/*

 * Copyright (C) 2007 Red Hat, Inc. All rights reserved.

 *

 * This file is part of LVM2.

 *

 * This copyrighted material is made available to anyone wishing to use,

 * modify, copy, or redistribute it subject to the terms and conditions

 * of the GNU Lesser General Public License v.2.1.

 *

 * You should have received a copy of the GNU Lesser 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 DM_TOOLS_UTIL_H

#define DM_TOOLS_UTIL_H

#include "libdm/libdevmapper.h"

/*

 * GCC -fanalyzer has limitations in certain code patterns.

 */

#if defined(__GNUC__) && (__GNUC__ >= 13) && !defined(__clang__)

# define GCC_SUPPRESS_FD_WARNINGS \

  _Pragma("GCC diagnostic push") \

  _Pragma("GCC diagnostic ignored \"-Wanalyzer-fd-leak\"") \

  _Pragma("GCC diagnostic ignored \"-Wanalyzer-fd-use-without-check\"")

# define GCC_SUPPRESS_LEAK_WARNING \

  _Pragma("GCC diagnostic push") \

  _Pragma("GCC diagnostic ignored \"-Wanalyzer-malloc-leak\"")

# define GCC_SUPPRESS_BUFFER_WARNING \

  _Pragma("GCC diagnostic push") \

  _Pragma("GCC diagnostic ignored \"-Wanalyzer-use-after-free\"") \

  _Pragma("GCC diagnostic ignored \"-Wanalyzer-out-of-bounds\"")

# define GCC_UNSUPPRESS_WARNINGS \

  _Pragma("GCC diagnostic pop")

#else

# define GCC_SUPPRESS_FD_WARNINGS

# define GCC_SUPPRESS_LEAK_WARNING

# define GCC_SUPPRESS_BUFFER_WARNING

# define GCC_UNSUPPRESS_WARNINGS

#endif

#define min(a, b) ({ __typeof__(a) _a = (a); \

         __typeof__(b) _b = (b); \

         (void) (&_a == &_b); \

         _a < _b ? _a : _b; })

#define max(a, b) ({ __typeof__(a) _a = (a); \

         __typeof__(b) _b = (b); \

         (void) (&_a == &_b); \

         _a > _b ? _a : _b; })

#define is_power_of_2(n) ((n) && !((n) & ((n) - 1)))

/* Use wrapper for checked results */

static inline __attribute__((warn_unused_result))

  int _dm_strncpy(char *dest, const char *src, size_t n)

{

  return dm_strncpy(dest, src, n);

}

Unexecuted instantiation: libdm-common.c:_dm_strncpy

Unexecuted instantiation: libdm-file.c:_dm_strncpy

Unexecuted instantiation: libdm-string.c:_dm_strncpy

Unexecuted instantiation: dbg_malloc.c:_dm_strncpy

Unexecuted instantiation: pool.c:_dm_strncpy

Unexecuted instantiation: libdm-iface.c:_dm_strncpy

Unexecuted instantiation: bitset.c:_dm_strncpy

Unexecuted instantiation: list.c:_dm_strncpy

Unexecuted instantiation: libdm-timestamp.c:_dm_strncpy

/*

 * GCC 3.4 adds a __builtin_clz, which uses the count leading zeros (clz)

 * instruction on arches that have one. Provide a fallback using shifts

 * and comparisons for older compilers.

 */

#ifdef HAVE___BUILTIN_CLZ

#define clz(x) ((x) ? __builtin_clz((x)) : 32)

#else /* ifdef HAVE___BUILTIN_CLZ */

static inline unsigned _dm_clz(unsigned x)

{

  unsigned n;

  /* branchless: if (!x) return 32; if (x >> 31) return 0; */

  if ((int)x <= 0) return (~x >> 26) & 32;

  n = 1;

  if ((x >> 16) == 0) {

    n = n + 16;

    x = x << 16;

  }

  if ((x >> 24) == 0) {

    n = n + 8;

    x = x << 8;

  }

  if ((x >> 28) == 0) {

    n = n + 4;

    x = x << 4;

  }

  if ((x >> 30) == 0) {

    n = n + 2;

    x = x << 2;

  }

  n = n - (x >> 31);

  return n;

}

#define clz(x) _dm_clz((x))

#endif /* ifdef HAVE___BUILTIN_CLZ */

#ifdef HAVE___BUILTIN_CLZLL

#define clzll(x) ((x) ? __builtin_clzll((x)) : 64)

#else /* ifdef HAVE___BUILTIN_CLZLL */

static inline unsigned _dm_clzll(unsigned long long x)

{

  if (x <= 0xffffffff)

    return 32 + clz((unsigned) (x & 0xffffffff));

  return clz((unsigned)(x >> 32));

}

#define clzll(x) _dm_clzll((x))

#endif /* ifdef HAVE___BUILTIN_CLZLL */

#ifndef HAVE_FFS

#ifdef HAVE___BUILTIN_FFS

#define ffs(x) __builtin_ffs((x))

#else

#error ffs() not implemented!

#endif /* ifdef HAVE___BUILTIN_FFS */

#endif /* ifndef HAVE_FFS */

#define KERNEL_VERSION(major, minor, release) (((major) << 16) + ((minor) << 8) + (release))

/* Define some portable printing types */

#define PRIsize_t "zu"

#define PRIssize_t "zd"

#define PRIptrdiff_t "td"

#define PRIpid_t PRId32

/* For convenience */

#define FMTsize_t "%" PRIsize_t

#define FMTssize_t "%" PRIssize_t

#define FMTptrdiff_t "%" PRIptrdiff_t

#define FMTpid_t "%" PRIpid_t

#define FMTd8  "%" PRId8

#define FMTd16 "%" PRId16

#define FMTd32 "%" PRId32

#define FMTd64 "%" PRId64

#define FMTi8  "%" PRIi8

#define FMTi16 "%" PRIi16

#define FMTi32 "%" PRIi32

#define FMTi64 "%" PRIi64

#define FMTo8  "%" PRIo8

#define FMTo16 "%" PRIo16

#define FMTo32 "%" PRIo32

#define FMTo64 "%" PRIo64

#define FMTu8  "%" PRIu8

#define FMTu16 "%" PRIu16

#define FMTu32 "%" PRIu32

#define FMTu64 "%" PRIu64

#define FMTx8  "%" PRIx8

#define FMTx16 "%" PRIx16

#define FMTx32 "%" PRIx32

#define FMTx64 "%" PRIx64

#define FMTVGID "%." DM_TO_STRING(ID_LEN) "s"

#endif