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/*
* Definitions of common constant and generic macros of libcryptsetup
*
* Copyright (C) 2009-2023 Red Hat, Inc. All rights reserved.
* Copyright (C) 2009-2023 Milan Broz
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _LIBCRYPTSETUP_MACROS_H
#define _LIBCRYPTSETUP_MACROS_H
/* to silent gcc -Wcast-qual for const cast */
#define CONST_CAST(x) (x)(uintptr_t)
/* to silent clang -Wcast-align when working with byte arrays */
#define VOIDP_CAST(x) (x)(void*)
#define UNUSED(x) (void)(x)
#ifndef ARRAY_SIZE
# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
#define BITFIELD_SIZE(BF_PTR) (sizeof(*(BF_PTR)) * 8)
#define MOVE_REF(x, y) \
do { \
__typeof__(x) *_px = &(x), *_py = &(y); \
*_px = *_py; \
*_py = NULL; \
} while (0)
#define FREE_AND_NULL(x) do { free(x); x = NULL; } while (0)
#define AT_LEAST(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
#define SHIFT_4K 12
#define SECTOR_SHIFT 9
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
#define MAX_SECTOR_SIZE 4096 /* min page size among all platforms */
#define ROUND_SECTOR(x) (((x) + SECTOR_SIZE - 1) / SECTOR_SIZE)
#define MISALIGNED(a, b) ((a) & ((b) - 1))
#define MISALIGNED_4K(a) MISALIGNED((a), 1 << SHIFT_4K)
#define MISALIGNED_512(a) MISALIGNED((a), 1 << SECTOR_SHIFT)
#define NOTPOW2(a) MISALIGNED((a), (a))
#define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
#define DEFAULT_MEM_ALIGNMENT 4096
#define DM_UUID_LEN 129
#define DM_BY_ID_PREFIX "dm-uuid-"
#define DM_BY_ID_PREFIX_LEN 8
#define DM_UUID_PREFIX "CRYPT-"
#define DM_UUID_PREFIX_LEN 6
#endif /* _LIBCRYPTSETUP_MACROS_H */
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