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var leadSection = ""
var trailSection = ""
var varName = ""
var formatSection = ""
var digits = 0
var digitZeros = 0
var decimals = 0
var decimalsZeros = 0
var decimalSymbol = "."
function splitFormatString(format) {
// we need to analyze the structure of the string first
// a typical notation is like this: "{distance:#00.0#} km", where
// "{" "}" variable limiters
// "distance" variable name, this will be discarded and has not effect
// "#" non-leading/-trailing zero character
// "0" leading/trailing zero character
// " km" additional text which will remain unchanged
leadSection = ""
trailSection = ""
varName = ""
formatSection = ""
var startPos = 0;
var searchStep = 0;
for(var i = 0; i < format.length; ++i)
{
// search for the opening "{"
if(searchStep === 0) {
if(format.charAt(i)==='{') {
leadSection = format.slice(startPos, i);
startPos = i + 1;
searchStep++;
}
}
// search for the ":" or the closing "}"
else if(searchStep === 1) {
if(format.charAt(i) === '}') {
formatSection = format.slice(startPos, i);
startPos = i + 1;
trailSection = format.slice(startPos)
break;
}
else if(format.charAt(i) === ':') {
varName = format.slice(startPos, i);
startPos = i + 1;
searchStep++;
}
}
else if(searchStep === 2) {
if(format.charAt(i) === '}') {
formatSection = format.slice(startPos, i);
startPos = i + 1;
trailSection = format.slice(startPos)
break;
}
}
}
// finally we need to create the formatting string for sprintf out of the formatSection
digits = 0;
digitZeros = 0;
decimals = 0;
decimalsZeros = 0;
searchStep = 0;
for(var i = 0; i < formatSection.length; ++i) {
if(searchStep === 0) {
if(formatSection.charAt(i) === '#') {
digits++;
}
else if(formatSection.charAt(i) === '0') {
digits++;
digitZeros++;
}
else if(formatSection.charAt(i) === '.' || formatSection.charAt(i) === ',') {
decimalSymbol = formatSection.charAt(i);
searchStep++;
}
}
else if(searchStep === 1) {
if(formatSection.charAt(i) === '#') {
decimals++;
}
else if(formatSection.charAt(i) === '0') {
decimals++;
decimalsZeros++;
}
}
}
}
function formatOutput(data)
{
// format the output, first the digits
var digitString = Math.floor(data).toString();
if(digitString.length < digitZeros) {
// zero pad the string
var temp = "";
for(var i = 0; i < digitZeros - digitString.length; ++i) {
temp += '0';
}
digitString = temp + digitString;
}
else {
digitString = digitString.slice(-digits);
}
var decimalString = (data - Math.floor(data)).toFixed(decimals).slice(2);
if (decimalString.length > decimalsZeros) {
for (var i = decimalString.length - 1; i >= decimalsZeros; i--)
{
if(decimalString.charAt(i) === '0')
{
decimalString = decimalString.slice(0, -1);
}
}
}
else {
for (var i = decimalString.length; i < decimalsZeros; i++)
{
decimalString += '0';
}
}
if (decimalString.length > 0) {
return leadSection + digitString + decimalSymbol + decimalString + trailSection;
}
else {
return leadSection + digitString + trailSection;
}
}
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