/*
*  Javascript sprintf 
* http://www.webtoolkit.info/ 
    %% - Returns a percent sign
    %b - Binary number
    %c - The character according to the ASCII value
    %d - Signed decimal number
    %f - Floating-point number
    %o - Octal number
    %s - String
    %x - Hexadecimal number (lowercase letters)
    %X - Hexadecimal number (uppercase letters)

	Additional format values. These are placed between the % and the letter (example %.2f):

    + (Forces both + and - in front of numbers. By default, only negative numbers are marked)
    - (Left-justifies the variable value)
    0 zero will be used for padding the results to the right string size
    [0-9] (Specifies the minimum width held of to the variable value)
    .[0-9] (Specifies the number of decimal digits or maximum string length)

*/
 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;