/// <summary>
/// Read the next bytes from the reader as a variable length,
/// 7-bit encoded integer.
/// </summary>
/// <param name="reader">BufferedReader to read from</param>
/// <returns>Value read</returns>
public static ulong ReadSevenBitTerminated(BufferedReader reader)
{
reader.EnsureSpace(10);
ulong value = 0;
int current = 0, shift = 0;
while (current <= 0x7F)
{
current = reader.Buffer[reader.Index++];
value += (ulong)(current & 0x7F) << shift;
shift += 7;
}
return(value);
}
/// <summary>
/// Read the next bytes from the reader as a variable length,
/// 6-bit encoded integer.
/// </summary>
/// <param name="reader">BufferedReader to read from</param>
/// <returns>Value read</returns>
public static int ReadSixBitTerminatedBlock(BufferedReader reader, ulong[] block)
{
reader.EnsureSpace(block.Length * 11);
int index = 0;
while (index < block.Length && !reader.EndOfStream)
{
ulong value = 0;
int current = 0, shift = 0;
while (current <= 0x3F)
{
current = reader.Buffer[reader.Index++];
value += (ulong)(current & 0x3F) << shift;
shift += 6;
}
block[index++] = value;
}
return(index);
}
public void Dispose()
{
_reader?.Dispose();
_reader = null;
}
/// <summary>
/// Construct a BufferedReader to read a String8 value.
/// </summary>
/// <param name="text">String8 to read</param>
/// <returns>BufferedReader reading String8 value only</returns>
public static BufferedReader FromString(String8 text)
{
return(BufferedReader.FromArray(text.Array, text.Index, text.Length));
}
