internal.h: roomof

* internal.h (roomof): extract from type_roomof, and move from
  bignum.c.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50986 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun Jun 21 20:28:09 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* internal.h (roomof): extract from type_roomof, and move from
+	  bignum.c.
+
 Sun Jun 21 18:32:37 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ruby_atomic.h (ATOMIC_PTR_CAS): define by generic CAS macro, not

bignum.c

@@ -98,7 +98,6 @@ STATIC_ASSERT(sizeof_long_and_sizeof_bdigit, SIZEOF_BDIGIT % SIZEOF_LONG == 0);
     rb_absint_size(x, NULL))
 
 #define BIGDIVREM_EXTRA_WORDS 1
-#define roomof(n, m) ((long)(((n)+(m)-1) / (m)))
 #define bdigit_roomof(n) roomof(n, SIZEOF_BDIGIT)
 #define BARY_ARGS(ary) ary, numberof(ary)
 

internal.h

@@ -611,7 +611,8 @@ struct MEMO {
 
 #define MEMO_NEW(a, b, c) ((struct MEMO *)rb_imemo_new(imemo_memo, (VALUE)(a), (VALUE)(b), (VALUE)(c), 0))
 
-#define type_roomof(x, y) ((sizeof(x) + sizeof(y) - 1) / sizeof(y))
+#define roomof(x, y) (((x) + (y) - 1) / (y))
+#define type_roomof(x, y) roomof(sizeof(x), sizeof(y))
 #define MEMO_FOR(type, value) ((type *)RARRAY_PTR(value))
 #define NEW_MEMO_FOR(type, value) \
   ((value) = rb_ary_tmp_new_fill(type_roomof(type, VALUE)), MEMO_FOR(type, value))