edouard@3329: /* https://github.com/alexei/sprintf.js/blob/master/src/sprintf.js */
edouard@3329: /* global window, exports, define */
edouard@3329: 
edouard@3329: !function() {
edouard@3329:     'use strict'
edouard@3329: 
edouard@3329:     var re = {
edouard@3329:         not_string: /[^s]/,
edouard@3329:         not_bool: /[^t]/,
edouard@3329:         not_type: /[^T]/,
edouard@3329:         not_primitive: /[^v]/,
edouard@3329:         number: /[diefg]/,
edouard@3329:         numeric_arg: /[bcdiefguxX]/,
edouard@3329:         json: /[j]/,
edouard@3329:         not_json: /[^j]/,
edouard@3329:         text: /^[^\x25]+/,
edouard@3329:         modulo: /^\x25{2}/,
edouard@3329:         placeholder: /^\x25(?:([1-9]\d*)\$|\(([^)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-gijostTuvxX])/,
edouard@3329:         key: /^([a-z_][a-z_\d]*)/i,
edouard@3329:         key_access: /^\.([a-z_][a-z_\d]*)/i,
edouard@3329:         index_access: /^\[(\d+)\]/,
edouard@3329:         sign: /^[+-]/
edouard@3329:     }
edouard@3329: 
edouard@3329:     function sprintf(key) {
edouard@3329:         // arguments is not an array, but should be fine for this call
edouard@3329:         return sprintf_format(sprintf_parse(key), arguments)
edouard@3329:     }
edouard@3329: 
edouard@3329:     function vsprintf(fmt, argv) {
edouard@3329:         return sprintf.apply(null, [fmt].concat(argv || []))
edouard@3329:     }
edouard@3329: 
edouard@3329:     function sprintf_format(parse_tree, argv) {
edouard@3329:         var cursor = 1, tree_length = parse_tree.length, arg, output = '', i, k, ph, pad, pad_character, pad_length, is_positive, sign
edouard@3329:         for (i = 0; i < tree_length; i++) {
edouard@3329:             if (typeof parse_tree[i] === 'string') {
edouard@3329:                 output += parse_tree[i]
edouard@3329:             }
edouard@3329:             else if (typeof parse_tree[i] === 'object') {
edouard@3329:                 ph = parse_tree[i] // convenience purposes only
edouard@3329:                 if (ph.keys) { // keyword argument
edouard@3329:                     arg = argv[cursor]
edouard@3329:                     for (k = 0; k < ph.keys.length; k++) {
edouard@3329:                         if (arg == undefined) {
edouard@3329:                             throw new Error(sprintf('[sprintf] Cannot access property "%s" of undefined value "%s"', ph.keys[k], ph.keys[k-1]))
edouard@3329:                         }
edouard@3329:                         arg = arg[ph.keys[k]]
edouard@3329:                     }
edouard@3329:                 }
edouard@3329:                 else if (ph.param_no) { // positional argument (explicit)
edouard@3329:                     arg = argv[ph.param_no]
edouard@3329:                 }
edouard@3329:                 else { // positional argument (implicit)
edouard@3329:                     arg = argv[cursor++]
edouard@3329:                 }
edouard@3329: 
edouard@3329:                 if (re.not_type.test(ph.type) && re.not_primitive.test(ph.type) && arg instanceof Function) {
edouard@3329:                     arg = arg()
edouard@3329:                 }
edouard@3329: 
edouard@3329:                 if (re.numeric_arg.test(ph.type) && (typeof arg !== 'number' && isNaN(arg))) {
edouard@3329:                     throw new TypeError(sprintf('[sprintf] expecting number but found %T', arg))
edouard@3329:                 }
edouard@3329: 
edouard@3329:                 if (re.number.test(ph.type)) {
edouard@3329:                     is_positive = arg >= 0
edouard@3329:                 }
edouard@3329: 
edouard@3329:                 switch (ph.type) {
edouard@3329:                     case 'b':
edouard@3329:                         arg = parseInt(arg, 10).toString(2)
edouard@3329:                         break
edouard@3329:                     case 'c':
edouard@3329:                         arg = String.fromCharCode(parseInt(arg, 10))
edouard@3329:                         break
edouard@3329:                     case 'd':
edouard@3329:                     case 'i':
edouard@3329:                         arg = parseInt(arg, 10)
edouard@3329:                         break
edouard@3329:                     case 'j':
