(svn r15027) -Merge: tomatos and bananas left to be, here is NoAI for all to see.

  NoAI is an API (a framework) to build your own AIs in. See:
   http://wiki.openttd.org/wiki/index.php/AI:Main_Page
 With many thanks to:
  - glx and Rubidium for their syncing, feedback and hard work
  - Yexo for his feedback, patches, and AIs which tested the system very deep
  - Morloth for his feedback and patches
  - TJIP for hosting a challenge which kept NoAI on track
  - All AI authors for testing our AI API, and all other people who helped in one way or another
-Remove: all old AIs and their cheats/hacks

1 files changed, 64 insertions, 0 deletions

diff --git a/src/ai/api/ai_date.hpp b/src/ai/api/ai_date.hpp
new file mode 100644
index 000000000..973b1b116
--- /dev/null
+++ b/src/ai/api/ai_date.hpp
@@ -0,0 +1,64 @@
+/* $Id$ */
+
+/** @file ai_date.hpp Everything to query and manipulate date related information. */
+
+#ifndef AI_DATE_HPP
+#define AI_DATE_HPP
+
+#include "ai_object.hpp"
+
+/**
+ * Class that handles all date related (calculation) functions.
+ *
+ * @note Months and days of month are 1-based; the first month of the
+ *       year is 1 and the first day of the month is also 1.
+ * @note Years are zero based; they start with the year 0.
+ * @note Dates can be used to determine the number of days between
+ *       two different moments in time because they count the number
+ *       of days since the year 0.
+ */
+class AIDate : public AIObject {
+public:
+	static const char *GetClassName() { return "AIDate"; }
+
+	/**
+	 * Get the current date.
+	 * This is the number of days since epoch under the assumption that
+	 *  there is a leap year every 4 years, except when dividable by
+	 *  100 but not by 400.
+	 * @return The current date.
+	 */
+	static int32 GetCurrentDate();
+
+	/**
+	 * Get the year of the given date.
+	 * @param date The date to get the year of.
+	 * @return The year.
+	 */
+	static int32 GetYear(int32 date);
+
+	/**
+	 * Get the month of the given date.
+	 * @param date The date to get the month of.
+	 * @return The month.
+	 */
+	static int32 GetMonth(int32 date);
+
+	/**
+	 * Get the day (of the month) of the given date.
+	 * @param date The date to get the day of.
+	 * @return The day.
+	 */
+	static int32 GetDayOfMonth(int32 date);
+
+	/**
+	 * Get the date given a year, month and day of month.
+	 * @param year The year of the to-be determined date.
+	 * @param month The month of the to-be determined date.
+	 * @param day_of_month The day of month of the to-be determined date.
+	 * @return The date.
+	 */
+	static int32 GetDate(int32 year, int32 month, int32 day_of_month);
+};
+
+#endif /* AI_DATE_HPP */