bring in beats face using new time zone function

watch-faces/clock/beats_face.h

@@ -0,0 +1,60 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Wesley Ellis <https://github.com/tahnok>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef BEATS_FACE_H_
+#define BEATS_FACE_H_
+
+/*
+ * BEATS TIME face
+ *
+ * The Beat Time face displays the current Swatch Internet Time, or .beat time.
+ * This is a decimal time system that divides the day into 1000 beats.
+ *
+ * The three large digits in the bottom row indicate the current beat, and the
+ * two smaller digits (normally the seconds in Simple Clock) indicate the
+ * fractional beat; so for example you can read “67214” as “beat 672.14”.
+ */
+
+#include "movement.h"
+
+typedef struct {
+    int8_t next_subsecond_update;
+    uint32_t last_centibeat_displayed;
+} beats_face_state_t;
+
+uint32_t clock2beats(uint32_t hours, uint32_t minutes, uint32_t seconds, uint32_t subseconds, int16_t utc_offset);
+void beats_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void beats_face_activate(movement_settings_t *settings, void *context);
+bool beats_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void beats_face_resign(movement_settings_t *settings, void *context);
+
+#define beats_face ((const watch_face_t){ \
+    beats_face_setup, \
+    beats_face_activate, \
+    beats_face_loop, \
+    beats_face_resign, \
+    NULL, \
+})
+
+#endif // BEATS_FACE_H_