drewlesueur · May 14, 2010 06:12
diff --git a/index.html b/index.html
 <!doctype html>
 <html>
 <head>
 <style>
 textarea {
   width: 500px;
   height: 400px;
 }
 </style>
 <script>
 var pc = 0;
 var scope = {};
 var types = {};
 var lines;
 function trim(str) {
       match = str.match(/^[\s]*([^\s]+)[\s]*$/);
       if (match) {
           return match[1];
       }
 }

 function replacer(match, inner, offset, s) {
     inner = inner.substring(1).substring(0,inner.length-2)
     return "." + lookup(inner);
 }
 function get_var_name(str) {
   str = str.replace(/(\[[^\]]\]+)/g, replacer);
   return str;
 }

 var variable = "[\\s]*([a-zA-Z\\']{1}[\\w\\.\\[\\]]*)[\\s]*";
 var number = "[\\s]*([\\d]+)[\\s]*";
 var other = number;
 var funcs = {
   equal: function(a, b) {
      return a == b;
   }, print: function(a){
       console.log("printing + " + a)
   }
   
 }
 var returns = [];
 var last_if = false;

 function exec(line) {

     // a = 12
     if (match = line.match(new RegExp("^"+variable+"\\=" + number +"$"))) {
         var ee = match[1];
         ee = get_var_name(ee);
         var or = match[2];
         assign(ee, or);
     //a = b    
     } else if (match = line.match(new RegExp("^" + variable + "\\=" + variable + "$"))) { //  /^[\s]*([\w\.\[\]]+)[\s]*\=[\s]*([\a-zA-Z]{1}[\w\.\[\]]*)[\s]*$/)) { //houses = eight;
        var ee = match[1];
        ee = get_var_name(ee);
        var or = match[2];
        or = lookup(or);
        assign(ee,or);
        
     // a  = "houses"
     } else if (match = line.match(new RegExp("^" + variable + '\\=[\\s]*\\"(.*)\\"[\\s]*$'))) {   //  /^[\s]*([\w\.\[\]]+)[\s]*\=[\s]*\"(.*)\"[\s]*$/)) { //houses = "eight";
        var ee = match[1];
        ee = get_var_name(ee);
        var or = match[2];
        assign(ee,or);
     
     //a = call something
     } else if (match = line.match(new RegExp("^" + variable + '\\='))) {
         console.log(line)
     
     
     
     
     /*
      //just a variable  
    // } else if (match = line.match(new RegExp("^" + variable + "$"))) {
    //     ret = lookup(match[1]);
    //     console.log(ret);
    
    //// array literal
     //} else if (match = line.match(new RegExp("^" + variable + "\\=" + "[\\s]*\\[" + "(.*)" + "\\]$" ))) {
     //  var ee = match[1];
     //  var or = match[2];
     //  var arr = or.split(" ");
     //  for (var i in arr) {
     //      assign(ee + "." + i, lookup(arr[i]));
     //  }
     //  console.log(match[2]);
     */
     
     
     
     // func_name:
     } else if (match = line.match(/^([\s]*)([\w]+):/)) { print: //todo don't rememer parenthasized submatch
         liner = match[0];
         spaces = match[1].length;
         func = match[2];
         console.log(func)
         var i = 0
         var next = 0;
         assign(func, pc + 1);
         while (1) {
             pc++;
             if (pc >= lines.length) {
               break;
             }
             next = lines[pc];
             if (next.match(new RegExp("^[\\s]{"+spaces+"}[^\\s]{1}"))) {
                 pc--;
                 break;
             } else {
             }
             
         }
     // func_name()
     } else if (match = line.match(new RegExp("^(" + variable + ")\\(\\)"))) { //print()
         var to = match[1];
         to = trim(to)
         console.log("trimmed is " + to);
         
         returns.push(pc)
         pc = lookup(to) - 1;
         console.log(pc)
     //return
     //} else if (line.match(/^[\s]*return/)){
     //   ret = returns.pop();
     //   pc = ret;
     //    console.log(pc)
     } else if (match = line.match(/^([\s])*if (.*)\:/)) {
                   console.log(line)
                   console.log('hello world')
     } else {
         //call a function.
         var match = line.match(new RegExp("^" + variable + " "))
         console.log(match)
         func = match[1]
         len = match[0].length
         arg = line.substring(len)
         console.log(arg)
         
         if (func in funcs) {
             var ret = funcs[func].apply(arg)
             assign("ret", ret)
         } else {
             func = trim(func)
             returns.push(pc)
             pc = lookup(func) - 1;
         }
     }
 }

 function lookup(v) {
   
   if (v.substr(0,1) == "'")
   return v.substring(1);
   
   v = get_var_name(v);
   console.log("looking up " + v)
   return scope[v];
 }

 function assign(ee,or){

   for (var i in scope) {
       if (i.match(new RegExp("^" + ee + "\\.*"))) {
           delete scope[i];
       }
   }
   scope[ee] = or
   console.log(ee + "=" + or )
  
   if (typeof or == "string" && or.length > 1)
   for (var i = 0; i < or.length; i++) {
           assign(ee + "." + i, or.charAt(i));
   }
 }

 function parse(txt) {
   lines = txt.split("\n");
   var line;
   var iters = 0;
   while (pc < lines.length && iters < 25) {
       iters++
       line = lines[pc]
       match = line.match(/^[\s]*/)
       nexto = pc + 1
       if (nexto < lines.length) {
           next_line = lines[nexto]
           next_match = next_line.match(/^[\s]*/)
           if (next_match[0].length == match[0].length - 2) {
                ret = returns.pop();
                pc = ret;
           }
       }
       
       exec(line);
       pc++;
   }
   pc = 0;
   
