function sprintf ( ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Ash Searle (http://hexmen.com/blog/)
    // + namespaced by: Michael White (http://getsprink.com)
    // +    tweaked by: Jack
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: Paulo Ricardo F. Santos
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: Brett Zamir (http://brett-zamir.me)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: sprintf("%01.2f", 123.1);
    // *     returns 1: 123.10
    // *     example 2: sprintf("[%10s]", 'monkey');
    // *     returns 2: '[    monkey]'
    // *     example 3: sprintf("[%'#10s]", 'monkey');
    // *     returns 3: '[####monkey]'

    var regex = /%%|%(\d+\$)?([-+\'#0 ]*)(\*\d+\$|\*|\d+)?(\.(\*\d+\$|\*|\d+))?([scboxXuidfegEG])/g;
    var a = arguments, i = 0, format =  _proxy_jslib_handle(a, (i++), 0, 0);

    // pad()
    var pad = function (str, len, chr, leftJustify) {
        if (!chr) {chr = ' ';}
        var padding = (str.length >= len) ? '' : Array(1 + len - str.length >>> 0).join(chr);
        return leftJustify ? str + padding : padding + str;
    };

    // justify()
    var justify = function (value, prefix, leftJustify, minWidth, zeroPad, customPadChar) {
        var diff = minWidth -  _proxy_jslib_handle(null, 'value', value, 0, 0).length;
        if (diff > 0) {
            if (leftJustify || !zeroPad) {
                 value= _proxy_jslib_assign_rval('', 'value', '=', ( pad( _proxy_jslib_handle(null, 'value', value, 0, 0), minWidth, customPadChar, leftJustify)), value);
            } else {
                 value= _proxy_jslib_assign_rval('', 'value', '=', (  _proxy_jslib_handle(null, 'value', value, 0, 0).slice(0, prefix.length) + pad('', diff, '0', true) +  _proxy_jslib_handle(null, 'value', value, 0, 0).slice(prefix.length)), value);
            }
        }
        return  _proxy_jslib_handle(null, 'value', value, 0, 0);
    };

    // formatBaseX()
    var formatBaseX = function (value, base, prefix, leftJustify, minWidth, precision, zeroPad) {
        // Note: casts negative numbers to positive ones
        var number =  _proxy_jslib_handle(null, 'value', value, 0, 0) >>> 0;
        prefix = prefix && number && {'2': '0b', '8': '0', '16': '0x'}[base] || '';
         value= _proxy_jslib_assign_rval('', 'value', '=', ( prefix + pad( _proxy_jslib_handle(number, 'toString', '', 1, 0)(base), precision || 0, '0', false)), value);
        return justify( _proxy_jslib_handle(null, 'value', value, 0, 0), prefix, leftJustify, minWidth, zeroPad);
    };

    // formatString()
    var formatString = function (value, leftJustify, minWidth, precision, zeroPad, customPadChar) {
        if (precision != null) {
             value= _proxy_jslib_assign_rval('', 'value', '=', (  _proxy_jslib_handle(null, 'value', value, 0, 0).slice(0, precision)), value);
        }
        return justify( _proxy_jslib_handle(null, 'value', value, 0, 0), '', leftJustify, minWidth, zeroPad, customPadChar);
    };

    // doFormat()
    var doFormat = function (substring, valueIndex, flags, minWidth, _, precision, type) {
        var number;
        var prefix;
        var method;
        var textTransform;
        var value;

        if (substring == '%%') {return '%';}

        // parse flags
        var leftJustify = false, positivePrefix = '', zeroPad = false, prefixBaseX = false, customPadChar = ' ';
        var flagsl = flags.length;
        for (var j = 0; flags && j < flagsl; j++) {
            switch (flags.charAt(j)) {
                case ' ': positivePrefix = ' '; break;
                case '+': positivePrefix = '+'; break;
                case '-': leftJustify = true; break;
                case "'": customPadChar = flags.charAt(j+1); break;
                case '0': zeroPad = true; break;
                case '#': prefixBaseX = true; break;
            }
        }

