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sprintf.js
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sprintf.js
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if(!dojo._hasResource["dojox.string.sprintf"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.string.sprintf"] = true;
dojo.provide("dojox.string.sprintf");
dojo.require("dojox.string.tokenize");
dojox.string.sprintf = function(/*String*/ format, /*mixed...*/ filler){
for(var args = [], i = 1; i < arguments.length; i++){
args.push(arguments[i]);
}
var formatter = new dojox.string.sprintf.Formatter(format);
return formatter.format.apply(formatter, args);
}
dojox.string.sprintf.Formatter = function(/*String*/ format){
var tokens = [];
this._mapped = false;
this._format = format;
this._tokens = dojox.string.tokenize(format, this._re, this._parseDelim, this);
}
dojo.extend(dojox.string.sprintf.Formatter, {
_re: /\%(?:\(([\w_]+)\)|([1-9]\d*)\$)?([0 +\-\#]*)(\*|\d+)?(\.)?(\*|\d+)?[hlL]?([\%scdeEfFgGiouxX])/g,
_parseDelim: function(mapping, intmapping, flags, minWidth, period, precision, specifier){
if(mapping){
this._mapped = true;
}
return {
mapping: mapping,
intmapping: intmapping,
flags: flags,
_minWidth: minWidth, // May be dependent on parameters
period: period,
_precision: precision, // May be dependent on parameters
specifier: specifier
};
},
_specifiers: {
b: {
base: 2,
isInt: true
},
o: {
base: 8,
isInt: true
},
x: {
base: 16,
isInt: true
},
X: {
extend: ["x"],
toUpper: true
},
d: {
base: 10,
isInt: true
},
i: {
extend: ["d"]
},
u: {
extend: ["d"],
isUnsigned: true
},
c: {
setArg: function(token){
if(!isNaN(token.arg)){
var num = parseInt(token.arg);
if(num < 0 || num > 127){
throw new Error("invalid character code passed to %c in sprintf");
}
token.arg = isNaN(num) ? "" + num : String.fromCharCode(num);
}
}
},
s: {
setMaxWidth: function(token){
token.maxWidth = (token.period == ".") ? token.precision : -1;
}
},
e: {
isDouble: true,
doubleNotation: "e"
},
E: {
extend: ["e"],
toUpper: true
},
f: {
isDouble: true,
doubleNotation: "f"
},
F: {
extend: ["f"]
},
g: {
isDouble: true,
doubleNotation: "g"
},
G: {
extend: ["g"],
toUpper: true
}
},
format: function(/*mixed...*/ filler){
if(this._mapped && typeof filler != "object"){
throw new Error("format requires a mapping");
}
var str = "";
var position = 0;
for(var i = 0, token; i < this._tokens.length; i++){
token = this._tokens[i];
if(typeof token == "string"){
str += token;
}else{
if(this._mapped){
if(typeof filler[token.mapping] == "undefined"){
throw new Error("missing key " + token.mapping);
}
token.arg = filler[token.mapping];
}else{
if(token.intmapping){
var position = parseInt(token.intmapping) - 1;
}
if(position >= arguments.length){
throw new Error("got " + arguments.length + " printf arguments, insufficient for '" + this._format + "'");
}
token.arg = arguments[position++];
}
if(!token.compiled){
token.compiled = true;
token.sign = "";
token.zeroPad = false;
token.rightJustify = false;
token.alternative = false;
var flags = {};
for(var fi = token.flags.length; fi--;){
var flag = token.flags.charAt(fi);
flags[flag] = true;
switch(flag){
case " ":
token.sign = " ";
break;
case "+":
token.sign = "+";
break;
case "0":
token.zeroPad = (flags["-"]) ? false : true;
break;
case "-":
token.rightJustify = true;
token.zeroPad = false;
break;
case "\#":
token.alternative = true;
break;
default:
throw Error("bad formatting flag '" + token.flags.charAt(fi) + "'");
}
}
token.minWidth = (token._minWidth) ? parseInt(token._minWidth) : 0;
token.maxWidth = -1;
