Move memory helpers to their own module

index.js

@@ -2,24 +2,13 @@
 
 // Based on https://github.com/dchest/tweetnacl-js/blob/6dcbcaf5f5cbfd313f2dcfe763db35c828c8ff5b/nacl-fast.js.
 
-var sodium = module.exports
-
 // Ported in 2014 by Dmitry Chestnykh and Devi Mandiri.
 // Public domain.
 //
 // Implementation derived from TweetNaCl version 20140427.
 // See for details: http://tweetnacl.cr.yp.to/
 
-// also forwarded at the bottom but randombytes is non-enumerable
+forward(require('./memory'))
-
-sodium.sodium_memzero = function (arr) {
-  arr.fill(0)
-}
-
-sodium.sodium_malloc = function (n) {
-  return new Uint8Array(n)
-}
-
 forward(require('./crypto_box'))
 forward(require('./crypto_generichash'))
 forward(require('./crypto_hash'))

memory.js

@@ -0,0 +1,14 @@
+/* eslint-disable camelcase */
+
+function sodium_malloc (n) {
+  return new Uint8Array(n)
+}
+
+function sodium_memzero (arr) {
+  arr.fill(0)
+}
+
+module.exports = {
+  sodium_malloc,
+  sodium_memzero
+}