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/*
* Copyright (C) 2014-2015 Tobias Klauser <tklauser@distanz.ch>
* Copyright (C) 2009-2012 Daniel Borkmann
*
* This file is part of llmnrd.
*
* llmnrd 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, version 2 of the License.
*
* llmnrd 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 llmnrd. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef UTIL_H
#define UTIL_H
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "compiler.h"
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
/*
* min()/max() macros with strict type-checking.
* Taken from linux/kernel.h
*/
#undef min
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
#undef max
#define max(x, y) ({ \
typeof(x) _max1 = (x); \
typeof(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
static inline void __noreturn panic(const char *fmt, ...)
{
va_list vl;
va_start(vl, fmt);
vfprintf(stderr, fmt, vl);
va_end(vl);
exit(EXIT_FAILURE);
}
void *xmalloc(size_t size) __warn_unused_result;
void *xzalloc(size_t size) __warn_unused_result;
void *xrealloc(void *ptr, size_t size) __warn_unused_result;
char *xstrdup(const char *s) __warn_unused_result;
static inline bool xstreq(const char *str1, const char *str2)
{
size_t n = strlen(str1);
if (n != strlen(str2))
return false;
if (strncmp(str1, str2, n) != 0)
return false;
return true;
}
#endif /* UTIL_H */
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