NAME
bsearch —
binary search of a sorted
table
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 a
member that matches the object pointed to by key. The
size of each member of the array is specified by
size.
The contents of the array should be in ascending sorted order according to the comparison function referenced by compar. The compar routine is expected to have two arguments which point to the key object and to an array member, in that order, and should return an integer less than, equal to, or greater than zero if the key object is found, respectively, to be less than, to match, or be greater than the array member.
RETURN VALUES
The bsearch() function returns a pointer
to a matching member of the array, or a null pointer if no match is found.
If two members compare as equal, which member is matched is unspecified.
SEE ALSO
STANDARDS
The bsearch() function conforms to
ANSI X3.159-1989
(“ANSI C89”).