.\"	$NetBSD: prop_object.3,v 1.7 2008/04/30 13:10:46 martin Exp $
.\"
.\" Copyright (c) 2006 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jason R. Thorpe.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd August 21, 2006
.Dt PROP_OBJECT 3
.Os
.Sh NAME
.Nm prop_object ,
.Nm prop_object_retain ,
.Nm prop_object_release ,
.Nm prop_object_type ,
.Nm prop_object_equals ,
.Nm prop_object_iterator_next ,
.Nm prop_object_iterator_reset ,
.Nm prop_object_iterator_release
.Nd general property container object functions
.Sh LIBRARY
.Lb libprop
.Sh SYNOPSIS
.In libprop/proplib.h
.\"
.Ft void
.Fn prop_object_retain "prop_object_t obj"
.Ft void
.Fn prop_object_release "prop_object_t obj"
.\"
.Ft prop_type_t
.Fn prop_object_type "prop_object_t obj"
.Ft bool
.Fn prop_object_equals "prop_object_t obj1" "prop_object_t obj2"
.\"
.Ft prop_object_t
.Fn prop_object_iterator_next "prop_object_iterator_t iter"
.Ft void
.Fn prop_object_iterator_reset "prop_object_iterator_t iter"
.Ft void
.Fn prop_object_iterator_release "prop_object_iterator_t iter"
.Sh DESCRIPTION
The
.Nm prop_object
family of functions operate on all property container object types.
.Bl -tag -width ""
.It Fn prop_object_retain "prop_object_t obj"
Increment the reference count on an object.
.It Fn prop_object_release "prop_object_t obj"
Decrement the reference count on an object.
If the last reference is dropped, the object is freed.
.It Fn prop_object_type "prop_object_t obj"
Determine the type of the object.
Objects are one of the following types:
.Pp
.Bl -tag -width "PROP_TYPE_DICT_KEYSYM" -compact
.It Dv PROP_TYPE_BOOL
Boolean value
.Pq prop_bool_t
.It Dv PROP_TYPE_NUMBER
Number
.Pq prop_number_t
.It Dv PROP_TYPE_STRING
String
.Pq prop_string_t
.It Dv PROP_TYPE_DATA
Opaque data
.Pq prop_data_t
.It Dv PROP_TYPE_ARRAY
Array
.Pq prop_array_t
.It Dv PROP_TYPE_DICTIONARY
Dictionary
.Pq prop_dictionary_t
.It Dv PROP_TYPE_DICT_KEYSYM
Dictionary key symbol
.Pq prop_dictionary_keysym_t
.El
.Pp
If
.Fa obj
is
.Dv NULL ,
then
.Dv PROP_TYPE_UNKNOWN
is returned.
.It Fn prop_object_equals "prop_object_t obj1" "prop_object_t obj2"
Returns
.Dv true
if the two objects are of the same type and are equivalent.
.It Fn prop_object_iterator_next "prop_object_iterator_t iter"
Return the next object in the collection
.Pq array or dictionary
being iterated by the iterator
.Fa iter .
If there are no more objects in the collection,
.Dv NULL
is returned.
.It Fn prop_object_iterator_reset "prop_object_iterator_t iter"
Reset the iterator to the first object in the collection being iterated
by the iterator
.Fa iter .
.It Fn prop_object_iterator_release "prop_object_iterator_t iter"
Release the iterator
.Fa iter .
.El
.Sh SEE ALSO
.Xr prop_array 3 ,
.Xr prop_bool 3 ,
.Xr prop_data 3 ,
.Xr prop_dictionary 3 ,
.Xr prop_number 3 ,
.Xr prop_string 3 ,
.Xr proplib 3
.Sh HISTORY
The
.Nm proplib
property container object library first appeared in
.Nx 4.0 .