/**
*
*  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;