'\" te
.\" Copyright (c) 2000, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH PTREE_WALK_TREE_BY_CLASS 3PICLTREE "Aug 1, 2000"
.SH NAME
ptree_walk_tree_by_class \- walk subtree by class
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... \fB-lpicltree\fR [ \fIlibrary\fR... ]
#include <picltree.h>

\fBint\fR \fBptree_walk_tree_by_class\fR(\fBpicl_nodehdl_t\fR \fIrooth\fR,
     \fBconst char *\fR\fIclassname\fR, \fBvoid *\fR\fIc_args\fR,
     \fBint (*\fR\fIcallback\fR)(picl_nodehdl_t \fInodeh\fR, void *\fIc_args\fR));
.fi

.SH DESCRIPTION
.sp
.LP
The \fBptree_walk_tree_by_class()\fR function visits all the nodes of the
subtree under the node specified by \fIrooth\fR. The PICL class name of the
visited node is compared with the class name specified by \fIclassname\fR. If
the class names match, the callback function specified by \fIcallback\fR is
called with the matching node handle and the argument provided in \fIc_args\fR.
If the class name specified in \fIclassname\fR is \fINULL\fR, then the callback
function is invoked for all the nodes.
.sp
.LP
The return value from the callback function is used to determine whether to
continue or terminate the tree walk. The callback function returns
\fBPICL_WALK_CONTINUE\fR or \fBPICL_WALK_TERMINATE\fR to continue or terminate
the tree walk.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fB0\fR is returned. On failure, a non-negative
integer is returned to indicate an error.
.SH ERRORS
.sp
.ne 2
.na
\fB\fBPICL_NOTNODE\fR\fR
.ad
.RS 22n
Not a node
.RE

.sp
.ne 2
.na
\fB\fBPICL_INVALIDHANDLE\fR\fR
.ad
.RS 22n
Invalid handle specified
.RE

.sp
.ne 2
.na
\fB\fBPICL_STALEHANDLE\fR\fR
.ad
.RS 22n
Stale handle specified
.RE

.sp
.ne 2
.na
\fB\fBPICL_FAILURE\fR\fR
.ad
.RS 22n
General system failure
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Evolving
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR ptree_get_propval_by_name (3PICLTREE),
.BR attributes (7)