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/* Advance in archive to next element.
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Copyright (C) 1998-2009, 2015 Red Hat, Inc.
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This file is part of elfutils.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <libelf.h>
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#include <stddef.h>
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#include "libelfP.h"
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Elf_Cmd
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elf_next (Elf *elf)
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{
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Elf *parent;
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Elf_Cmd ret;
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/* Be gratious, the specs demand it. */
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if (elf == NULL || elf->parent == NULL)
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return ELF_C_NULL;
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/* We can be sure the parent is an archive. */
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parent = elf->parent;
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assert (parent->kind == ELF_K_AR);
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rwlock_wrlock (parent->lock);
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/* Now advance the offset. */
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parent->state.ar.offset += (sizeof (struct ar_hdr)
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+ ((parent->state.ar.elf_ar_hdr.ar_size + 1)
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& ~1l));
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/* Get the next archive header. */
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ret = __libelf_next_arhdr_wrlock (parent) != 0 ? ELF_C_NULL : elf->cmd;
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/* If necessary, mark the archive header as unusable. */
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if (ret == ELF_C_NULL)
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parent->state.ar.elf_ar_hdr.ar_name = NULL;
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rwlock_unlock (parent->lock);
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return ret;
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}
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