public static void WriteIntBlock(BufferedWriter writer, int[] values, int length)
{
int byteLength = 4 * length;
writer.EnsureSpace(byteLength);
Buffer.BlockCopy(values, 0, writer.Buffer, writer.Index, byteLength);
writer.Index += byteLength;
}
public static void Write(this BufferedWriter writer, int value)
{
writer.EnsureSpace(4);
writer.Buffer[writer.Index + 0] = (byte)value;
writer.Buffer[writer.Index + 1] = (byte)(value >> 8);
writer.Buffer[writer.Index + 2] = (byte)(value >> 16);
writer.Buffer[writer.Index + 3] = (byte)(value >> 24);
writer.Index += 4;
}
/// <summary>
/// Write value as a fixed length, 7-bit encoded integer.
/// All bytes start with a zero bit.
/// </summary>
/// <param name="value">Value to write</param>
/// <param name="length">Byte length to write</param>
/// <param name="writer">BufferedWriter to write to</param>
public static void WriteSevenBitFixed(BufferedWriter writer, ulong value, int length)
{
writer.EnsureSpace(length);
for (int i = 0; i < length; ++i)
{
writer.Buffer[writer.Index++] = (byte)(value & 0x7F);
value = value >> 7;
}
}
public NumberBlockWriter(BufferedWriter writer, int blockSize)
{
if (blockSize % 4 != 0)
{
throw new ArgumentException("blockSize must be a multiple of 4.");
}
BlockSize = blockSize;
_writer = writer;
_buffer = new int[blockSize];
_bufferCount = 0;
}
/// <summary>
/// Write value as a variable length, 6-bit encoded integer.
/// All bytes start with a zero bit. The last byte starts with
/// 01, the others start with 00.
/// </summary>
/// <param name="value">Value to write</param>
/// <param name="writer">BufferedWriter to write to</param>
public static void WriteSixBitTerminated(BufferedWriter writer, ulong value)
{
writer.EnsureSpace(11);
while (value > 0x3F)
{
writer.Buffer[writer.Index++] = (byte)(value & 0x3F);
value = value >> 6;
}
writer.Buffer[writer.Index++] = (byte)(value | 0x40);
}
/// <summary>
/// Write value as a variable length, 7-bit encoded integer.
/// The last byte has a leading one bit, the others don't.
/// </summary>
/// <param name="value">Value to write</param>
/// <param name="writer">BufferedWriter to write to</param>
public static void WriteSevenBitTerminated(BufferedWriter writer, ulong value)
{
writer.EnsureSpace(10);
while (value > 0x7F)
{
writer.Buffer[writer.Index++] = (byte)(value & 0x7F);
value = value >> 7;
}
writer.Buffer[writer.Index++] = (byte)(value | 0x80);
}
/// <summary>
/// Write value as a variable length, 7-bit encoded integer.
/// All bytes begin with a 0 bit.
/// The length is returned separately and must be known to read.
/// </summary>
/// <param name="value">Value to write</param>
/// <param name="writer">BufferedWriter to write to</param>
public static byte WriteSevenBitExplicit(BufferedWriter writer, ulong value)
{
writer.EnsureSpace(10);
int start = writer.Index;
while (value > 0x7F)
{
writer.Buffer[writer.Index++] = (byte)(value & 0x7F);
value = value >> 7;
}
writer.Buffer[writer.Index++] = (byte)(value);
return((byte)(writer.Index - start));
}
public void Dispose()
{
_writer?.Dispose();
_writer = null;
}