Use appropriate number of digits when dumping floating point numbers.

apitrace · May 14, 2012 · 5f2245e · 5f2245e
1 parent 9db0c7a
commit 5f2245e
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/common/trace_dump.cpp b/common/trace_dump.cpp
@@ -24,6 +24,8 @@
  **************************************************************************/
 
 
+#include <limits>
+
 #include "formatter.hpp"
 #include "trace_dump.hpp"
 
@@ -89,11 +91,15 @@ class Dumper : public Visitor
     }
 
     void visit(Float *node) {
+        std::streamsize oldPrecision = os.precision(std::numeric_limits<float>::digits10 + 1);
         os << literal << node->value << normal;
+        os.precision(oldPrecision);
     }
 
     void visit(Double *node) {
+        std::streamsize oldPrecision = os.precision(std::numeric_limits<double>::digits10 + 1);
         os << literal << node->value << normal;
+        os.precision(oldPrecision);
     }
 
     void visit(String *node) {

diff --git a/retrace/json.hpp b/retrace/json.hpp
@@ -35,6 +35,7 @@
 #include <wchar.h>
 
 #include <iomanip>
+#include <limits>
 #include <ostream>
 #include <string>
 
@@ -332,7 +333,7 @@ class JSONWriter
             writeNull();
         } else {
             separator();
-            os << std::dec << std::setprecision(9) << n;
+            os << std::dec << std::setprecision(std::numeric_limits<T>::digits10 + 1) << n;
             value = true;
             space = ' ';
         }