1 files changed, 87 insertions, 0 deletions
diff --git a/lib/dpkg/compress.h b/lib/dpkg/compress.h
new file mode 100644
index 0000000..7458e17
--- /dev/null
+++ b/lib/dpkg/compress.h
@@ -0,0 +1,87 @@
+/*
+ * 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 */