internal static ulong?ReadUInt64WrapperSlow(ref ReadOnlySpan <byte> buffer, ref ParserInternalState state)
{
// field=1, type=varint = tag of 8
const int expectedTag = 8;
int length = ParsingPrimitives.ParseLength(ref buffer, ref state);
if (length == 0)
{
return(0L);
}
int finalBufferPos = state.totalBytesRetired + state.bufferPos + length;
ulong result = 0L;
do
{
if (ParsingPrimitives.ParseTag(ref buffer, ref state) == expectedTag)
{
result = ParsingPrimitives.ParseRawVarint64(ref buffer, ref state);
}
else
{
ParsingPrimitivesMessages.SkipLastField(ref buffer, ref state);
}
}while (state.totalBytesRetired + state.bufferPos < finalBufferPos);
return(result);
}
internal static ulong?ReadUInt64Wrapper(ref ReadOnlySpan <byte> buffer, ref ParserInternalState state)
{
// field=1, type=varint = tag of 8
const int expectedTag = 8;
// length:1 + tag:1 + value:10(varint64-max) = 12 bytes
if (state.bufferPos + 12 <= state.bufferSize)
{
// The entire wrapper message is already contained in `buffer`.
int pos0 = state.bufferPos;
int length = buffer[state.bufferPos++];
if (length == 0)
{
return(0L);
}
// Length will always fit in a single byte.
if (length >= 128)
{
state.bufferPos = pos0;
return(ReadUInt64WrapperSlow(ref buffer, ref state));
}
int finalBufferPos = state.bufferPos + length;
if (buffer[state.bufferPos++] != expectedTag)
{
state.bufferPos = pos0;
return(ReadUInt64WrapperSlow(ref buffer, ref state));
}
var result = ParsingPrimitives.ParseRawVarint64(ref buffer, ref state);
// Verify this message only contained a single field.
if (state.bufferPos != finalBufferPos)
{
state.bufferPos = pos0;
return(ReadUInt64WrapperSlow(ref buffer, ref state));
}
return(result);
}
else
{
return(ReadUInt64WrapperSlow(ref buffer, ref state));
}
}
/// <summary>
/// Reads a raw varint from the stream.
/// </summary>
internal ulong ReadRawVarint64()
{
var span = new ReadOnlySpan <byte>(buffer);
return(ParsingPrimitives.ParseRawVarint64(ref span, ref state));
}
public long ReadSInt64()
{
return(ParsingPrimitives.DecodeZigZag64(ParsingPrimitives.ParseRawVarint64(ref buffer, ref state)));
}
public bool ReadBool()
{
return(ParsingPrimitives.ParseRawVarint64(ref buffer, ref state) != 0);
}
public long ReadInt64()
{
return((long)ParsingPrimitives.ParseRawVarint64(ref buffer, ref state));
}