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