From 66dc016ce6658d51443b094fbff60bbf3370dddb Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sat, 26 Sep 2015 14:22:37 -0400
Subject: [PATCH] ISO8601d: Added ::weekOfYear

---
 src/ISO8601.cpp | 21 +++++++++++++++++++++
 src/ISO8601.h   |  1 +
 2 files changed, 22 insertions(+)

diff --git a/src/ISO8601.cpp b/src/ISO8601.cpp
index b1ca9eedf..d9ef406f3 100644
--- a/src/ISO8601.cpp
+++ b/src/ISO8601.cpp
@@ -933,6 +933,27 @@ int ISO8601d::year () const
   return t->tm_year + 1900;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+int ISO8601d::weekOfYear (int weekStart) const
+{
+  struct tm* t = localtime (&_date);
+  char   weekStr[3];
+
+  if (weekStart == 0)
+    strftime(weekStr, sizeof(weekStr), "%U", t);
+  else if (weekStart == 1)
+    strftime(weekStr, sizeof(weekStr), "%V", t);
+  else
+    throw std::string (STRING_DATE_BAD_WEEKSTART);
+
+  int weekNumber = atoi (weekStr);
+
+  if (weekStart == 0)
+    weekNumber += 1;
+
+  return weekNumber;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void ISO8601p::clear ()
 {
diff --git a/src/ISO8601.h b/src/ISO8601.h
index 3563bd5b8..db35dff1d 100644
--- a/src/ISO8601.h
+++ b/src/ISO8601.h
@@ -57,6 +57,7 @@ public:
   int week () const;
   int day () const;
   int year () const;
+  int weekOfYear (int) const;
 
 private:
   void clear ();