//  SubversionSharp, a wrapper library around the Subversion client API
#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/SubversionSharp
//		Support@softec.st
//
//  Initial authors : 
//		Denis Gervalle
//		Olivier Desaive
#endregion
//
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using Softec.AprSharp;

namespace Softec.SubversionSharp
{
    public unsafe class SvnString : IAprUnmanaged
    {
        private svn_string_t *mString;

        [StructLayout( LayoutKind.Sequential, Pack=4 )]
		private struct svn_string_t
		{
			public IntPtr data;
			public uint len;
   		} 

        #region Generic embedding functions of an IntPtr
        private SvnString(svn_string_t *ptr)
        {
            mString = ptr;
        }
        
        public SvnString(IntPtr ptr)
        {
            mString = (svn_string_t *) ptr.ToPointer();
        }
        
        public SvnString(AprString str, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_create(str, pool)).ToPointer();
		}
        
        public SvnString(string str, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_create(str, pool)).ToPointer();
        }
        
        public SvnString(SvnString str, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_dup(str, pool)).ToPointer();
        }
        
        public SvnString(SvnStringBuf str, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_create_from_buf(str, pool)).ToPointer();
        }
        
        public SvnString(AprString str, int size, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_ncreate(str, unchecked((uint)size), 
        													   pool)).ToPointer();
		}
        
        public SvnString(string str, int size, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_ncreate(str, unchecked((uint)size),
        													   pool)).ToPointer();
        }

		[CLSCompliant(false)]
        public SvnString(AprString str, uint size, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_ncreate(str, size, pool)).ToPointer();
		}
        
		[CLSCompliant(false)]
        public SvnString(string str, uint size, AprPool pool)
        {
        	mString = (svn_string_t *) (Svn.svn_string_ncreate(str, size, pool)).ToPointer();
        }

        public bool IsNull
        {
        	get
        	{
            	return( mString == null );
            }
        }

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

        public void ClearPtr()
        {
            mString = null;
        }

        public IntPtr ToIntPtr()
        {
            return new IntPtr(mString);
        }
        
		public bool ReferenceEquals(IAprUnmanaged obj)
		{
			return(obj.ToIntPtr() == ToIntPtr());
		}
		
        public static implicit operator IntPtr(SvnString str)
        {
            return new IntPtr(str.mString);
        }
        
        public static implicit operator SvnString(IntPtr ptr)
        {
            return new SvnString(ptr);
        }

        public override string ToString()
        {
        	if( IsNull )
        		return("[svn_string:NULL]");
        	else
            	return(Marshal.PtrToStringAnsi(mString->data));
        }
        #endregion

		#region Method wrappers
		public static SvnString Create(AprString str, AprPool pool)
		{
			return(new SvnString(str,pool));
		}
				
		public static SvnString Create(string str, AprPool pool)
		{
			return(new SvnString(str,pool));
		}		
		
		public static SvnString Create(SvnString str, AprPool pool)
		{
			return(new SvnString(str,pool));
		}
		
		public static SvnString Create(SvnStringBuf str, AprPool pool)
		{
			return(new SvnString(str,pool));
		}
		
		public static SvnString Create(AprString str, int size, AprPool pool)
		{
			return(new SvnString(str,size,pool));
		}
				
		public static SvnString Create(string str, int size, AprPool pool)
		{
			return(new SvnString(str,size,pool));
		}		

		[CLSCompliant(false)]
		public static SvnString Create(AprString str, uint size, AprPool pool)
		{
			return(new SvnString(str,size,pool));
		}
				
		[CLSCompliant(false)]
		public static SvnString Create(string str, uint size, AprPool pool)
		{
			return(new SvnString(str,size,pool));
		}		
		#endregion		
						
		#region Properties wrappers
		public AprString Data
		{
			get
			{
				CheckPtr();
				return(new AprString(mString->data));
			}
		}
		 
		public int Len
		{
			get
			{
				CheckPtr();
				return(unchecked((int)mString->len));
			}
		}
		
		[CLSCompliant(false)]
		public uint NativeLen
		{
			get
			{
				CheckPtr();
				return(mString->len);
			}
		}
		#endregion
	}
}