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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
***/
#include <unistd.h>
#include "journal-def.h"
const char* object_compressed_to_string(int compression);
int object_compressed_from_string(const char *compression);
int compress_blob_xz(const void *src, uint64_t src_size,
void *dst, size_t dst_alloc_size, size_t *dst_size);
int compress_blob_lz4(const void *src, uint64_t src_size,
void *dst, size_t dst_alloc_size, size_t *dst_size);
static inline int compress_blob(const void *src, uint64_t src_size,
void *dst, size_t dst_alloc_size, size_t *dst_size) {
int r;
#if HAVE_LZ4
r = compress_blob_lz4(src, src_size, dst, dst_alloc_size, dst_size);
if (r == 0)
return OBJECT_COMPRESSED_LZ4;
#else
r = compress_blob_xz(src, src_size, dst, dst_alloc_size, dst_size);
if (r == 0)
return OBJECT_COMPRESSED_XZ;
#endif
return r;
}
int decompress_blob_xz(const void *src, uint64_t src_size,
void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
int decompress_blob_lz4(const void *src, uint64_t src_size,
void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
int decompress_blob(int compression,
const void *src, uint64_t src_size,
void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
int decompress_startswith_xz(const void *src, uint64_t src_size,
void **buffer, size_t *buffer_size,
const void *prefix, size_t prefix_len,
uint8_t extra);
int decompress_startswith_lz4(const void *src, uint64_t src_size,
void **buffer, size_t *buffer_size,
const void *prefix, size_t prefix_len,
uint8_t extra);
int decompress_startswith(int compression,
const void *src, uint64_t src_size,
void **buffer, size_t *buffer_size,
const void *prefix, size_t prefix_len,
uint8_t extra);
int compress_stream_xz(int fdf, int fdt, uint64_t max_bytes);
int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes);
int decompress_stream_xz(int fdf, int fdt, uint64_t max_size);
int decompress_stream_lz4(int fdf, int fdt, uint64_t max_size);
#if HAVE_LZ4
# define compress_stream compress_stream_lz4
# define COMPRESSED_EXT ".lz4"
#else
# define compress_stream compress_stream_xz
# define COMPRESSED_EXT ".xz"
#endif
int decompress_stream(const char *filename, int fdf, int fdt, uint64_t max_bytes);
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