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#ifndef NFTABLES_UTILS_H
#define NFTABLES_UTILS_H
#include <asm/byteorder.h>
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <limits.h>
#include <list.h>
#include <gmputil.h>
#ifdef HAVE_VISIBILITY_HIDDEN
# define __visible __attribute__((visibility("default")))
# define EXPORT_SYMBOL(x) typeof(x) (x) __visible;
#else
# define EXPORT_SYMBOL
#endif
#define BITS_PER_BYTE 8
#define pr_debug(fmt, arg...) printf(fmt, ##arg)
#if defined(HAVE_LIBGMP)
#define pr_gmp_debug(fmt, arg...) gmp_printf(fmt, ##arg)
#else
#define pr_gmp_debug(fmt, arg...) ({ if (false) {}; 0; })
#endif
#define __fmtstring(x, y) __attribute__((format(printf, x, y)))
#define __must_check __attribute__((warn_unused_result))
#define __noreturn __attribute__((__noreturn__))
#define BUG(fmt, arg...) ({ fprintf(stderr, "BUG: " fmt "\n", ##arg); assert(0); abort(); })
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
#define __must_be_array(a) \
BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
#define assert_refcount_safe(refcnt) do { \
if ((refcnt) == 0) \
BUG("refcount was 0"); \
if ((refcnt) >= INT_MAX) \
BUG("refcount saturated"); \
} while (0)
#define container_of(ptr, type, member) ({ \
typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (void *)__mptr - offsetof(type,member) );})
/**
* Return a pointer to a constant variable of a size smaller than the variable.
*/
#ifdef __LITTLE_ENDIAN_BITFIELD
#define constant_data_ptr(val, len) \
((void *)&(val))
#elif defined(__BIG_ENDIAN_BITFIELD)
#define constant_data_ptr(val, len) \
((void *)&(val) + sizeof(val) - div_round_up(len, BITS_PER_BYTE))
#else
#error "byteorder undefined"
#endif
#define field_sizeof(t, f) (sizeof(((t *)NULL)->f))
#define array_size(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
#define div_round_up(n, d) (((n) + (d) - 1) / (d))
#define round_up(n, b) (div_round_up(n, b) * b)
#define min(_x, _y) ({ \
_x < _y ? _x : _y; })
#define max(_x, _y) ({ \
_x > _y ? _x : _y; })
#define SNPRINTF_BUFFER_SIZE(ret, len, offset) \
({ \
const int _ret = (ret); \
size_t *const _len = (len); \
size_t *const _offset = (offset); \
bool _not_truncated = true; \
size_t _ret2; \
\
assert(_ret >= 0); \
\
if ((size_t) _ret >= *_len) { \
/* Truncated.
*
* We will leave "len" at zero and increment
* "offset" to point one byte after the buffer
* (after the terminating NUL byte). */ \
_ret2 = *_len; \
_not_truncated = false; \
} else \
_ret2 = (size_t) _ret; \
\
*_offset += _ret2; \
*_len -= _ret2; \
\
_not_truncated; \
})
#define MSEC_PER_SEC 1000L
/**
* fls - find last (most-significant) bit set
* @x: the word to search
*
* This is defined the same way as ffs.
* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
*/
static inline int fls(uint32_t x)
{
int r = 32;
if (!x)
return 0;
if (!(x & 0xffff0000u)) {
x <<= 16;
r -= 16;
}
if (!(x & 0xff000000u)) {
x <<= 8;
r -= 8;
}
if (!(x & 0xf0000000u)) {
x <<= 4;
r -= 4;
}
if (!(x & 0xc0000000u)) {
x <<= 2;
r -= 2;
}
if (!(x & 0x80000000u)) {
x <<= 1;
r -= 1;
}
return r;
}
extern void __memory_allocation_error(const char *filename, uint32_t line) __noreturn;
#define memory_allocation_error() \
__memory_allocation_error(__FILE__, __LINE__);
extern void *xmalloc(size_t size);
extern void *xmalloc_array(size_t nmemb, size_t size);
extern void *xrealloc(void *ptr, size_t size);
extern void *xzalloc(size_t size);
extern void *xzalloc_array(size_t nmemb, size_t size);
extern char *xstrdup(const char *s);
extern void xstrunescape(const char *in, char *out);
extern int round_pow_2(unsigned int value);
#endif /* NFTABLES_UTILS_H */
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