32 lines
916 B
JavaScript
32 lines
916 B
JavaScript
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/* eslint-disable import/prefer-default-export */
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// Extracts buffer from given source and optionally clones it
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export const extractBuffer = (source, clone = false) => {
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// Source is a byte-aware object
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if (source && typeof source.byteLength !== 'undefined') {
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// Determine whether source is a view or a raw buffer
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if (typeof source.buffer !== 'undefined') {
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return clone ? source.buffer.slice(0) : source.buffer;
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}
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return clone ? source.slice(0) : source;
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}
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// Source is a sequence of bytes
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if (source && typeof source.length !== 'undefined') {
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// Although Uint8Array's constructor succeeds when given strings,
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// it does not correctly instantiate the buffer
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if (source.constructor === String) {
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return null;
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}
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try {
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return (new Uint8Array(source)).buffer;
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} catch (error) {
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return null;
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}
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}
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// No buffer found
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return null;
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};
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