Handle DOMException names with embedded NUL correctly

Thanks to saghul for noticing.

Author: bptato

quickjs.c

@@ -57756,17 +57756,18 @@ static JSValue js_domexception_get_message(JSContext *ctx, JSValueConst this_val
 static JSValue js_domexception_get_code(JSContext *ctx, JSValueConst this_val)
 {
     JSDOMExceptionData *s;
-    const char *name;
+    const char *name, *it;
     int i;
+    size_t len;
 
     s = JS_GetOpaque2(ctx, this_val, JS_CLASS_DOM_EXCEPTION);
     if (!s)
         return JS_EXCEPTION;
     if (s->code == -1) {
-        name = JS_ToCString(ctx, s->name);
+        name = JS_ToCStringLen(ctx, &len, s->name);
         for (i = 0; i < countof(js_dom_exception_names_table); i++) {
-            if (js_dom_exception_names_table[i].name &&
-                !strcmp(js_dom_exception_names_table[i].name, name)) {
+            it = js_dom_exception_names_table[i].name;
+            if (it && !strcmp(it, name) && len == strlen(it)) {
                 s->code = i;
                 break;
             }

tests/test_domexception.js

@@ -3,6 +3,8 @@ import { assert, assertThrows } from "./assert.js";
 function test_code() {
 	let ex = new DOMException();
 	assert(ex.code, 0);
+	ex = new DOMException("", "HierarchyRequestError\0test");
+	assert(ex.code, 0);
 	ex = new DOMException("test", "HierarchyRequestError");
 	assert(ex.code, 3);
 	assert(ex.code, ex.HIERARCHY_REQUEST_ERR);