src/import/import-compress.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #if HAVE_BZIP2
   5 #include <bzlib.h>
   6 #endif
   7 #include <lzma.h>
   8 #include <sys/types.h>
   9 #include <zlib.h>
  10
  11 #include "macro.h"
  12
  13 typedef enum ImportCompressType {
  14         IMPORT_COMPRESS_UNKNOWN,
  15         IMPORT_COMPRESS_UNCOMPRESSED,
  16         IMPORT_COMPRESS_XZ,
  17         IMPORT_COMPRESS_GZIP,
  18         IMPORT_COMPRESS_BZIP2,
  19         _IMPORT_COMPRESS_TYPE_MAX,
  20         _IMPORT_COMPRESS_TYPE_INVALID = -EINVAL,
  21 } ImportCompressType;
  22
  23 typedef struct ImportCompress {
  24         ImportCompressType type;
  25         bool encoding;
  26         union {
  27                 lzma_stream xz;
  28                 z_stream gzip;
  29 #if HAVE_BZIP2
  30                 bz_stream bzip2;
  31 #endif
  32         };
  33 } ImportCompress;
  34
  35 typedef int (*ImportCompressCallback)(const void *data, size_t size, void *userdata);
  36
  37 void import_compress_free(ImportCompress *c);
  38
  39 int import_uncompress_detect(ImportCompress *c, const void *data, size_t size);
  40 void import_uncompress_force_off(ImportCompress *c);
  41 int import_uncompress(ImportCompress *c, const void *data, size_t size, ImportCompressCallback callback, void *userdata);
  42
  43 int import_compress_init(ImportCompress *c, ImportCompressType t);
  44 int import_compress(ImportCompress *c, const void *data, size_t size, void **buffer, size_t *buffer_size, size_t *buffer_allocated);
  45 int import_compress_finish(ImportCompress *c, void **buffer, size_t *buffer_size, size_t *buffer_allocated);
  46
  47 const char* import_compress_type_to_string(ImportCompressType t) _const_;
  48 ImportCompressType import_compress_type_from_string(const char *s) _pure_;