private static string EncodeName(string name, /*Name_not_NmToken*/ bool first, bool local)
{
if (string.IsNullOrEmpty(name))
{
return(name);
}
StringBuilder bufBld = null;
int length = name.Length;
int copyPosition = 0;
int position = 0;
int underscorePos = name.IndexOf('_');
MatchCollection mc = null;
IEnumerator en = null;
if (underscorePos >= 0)
{
if (s_encodeCharPattern == null)
{
s_encodeCharPattern = new Regex("(?<=_)[Xx]([0-9a-fA-F]{4}|[0-9a-fA-F]{8})_");
}
mc = s_encodeCharPattern.Matches(name, underscorePos);
en = mc.GetEnumerator();
}
int matchPos = -1;
if (en != null && en.MoveNext())
{
global::System.Text.RegularExpressions.Match m = (global::System.Text.RegularExpressions.Match)en.Current;
matchPos = m.Index - 1;
}
if (first)
{
if ((!s_xmlCharType.IsStartNCNameCharXml4e(name[0]) && (local || (!local && name[0] != ':'))) ||
matchPos == 0)
{
if (bufBld == null)
{
bufBld = new StringBuilder(length + 20);
}
bufBld.Append("_x");
if (length > 1 && XmlCharType.IsHighSurrogate(name[0]) && XmlCharType.IsLowSurrogate(name[1]))
{
int x = name[0];
int y = name[1];
Int32 u = XmlCharType.CombineSurrogateChar(y, x);
bufBld.Append(u.ToString("X8", CultureInfo.InvariantCulture));
position++;
copyPosition = 2;
}
else
{
bufBld.Append(((Int32)name[0]).ToString("X4", CultureInfo.InvariantCulture));
copyPosition = 1;
}
bufBld.Append('_');
position++;
if (matchPos == 0)
{
if (en.MoveNext())
{
global::System.Text.RegularExpressions.Match m = (global::System.Text.RegularExpressions.Match)en.Current;
matchPos = m.Index - 1;
}
}
}
}
for (; position < length; position++)
{
if ((local && !s_xmlCharType.IsNCNameCharXml4e(name[position])) ||
(!local && !s_xmlCharType.IsNameCharXml4e(name[position])) ||
(matchPos == position))
{
if (bufBld == null)
{
bufBld = new StringBuilder(length + 20);
}
if (matchPos == position)
{
if (en.MoveNext())
{
global::System.Text.RegularExpressions.Match m = (global::System.Text.RegularExpressions.Match)en.Current;
matchPos = m.Index - 1;
}
}
bufBld.Append(name, copyPosition, position - copyPosition);
bufBld.Append("_x");
if ((length > position + 1) && XmlCharType.IsHighSurrogate(name[position]) && XmlCharType.IsLowSurrogate(name[position + 1]))
{
int x = name[position];
int y = name[position + 1];
Int32 u = XmlCharType.CombineSurrogateChar(y, x);
bufBld.Append(u.ToString("X8", CultureInfo.InvariantCulture));
copyPosition = position + 2;
position++;
}
else
{
bufBld.Append(((Int32)name[position]).ToString("X4", CultureInfo.InvariantCulture));
copyPosition = position + 1;
}
bufBld.Append('_');
}
}
if (copyPosition == 0)
{
return(name);
}
else
{
if (copyPosition < length)
{
bufBld.Append(name, copyPosition, length - copyPosition);
}
return(bufBld.ToString());
}
}