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/* ****************************************************************************
 * stdarg.h -- Variable argument list management for SHC.
 *
 * Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
 *
 * This file is part of the 'all/compiler-renesas' module in libcarrot, an
 * experimental modular libc project.
 *
 * This file is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * This file 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 Lesser General Lesser Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this file. If not, see <http://www.gnu.org/licenses/>.
 * ************************************************************************* */
typedef char* __va_list;

/* (get the 4-aligned address) */

#define __va_ceil(_ADDR) \
	(va_list)(((__uintptr_t)(_ADDR) & ~3) + ((__uintptr_t)(_ADDR) & 3) ? 4 : 0)
#define __va_floor(_ADDR) \
	(va_list)((__uintptr_t)(_ADDR) & ~3)

/* Open and close a variable argument list. */

#define __stdarg_va_start(_AP, _PARAM) \
	(void)(_AP = __va_ceil((char*)&_PARAM + sizeof(_PARAM)))
#define __stdarg_va_end(_AP) (void)(_AP = NULL)

/* Obtain an argument from the variable argument list. */

#define __stdarg_va_arg(_AP, _TYPE) \
	(*(_TYPE*)(_AP = __va_ceil(_AP + sizeof(_TYPE)), \
		__va_floor(_AP - sizeof(_TYPE))))

/* Copy a variable argument list. */

#define __stdarg_va_copy(_D, _S) { _D = _S }