ircd::js: Add basic priv()/get() object manip functions.

include/ircd/js/get.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 Charybdis Development Team
+ * Copyright (C) 2016 Jason Volk <jason@zemos.net>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+#define HAVE_IRCD_JS_GET_H
+
+namespace ircd {
+namespace js   {
+
+inline bool
+get(const JS::HandleObject &obj,
+    const char *const name,
+    JS::MutableHandleValue ret)
+{
+	return JS_GetProperty(*cx, obj, name, ret);
+}
+
+inline bool
+get(const JS::HandleObject &obj,
+    const JS::HandleId &id,
+    JS::MutableHandleValue ret)
+{
+	return JS_GetPropertyById(*cx, obj, id, ret);
+}
+
+template<class key>
+JS::Value
+get(const JS::HandleObject &obj,
+    const key &k)
+{
+	JS::RootedValue ret(*cx);
+	get(obj, k, &ret);
+	return ret.get();
+}
+
+} // namespace js
+} // namespace ircd

include/ircd/js/js.h

@@ -65,6 +65,8 @@ JSVersion version(const char *const &v)          { return JS_StringToVersion(v);
 #include "error.h"
 #include "id.h"
 #include "string.h"
+#include "priv.h"
+#include "get.h"
 #include "for_each.h"
 #include "script.h"
 #include "debug.h"

include/ircd/js/priv.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016 Charybdis Development Team
+ * Copyright (C) 2016 Jason Volk <jason@zemos.net>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+#define HAVE_IRCD_JS_PRIV_H
+
+namespace ircd {
+namespace js   {
+
+IRCD_EXCEPTION(error, priv_error)
+
+template<class T = void>
+T &
+priv(const JS::HandleObject &obj,
+     const JSClass &jsc)
+{
+	const auto ret(JS_GetInstancePrivate(*cx, obj, &jsc, nullptr));
+	if(!ret)
+		throw priv_error("Object has no private data");
+
+	return *static_cast<T *>(ret);
+}
+
+template<class T = void>
+T &
+priv(const JS::HandleObject &obj)
+{
+	const auto jsc(JS_GetClass(obj));
+	if(unlikely(!jsc))
+		throw priv_error("Object has no JSClass");
+
+	return priv<T>(obj, jsc);
+}
+
+} // namespace js
+} // namespace ircd