x100 - 1, streamer.LengthBytes);
Assert.AreEqual(0x100*8 - 1, streamer.LengthBits);
Assert.AreEqual(1, streamer.AvailableBits);
}
public void ReadFullBuffer_BitByBit()
{
var streamer = new BitRingBuffer(0x100);
for (int i = 0; i < 0x100*8; ++i)
{
streamer.Write((i*(i%7))%2 == 1);
}
for (int i = 0; i < 0x100*8; ++i)
{
Assert.AreEqual((i*(i%7))%2 == 1, streamer.ReadBoolean());
}
}
public void ReadByte_BitByBit()
{
byte b = 0xc7; // 11000111
var values = new[] {false, true, true, false, false, false, true, true, true};
var streamer = new BitRingBuffer(0x100);
streamer.Write(false);
streamer.Write(b);
for (int i = 0; i < 8; ++i)
{
Assert.AreEqual(values[i], streamer.ReadBoolean());
}
}
public void Overwrite_Bit()
{
var streamer = new BitRingBuffer(0x100);
for (int i = 0; i < 0x100*8 + 1; ++i)
{
streamer.Write(true);
}
}
public void Overread_Bit()
{
var streamer = new BitRingBuffer(0x100);
streamer.ReadBoolean();
}
