.\" Copyright (c) 2011 Kai Wang
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.\" $Id: dwarf_get_fde_n.3 3640 2018-10-14 14:09:13Z jkoshy $
.\"
.Dd May 14, 2011
.Dt DWARF_GET_FDE_N 3
.Os
.Sh NAME
.Nm dwarf_get_fde_n
.Nd retrieve FDE descriptor
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_get_fde_n
.Fa "Dwarf_Fde *fdelist"
.Fa "Dwarf_Unsigned fde_index"
.Fa "Dwarf_Fde *ret_fde"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_get_fde_n
retrieves an FDE descriptor from an array of FDE descriptors.
.Pp
Argument
.Ar fdelist
should point to an array of FDE descriptors, as returned by the functions
.Xr dwarf_get_fde_list 3
or
.Xr dwarf_get_fde_list_eh 3 .
.Pp
Argument
.Ar fde_index
specifies the 0-based index of the desired FDE descriptor.
.Pp
Argument
.Ar ret_fde
should point to a location that will hold the returned FDE descriptor.
.Pp
If argument
.Ar err
is not NULL, it will be used to store error information in case of an
error.
.Sh RETURN VALUES
Function
.Fn dwarf_get_fde_n
returns
.Dv DW_DLV_OK
when it succeeds.
It returns
.Dv DW_DLV_NO_ENTRY
if the FDE descriptor index specified by argument
.Ar fde_index
is out of range.
In case of an error, it returns
.Dv DW_DLV_ERROR
and sets the argument
.Ar err .
.Sh ERRORS
Function
.Fn dwarf_get_fde_n
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_NO_ENTRY"
.It Bq Er DW_DLE_ARGUMENT
Either of the arguments
.Ar fdelist
or
.Ar ret_fde
was NULL.
.It Bq Er DW_DLE_NO_ENTRY
The FDE descriptor index specified by argument
.Ar fde_index
was out of range.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_get_cie_of_fde 3 ,
.Xr dwarf_get_fde_at_pc 3 ,
.Xr dwarf_get_fde_info_for_all_regs 3 ,
.Xr dwarf_get_fde_info_for_all_regs3 3 ,
.Xr dwarf_get_fde_info_for_cfa_reg3 3 ,
.Xr dwarf_get_fde_info_for_reg 3 ,
.Xr dwarf_get_fde_info_for_reg3 3 ,
.Xr dwarf_get_fde_instr_bytes 3 ,
.Xr dwarf_get_fde_list 3 ,
.Xr dwarf_get_fde_list_eh 3 ,
.Xr dwarf_get_fde_range 3