/**
 *
 *  Javascript sprintf
 *  http://www.webtoolkit.info/
 *
 *
 **/

sprintfWrapper = {
    init : function () {
	if (typeof arguments == "undefined") { return null; }
	if (arguments.length < 1) { return null; }
	if (typeof arguments[0] != "string") { return null; }
	if (typeof RegExp == "undefined") { return null; }
	
	var string = arguments[0];
	var exp = new RegExp(/(%([%]|(\-)?(\+|\x20)?(0)?(\d+)?(\.(\d)?)?([bcdfosxX])))/g);
	var matches = new Array();
	var strings = new Array();
	var convCount = 0;
	var stringPosStart = 0;
	var stringPosEnd = 0;
	var matchPosEnd = 0;
	var newString = '';
	var match = null;
	
	while (match = exp.exec(string)) {
	    if (match[9]) { convCount += 1; }
	    
	    stringPosStart = matchPosEnd;
	    stringPosEnd = exp.lastIndex - match[0].length;
	    strings[strings.length] = string.substring(stringPosStart, stringPosEnd);
	    
	    matchPosEnd = exp.lastIndex;
	    matches[matches.length] = {
		match: match[0],
		left: match[3] ? true : false,
		sign: match[4] || '',
		pad: match[5] || ' ',
		min: match[6] || 0,
		precision: match[8],
		code: match[9] || '%',
		negative: parseInt(arguments[convCount]) < 0 ? true : false,
		argument: String(arguments[convCount])
	    };
	}
	strings[strings.length] = string.substring(matchPosEnd);
	
	if (matches.length == 0) { return string; }
	if ((arguments.length - 1) < convCount) { return null; }
	
	var code = null;
	var match = null;
	var i = null;
	
	for (i=0; i<matches.length; i++) {
	    
	    if (matches[i].code == '%') { substitution = '%' }
	    else if (matches[i].code == 'b') {
		matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(2));
		substitution = sprintfWrapper.convert(matches[i], true);
	    }
	    else if (matches[i].code == 'c') {
		matches[i].argument = String(String.fromCharCode(parseInt(Math.abs(parseInt(matches[i].argument)))));
		substitution = sprintfWrapper.convert(matches[i], true);
	    }
	    else if (matches[i].code == 'd') {
		matches[i].argument = String(Math.abs(parseInt(matches[i].argument)));
		substitution = sprintfWrapper.convert(matches[i]);
	    }
	    else if (matches[i].code == 'f') {
		matches[i].argument = String(Math.abs(parseFloat(matches[i].argument)).toFixed(matches[i].precision ? matches[i].precision : 6));
		substitution = sprintfWrapper.convert(matches[i]);
	    }
	    else if (matches[i].code == 'o') {
		matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(8));
		substitution = sprintfWrapper.convert(matches[i]);
	    }
	    else if (matches[i].code == 's') {
		matches[i].argument = matches[i].argument.substring(0, matches[i].precision ? matches[i].precision : matches[i].argument.length)
		substitution = sprintfWrapper.convert(matches[i], true);
	    }
	    else if (matches[i].code == 'x') {
		matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(16));
		substitution = sprintfWrapper.convert(matches[i]);
	    }
	    else if (matches[i].code == 'X') {
		matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(16));
		substitution = sprintfWrapper.convert(matches[i]).toUpperCase();
	    }
	    else {
		substitution = matches[i].match;
	    }
	    
	    newString += strings[i];
	    newString += substitution;
	    
	}
	newString += strings[i];
	
	return newString;
	
    },
    
    convert : function(match, nosign){
	if (nosign) {
	    match.sign = '';
	} else {
	    match.sign = match.negative ? '-' : match.sign;
	}
	var l = match.min - match.argument.length + 1 - match.sign.length;
	var pad = new Array(l < 0 ? 0 : l).join(match.pad);
	if (!match.left) {
	    if (match.pad == "0" || nosign) {
		return match.sign + pad + match.argument;
	    } else {
		return pad + match.sign + match.argument;
	    }
	} else {
	    if (match.pad == "0" || nosign) {
		return match.sign + match.argument + pad.replace(/0/g, ' ');
	    } else {
		return match.sign + match.argument + pad;
	    }
	}
    }
}

sprintf = sprintfWrapper.init;