Initial commit - framework

src/Util.cs

@@ -0,0 +1,95 @@
+using System.Diagnostics;
+using System.Text;
+
+namespace aoc2022;
+
+internal static class Util
+{
+    private static readonly char[] StripPreamble = new char[] { (char)8745, (char)9559, (char)9488, };
+    internal static void ReadData(string filename, Action<string> processor)
+    {
+        if (Console.IsInputRedirected)
+        {
+            string? line;
+            bool processedSomething = false;
+            for (int i = 0; (line = Console.In.ReadLine()) != null; i++)
+            {
+                if (i == 0)
+                {
+                    var preamble = Encoding.UTF8.GetPreamble();
+                    if (Enumerable.SequenceEqual(line[0..preamble.Length], preamble.Select(x => (char)x)))
+                    {
+                        line = line[preamble.Length..];
+                    }
+                    else if (Enumerable.SequenceEqual(line[0..StripPreamble.Length].ToCharArray(), StripPreamble))
+                    {
+                        line = line[StripPreamble.Length..];
+                    }
+                }
+                processor(line);
+                if (!string.IsNullOrEmpty(line))
+                {
+                    processedSomething = true;
+                }
+            }
+
+            if (processedSomething)
+            {
+                return;
+            }
+        }
+
+        foreach (var line in File.ReadLines(filename))
+        {
+            processor(line);
+        }
+    }
+
+    internal static string ReadAllText(string filename)
+    {
+        string contents = string.Empty;
+        ReadData(filename, (line) => contents = line);
+        return contents;
+    }
+
+    internal static IEnumerable<string> ReadAllLines(string filename)
+    {
+        List<string> lines = new();
+        ReadData(filename, (line) => lines.Add(line));
+        return lines;
+    }
+
+    internal static IEnumerable<long> ReadAllLinesAsInts(string filename)
+    {
+        return ReadAllLines(filename).Select(long.Parse);
+    }
+
+    internal static void StartTestSet(string name)
+    {
+        Logger.Log($"<underline>test: {name}<r>");
+    }
+
+    internal static void StartTest(string label)
+    {
+        Logger.Log($"<magenta>{label}<r>");
+    }
+
+    internal static void TestCondition(Func<bool> a, bool printResult = true)
+    {
+        if (a?.Invoke() == false)
+        {
+            Debug.Assert(false);
+            if (printResult)
+            {
+                Logger.Log("<red>x<r>");
+            }
+        }
+        else
+        {
+            if (printResult)
+            {
+                Logger.Log("<green>✓<r>");
+            }
+        }
+    }
+}