change time type from double to int64_t

* grapher/Graph.hxx (Graph): Change variables holding the time limits
  of the displayed graph from double to int64_t.
* grapher/Graph.cxx (Graph::draw): Do calculations of time differences
  using int64_t.
  (Graph::getExtents, Graph::setExtents): Change left and right
  arguments to int64_t.
* grapher/GraphData.hxx (GraphDataBase): Change time type to int64_t.
  (GraphDataBase::elementAsString): New function.
  (GraphData::elementAsString): Implementation of that function.
* grapher/StapParser.cxx (parseData): Parse time values from the stap
  script as 64 bit values.

1 files changed, 11 insertions, 1 deletions

diff --git a/grapher/GraphData.hxx b/grapher/GraphData.hxx
index 0e26fb4d..e06ffdb8 100644
--- a/grapher/GraphData.hxx
+++ b/grapher/GraphData.hxx
@@ -1,6 +1,9 @@
 #ifndef SYSTEMTAP_GRAPHDATA_HXX
 #define SYSTEMTAP_GRAPHDATA_HXX 1
 
+#include <stdint.h>
+
+#include <sstream>
 #include <string>
 #include <utility>
 #include <vector>
@@ -18,12 +21,13 @@ namespace systemtap
         DOT,
         EVENT
       };
-    typedef boost::circular_buffer<double> TimeList;
+    typedef boost::circular_buffer<int64_t> TimeList;
     GraphDataBase(TimeList::capacity_type cap = 50000)
       : scale(1.0), style(BAR), times(cap)
     {
       color[0] = 0.0;  color[1] = 1.0;  color[2] = 0.0;
     }
+    virtual std::string elementAsString(size_t element) = 0;
     // size of grid square at "normal" viewing
     double scale;
     double color[3];
@@ -44,6 +48,12 @@ namespace systemtap
       : GraphDataBase(cap), data(cap)
     {
     }
+    std::string elementAsString(size_t element)
+    {
+      std::ostringstream stream;
+      stream << data[element];
+      return stream.str();
+    }
     DataList data;
   };
   struct CSVData