minix/lib/libc/stdlib/bsearch.3
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

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.\" $NetBSD: bsearch.3,v 1.10 2003/08/07 16:43:38 agc Exp $
.\"
.\" Copyright (c) 1990, 1991, 1993, 1994
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.\" the American National Standards Committee X3, on Information
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.\"
.\" from: @(#)bsearch.3 8.3 (Berkeley) 4/19/94
.\"
.Dd April 19, 1994
.Dt BSEARCH 3
.Os
.Sh NAME
.Nm bsearch
.Nd binary search of a sorted table
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdlib.h
.Ft void *
.Fn bsearch "const void *key" "const void *base" "size_t nmemb" "size_t size" "int (*compar) (const void *, const void *)"
.Sh DESCRIPTION
The
.Fn bsearch
function searches an array of
.Fa nmemb
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 .
.Pp
The contents of the array should be in ascending sorted order according
to the comparison function referenced by
.Fa compar .
The
.Fa compar
routine
is expected to have
two arguments which point to the
.Fa 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
.Fa key
object is found, respectively, to be less than, to match, or be
greater than the array member.
.Sh RETURN VALUES
The
.Fn 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.
.Sh SEE ALSO
.Xr db 3 ,
.Xr lsearch 3 ,
.Xr qsort 3 ,
.Xr tsearch 3
.Sh STANDARDS
The
.Fn bsearch
function conforms to
.St -ansiC .