internal static int GetChars(NativeBuffer buffer, int valueOffset, int lengthOffset, MetaType metaType, OracleConnection connection, bool boundAsUCS2, int sourceOffset, char[] destinationBuffer, int destinationOffset, int charCount)
{
bool success = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
buffer.DangerousAddRef(ref success);
if (boundAsUCS2)
{
if (!metaType.IsLong)
{
Marshal.Copy(buffer.DangerousGetDataPtrWithBaseOffset(valueOffset + (System.Data.Common.ADP.CharSize * sourceOffset)), destinationBuffer, destinationOffset, charCount);
return(charCount);
}
NativeBuffer_LongColumnData.CopyOutOfLineChars(buffer.ReadIntPtr(valueOffset), sourceOffset, destinationBuffer, destinationOffset, charCount);
return(charCount);
}
string str = MarshalToString(buffer, valueOffset, lengthOffset, metaType, connection, boundAsUCS2, false);
int length = str.Length;
int num = ((sourceOffset + charCount) > length) ? (length - sourceOffset) : charCount;
Buffer.BlockCopy(str.ToCharArray(sourceOffset, num), 0, destinationBuffer, destinationOffset * System.Data.Common.ADP.CharSize, num * System.Data.Common.ADP.CharSize);
charCount = num;
}
finally
{
if (success)
{
buffer.DangerousRelease();
}
}
return(charCount);
}
internal void GetNames()
{
this._lob.AssertConnectionIsOpen();
short num5 = this.Connection.EnvironmentHandle.IsUnicode ? ((short) 2) : ((short) 1);
ushort num = (ushort) (30 * num5);
int offset = num;
ushort num3 = (ushort) (0xff * num5);
NativeBuffer scratchBuffer = this.Connection.GetScratchBuffer(num + num3);
bool success = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
scratchBuffer.DangerousAddRef(ref success);
int rc = TracedNativeMethods.OCILobFileGetName(this.Connection.EnvironmentHandle, this.ErrorHandle, this.Descriptor, scratchBuffer.DangerousGetDataPtr(), ref num, scratchBuffer.DangerousGetDataPtr(offset), ref num3);
if (rc != 0)
{
this.Connection.CheckError(this.ErrorHandle, rc);
}
this._directoryAlias = this.Connection.GetString(scratchBuffer.ReadBytes(0, num));
this._fileName = this.Connection.GetString(scratchBuffer.ReadBytes(offset, num3));
}
finally
{
if (success)
{
scratchBuffer.DangerousRelease();
}
}
}
internal static OracleString GetPersistedRowid(OracleConnection connection, OciRowidDescriptor rowidHandle)
{
OracleString @null = OracleString.Null;
if (rowidHandle != null)
{
OciErrorHandle errorHandle = connection.ErrorHandle;
NativeBuffer scratchBuffer = connection.GetScratchBuffer(0xf82);
bool success = false;
bool flag = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
int num;
scratchBuffer.DangerousAddRef(ref success);
if (OCI.ClientVersionAtLeastOracle9i)
{
int length = scratchBuffer.Length;
num = TracedNativeMethods.OCIRowidToChar(rowidHandle, scratchBuffer, ref length, errorHandle);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
return(new OracleString(scratchBuffer.PtrToStringAnsi(0, length)));
}
rowidHandle.DangerousAddRef(ref flag);
OciServiceContextHandle serviceContextHandle = connection.ServiceContextHandle;
OciStatementHandle stmtp = new OciStatementHandle(serviceContextHandle);
string stmt = "begin :rowid := :rdesc; end;";
int offset = 0;
int num6 = 4;
int num5 = 8;
int num3 = 12;
int num2 = 0x10;
int num4 = 20;
try
{
IntPtr ptr;
IntPtr ptr2;
num = TracedNativeMethods.OCIStmtPrepare(stmtp, errorHandle, stmt, OCI.SYNTAX.OCI_NTV_SYNTAX, OCI.MODE.OCI_DEFAULT, connection);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
scratchBuffer.WriteIntPtr(num5, rowidHandle.DangerousGetHandle());
scratchBuffer.WriteInt32(offset, 0);
scratchBuffer.WriteInt32(num6, 4);
scratchBuffer.WriteInt32(num3, 0);
scratchBuffer.WriteInt32(num2, 0xf6e);
num = TracedNativeMethods.OCIBindByName(stmtp, out ptr2, errorHandle, "rowid", 5, scratchBuffer.DangerousGetDataPtr(num4), 0xf6e, OCI.DATATYPE.VARCHAR2, scratchBuffer.DangerousGetDataPtr(num3), scratchBuffer.DangerousGetDataPtr(num2), OCI.MODE.OCI_DEFAULT);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
num = TracedNativeMethods.OCIBindByName(stmtp, out ptr, errorHandle, "rdesc", 5, scratchBuffer.DangerousGetDataPtr(num5), 4, OCI.DATATYPE.ROWID_DESC, scratchBuffer.DangerousGetDataPtr(offset), scratchBuffer.DangerousGetDataPtr(num6), OCI.MODE.OCI_DEFAULT);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
num = TracedNativeMethods.OCIStmtExecute(serviceContextHandle, stmtp, errorHandle, 1, OCI.MODE.OCI_DEFAULT);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
if (scratchBuffer.ReadInt16(num3) == -1)
{
return(@null);
}
@null = new OracleString(scratchBuffer, num4, num2, MetaType.GetMetaTypeForType(OracleType.RowId), connection, false, true);
GC.KeepAlive(rowidHandle);
}
finally
{
OciHandle.SafeDispose(ref stmtp);
}
}
finally
{
if (flag)
{
rowidHandle.DangerousRelease();
}
if (success)
{
scratchBuffer.DangerousRelease();
}
}
}
return(@null);
}