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NetBSD 6.1.5 - man page for bsearch (netbsd section 3)

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BSEARCH(3)			   BSD Library Functions Manual 		       BSEARCH(3)

     bsearch -- binary search of a sorted table

     Standard C Library (libc, -lc)

     #include <stdlib.h>

     void *
     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 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.

     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

     db(3), lsearch(3), qsort(3), tsearch(3)

     The bsearch() function conforms to ANSI X3.159-1989 (``ANSI C89'').

BSD					  April 19, 1994				      BSD
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