internal long GetChars(NativeBuffer_RowBuffer buffer, long fieldOffset, char[] destinationBuffer, int destinationOffset, int length)
{
int num;
if (length < 0)
{
throw System.Data.Common.ADP.InvalidDataLength((long)length);
}
if ((destinationOffset < 0) || ((destinationBuffer != null) && (destinationOffset >= destinationBuffer.Length)))
{
throw System.Data.Common.ADP.InvalidDestinationBufferIndex(destinationBuffer.Length, destinationOffset, "bufferoffset");
}
if ((0L > fieldOffset) || (0xffffffffL < fieldOffset))
{
throw System.Data.Common.ADP.InvalidSourceOffset("fieldOffset", 0L, 0xffffffffL);
}
if (this.IsLob)
{
System.Data.OracleClient.OracleType oracleType = this._metaType.OracleType;
if (((System.Data.OracleClient.OracleType.Clob != oracleType) && (System.Data.OracleClient.OracleType.NClob != oracleType)) && (System.Data.OracleClient.OracleType.BFile != oracleType))
{
throw System.Data.Common.ADP.InvalidCast();
}
if (this.IsDBNull(buffer))
{
throw System.Data.Common.ADP.DataReaderNoData();
}
using (OracleLob lob = new OracleLob(this._lobLocator))
{
string str = (string)lob.Value;
int maxLen = str.Length;
int startIndex = (int)fieldOffset;
if (startIndex < 0)
{
throw System.Data.Common.ADP.InvalidSourceBufferIndex(maxLen, (long)startIndex, "fieldOffset");
}
num = maxLen - startIndex;
if (destinationBuffer != null)
{
num = Math.Min(num, length);
if (0 < num)
{
Buffer.BlockCopy(str.ToCharArray(startIndex, num), 0, destinationBuffer, destinationOffset, num);
}
}
goto Label_0198;
}
}
if ((((System.Data.OracleClient.OracleType.Char != this.OracleType) && (System.Data.OracleClient.OracleType.VarChar != this.OracleType)) && ((System.Data.OracleClient.OracleType.LongVarChar != this.OracleType) && (System.Data.OracleClient.OracleType.NChar != this.OracleType))) && (System.Data.OracleClient.OracleType.NVarChar != this.OracleType))
{
throw System.Data.Common.ADP.InvalidCast();
}
if (this.IsDBNull(buffer))
{
throw System.Data.Common.ADP.DataReaderNoData();
}
this.FixupLongValueLength(buffer);
int num5 = OracleString.GetLength(buffer, this._lengthOffset, this._metaType);
int sourceOffset = (int)fieldOffset;
num = num5 - sourceOffset;
if (destinationBuffer != null)
{
num = Math.Min(num, length);
if (0 < num)
{
OracleString.GetChars(buffer, this._valueOffset, this._lengthOffset, this._metaType, this._connection, this._bindAsUTF16, sourceOffset, destinationBuffer, destinationOffset, num);
}
}
Label_0198:
return((long)Math.Max(0, num));
}
