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construct/include/ircd/js/get.h

56 lines
2 KiB
C++

/*
* 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 {
// Get reserved data slots
JS::Value get(JSObject *const &obj, const reserved &id);
// Get private data slot
template<class T> T &get(JSObject *const &, priv_t);
value get(const object::handle &obj, const id::handle &id);
value get(const object::handle &obj, const id &id);
value get(const object::handle &obj, const uint32_t &idx);
value get(const object::handle &src, const char *const path);
} // namespace js
} // namespace ircd
template<class T>
T &
ircd::js::get(JSObject *const &obj,
priv_t)
{
if(unlikely(~flags(obj) & JSCLASS_HAS_PRIVATE))
throw error("get(priv): Object has no private slot");
auto *const vp(JS_GetPrivate(obj));
auto *const sp(reinterpret_cast<priv_ptr *>(vp));
if(unlikely(!sp || !*sp))
throw error("get(priv): Object has no private data set");
return *reinterpret_cast<T *>(sp->get());
}