/* =================================================== -*- C++ -*-
 * tcl.js "A Tcl implementation in Javascript"
 *
 * Released under the same terms as Tcl itself.
 * (BSD license found at <http://www.tcl.tk/software/tcltk/license.html>)
 *
 * Based on Picol by Salvatore Sanfilippo (<http://antirez.com/page/picol>)
 * (c) Stéphane Arnold 2007
 * Richard Suchenwirth 2007, 2013: cleanup, additions
 * vim: syntax=javascript autoindent softtabwidth=4
 */
// 'use strict'; // breaks some tests, like expr 0376, for loop
var _step = 0; // set to 1 for debugging
var fs = require('fs');
var puts = console.log;

function TclInterp () {
    this.patchlevel = "0.5.3";
    this.callframe  = [{}];
    this.level      = 0;
    this.levelcall  = [];
    this.commands   = {};
    this.procs      = [];
    this.script     = "";
    this.OK  = 0;
    this.RET = 1;
    this.BRK = 2;
    this.CNT = 3;
    this.getVar = function(name) {
        var nm = name.toString();
        if (nm.match("^::env[(]")) nm = nm.substr(2);
        if (nm.match("^env[(]")) {
            var key = nm.substr(4,nm.length-5);
            var val = process.env[key];
        } else if (nm.match("^::")) {
            var val = this.callframe[0][nm.substr(2)]; // global
        } else {
            var val = this.callframe[this.level][name];

    }
    this.setVar("argc",  process.argv.length-2);
    this.setVar("argv0", process.argv[1]);
    this.setVar("argv",  process.argv.slice(2));
    this.setVar("errorInfo", "");

    this.incrLevel = function() {
      //puts("going down from ("+this.level+"): "+this.levelcall);
      this.callframe[++this.level] = {};
      return this.level;
    }
    this.decrLevel = function() {
      this.callframe[this.level] = null;
      this.level--;
      if (this.level < 0) throw "Exit application";
      this.result = null;
    }
    this.getCommand = function(name) {
        try {
            return this.commands[name];
        } catch (e) {throw "No such command '"+name+"'";}
    }
    this.registerCommand = function(name, func, privdata) {
        if (func == null) throw "No such function: "+name;
        this.commands[name] = new TclCommand(func, privdata);
     }
    this.registerSubCommand = function(name, subcmd, func, privdata) {
      if (func == null) throw "No such subcommand: "+ name +" " + subcmd;
      var path = name.split(" ");
      var ens;
      name = path.shift();
      var cmd = this.commands[name];
      if (cmd == null) {
	ens = {};

	this.commands[name] = new TclCommand(Tcl.EnsembleCommand, null, ens);
      }
      ens = this.commands[name].ensemble;
      if (ens == null) throw "Not an ensemble command: '"+name+"'";
      // walks deeply into the subcommands tree
      while (path.length > 0) {
	name = path.shift();
	cmd  = ens[name];
	if (cmd == null) {
	  cmd = new TclCommand(Tcl.EnsembleCommand, null, {});
	  ens[name] = cmd;
	  ens = cmd.ensemble;

	}
      }
      ens[subcmd] = new TclCommand(func, privdata);
    }
    this.eval = function (code) {
      try {
	return this.eval2(code);

	  text = this.getVar(text);
	} else if (parser.type == (parser.CMD)) {
	  try {
	    text = this.eval2(text);
	  } catch (e) {throw (e + "\nwhile parsing \"" + text + "\"");}
	} else if (parser.type == (parser.ESC)) {
	  // escape handling missing!
	  // puts("escape handler called");
	} else if (parser.type == (parser.SEP)) {
	  prevtype = parser.type;
	  continue;
	}
	text = this.objectify(text);
	if (parser.type ==parser.EOL || parser.type == parser.EOF) {
	  prevtype = parser.type;
	  if (args.length > 0) {
	    try {
	      result = this.call(args);
	    } catch(e) {
	      if(_step) puts("level: "+this.level+" args: "+args+" exception: "+e);
	      var cmd = this.getCommand(args[0]);
	      if (cmd == null) {
		if(args.length==1 && (args[0].toString().match(/ /))) {
		  throw e;
		}
		throw 'invalid command name "'+args[0]+'"';
	      }
	      if (cmd.ensemble != null) {
		throw 'wrong # args: should be "'+args[0]
		  +' subcommand ?argument ...?"';
	      }
	      throw e;
	    }
	    if (this.code != this.OK) return this.objectify(result);
	  }
	  args = [];
	  continue;
	}

