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'use strict';
module.exports = function sprintf() {
// discuss at: http://locutus.io/php/sprintf/
// original by: Ash Searle (http://hexmen.com/blog/)
// improved by: Michael White (http://getsprink.com)
// improved by: Jack
// improved by: Kevin van Zonneveld (http://kvz.io)
// improved by: Kevin van Zonneveld (http://kvz.io)
// improved by: Kevin van Zonneveld (http://kvz.io)
// improved by: Dj
// improved by: Allidylls
// input by: Paulo Freitas
// input by: Brett Zamir (http://brett-zamir.me)
// improved by: Rafał Kukawski (http://kukawski.pl)
// 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]'
// example 4: sprintf("%d", 123456789012345)
// returns 4: '123456789012345'
// example 5: sprintf('%-03s', 'E')
// returns 5: 'E00'
// example 6: sprintf('%+010d', 9)
// returns 6: '+000000009'
// example 7: sprintf('%+0\'@10d', 9)
// returns 7: '@@@@@@@@+9'
// example 8: sprintf('%.f', 3.14)
// returns 8: '3.140000'
// example 9: sprintf('%% %2$d', 1, 2)
// returns 9: '% 2'
var regex = /%%|%(?:(\d+)\$)?((?:[-+#0 ]|'[\s\S])*)(\d+)?(?:\.(\d*))?([\s\S])/g;
var args = arguments;
var i = 0;
var format = args[i++];
var _pad = function _pad(str, len, chr, leftJustify) {
if (!chr) {
chr = ' ';
}
var padding = str.length >= len ? '' : new Array(1 + len - str.length >>> 0).join(chr);
return leftJustify ? str + padding : padding + str;
};
var justify = function justify(value, prefix, leftJustify, minWidth, padChar) {
var diff = minWidth - value.length;
if (diff > 0) {
// when padding with zeros
// on the left side
// keep sign (+ or -) in front
if (!leftJustify && padChar === '0') {
value = [value.slice(0, prefix.length), _pad('', diff, '0', true), value.slice(prefix.length)].join('');
} else {
value = _pad(value, minWidth, padChar, leftJustify);
}
}
return value;
};
var _formatBaseX = function _formatBaseX(value, base, leftJustify, minWidth, precision, padChar) {
// Note: casts negative numbers to positive ones
var number = value >>> 0;
value = _pad(number.toString(base), precision || 0, '0', false);
return justify(value, '', leftJustify, minWidth, padChar);
};
// _formatString()
var _formatString = function _formatString(value, leftJustify, minWidth, precision, customPadChar) {
if (precision !== null && precision !== undefined) {
value = value.slice(0, precision);
}
return justify(value, '', leftJustify, minWidth, customPadChar);
};
// doFormat()
var doFormat = function doFormat(substring, argIndex, modifiers, minWidth, precision, specifier) {
var number, prefix, method, textTransform, value;
if (substring === '%%') {
return '%';
}
// parse modifiers
var padChar = ' '; // pad with spaces by default
var leftJustify = false;
var positiveNumberPrefix = '';
var j, l;
for (j = 0, l = modifiers.length; j < l; j++) {
switch (modifiers.charAt(j)) {
case ' ':
case '0':
padChar = modifiers.charAt(j);
break;
case '+':
positiveNumberPrefix = '+';
break;
case '-':
leftJustify = true;
break;
case "'":
if (j + 1 < l) {
padChar = modifiers.charAt(j + 1);
j++;
}
break;
}
}
if (!minWidth) {
minWidth = 0;
} else {
minWidth = +minWidth;
}
if (!isFinite(minWidth)) {
throw new Error('Width must be finite');
}
if (!precision) {
precision = specifier === 'd' ? 0 : 'fFeE'.indexOf(specifier) > -1 ? 6 : undefined;
} else {
precision = +precision;
}
if (argIndex && +argIndex === 0) {
throw new Error('Argument number must be greater than zero');
}
if (argIndex && +argIndex >= args.length) {
throw new Error('Too few arguments');
}
value = argIndex ? args[+argIndex] : args[i++];
switch (specifier) {
case '%':
return '%';
case 's':
return _formatString(value + '', leftJustify, minWidth, precision, padChar);
case 'c':
return _formatString(String.fromCharCode(+value), leftJustify, minWidth, precision, padChar);
case 'b':
return _formatBaseX(value, 2, leftJustify, minWidth, precision, padChar);
case 'o':
return _formatBaseX(value, 8, leftJustify, minWidth, precision, padChar);
case 'x':
return _formatBaseX(value, 16, leftJustify, minWidth, precision, padChar);
case 'X':
return _formatBaseX(value, 16, leftJustify, minWidth, precision, padChar).toUpperCase();
case 'u':
return _formatBaseX(value, 10, leftJustify, minWidth, precision, padChar);
case 'i':
case 'd':
number = +value || 0;
// Plain Math.round doesn't just truncate
number = Math.round(number - number % 1);
prefix = number < 0 ? '-' : positiveNumberPrefix;
value = prefix + _pad(String(Math.abs(number)), precision, '0', false);
if (leftJustify && padChar === '0') {
// can't right-pad 0s on integers
padChar = ' ';
}
return justify(value, prefix, leftJustify, minWidth, padChar);
case 'e':
case 'E':
case 'f': // @todo: Should handle locales (as per setlocale)
case 'F':
case 'g':
case 'G':
number = +value;
prefix = number < 0 ? '-' : positiveNumberPrefix;
method = ['toExponential', 'toFixed', 'toPrecision']['efg'.indexOf(specifier.toLowerCase())];
textTransform = ['toString', 'toUpperCase']['eEfFgG'.indexOf(specifier) % 2];
value = prefix + Math.abs(number)[method](precision);
return justify(value, prefix, leftJustify, minWidth, padChar)[textTransform]();
default:
// unknown specifier, consume that char and return empty
return '';
}
};
try {
return format.replace(regex, doFormat);
} catch (err) {
return false;
}
};
//# sourceMappingURL=sprintf.js.map
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