private static String ValidateCharset(String cs)
{
if (cs == null || cs.Length == 0)
{
return(null);
}
cs = iText.IO.Util.StringUtil.ReplaceAll(cs.Trim(), "[\"']", "");
if (PortUtil.CharsetIsSupported(cs))
{
return(cs);
}
StringBuilder upperCase = new StringBuilder();
for (int i = 0; i < cs.Length; i++)
{
upperCase.Append(char.ToUpper(cs[i]));
}
cs = upperCase.ToString();
if (PortUtil.CharsetIsSupported(cs))
{
return(cs);
}
// if our this charset matching fails.... we just take the default
return(null);
}