Usermode/libc - C++ wrapping in headers, time rework

[tpg/acess2.git] / Usermode / Libraries / libc.so_src / timeconv.h

diff --git a/Usermode/Libraries/libc.so_src/timeconv.h b/Usermode/Libraries/libc.so_src/timeconv.h
new file mode 100644 (file)
index 0000000..1adba8f
--- /dev/null
+++ b/Usermode/Libraries/libc.so_src/timeconv.h
@@ -0,0 +1,39 @@
+/*
+ * Acess2 C Library
+ * - By John Hodge (thePowersGang)
+ *
+ * timeconv.h
+ * - Shared User/Kernel time conversion code
+ */
+#ifndef _LIBC_TIMECONV_H_
+#define _LIBC_TIMECONV_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+
+extern int64_t seconds_since_y2k(int years_since, int mon, int day, int h, int m, int s);
+
+/**
+ * \return Number of days since Y2K
+ * 
+ * Extracts the time of day from the timestamp, (possibly taking into account leap seconds)
+ */
+extern int64_t get_days_since_y2k(int64_t ts, int *h, int *m, int *s);
+
+/**
+ * \param days Number of days since Y2K
+ * \return Number of years since Y2K
+ * 
+ * Converts a count of days since Y2K, and returns the number of years. Extracting the day of
+ * year, and if that year is a leap year.
+ */
+extern int64_t get_years_since_y2k(int64_t days, bool *is_leap, int *doy);
+
+
+/**
+ * Gets the month and day of month from a day of year and leap year status
+ */
+extern void    get_month_day(int doy, bool is_ly, int *mon, int *day);
+
+#endif
+