#ifndef UTILS_H_SAT_FEB__2_02_24_05_2008
#define UTILS_H_SAT_FEB__2_02_24_05_2008

#include <stddef.h>


#define SIZEOF_ARRAY(arr)        (sizeof(arr) / sizeof(arr[0]))
#define FOREACH(ptr, array)      for (ptr = array; ptr < array + SIZEOF_ARRAY(array); ptr++)
#define FOREACH_REV(ptr, array)  for (ptr = array + SIZEOF_ARRAY(array) - 1; ptr >= array; ptr--)


/**
 * container_of - cast a member of a structure out to the containing structure
 * @ptr:	the pointer to the member.
 * @type:	the type of the container struct this is embedded in.
 * @member:	the name of the member within the struct.
 *
 */
#define container_of(ptr, type, member) ({			\
	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
	(type *)( (char *)__mptr - offsetof(type,member) );})

#define free_null(p) if (!(p)) ; else free (p)

/* vim:set tabstop=4 softtabstop=4 shiftwidth=4: */
/* vim:set foldmethod=marker foldlevel=32 foldmarker={,}: */
#endif /* UTILS_H_SAT_FEB__2_02_24_05_2008 */