      });
    this.registerSubCommand("clock", "scan", function (interp, args) {
        return Date.parse(args[1]);
      });
    this.registerSubCommand("clock", "seconds", function (interp, args) {
	return Math.floor((new Date()).valueOf()/1000);
      });
    this.registerCommand("concat", function (interp, args) {
        this.arity(args, 1, Infinity);
	var res = [];
	for(var i = 1; i < args.length; i++) {
	  res = res.concat(args[i].toList());
	}
	return res;
      });
    this.registerSubCommand("dict", "create", function (interp, args) {
	if(args.length % 2 == 0) 
	  throw 'wrong # args: should be "dict create ?key value ...?"';
	return new TclObject(args.slice(1));
      });
    this.registerSubCommand("dict", "exists", function (interp, args) {
	if(args.length < 2) 
	  throw 'wrong # args: should be "dict exists dictionary ?key ...?"';
	var dict = args[1].toList();
	var key  = args[2].toString();
	for (var i=0;i < dict.length;i+=2) {
	  if(dict[i].toString() == key) return 1;
	}
	return 0;
      });
    this.registerSubCommand("dict", "get", function (interp, args) {
	if(args.length < 2) 
	  throw 'wrong # args: should be "dict get dictionary ?key ...?"';
	var dict = args[1].toList();
	var key  = args[2].toString();
	for (var i=0;i < dict.length;i+=2) {
	  if(dict[i].toString() == key) return dict[i+1];
	}
	throw 'key "'+key+'" not known in dictionary';
      });
    this.registerSubCommand("dict", "keys", function (interp, args) {
	if(args.length < 2 || args.length > 3) 
	  throw 'wrong # args: should be "dict keys dictionary ?globPattern?"';
	var dict    = args[1].toList();
	var pattern = ".*";
	if(args.length == 3) pattern = "^"+args[2].toString().replace(/\*/g,".*");
	var res  = [];
	for (var i=0;i < dict.length;i+=2) {
	  if(dict[i].toString().match(pattern)) res.push(dict[i]);
	}
	return res;
      });
    this.registerSubCommand("dict", "set", function (interp, args) {
	this.arity(args, 4);
	var name  = args[1];

	var key   = args[2].toString();
	var val   = args[3].toString();
	var dict  = [];
	try {dict = interp.getVar(name);} catch(e) {dict = new TclObject([])};
	var found = false;
	var list  = dict.toList();
	for (var i = 0; i < list.length; i += 2) {
	  if(list[i].toString() == key) {
	    list[i+1] = val;
	    found = true;
	    break;
	  }
	}
	if (!found) {
	  list.push(interp.objectify(key)); 
	  list.push(interp.objectify(val));
	} 
	interp.setVar(name, dict);
	return dict;
      });
    this.registerSubCommand("dict", "unset", function (interp, args) {
	this.arity(args, 3);
	var name  = args[1];
	var key   = args[2].toString();
	var dict  = [];
	try {dict = interp.getVar(name);} catch(e) {dict = new TclObject([])};
	var found = false;
	var list  = dict.toList();
	for (var i = 0; i < list.length; i += 2) {
	  if(list[i].toString() == key) {
	    found = true;
	    break;
	  }
	}
	if(found) {
	  if(i == list.length) i -= 2;
	    list.splice(i, 2);
	    interp.setVar(name, dict);
	}
	return dict;
      });
    /*
      if(typeof(jQuery) != 'undefined') {
      this.registerCommand("dom", function (interp, args) {
      var selector = args[1].toString();
      var fn = args[2].toString();

    */
    this.registerCommand("exit",function (interp, args) {
	this.arity(args, 1,2);
	var rc = 0;
	if (args.length == 2) rc = args[1];
	process.exit(rc);
      });
    var acos = Math.acos;
    var exp  = Math.exp;
    var sqrt = Math.sqrt; // "publish" other Math.* functions as needed

