Initial commit

node_modules/@serialport/parser-spacepacket/dist/utils.js

@@ -0,0 +1,44 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.convertHeaderBufferToObj = exports.HEADER_LENGTH = void 0;
+exports.HEADER_LENGTH = 6;
+/**
+ * For numbers less than 255, will ensure that their string representation is at least 8 characters long.
+ */
+const toOctetStr = (num) => {
+    let str = Number(num).toString(2);
+    while (str.length < 8) {
+        str = `0${str}`;
+    }
+    return str;
+};
+/**
+ * Converts a Buffer of any length to an Object representation of a Space Packet header, provided
+ * the received data is in the correct format.
+ * @param buf - The buffer containing the Space Packet Header Data
+ */
+const convertHeaderBufferToObj = (buf) => {
+    const headerStr = Array.from(buf.slice(0, exports.HEADER_LENGTH)).reduce((accum, curr) => `${accum}${toOctetStr(curr)}`, '');
+    const isVersion1 = headerStr.slice(0, 3) === '000';
+    const versionNumber = isVersion1 ? 1 : 'UNKNOWN_VERSION';
+    const type = Number(headerStr[3]);
+    const secondaryHeader = Number(headerStr[4]);
+    const apid = parseInt(headerStr.slice(5, 16), 2);
+    const sequenceFlags = parseInt(headerStr.slice(16, 18), 2);
+    const packetName = parseInt(headerStr.slice(18, 32), 2);
+    const dataLength = parseInt(headerStr.slice(-16), 2) + 1;
+    return {
+        versionNumber,
+        identification: {
+            apid,
+            secondaryHeader,
+            type,
+        },
+        sequenceControl: {
+            packetName,
+            sequenceFlags,
+        },
+        dataLength,
+    };
+};
+exports.convertHeaderBufferToObj = convertHeaderBufferToObj;