token.toUpper = false;
token.isUnsigned = false;
token.isInt = false;
token.isDouble = false;
token.precision = 1;
if(token.period == '.'){
if(token._precision){
token.precision = parseInt(token._precision);
}else{
token.precision = 0;
}
}
var mixins = this._specifiers[token.specifier];
if(typeof mixins == "undefined"){
throw new Error("unexpected specifier '" + token.specifier + "'");
}
if(mixins.extend){
dojo.mixin(mixins, this._specifiers[mixins.extend]);
delete mixins.extend;
}
dojo.mixin(token, mixins);
}
if(typeof token.setArg == "function"){
token.setArg(token);
}
if(typeof token.setMaxWidth == "function"){
token.setMaxWidth(token);
}
if(token._minWidth == "*"){
if(this._mapped){
throw new Error("* width not supported in mapped formats");
}
token.minWidth = parseInt(arguments[position++]);
if(isNaN(token.minWidth)){
throw new Error("the argument for * width at position " + position + " is not a number in " + this._format);
}
// negative width means rightJustify
if (token.minWidth < 0) {
token.rightJustify = true;
token.minWidth = -token.minWidth;
}
}
if(token._precision == "*" && token.period == "."){
if(this._mapped){
throw new Error("* precision not supported in mapped formats");
}
token.precision = parseInt(arguments[position++]);
if(isNaN(token.precision)){
throw Error("the argument for * precision at position " + position + " is not a number in " + this._format);
}
// negative precision means unspecified
if (token.precision < 0) {
token.precision = 1;
token.period = '';
}
}
if(token.isInt){
// a specified precision means no zero padding
if(token.period == '.'){
token.zeroPad = false;
}
this.formatInt(token);
}else if(token.isDouble){
if(token.period != '.'){
token.precision = 6;
}
this.formatDouble(token);
}
this.fitField(token);
str += "" + token.arg;
}
}
return str;
},
_zeros10: '0000000000',
_spaces10: ' ',
formatInt: function(token) {
var i = parseInt(token.arg);
if(!isFinite(i)){ // isNaN(f) || f == Number.POSITIVE_INFINITY || f == Number.NEGATIVE_INFINITY)
// allow this only if arg is number
if(typeof token.arg != "number"){
throw new Error("format argument '" + token.arg + "' not an integer; parseInt returned " + i);
}
//return '' + i;
i = 0;
}
// if not base 10, make negatives be positive
// otherwise, (-10).toString(16) is '-a' instead of 'fffffff6'
if(i < 0 && (token.isUnsigned || token.base != 10)){
i = 0xffffffff + i + 1;
}
if(i < 0){
token.arg = (- i).toString(token.base);
this.zeroPad(token);
token.arg = "-" + token.arg;
}else{
token.arg = i.toString(token.base);
// need to make sure that argument 0 with precision==0 is formatted as ''
if(!i && !token.precision){
token.arg = "";
}else{
this.zeroPad(token);
}
if(token.sign){
token.arg = token.sign + token.arg;
}
}
if(token.base == 16){
if(token.alternative){
token.arg = '0x' + token.arg;
}
toke.art = token.toUpper ? token.arg.toUpperCase() : token.arg.toLowerCase();
}
if(token.base == 8){
if(token.alternative && token.arg.charAt(0) != '0'){
token.arg = '0' + token.arg;
}
}
},
formatDouble: function(token) {
var f = parseFloat(token.arg);
if(!isFinite(f)){ // isNaN(f) || f == Number.POSITIVE_INFINITY || f == Number.NEGATIVE_INFINITY)
// allow this only if arg is number
if(typeof token.arg != "number"){
throw new Error("format argument '" + token.arg + "' not a float; parseFloat returned " + f);
}
// C99 says that for 'f':
// infinity -> '[-]inf' or '[-]infinity' ('[-]INF' or '[-]INFINITY' for 'F')
// NaN -> a string starting with 'nan' ('NAN' for 'F')
// this is not commonly implemented though.