    this.registerCommand("expr", function (interp, args) {
	var expression = args.slice(1).join(" ");
	return interp.expr(interp, expression);
      });
    this.expr = function (interp, expression) { // also used in for, if, while
      try {
	var mx = expression.match(/(\[.*\])/g);
	for (var i in mx)
	  puts("have to deal with "+mx[i].toString());
      } catch(e) {puts(i+". exception: "+e);}
      mx = expression.match(/(\$[A-Za-z0-9_:]+)/g);
      for (i in mx) {
	var val = interp.getVar(mx[i].slice(1)).toString();
	if(isNaN(val) || !isFinite(val)) val = '"'+val+'"';
	eval("var "+mx[i]+' = '+val);
      }
      var res = eval(expression);
      if(res == false) res = 0; else if(res == true) res = 1;
      return res;
    };
    this.registerSubCommand("file", "dirname", function (interp, args) {
        this.arity(args, 2);
	var path = args[1].toString().split("/");
	path.pop();

    this.registerCommand("foreach", function (interp, args) {
        this.arity(args, 4);
        var list = args[2].toList();
        var body = args[3].toString();
        var res    = "";
        interp.inLoop = true;
        interp.code = interp.OK;
        for(var i in list) {
	  //puts("now at "+list[i]+" level: "+interp.level);
	  interp.setVar(args[1],interp.objectify(list[i]));
	  interp.eval(body);
	  if(interp.code == interp.BRK) break;
	  if(interp.code == interp.CNT) continue;
        }
        interp.inLoop = false;
        if(interp.code == interp.BRK || interp.code == interp.CNT)
            interp.code=interp.OK;
        return "";
    });
    this.registerCommand("format", function (interp, args) {
        this.arity(args, 3);
	var fmt = args[1];
	var val = args[2];
	if(fmt=="%x") {
	  var x = new Number(val);
	  return x.toString(16);
	} else if(fmt=="%X") {
	  var x = new Number(val);
	  return x.toString(16).toUpperCase();
	}
	else throw "unknown format";
	
      });
    /*
    this.registerCommand("gets", function (interp, args) {
        this.arity(args, 2, 3);
	this.tmp = null;
	rl.on('line', itp.gets);
	while(true) {
	  if(this.tmp != null) break;
	};
	rl.on('line', this.getsevalputs);
        var reply = this.tmp;
        // = prompt(args[1],"");
        //process.stdin.resume();
        //process.stdin.on('data', function(str) {
        //reply = str;
        //    });
        if(args[2] != null) {
	  interp.setVar(args[2],interp.objectify(reply));
	  return reply.length;
        } else return reply;
      });
    */
    this.registerCommand("if", function (interp, args) {
        this.arity(args, 3, Infinity);
        var cond = args[1].toString();
        var test = interp.objectify(interp.expr(interp, cond));
        if (test.toBoolean()) return interp.eval(args[2].toString());
        if (args.length == 3) return;
        for (var i = 3; i < args.length; ) {

        if (!interp.procs[name]) throw '"'+name+'" isn\'t a procedure';
        return interp.getCommand(name).privdata[1];
    });
    this.registerSubCommand("info", "commands", function (interp, args) {
        return interp.mkList(interp.commands);
    });
    this.registerSubCommand("info", "exists", function (interp, args) {
        this.arity(args, 2);
	var name = args[1];
	try {interp.getVar(name); return 1;} catch(e) {return 0;}
    });
    this.registerSubCommand("info", "globals", function (interp, args) {
        return interp.mkList(interp.callframe[0]);
    });
    /* not in "real" Tcl
    this.registerSubCommand("info", "isensemble", function (interp, args) {
        this.arity(args, 2);
        var name = args[1].toString();
	var cmd  = interp.getCommand(name);
        return (cmd != null && cmd.ensemble != null)? "1" : "0";
	}); */
    this.registerSubCommand("info", "level", function (interp, args) {
	if(args.length == 1)
	  return interp.level;
	var delta = args[1];
	return interp.levelcall[interp.level - delta];
    });
    this.registerSubCommand("info", "nameofexecutable", function (interp, args) {
            return process.execPath;
    });
    this.registerSubCommand("info", "patchlevel", function (interp, args) {
	return interp.patchlevel;
    });
    this.registerSubCommand("info", "procs", function (interp, args) {
        return interp.mkList(interp.procs);
    });
    this.registerSubCommand("info", "script", function (interp, args) {
        return interp.script;
    });
    this.registerSubCommand("info", "vars", function (interp, args) {
	var res = [];
	for(i in interp.callframe[interp.level]) {
	  try {
	    if(interp.getVar(i) != null) {res.push(i);}
	  } catch(e) {};
	}
	return res;
    });
    this.registerCommand("join", function (interp, args) {
	this.arity(args, 2, 3);
	var lst = args[1].toList();
	var sep = " ";
	if(args.length == 3) sep = args[2].toString();
	var res = [];
	var re  = /^{.*}$/;
	for (var i in lst) {
	  var word = lst[i].toString();
	  if (re.test(word)) word = word.substring(1,word.length-1);
	  res.push(word);
	}
	return res.join(sep);
      });
    this.registerCommand("jseval", function (interp, args) {
        return eval(args[1].toString());
      });
    this.registerCommand("lappend", function (interp, args) {
        this.arity(args, 2, Infinity);
        var vname = args[1].toString();
	try {
	  var list = interp.getVar(vname);
	} catch(e) {var list = new TclObject([]);}
        list.toList();
        for (var i = 2; i < args.length; i++) {
	  if(args[i] == "") args[i] = "{}";
	  list.content.push(interp.objectify(args[i]));
        }
        interp.setVar(vname, list);
        return list;
      });
    this.registerCommand("lindex", function (interp, args) {
        this.arity(args, 3, Infinity);

