/*
next.c - implementation of the elf_next(3) function.
Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include <private.h>

Elf_Cmd
elf_next(Elf *elf) {
    if (!elf) {
	return ELF_C_NULL;
    }
    elf_assert(elf->e_magic == ELF_MAGIC);
    if (!elf->e_parent) {
	return ELF_C_NULL;
    }
    elf_assert(elf->e_parent->e_magic == ELF_MAGIC);
    elf_assert(elf->e_parent->e_kind == ELF_K_AR);
    elf->e_parent->e_off = elf->e_next;
    if (elf->e_next == elf->e_parent->e_size) {
	return ELF_C_NULL;
    }
    return ELF_C_READ;
}