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//
// OciErrorHandle.cs
//
// Part of managed C#/.NET library System.Data.OracleClient.dll
//
// Part of the Mono class libraries at
// mcs/class/System.Data.OracleClient/System.Data.OracleClient.Oci
//
// Assembly: System.Data.OracleClient.dll
// Namespace: System.Data.OracleClient.Oci
//
// Author:
// Tim Coleman <tim@timcoleman.com>
//
// Copyright (C) Tim Coleman, 2003
//
using System;
using System.Runtime.InteropServices;
using System.Text;
namespace System.Data.OracleClient.Oci {
internal sealed class OciErrorHandle : OciHandle, IDisposable
{
#region Fields
bool disposed = false;
#endregion // Fields
#region Constructors
public OciErrorHandle (OciHandle parent, IntPtr newHandle)
: base (OciHandleType.Error, parent, newHandle)
{
}
#endregion // Constructors
#region Methods
protected override void Dispose (bool disposing)
{
if (!disposed) {
disposed = true;
base.Dispose (disposing);
}
}
public static void ThrowExceptionIfError (OciHandle hwnd, int status)
{
if (status == 0)
return;
OciErrorInfo info = HandleError (hwnd, status);
throw new OracleException (info.ErrorCode, info.ErrorMessage);
}
public static OciErrorInfo HandleError (OciHandle hwnd, int status)
{
OciErrorInfo info;
info.ErrorCode = status;
info.ErrorMessage = OciGlue.ReturnCodeToString (status);
if (status == OciGlue.OCI_ERROR || status == OciGlue.OCI_SUCCESS_WITH_INFO) {
OciHandle h = hwnd;
if (h == null)
throw new Exception ("Internal driver error: handle is null.");
int errbufSize = 4096;
IntPtr errbuf = OciCalls.AllocateClear (errbufSize);
OciCalls.OCIErrorGet (hwnd,
1,
IntPtr.Zero,
out info.ErrorCode,
errbuf,
(uint) errbufSize,
OciHandleType.Error);
byte[] bytea = new byte[errbufSize];
Marshal.Copy (errbuf, bytea, 0, errbufSize);
errbufSize = 0;
// first call to OCICharSetToUnicode gets the size
OciCalls.OCICharSetToUnicode (h, null, bytea, out errbufSize);
StringBuilder str = new StringBuilder (errbufSize);
// second call to OCICharSetToUnicode gets the string
OciCalls.OCICharSetToUnicode (h, str, bytea, out errbufSize);
string errmsg = String.Empty;
if (errbufSize > 0) {
errmsg = str.ToString ();
info.ErrorMessage = String.Copy (errmsg);
}
Marshal.FreeHGlobal (errbuf);
}
return info;
}
public static OciErrorInfo HandleError (OciHandle hand)
{
OciErrorInfo info;
info.ErrorCode = 0;
info.ErrorMessage = String.Empty;
int errbufSize = 4096;
IntPtr errbuf = OciCalls.AllocateClear (errbufSize);
OciCalls.OCIErrorGet (hand,
1,
IntPtr.Zero,
out info.ErrorCode,
errbuf,
(uint) errbufSize,
OciHandleType.Error);
byte[] bytea = new byte[errbufSize];
Marshal.Copy (errbuf, bytea, 0, errbufSize);
errbufSize = 0;
OciHandle h = hand.Parent;
if (h == null)
h = hand;
if (h == null)
throw new Exception ("Internal driver error: handle is null.");
// first call to OCICharSetToUnicode gets the size
OciCalls.OCICharSetToUnicode (h, null, bytea, out errbufSize);
StringBuilder str = new StringBuilder (errbufSize);
// second call to OCICharSetToUnicode gets the string
OciCalls.OCICharSetToUnicode (h, str, bytea, out errbufSize);
string errmsg = String.Empty;
if (errbufSize > 0)
errmsg = str.ToString ();
else
errmsg = "Internal driver error. Could not retrieve error message.";
info.ErrorMessage = String.Copy (errmsg);
Marshal.FreeHGlobal (errbuf);
return info;
}
public OciErrorInfo HandleError ()
{
return HandleError (this);
}
#endregion // Methods
}
}
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