ccan/ccan/asort/asort.h

#ifndef CCAN_ASORT_H
#define CCAN_ASORT_H
#include <ccan/typesafe_cb/typesafe_cb.h>
#include <stdlib.h>

/**
 * asort - sort an array of elements
 * @base: pointer to data to sort
 * @num: number of elements
 * @cmp: pointer to comparison function
 * @ctx: a context pointer for the cmp function
 *
 * This function does a sort on the given array.  The resulting array
 * will be in ascending sorted order by the provided comparison function.
 *
 * The @cmp function should exactly match the type of the @base and
 * @ctx arguments.  Otherwise it can take three const void *.
 */
#define asort(base, num, cmp, ctx)					\
_asort((base), (num), sizeof(*(base)),					\
       cast_if_type(int (*)(const void *, const void *, const void *),	\
		    (cmp), &*(cmp),					\
		    int (*)(const __typeof__(*(base)) *,		\
			    const __typeof__(*(base)) *,		\
			    __typeof__(ctx))), (ctx))

void _asort(void *base, size_t nmemb, size_t size,
	    int(*compar)(const void *, const void *, const void *),
	    const void *ctx);

#endif /* CCAN_ASORT_H */