moved FieldLoader and .F() ext into OpenRa.FileFormats

OpenRa.FileFormats/FieldLoader.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Linq;
+
+namespace OpenRa.FileFormats
+{
+	public static class FieldLoader
+	{
+		public static void Load(object self, IniSection ini)
+		{
+			foreach (var x in ini)
+			{
+				var field = self.GetType().GetField(x.Key.Trim());
+				field.SetValue(self, GetValue(field.FieldType, x.Value.Trim()));
+			}
+		}
+
+		public static void Load(object self, MiniYaml my)
+		{
+			foreach (var x in my.Nodes)
+			{
+				var field = self.GetType().GetField(x.Key.Trim());
+				if (field == null)
+					throw new NotImplementedException("Missing field `{0}` on `{1}`".F(x.Key.Trim(), self.GetType().Name));
+				field.SetValue(self, GetValue(field.FieldType, x.Value.Value.Trim()));
+			}
+		}
+
+		static object GetValue( Type fieldType, string x )
+		{
+			if( fieldType == typeof( int ) )
+				return int.Parse( x );
+
+			else if (fieldType == typeof(float))
+				return float.Parse(x.Replace("%","")) * (x.Contains( '%' ) ? 0.01f : 1f);
+
+			else if (fieldType == typeof(string))
+				return x;
+
+			else if (fieldType.IsEnum)
+				return Enum.Parse(fieldType, x, true);
+
+			else if (fieldType == typeof(bool))
+				return ParseYesNo(x);
+
+			else if (fieldType.IsArray)
+			{
+				var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+
+				var ret = Array.CreateInstance(fieldType.GetElementType(), parts.Length);
+				for (int i = 0; i < parts.Length; i++)
+					ret.SetValue(GetValue(fieldType.GetElementType(), parts[i].Trim()), i);
+				return ret;
+			}
+			else if (fieldType == typeof(int2))
+			{
+				var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+				return new int2(int.Parse(parts[0]), int.Parse(parts[1]));
+			}
+			else
+				throw new InvalidOperationException("FieldLoader: don't know how to load field of type " + fieldType.ToString());
+		}
+
+		static bool ParseYesNo( string p )
+		{
+			p = p.ToLowerInvariant();
+			if( p == "yes" ) return true;
+			if( p == "true" ) return true;
+			if( p == "no" ) return false;
+			if( p == "false" ) return false;
+			throw new InvalidOperationException();
+		}
+	}
+}