.\" #
.\" # Copyright (c) 2014, Juniper Networks, Inc.
.\" # All rights reserved.
.\" # This SOFTWARE is licensed under the LICENSE provided in the
.\" # ../Copyright file. By downloading, installing, copying, or 
.\" # using the SOFTWARE, you agree to be bound by the terms of that
.\" # LICENSE.
.\" # Phil Shafer, July 2014
.\" 
.Dd December 4, 2014
.Dt LIBXO 3
.Os
.Sh NAME
.Nm xo_set_writer
.Nd set custom writer functions for a libxo handle
.Sh LIBRARY
.Lb libxo
.Sh SYNOPSIS
.In libxo/xo.h
.Ft void
.Sy typedef xo_ssize_t (*xo_write_func_t)(void *, const char *);
.Pp
.Sy typedef void (*xo_close_func_t)(void *);
.Pp
.Sy typedef int (*xo_flush_func_t)(void *);
.Fn xo_set_writer "xo_handle_t *handle" "void *opaque"
                        "xo_write_func_t write_func"
                        "xo_close_func_t close_func"
                        "xo_flush_func_t flush_func"
.Sh DESCRIPTION
The
.Fn xo_set_writer
function allows custom
.Dq write
functions
which can tailor how
.Nm libxo
writes data.
An
.Fa opaque
argument is
recorded and passed back to the
.Fa write_func
function, allowing the function
to acquire context information.
The
.Fa close_func
function can
release this opaque data and any other resources as needed.
The
.Fa flush_func
function should
flush any pending data associated with the opaque pointer.
.Sh SEE ALSO
.Xr xo_emit 3 ,
.Xr libxo 3
.Sh HISTORY
The
.Nm libxo
library first appeared in
.Fx 11.0 .
.Sh AUTHORS
.Nm libxo
was written by
.An Phil Shafer Aq Mt phil@freebsd.org .