Convert Hex char To Int

#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
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// 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,
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.Text;

namespace Newtonsoft.Json.Utilities
{
internal class MathUtils
{

public static int HexToInt(char h)
{
if ((h >= '0') && (h <= '9')) { return (h - '0'); } if ((h >= 'a') && (h <= 'f')) { return ((h - 'a') + 10); } if ((h >= 'A') && (h <= 'F')) { return ((h - 'A') + 10); } return -1; } } } [/csharp]