Changeset 80d3f846 in mainline

Timestamp:

2012-04-15T15:24:03Z (13 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f6af126

Parents:

a8a0d43

Message:

rtc: check for leap years

File:

• uspace/drv/time/cmos-rtc/cmos-rtc.c (modified) (3 diffs)

uspace/drv/time/cmos-rtc/cmos-rtc.c

@@ -92 +92 @@
 static int rtc_tm_sanity_check(struct tm *t);
 static void rtc_register_write(rtc_t *rtc, int reg, int data);
-
+static bool is_leap_year(int year);
+
+static int days_month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 
 static ddf_dev_ops_t rtc_dev_ops;
@@ -429 +431 @@
 rtc_tm_sanity_check(struct tm *t)
 {
+        int ndays;
+
         if (t->tm_sec < 0 || t->tm_sec > 59)
                 return EINVAL;
@@ -442 +446 @@
                 return EINVAL;
 
-        /* XXX Some months have less than 31 days... */
+        if (t->tm_mon == 1/* FEB */ && is_leap_year(t->tm_year))
+                ndays = 29;
+        else
+                ndays = days_month[t->tm_mon];
+
+        if (t->tm_mday > ndays)
+                return EINVAL;
+
         return EOK;
+}
+
+/** Check if a year is a leap year
+ *
+ * @param year   The year to check
+ *
+ * @return       true if it is a leap year, false otherwise
+ */
+static bool
+is_leap_year(int year)
+{
+        bool r = false;
+
+        if (year % 4 == 0) {
+                if (year % 100 == 0)
+                        r = year % 400 == 0;
+                else
+                        r = true;
+        }
+
+        return r;
 }