com32/include/syslinux/align.h

/* ----------------------------------------------------------------------- *
 *
 *   Copyright 2009 Intel Corporation; author H. Peter Anvin
 *
 *   Permission is hereby granted, free of charge, to any person
 *   obtaining a copy of this software and associated documentation
 *   files (the "Software"), to deal in the Software without
 *   restriction, including without limitation the rights to use,
 *   copy, modify, merge, publish, distribute, sublicense, and/or
 *   sell copies of the Software, and to permit persons to whom
 *   the Software is furnished to do so, subject to the following
 *   conditions:
 *
 *   The above copyright notice and this permission notice shall
 *   be included in all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *   OTHER DEALINGS IN THE SOFTWARE.
 *
 * ----------------------------------------------------------------------- */

#ifndef _SYSLINUX_ALIGN_H
#define _SYSLINUX_ALIGN_H

#include <stdint.h>

static inline uintptr_t __align_down(uintptr_t __p, uintptr_t __a)
{
    return __p & ~(__a - 1);
}

static inline uintptr_t __align_up(uintptr_t __p, uintptr_t __a)
{
    return (__p + __a - 1) & ~(__a - 1);
}

#define ALIGN_UP(p,a) ((__typeof__(p))__align_up((uintptr_t)(p), (a)))
#define ALIGN_DOWN(p,a) ((__typeof__(p))__align_down((uintptr_t)(p), (a)))
#define ALIGN_UP_FOR(p,t) ALIGN_UP(p,sizeof(t))
#define ALIGN_DOWN_FOR(p,t) ALIGN_DOWN(p,sizeof(t))

#endif /* _SYSLINUX_ALIGN_H */