BSEARCH(3)BSEARCH(3)NAMEbsearch - perform a binary search
SYNOPSIS
#include <stdlib.h>
void bsearch(const void *key,
const void *base,
size_t nmemb,
size_t size,
int (*compar)(const void *, const void *));
DESCRIPTION
The bsearch function searches an array of nmemb objects, the initial
member of which is pointed to by base, for an element that matches the
object pointed to by key. The size of each element of the array is
specified by size.
The comparison function pointed to by compar is called with two
arguments that point to the key object and to an array element, in that
order. Bsearch returns an integer less than, equal to, or greater than
zero if the key object is considered, respectively, to be less than, to
match, or to be greater than the array element. The array shall
consist of: all the elements that compare less than, all the objects
that compare equal to and all the objects that compare greater than the
key object, in that order.
RETURN VALUE
Bsearch returns a pointer to a matching element of the array, or a null
pointer if no match is found. If two elements compare as equal, it is
indeterminate which element will be matched.
SEE ALSOqsort(3)STANDARDS
The bsearch function conforms to ANSI-C.
7th Edition August 1, 1992 BSEARCH(3)