//return '' + f;
f = 0;
}
switch(token.doubleNotation) {
case 'e': {
token.arg = f.toExponential(token.precision);
break;
}
case 'f': {
token.arg = f.toFixed(token.precision);
break;
}
case 'g': {
// C says use 'e' notation if exponent is < -4 or is >= prec
// ECMAScript for toPrecision says use exponential notation if exponent is >= prec,
// though step 17 of toPrecision indicates a test for < -6 to force exponential.
if(Math.abs(f) < 0.0001){
//print("forcing exponential notation for f=" + f);
token.arg = f.toExponential(token.precision > 0 ? token.precision - 1 : token.precision);
}else{
token.arg = f.toPrecision(token.precision);
}
// In C, unlike 'f', 'gG' removes trailing 0s from fractional part, unless alternative format flag ("#").
// But ECMAScript formats toPrecision as 0.00100000. So remove trailing 0s.
if(!token.alternative){
//print("replacing trailing 0 in '" + s + "'");
token.arg = token.arg.replace(/(\..*[^0])0*/, "$1");
// if fractional part is entirely 0, remove it and decimal point
token.arg = token.arg.replace(/\.0*e/, 'e').replace(/\.0$/,'');
}
break;
}
default: throw new Error("unexpected double notation '" + token.doubleNotation + "'");
}
// C says that exponent must have at least two digits.
// But ECMAScript does not; toExponential results in things like "1.000000e-8" and "1.000000e+8".
// Note that s.replace(/e([\+\-])(\d)/, "e$10$2") won't work because of the "$10" instead of "$1".
// And replace(re, func) isn't supported on IE50 or Safari1.
token.arg = token.arg.replace(/e\+(\d)$/, "e+0$1").replace(/e\-(\d)$/, "e-0$1");
// Ensure a '0' before the period.
// Opera implements (0.001).toString() as '0.001', but (0.001).toFixed(1) is '.001'
if(dojo.isOpera){
token.arg = token.arg.replace(/^\./, '0.');
}
// if alt, ensure a decimal point
if(token.alternative){
token.arg = token.arg.replace(/^(\d+)$/,"$1.");
token.arg = token.arg.replace(/^(\d+)e/,"$1.e");
}
if(f >= 0 && token.sign){
token.arg = token.sign + token.arg;
}
token.arg = token.toUpper ? token.arg.toUpperCase() : token.arg.toLowerCase();
},
zeroPad: function(token, /*Int*/ length) {
length = (arguments.length == 2) ? length : token.precision;
if(typeof token.arg != "string"){
token.arg = "" + token.arg;
}
var tenless = length - 10;
while(token.arg.length < tenless){
token.arg = (token.rightJustify) ? token.arg + this._zeros10 : this._zeros10 + token.arg;
}
var pad = length - token.arg.length;
token.arg = (token.rightJustify) ? token.arg + this._zeros10.substring(0, pad) : this._zeros10.substring(0, pad) + token.arg;
},
fitField: function(token) {
if(token.maxWidth >= 0 && token.arg.length > token.maxWidth){
return token.arg.substring(0, token.maxWidth);
}
if(token.zeroPad){
this.zeroPad(token, token.minWidth);
return;
}
this.spacePad(token);
},
spacePad: function(token, /*Int*/ length) {
length = (arguments.length == 2) ? length : token.minWidth;
if(typeof token.arg != 'string'){
token.arg = '' + token.arg;
}
var tenless = length - 10;
while(token.arg.length < tenless){
token.arg = (token.rightJustify) ? token.arg + this._spaces10 : this._spaces10 + token.arg;
}
var pad = length - token.arg.length;
token.arg = (token.rightJustify) ? token.arg + this._spaces10.substring(0, pad) : this._spaces10.substring(0, pad) + token.arg;
}
});
}

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