Sicherung

Kalk/Kalk.Core/Helpers/LineReader.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Kalk.Core.Helpers
+{
+    class LineReader : IEnumerable<string>
+    {
+        private readonly Func<TextReader> _getReader;
+
+        public LineReader(Func<TextReader> getReader)
+        {
+            this._getReader = getReader;
+        }
+
+        public IEnumerator<string> GetEnumerator()
+        {
+            return new LineEnumerator(_getReader());
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        private class LineEnumerator : IEnumerator<string>
+        {
+            private readonly TextReader _reader;
+
+            public LineEnumerator(TextReader reader)
+            {
+                _reader = reader;
+            }
+
+            public bool MoveNext()
+            {
+                Current = _reader.ReadLine();
+                return Current != null;
+            }
+
+            public void Reset()
+            {
+                throw new NotSupportedException("Cannot reset a line reader");
+            }
+
+            public string Current { get; private set; }
+
+            object? IEnumerator.Current => Current;
+
+            public void Dispose()
+            {
+                _reader.Dispose();
+            }
+        }
+    }
+}