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Cache GUID validation regex #142

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Merged
wforney merged 1 commit into from
Sep 20, 2026
Merged

Cache GUID validation regex #142

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22 changes: 16 additions & 6 deletions SharedCode.Core/Text/StringExtensions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,12 @@ namespace SharedCode.Text;
/// </summary>
public static partial class StringExtensions
{
private const string GuidPattern =
"^[A-Fa-f0-9]{32}$|"
+ "^({|\\()?[A-Fa-f0-9]{8}-([A-Fa-f0-9]{4}-){3}[A-Fa-f0-9]{12}(}|\\))?$|"
+ "^({)?[0xA-Fa-f0-9]{3,10}(, {0,1}[0xA-Fa-f0-9]{3,6}){2}, {0,1}({)"
+ "([0xA-Fa-f0-9]{3,4}, {0,1}){7}[0xA-Fa-f0-9]{3,4}(}})$";

/// <summary>
/// Default masking character used in a mask.
/// </summary>
Expand Down Expand Up @@ -419,12 +425,11 @@ public static bool IsGuid(this string @this)
{
_ = @this ?? throw new ArgumentNullException(nameof(@this));

var format = new Regex(
"^[A-Fa-f0-9]{32}$|" + "^({|\\()?[A-Fa-f0-9]{8}-([A-Fa-f0-9]{4}-){3}[A-Fa-f0-9]{12}(}|\\))?$|"
+ "^({)?[0xA-Fa-f0-9]{3,10}(, {0,1}[0xA-Fa-f0-9]{3,6}){2}, {0,1}({)([0xA-Fa-f0-9]{3,4}, {0,1}){7}[0xA-Fa-f0-9]{3,4}(}})$");
var match = format.Match(@this);

return match.Success;
#if NET8_0_OR_GREATER
return GuidRegex().IsMatch(@this);
#else
return GuidRegex.IsMatch(@this);
#endif
}

/// <summary>
Expand Down Expand Up @@ -950,5 +955,10 @@ private static void CreateAlphaNumMask(StringBuilder buffer, string source, char
#if NET8_0_OR_GREATER
[GeneratedRegex("</?.+?>")]
private static partial Regex HtmlTagRegex();

[GeneratedRegex(GuidPattern)]
private static partial Regex GuidRegex();
#else
private static readonly Regex GuidRegex = new(GuidPattern, RegexOptions.Compiled);
#endif
}
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