gras: first cut at time tag class

2 files changed, 59 insertions, 0 deletions

diff --git a/include/gras/CMakeLists.txt b/include/gras/CMakeLists.txt
index d0e3cfa..becd6cb 100644
--- a/include/gras/CMakeLists.txt
+++ b/include/gras/CMakeLists.txt
@@ -16,6 +16,7 @@ install(FILES
     sbuffer.hpp
     sbuffer.i
     tags.hpp
+    time_tag.hpp
     tags.i
     tag_iter.hpp
     tag_iter.i
diff --git a/include/gras/time_tag.hpp b/include/gras/time_tag.hpp
new file mode 100644
index 0000000..d350fa2
--- /dev/null
+++ b/include/gras/time_tag.hpp
@@ -0,0 +1,58 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#ifndef INCLUDED_GRAS_TIME_TAG_HPP
+#define INCLUDED_GRAS_TIME_TAG_HPP
+
+#include <gras/gras.hpp>
+#include <gras/chrono.hpp>
+#include <PMC/PMC.hpp>
+#include <boost/operators.hpp>
+
+namespace gras
+{
+
+struct GRAS_API TimeTag :
+    boost::less_than_comparable<TimeTag>,
+    boost::additive<TimeTag>
+{
+    //! Default contructor - hold time 0
+    TimeTag(void);
+
+    //! Create a time tag from ticks w/ default ticks per second
+    static TimeTag from_ticks(const time_ticks_t ticks);
+
+    //! Create a time tag from ticks w/ specified ticks per second
+    static TimeTag from_ticks(const time_ticks_t ticks, const double rate);
+
+    //! Create a time tag from a PMC containing a PMCTuple<2>(uint64, double)
+    static TimeTag from_pmc(const PMCC &p);
+
+    //! Convert this time tag to ticks w/ default ticks per second
+    time_ticks_t to_ticks(void);
+
+    //! Convert this time tag to ticks w/ specified ticks per second
+    time_ticks_t to_ticks(const double rate);
+
+    //! Convert this time tag to a PMC containing a PMCTuple<2>(uint64, double)
+    PMCC to_pmc(void);
+
+    //! Addition for additive interface
+    TimeTag &operator+=(const TimeTag &);
+
+    //! Subtraction for additive interface
+    TimeTag &operator-=(const TimeTag &);
+
+    //! full seconds
+    time_ticks_t _fsecs;
+
+    //! fractional ticks
+    time_ticks_t _ticks;
+};
+
+GRAS_API bool operator<(const TimeTag &lhs, const TimeTag &rhs);
+
+GRAS_API bool operator==(const TimeTag &lhs, const TimeTag &rhs);
+
+} //namespace gras
+
+#endif /*INCLUDED_GRAS_TIME_TAG_HPP*/