private void WriteHeader(Stream stream, bool withColumns)
{
mDbfHeader.NbRecords = (UInt32)mRecordCount;
UInt16 newHeaderWith = (UInt16)(mDbfHeaderWriter.RecordWidth + (mColumns.Count - 1) * mDbfColumnWriter.RecordWidth + 1);
mDbfHeader.HeaderWidth = newHeaderWith;
mHeaderWidth = newHeaderWith;
Byte[] headerBuff = new byte[mDbfHeaderWriter.RecordWidth];
mDbfHeaderWriter.Write(this, headerBuff, mDbfHeader);
stream.Seek(0, SeekOrigin.Begin);
stream.Write(headerBuff, 0, headerBuff.Length);
#if DUMP_DISK_ACTIVITY
System.Diagnostics.Debug.WriteLine(mOriginalFile + " WriteHeader");
System.Diagnostics.Debug.WriteLine(Utils.HexDump(headerBuff));
#endif
if (withColumns)
{
Byte[] columnHeaderBuff = new byte[mDbfColumnWriter.RecordWidth];
DbfColumnHeader dbfColumnHeader = new DbfColumnHeader();
// we ignore column 0
for (int i = 1; i < mColumns.Count; i++)
{
ColumnDefinition c = mColumns[i];
dbfColumnHeader.ColumnName = c.mColumnName;
dbfColumnHeader.ColumnType = c.DbfColumnType;
dbfColumnHeader.ColumnWidth = (byte)c.mWidth;
dbfColumnHeader.Decimals = (byte)c.mDecimals;
mDbfColumnWriter.Write(this, columnHeaderBuff, dbfColumnHeader);
stream.Write(columnHeaderBuff, 0, columnHeaderBuff.Length);
#if DUMP_DISK_ACTIVITY
System.Diagnostics.Debug.WriteLine(mOriginalFile + " WriteColumn #" + i);
System.Diagnostics.Debug.WriteLine(Utils.HexDump(columnHeaderBuff));
#endif
}
stream.WriteByte(END_OF_COLUMN_DEFINITIONS);
}
base.mCurrentRecordNoPosition = UInt32.MaxValue;
}
protected override void OnInitialize(Stream stream)
{
Byte[] headerBuff = new byte[mDbfHeaderWriter.RecordWidth];
mDbfHeader = new DbfHeader();
int read = stream.Read(headerBuff, 0, headerBuff.Length);
if (read > 0)
{
mDbfHeaderWriter.Read(this, headerBuff, mDbfHeader);
//File size reported by the operating system must match the logical file size. Logical file size = ( Length of header + ( Number of records * Length of each record ) )
//mHeaderSerializer.mQuickWriteMethod(this, headerBuff, header);
var nbColumns = ((mDbfHeader.HeaderWidth - mDbfHeaderWriter.RecordWidth) / mDbfColumnWriter.RecordWidth) + 1;
var totalLength = stream.Length;
mRecordWidth = mDbfHeader.RecordWidth;
var recordsLength = totalLength - mDbfHeader.HeaderWidth;
if (mRecordWidth > 0)
{
var columns = new List <ColumnDefinition>(nbColumns);
mRecordCount = (UInt32)(recordsLength / mRecordWidth);
Byte[] columnHeaderBuff = new byte[mDbfColumnWriter.RecordWidth];
DbfColumnHeader dbfColumnHeader = new DbfColumnHeader();
ColumnDefinition columnDefinition = null;
//new ColumnDefinition();
//columnDefinition.Initialize(DbfVersion.dBaseIII, 0, typeof(DbfRecord).GetField("DeletedFlag",
// BindingFlags.Instance
// | BindingFlags.Public
// | BindingFlags.NonPublic
// | BindingFlags.DeclaredOnly), 0, null);
//columns.Add(columnDefinition);
for (int i = 1; i < nbColumns; i++)
{
read = stream.Read(columnHeaderBuff, 0, columnHeaderBuff.Length);
mDbfColumnWriter.Read(this, columnHeaderBuff, dbfColumnHeader);
System.Diagnostics.Trace.WriteLine(string.Format("{0},{1},{2},{3}",
dbfColumnHeader.ColumnName,
dbfColumnHeader.ColumnType,
dbfColumnHeader.ColumnWidth,
dbfColumnHeader.Decimals));
columnDefinition = new ColumnDefinition();
columnDefinition.Initialize(dbfColumnHeader.ColumnName, dbfColumnHeader.ColumnType, dbfColumnHeader.ColumnWidth, dbfColumnHeader.Decimals);
columns.Add(columnDefinition);
}
int lastByte = stream.ReadByte();
if (lastByte == END_OF_COLUMN_DEFINITIONS)
{
mColumns = columns;
mHeaderWidth = mDbfHeader.HeaderWidth;
}
}
}
mRecordWriter = new QuickSerializer(
typeof(TRecord),
mVersion,
mColumns,
mRecordWidth,
false,
true);
if (mColumns == null)
{
mColumns = mRecordWriter.Columns;
mRecordWidth = mRecordWriter.RecordWidth;
mDbfHeader.VerNumber = 131;
mDbfHeader.LastUpdate = DateTime.Now;
mDbfHeader.NbRecords = 0;
var nbColumns = mColumns.Count;
mDbfHeader.HeaderWidth = (UInt16)(mDbfHeaderWriter.RecordWidth + mDbfColumnWriter.RecordWidth * nbColumns + 1);
mDbfHeader.RecordWidth = (UInt16)mRecordWriter.RecordWidth;
mDbfHeader.Zero = 0;
mDbfHeader.IncompleteTransaction = 0;
mDbfHeader.EncryptionFlag = 0;
//mDbfHeader.LanOnly = [];
mDbfHeader.Indexed = 0;
mDbfHeader.Language = 0;
mDbfHeader.Zero2 = 0;
WriteHeader(stream, /*withColumns*/ true);
}
}
