~mdw / dpkg / blame
| Commit | Line | Data |
|---|---|---|
| 1479465f GJ |
1 | /* |
| 2 | * libdpkg - Debian packaging suite library routines | |
| 3 | * compress.h - compression support functions | |
| 4 | * | |
| 5 | * Copyright © 2004 Scott James Remnant <scott@netsplit.com> | |
| 6 | * Copyright © 2006-2014 Guillem Jover <guillem@debian.org> | |
| 7 | * | |
| 8 | * This is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License as published by | |
| 10 | * the Free Software Foundation; either version 2 of the License, or | |
| 11 | * (at your option) any later version. | |
| 12 | * | |
| 13 | * This is distributed in the hope that it will be useful, | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | * GNU General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU General Public License | |
| 19 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef LIBDPKG_COMPRESS_H | |
| 23 | #define LIBDPKG_COMPRESS_H | |
| 24 | ||
| 25 | #include <dpkg/macros.h> | |
| 26 | #include <dpkg/error.h> | |
| 27 | ||
| 28 | #include <stdbool.h> | |
| 29 | ||
| 30 | DPKG_BEGIN_DECLS | |
| 31 | ||
| 32 | /** | |
| 33 | * @defgroup compress Compression | |
| 34 | * @ingroup dpkg-internal | |
| 35 | * @{ | |
| 36 | */ | |
| 37 | ||
| 38 | enum compressor_type { | |
| 39 | COMPRESSOR_TYPE_UNKNOWN = -1, | |
| 40 | COMPRESSOR_TYPE_NONE, | |
| 41 | COMPRESSOR_TYPE_GZIP, | |
| 42 | COMPRESSOR_TYPE_XZ, | |
| 43 | COMPRESSOR_TYPE_BZIP2, | |
| 44 | COMPRESSOR_TYPE_LZMA, | |
| 45 | }; | |
| 46 | ||
| 47 | enum compressor_strategy { | |
| 48 | COMPRESSOR_STRATEGY_UNKNOWN = -1, | |
| 49 | COMPRESSOR_STRATEGY_NONE, | |
| 50 | COMPRESSOR_STRATEGY_FILTERED, | |
| 51 | COMPRESSOR_STRATEGY_HUFFMAN, | |
| 52 | COMPRESSOR_STRATEGY_RLE, | |
| 53 | COMPRESSOR_STRATEGY_FIXED, | |
| 54 | COMPRESSOR_STRATEGY_EXTREME, | |
| 55 | }; | |
| 56 | ||
| 57 | struct compress_params { | |
| 58 | enum compressor_type type; | |
| 59 | enum compressor_strategy strategy; | |
| 60 | int level; | |
| 61 | }; | |
| 62 | ||
| 63 | enum compressor_type compressor_find_by_name(const char *name); | |
| 64 | enum compressor_type compressor_find_by_extension(const char *name); | |
| 65 | ||
| 66 | const char *compressor_get_name(enum compressor_type type); | |
| 67 | const char *compressor_get_extension(enum compressor_type type); | |
| 68 | ||
| 69 | enum compressor_strategy compressor_get_strategy(const char *name); | |
| 70 | ||
| 71 | bool compressor_check_params(struct compress_params *params, | |
| 72 | struct dpkg_error *err); | |
| 73 | ||
| 74 | void decompress_filter(enum compressor_type type, int fd_in, int fd_out, | |
| 75 | const char *desc, ...) | |
| 76 | DPKG_ATTR_PRINTF(4); | |
| 77 | void compress_filter(struct compress_params *params, int fd_in, int fd_out, | |
| 78 | const char *desc, ...) | |
| 79 | DPKG_ATTR_PRINTF(4); | |
| 80 | ||
| 81 | /** @} */ | |
| 82 | ||
| 83 | DPKG_END_DECLS | |
| 84 | ||
| 85 | #endif /* LIBDPKG_COMPRESS_H */ |