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//
// System.Collections.CaseInsensitiveComparer.cs
//
// Authors:
// Sergey Chaban (serge@wildwestsoftware.com)
// Eduardo Garcia Cebollero (kiwnix@yahoo.es)
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// 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.Globalization;
using System.Runtime.InteropServices;
namespace System.Collections
{
#if NET_2_0
[ComVisible(true)]
#endif
[Serializable]
#if INSIDE_CORLIB
public
#else
internal
#endif
class CaseInsensitiveComparer : IComparer
{
private static CaseInsensitiveComparer defaultComparer = new CaseInsensitiveComparer ();
private static CaseInsensitiveComparer defaultInvariantComparer = new CaseInsensitiveComparer (true);
private CultureInfo culture;
// Public instance constructor
public CaseInsensitiveComparer ()
{
//LAMESPEC: This seems to be encoded while the object is created while Comparer does this at runtime.
culture = CultureInfo.CurrentCulture;
}
private CaseInsensitiveComparer (bool invariant)
{
// leave culture == null
}
public CaseInsensitiveComparer (CultureInfo culture)
{
if (culture == null)
throw new ArgumentNullException ("culture");
if (culture.LCID != CultureInfo.InvariantCulture.LCID)
this.culture = culture;
// else leave culture == null
}
//
// Public static properties
//
public static CaseInsensitiveComparer Default {
get {
return defaultComparer;
}
}
#if NET_1_1
public
#else
internal
#endif
static CaseInsensitiveComparer DefaultInvariant {
get {
return defaultInvariantComparer;
}
}
//
// IComparer
//
public int Compare (object a, object b)
{
string sa = a as string;
string sb = b as string;
if ((sa != null) && (sb != null)) {
if (culture != null)
return culture.CompareInfo.Compare (sa, sb, CompareOptions.IgnoreCase);
else
// FIXME: We should call directly into an invariant compare once available in string
return CultureInfo.InvariantCulture.CompareInfo.Compare (sa, sb, CompareOptions.IgnoreCase);
}
else
return Comparer.Default.Compare (a, b);
}
}
}
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