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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_get_cu_die_offset.3 2071 2011-10-27 03:20:00Z jkoshy $
.\"
.Dd April 10, 2011
.Os
.Dt DWARF_GET_CU_DIE_OFFSET 3
.Sh NAME
.Nm dwarf_get_arange_cu_header_offset ,
.Nm dwarf_get_cu_die_offset
.Nd retrieve compilation unit offsets
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_get_arange_cu_header_offset
.Fa "Dwarf_Arange ar"
.Fa "Dwarf_Off *ret"
.Fa "Dwarf_Error *err"
.Fc
.Ft int
.Fo dwarf_get_cu_die_offset
.Fa "Dwarf_Arange ar"
.Fa "Dwarf_Off *ret"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
These functions retrieve the offsets, relative to the
.Dq ".debug_info"
DWARF section, of the debugging information entries describing the
compilation unit associated with a
.Vt Dwarf_Arange
descriptor.
.Pp
Function
.Fn dwarf_get_arange_cu_header_offset
retrieves the offset of the compilation unit header associated with
argument
.Ar ar ,
and stores it in the location pointed to by argument
.Ar ret .
.Pp
Function
.Fn dwarf_get_cu_die_offset
retrieves the offset of the debugging information entry for the
compilation unit associated with argument
.Ar ar ,
and stores it in the location pointed to by argument
.Ar ret .
.Pp
If argument
.Ar err
is not NULL, these functions will use it to store error information,
in case of an error.
.Sh RETURN VALUES
On success, these functions returns
.Dv DW_DLV_OK .
In case of an error, they return
.Dv DW_DLV_ERROR
and set the argument
.Ar err .
.Sh ERRORS
These functions may fail with:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Argument
.Ar ar
was not a valid
.Vt Dwarf_Arange
descriptor.
.It Bq Er DW_DLE_ARGUMENT
Argument
.Ar ret
was NULL.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_get_arange 3 ,
.Xr dwarf_get_arange_info 3 ,
.Xr dwarf_get_aranges 3
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