Merge branch 'master' into comparisons

1 files changed, 22 insertions, 1 deletions

diff --git a/MediaBrowser.Controller/Extensions/StringExtensions.cs b/MediaBrowser.Controller/Extensions/StringExtensions.cs
index 8441a3171..f1af01345 100644
--- a/MediaBrowser.Controller/Extensions/StringExtensions.cs
+++ b/MediaBrowser.Controller/Extensions/StringExtensions.cs
@@ -21,6 +21,27 @@ namespace MediaBrowser.Controller.Extensions
             return Normalize(string.Concat(chars), NormalizationForm.FormC);
         }
 
+        /// <summary>
+        /// Counts the number of occurrences of [needle] in the string.
+        /// </summary>
+        /// <param name="value">The haystack to search in.</param>
+        /// <param name="needle">The character to search for.</param>
+        /// <returns>The number of occurrences of the [needle] character.</returns>
+        public static int Count(this ReadOnlySpan<char> value, char needle)
+        {
+            var count = 0;
+            var length = value.Length;
+            for (var i = 0; i < length; i++)
+            {
+                if (value[i] == needle)
+                {
+                    count++;
+                }
+            }
+
+            return count;
+        }
+
         private static string Normalize(string text, NormalizationForm form, bool stripStringOnFailure = true)
         {
             if (stripStringOnFailure)
@@ -33,7 +54,7 @@ namespace MediaBrowser.Controller.Extensions
                 {
                     // will throw if input contains invalid unicode chars
                     // https://mnaoumov.wordpress.com/2014/06/14/stripping-invalid-characters-from-utf-16-strings/
-                    text = Regex.Replace(text, "([\ud800-\udbff](?![\udc00-\udfff]))|((?<![\ud800-\udbff])[\udc00-\udfff])", "");
+                    text = Regex.Replace(text, "([\ud800-\udbff](?![\udc00-\udfff]))|((?<![\ud800-\udbff])[\udc00-\udfff])", string.Empty);
                     return Normalize(text, form, false);
                 }
             }