1 | 'use strict';
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2 | var sign = require('../internals/math-sign');
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3 |
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4 | var abs = Math.abs;
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5 |
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6 | var EPSILON = 2.220446049250313e-16;
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7 | var INVERSE_EPSILON = 1 / EPSILON;
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8 |
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9 | var roundTiesToEven = function (n) {
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10 | return n + INVERSE_EPSILON - INVERSE_EPSILON;
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11 | };
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12 |
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13 | module.exports = function (x, FLOAT_EPSILON, FLOAT_MAX_VALUE, FLOAT_MIN_VALUE) {
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14 | var n = +x;
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15 | var absolute = abs(n);
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16 | var s = sign(n);
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17 | if (absolute < FLOAT_MIN_VALUE) return s * roundTiesToEven(absolute / FLOAT_MIN_VALUE / FLOAT_EPSILON) * FLOAT_MIN_VALUE * FLOAT_EPSILON;
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18 | var a = (1 + FLOAT_EPSILON / EPSILON) * absolute;
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19 | var result = a - (a - absolute);
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20 |
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21 | if (result > FLOAT_MAX_VALUE || result !== result) return s * Infinity;
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22 | return s * result;
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23 | };
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