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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var callBound = require('call-bound');
- var $RangeError = require('es-errors/range');
- var $SyntaxError = require('es-errors/syntax');
- var $TypeError = require('es-errors/type');
- var $BigInt = GetIntrinsic('%BigInt%', true);
- var hasOwnProperty = require('./HasOwnProperty');
- var IsArray = require('./IsArray');
- var IsBigIntElementType = require('./IsBigIntElementType');
- var IsUnsignedElementType = require('./IsUnsignedElementType');
- var bytesAsFloat16 = require('../helpers/bytesAsFloat16');
- var bytesAsFloat32 = require('../helpers/bytesAsFloat32');
- var bytesAsFloat64 = require('../helpers/bytesAsFloat64');
- var bytesAsInteger = require('../helpers/bytesAsInteger');
- var every = require('../helpers/every');
- var isByteValue = require('../helpers/isByteValue');
- var $reverse = callBound('Array.prototype.reverse');
- var $slice = callBound('Array.prototype.slice');
- var tableTAO = require('./tables/typed-array-objects');
- // https://262.ecma-international.org/15.0/#sec-rawbytestonumeric
- module.exports = function RawBytesToNumeric(type, rawBytes, isLittleEndian) {
- if (!hasOwnProperty(tableTAO.size, '$' + type)) {
- throw new $TypeError('Assertion failed: `type` must be a TypedArray element type');
- }
- if (!IsArray(rawBytes) || !every(rawBytes, isByteValue)) {
- throw new $TypeError('Assertion failed: `rawBytes` must be an Array of bytes');
- }
- if (typeof isLittleEndian !== 'boolean') {
- throw new $TypeError('Assertion failed: `isLittleEndian` must be a Boolean');
- }
- var elementSize = tableTAO.size['$' + type]; // step 1
- if (rawBytes.length !== elementSize) {
- // this assertion is not in the spec, but it'd be an editorial error if it were ever violated
- throw new $RangeError('Assertion failed: `rawBytes` must have a length of ' + elementSize + ' for type ' + type);
- }
- var isBigInt = IsBigIntElementType(type);
- if (isBigInt && !$BigInt) {
- throw new $SyntaxError('this environment does not support BigInts');
- }
- // eslint-disable-next-line no-param-reassign
- rawBytes = $slice(rawBytes, 0, elementSize);
- if (!isLittleEndian) {
- $reverse(rawBytes); // step 2
- }
- if (type === 'FLOAT16') { // step 3
- return bytesAsFloat16(rawBytes);
- }
- if (type === 'FLOAT32') { // step 4
- return bytesAsFloat32(rawBytes);
- }
- if (type === 'FLOAT64') { // step 5
- return bytesAsFloat64(rawBytes);
- }
- return bytesAsInteger(rawBytes, elementSize, IsUnsignedElementType(type), isBigInt);
- };
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