        this.arity(args, 4);
        var list    = interp.objectify(args[1]);
        var start = list.listIndex(args[2]);
        var end     = list.listIndex(args[3])+1;
        try {
	  return list.content.slice(start, end);
        } catch (e) {return [];}
      });
    this.registerCommand("lreverse", function (interp, args) {
        this.arity(args, 2);
        return args[1].toList().reverse();
      });
    this.registerCommand("lset", function (interp, args) {
        this.arity(args, 4, Infinity);
        var list = interp.getVar(args[1].toString());
        var elt = list;
        for (var i = 2; i < args.length-2; i++) {
	  elt.toList();
	  elt = interp.objectify(elt.content[elt.listIndex(args[i])]);
        }
        elt.toList();
        i = args.length - 2;
        elt.content[elt.listIndex(args[i])] = interp.objectify(args[i+1]);
        return list;
      });
    this.registerCommand("lsearch", function (interp, args) {
        this.arity(args, 3);
        var lst = args[1].toList();
        for(var i in lst) if(lst[i] == args[2].toString()) return i;
        return -1;
      });
    this.registerCommand("lsort", function (interp, args) {
        this.arity(args, 2);
        return args[1].toList().sort();
      });
    this.registerCommand("pid", function (interp, args) {

    this.registerCommand("split", function (interp, args) {
        this.arity(args, 2, 3);
        var str = args[1].toString();
        var sep = " ";
        if (args.length == 3) sep = args[2].toString();
	var res = [], e;
        var tmp = str.split(sep);
	for(var i in tmp) {
	  e = tmp[i];
	  if(e == "") e = "{}";
	  res.push(e);
	}
	return res.join(" ");
      });
    this.registerSubCommand("string", "compare", function (interp, args) {
        this.arity(args, 3);
	var a = args[1].toString();
	var b = args[2].toString();
	return a > b? "1": a < b? "-1": "0";
      });
    this.registerSubCommand("string", "equal", function (interp, args) {
        this.arity(args, 3);
        return (args[1].toString() == args[2].toString())? "1": "0";
      });
    this.registerSubCommand("string", "index", function (interp, args) {
        this.arity(args, 3);

        var n    = (args.length == 3)? args[2] : 1;
        var t0   = sec_msec();
        for(var i = 0; i < n; i++) interp.eval(body);
        return (sec_msec()-t0)*1000/n + " microseconds per iteration";
    });
    this.registerCommand("unset", function (interp, args) {
        this.arity(args, 2, Infinity);
        for (var i = 1; i < args.length; i++)
	  interp.setVar(args[i], null);
    });
    this.registerCommand("uplevel",function (interp, args) {
        this.arity(args, 3, Infinity);
	var mycallframe = interp.callframe[interp.level];
        var delta = args[1].toInteger();
        interp.level -= delta;
	if(interp.level < 0) {
	  interp.level += delta;
	  throw 'bad level "'+delta+'"';
	}
        for (var i = 2; i < args.length; i++) args[i] = args[i].toString();
        if (args.length == 3) {
	  var code = args[2];
        } else var code = args.slice(2).join(" ");
        var res = interp.eval(code);
        interp.level += delta;
	interp.callframe[interp.level] = mycallframe;
        return res;
      });
    this.registerCommand("while", function (interp, args) {
        this.arity(args, 3);
        var cond = args[1].toString();
        var body = args[2].toString();
        var res  = "";