        // parameters may be null, undefined, empty-string or real valued
        // we want to ignore null, undefined and empty-string values
        if (!minWidth) {
            minWidth = 0;
        } else if (minWidth == '*') {
            minWidth = + _proxy_jslib_handle(a, (i++), 0, 0);
        } else if (minWidth.charAt(0) == '*') {
            minWidth = + _proxy_jslib_handle(a, (minWidth.slice(1, -1)), 0, 0);
        } else {
            minWidth = +minWidth;
        }

        // Note: undocumented perl feature:
        if (minWidth < 0) {
            minWidth = -minWidth;
            leftJustify = true;
        }

        if (!isFinite(minWidth)) {
            throw new (Error)('sprintf: (minimum-)width must be finite');
        }

        if (!precision) {
            precision = 'fFeE'.indexOf(type) > -1 ? 6 : (type == 'd') ? 0 : undefined;
        } else if (precision == '*') {
            precision = + _proxy_jslib_handle(a, (i++), 0, 0);
        } else if (precision.charAt(0) == '*') {
            precision = + _proxy_jslib_handle(a, (precision.slice(1, -1)), 0, 0);
        } else {
            precision = +precision;
        }

        // grab value using valueIndex if required?
         value= _proxy_jslib_assign_rval('', 'value', '=', ( valueIndex ?  _proxy_jslib_handle(a, (valueIndex.slice(0, -1)), 0, 0) :  _proxy_jslib_handle(a, (i++), 0, 0)), value);

        switch (type) {
            case 's': return formatString(String( _proxy_jslib_handle(null, 'value', value, 0, 0)), leftJustify, minWidth, precision, zeroPad, customPadChar);
            case 'c': return formatString(String.fromCharCode(+ _proxy_jslib_handle(null, 'value', value, 0, 0)), leftJustify, minWidth, precision, zeroPad);
            case 'b': return formatBaseX( _proxy_jslib_handle(null, 'value', value, 0, 0), 2, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
            case 'o': return formatBaseX( _proxy_jslib_handle(null, 'value', value, 0, 0), 8, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
            case 'x': return formatBaseX( _proxy_jslib_handle(null, 'value', value, 0, 0), 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
            case 'X': return formatBaseX( _proxy_jslib_handle(null, 'value', value, 0, 0), 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad).toUpperCase();
            case 'u': return formatBaseX( _proxy_jslib_handle(null, 'value', value, 0, 0), 10, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
            case 'i':
            case 'd':
                number = parseInt(+ _proxy_jslib_handle(null, 'value', value, 0, 0), 10);
                prefix = number < 0 ? '-' : positivePrefix;
                 value= _proxy_jslib_assign_rval('', 'value', '=', ( prefix + pad(String(Math.abs(number)), precision, '0', false)), value);
                return justify( _proxy_jslib_handle(null, 'value', value, 0, 0), prefix, leftJustify, minWidth, zeroPad);
            case 'e':
            case 'E':
            case 'f':
            case 'F':
            case 'g':
            case 'G':
                number = + _proxy_jslib_handle(null, 'value', value, 0, 0);
                prefix = number < 0 ? '-' : positivePrefix;
                method =  _proxy_jslib_handle(['toExponential', 'toFixed', 'toPrecision'], ('efg'.indexOf(type.toLowerCase())), 0, 0);
                textTransform =  _proxy_jslib_handle(['toString', 'toUpperCase'], ('eEfFgG'.indexOf(type) % 2), 0, 0);
                 value= _proxy_jslib_assign_rval('', 'value', '=', ( prefix +  _proxy_jslib_handle(Math.abs(number), (method), 1, 0)(precision)), value);
                return  _proxy_jslib_handle(justify( _proxy_jslib_handle(null, 'value', value, 0, 0), prefix, leftJustify, minWidth, zeroPad), (textTransform), 1, 0)();
            default: return substring;
        }
    };

    return  _proxy_jslib_handle(format, 'replace', '', 1, 0)(regex, doFormat);
}

 ;
_proxy_jslib_flush_write_buffers() ;