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annotate src/luan/CmdLine.java @ 31:5cf15507d77e

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separate interpreter from interface git-svn-id: https://luan-java.googlecode.com/svn/trunk@32 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 13 Dec 2012 02:50:04 +0000
parents 8d8f4f5caef4
children 0cdc1da466ee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
1 package luan;
b7d7069fee58 add assignment statement and CmdLine
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2
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3 import java.io.InputStreamReader;
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4 import java.util.Arrays;
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5 import java.util.Scanner;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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6 import luan.lib.BasicLib;
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7 import luan.interp.LuaCompiler;
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10 public class CmdLine {
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11 static final String version = "Luan 0.0";
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12
b7d7069fee58 add assignment statement and CmdLine
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13 public static void main(String[] args) throws Exception {
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14 LuaState lua = LuaCompiler.newLuaState();
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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15 BasicLib.register(lua);
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16 boolean interactive = false;
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17 boolean showVersion = false;
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18 int i = 0;
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19 if( args.length == 0 ) {
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20 interactive = true;
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21 showVersion = true;
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22 } else {
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23 while( i < args.length ) {
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24 String arg = args[i];
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25 if( !arg.startsWith("-") || arg.equals("--") )
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26 break;
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27 if( arg.equals("-i") ) {
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28 interactive = true;
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29 } else if( arg.equals("-v") ) {
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30 showVersion = true;
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31 } else if( arg.equals("-e") ) {
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32 if( ++i == args.length )
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33 error("'-e' needs argument");
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34 String cmd = args[i];
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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35 try {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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36 LuaFunction fn = BasicLib.load(lua,cmd);
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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37 fn.call(lua);
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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38 } catch(LuaException e) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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39 System.err.println("command line error: "+e.getMessage());
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40 System.exit(-1);
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41 }
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42 } else if( arg.equals("-") ) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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43 String cmd = BasicLib.readAll(new InputStreamReader(System.in));
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44 try {
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45 LuaFunction fn = BasicLib.load(lua,cmd);
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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46 fn.call(lua);
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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47 } catch(LuaException e) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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48 System.err.println(e.getMessage());
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49 System.exit(-1);
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50 }
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51 System.exit(0);
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52 } else {
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53 error("unrecognized option '"+arg+"'");
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54 }
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55 i++;
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56 }
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57 }
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58 if( showVersion )
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59 System.out.println(version);
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60 if( i < args.length ) {
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61 String file = args[i++];
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62 Object[] varArgs = new Object[args.length-1];
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63 System.arraycopy(args,1,varArgs,0,varArgs.length);
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64 LuaTable argsTable = new LuaTable();
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65 for( int j=0; j<args.length; j++ ) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 21
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66 argsTable.set( new LuaNumber(j), args[j] );
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 21
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67 }
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68 lua.env().set("arg",argsTable);
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69 try {
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70 LuaFunction fn = BasicLib.loadfile(lua,file);
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71 fn.call(lua,varArgs);
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72 } catch(LuaException e) {
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73 // System.err.println(e.getMessage());
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74 e.printStackTrace();
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75 System.exit(-1);
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76 }
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77 }
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78 if( interactive )
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79 interactive(lua);
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80 }
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81
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82 private static void error(String msg) {
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83 System.err.println(msg);
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84 System.err.println("usage: java luan.CmdLine [options] [script [args]]");
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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85 System.err.println("Available options are:");
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86 System.err.println(" -e stat execute string 'stat'");
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87 System.err.println(" -i enter interactive mode after executing 'script'");
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88 // System.err.println(" -l name require library 'name'");
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89 System.err.println(" -v show version information");
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90 // System.err.println(" -E ignore environment variables");
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91 System.err.println(" -- stop handling options");
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92 System.err.println(" - stop handling options and execute stdin");
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93 System.exit(-1);
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94 }
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95
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96 static void interactive(LuaState lua) {
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97 while( true ) {
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98 System.out.print("> ");
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99 String input = new Scanner(System.in).nextLine();
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100 try {
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101 LuaFunction fn = BasicLib.load(lua,input);
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102 Object[] rtn = fn.call(lua);
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103 if( rtn.length > 0 )
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104 BasicLib.print(rtn);
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105 } catch(LuaException e) {
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106 System.out.println(e.getMessage());
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107 }
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108 }
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109 }
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110 }