src/systemd/sd-hwdb.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #ifndef foosdhwdbhfoo
   3 #define foosdhwdbhfoo
   4
   5 /***
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "_sd-common.h"
  21
  22 _SD_BEGIN_DECLARATIONS;
  23
  24 typedef struct sd_hwdb sd_hwdb;
  25
  26 sd_hwdb *sd_hwdb_ref(sd_hwdb *hwdb);
  27 sd_hwdb *sd_hwdb_unref(sd_hwdb *hwdb);
  28
  29 int sd_hwdb_new(sd_hwdb **ret);
  30
  31 int sd_hwdb_get(sd_hwdb *hwdb, const char *modalias, const char *key, const char **value);
  32
  33 int sd_hwdb_seek(sd_hwdb *hwdb, const char *modalias);
  34 int sd_hwdb_enumerate(sd_hwdb *hwdb, const char **key, const char **value);
  35
  36 /* the inverse condition avoids ambiguity of dangling 'else' after the macro */
  37 #define SD_HWDB_FOREACH_PROPERTY(hwdb, modalias, key, value)            \
  38         if (sd_hwdb_seek(hwdb, modalias) < 0) { }                       \
  39         else while (sd_hwdb_enumerate(hwdb, &(key), &(value)) > 0)
  40
  41 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_hwdb, sd_hwdb_unref);
  42
  43 _SD_END_DECLARATIONS;
  44
  45 #endif