public TableField(ref RandomAccess ra)
{
_fieldType = ra.leByte();
_offset = ra.leShort();
_fieldName = ra.zeroTerminatedString();
//remove the table name from the start if it is there
if (_fieldName.IndexOf(':') > 0)
{
_fieldName = _fieldName.Substring(_fieldName.IndexOf(':') + 1);
}
_elements = ra.leShort();
_length = ra.leShort();
_flags = ra.leShort();
_index = ra.leShort();
switch (_fieldType)
{
case 0x0a:
_bcdDigitsAfterDecimalPoint = ra.leByte();
_bcdLengthOfElement = ra.leByte();
break;
case 0x12:
case 0x13:
case 0x14:
_stringLength = ra.leShort();
_stringMask = ra.zeroTerminatedString();
if (_stringMask.Length == 0)
{
ra.leByte();
}
break;
}
}
public TableMemo(ref RandomAccess ra)
{
_externalFile = ra.zeroTerminatedString();
if (_externalFile.Length == 0)
{
if (ra.leByte() != 1)
{
throw new Exception("Bad Memo Definition, missing 0x01 after zero string:" + _externalFile);
}
}
_name = ra.zeroTerminatedString();
_length = ra.leShort();
_flags = ra.leShort();
}
public TableIndex(ref RandomAccess ra)
{
_externalFile = ra.zeroTerminatedString();
if (_externalFile.Length == 0)
{
int read = ra.leByte();
if (read != 1)
{
throw new Exception("Bad Index Definition, missing 0x01 after zero string (" + ra.toHex2(read) + ")");
}
}
_name = ra.zeroTerminatedString();
_flags = ra.leByte();
_fieldsInKey = ra.leShort();
_keyField = new int[_fieldsInKey];
_keyFieldFlag = new int[_fieldsInKey];
for (int t = 0; t < _fieldsInKey; t++)
{
_keyField[t] = ra.leShort();
_keyFieldFlag[t] = ra.leShort();
}
}
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 + ")");
}
}
