/// <summary>
/// Compares a string against a wildcard pattern.
/// </summary>
/// <param name="input">The string to match.</param>
/// <param name="mask">The wildcard pattern.</param>
/// <returns><c>true</c> if the pattern is matched; otherwise <c>false</c></returns>
public static bool Like(this string input, string mask)
{
var inputEnumerator = new TextEnumerator(input);
var maskEnumerator = new TextEnumerator(mask);
return(Like(inputEnumerator, maskEnumerator));
}
private static bool Like(TextEnumerator inputEnumerator, TextEnumerator maskEnumerator)
{
while (maskEnumerator.MoveNext())
{
switch (maskEnumerator.Current)
{
case '?':
if (!inputEnumerator.MoveNext())
{
return(false);
}
break;
case '*':
do
{
var inputTryAhead = (TextEnumerator)inputEnumerator.Clone();
var maskTryAhead = (TextEnumerator)maskEnumerator.Clone();
if (Like(inputTryAhead, maskTryAhead))
{
return(true);
}
} while (inputEnumerator.MoveNext());
return(false);
case '\\': // escape
maskEnumerator.MoveNext();
goto default;
default:
if (!inputEnumerator.MoveNext() || inputEnumerator.Current != maskEnumerator.Current)
{
return(false);
}
break;
}
}
return(!inputEnumerator.MoveNext());
}