 }
 </script>
 </head>
 <body>
 <textarea id="t"></textarea>
 <br>
 <input type="button" onclick="parse(document.getElementById('t').value)" value="run">
 </body>
 </html>
	<!doctype html>
	<html>
	<head>
	<style>
	textarea {
	width: 500px;
	height: 400px;
	}
	</style>
	<script>
	var pc = 0;
	var scope = {};
	var types = {};
	var lines;
	function trim(str) {
	match = str.match(/^[\s]([^\s]+)[\s]$/);
	if (match) {
	return match[1];
	}
	}

	function replacer(match, inner, offset, s) {
	inner = inner.substring(1).substring(0,inner.length-2)
	return "." + lookup(inner);
	}
	function get_var_name(str) {
	str = str.replace(/(\[[^\]]\]+)/g, replacer);
	return str;
	}

	var variable = "[\\s]([a-zA-Z\\']{1}[\\w\\.\\[\\]])[\\s]*";
	var number = "[\\s]([\\d]+)[\\s]";
	var other = number;
	var funcs = {
	equal: function(a, b) {
	return a == b;
	}, print: function(a){
	console.log("printing + " + a)
	}

	}
	var returns = [];
	var last_if = false;

	function exec(line) {

	// a = 12
	if (match = line.match(new RegExp("^"+variable+"\\=" + number +"$"))) {
	var ee = match[1];
	ee = get_var_name(ee);
	var or = match[2];
	assign(ee, or);
	//a = b
	} else if (match = line.match(new RegExp("^" + variable + "\\=" + variable + "$"))) { // /^[\s]([\w\.\[\]]+)[\s]\=[\s]([\a-zA-Z]{1}[\w\.\[\]])[\s]*$/)) { //houses = eight;
	var ee = match[1];
	ee = get_var_name(ee);
	var or = match[2];
	or = lookup(or);
	assign(ee,or);

	// a = "houses"
	} else if (match = line.match(new RegExp("^" + variable + '\\=[\\s]\\"(.)\\"[\\s]$'))) { // /^[\s]([\w\.\[\]]+)[\s]\=[\s]\"(.)\"[\s]$/)) { //houses = "eight";
	var ee = match[1];
	ee = get_var_name(ee);
	var or = match[2];
	assign(ee,or);

	//a = call something
	} else if (match = line.match(new RegExp("^" + variable + '\\='))) {
	console.log(line)




	/*
	//just a variable
	// } else if (match = line.match(new RegExp("^" + variable + "$"))) {
	// ret = lookup(match[1]);
	// console.log(ret);

	//// array literal
	//} else if (match = line.match(new RegExp("^" + variable + "\\=" + "[\\s]\\[" + "(.)" + "\\]$" ))) {
	// var ee = match[1];
	// var or = match[2];
	// var arr = or.split(" ");
	// for (var i in arr) {
	// assign(ee + "." + i, lookup(arr[i]));
	// }
	// console.log(match[2]);
	*/



	// func_name:
	} else if (match = line.match(/^([\s]*)([\w]+):/)) { print: //todo don't rememer parenthasized submatch
	liner = match[0];
	spaces = match[1].length;
	func = match[2];
	console.log(func)
	var i = 0
	var next = 0;
	assign(func, pc + 1);
	while (1) {
	pc++;
	if (pc >= lines.length) {
	break;
	}
	next = lines[pc];
	if (next.match(new RegExp("^[\\s]{"+spaces+"}[^\\s]{1}"))) {
	pc--;
	break;
	} else {
	}

	}
	// func_name()
	} else if (match = line.match(new RegExp("^(" + variable + ")\\(\\)"))) { //print()
	var to = match[1];
	to = trim(to)
	console.log("trimmed is " + to);

	returns.push(pc)
	pc = lookup(to) - 1;
	console.log(pc)
	//return
	//} else if (line.match(/^[\s]*return/)){
	// ret = returns.pop();
	// pc = ret;
	// console.log(pc)
	} else if (match = line.match(/^([\s])if (.)\:/)) {
	console.log(line)
	console.log('hello world')
	} else {
	//call a function.
	var match = line.match(new RegExp("^" + variable + " "))
	console.log(match)
	func = match[1]
	len = match[0].length
	arg = line.substring(len)
	console.log(arg)

	if (func in funcs) {
	var ret = funcs[func].apply(arg)
	assign("ret", ret)
	} else {
	func = trim(func)
	returns.push(pc)
	pc = lookup(func) - 1;
	}
	}
	}

	function lookup(v) {

	if (v.substr(0,1) == "'")
	return v.substring(1);

	v = get_var_name(v);
	console.log("looking up " + v)
	return scope[v];
	}

	function assign(ee,or){

	for (var i in scope) {
	if (i.match(new RegExp("^" + ee + "\\.*"))) {
	delete scope[i];
	}
	}
	scope[ee] = or
	console.log(ee + "=" + or )

	if (typeof or == "string" && or.length > 1)
	for (var i = 0; i < or.length; i++) {
	assign(ee + "." + i, or.charAt(i));
	}
	}

	function parse(txt) {
	lines = txt.split("\n");
	var line;
	var iters = 0;
	while (pc < lines.length && iters < 25) {
	iters++
	line = lines[pc]
	match = line.match(/^[\s]*/)
	nexto = pc + 1
	if (nexto < lines.length) {
	next_line = lines[nexto]
	next_match = next_line.match(/^[\s]*/)
	if (next_match[0].length == match[0].length - 2) {
	ret = returns.pop();
	pc = ret;
	}
	}

	exec(line);
	pc++;
	}
	pc = 0;

	}
	</script>
	</head>
	<body>
	<textarea id="t"></textarea>
	<br>
	<input type="button" onclick="parse(document.getElementById('t').value)" value="run">
	</body>
	</html>