Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : #pragma once
       3             : 
       4             : #include <unistd.h>
       5             : 
       6             : #include "journal-def.h"
       7             : 
       8             : const char* object_compressed_to_string(int compression);
       9             : int object_compressed_from_string(const char *compression);
      10             : 
      11             : int compress_blob_xz(const void *src, uint64_t src_size,
      12             :                      void *dst, size_t dst_alloc_size, size_t *dst_size);
      13             : int compress_blob_lz4(const void *src, uint64_t src_size,
      14             :                       void *dst, size_t dst_alloc_size, size_t *dst_size);
      15             : 
      16           4 : static inline int compress_blob(const void *src, uint64_t src_size,
      17             :                                 void *dst, size_t dst_alloc_size, size_t *dst_size) {
      18             :         int r;
      19             : #if HAVE_LZ4
      20           4 :         r = compress_blob_lz4(src, src_size, dst, dst_alloc_size, dst_size);
      21           4 :         if (r == 0)
      22           4 :                 return OBJECT_COMPRESSED_LZ4;
      23             : #else
      24             :         r = compress_blob_xz(src, src_size, dst, dst_alloc_size, dst_size);
      25             :         if (r == 0)
      26             :                 return OBJECT_COMPRESSED_XZ;
      27             : #endif
      28           0 :         return r;
      29             : }
      30             : 
      31             : int decompress_blob_xz(const void *src, uint64_t src_size,
      32             :                        void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
      33             : int decompress_blob_lz4(const void *src, uint64_t src_size,
      34             :                         void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
      35             : int decompress_blob(int compression,
      36             :                     const void *src, uint64_t src_size,
      37             :                     void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
      38             : 
      39             : int decompress_startswith_xz(const void *src, uint64_t src_size,
      40             :                              void **buffer, size_t *buffer_size,
      41             :                              const void *prefix, size_t prefix_len,
      42             :                              uint8_t extra);
      43             : int decompress_startswith_lz4(const void *src, uint64_t src_size,
      44             :                               void **buffer, size_t *buffer_size,
      45             :                               const void *prefix, size_t prefix_len,
      46             :                               uint8_t extra);
      47             : int decompress_startswith(int compression,
      48             :                           const void *src, uint64_t src_size,
      49             :                           void **buffer, size_t *buffer_size,
      50             :                           const void *prefix, size_t prefix_len,
      51             :                           uint8_t extra);
      52             : 
      53             : int compress_stream_xz(int fdf, int fdt, uint64_t max_bytes);
      54             : int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes);
      55             : 
      56             : int decompress_stream_xz(int fdf, int fdt, uint64_t max_size);
      57             : int decompress_stream_lz4(int fdf, int fdt, uint64_t max_size);
      58             : 
      59             : #if HAVE_LZ4
      60             : #  define compress_stream compress_stream_lz4
      61             : #  define COMPRESSED_EXT ".lz4"
      62             : #else
      63             : #  define compress_stream compress_stream_xz
      64             : #  define COMPRESSED_EXT ".xz"
      65             : #endif
      66             : 
      67             : int decompress_stream(const char *filename, int fdf, int fdt, uint64_t max_bytes);