From 1ff1c9c0012e0b96fa1ba5a86e13ee18b9136be0 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Fri, 5 Dec 2025 23:30:34 +0100
Subject: [PATCH] Add JS_NewProxy

Repackage js_proxy_constructor as a public API that downstream projects
can use.

Fixes: https://github.com/quickjs-ng/quickjs/issues/1261
---
 quickjs.c | 20 +++++++++++---------
 quickjs.h |  2 ++
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/quickjs.c b/quickjs.c
index 5a15e00eb..6c1874840 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -48695,23 +48695,19 @@ static const JSClassExoticMethods js_proxy_exotic_methods = {
     .set_property = js_proxy_set,
 };
 
-static JSValue js_proxy_constructor(JSContext *ctx, JSValueConst this_val,
-                                    int argc, JSValueConst *argv)
+JSValue JS_NewProxy(JSContext *ctx, JSValueConst target, JSValueConst handler)
 {
-    JSValueConst target, handler;
-    JSValue obj;
     JSProxyData *s;
+    JSValue obj;
 
-    target = argv[0];
-    handler = argv[1];
     if (JS_VALUE_GET_TAG(target) != JS_TAG_OBJECT ||
-        JS_VALUE_GET_TAG(handler) != JS_TAG_OBJECT)
+        JS_VALUE_GET_TAG(handler) != JS_TAG_OBJECT) {
         return JS_ThrowTypeErrorNotAnObject(ctx);
-
+    }
     obj = JS_NewObjectProtoClass(ctx, JS_NULL, JS_CLASS_PROXY);
     if (JS_IsException(obj))
         return obj;
-    s = js_malloc(ctx, sizeof(JSProxyData));
+    s = js_malloc(ctx, sizeof(*s));
     if (!s) {
         JS_FreeValue(ctx, obj);
         return JS_EXCEPTION;
@@ -48725,6 +48721,12 @@ static JSValue js_proxy_constructor(JSContext *ctx, JSValueConst this_val,
     return obj;
 }
 
+static JSValue js_proxy_constructor(JSContext *ctx, JSValueConst this_val,
+                                    int argc, JSValueConst *argv)
+{
+    return JS_NewProxy(ctx, argv[0], argv[1]);
+}
+
 static JSValue js_proxy_revoke(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv, int magic,
                                JSValueConst *func_data)
diff --git a/quickjs.h b/quickjs.h
index b1ab008d9..c6dd0f4b6 100644
--- a/quickjs.h
+++ b/quickjs.h
@@ -862,6 +862,8 @@ JS_EXTERN bool JS_IsArray(JSValueConst val);
 JS_EXTERN bool JS_IsProxy(JSValueConst val);
 JS_EXTERN JSValue JS_GetProxyTarget(JSContext *ctx, JSValueConst proxy);
 JS_EXTERN JSValue JS_GetProxyHandler(JSContext *ctx, JSValueConst proxy);
+JS_EXTERN JSValue JS_NewProxy(JSContext *ctx, JSValueConst target,
+                              JSValueConst handler);
 
 JS_EXTERN JSValue JS_NewDate(JSContext *ctx, double epoch_ms);
 JS_EXTERN bool JS_IsDate(JSValueConst v);