root/trunk/AprSharp/dev/src/AprHashIndex.cs

//  AprSharp, a wrapper library around the Apache Portable Runtime Library
#region Copyright (C) 2004 SOFTEC sa.
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//  Sources, support options and lastest version of the complete library
//  is available from:
//              http://www.softec.st/AprSharp
//              
//
//  Initial authors : 
//              Denis Gervalle
//              Olivier Desaive
#endregion
//
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Collections;

namespace Softec.AprSharp
{
    public struct AprHashIndex : IAprUnmanaged
    {
        IntPtr mHashIndex;

        #region Generic embedding functions of an IntPtr
        public AprHashIndex(IntPtr ptr)
        {
            mHashIndex = ptr;
        }
        
        public bool IsNull
        {
                get
                {
                return( mHashIndex == IntPtr.Zero );
            }
        }

        private void CheckPtr()
        {
            if( IsNull )
                throw new AprNullReferenceException(); 
        }

        public void ClearPtr()
        {
            mHashIndex = IntPtr.Zero;
        }

        public IntPtr ToIntPtr()
        {
            return mHashIndex;
        }

                public bool ReferenceEquals(IAprUnmanaged obj)
                {
                        return(obj.ToIntPtr() == ToIntPtr());
                }
                
        public static implicit operator IntPtr(AprHashIndex hashIndex)
        {
            return hashIndex.mHashIndex;
        }
        
        public static implicit operator AprHashIndex(IntPtr ptr)
        {
            return new AprHashIndex(ptr);
        }

        public override string ToString()
        {
            return("[apr_hash_index_t:"+mHashIndex.ToInt32().ToString("X")+"]");
        }
        #endregion
        
        #region Methods wrappers
        public static AprHashIndex First(AprPool pool, AprHash h)
        {
            IntPtr ptr;
            
            Debug.Write(String.Format("apr_hash_first({0},{1})...",pool,h));
            ptr = Apr.apr_hash_first(pool,h);
            Debug.WriteLine(String.Format("Done({0:X})",((Int32)ptr)));

            return(ptr);
        }
        
        public void Next()
        {
            IntPtr ptr;
            
                CheckPtr();
            Debug.Write(String.Format("apr_hash_next({0})...",this));
            ptr = Apr.apr_hash_next(mHashIndex);
            Debug.WriteLine(String.Format("Done({0:X})",((Int32)ptr)));
            mHashIndex = ptr;
        }

        public void This(out string key, out string value)
        {
            IntPtr v;
            
            This(out key, out v);
            value = Marshal.PtrToStringAnsi(v);
        }
        
        public void This(out string key, out IntPtr value)
        {
            IntPtr k;
            int size;
            
            This(out k, out size, out value);
            key = Marshal.PtrToStringAnsi(k);
        }

        public void This(out IntPtr key, out int size, out IntPtr value)
        {
                CheckPtr();
            Debug.Write(String.Format("apr_hash_this({0})...",this));
            Apr.apr_hash_this(mHashIndex, out key, out size, out value);
            Debug.WriteLine(String.Format("Done({0:X},{1},{2:X})",key.ToInt32(),size,value.ToInt32()));
        }    
                #endregion
        }
 }