Add e_get_next_weekday() and e_get_prev_weekday().

These just cycle over the GDateWeekday enum.

Trivial functions, but they help make loops a little easier to read.

2 files changed, 90 insertions, 0 deletions

diff --git a/e-util/e-misc-utils.c b/e-util/e-misc-utils.c
index 563a69c54c..af5d6906a1 100644
--- a/e-util/e-misc-utils.c
+++ b/e-util/e-misc-utils.c
@@ -1495,6 +1495,94 @@ e_get_weekday_name (GDateWeekday weekday,
 	return abbreviated ? abbr_names[weekday] : full_names[weekday];
 }
 
+/**
+ * e_get_next_weekday:
+ * @weekday: a #GDateWeekday
+ *
+ * Returns the #GDateWeekday after @weekday.
+ *
+ * Returns: the day after @weekday
+ **/
+GDateWeekday
+e_get_next_weekday (GDateWeekday weekday)
+{
+	GDateWeekday next;
+
+	/* Verbose for readability. */
+	switch (weekday) {
+		case G_DATE_MONDAY:
+			next = G_DATE_TUESDAY;
+			break;
+		case G_DATE_TUESDAY:
+			next = G_DATE_WEDNESDAY;
+			break;
+		case G_DATE_WEDNESDAY:
+			next = G_DATE_THURSDAY;
+			break;
+		case G_DATE_THURSDAY:
+			next = G_DATE_FRIDAY;
+			break;
+		case G_DATE_FRIDAY:
+			next = G_DATE_SATURDAY;
+			break;
+		case G_DATE_SATURDAY:
+			next = G_DATE_SUNDAY;
+			break;
+		case G_DATE_SUNDAY:
+			next = G_DATE_MONDAY;
+			break;
+		default:
+			next = G_DATE_BAD_WEEKDAY;
+			break;
+	}
+
+	return next;
+}
+
+/**
+ * e_get_prev_weekday:
+ * @weekday: a #GDateWeekday
+ *
+ * Returns the #GDateWeekday before @weekday.
+ *
+ * Returns: the day before @weekday
+ **/
+GDateWeekday
+e_get_prev_weekday (GDateWeekday weekday)
+{
+	GDateWeekday prev;
+
+	/* Verbose for readability. */
+	switch (weekday) {
+		case G_DATE_MONDAY:
+			prev = G_DATE_SUNDAY;
+			break;
+		case G_DATE_TUESDAY:
+			prev = G_DATE_MONDAY;
+			break;
+		case G_DATE_WEDNESDAY:
+			prev = G_DATE_TUESDAY;
+			break;
+		case G_DATE_THURSDAY:
+			prev = G_DATE_WEDNESDAY;
+			break;
+		case G_DATE_FRIDAY:
+			prev = G_DATE_THURSDAY;
+			break;
+		case G_DATE_SATURDAY:
+			prev = G_DATE_FRIDAY;
+			break;
+		case G_DATE_SUNDAY:
+			prev = G_DATE_SATURDAY;
+			break;
+		default:
+			prev = G_DATE_BAD_WEEKDAY;
+			break;
+	}
+
+	return prev;
+}
+
 /* Evolution Locks for crash recovery */
 static const gchar *
 get_lock_filename (void)
diff --git a/e-util/e-misc-utils.h b/e-util/e-misc-utils.h
index e41689bd43..ee7e276152 100644
--- a/e-util/e-misc-utils.h
+++ b/e-util/e-misc-utils.h
@@ -139,6 +139,8 @@ const gchar *	e_get_month_name		(GDateMonth month,
 						 gboolean abbreviated);
 const gchar *	e_get_weekday_name		(GDateWeekday weekday,
 						 gboolean abbreviated);
+GDateWeekday	e_get_next_weekday		(GDateWeekday weekday);
+GDateWeekday	e_get_prev_weekday		(GDateWeekday weekday);
 
 gboolean	e_file_lock_create		(void);
 void		e_file_lock_destroy		(void);