.\" Copyright (c) 2014 Kai Wang
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.\" $Id: dwarf_attroffset.3 3640 2018-10-14 14:09:13Z jkoshy $
.\"
.Dd December 20, 2014
.Dt DWARF_ATTROFFSET 3
.Os
.Sh NAME
.Nm dwarf_attroffset
.Nd retrieve the section-relative offset of an attribute descriptor
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_attroffset
.Fa "Dwarf_Attribute at"
.Fa "Dwarf_Off *ret_off"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_attroffset
retrieves the section-relative offset of the attribute descriptor
referenced by argument
.Ar at .
.Pp
Argument
.Ar ret_off
should point to a location that is to hold the returned
section-relative offset.
If argument
.Ar err
is non-NULL, it is used to return an error descriptor in case of an
error.
.Sh RETURN VALUES
On success, function
.Fn dwarf_attroffset
returns
.Dv DW_DLV_OK .
.Pp
In case of an error, it returns
.Dv DW_DLV_ERROR
and sets argument
.Ar err .
.Sh COMPATIBILITY
This function is an extension to the
.Xr DWARF 3
API.
.Sh ERRORS
The
.Fn dwarf_attroffset
function may fail with the following errors:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Either of the arguments
.Ar at
or
.Ar ret_off
was NULL.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_attr 3