Moved OpenALPR-Net to bindings/csharp/

bindings/csharp/openalprnet-cli/CommandLine.cs

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2015 Dr. Masroor Ehsan
+ *
+ * This file is part of OpenAlpr.Net.
+ *
+ * OpenAlpr.Net is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License
+ * version 3 as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+
+namespace openalprnet_cli
+{
+    internal static class CommandLine
+    {
+        private const string NameGroup = "name"; // Names of capture groups
+        private const string ValueGroup = "value";
+        /* The regex that extracts names and comma-separated values for switches 
+        in the form (<switch>[="value 1",value2,...])+ */
+
+        private static readonly Regex RexPattern =
+            new Regex(@"(?<name>[^=]+)=?((?<quoted>\""?)(?<value>(?(quoted)[^\""]+|[^,]+))\""?,?)*",
+                      RegexOptions.Compiled | RegexOptions.CultureInvariant |
+                      RegexOptions.ExplicitCapture | RegexOptions.IgnoreCase);
+
+        public static void Process(this string[] args, Action printUsage, params Switch[] switches)
+        {
+            /* Run through all matches in the argument list and if any of the switches 
+            match, get the values and invoke the handler we were given. We do a Sum() 
+            here for 2 reasons; a) To actually run the handlers
+            and b) see if any were invoked at all (each returns 1 if invoked).
+            If none were invoked, we simply invoke the printUsage handler. */
+            if ((from arg in args
+                 from Match match in RexPattern.Matches(arg)
+                 from s in switches
+                 where match.Success &&
+                       ((string.Compare(match.Groups[NameGroup].Value, s.Name, true) == 0) ||
+                        (string.Compare(match.Groups[NameGroup].Value, s.ShortForm, true) == 0))
+                 select s.InvokeHandler(match.Groups[ValueGroup].Value.Split(','))).Sum() == 0)
+                printUsage(); // We didn't find any switches
+        }
+
+        public class Switch // Class that encapsulates switch data.
+        {
+            public Switch(string name, Action<IEnumerable<string>> handler, string shortForm)
+            {
+                Name = name;
+                Handler = handler;
+                ShortForm = shortForm;
+            }
+
+            public Switch(string name, Action<IEnumerable<string>> handler)
+            {
+                Name = name;
+                Handler = handler;
+                ShortForm = null;
+            }
+
+            public string Name { get; private set; }
+            public string ShortForm { get; private set; }
+            public Action<IEnumerable<string>> Handler { get; private set; }
+
+            public int InvokeHandler(string[] values)
+            {
+                Handler(values);
+                return 1;
+            }
+        }
+    }
+}