/// <summary>
/// Instantiate internal regex member if not already done.
/// </summary>
/// <returns>True on success, false otherwise.</returns>
private void Init()
{
StringComparison GetStringComparison()
{
StringComparison stringComparison;
if (Options.HasFlag(WildcardOptions.IgnoreCase))
{
stringComparison = Options.HasFlag(WildcardOptions.CultureInvariant)
? StringComparison.InvariantCultureIgnoreCase
: CultureInfo.CurrentCulture.Name.Equals("en-US-POSIX", StringComparison.OrdinalIgnoreCase)
// The collation behavior of the POSIX locale (also known as the C locale) is case sensitive.
// For this specific locale, we use 'OrdinalIgnoreCase'.
? StringComparison.OrdinalIgnoreCase
: StringComparison.CurrentCultureIgnoreCase;
}
else
{
stringComparison = Options.HasFlag(WildcardOptions.CultureInvariant)
? StringComparison.InvariantCulture
: StringComparison.CurrentCulture;
}
return(stringComparison);
}
if (_isMatch != null)
{
return;
}
if (Pattern.Length == 1 && Pattern[0] == '*')
{
_isMatch = s_matchAll;
return;
}
int index = Pattern.IndexOfAny(s_specialChars);
if (index == -1)
{
// No special characters present in the pattern, so we can just do a string comparison.
_isMatch = str => string.Equals(str, Pattern, GetStringComparison());
return;
}
if (index == Pattern.Length - 1 && Pattern[index] == '*')
{
// No special characters present in the pattern before last position and last character is asterisk.
var patternWithoutAsterisk = Pattern.AsMemory().Slice(0, index);
_isMatch = str => str.AsSpan().StartsWith(patternWithoutAsterisk.Span, GetStringComparison());
return;
}
var matcher = new WildcardPatternMatcher(this);
_isMatch = matcher.IsMatch;
}
/// <summary>
/// Instantiate internal regex member if not already done.
/// </summary>
/// <returns>True on success, false otherwise.</returns>
private void Init()
{
StringComparison GetStringComparison()
{
StringComparison stringComparison;
if (Options.HasFlag(WildcardOptions.IgnoreCase))
{
stringComparison = Options.HasFlag(WildcardOptions.CultureInvariant)
? StringComparison.InvariantCultureIgnoreCase
: StringComparison.CurrentCultureIgnoreCase;
}
else
{
stringComparison = Options.HasFlag(WildcardOptions.CultureInvariant)
? StringComparison.InvariantCulture
: StringComparison.CurrentCulture;
}
return(stringComparison);
}
if (_isMatch != null)
{
return;
}
if (Pattern.Length == 1 && Pattern[0] == '*')
{
_isMatch = s_matchAll;
return;
}
int index = Pattern.IndexOfAny(s_specialChars);
if (index == -1)
{
// No special characters present in the pattern, so we can just do a string comparison.
_isMatch = str => string.Equals(str, Pattern, GetStringComparison());
return;
}
if (index == Pattern.Length - 1 && Pattern[index] == '*')
{
// No special characters present in the pattern before last position and last character is asterisk.
var patternWithoutAsterisk = Pattern.AsMemory().Slice(0, index);
_isMatch = str => str.AsSpan().StartsWith(patternWithoutAsterisk.Span, GetStringComparison());
return;
}
var matcher = new WildcardPatternMatcher(this);
_isMatch = matcher.IsMatch;
}
