add lout::misc::roundInt() for double -> int conversion

Add lout::misc::roundInt() and use it for double -> int conversion
instead of doing the + 0.5 trick all over the place. It was wrong for
negative values and we might even replace roundInt() with rint() from
libm in the future.

Reported-by: corvid

1 files changed, 5 insertions, 0 deletions

diff --git a/lout/misc.hh b/lout/misc.hh
index 393bac0c..e78e7576 100644
--- a/lout/misc.hh
+++ b/lout/misc.hh
@@ -38,6 +38,11 @@ inline void assertNotReached ()
    abort ();
 }
 
+inline int roundInt(double d)
+{
+   return (int) ((d > 0) ? (d + 0.5) : (d - 0.5));
+}
+
 /**
  * \brief Instances of a sub class of this interface may be compared (less,
  *    greater).