	  interp.code=interp.OK;
        return interp.objectify(res);
      });
    // native cmdname {function(interp, args) {...}}
    this.registerCommand("native", function (interp, args) {
        this.arity(args, 3);
        var cmd = args[1].toList();
	puts("before eval "+args[2]);
        var func = eval(args[2].toString());
	puts("ok so far");
        //alert("in: "+args[2].toString()+", func: "+ func);
        if (cmd.length == 1) {
	  interp.registerCommand(cmd[0].toString(), func);
	  return;
        }
        base = cmd[0].toString();
        cmd.shift();

      case ">":  return a > b? "1":"0";
      case "==": return a == b? "1":"0";
      case "!=": return a != b? "1":"0";
      default:   throw "Unknown operator: '"+name+"'";
      }
    }
    var ops = ["+","-","*","/","%","<",">","==","!="];
    for (var i in ops)
      this.registerCommand(ops[i],function (interp, args) {
	  this.arity(args, 3);
	  var name = args[0].toString();
	  var a    = interp.objectify(args[1]);
	  var b    = interp.objectify(args[2]);
	  if (name == '==') 
	    return new TclObject(a.toString() == b.toString()?"1":"0","BOOL");

	text = [text];
      break;
      }
      return this.objectify(text);
    }
    this.call = function(args) {
      if(_step) puts("this.call "+args);
      var func = this.getCommand(args[0]);
      if(func == null) throw 'invalid command name "'+args[0]+'"';
      var res  = func.call(this,args);
      switch (this.code) {
      case this.OK: case this.RET: return res;
      case this.BRK:
	if (!this.inLoop) throw 'invoked "break" outside of a loop';
	break;
      case this.CNT:
	if (!this.inLoop) throw 'invoked "continue" outside of a loop';
	break;
      default: throw "Unknown return code " + this.code;
      }
      return res;
    }
}

   } catch (e) {
       interp.decrLevel();
       throw "Tcl.Proc exception "+e;
   }
}
/** Manage subcommands */
Tcl.EnsembleCommand = function (interp, args) {
  var sub  = args[1].toString();
  var main = args.shift().toString()+" "+sub;
  args[0]  = main;
  var ens  = this.ensemble;
  if (ens == null) {
    throw "Not an ensemble command: "+main;
  } else if (ens[sub] == null) {
    
    var matches   = 0, lastmatch = "";
    for (var i in ens) { // maybe unambiguous prefix?
      if (i.match("^"+sub) != null) {
	matches  += 1;
	lastmatch = i;
      } 
    }
    if(matches == 1) {
      sub = lastmatch;
    } else {
      var r = [];
      for (i in ens) r.push(i);
      r[r.length-1] = "or "+r[r.length-1];
      throw 'unknown or ambiguous subcommand "'+sub+'": must be '+r.join(", ");

    }

  }


  return ens[sub].call(interp, args);



}

function TclObject(text) {
    this.TEXT    = 0;
    this.LIST    = 1;
    this.INTEGER = 2;
    this.REAL    = 3;
    this.BOOL    = 4;
    switch (arguments[0]) {

            if (Tcl.isList.test(res[i]) && !Tcl.isNested.test(res[i]))
                res[i] = "{" + res[i] + "}";
        }
        if (res.length == 1) return res[0];
        return res.join(" ");
    }
    this.toString = function () {
      if (this.type != this.TEXT) {
	if (this.type == this.LIST)
	  this.content = this.getString(this.content);
	else this.content = this.content.toString();
	this.type = this.TEXT;
      }
      return this.content;
    }
    this.toList = function () {
      if (this.type != this.LIST) {
	if (this.type != this.TEXT)
	  this.content[0] = this.content;
	else {

	  var text = this.content;
	  if (text.charAt(0) == "{" && text.charAt(text.length-1) == "}")
	    text = text.substring(1, text.length-1);
	  if (text == "")
	    return [];
	  
	  var parser = new TclParser(text.toString());
	  this.content = [];
	  for(;;) {
	    parser.parseList();
	    this.content.push(new TclObject(parser.getText()));
	    if (parser.type == parser.EOL || parser.type == parser.ESC)
	      break;
	  }
	}	

