97 lines
2.3 KiB
C#
97 lines
2.3 KiB
C#
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//
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// OciRowIdDescriptor.cs
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//
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// Part of managed C#/.NET library System.Data.OracleClient.dll
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//
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// Part of the Mono class libraries at
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// mcs/class/System.Data.OracleClient/System.Data.OracleClient.Oci
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//
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// Assembly: System.Data.OracleClient.dll
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// Namespace: System.Data.OracleClient.Oci
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//
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// Author:
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// Tim Coleman <tim@timcoleman.com>
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// Daniel Morgan <monodanmorg@yahoo.com>
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//
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// Copyright (C) Tim Coleman, 2003
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// Copyright (C) Daniel Morgan, 2008
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//
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using System;
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using System.Data.OracleClient;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace System.Data.OracleClient.Oci {
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internal sealed class OciRowIdDescriptor : OciDescriptorHandle, IDisposable
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{
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#region Fields
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bool disposed = false;
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#endregion // Fields
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#region Constructors
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public OciRowIdDescriptor (OciHandle parent, IntPtr newHandle)
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: base (OciHandleType.RowId, parent, newHandle)
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{
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}
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#endregion // Constructors
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#region Methods
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protected override void Dispose (bool disposing)
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{
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if (!disposed) {
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disposed = true;
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base.Dispose (disposing);
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}
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}
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//FIXME: This method only exists in Oracle 9i client and above
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[DllImport ("oci")]
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static extern int OCIRowidToChar (IntPtr rowidDesc,
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IntPtr outbfp,
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ref ushort outbflp,
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IntPtr errhp);
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[MonoTODO ("Only will work with 9i and above. Get it to work for 8i as well.")]
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internal string GetRowIdToString (OciErrorHandle errorHandle)
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{
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string output = String.Empty;
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int len = 18; // Universal ROWID has a length of 18
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int maxByteCount = Encoding.UTF8.GetMaxByteCount (len);
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IntPtr outputPtr = OciCalls.AllocateClear (maxByteCount);
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int status = 0;
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ushort u = (ushort) maxByteCount;
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status = OCIRowidToChar (Handle,
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outputPtr,
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ref u,
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errorHandle);
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if (status != 0) {
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OciErrorInfo info = errorHandle.HandleError ();
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throw new OracleException (info.ErrorCode, info.ErrorMessage);
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}
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if (outputPtr != IntPtr.Zero && maxByteCount > 0) {
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object str = Marshal.PtrToStringAnsi (outputPtr, len);
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if (str != null)
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output = String.Copy ((string) str);
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}
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return output;
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}
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#endregion // Methods
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}
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}
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