1 files changed, 137 insertions, 0 deletions
diff --git a/src/relabsd_device.c b/src/relabsd_device.c
new file mode 100644
index 0000000..7d2b761
--- /dev/null
+++ b/src/relabsd_device.c
@@ -0,0 +1,137 @@
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "error.h"
+#include "axis.h"
+#include "config.h"
+
+#include "relabsd_device.h"
+
+/* LIBEVDEV_UINPUT_OPEN_MANAGED is not defined on my machine. */
+#ifndef LIBEVDEV_UINPUT_OPEN_MANAGED
+   #warning "libevdev did not define LIBEVDEV_UINPUT_OPEN_MANAGED, "\
+            "using value '-2' instead."
+   #define LIBEVDEV_UINPUT_OPEN_MANAGED -2
+#endif
+
+static void replace_rel_axis
+(
+   struct relabsd_device * const dev,
+   const struct relabsd_config * const config,
+   struct input_absinfo * const absinfo,
+   unsigned int rel_code
+)
+{
+   enum relabsd_axis rad_code;
+   unsigned int abs_code;
+
+   rad_code = relabsd_axis_convert_evdev_rel(rel_code, &abs_code);
+
+   relabsd_config_get_absinfo(config, rad_code, absinfo);
+   libevdev_disable_event_code(dev->dev, EV_REL, rel_code);
+   libevdev_enable_event_code(dev->dev, EV_ABS, abs_code, absinfo);
+}
+
+int relabsd_device_create
+(
+   struct relabsd_device * const dev,
+   const struct relabsd_config * const config
+)
+{
+   struct input_absinfo absinfo;
+   int fd;
+
+   fd = open(config->input_file, O_RDONLY);
+
+   if (fd < 0)
+   {
+      _FATAL
+      (
+         "Could not open device %s in read only mode:",
+         config->input_file,
+         strerror(errno)
+      );
+
+      return -1;
+   }
+
+   if
+   (
+      libevdev_new_from_fd(fd, &(dev->dev)) < 0
+   )
+   {
+      _FATAL
+      (
+         "libevdev could not open %s:",
+         config->input_file,
+         strerror(errno)
+      );
+
+      close(fd);
+
+      return -1;
+   }
+
+   libevdev_set_name(dev->dev, config->device_name);
+
+   libevdev_enable_event_type(dev->dev, EV_ABS);
+
+   replace_rel_axis(dev, config, &absinfo, REL_X);
+   replace_rel_axis(dev, config, &absinfo, REL_Y);
+   replace_rel_axis(dev, config, &absinfo, REL_Z);
+   replace_rel_axis(dev, config, &absinfo, REL_RX);
+   replace_rel_axis(dev, config, &absinfo, REL_RY);
+   replace_rel_axis(dev, config, &absinfo, REL_RZ);
+
+   if
+   (
+       libevdev_uinput_create_from_device
+       (
+         dev->dev,
+         LIBEVDEV_UINPUT_OPEN_MANAGED,
+         &(dev->uidev)
+       )
+       < 0
+   )
+   {
+      _FATAL("Could not create relabsd device: %s.", strerror(errno));
+
+      libevdev_free(dev->dev);
+
+      close(fd);
+
+      return -1;
+   }
+
+   close(fd);
+
+   return 0;
+}
+
+void relabsd_device_destroy (const struct relabsd_device * const dev)
+{
+   libevdev_uinput_destroy(dev->uidev);
+   libevdev_free(dev->dev);
+}
+
+int relabsd_device_write_evdev_event
+(
+   const struct relabsd_device * const dev,
+   unsigned int const type,
+   unsigned int const code,
+   int const value
+)
+{
+   if
+   (
+      (libevdev_uinput_write_event(dev->uidev, type, code, value) == 0)
+      && (libevdev_uinput_write_event(dev->uidev, EV_SYN, SYN_REPORT, 0) == 0)
+   )
+   {
+      return 0;
+   }
+
+   return -1;
+}