public IList <DbfColumn> ReadColumns(Stream stream)
{
var count = Header.HeaderLength - DbfHeader.DbfHeaderSize;
var buffer = new byte[count];
stream.Read(buffer, 0, count);
var span = new ReadOnlySpan <byte>(buffer);
var columns = new List <DbfColumn>();
var start = 0;
var startField = 1;
var ordinal = 0;
while (span[start] != Terminator)
{
var slice = span.Slice(start, DbfColumn.DbfColumnSize);
var column = new DbfColumn(slice, startField, ordinal, CurrentEncoding);
columns.Add(column);
ordinal++;
start = ordinal * DbfColumn.DbfColumnSize;
startField += column.Length;
}
return(columns);
}
public IList <DbfColumn> ReadColumns(BinaryReader binaryReader)
{
var columns = new List <DbfColumn>();
var ordinal = 0;
while (binaryReader.PeekChar() != Terminator)
{
var column = new DbfColumn(binaryReader, ordinal++, CurrentEncoding);
columns.Add(column);
}
var terminator = binaryReader.ReadByte();
if (terminator != Terminator)
{
throw new DbfFileFormatException();
}
return(columns);
}
private static IDbfValue CreateDbfValue(DbfColumn dbfColumn, DbfMemo memo, DbfDataReaderOptions options)
{
IDbfValue value;
switch (dbfColumn.ColumnType)
{
case DbfColumnType.Number:
if (dbfColumn.DecimalCount == 0)
{
value = new DbfValueInt(dbfColumn.Length);
}
else
{
value = new DbfValueDecimal(dbfColumn.Length, dbfColumn.DecimalCount);
}
break;
case DbfColumnType.Signedlong:
value = new DbfValueLong(dbfColumn.Length, options);
break;
case DbfColumnType.Float:
value = new DbfValueFloat(dbfColumn.Length);
break;
case DbfColumnType.Currency:
value = new DbfValueCurrency(dbfColumn.Length, dbfColumn.DecimalCount, options);
break;
case DbfColumnType.Date:
value = new DbfValueDate(dbfColumn.Length);
break;
case DbfColumnType.DateTime:
value = new DbfValueDateTime(dbfColumn.Length);
break;
case DbfColumnType.Boolean:
value = new DbfValueBoolean(dbfColumn.Length);
break;
case DbfColumnType.Memo:
value = new DbfValueMemo(dbfColumn.Length, memo);
break;
case DbfColumnType.Double:
value = new DbfValueDouble(dbfColumn.Length);
break;
case DbfColumnType.General:
case DbfColumnType.Character:
value = new DbfValueString(dbfColumn.Length);
break;
default:
value = new DbfValueNull(dbfColumn.Length);
break;
}
return(value);
}
private IDbfValue CreateDbfValue(DbfColumn dbfColumn, DbfMemo memo)
{
IDbfValue value;
switch (dbfColumn.ColumnType)
{
case DbfColumnType.Number:
if (dbfColumn.DecimalCount == 0)
{
if (dbfColumn.Length < 10)
{
value = new DbfValueInt(dbfColumn.Start, dbfColumn.Length);
}
else
{
value = new DbfValueInt64(dbfColumn.Start, dbfColumn.Length);
}
}
else
{
value = new DbfValueDecimal(dbfColumn.Start, dbfColumn.Length, dbfColumn.DecimalCount);
}
break;
case DbfColumnType.SignedLong:
value = new DbfValueLong(dbfColumn.Start, dbfColumn.Length);
break;
case DbfColumnType.Float:
value = new DbfValueFloat(dbfColumn.Start, dbfColumn.Length, dbfColumn.DecimalCount);
break;
case DbfColumnType.Currency:
value = new DbfValueCurrency(dbfColumn.Start, dbfColumn.Length, dbfColumn.DecimalCount);
break;
case DbfColumnType.Date:
value = new DbfValueDate(dbfColumn.Start, dbfColumn.Length);
break;
case DbfColumnType.DateTime:
value = new DbfValueDateTime(dbfColumn.Start, dbfColumn.Length);
break;
case DbfColumnType.Boolean:
value = new DbfValueBoolean(dbfColumn.Start, dbfColumn.Length);
break;
case DbfColumnType.Memo:
value = new DbfValueMemo(dbfColumn.Start, dbfColumn.Length, memo, _encoding);
break;
case DbfColumnType.Double:
value = new DbfValueDouble(dbfColumn.Start, dbfColumn.Length, dbfColumn.DecimalCount);
break;
case DbfColumnType.General:
case DbfColumnType.Character:
value = new DbfValueString(dbfColumn.Start, dbfColumn.Length, _encoding);
break;
default:
value = new DbfValueNull(dbfColumn.Start, dbfColumn.Length);
break;
}
return(value);
}
