ClassLibraryWeiBao/json引擎2/Utilities/MiscellaneousUtils.cs

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#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;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;
using System.Text;
using System.Globalization;

namespace Newtonsoft.Json.Utilities
{
  internal delegate T Creator<T>();

  internal static class MiscellaneousUtils
  {
    public static bool ValueEquals(object objA, object objB)
    {
      if (objA == null && objB == null)
        return true;
      if (objA != null && objB == null)
        return false;
      if (objA == null && objB != null)
        return false;

      // comparing an Int32 and Int64 both of the same value returns false
      // make types the same then compare
      if (objA.GetType() != objB.GetType())
      {
        if (ConvertUtils.IsInteger(objA) && ConvertUtils.IsInteger(objB))
          return Convert.ToDecimal(objA, CultureInfo.CurrentCulture).Equals(Convert.ToDecimal(objB, CultureInfo.CurrentCulture));
        else if ((objA is double || objA is float || objA is decimal) && (objB is double || objB is float || objB is decimal))
          return MathUtils.ApproxEquals(Convert.ToDouble(objA, CultureInfo.CurrentCulture), Convert.ToDouble(objB, CultureInfo.CurrentCulture));
        else
          return false;
      }