--- /dev/null
+
+
+function sprintf( ) {
+ // Return a formatted string
+ //
+ // version: 903.3016
+ // discuss at: http://phpjs.org/functions/sprintf
+ // + 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://brettz9.blogspot.com)
+ // + 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 = a[i++];
+
+ // 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 - value.length;
+ if (diff > 0) {
+ if (leftJustify || !zeroPad) {
+ value = pad(value, minWidth, customPadChar, leftJustify);
+ } else {
+ value = value.slice(0, prefix.length) + pad('', diff, '0', true) + value.slice(prefix.length);
+ }
+ }
+ return value;
+ };
+
+ // formatBaseX()
+ var formatBaseX = function(value, base, prefix, leftJustify, minWidth, precision, zeroPad) {
+ // Note: casts negative numbers to positive ones
+ var number = value >>> 0;
+ prefix = prefix && number && {'2': '0b', '8': '0', '16': '0x'}[base] || '';
+ value = prefix + pad(number.toString(base), precision || 0, '0', false);
+ return justify(value, prefix, leftJustify, minWidth, zeroPad);
+ };
+
+ // formatString()
+ var formatString = function(value, leftJustify, minWidth, precision, zeroPad, customPadChar) {
+ if (precision != null) {
+ value = value.slice(0, precision);
+ }
+ return justify(value, '', 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 = +a[i++];
+ } else if (minWidth.charAt(0) == '*') {
+ minWidth = +a[minWidth.slice(1, -1)];
+ } 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 : void(0);
+ } else if (precision == '*') {
+ precision = +a[i++];
+ } else if (precision.charAt(0) == '*') {
+ precision = +a[precision.slice(1, -1)];
+ } else {
+ precision = +precision;
+ }
+
+ // grab value using valueIndex if required?
+ value = valueIndex ? a[valueIndex.slice(0, -1)] : a[i++];
+
+ switch (type) {
+ case 's': return formatString(String(value), leftJustify, minWidth, precision, zeroPad, customPadChar);
+ case 'c': return formatString(String.fromCharCode(+value), leftJustify, minWidth, precision, zeroPad);
+ case 'b': return formatBaseX(value, 2, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
+ case 'o': return formatBaseX(value, 8, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
+ case 'x': return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
+ case 'X': return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad).toUpperCase();
+ case 'u': return formatBaseX(value, 10, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
+ case 'i':
+ case 'd': {
+ number = parseInt(+value);
+ prefix = number < 0 ? '-' : positivePrefix;
+ value = prefix + pad(String(Math.abs(number)), precision, '0', false);
+ return justify(value, prefix, leftJustify, minWidth, zeroPad);
+ }
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'F':
+ case 'g':
+ case 'G': {
+ number = +value;
+ prefix = number < 0 ? '-' : positivePrefix;
+ method = ['toExponential', 'toFixed', 'toPrecision']['efg'.indexOf(type.toLowerCase())];
+ textTransform = ['toString', 'toUpperCase']['eEfFgG'.indexOf(type) % 2];
+ value = prefix + Math.abs(number)[method](precision);
+ return justify(value, prefix, leftJustify, minWidth, zeroPad)[textTransform]();
+ }
+ default: return substring;
+ }
+ };
+
+ return format.replace(regex, doFormat);
+}
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