86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
#pragma once
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <unistd.h>
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#include "journal-def.h"
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const char* object_compressed_to_string(int compression);
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int object_compressed_from_string(const char *compression);
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int compress_blob_xz(const void *src, uint64_t src_size,
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void *dst, size_t dst_alloc_size, size_t *dst_size);
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int compress_blob_lz4(const void *src, uint64_t src_size,
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void *dst, size_t dst_alloc_size, size_t *dst_size);
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static inline int compress_blob(const void *src, uint64_t src_size,
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void *dst, size_t dst_alloc_size, size_t *dst_size) {
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int r;
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#if HAVE_LZ4
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r = compress_blob_lz4(src, src_size, dst, dst_alloc_size, dst_size);
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if (r == 0)
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return OBJECT_COMPRESSED_LZ4;
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#else
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r = compress_blob_xz(src, src_size, dst, dst_alloc_size, dst_size);
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if (r == 0)
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return OBJECT_COMPRESSED_XZ;
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#endif
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return r;
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}
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int decompress_blob_xz(const void *src, uint64_t src_size,
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void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
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int decompress_blob_lz4(const void *src, uint64_t src_size,
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void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
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int decompress_blob(int compression,
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const void *src, uint64_t src_size,
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void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
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int decompress_startswith_xz(const void *src, uint64_t src_size,
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void **buffer, size_t *buffer_size,
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const void *prefix, size_t prefix_len,
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uint8_t extra);
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int decompress_startswith_lz4(const void *src, uint64_t src_size,
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void **buffer, size_t *buffer_size,
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const void *prefix, size_t prefix_len,
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uint8_t extra);
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int decompress_startswith(int compression,
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const void *src, uint64_t src_size,
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void **buffer, size_t *buffer_size,
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const void *prefix, size_t prefix_len,
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uint8_t extra);
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int compress_stream_xz(int fdf, int fdt, uint64_t max_bytes);
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int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes);
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int decompress_stream_xz(int fdf, int fdt, uint64_t max_size);
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int decompress_stream_lz4(int fdf, int fdt, uint64_t max_size);
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#if HAVE_LZ4
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# define compress_stream compress_stream_lz4
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# define COMPRESSED_EXT ".lz4"
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#else
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# define compress_stream compress_stream_xz
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# define COMPRESSED_EXT ".xz"
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#endif
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int decompress_stream(const char *filename, int fdf, int fdt, uint64_t max_bytes);
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