Unify JS memory segment API (#2533)

Binaryen.js now uses offset instead of byteOffset when inspecting
a memory segment, matching the arguments on memory segment
creation. Also adds inspection of the passive property.

Previously, one would specify { offset, data, passive } on creation
and get back { byteOffset, data } upon inspection. This PR unifies
both to the keys on creation while also adding the respective C-API
to retrieve passive status, which was missing.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/js/binaryen.js-post.js b/src/js/binaryen.js-post.js
index 54f21ed07..5857c21c9 100644
--- a/src/js/binaryen.js-post.js
+++ b/src/js/binaryen.js-post.js
@@ -2212,7 +2212,7 @@ function wrapModule(module, self) {
   }
   self['getMemorySegmentInfoByIndex'] = function(id) {
     return {
-      'byteOffset': Module['_BinaryenGetMemorySegmentByteOffset'](module, id),
+      'offset': Module['_BinaryenGetMemorySegmentByteOffset'](module, id),
       'data': (function(){
         var size = Module['_BinaryenGetMemorySegmentByteLength'](module, id);
         var ptr = _malloc(size);
@@ -2221,7 +2221,8 @@ function wrapModule(module, self) {
         res.set(new Uint8Array(buffer, ptr, size));
         _free(ptr);
         return res.buffer;
-      })()
+      })(),
+      'passive': Boolean(Module['_BinaryenGetMemorySegmentPassive'](module, id))
     };
   }
   self['setStart'] = function(start) {