Lawo.EmberPlusSharp.Ember.EmberReader.Read8Bit C# (CSharp) Méthode

        private static long Read8Bit(ReadBuffer readBuffer, int length, bool isSigned)
        {
            if (length <= 0)
            {
                throw new EmberException("Unexpected zero length for integer.");
            }

            var position = readBuffer.Position;
            var mostSignificant = readBuffer[readBuffer.Index++];
            long result;
            long leading;

            // - 1 accounts for the fact that we must not overwrite the sign bit by shifting in bits
            const int MostSignificantShift = Constants.BitsPerLong - Constants.BitsPerByte - 1;

            if (isSigned && ((mostSignificant & 0x80) != 0))
            {
                result = (Constants.AllBitsSetLong << Constants.BitsPerByte) | mostSignificant;
                leading = Constants.AllBitsSetLong << MostSignificantShift;
            }
            else
            {
                result = mostSignificant;
                leading = 0x00;
            }

            for (--length; length > 0; --length)
            {
                const long DiscardBitsMask = Constants.AllBitsSetLong << MostSignificantShift;

                if ((result & DiscardBitsMask) != leading)
                {
                    throw CreateEmberException(
                        "The integer, length or exponent at position {0} exceeds the expected range.", position);
                }

                result <<= Constants.BitsPerByte;
                result |= readBuffer[readBuffer.Index++];
            }

            return result;
        }