Import of the watch repository from Pebble

src/fw/util/date.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "date.h"
+
+bool date_util_is_leap_year(int year) {
+  return (year % 4 == 0) && (year % 100 != 0 || year % 400 == 0);
+}
+
+int date_util_get_max_days_in_month(int month, bool is_leap_year) {
+  int days;
+
+  switch (month) {
+    case 4: //April
+    case 6: //June
+    case 9: //September
+    case 11: //November
+    {
+      days = 30;
+      break;
+    }
+    case 2: // February
+    {
+      days = is_leap_year ? 29 : 28;
+      break;
+    }
+    default:
+    {
+      // Jan, March, May, July, August, October, December
+      days = 31;
+      break;
+    }
+  }
+  return days;
+}