gras: adding pythonic interface to time tag

3 files changed, 48 insertions, 1 deletions

diff --git a/include/gras/CMakeLists.txt b/include/gras/CMakeLists.txt
index becd6cb..176d5e5 100644
--- a/include/gras/CMakeLists.txt
+++ b/include/gras/CMakeLists.txt
@@ -16,8 +16,9 @@ install(FILES
     sbuffer.hpp
     sbuffer.i
     tags.hpp
-    time_tag.hpp
     tags.i
+    time_tag.hpp
+    time_tag.i
     tag_iter.hpp
     tag_iter.i
     thread_pool.hpp
diff --git a/include/gras/time_tag.hpp b/include/gras/time_tag.hpp
index d350fa2..9459f9f 100644
--- a/include/gras/time_tag.hpp
+++ b/include/gras/time_tag.hpp
@@ -11,6 +11,13 @@
 namespace gras
 {
 
+/*!
+ * TimeTag represents an absolute time or a time delta.
+ * A TimeTag can be converted to and from a tick count.
+ * Conversion support is provided for the pseudo-standard
+ * PMCTuple format often used inside a StreamTag value.
+ * And TimeTag supports overloaded arithmetic operations.
+ */
 struct GRAS_API TimeTag :
     boost::less_than_comparable<TimeTag>,
     boost::additive<TimeTag>
diff --git a/include/gras/time_tag.i b/include/gras/time_tag.i
new file mode 100644
index 0000000..fb3d721
--- /dev/null
+++ b/include/gras/time_tag.i
@@ -0,0 +1,39 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#ifndef INCLUDED_GRAS_TIME_TAG_I
+#define INCLUDED_GRAS_TIME_TAG_I
+
+%{
+#include <gras/time_tag.hpp>
+%}
+
+////////////////////////////////////////////////////////////////////////
+// remove base class warning -- boost::less_than_comparable<TimeTag>
+// remove base class warning -- boost::additive<TimeTag>
+////////////////////////////////////////////////////////////////////////
+#pragma SWIG nowarn=401
+
+%include <gras/gras.hpp>
+%include <gras/chrono.hpp>
+%include <gras/time_tag.hpp>
+%import <PMC/PMC.i>
+
+////////////////////////////////////////////////////////////////////////
+// Make it pythonic
+////////////////////////////////////////////////////////////////////////
+%extend gras::TimeTag
+{
+    bool __nonzero__(void)
+    {
+        return ($self)->to_ticks() != 0;
+    }
+
+    int __cmp__(const TimeTag &other)
+    {
+        if ((*($self)) < other) return -1;
+        if ((*($self)) > other) return +1;
+        return 0;
+    }
+}
+
+#endif /*INCLUDED_GRAS_TIME_TAG_I*/