pkg-utils/include/comp/compressor.h

/* SPDX-License-Identifier: ISC */
#ifndef COMPRESSOR_H
#define COMPRESSOR_H

#include <stddef.h>
#include <sys/types.h>

#include "pkg/pkgformat.h"

typedef struct compressor_stream_t {
	ssize_t (*write)(struct compressor_stream_t *stream, const uint8_t *in,
			 size_t size);

	ssize_t (*read)(struct compressor_stream_t *stream, uint8_t *out,
			size_t size);

	void (*flush)(struct compressor_stream_t *stream);

	ssize_t (*do_block)(struct compressor_stream_t *stream,
			    const uint8_t *in, uint8_t *out,
			    size_t insize, size_t outsize);

	void (*destroy)(struct compressor_stream_t *stream);
} compressor_stream_t;

typedef struct compressor_t {
	struct compressor_t *next;
	const char *name;
	PKG_COMPRESSION id;

	compressor_stream_t *(*compression_stream)(struct compressor_t *cmp,
						   void *options);

	compressor_stream_t *(*uncompression_stream)(struct compressor_t *cmp);
} compressor_t;

compressor_t *compressor_by_name(const char *name);

compressor_t *compressor_by_id(PKG_COMPRESSION id);

#endif /* COMPRESSOR_H */