diff options
Diffstat (limited to 'node_modules/core-js/library/modules/es6.number.to-fixed.js')
| -rw-r--r-- | node_modules/core-js/library/modules/es6.number.to-fixed.js | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/node_modules/core-js/library/modules/es6.number.to-fixed.js b/node_modules/core-js/library/modules/es6.number.to-fixed.js new file mode 100644 index 00000000..2bf78af9 --- /dev/null +++ b/node_modules/core-js/library/modules/es6.number.to-fixed.js @@ -0,0 +1,114 @@ +'use strict'; +var $export = require('./_export'); +var toInteger = require('./_to-integer'); +var aNumberValue = require('./_a-number-value'); +var repeat = require('./_string-repeat'); +var $toFixed = 1.0.toFixed; +var floor = Math.floor; +var data = [0, 0, 0, 0, 0, 0]; +var ERROR = 'Number.toFixed: incorrect invocation!'; +var ZERO = '0'; + +var multiply = function (n, c) { + var i = -1; + var c2 = c; + while (++i < 6) { + c2 += n * data[i]; + data[i] = c2 % 1e7; + c2 = floor(c2 / 1e7); + } +}; +var divide = function (n) { + var i = 6; + var c = 0; + while (--i >= 0) { + c += data[i]; + data[i] = floor(c / n); + c = (c % n) * 1e7; + } +}; +var numToString = function () { + var i = 6; + var s = ''; + while (--i >= 0) { + if (s !== '' || i === 0 || data[i] !== 0) { + var t = String(data[i]); + s = s === '' ? t : s + repeat.call(ZERO, 7 - t.length) + t; + } + } return s; +}; +var pow = function (x, n, acc) { + return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc); +}; +var log = function (x) { + var n = 0; + var x2 = x; + while (x2 >= 4096) { + n += 12; + x2 /= 4096; + } + while (x2 >= 2) { + n += 1; + x2 /= 2; + } return n; +}; + +$export($export.P + $export.F * (!!$toFixed && ( + 0.00008.toFixed(3) !== '0.000' || + 0.9.toFixed(0) !== '1' || + 1.255.toFixed(2) !== '1.25' || + 1000000000000000128.0.toFixed(0) !== '1000000000000000128' +) || !require('./_fails')(function () { + // V8 ~ Android 4.3- + $toFixed.call({}); +})), 'Number', { + toFixed: function toFixed(fractionDigits) { + var x = aNumberValue(this, ERROR); + var f = toInteger(fractionDigits); + var s = ''; + var m = ZERO; + var e, z, j, k; + if (f < 0 || f > 20) throw RangeError(ERROR); + // eslint-disable-next-line no-self-compare + if (x != x) return 'NaN'; + if (x <= -1e21 || x >= 1e21) return String(x); + if (x < 0) { + s = '-'; + x = -x; + } + if (x > 1e-21) { + e = log(x * pow(2, 69, 1)) - 69; + z = e < 0 ? x * pow(2, -e, 1) : x / pow(2, e, 1); + z *= 0x10000000000000; + e = 52 - e; + if (e > 0) { + multiply(0, z); + j = f; + while (j >= 7) { + multiply(1e7, 0); + j -= 7; + } + multiply(pow(10, j, 1), 0); + j = e - 1; + while (j >= 23) { + divide(1 << 23); + j -= 23; + } + divide(1 << j); + multiply(1, 1); + divide(2); + m = numToString(); + } else { + multiply(0, z); + multiply(1 << -e, 0); + m = numToString() + repeat.call(ZERO, f); + } + } + if (f > 0) { + k = m.length; + m = s + (k <= f ? '0.' + repeat.call(ZERO, f - k) + m : m.slice(0, k - f) + '.' + m.slice(k - f)); + } else { + m = s + m; + } return m; + } +}); |
