lib: Add API to list all items in the database

2 files changed, 38 insertions, 0 deletions

diff --git a/libwacom/libwacom-database.c b/libwacom/libwacom-database.c
index b30cc10..c9f31b6 100644
--- a/libwacom/libwacom-database.c
+++ b/libwacom/libwacom-database.c
@@ -466,4 +466,29 @@ libwacom_database_destroy(WacomDeviceDatabase *db)
 	g_free (db);
 }
 
+WacomDevice**
+libwacom_list_devices_from_database(WacomDeviceDatabase *db, WacomError *error)
+{
+	GList *cur, *devices;
+	WacomDevice **list, **p;
+
+	if (!db) {
+		libwacom_error_set(error, WERROR_INVALID_DB, "db is NULL");
+		return NULL;
+	}
+
+	devices =  g_hash_table_get_values (db->device_ht);
+	list = calloc (g_list_length (devices) + 1, sizeof (WacomDevice *));
+	if (!list) {
+		libwacom_error_set(error, WERROR_BAD_ALLOC, "Memory allocation failed");
+		return NULL;
+	}
+
+	for (p = list, cur = devices; cur; cur = g_list_next (cur))
+		*p++ = (WacomDevice *) cur->data;
+	g_list_free (devices);
+
+	return list;
+}
+
 /* vim: set noexpandtab tabstop=8 shiftwidth=8: */
diff --git a/libwacom/libwacom.h b/libwacom/libwacom.h
index b1122eb..4f537c4 100644
--- a/libwacom/libwacom.h
+++ b/libwacom/libwacom.h
@@ -244,6 +244,19 @@ WacomDevice* libwacom_new_from_usbid(WacomDeviceDatabase *db, int vendor_id, int
 WacomDevice* libwacom_new_from_name(WacomDeviceDatabase *db, const char *name, WacomError *error);
 
 /**
+ * Returns the list of devices in the given database.
+ *
+ * @param db A device database
+ * @param error If not NULL, set to the error if any occurs
+ *
+ * @return A NULL terminated list of pointers to all the devices inside the
+ * database.
+ * The content of the list is owned by the database and should not be
+ * modified of freed. Use free() to free the list.
+ */
+WacomDevice** libwacom_list_devices_from_database(WacomDeviceDatabase *db, WacomError *error);
+
+/**
  * Remove the device and free all memory and references to it.
  *
  * @param device The device to delete