stuff

MaterialX/source/JsMaterialX/JsMaterialXCore/JsExceptions.cpp

@@ -0,0 +1,54 @@
+//
+// Copyright Contributors to the MaterialX Project
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include <emscripten/bind.h>
+
+#include <exception>
+#include <string>
+
+namespace ems = emscripten;
+
+namespace jsexceptions
+{
+std::string getExceptionMessage(ems::val exceptionLike)
+{
+    try
+    {
+        const std::string type = exceptionLike.typeOf().as<std::string>();
+        if (type == "number")
+        {
+            // Legacy: numeric pointer to std::exception
+            int exceptionPtr = exceptionLike.as<int>();
+            return std::string(reinterpret_cast<std::exception *>(exceptionPtr)->what());
+        }
+        if (type == "string")
+        {
+            return exceptionLike.as<std::string>();
+        }
+        if (type == "object")
+        {
+            // Try typical Error-like object with a message property
+            bool hasMessage = false;
+            try { hasMessage = exceptionLike.call<bool>("hasOwnProperty", std::string("message")); } catch (...) {}
+            if (hasMessage)
+            {
+                return exceptionLike["message"].as<std::string>();
+            }
+            // Fallback to toString()
+            try { return exceptionLike.call<std::string>("toString"); } catch (...) {}
+        }
+    }
+    catch (...)
+    {
+        // Fall through to default
+    }
+    return std::string("Unknown exception");
+}
+} // namespace jsexceptions
+
+EMSCRIPTEN_BINDINGS(exceptions)
+{
+    ems::function("getExceptionMessage", &jsexceptions::getExceptionMessage);
+}