	this.type = this.LIST;
      }
      return this.content;
    }
    this.toInteger = function () {
      if (this.type == this.INTEGER) return this.content;
      this.toString();
      if (this.content.match(Tcl.isHex))
	this.content = parseInt(this.content.substring(2), 16);
      else if (this.content.match(Tcl.isOctal))
	this.content = parseInt(this.content, 8);
      else if (this.content.match(Tcl.isDecimal))
	this.content = parseInt(this.content);
      else throw "Not an integer: '"+this.content+"'";
      if (isNaN(this.content)) throw "Not an integer: '"+this.content+"'";
      this.type = this.INTEGER;
      return this.content;
    }
    this.getFloat = function (text) {
      if (!text.toString().match(Tcl.isReal))
        throw "Not a real: '"+text+"'";
      return parseFloat(text);
    }
    this.toReal = function () {
      if (this.type == this.REAL)
        return this.content;
      this.toString();
      // parseFloat doesn't control all the string, so need to check it
      this.content = this.getFloat(this.content);
      if (isNaN(this.content)) throw "Not a real: '"+this.content+"'";
      this.type = this.REAL;
      return this.content;
    }
    this.getNumber = function () {
      try {
	return this.toInteger();
      } catch (e) {return this.toReal();}
    }
    this.toBoolean = function () {
      if (this.type == this.BOOL) return this.content;
      try {
	this.content = (this.toInteger() != 0);
      } catch (e) {
	var t = this.content;
	if (t instanceof Boolean) return t;
	switch (t.toString().toLowerCase()) {
	case "yes": case "true": case "on":
	  this.content = true;
	  break;
	case "false": case "off": case "no":
	  this.content = false;
	  break;
	default:
	  throw "Boolean expected, got: '"+this.content+"'";
	}
      }
      this.type = this.BOOL;
      return this.content;
    }
}
function TclCommand(func, privdata) {
  if (func == null) throw "No such function";
  this.func     = func;
  this.privdata = privdata;
  this.ensemble = arguments[2];

    while (true) {
      if (this.len == 0) {
	this.end = this.index-1;
	this.type = this.ESC;
	return this.OK;
      }
      if (this.cur == "\\") {
	//if (this.len >= 2) this.feedSequence();
      }
      else if ("$[ \t\n\r;".indexOf(this.cur)>=0) {
	if ("$[".indexOf(this.cur)>=0 || !this.insidequote) {
	  this.end = this.index-1;
	  this.type = this.ESC;
	  return this.OK;
	}
      }
      else if (this.cur == '"' && this.insidequote) {
	this.end    = this.index-1;
	this.type = this.ESC;
	this.feedchar();
	this.insidequote = false;
	return this.OK;
      }
      this.feedchar();
    }
    return this.OK;
  }
  this.parseList = function () {
    var level = 0;
    this.start = this.index;
    while (true) {
      if (this.len == 0) {
	this.end  = this.index;
	this.type = this.EOL;
	return;
      }
      switch (this.cur) {
      case "\\":
	if (this.len >= 2) this.feedSequence();
	break;
      case " ": case "\t": case "\n": case "\r":
	if (level > 0) break;
	this.end  = this.index - 1;
	this.type = this.SEP;
	this.feedchar();
	return;
      case '{': level++; break;
      case '}': level--; break;
      }
      this.feedchar();

	continue;
      }
      return this.parseString();
    }
    return this.OK; // unreached
  }
  this.feedSequence = function () {
    //return;
    if (this.cur != "\\") throw "Invalid escape sequence";
    var cur = this.steal(1);
    //puts("enter feedSequence, text: "+this.text+" cur: "+cur);
    var specials = {};
    specials.a = "\a";
    specials.b = "\b";
    specials.f = "\f";
    specials.n = "\n";
    specials.r = "\r";
    specials.t = "\t";
    specials.v = "\v";
    switch (cur) {
    case 'u':
      var hex = this.steal(4);
      if (hex != Tcl.isHexSeq.exec(hex))
	throw "Invalid unicode escape sequence: "+hex;
      cur = String.fromCharCode(parseInt(hex,16));
      break;
    case 'x':
      var hex = this.steal(2);
      puts("enter case x, hex: '"+hex+"'");
      if (hex != Tcl.isHexSeq.exec(hex))
	throw "Invalid unicode escape sequence: "+hex;
      cur = String.fromCharCode(parseInt(hex,16));
      //puts("hex: "+hex.toString()+" cur: "+cur);
      break;
    case "a": case "b": case "f": case "n":
    case "r": case "t": case "v":
      cur = specials[cur];
      break;
    default:
      if ("0123456789".indexOf(cur) >= 0) {

