public long readIntAsLong()

in src/com/amazon/ion/impl/IonBinary.java [1166:1213]

• 41 lines of code
• 20 McCabe index (conditional complexity)

        public long readIntAsLong(int len) throws IOException {
            long    retvalue = 0;
            boolean is_negative = false;
            int     b;

            if (len > 0) {
                // read the first byte
                if ((b = read()) < 0) throwUnexpectedEOFException();
                retvalue = (b & 0x7F);
                is_negative = ((b & 0x80) != 0);

                switch (len - 1) {  // we read 1 already
                case 8: // even after reading the 1st byte we may have 8 remaining
                        // bytes of value when the value is Long.MIN_VALUE since it
                        // has all 8 bytes for data and the ninth for the sign bit
                        // all by itself (which we read above)
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 7:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 6:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 5:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 4:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 3:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 2:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                case 1:
                    if ((b = read()) < 0) throwUnexpectedEOFException();
                    retvalue = (retvalue << 8) | b;
                default:
                }
                if (is_negative) {
                    // this is correct even when retvalue == Long.MIN_VALUE
                    retvalue = -retvalue;
                }
            }
            return retvalue;
        }