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/*
* libdpkg - Debian packaging suite library routines
* compress.h - compression support functions
*
* Copyright © 2004 Scott James Remnant <scott@netsplit.com>
* Copyright © 2006-2014 Guillem Jover <guillem@debian.org>
*
* This 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
* (at your option) any later version.
*
* This 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LIBDPKG_COMPRESS_H
#define LIBDPKG_COMPRESS_H
#include <dpkg/macros.h>
#include <dpkg/error.h>
#include <stdbool.h>
DPKG_BEGIN_DECLS
/**
* @defgroup compress Compression
* @ingroup dpkg-internal
* @{
*/
enum compressor_type {
COMPRESSOR_TYPE_UNKNOWN = -1,
COMPRESSOR_TYPE_NONE,
COMPRESSOR_TYPE_GZIP,
COMPRESSOR_TYPE_XZ,
COMPRESSOR_TYPE_ZSTD,
COMPRESSOR_TYPE_BZIP2,
COMPRESSOR_TYPE_LZMA,
};
enum compressor_strategy {
COMPRESSOR_STRATEGY_UNKNOWN = -1,
COMPRESSOR_STRATEGY_NONE,
COMPRESSOR_STRATEGY_FILTERED,
COMPRESSOR_STRATEGY_HUFFMAN,
COMPRESSOR_STRATEGY_RLE,
COMPRESSOR_STRATEGY_FIXED,
COMPRESSOR_STRATEGY_EXTREME,
};
struct compress_params {
enum compressor_type type;
enum compressor_strategy strategy;
int level;
int threads_max;
};
enum compressor_type compressor_find_by_name(const char *name);
enum compressor_type compressor_find_by_extension(const char *name);
const char *compressor_get_name(enum compressor_type type);
const char *compressor_get_extension(enum compressor_type type);
enum compressor_strategy compressor_get_strategy(const char *name);
bool compressor_check_params(struct compress_params *params,
struct dpkg_error *err);
void decompress_filter(struct compress_params *params, int fd_in, int fd_out,
const char *desc, ...)
DPKG_ATTR_PRINTF(4);
void compress_filter(struct compress_params *params, int fd_in, int fd_out,
const char *desc, ...)
DPKG_ATTR_PRINTF(4);
/** @} */
DPKG_END_DECLS
#endif /* LIBDPKG_COMPRESS_H */
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