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/*
* Copyright (c) 2009-2018 Richard Braun.
*
* 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.
*
* Upstream site with license notes :
* http://git.sceen.net/rbraun/librbraun.git/
*
*
* Helper macros.
*/
#ifndef MACROS_H
#define MACROS_H
#if !defined(__GNUC__) || (__GNUC__ < 4)
#error "GCC 4+ required"
#endif
#include <stddef.h>
#define MACRO_BEGIN ({
#define MACRO_END })
#define __QUOTE(x) #x
#define QUOTE(x) __QUOTE(x)
#define STRLEN(x) (sizeof(x) - 1)
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define DIV_CEIL(n, d) (((n) + (d) - 1) / (d))
#define P2ALIGNED(x, a) (((x) & ((a) - 1)) == 0)
#define ISP2(x) P2ALIGNED(x, x)
#define P2ALIGN(x, a) ((x) & -(a)) /* decreases if not aligned */
#define P2ROUND(x, a) (-(-(x) & -(a))) /* increases if not aligned */
#define P2END(x, a) (-(~(x) & -(a))) /* always increases */
#define structof(ptr, type, member) \
((type *)((char *)(ptr) - offsetof(type, member)))
#define likely(expr) __builtin_expect(!!(expr), 1)
#define unlikely(expr) __builtin_expect(!!(expr), 0)
#define barrier() asm volatile("" : : : "memory")
/*
* The following macros may be provided by the C environment.
*/
#ifndef __noinline
#define __noinline __attribute__((noinline))
#endif
#ifndef __aligned
#define __aligned(x) __attribute__((aligned(x)))
#endif
#ifndef __always_inline
#define __always_inline inline __attribute__((always_inline))
#endif
#ifndef __section
#define __section(x) __attribute__((section(x)))
#endif
#ifndef __packed
#define __packed __attribute__((packed))
#endif
#ifndef __unused
#define __unused __attribute__((unused))
#endif
#ifndef __used
#define __used __attribute__((used))
#endif
#ifndef __fallthrough
#if __GNUC__ >= 7
#define __fallthrough __attribute__((fallthrough))
#else /* __GNUC__ >= 7 */
#define __fallthrough
#endif /* __GNUC__ >= 7 */
#endif
#endif /* MACROS_H */
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