    this.text[index] = cur;
    this.feedchar();
  }
  this.steal = function (n) {
    var tail = this.text.substring(this.index+1);
    var word = tail.substr(0, n);
    this.text = this.text.substring(0, this.index-1) + tail.substring(n);
    //puts("tail: "+tail+" word: "+word);
    return word;
  }
  this.feedcharstart = function () {
    this.feedchar();
    this.start = this.index;
  }
  this.setPos = function (index) {

process.argv.slice(2).forEach(function(cmd,index,array) {
       itp.eval(cmd);
     });
var readline = require('readline');
var rl = readline.createInterface(process.stdin, process.stdout);
rl.setPrompt('% ');
rl.prompt();
itp.getsevalputs = function(line) {
    try {
      res = itp.eval(line.trim());
    } catch(e) {res = e;}
    if(res != null && res.toString() != "" && res.toString().length) 
      puts(res.toString());
    rl.prompt();
};
itp.gets = function(line) {
  puts("received "+line); 
  this.tmp = line;
}
rl.on('line', itp.getsevalputs
).on('close',function() {
    process.exit(0);
  });

# test suite for TclJS
# This file is designed so it can also run in a tclsh. Some JavaScript goodies,
# like 1/0, sqrt(-1) were excluded from the tests.
# [clock format 0] was excluded because the timezone string differed.

set vars [info vars] ;# for later cleanup
set version 0.5.3
set total   0
set passed  0
set fail    0
puts "------------------------ [info script] patchlevel: [info patchlevel]"

proc e.g. {cmd -> expected} {
    incr ::total
    incr ::fail ;# to also count exceptions
    set res [uplevel 1 $cmd]
    if ![string equal $res $expected] {
    #if {$res != $expected} {} #should work, but wouldn't
	puts "**** $cmd -> $res, expected: $expected"
    } else {incr ::passed; incr ::fail -1}
}












# e.g. {exec echo hello} -> hello ;# needs blocking exec

e.g. {append new hello} -> hello
e.g. {set x foo}        -> foo
e.g. {append x bar}     -> foobar

proc sum args {expr [join $args +]}
e.g. {sum 1 2 3} -> 6
#native sum2 {function (interp, args) {return eval(args.join("+"));}}
#e.g. {sum2 2 3 4} -> 9

e.g. {concat {a b} {c d}} -> {a b c d}

e.g. {set d [dict create a 1 b 2 c 3]} -> {a 1 b 2 c 3}
e.g. {dict exists $d c} -> 1
e.g. {dict exists $d x} -> 0
e.g. {dict get $d b}    -> 2
e.g. {dict keys $d}     -> {a b c}
e.g. {dict set d b 5}   -> {a 1 b 5 c 3}
e.g. {dict set d x 7}   -> {a 1 b 5 c 3 x 7}
e.g. {dict unset d b}   -> {a 1 c 3 x 7}
e.g. {dict unset d x}   -> {a 1 c 3}
e.g. {dict unset d nix} -> {a 1 c 3}
e.g. {dict set dx a 1}  -> {a 1} ;# create new dict if not exists

e.g. {set home [file dirname [pwd]]; list} -> {}
e.g. {string equal [set env(HOME)] $home}   -> 1
e.g. {string equal [set ::env(HOME)] $home} -> 1

e.g. {expr 6*7}         -> 42
e.g. {expr {6 * 7 + 1}} -> 43
e.g. {set x 43}         -> 43
e.g. {expr {$x-1}}      -> 42
e.g. {expr $x-1}        -> 42
if ![info exists auto_path] { ;#these tests are not for a real tclsh
    e.g. {clock format 0} -> {Thu Jan 01 1970 01:00:00 GMT+0100 (CET)}
    e.g. {set i [expr 1/0]} -> Infinity
    e.g. {expr $i==$i+42}   -> 1
    e.g. {set n [expr sqrt(-1)]} -> NaN
    e.g. {expr $n == $n} -> 0
    e.g. {expr $n==$n}   -> 0
    e.g. {expr $n!=$n}   -> 1
    e.g. {info patchlevel} -> $version
    e.g. {set vars}      -> {argc argv0 argv errorInfo} ;# many more in real Tcl

