re-add null termination in javascript

because older versions of emscripten don't support the length argument to
UTF8ToString.

1 files changed, 8 insertions, 0 deletions

diff --git a/javascript/olm_pre.js b/javascript/olm_pre.js
index 7153f7a..314d7da 100644
--- a/javascript/olm_pre.js
+++ b/javascript/olm_pre.js
@@ -30,6 +30,14 @@ if (typeof(OLM_OPTIONS) !== 'undefined') {
     }
 }
 
+/* The 'length' argument to Pointer_stringify doesn't work if the input
+ * includes characters >= 128, which makes Pointer_stringify unreliable. We
+ * could use it on strings which are known to be ascii, but that seems
+ * dangerous. Instead we add a NULL character to all of our strings and just
+ * use UTF8ToString.
+ */
+var NULL_BYTE_PADDING_LENGTH = 1;
+
 Module['onRuntimeInitialized'] = function() {
     OLM_ERROR = Module['_olm_error']();
     olm_exports["PRIVATE_KEY_LENGTH"] = Module['_olm_pk_private_key_length']();