module_versioning.h

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/*
    This file is part of Ansel,
    Copyright (C) 2026 Aurélien PIERRE.
 
    Ansel is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    Ansel is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with Ansel.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DT_COMMON_MODULE_VERSIONING_H
#define DT_COMMON_MODULE_VERSIONING_H
 
/* Module-interface versioning: the DT_MODULE()/DT_MODULE_INTROSPECTION() macros every
 * dynamically-loaded module (iop, lib, view, imageio) must instantiate, and the version
 * they are checked against at dlopen time. Application-free on purpose: module-interface
 * headers include this instead of darktable.h. */
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define DT_MODULE_VERSION 23 // version of dt's module interface
 
 
// every module has to define this:
#ifdef _DEBUG
#define DT_MODULE(MODVER)                                                                                    \
  int dt_module_dt_version()                                                                                 \
  {                                                                                                          \
    return -DT_MODULE_VERSION;                                                                               \
  }                                                                                                          \
  int dt_module_mod_version()                                                                                \
  {                                                                                                          \
    return MODVER;                                                                                           \
  }
#else
#define DT_MODULE(MODVER)                                                                                    \
  int dt_module_dt_version()                                                                                 \
  {                                                                                                          \
    return DT_MODULE_VERSION;                                                                                \
  }                                                                                                          \
  int dt_module_mod_version()                                                                                \
  {                                                                                                          \
    return MODVER;                                                                                           \
  }
#endif
 
#define DT_MODULE_INTROSPECTION(MODVER, PARAMSTYPE) DT_MODULE(MODVER)
 
// ..to be able to compare it against this:
static inline int dt_version()
{
#ifdef _DEBUG
  return -DT_MODULE_VERSION;
#else
  return DT_MODULE_VERSION;
#endif
}
 
// returns the darktable version as <major>.<minor>
char *dt_version_major_minor();
 
#ifdef __cplusplus
}
#endif
 
#endif // DT_COMMON_MODULE_VERSIONING_H
 
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