23 lines
845 B
JavaScript
23 lines
845 B
JavaScript
import { makeBytes } from "./bytes.js"; // TODO handle bigger values than 32 bit
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// For now it's good enough because we only use these functions
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// sequential feed indexes.
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export function writeUint64LittleEndian(value, bytes = makeBytes(8)) {
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const dataView = new DataView(bytes.buffer);
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const valueLower32 = value & 0xffffffff;
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const littleEndian = true;
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dataView.setUint32(0, valueLower32, littleEndian);
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dataView.setUint32(4, 0, littleEndian);
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return bytes;
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}
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export function writeUint64BigEndian(value, bytes = makeBytes(8)) {
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const dataView = new DataView(bytes.buffer);
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const valueLower32 = value & 0xffffffff;
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dataView.setUint32(0, 0);
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dataView.setUint32(4, valueLower32);
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return bytes;
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}
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export function readUint64BigEndian(bytes) {
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const dataView = new DataView(bytes.buffer);
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return dataView.getUint32(4);
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} |