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QutedTextDecoder.cs
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/*******************************************************************************
NbuExplorer - Nokia backup file parser, viewer and extractor
Copyright (C) 2010 Petr Vilem
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Project homepage: http://sourceforge.net/projects/nbuexplorer/
Author: Petr Vilem, [email protected]
*******************************************************************************/
using System.Text;
using System.Text.RegularExpressions;
namespace NbuExplorer
{
public static class QutedTextDecoder
{
private static Encoding enc;
private static Regex rexHexText = new Regex("(=([0-9A-F][0-9A-F]))+");
private static MatchEvaluator eval = new MatchEvaluator(HexTextReplace);
private static string HexTextReplace(Match m)
{
byte[] buff = new byte[m.Groups[2].Captures.Count];
for (int i = 0; i < buff.Length; i++)
{
buff[i] = (byte)int.Parse(m.Groups[2].Captures[i].Value, System.Globalization.NumberStyles.HexNumber);
}
try
{
return enc.GetString(buff);
}
catch
{
return "?";
}
}
public static string Decode(string encodingName, string input)
{
enc = Encoding.GetEncoding(encodingName);
return rexHexText.Replace(input, eval);
}
}
}