| BSEARCH(3) | Library Functions Manual | BSEARCH(3) | 
bsearch —
#include <stdlib.h>
void *
  
  bsearch(const
    void *key, const void
    *base, size_t
    nmemb, size_t size,
    int (*compar) (const void *,
    const void *));
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.
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.
bsearch() function conforms to ANSI
  X3.159-1989 (“ANSI C89”).
| April 19, 1994 | NetBSD 9.3 |