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function sprintf() {
/*
* Copyright (c) 2013 Kevin van Zonneveld (http://kvz.io)
* and Contributors (http://phpjs.org/authors)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
// discuss at: http://phpjs.org/functions/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://kevin.vanzonneveld.net)
// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// improved by: Dj
// improved by: Allidylls
// input by: Paulo Freitas
// input by: Brett Zamir (http://brett-zamir.me)
// 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'
var regex = /%%|%(\d+\$)?([-+\'#0 ]*)(\*\d+\$|\*|\d+)?(\.(\*\d+\$|\*|\d+))?([scboxXuideEfFgG])/g;
var a = arguments;
var i = 0;
var format = a[i++];
// pad()
var pad = function (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;
};
// 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, prefix, method, textTransform, value;
if (substring === '%%') {
return '%';
}
// parse flags
var leftJustify = false;
var positivePrefix = '';
var zeroPad = false;
var prefixBaseX = false;
var 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;
customPadChar = '0';
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 : undefined;
} 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 = +value || 0;
// Plain Math.round doesn't just truncate
number = Math.round(number - number % 1);
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': // Should handle locales (as per setlocale)
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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