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diff --git a/src/import/import-compress.h b/src/import/import-compress.h
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/types.h>
+
+#include <lzma.h>
+#include <zlib.h>
+#include <bzlib.h>
+
+#include "macro.h"
+
+typedef enum ImportCompressType {
+ IMPORT_COMPRESS_UNKNOWN,
+ IMPORT_COMPRESS_UNCOMPRESSED,
+ IMPORT_COMPRESS_XZ,
+ IMPORT_COMPRESS_GZIP,
+ IMPORT_COMPRESS_BZIP2,
+ _IMPORT_COMPRESS_TYPE_MAX,
+ _IMPORT_COMPRESS_TYPE_INVALID = -1,
+} ImportCompressType;
+
+typedef struct ImportCompress {
+ ImportCompressType type;
+
+ union {
+ lzma_stream xz;
+ z_stream gzip;
+ bz_stream bzip2;
+ };
+} ImportCompress;
+
+typedef int (*ImportCompressCallback)(const void *data, size_t size, void *userdata);
+
+void import_compress_free(ImportCompress *c);
+
+int import_uncompress_detect(ImportCompress *c, const void *data, size_t size);
+
+int import_uncompress(ImportCompress *c, const void *data, size_t size, ImportCompressCallback callback, void *userdata);
+
+const char* import_compress_type_to_string(ImportCompressType t) _const_;
+ImportCompressType import_compress_type_from_string(const char *s) _pure_;