/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-#ifndef foocompresshfoo
-#define foocompresshfoo
+#pragma once
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ 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 <inttypes.h>
-#include <stdbool.h>
+#include <unistd.h>
-bool compress_blob(const void *src, uint64_t src_size, void *dst, uint64_t *dst_size);
+#include "journal-def.h"
-bool uncompress_blob(const void *src, uint64_t src_size,
- void **dst, uint64_t *dst_alloc_size, uint64_t* dst_size);
+const char* object_compressed_to_string(int compression);
+int object_compressed_from_string(const char *compression);
-bool uncompress_startswith(const void *src, uint64_t src_size,
- void **buffer, uint64_t *buffer_size,
- const void *prefix, uint64_t prefix_len,
- uint8_t extra);
+int compress_blob_xz(const void *src, uint64_t src_size, void *dst, size_t *dst_size);
+int compress_blob_lz4(const void *src, uint64_t src_size, void *dst, size_t *dst_size);
+static inline int compress_blob(const void *src, uint64_t src_size, void *dst, size_t *dst_size) {
+ int r;
+#ifdef HAVE_LZ4
+ r = compress_blob_lz4(src, src_size, dst, dst_size);
+ if (r == 0)
+ return OBJECT_COMPRESSED_LZ4;
+#else
+ r = compress_blob_xz(src, src_size, dst, dst_size);
+ if (r == 0)
+ return OBJECT_COMPRESSED_XZ;
#endif
+ return r;
+}
+
+int decompress_blob_xz(const void *src, uint64_t src_size,
+ void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
+int decompress_blob_lz4(const void *src, uint64_t src_size,
+ void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
+int decompress_blob(int compression,
+ const void *src, uint64_t src_size,
+ void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
+
+int decompress_startswith_xz(const void *src, uint64_t src_size,
+ void **buffer, size_t *buffer_size,
+ const void *prefix, size_t prefix_len,
+ uint8_t extra);
+int decompress_startswith_lz4(const void *src, uint64_t src_size,
+ void **buffer, size_t *buffer_size,
+ const void *prefix, size_t prefix_len,
+ uint8_t extra);
+int decompress_startswith(int compression,
+ const void *src, uint64_t src_size,
+ void **buffer, size_t *buffer_size,
+ const void *prefix, size_t prefix_len,
+ uint8_t extra);
+
+int compress_stream_xz(int fdf, int fdt, off_t max_bytes);
+int compress_stream_lz4(int fdf, int fdt, off_t max_bytes);
+
+int decompress_stream_xz(int fdf, int fdt, off_t max_size);
+int decompress_stream_lz4(int fdf, int fdt, off_t max_size);
+
+#ifdef HAVE_LZ4
+# define compress_stream compress_stream_lz4
+# define COMPRESSED_EXT ".lz4"
+#else
+# define compress_stream compress_stream_xz
+# define COMPRESSED_EXT ".xz"
+#endif
+
+int decompress_stream(const char *filename, int fdf, int fdt, off_t max_bytes);