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.\"   Copyright (c) 1994-2006 Lars Wirzenius.  All rights reserved.
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.\" part of publib
.\" "@(#)publib-strutil:$Id: memoverlap.3,v 1.1 1994/02/05 17:09:24 liw Exp $"
.\"
.TH MEMOVERLAP 3pub "C Programmer's Manual" Publib "C Programmer's Manual"
.SH NAME
memoverlap \- check whether two memory blocks overlap
.SH SYNOPSIS
.nf
#include <publib.h>
int \fBmemoverlap\fR(const void *\fIt\fR, size_t \fIts\fR, const void *\fIs\fR, size_t \fIss\fR);
.SH DESCRIPTION
\fImemoverlap\fR checks whether the memory blocks \fIt\fR--(\fIt+ts-1\fR)
and \fIs\fR--(\fIs+ss-1\fR) overlap.  Neither pointer argument may be
NULL, but the sizes may be 0.  The memory blocks can be arbitrary, they
do not have to be part of the same array.  Therefore, this function hides
the unportable pointer comparison that one would otherwise rely on.
.SH "RETURN VALUE"
\fImemoverlap\fR returns 0 if the blocks do not overlap, and nonzero
if they do.
.SH "SEE ALSO"
publib(3)
.SH AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)