X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fcalendar.c;h=c3d9d8e6ea00728cca253c4be18dbc01527dc5f6;hb=a1fa03b1638263a959df0b2943478a0a4ca4b11a;hp=3a38f1265fae0b3013d68840a8ea62aaae609b4d;hpb=8acca2de53c1852f38726f70fc6516b34732a79f;p=pspp

diff --git a/src/data/calendar.c b/src/data/calendar.c
index 3a38f1265f..c3d9d8e6ea 100644
--- a/src/data/calendar.c
+++ b/src/data/calendar.c
@@ -210,3 +210,14 @@ calendar_offset_to_mday (int ofs)
   calendar_offset_to_gregorian (ofs, &y, &m, &d, &yd);
   return d;
 }
+
+/* Returns the number of days in the specified month. */
+int
+calendar_days_in_month (int y, int m) 
+{
+  static const int days_per_month[12]
+    = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+  assert (m >= 1 && m <= 12);
+  return m == 2 && is_leap_year (y) ? 29 : days_per_month[m - 1];
+}