|File: [cvs.NetBSD.org] / src / lib / libc / stdlib / bsearch.3 (download)
Revision 1.8, Thu Feb 7 07:00:28 2002 UTC (18 years ago) by ross
CVS Tags: netbsd-1-6-base, netbsd-1-6-RELEASE, netbsd-1-6-RC3, netbsd-1-6-RC2, netbsd-1-6-RC1, netbsd-1-6-PATCH002-RELEASE, netbsd-1-6-PATCH002-RC4, netbsd-1-6-PATCH002-RC3, netbsd-1-6-PATCH002-RC2, netbsd-1-6-PATCH002-RC1, netbsd-1-6-PATCH002, netbsd-1-6-PATCH001-RELEASE, netbsd-1-6-PATCH001-RC3, netbsd-1-6-PATCH001-RC2, netbsd-1-6-PATCH001-RC1, netbsd-1-6-PATCH001, netbsd-1-6, nathanw_sa_before_merge, nathanw_sa_base, fvdl_fs64_base
Changes since 1.7: +2 -2
Generate <>& symbolically.
.\" $NetBSD: bsearch.3,v 1.8 2002/02/07 07:00:28 ross Exp $
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.\" from: @(#)bsearch.3 8.3 (Berkeley) 4/19/94
.Dd April 19, 1994
.Dt BSEARCH 3
.Nd binary search of a sorted table
.Fd #include \*[Lt]stdlib.h\*[Gt]
.Ft void *
.Fn bsearch "const void *key" "const void *base" "size_t nmemb" "size_t size" "int (*compar) (const void *, const void *)"
function searches an array of
objects, the initial member of which is
pointed to by
.Fa base ,
for a member that matches the object pointed to by
.Fa key .
The size of each member of the array is specified by
.Fa size .
The contents of the array should be in ascending sorted order according
to the comparison function referenced by
.Fa compar .
is expected to have
two arguments which point to the
object and to an array member, in that order, and should return an integer
less than, equal to, or greater than zero if the
object is found, respectively, to be less than, to match, or be
greater than the array member.
.Sh RETURN VALUES
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.
.Sh SEE ALSO
.Xr db 3 ,
.Xr lsearch 3 ,
.Xr qsort 3 ,
.Xr tsearch 3
function conforms to
.St -ansiC .