some progress

node_modules/saslprep/lib/memory-code-points.js

@@ -0,0 +1,39 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const bitfield = require('sparse-bitfield');
+
+/* eslint-disable-next-line security/detect-non-literal-fs-filename */
+const memory = fs.readFileSync(path.resolve(__dirname, '../code-points.mem'));
+let offset = 0;
+
+/**
+ * Loads each code points sequence from buffer.
+ * @returns {bitfield}
+ */
+function read() {
+  const size = memory.readUInt32BE(offset);
+  offset += 4;
+
+  const codepoints = memory.slice(offset, offset + size);
+  offset += size;
+
+  return bitfield({ buffer: codepoints });
+}
+
+const unassigned_code_points = read();
+const commonly_mapped_to_nothing = read();
+const non_ASCII_space_characters = read();
+const prohibited_characters = read();
+const bidirectional_r_al = read();
+const bidirectional_l = read();
+
+module.exports = {
+  unassigned_code_points,
+  commonly_mapped_to_nothing,
+  non_ASCII_space_characters,
+  prohibited_characters,
+  bidirectional_r_al,
+  bidirectional_l,
+};