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.\" Copyright (c) 2011 Kai Wang
.\" All rights reserved.
.\"
.\" 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 AUTHOR 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 AUTHOR 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.
.\"
.\" $Id: dwarf_die_link.3 2073 2011-10-27 03:30:47Z jkoshy $
.\"
.Dd September 4, 2011
.Os
.Dt DWARF_DIE_LINK 3
.Sh NAME
.Nm dwarf_die_link
.Nd link a debugging information entry
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft Dwarf_P_Die
.Fo dwarf_die_link
.Fa "Dwarf_P_Die die"
.Fa "Dwarf_P_Die parent"
.Fa "Dwarf_P_Die child"
.Fa "Dwarf_P_Die left"
.Fa "Dwarf_P_Die right"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_die_link
links debugging information entries together.
.Pp
Argument
.Ar die
should specify the debugging information entry to be updated.
.Pp
Argument
.Ar parent
specifies the new parent link for the debugging information entry.
.Pp
Argument
.Ar child
specifies the new first child link for the debugging information entry.
.Pp
Argument
.Ar left
specifies the new left sibling link for the debugging information entry.
.Pp
Argument
.Ar right
specifies the new right sibling link for the debugging information entry.
.Pp
Only one of arguments
.Ar parent ,
.Ar child ,
.Ar left
and
.Ar right
is allowed to be non-NULL.
Existing links to parent, child, left or right debugging information
entries, if any, will be unlinked before the specified link is
established.
.Pp
If argument
.Ar err
is not NULL, it will be used to store error information in case
of an error.
.Sh RETURN VALUES
On success, function
.Fn dwarf_die_link
returns the debugging information entry provided in argument
.Ar die .
In case of an error, function
.Fn dwarf_die_link
returns
.Dv DW_DLV_BADADDR
and sets the argument
.Ar err .
.Sh ERRORS
The function
.Fn dwarf_die_link
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Argument
.Ar die
was NULL.
.It Bq Er DW_DLE_ARGUMENT
More than one of the arguments
.Ar parent ,
.Ar child ,
.Ar left
and
.Ar right
were non-NULL.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_add_die_to_debug 3 ,
.Xr dwarf_new_die 3
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