public long CopyTo(long sourceOffset, OracleLob destination, long destinationOffset, long amount)
{
this.AssertInternalLobIsValid();
if (destination == null)
{
throw System.Data.Common.ADP.ArgumentNull("destination");
}
if (destination.IsNull)
{
throw System.Data.Common.ADP.LobWriteInvalidOnNull();
}
if (this._lob.IsNull)
{
return 0L;
}
this._lob.AssertConnectionIsOpen();
this._lob.AssertAmountIsValid(amount, "amount");
this._lob.AssertAmountIsValid(sourceOffset, "sourceOffset");
this._lob.AssertAmountIsValid(destinationOffset, "destinationOffset");
this._lob.AssertTransactionExists();
long num = Math.Min(this.Length - sourceOffset, amount);
long num4 = destinationOffset + 1L;
long num3 = sourceOffset + 1L;
if (0L >= num)
{
return 0L;
}
int rc = TracedNativeMethods.OCILobLoadFromFile(this.ServiceContextHandle, this.ErrorHandle, destination.Descriptor, this.Descriptor, (uint) num, (uint) num4, (uint) num3);
if (rc != 0)
{
this.Connection.CheckError(this.ErrorHandle, rc);
}
return num;
}
/// <include file='doc\OracleBFile.uex' path='docs/doc[@for="OracleBFile.CopyTo3"]/*' />
public long CopyTo(
long sourceOffset,
OracleLob destination,
long destinationOffset,
long amount
)
{
// Copies a range of elements from the lob to a compatible lob, starting at the specified index of the target array.
AssertInternalLobIsValid();
if (null == destination)
{
throw ADP.ArgumentNull("destination");
}
if (destination.IsNull)
{
throw ADP.LobWriteInvalidOnNull();
}
if (_lob.IsNull)
{
return(0);
}
_lob.AssertConnectionIsOpen();
_lob.AssertAmountIsValid(amount, "amount");
_lob.AssertAmountIsValid(sourceOffset, "sourceOffset");
_lob.AssertAmountIsValid(destinationOffset, "destinationOffset");
_lob.AssertTransactionExists();
int rc;
_lob.EnsureBuffering(false);
destination.EnsureBuffering(false);
long dataCount = Math.Min(Length - sourceOffset, amount);
long dstOffset = destinationOffset + 1; // Oracle is 1 based, we are zero based.
long srcOffset = sourceOffset + 1; // Oracle is 1 based, we are zero based.
if (0 >= dataCount)
{
return(0);
}
rc = TracedNativeMethods.OCILobLoadFromFile(
ServiceContextHandle,
ErrorHandle,
destination.Descriptor,
Descriptor,
(UInt32)dataCount,
(UInt32)dstOffset,
(UInt32)srcOffset
);
if (0 != rc)
{
Connection.CheckError(ErrorHandle, rc);
}
// DEVNOTE: Oracle must not do partial copies, because their API doesn't tell you how many bytes were copied.
return(dataCount);
}