/** javascript sprintf function **/
function sprintf() {
if (!arguments || arguments.length < 1 || !RegExp) {
return;
}
var str = arguments[0];
var re = /([^%]*)%('.|0|\x20)?(-)?(\d+)?(\.\d+)?(%|b|c|d|u|f|o|s|x|X)(.*)/;
var a = b = [], numSubstitutions = 0, numMatches = 0;
while (a = re.exec(str)) {
var leftpart = a[1], pPad = a[2], pJustify = a[3], pMinLength = a[4];
var pPrecision = a[5], pType = a[6], rightPart = a[7];
numMatches++;
if (pType == '%') {
subst = '%';
} else {
numSubstitutions++;
if (numSubstitutions >= arguments.length) {
alert('Error! Not enough function arguments ('
+ (arguments.length - 1)
+ ', excluding the string)\n'
+ 'for the number of substitution parameters in string ('
+ numSubstitutions + ' so far).');
}
var param = arguments[numSubstitutions];
var pad = '';
if (pPad && pPad.substr(0, 1) == "'") {
pad = leftpart.substr(1, 1);
} else if (pPad) {
pad = pPad;
}
var justifyRight = true;
if (pJustify && pJustify === "-")
justifyRight = false;
var minLength = -1;
if (pMinLength)
minLength = parseInt(pMinLength);
var precision = -1;
if (pPrecision && pType == 'f') {
precision = parseInt(pPrecision.substring(1));
}
var subst = param;
switch (pType) {
case 'b':
subst = parseInt(param).toString(2);
break;
case 'c':
subst = String.fromCharCode(parseInt(param));
break;
case 'd':
subst = parseInt(param) ? parseInt(param) : 0;
break;
case 'u':
subst = Math.abs(param);
break;
case 'f':
subst = (precision > -1) ? Math.round(parseFloat(param)
* Math.pow(10, precision))
/ Math.pow(10, precision) : parseFloat(param);
break;
case 'o':
subst = parseInt(param).toString(8);
break;
case 's':
subst = param;
break;
case 'x':
subst = ('' + parseInt(param).toString(16)).toLowerCase();
break;
case 'X':
subst = ('' + parseInt(param).toString(16)).toUpperCase();
break;
}
var padLeft = minLength - subst.toString().length;
if (padLeft > 0) {
var arrTmp = new Array(padLeft + 1);
var padding = arrTmp.join(pad ? pad : " ");
} else {
var padding = "";
}
}
str = leftpart + padding + subst + rightPart;
}
return str;
}