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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
c2f1db8f | 3 | #pragma once |
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4 | |
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2011 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
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11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
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13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
e4e61fdb | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
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21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
355b59e2 | 24 | #include <unistd.h> |
e4e61fdb | 25 | |
d89c8fdf | 26 | #include "journal-def.h" |
e4e61fdb | 27 | |
d89c8fdf ZJS |
28 | const char* object_compressed_to_string(int compression); |
29 | int object_compressed_from_string(const char *compression); | |
e4e61fdb | 30 | |
fa1c4b51 ZJS |
31 | int compress_blob_xz(const void *src, uint64_t src_size, void *dst, size_t *dst_size); |
32 | int compress_blob_lz4(const void *src, uint64_t src_size, void *dst, size_t *dst_size); | |
355b59e2 | 33 | |
fa1c4b51 | 34 | static inline int compress_blob(const void *src, uint64_t src_size, void *dst, size_t *dst_size) { |
d89c8fdf ZJS |
35 | int r; |
36 | #ifdef HAVE_LZ4 | |
37 | r = compress_blob_lz4(src, src_size, dst, dst_size); | |
38 | if (r == 0) | |
39 | return OBJECT_COMPRESSED_LZ4; | |
40 | #else | |
41 | r = compress_blob_xz(src, src_size, dst, dst_size); | |
42 | if (r == 0) | |
43 | return OBJECT_COMPRESSED_XZ; | |
44 | #endif | |
45 | return r; | |
46 | } | |
47 | ||
48 | int decompress_blob_xz(const void *src, uint64_t src_size, | |
fa1c4b51 | 49 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max); |
d89c8fdf | 50 | int decompress_blob_lz4(const void *src, uint64_t src_size, |
fa1c4b51 | 51 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max); |
d89c8fdf ZJS |
52 | int decompress_blob(int compression, |
53 | const void *src, uint64_t src_size, | |
fa1c4b51 | 54 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max); |
d89c8fdf ZJS |
55 | |
56 | int decompress_startswith_xz(const void *src, uint64_t src_size, | |
fa1c4b51 ZJS |
57 | void **buffer, size_t *buffer_size, |
58 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
59 | uint8_t extra); |
60 | int decompress_startswith_lz4(const void *src, uint64_t src_size, | |
fa1c4b51 ZJS |
61 | void **buffer, size_t *buffer_size, |
62 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
63 | uint8_t extra); |
64 | int decompress_startswith(int compression, | |
65 | const void *src, uint64_t src_size, | |
fa1c4b51 ZJS |
66 | void **buffer, size_t *buffer_size, |
67 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
68 | uint8_t extra); |
69 | ||
70 | int compress_stream_xz(int fdf, int fdt, off_t max_bytes); | |
71 | int compress_stream_lz4(int fdf, int fdt, off_t max_bytes); | |
72 | ||
73 | int decompress_stream_xz(int fdf, int fdt, off_t max_size); | |
74 | int decompress_stream_lz4(int fdf, int fdt, off_t max_size); | |
75 | ||
76 | #ifdef HAVE_LZ4 | |
77 | # define compress_stream compress_stream_lz4 | |
78 | # define COMPRESSED_EXT ".lz4" | |
79 | #else | |
80 | # define compress_stream compress_stream_xz | |
81 | # define COMPRESSED_EXT ".xz" | |
82 | #endif | |
83 | ||
84 | int decompress_stream(const char *filename, int fdf, int fdt, off_t max_bytes); |