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-rw-r--r--include/mruby/numeric.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/mruby/numeric.h b/include/mruby/numeric.h
index 17291c2f2..63a5eb300 100644
--- a/include/mruby/numeric.h
+++ b/include/mruby/numeric.h
@@ -25,6 +25,21 @@ mrb_value mrb_fixnum_mul(mrb_state *mrb, mrb_value x, mrb_value y);
mrb_value mrb_num_div(mrb_state *mrb, mrb_value x, mrb_value y);
mrb_float mrb_to_flo(mrb_state *mrb, mrb_value x);
+#define MRB_UINT_MAKE2(n) uint ## n ## _t
+#define MRB_UINT_MAKE(n) MRB_UINT_MAKE2(n)
+#define mrb_uint MRB_UINT_MAKE(MRB_INT_BIT)
+
+#ifdef MRB_WORD_BOXING
+# define MRB_INT_OVERFLOW_MASK ((mrb_uint)1 << (MRB_INT_BIT - 1 - MRB_FIXNUM_SHIFT))
+#else
+# define MRB_INT_OVERFLOW_MASK ((mrb_uint)1 << (MRB_INT_BIT - 1))
+#endif
+
+#undef MRB_INT_OVERFLOW_MASK
+#undef mrb_uint
+#undef MRB_UINT_MAKE
+#undef MRB_UINT_MAKE2
+
#if defined(__cplusplus)
} /* extern "C" { */
#endif