osf1 man page for bsearch

bsearch(3)						     Library Functions Manual							bsearch(3)

NAME
       bsearch - Performs a binary search

LIBRARY
       Standard C Library (libc)

SYNOPSIS
       #include <stdlib.h>

       void *bsearch(
	   const void *key,
	   const void *base,
	   size_t nmemb,
	   size_t size,
	   int (*compar)(const void *, const void *));

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       bsearch(): XSH5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS
       Target  of  search.  Points to the initial object in the array.	Specifies the number of elements in the array.	Specifies the byte size of
       each element of the array.  Points to the comparison function, which is called with two parameters that point to the key object and  to	an
       array member, in that order.

DESCRIPTION
       The bsearch() function does a binary search and returns a pointer in an array that indicates where an object is found.

       The  compar  comparison	function  is  called with two parameters that point to objects that are compared during the search.  This function
       returns an integer less than, equal to, or greater than 0 (zero) depending whether the object pointed to by the key parameter is considered
       to be less than, equal to, or greater than the array element.

NOTES
       [Tru64 UNIX]  The bsearch() function is reentrant, but care should be taken to ensure that the function supplied as argument compar is also
       reentrant.

RETURN VALUES
       Upon successful completion, the bsearch() function returns a pointer to a matching object in the array.	A NULL is returned when  no  match
       is found.  When two or more objects compare equally, the returned object is unspecified.

RELATED INFORMATION
       Functions: hsearch(3), lsearch(3), qsort(3), tsearch(3)

       Standards: standards(5) delim off

																	bsearch(3)