.\" Copyright (C) 2001 Information-technology Promotion Agency (IPA)
.\" Copyright (C) 2001-2003
.\"   National Institute of Advanced Industrial Science and Technology (AIST)
.\" This file si aprt of the m17n library documentation.
.\" Permission is granted to copy, distribute and/or modify this document
.\" under the terms of the GNU Free Documentation License, Version 1.2 or
.\" any later version published by the Free Software Foundation; with no
.\" Invariant Section, Front-Cover Texts "The m17n library documentation",
.\" and no Back-Cover Texts.  A copy of the license is included in the
.\" appendix entitled "GNU Free Documentation License".
.TH "mplist_push" 3m17n "14 Jul 2007" "" "Version 1.4.0" "" "The m17n Library" \" -*- nroff -*-
.ad l
.nh
.SH NAME
mplist_push - Add a property at the beginning of a property list. 


.SH SYNOPSIS
\fBMPlist\fP*
\fBmplist_push\fP (\fBMPlist\fP *
\fIplist\fP, \fBMSymbol\fP
\fIkey\fP, void *
\fIval\fP)


.SH DESCRIPTION
The
.ft B
mplist_push()
.ft R
function inserts at the beginning of property list
.ft B
plist
.ft R
a property whose key is
.ft B
key
.ft R
and value is
.ft B
val\fP.
.ft R
.PP
If
.ft B
key
.ft R
is a managing key,
.ft B
val
.ft R
must be a managed object. In this case, the reference count of
.ft B
val
.ft R
is incremented by one.
.PP
.SH RETURN VALUE
.PP.RS 4
If the operation was successful, this function returns
.ft B
plist\fP.
.ft R
Otherwise, it returns
.ft C
NULL\fP.
.ft R
.RE
.PP