34 lines
793 B
JavaScript
34 lines
793 B
JavaScript
'use strict'
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const textDecoder = new TextDecoder()
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/**
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* @see https://encoding.spec.whatwg.org/#utf-8-decode
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* @param {Uint8Array} buffer
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*/
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function utf8DecodeBytes (buffer) {
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if (buffer.length === 0) {
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return ''
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}
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// 1. Let buffer be the result of peeking three bytes from
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// ioQueue, converted to a byte sequence.
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// 2. If buffer is 0xEF 0xBB 0xBF, then read three
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// bytes from ioQueue. (Do nothing with those bytes.)
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if (buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
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buffer = buffer.subarray(3)
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}
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// 3. Process a queue with an instance of UTF-8’s
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// decoder, ioQueue, output, and "replacement".
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const output = textDecoder.decode(buffer)
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// 4. Return output.
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return output
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}
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module.exports = {
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utf8DecodeBytes
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}
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