update headers

ios/include/uberz/ReadableArchive.h

@@ -30,8 +30,8 @@ namespace filament::uberz {
 // offset fields into pointers.
 void convertOffsetsToPointers(struct ReadableArchive* archive);
 
-#pragma clang diagnostic push
-#pragma clang diagnostic warning "-Wpadded"
+UTILS_WARNING_PUSH
+UTILS_WARNING_ENABLE_PADDED
 
 // Precompiled set of materials bundled with a list of features flags that each material supports.
 // This is the readable counterpart to WriteableArchive.
@@ -72,7 +72,7 @@ struct ArchiveFlag {
     ArchiveFeature value;
 };
 
-#pragma clang diagnostic pop
+UTILS_WARNING_POP
 
 } // namespace filament::uberz
 

ios/include/uberz/WritableArchive.h

@@ -34,7 +34,10 @@ namespace filament::uberz {
 // Users do not need to access this class directly, they should go through gltfio.
 class WritableArchive {
 public:
-    WritableArchive(size_t materialCount) : mMaterials(materialCount) {}
+    WritableArchive(size_t materialCount) : mMaterials(uint32_t(materialCount)) {
+        assert(materialCount <= UINT_MAX);
+    }
+
     void addMaterial(const char* name, const uint8_t* package, size_t packageSize);
     void addSpecLine(std::string_view line);
     utils::FixedCapacityVector<uint8_t> serialize() const;