[d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var $TypeError = require('es-errors/type');
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| 4 |
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| 5 | var hasOwnProperty = require('./HasOwnProperty');
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| 6 | var ToBigInt64 = require('./ToBigInt64');
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| 7 | var ToBigUint64 = require('./ToBigUint64');
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| 8 | var ToInt16 = require('./ToInt16');
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| 9 | var ToInt32 = require('./ToInt32');
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| 10 | var ToInt8 = require('./ToInt8');
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| 11 | var ToUint16 = require('./ToUint16');
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| 12 | var ToUint32 = require('./ToUint32');
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| 13 | var ToUint8 = require('./ToUint8');
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| 14 | var ToUint8Clamp = require('./ToUint8Clamp');
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| 15 |
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| 16 | var valueToFloat32Bytes = require('../helpers/valueToFloat32Bytes');
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| 17 | var valueToFloat64Bytes = require('../helpers/valueToFloat64Bytes');
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| 18 | var integerToNBytes = require('../helpers/integerToNBytes');
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| 19 |
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| 20 | var keys = require('object-keys');
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| 21 |
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| 22 | // https://262.ecma-international.org/11.0/#table-the-typedarray-constructors
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| 23 | var TypeToSizes = {
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| 24 | __proto__: null,
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| 25 | Int8: 1,
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| 26 | Uint8: 1,
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| 27 | Uint8C: 1,
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| 28 | Int16: 2,
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| 29 | Uint16: 2,
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| 30 | Int32: 4,
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| 31 | Uint32: 4,
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| 32 | BigInt64: 8,
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| 33 | BigUint64: 8,
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| 34 | Float32: 4,
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| 35 | Float64: 8
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| 36 | };
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| 37 |
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| 38 | var TypeToAO = {
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| 39 | __proto__: null,
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| 40 | Int8: ToInt8,
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| 41 | Uint8: ToUint8,
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| 42 | Uint8C: ToUint8Clamp,
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| 43 | Int16: ToInt16,
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| 44 | Uint16: ToUint16,
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| 45 | Int32: ToInt32,
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| 46 | Uint32: ToUint32,
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| 47 | BigInt64: ToBigInt64,
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| 48 | BigUint64: ToBigUint64
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| 49 | };
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| 50 |
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| 51 | // https://262.ecma-international.org/11.0/#sec-numerictorawbytes
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| 52 |
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| 53 | module.exports = function NumericToRawBytes(type, value, isLittleEndian) {
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| 54 | if (typeof type !== 'string' || !hasOwnProperty(TypeToSizes, type)) {
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| 55 | throw new $TypeError('Assertion failed: `type` must be a TypedArray element type: ' + keys(TypeToSizes));
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| 56 | }
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| 57 | if (typeof value !== 'number' && typeof value !== 'bigint') {
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| 58 | throw new $TypeError('Assertion failed: `value` must be a Number or a BigInt');
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| 59 | }
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| 60 | if (typeof isLittleEndian !== 'boolean') {
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| 61 | throw new $TypeError('Assertion failed: `isLittleEndian` must be a Boolean');
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| 62 | }
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| 63 |
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| 64 | if (type === 'Float32') { // step 1
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| 65 | return valueToFloat32Bytes(value, isLittleEndian);
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| 66 | } else if (type === 'Float64') { // step 2
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| 67 | return valueToFloat64Bytes(value, isLittleEndian);
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| 68 | } // step 3
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| 69 |
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| 70 | var n = TypeToSizes[type]; // step 3.a
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| 71 |
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| 72 | var convOp = TypeToAO[type]; // step 3.b
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| 73 |
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| 74 | var intValue = convOp(value); // step 3.c
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| 75 |
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| 76 | return integerToNBytes(intValue, n, isLittleEndian); // step 3.d, 3.e, 4
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| 77 | };
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