diff options
Diffstat (limited to 'node_modules/core-js/modules/es6.number.to-fixed.js')
| -rw-r--r-- | node_modules/core-js/modules/es6.number.to-fixed.js | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/es6.number.to-fixed.js b/node_modules/core-js/modules/es6.number.to-fixed.js new file mode 100644 index 000000000..c54970d6a --- /dev/null +++ b/node_modules/core-js/modules/es6.number.to-fixed.js @@ -0,0 +1,113 @@ +'use strict'; +var $export = require('./_export') + , toInteger = require('./_to-integer') + , aNumberValue = require('./_a-number-value') + , repeat = require('./_string-repeat') + , $toFixed = 1..toFixed + , floor = Math.floor + , data = [0, 0, 0, 0, 0, 0] + , ERROR = 'Number.toFixed: incorrect invocation!' + , ZERO = '0'; + +var multiply = function(n, c){ + var i = -1 + , c2 = c; + while(++i < 6){ + c2 += n * data[i]; + data[i] = c2 % 1e7; + c2 = floor(c2 / 1e7); + } +}; +var divide = function(n){ + var i = 6 + , c = 0; + while(--i >= 0){ + c += data[i]; + data[i] = floor(c / n); + c = (c % n) * 1e7; + } +}; +var numToString = function(){ + var i = 6 + , s = ''; + while(--i >= 0){ + if(s !== '' || i === 0 || data[i] !== 0){ + var t = String(data[i]); + s = s === '' ? t : s + repeat.call(ZERO, 7 - t.length) + t; + } + } return s; +}; +var pow = function(x, n, acc){ + return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc); +}; +var log = function(x){ + var n = 0 + , x2 = x; + while(x2 >= 4096){ + n += 12; + x2 /= 4096; + } + while(x2 >= 2){ + n += 1; + x2 /= 2; + } return n; +}; + +$export($export.P + $export.F * (!!$toFixed && ( + 0.00008.toFixed(3) !== '0.000' || + 0.9.toFixed(0) !== '1' || + 1.255.toFixed(2) !== '1.25' || + 1000000000000000128..toFixed(0) !== '1000000000000000128' +) || !require('./_fails')(function(){ + // V8 ~ Android 4.3- + $toFixed.call({}); +})), 'Number', { + toFixed: function toFixed(fractionDigits){ + var x = aNumberValue(this, ERROR) + , f = toInteger(fractionDigits) + , s = '' + , m = ZERO + , e, z, j, k; + if(f < 0 || f > 20)throw RangeError(ERROR); + 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; + } +});
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