40 lines
1.2 KiB
Plaintext
40 lines
1.2 KiB
Plaintext
'use strict';
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var $TypeError = require('es-errors/type');
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var IsArray = require('./IsArray');
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var isByteValue = require('../helpers/isByteValue');
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// https://262.ecma-international.org/12.0/#sec-bytelistbitwiseop
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module.exports = function ByteListBitwiseOp(op, xBytes, yBytes) {
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if (op !== '&' && op !== '^' && op !== '|') {
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throw new $TypeError('Assertion failed: `op` must be `&`, `^`, or `|`');
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}
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if (!IsArray(xBytes) || !IsArray(yBytes) || xBytes.length !== yBytes.length) {
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throw new $TypeError('Assertion failed: `xBytes` and `yBytes` must be same-length sequences of byte values (an integer 0-255, inclusive)');
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}
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var result = [];
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for (var i = 0; i < xBytes.length; i += 1) {
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var xByte = xBytes[i];
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var yByte = yBytes[i];
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if (!isByteValue(xByte) || !isByteValue(yByte)) {
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throw new $TypeError('Assertion failed: `xBytes` and `yBytes` must be same-length sequences of byte values (an integer 0-255, inclusive)');
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}
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var resultByte;
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if (op === '&') {
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resultByte = xByte & yByte;
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} else if (op === '^') {
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resultByte = xByte ^ yByte;
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} else {
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resultByte = xByte | yByte;
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}
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result[result.length] = resultByte;
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}
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return result;
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};
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