From c84a2ea0756c4a749cff5aff7aa029e880d1a5c6 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Fri, 18 Oct 2019 20:13:17 -0400
Subject: clock_clear(): New function

---
diff --git a/src/clock.c b/src/clock.c
index f6ffdcf..a914aa3 100644
--- a/src/clock.c
+++ b/src/clock.c
@@ -51,8 +51,10 @@ static const uint16_t _clock_font[] = {
 	075757,  /* 8 */
 	075717,  /* 9 */
 	004040,  /* : */
+	000000,  /* Blank */
 };
 #define COLON_DIGIT 10
+#define BLANK_DIGIT 11
 
 struct clock {
 	WINDOW *win;
@@ -184,6 +186,22 @@ clock_draw(struct clock *clock)
 	_clock_draw_digit(clock, x += SPACING + DIGIT_WIDTH, tm->tm_sec % 10);
 }
 
+void
+clock_clear(struct clock *clock)
+{
+	int x;
+
+	x = 0;
+	_clock_draw_digit(clock, x += SPACING              , BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + DIGIT_WIDTH, BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + DIGIT_WIDTH, BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + COLON_WIDTH, BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + DIGIT_WIDTH, BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + DIGIT_WIDTH, BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + COLON_WIDTH, BLANK_DIGIT);
+	_clock_draw_digit(clock, x += SPACING + DIGIT_WIDTH, BLANK_DIGIT);
+}
+
 struct clock *
 clock_destroy(struct clock **clock_p)
 {
diff --git a/src/clock.h b/src/clock.h
index 9851ddd..8bd0a24 100644
--- a/src/clock.h
+++ b/src/clock.h
@@ -38,6 +38,9 @@ clock_size(struct clock *clock);
 void
 clock_draw(struct clock *clock);
 
+void
+clock_clear(struct clock *clock);
+
 struct clock *
 clock_destroy(struct clock **clock_p);
 
--
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