Make array.c and vm.c share value_move().

1 files changed, 27 insertions, 0 deletions

diff --git a/src/value_array.h b/src/value_array.h
new file mode 100644
index 000000000..cabd2426d
--- /dev/null
+++ b/src/value_array.h
@@ -0,0 +1,27 @@
+#ifndef MRB_VALUE_ARRAY_H__
+#define MRB_VALUE_ARRAY_H__
+
+#include "mruby.h"
+
+static inline void
+value_move(mrb_value *s1, const mrb_value *s2, size_t n)
+{
+  if (s1 > s2 && s1 < s2 + n)
+  {
+    s1 += n;
+    s2 += n;
+    while (n-- > 0) {
+      *--s1 = *--s2;
+    }
+  }
+  else if (s1 != s2) {
+    while (n-- > 0) {
+      *s1++ = *s2++;
+    }
+  }
+  else {
+    /* nothing to do. */
+  }
+}
+
+#endif /* MRB_VALUE_ARRAY_H__ */