Exemplo n.º 1
0
        public object parseField(int type, int ofs, int len, TableField field, RandomAccess ra)
        {
            ra.jumpAbs(ofs);
            switch (type)
            {
            case 1:
                // byte
                assertEqual(1, len);
                return(ra.leByte());

            case 2:
                // short
                assertEqual(2, len);
                return(ra.leShort());

            case 3:
                // unsigned short
                assertEqual(2, len);
                return(ra.leUShort());

            case 4:
                // Date, mask encoded.
                long date = ra.leULong();
                if (date != 0)
                {
                    long years  = (date & 0xFFFF0000) >> 16;
                    long months = (date & 0x0000FF00) >> 8;
                    long days   = (date & 0x000000FF);
                    return(new DateTime((int)years, (int)months, (int)days));
                }
                else
                {
                    return(null);
                }

            case 5:
                //
                // Time, mask encoded.
                // So far i've only had values with hours and minutes
                // but no seconds or milliseconds so I've no way of
                // knowing how to decode these.
                //
                //TODO: Fix the time here based on decaseconds
                int time  = ra.leLong();
                int mins  = (time & 0x00FF0000) >> 16;
                int hours = (time & 0x7F000000) >> 24;
                //
                return(hours + " " + mins);            //

            case 6:
                // Long
                assertEqual(4, len);
                return(ra.leLong());

            case 7:
                // Unsigned Long
                assertEqual(4, len);
                return(ra.leULong());

            case 8:
                // Float
                assertEqual(4, len);
                return(ra.leFloat());

            case 9:
                // Double
                assertEqual(8, len);
                return(ra.leDouble());

            case 0x0A:
                // BCD encoded.
                return(ra.binaryCodedDecimal(len, field.BcdLengthOfElement, field.BcdDigitsAfterDecimalPoint));

            case 0x12:
                // Fixed Length String
                return(ra.fixedLengthString(len));

            case 0x13:
                return(ra.zeroTerminatedString());

            case 0x14:
                return(ra.pascalString());

            case 0x16:
                // Group (an overlay on top of existing data, can be anything).
                return(ra.leBytes(len));

            default:
                throw new Exception("Unsupported type " + type + " (" + len + ")");
            }
        }