edouard@3329:                         arg = JSON.stringify(arg, null, ph.width ? parseInt(ph.width) : 0)
edouard@3329:                         break
edouard@3329:                     case 'e':
edouard@3329:                         arg = ph.precision ? parseFloat(arg).toExponential(ph.precision) : parseFloat(arg).toExponential()
edouard@3329:                         break
edouard@3329:                     case 'f':
edouard@3329:                         arg = ph.precision ? parseFloat(arg).toFixed(ph.precision) : parseFloat(arg)
edouard@3329:                         break
edouard@3329:                     case 'g':
edouard@3329:                         arg = ph.precision ? String(Number(arg.toPrecision(ph.precision))) : parseFloat(arg)
edouard@3329:                         break
edouard@3329:                     case 'o':
edouard@3329:                         arg = (parseInt(arg, 10) >>> 0).toString(8)
edouard@3329:                         break
edouard@3329:                     case 's':
edouard@3329:                         arg = String(arg)
edouard@3329:                         arg = (ph.precision ? arg.substring(0, ph.precision) : arg)
edouard@3329:                         break
edouard@3329:                     case 't':
edouard@3329:                         arg = String(!!arg)
edouard@3329:                         arg = (ph.precision ? arg.substring(0, ph.precision) : arg)
edouard@3329:                         break
edouard@3329:                     case 'T':
edouard@3329:                         arg = Object.prototype.toString.call(arg).slice(8, -1).toLowerCase()
edouard@3329:                         arg = (ph.precision ? arg.substring(0, ph.precision) : arg)
edouard@3329:                         break
edouard@3329:                     case 'u':
edouard@3329:                         arg = parseInt(arg, 10) >>> 0
edouard@3329:                         break
edouard@3329:                     case 'v':
edouard@3329:                         arg = arg.valueOf()
edouard@3329:                         arg = (ph.precision ? arg.substring(0, ph.precision) : arg)
edouard@3329:                         break
edouard@3329:                     case 'x':
edouard@3329:                         arg = (parseInt(arg, 10) >>> 0).toString(16)
edouard@3329:                         break
edouard@3329:                     case 'X':
edouard@3329:                         arg = (parseInt(arg, 10) >>> 0).toString(16).toUpperCase()
edouard@3329:                         break
edouard@3329:                 }
edouard@3329:                 if (re.json.test(ph.type)) {
edouard@3329:                     output += arg
edouard@3329:                 }
edouard@3329:                 else {
edouard@3329:                     if (re.number.test(ph.type) && (!is_positive || ph.sign)) {
edouard@3329:                         sign = is_positive ? '+' : '-'
edouard@3329:                         arg = arg.toString().replace(re.sign, '')
edouard@3329:                     }
edouard@3329:                     else {
edouard@3329:                         sign = ''
edouard@3329:                     }
edouard@3329:                     pad_character = ph.pad_char ? ph.pad_char === '0' ? '0' : ph.pad_char.charAt(1) : ' '
edouard@3329:                     pad_length = ph.width - (sign + arg).length
edouard@3329:                     pad = ph.width ? (pad_length > 0 ? pad_character.repeat(pad_length) : '') : ''
edouard@3329:                     output += ph.align ? sign + arg + pad : (pad_character === '0' ? sign + pad + arg : pad + sign + arg)
edouard@3329:                 }
edouard@3329:             }
edouard@3329:         }
edouard@3329:         return output
edouard@3329:     }
edouard@3329: 
edouard@3329:     var sprintf_cache = Object.create(null)
edouard@3329: 
edouard@3329:     function sprintf_parse(fmt) {
edouard@3329:         if (sprintf_cache[fmt]) {
edouard@3329:             return sprintf_cache[fmt]
edouard@3329:         }
edouard@3329: 
edouard@3329:         var _fmt = fmt, match, parse_tree = [], arg_names = 0
edouard@3329:         while (_fmt) {
edouard@3329:             if ((match = re.text.exec(_fmt)) !== null) {
edouard@3329:                 parse_tree.push(match[0])
