#pragma once
// nullpo.hpp - Non-fatal pointer assertions.
//
// Copyright © ????-2004 Athena Dev Teams
// Copyright © 2004-2011 The Mana World Development Team
// Copyright © 2011-2014 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
/// Uncomment this to live dangerously
/// (really exist to detect mostly-unused variables)
//# define BUG_FREE
/// All functions print to standard error (was: standard output)
/// nullpo_retn(cond) - return nullptr if given pointer is nullptr
/// nullpo_retz(cond) - return 0 if given pointer is nullptr
/// nullpo_retv(cond) - just return (function returns void)
/// nullpo_retr(rv, cond) - return given value instead
#ifndef BUG_FREE
# define nullpo_retr(ret, t) \
if (nullpo_chk(__FILE__, __LINE__, __PRETTY_FUNCTION__, t)) \
return ret;
#else // BUG_FREE
# define nullpo_retr(ret, t) /*t*/
#endif // BUG_FREE
#define nullpo_retn(t) nullpo_retr(nullptr, t)
#define nullpo_retz(t) nullpo_retr(0, t)
#define nullpo_retv(t) nullpo_retr(, t)
#include "fwd.hpp"
namespace tmwa
{
/// Used by macros in this header
bool nullpo_chk(const char *file, int line, const char *func,
const void *target);
template<class T>
bool nullpo_chk(const char *file, int line, const char *func, Borrowed<T> target) = delete;
template<class T>
bool nullpo_chk(const char *file, int line, const char *func, T target)
{
return nullpo_chk(file, line, func, target.operator->());
}
template<class T>
bool nullpo_chk(const char *file, int line, const char *func, T *target)
{
return nullpo_chk(file, line, func, static_cast<const void *>(target));
}
} // namespace tmwa
