BSEARCH(3) BSD Programmer's Manual BSEARCH(3)
bsearch - binary search of a sorted table
bsearch(const void *key, const void *base, size_t nmemb, size_t size,
int (*compar) (const void *, const void *));
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 ob-
ject pointed to by key. The size of each member of the array is specified
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.
The bsearch() function returns a pointer to a matching member of the ar-
ray, or a null pointer if no match is found. If two members compare as
equal, which member is matched is unspecified.
db(3), lsearch(3), qsort(3),
The bsearch() function conforms to ANSI C X3.159-1989 (``ANSI C '').
4.4BSD April 19, 1994 1