node_modules ignore

server/node_modules/crc/crc1.js

@@ -0,0 +1,20 @@
+import { Buffer } from 'buffer';
+import createBuffer from './create_buffer';
+import defineCrc from './define_crc';
+
+const crc1 = defineCrc('crc1', function(buf, previous) {
+  if (!Buffer.isBuffer(buf)) buf = createBuffer(buf);
+
+  let crc = ~~previous;
+  let accum = 0;
+
+  for (let index = 0; index < buf.length; index++) {
+    const byte = buf[index];
+    accum += byte;
+  }
+
+  crc += accum % 256;
+  return crc % 256;
+});
+
+export default crc1;