src/import/import-compress.h

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