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1 files changed, 50 insertions, 0 deletions

diff --git a/src/config/parameters/compatibility.c b/src/config/parameters/compatibility.c
new file mode 100644
index 0000000..cc65c7f
--- /dev/null
+++ b/src/config/parameters/compatibility.c
@@ -0,0 +1,50 @@
+/**** LIBEVDEV ****************************************************************/
+#include <libevdev/libevdev.h>
+
+/**** RELABSD *****************************************************************/
+#include <relabsd/debug.h>
+
+#include <relabsd/config/parameters.h>
+
+#include <relabsd/device/axis.h>
+
+/******************************************************************************/
+/**** LOCAL FUNCTIONS *********************************************************/
+/******************************************************************************/
+
+/******************************************************************************/
+/**** EXPORTED FUNCTIONS ******************************************************/
+/******************************************************************************/
+int relabsd_parameters_are_compatible_with
+(
+   const struct libevdev * const restrict libevdev,
+   const struct relabsd_parameters parameters [const restrict static 1]
+)
+{
+   int i, device_is_valid;
+   unsigned int rel_code;
+
+   device_is_valid = 1;
+
+   for (i = 0; i < RELABSD_AXIS_VALID_AXES_COUNT; ++i)
+   {
+      if (relabsd_axis_is_enabled(parameters->axes + i))
+      {
+         rel_code = relabsd_axis_name_to_evdev_rel((enum relabsd_axis_name) i);
+
+         if (!libevdev_has_event_code(libevdev, EV_REL, rel_code))
+         {
+            RELABSD_ERROR
+            (
+               "Input device has no relative %s axis, yet the configuration "
+               "file asks to convert it.",
+               relabsd_axis_name_to_string((enum relabsd_axis_name) i)
+            );
+
+            device_is_valid = 0;
+         }
+      }
+   }
+
+   return device_is_valid;
+}