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45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
6 months ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.convertHeaderBufferToObj = exports.HEADER_LENGTH = void 0;
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exports.HEADER_LENGTH = 6;
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/**
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* For numbers less than 255, will ensure that their string representation is at least 8 characters long.
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*/
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const toOctetStr = (num) => {
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let str = Number(num).toString(2);
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while (str.length < 8) {
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str = `0${str}`;
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}
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return str;
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};
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/**
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* Converts a Buffer of any length to an Object representation of a Space Packet header, provided
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* the received data is in the correct format.
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* @param buf - The buffer containing the Space Packet Header Data
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*/
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const convertHeaderBufferToObj = (buf) => {
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const headerStr = Array.from(buf.slice(0, exports.HEADER_LENGTH)).reduce((accum, curr) => `${accum}${toOctetStr(curr)}`, '');
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const isVersion1 = headerStr.slice(0, 3) === '000';
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const versionNumber = isVersion1 ? 1 : 'UNKNOWN_VERSION';
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const type = Number(headerStr[3]);
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const secondaryHeader = Number(headerStr[4]);
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const apid = parseInt(headerStr.slice(5, 16), 2);
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const sequenceFlags = parseInt(headerStr.slice(16, 18), 2);
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const packetName = parseInt(headerStr.slice(18, 32), 2);
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const dataLength = parseInt(headerStr.slice(-16), 2) + 1;
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return {
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versionNumber,
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identification: {
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apid,
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secondaryHeader,
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type,
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},
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sequenceControl: {
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packetName,
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sequenceFlags,
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},
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dataLength,
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};
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};
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exports.convertHeaderBufferToObj = convertHeaderBufferToObj;
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