edouard@3329:             }
edouard@3329:             else if ((match = re.modulo.exec(_fmt)) !== null) {
edouard@3329:                 parse_tree.push('%')
edouard@3329:             }
edouard@3329:             else if ((match = re.placeholder.exec(_fmt)) !== null) {
edouard@3329:                 if (match[2]) {
edouard@3329:                     arg_names |= 1
edouard@3329:                     var field_list = [], replacement_field = match[2], field_match = []
edouard@3329:                     if ((field_match = re.key.exec(replacement_field)) !== null) {
edouard@3329:                         field_list.push(field_match[1])
edouard@3329:                         while ((replacement_field = replacement_field.substring(field_match[0].length)) !== '') {
edouard@3329:                             if ((field_match = re.key_access.exec(replacement_field)) !== null) {
edouard@3329:                                 field_list.push(field_match[1])
edouard@3329:                             }
edouard@3329:                             else if ((field_match = re.index_access.exec(replacement_field)) !== null) {
edouard@3329:                                 field_list.push(field_match[1])
edouard@3329:                             }
edouard@3329:                             else {
edouard@3329:                                 throw new SyntaxError('[sprintf] failed to parse named argument key')
edouard@3329:                             }
edouard@3329:                         }
edouard@3329:                     }
edouard@3329:                     else {
edouard@3329:                         throw new SyntaxError('[sprintf] failed to parse named argument key')
edouard@3329:                     }
edouard@3329:                     match[2] = field_list
edouard@3329:                 }
edouard@3329:                 else {
edouard@3329:                     arg_names |= 2
edouard@3329:                 }
edouard@3329:                 if (arg_names === 3) {
edouard@3329:                     throw new Error('[sprintf] mixing positional and named placeholders is not (yet) supported')
edouard@3329:                 }
edouard@3329: 
edouard@3329:                 parse_tree.push(
edouard@3329:                     {
edouard@3329:                         placeholder: match[0],
edouard@3329:                         param_no:    match[1],
edouard@3329:                         keys:        match[2],
edouard@3329:                         sign:        match[3],
edouard@3329:                         pad_char:    match[4],
edouard@3329:                         align:       match[5],
edouard@3329:                         width:       match[6],
edouard@3329:                         precision:   match[7],
edouard@3329:                         type:        match[8]
edouard@3329:                     }
edouard@3329:                 )
edouard@3329:             }
edouard@3329:             else {
edouard@3329:                 throw new SyntaxError('[sprintf] unexpected placeholder')
edouard@3329:             }
edouard@3329:             _fmt = _fmt.substring(match[0].length)
edouard@3329:         }
edouard@3329:         return sprintf_cache[fmt] = parse_tree
edouard@3329:     }
edouard@3329: 
edouard@3329:     /**
edouard@3329:      * export to either browser or node.js
edouard@3329:      */
edouard@3329:     /* eslint-disable quote-props */
edouard@3329:     if (typeof exports !== 'undefined') {
edouard@3329:         exports['sprintf'] = sprintf
edouard@3329:         exports['vsprintf'] = vsprintf
edouard@3329:     }
edouard@3329:     if (typeof window !== 'undefined') {
edouard@3329:         window['sprintf'] = sprintf
edouard@3329:         window['vsprintf'] = vsprintf
edouard@3329: 
edouard@3329:         if (typeof define === 'function' && define['amd']) {
edouard@3329:             define(function() {
edouard@3329:                 return {
edouard@3329:                     'sprintf': sprintf,
edouard@3329:                     'vsprintf': vsprintf
edouard@3329:                 }
edouard@3329:             })
edouard@3329:         }
edouard@3329:     }
edouard@3329:     /* eslint-enable quote-props */
edouard@3329: }(); // eslint-disable-line