Ensures the target string ends with the specified string.

   
 

#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;



namespace Newtonsoft.Utilities.Text
{
  public static class StringExtensions
  {

    /// <summary>
    /// Ensures the target string ends with the specified string.
    /// </summary>
    /// <param name="target">The target.</param>
    /// <param name="value">The value.</param>
    /// <returns>The target string with the value string at the end.</returns>
    public static string EnsureEndsWith(this string target, string value)
    {
      if (target == null)
        throw new ArgumentNullException("target");

      if (value == null)
        throw new ArgumentNullException("value");

      if (target.Length >= value.Length)
      {
        if (string.Compare(target, target.Length - value.Length, value, 0, value.Length, StringComparison.OrdinalIgnoreCase) ==
                        0)
          return target;

        string trimmedString = target.TrimEnd(null);

        if (string.Compare(trimmedString, trimmedString.Length - value.Length, value, 0, value.Length,
                        StringComparison.OrdinalIgnoreCase) == 0)
          return target;
      }

      return target + value;
    }
  }
}