}
e.g. {expr 0xFF}               -> 255
e.g. {set x 0xFF; expr {$x+0}} -> 255
e.g. {expr 0376}               -> 254
e.g. {set x 0375; expr $x}     -> 253
e.g. {expr {$x}}   -> 253
e.g. {expr 6 * 7}  -> 42

e.g. {expr 1 == 2} -> 0
e.g. {expr 1 < 2}  -> 1
e.g. {expr !0}     -> 1
e.g. {expr !42}    -> 0
e.g. {set x 3}     -> 3
e.g. {expr $x+1}   -> 4
e.g. {expr {$x+1}} -> 4
e.g. {set x a; set y b; expr {$x == $y}} -> 0
e.g. {expr {$x != $y}} -> 1

set forres ""
e.g. {for {set i 0} {$i < 5} {incr i} {append forres $i}; set forres} -> 01234
e.g. {foreach i {a b c d e} {append foreachres $i}; set foreachres}   -> abcde

e.g. {format %x 255} -> ff
e.g. {format %X 254} -> FE

e.g. {set x 41}  -> 41
e.g. {incr x}    -> 42
e.g. {incr x 2}  -> 44
e.g. {incr x -3} -> 41

e.g. {info args e.g.} -> {cmd -> expected}
e.g. {unset -nocomplain foo} -> {}
e.g. {info exists foo} -> 0
e.g. {set foo 42}      -> 42
e.g. {info exists foo} -> 1
e.g. {info level}      -> 0 ;# e.g. runs the command one level up
e.g. {proc f x {set y 0; info vars}} -> ""
e.g. {f 41}            -> {x y}
set tmp [f 40]; e.g. {lappend tmp z} -> {x y z}
e.g. {info args f}      -> x
e.g. {info body f}      -> {set y 0; info vars}
e.g. {info bod f}       -> {set y 0; info vars}

e.g. {join {a b c}}     -> {a b c}
e.g. {join {a b c} +}   -> {a+b+c}
e.g. {join {a {b c} d}} -> {a b c d}
e.g. {join {a b c} ""}  -> abc

e.g. {set x {a b c}}      -> {a b c}
e.g. {set x [list a b c]} -> {a b c}
e.g. {lappend x}          -> {a b c}
e.g. {lappend x {}}       -> {a b c {}}
e.g. {set x}              -> {a b c {}}
e.g. {lset x 3 e}         -> {a b c e}
e.g. {llength $x}         -> 4
e.g. {lindex $x 2}        -> c
e.g. {lrange $x 1 2}      -> {b c}
e.g. {lreverse {a b c}}   -> {c b a}
e.g. {lsearch $x b}       -> 1
e.g. {lsearch $x y}       -> -1
e.g. {lsort {z x y}}      -> {x y z}

e.g. {regexp {X[ABC]Y} XAY}    -> 1
e.g. {regexp {X[ABC]Y} XDY}    -> 0
e.g. {regsub {[A-C]+} uBAAD x} -> uxD 

e.g. {split "a b  c d"}     -> {a b {} c d}
e.g. {split " a b  c d"}     -> {{} a b {} c d}
e.g. {split "a b  c d "}     -> {a b {} c d {}}
e.g. {split usr/local/bin /} -> {usr local bin}
e.g. {split /usr/local/bin /} -> {{} usr local bin}
e.g. {split abc ""}          -> {a b c}

e.g. {string compare a b}     -> -1
e.g. {string compare b a}     -> 1
e.g. {string compare b b}     -> 0
e.g. {string equal foo foo}   -> 1
e.g. {string equal foo bar}   -> 0
e.g. {string index abcde 2}   -> c
e.g. {string length ""}       -> 0
e.g. {string length foo}      -> 3
e.g. {string range hello 1 3} -> ell
e.g. {string tolower Tcl}     -> tcl
e.g. {string toupper Tcl}     -> TCL
e.g. {string trim " foo "}    -> foo

#e.g. {set x a.\x62.c} -> a.b.c ;# severe malfunction, breaks test suite operation :(










puts "total $total tests, passed $passed, failed $fail"
#----------- clean up variables used in tests
foreach var [info vars] {

    set pos [lsearch $vars $var] ;# expr can't substitute commands yet
    set neq [string compare $var vars]



    if {$var != "vars" && $pos < 0} {unset $var}
}
unset vars var pos neq
puts "vars now: [info vars]"
puts "[llength [info commands]] commands implemented"