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/***************************************************************************
* Utility.cs
*
* Copyright (C) 2005-2006 Novell, Inc.
* Written by Aaron Bockover <aaron@abock.org>
****************************************************************************/
/* THIS FILE IS LICENSED UNDER THE MIT LICENSE AS OUTLINED IMMEDIATELY BELOW:
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
using System;
using System.Runtime.InteropServices;
namespace Njb
{
internal class Utility
{
private static int Utf8StringLength(IntPtr ptr)
{
int size;
for(size = 0; Marshal.ReadByte(ptr, size) != 0; size++);
return size;
}
public static string PtrToUtf8String(IntPtr ptr)
{
if(ptr == IntPtr.Zero) {
return null;
}
byte [] bytes = new byte[Utf8StringLength(ptr)];
Marshal.Copy(ptr, bytes, 0, bytes.Length);
return System.Text.Encoding.UTF8.GetString(bytes);
}
public static IntPtr Utf8StringToPtr(string str)
{
byte [] bytes = System.Text.Encoding.UTF8.GetBytes(str);
IntPtr memalloc = Marshal.AllocHGlobal(bytes.Length + 1);
Marshal.Copy(bytes, 0, memalloc, bytes.Length);
Marshal.WriteByte(memalloc, bytes.Length, 0);
return memalloc;
}
public static void FreeStringPtr(IntPtr ptr)
{
Marshal.FreeHGlobal(ptr);
}
}
}