rational.c: overhaul rational operators.

- define `MRB_TT_RATIONAL`
- change object structure (`struct RRational`)
- add memory management for `MRB_TT_RATIONAL`
- avoid operator overloading as much as possible
- implement division overloading in C
- as a result, performance improved a lot

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gc.c b/src/gc.c
index 07ca61e52..9ea3c1712 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -903,6 +903,17 @@ obj_free(mrb_state *mrb, struct RBasic *obj, int end)
     }
     break;
 
+#if defined(MRB_INT64) && defined(MRB_32BIT)
+#ifdef MRB_USE_RATIONAL
+  case MRB_TT_RATIONAL:
+    {
+      struct RData *o = (struct RData*)obj;
+      mrb_free(mrb, obj->iv_tbl);
+    }
+    break;
+#endif
+#endif
+
   default:
     break;
   }