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Luaj 2.0 for the jse platform
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/*******************************************************************************
* Copyright (c) 2009-2012 Luaj.org. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Vector;

import org.luaj.vm2.Globals;
import org.luaj.vm2.LoadState;
import org.luaj.vm2.Lua;
import org.luaj.vm2.LuaFunction;
import org.luaj.vm2.LuaTable;
import org.luaj.vm2.LuaValue;
import org.luaj.vm2.Print;
import org.luaj.vm2.Varargs;
import org.luaj.vm2.lib.jse.JsePlatform;
import org.luaj.vm2.luajc.LuaJC;


/**
 * lua command for use in JSE environments.
 */
public class lua {
	private static final String version = Lua._VERSION + " Copyright (c) 2012 Luaj.org.org";

	private static final String usage = 
		"usage: java -cp luaj-jse.jar lua [options] [script [args]].\n" +
		"Available options are:\n" +
		"  -e stat  execute string 'stat'\n" +
		"  -l name  require library 'name'\n" +
		"  -i       enter interactive mode after executing 'script'\n" +
		"  -v       show version information\n" +
		"  -b      	use luajc bytecode-to-bytecode compiler (requires bcel on class path)\n" +
		"  -n      	nodebug - do not load debug library by default\n" +
		"  -p      	print the prototype\n" +
		"  --       stop handling options\n" +
		"  -        execute stdin and stop handling options";

	private static void usageExit() {
		System.out.println(usage);
		System.exit(-1);		
	}

	private static Globals _G;
	private static boolean print = false;
	
	public static void main( String[] args ) throws IOException {

		// process args
		boolean interactive = (args.length == 0);
		boolean versioninfo = false;
		boolean processing = true;
		boolean nodebug = false;
		boolean luajc = false;
		Vector libs = null;
		try {
			// stateful argument processing
			for ( int i=0; i= args.length )
							usageExit();
						// input script - defer to last stage
						break;
					case 'b':
						luajc = true;
						break;
					case 'l':
						if ( ++i >= args.length )
							usageExit();
						libs = libs!=null? libs: new Vector();
						libs.addElement( args[i] );
						break;
					case 'i':
						interactive = true;
						break;
					case 'v':
						versioninfo = true;
						break;
					case 'n':
						nodebug = true;
						break;
					case 'p':
						print = true;
						break;
					case '-':
						if ( args[i].length() > 2 )
							usageExit();
						processing = false;
						break;
					default:
						usageExit();
						break;
					}
				}
			}

			// echo version
			if ( versioninfo )
				System.out.println(version);
			
			// new lua state
			_G = nodebug? JsePlatform.standardGlobals(): JsePlatform.debugGlobals();
			if ( luajc ) LuaJC.install();
			for ( int i=0, n=libs!=null? libs.size(): 0; i ");
			System.out.flush();
			String line = reader.readLine();
			if ( line == null )
				return;
			processScript( new ByteArrayInputStream(line.getBytes()), "=stdin", null, 0 );
		}
	}
}