.\" Copyright 1993 David Metcalfe ([email protected])
.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Mon Mar 29 22:47:58 1993, David Metcalfe
.\" Modified Sat Jul 24 18:41:27 1993, Rik Faith ([email protected])
.TH QSORT 3  1993-03-29 "GNU" "Linux Programmer's Manual"
.SH NAME
qsort \- sorts an array
.SH SYNOPSIS
.nf
.B #include <stdlib.h>
.sp
.BI "void qsort(void *" base ", size_t " nmemb ", size_t " size ,
.in +\w'void qsort('u
.BI "int(*" compar ")(const void *, const void *));"
.in
.fi
.SH DESCRIPTION
The \fBqsort()\fP function sorts an array with \fInmemb\fP elements of
size \fIsize\fP.  The \fIbase\fP argument points to the start of the
array.
.PP
The contents of the array are sorted in ascending order according to a
comparison function pointed to by \fIcompar\fP, which is called with two
arguments that point to the objects being compared.
.PP
The comparison function must return an integer less than, equal to, or
greater than zero if the first argument is considered to be respectively
less than, equal to, or greater than the second.  If two members compare
as equal, their order in the sorted array is undefined.
.SH "RETURN VALUE"
The \fBqsort()\fP function returns no value.
.SH "CONFORMING TO"
SVID 3, POSIX, BSD 4.3, ISO 9899
.SH "SEE ALSO"
.BR sort (1)