AppendInt64 appends an int64 to the slice.

AppendInt64 appends an int64 to the slice.

ReadInt64Bytes tries to read an int64 from 'b' and return the value and the remaining bytes.

ReadUint64Bytes tries to read a uint64 from 'b' and return the value and the remaining bytes.

UvarintSize returns the size (in bytes) of `num` encoded as a unsigned varint.