Lua 5.2支持

UniLua/LuaEncLib.cs

@@ -0,0 +1,63 @@
+ using System;
+using System.Text;
+
+namespace UniLua
+{
+	class LuaEncLib
+	{
+		public const string LIB_NAME = "enc";
+
+		private const string ENC_UTF8 = "utf8";
+
+		public static int OpenLib( ILuaState lua )
+		{
+			var define = new NameFuncPair[]
+			{
+				new NameFuncPair( "encode", ENC_Encode ),
+				new NameFuncPair( "decode", ENC_Decode ),
+			};
+
+			lua.L_NewLib( define );
+
+			lua.PushString( ENC_UTF8 );
+			lua.SetField( -2, "utf8" );
+
+			return 1;
+		}
+
+		private static int ENC_Encode( ILuaState lua )
+		{
+			var s = lua.ToString(1);
+			var e = lua.ToString(2);
+			if( e != ENC_UTF8 )
+				throw new Exception("unsupported encoding:" + e);
+
+			var bytes = Encoding.ASCII.GetBytes(s);
+			var sb = new StringBuilder();
+			for( var i=0; i<bytes.Length; ++i )
+			{
+				sb.Append( (char)bytes[i] );
+			}
+			lua.PushString( sb.ToString() );
+			return 1;
+		}
+
+		private static int ENC_Decode( ILuaState lua )
+		{
+			var s = lua.ToString(1);
+			var e = lua.ToString(2);
+			if( e != ENC_UTF8 )
+				throw new Exception("unsupported encoding:" + e);
+
+			var bytes = new Byte[s.Length];
+			for( int i=0; i<s.Length; ++i )
+			{
+				bytes[i] = (byte)s[i];
+			}
+
+			lua.PushString( Encoding.ASCII.GetString( bytes ) );
+			return 1;
+		}
+
+	}
+}