internal static WildcardElement Create(string pattern, ref int patternIndex)
{
if (patternIndex >= pattern.Length)
{
return(null);
}
switch (pattern[patternIndex])
{
case '*':
return(WildcardAsteriskElement.Create(pattern, ref patternIndex));
case '?':
return(WildcardQuestionElement.Create(pattern, ref patternIndex));
case '#':
return(WildcardSharpElement.Create(pattern, ref patternIndex));
case '[':
{
int startIndex = patternIndex;
WildcardElement element = WildcardRangeElement.Create(pattern, ref patternIndex);
if (element == null)
{
patternIndex = startIndex;
element = WildcardStringElement.Create(pattern, ref patternIndex);
}
return(element);
}
default:
return(WildcardStringElement.Create(pattern, ref patternIndex));
}
}
internal new static WildcardStringElement Create(string pattern, ref int patternIndex)
{
int patternLength = pattern.Length;
var builder = new StringBuilder(patternLength - patternLength);
while (patternIndex < patternLength)
{
switch (pattern[patternIndex])
{
case '\\':
{
patternIndex++;
if (patternIndex < patternLength)
{
builder.Append(pattern[patternIndex++]);
}
}
continue;
case '*':
case '?':
case '#':
case '[':
break;
default:
{
builder.Append(pattern[patternIndex++]);
}
continue;
}
break;
}
var element = new WildcardStringElement();
element.Pattern = builder.ToString();
element.Next = WildcardElement.Create(pattern, ref patternIndex);
return(element);
}
