add data crc

converters.js

@@ -1,10 +1,63 @@
+export const numberToBytes = (number, bitLength) => {
+  const byteCount = Math.ceil(bitLength/8);
+  const bytes = [];
+  for(let i = 0; i < byteCount; i++) {
+    bytes.push((number >> (8 * (byteCount - 1 - i))) & 0xFF);
+  }
+  return bytes;
+}
+export const numberToHex = (bitLength) => {
+  const digits = Math.ceil(bitLength / 4);
+  return (number) => '0x' + number.toString(16).padStart(digits, '0').toUpperCase();
+}
+
+export function numberToBits(number, bitLength) {
+  const bits = [];
+  for(let i = bitLength - 1; i >= 0; i--)
+    bits.push((number >> i) & 1);
+  return bits;
+}
+export function bytesToText(bytes) {
+  if(!(bytes instanceof ArrayBuffer || ArrayBuffer.isView(bytes))) {
+    bytes = new Uint8Array(bytes).buffer;
+  }
+  return new TextDecoder().decode(bytes);
+}
+export function bytesToBits(bytes) {
+  return bytes.reduce((bits, byte) => [
+      ...bits, 
+      ...byte.toString(2).padStart(8, '0').split('').map(Number)
+    ], []);
+}
+
+export function textToBytes(text) {
+  return new TextEncoder().encode(text);
+}
+export function textToBits(text) {
+  return bytesToBits(textToBytes(text));
+}
+
+export function bitsToText(bits) {
+  const bytes = new Uint8Array(bitsToBytes(bits));
+  return bytesToText(bytes.buffer);
+}
+export function bitsToBytes(bits) {
+  const bytes = [];
+  for(let i = 0; i < bits.length; i+= 8) {
+    bytes.push(parseInt(bits.slice(i, i + 8).join(''), 2));
+  }
+  return bytes;
+}
 export const bitsToInt = (bits, bitLength) => {
-  parseInt(bits
+  if(bits.length === 0) return 0;
+  if(bitLength <= 0) return 0;
+  return parseInt(bits
     // only grab the bits we need
     .slice(0, bitLength)
     // combine into string
     .join('')
     // Assume missing bits were zeros
-    .padEnd(bitLength, '0')
+    .padEnd(bitLength, '0'),
+    2
   );
 }