public int ReadProtobufVarInt()
{
var availableBits = BitsInBuffer + (SLED * 8) - Offset;
// Start by overflowingly reading 32 bits.
// Reading beyond the buffer contents is safe in this case,
// because the sled ensures that we stay inside of the buffer.
var buf = PeekInt(32, true);
// always take the first bytes; others if necessary
var result = buf & MSK_1;
BitStreamUtil.AssertMaxBits(availableBits, 1 * 8);
if ((buf & MSB_1) != 0)
{
result |= (buf & MSK_2) >> 1;
BitStreamUtil.AssertMaxBits(availableBits, 1 * 8);
if ((buf & MSB_2) != 0)
{
result |= (buf & MSK_3) >> 2;
BitStreamUtil.AssertMaxBits(availableBits, 2 * 8);
if ((buf & MSB_3) != 0)
{
result |= (buf & MSK_4) >> 3;
BitStreamUtil.AssertMaxBits(availableBits, 3 * 8);
if ((buf & MSB_4) != 0)
{
// dammit, it's too large (probably negative)
// fall back to the slow implementation, that's rare
return(BitStreamUtil.ReadProtobufVarIntStub(this));
}
if (TryAdvance(4 * 8))
{
RefillBuffer();
}
}
else if (TryAdvance(3 * 8))
{
RefillBuffer();
}
}
else if (TryAdvance(2 * 8))
{
RefillBuffer();
}
}
else if (TryAdvance(1 * 8))
{
RefillBuffer();
}
return(unchecked ((int)result));
}
public int ReadProtobufVarInt()
{
return(BitStreamUtil.ReadProtobufVarIntStub(this));
}