public static MasterTable Open(string databasePath, string tableName, FieldInfo[] info)
{
MasterTable table = new MasterTable();
table.Fields = info;
table.file = SequentialFile.Open(string.Format(@"{0}\{1}.mst", databasePath, tableName));
return table;
}
private static int CalculateRecordLength(FieldInfo[] fields)
{
int recLen = 1; //first byte contains IsDeleted flag
foreach (FieldInfo field in fields)
{
recLen += field.ByteLength;
}
return recLen;
}
public static DataTable Create(string databasePath, string tableName, FieldInfo[] info)
{
DataTable table = new DataTable();
int recordLength = 0;
//calculate record length
recordLength = CalculateRecordLength(info);
//create file to store data in
table.Fields = info;
table.file = SequentialFile.Create(string.Format(@"{0}\{1}.dat", databasePath, tableName), recordLength);
//return reference to new table
return table;
}
public static MasterTable Create(string databasePath, string tableName, FieldInfo[] info)
{
MasterTable table = new MasterTable();
int recordLength = 0;
//calculate record length
foreach (FieldInfo field in info)
{
recordLength += field.ByteLength;
}
//create file to store data in
table.Fields = info;
table.file = SequentialFile.Create(string.Format(@"{0}\{1}.mst", databasePath, tableName), recordLength);
//return reference to new table
return table;
}
public static Record FromBytes(byte[] bytes, FieldInfo[] fields)
{
//init
int byteOffset = 0;
Record record = new Record();
record.Data = new object[fields.Length];
//get IsDeleted byte
record.IsDeleted = BitConverter.ToBoolean(bytes, byteOffset);
byteOffset += 1;
//get data for all fields
for(int i=0; i < fields.Length; i++)
{
//DataType type = fields[i].Type;
//int byteLen = fields[i].ByteLength;
//int Len = fields[i].Length;
//if (type == DataType.Boolean)
//{
// record.Data[i] = BitConverter.ToBoolean(bytes, byteOffset);
// byteOffset += byteLen;
// }
//else if (type == DataType.Integer)
//{
// record.Data[i] = BitConverter.ToInt32(bytes, byteOffset);
// byteOffset += byteLen;
//}
//else if (type == DataType.Text)
//{
// StringBuilder sb = new StringBuilder(Len);
// Encoding.UTF32.
// = BitConverter.ToBoolean(bytes, byteOffset);
// byteOffset += byteLen;
//}
//else
//{
//}
}
//return record to caller
return record;
}
static void Main(string[] args)
{
FieldInfo[] fieldMasterFields = new FieldInfo[4];
FieldInfo[] objectMasterFields = new FieldInfo[3];
fieldMasterFields[0] = new FieldInfo("Table", DataType.Text, 128);
fieldMasterFields[1] = new FieldInfo("Name", DataType.Text, 128);
fieldMasterFields[2] = new FieldInfo("Type", DataType.Text, 128);
fieldMasterFields[3] = new FieldInfo("Length", DataType.Integer, 1);
objectMasterFields[0] = new FieldInfo("Name", DataType.Text, 128);
objectMasterFields[1] = new FieldInfo("Type", DataType.Text, 128);
objectMasterFields[2] = new FieldInfo("Name", DataType.Text, 128);
MasterTable fieldMaster = MasterTable.Create(@".\data", "fields", fieldMasterFields);
MasterTable objectMaster = MasterTable.Create(@".\data", "objects", objectMasterFields);
DataTable heroes = DataTable.Create(@".\data", "heroes", fieldMasterFields);
DataTable villans = DataTable.Create(@".\data", "villans", objectMasterFields);
}
