1 files changed, 30 insertions, 0 deletions
diff --git a/template/sizes.c.tmpl b/template/sizes.c.tmpl
new file mode 100644
index 0000000000..e47eadebb7
--- /dev/null
+++ b/template/sizes.c.tmpl
@@ -0,0 +1,30 @@
+%#  -*- c -*-
+#include "ruby/ruby.h"
+<%
+class String
+  def tr_cpp
+    strip.upcase.tr_s("^A-Z0-9_*", "_").tr_s("*", "P")
+  end
+end
+types = ARGF.grep(/^\s*RUBY_CHECK_SIZEOF\((\w[^\[\],#]*)[^#]*\)/) {$1}
+conditions = {
+  "long long" => 'defined(HAVE_TRUE_LONG_LONG)',
+}
+%>
+void
+Init_sizes(void)
+{
+    VALUE s = rb_hash_new();
+    rb_define_const(rb_define_module("RbConfig"), "SIZEOF", s);
+
+#define DEFINE(type, size) rb_hash_aset(s, rb_str_new_cstr(#type), INT2FIX(SIZEOF_##size));
+
+% types.each do |type|
+%   cond = conditions[type]
+#if SIZEOF_<%= type.tr_cpp %> != 0<%= " && #{cond}" if cond %>
+    DEFINE(<%= type %>, <%= type.tr_cpp %>);
+#endif
+% end
+
+#undef DEFINE
+}