* ext/socket/mkconstants.rb: use erb for generating code.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21672 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Mon Jan 19 22:31:35 2009  Tanaka Akira  <akr@fsij.org>
+
+	* ext/socket/mkconstants.rb: use erb for generating code.
+
 Mon Jan 19 17:33:47 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* string.c (hash): defaulted to MurmurHash 2.0.

ext/socket/mkconstants.rb

@@ -74,12 +74,17 @@ def each_name(pat)
   }
 end
 
-MISSING_DEFS = {}
+ERB.new(<<'EOS', nil, '%').def_method(Object, "gen_const_decls")
+% each_const  {|guard, define, name, default_value|
+%    if default_value
+#ifndef <%=name%>
+# define <%=name%> <%=default_value%>
+#endif
+%    end
+% }
+EOS
 
 ERB.new(<<'EOS', nil, '%').def_method(Object, "gen_const_defs_in_guard(define, name, default_value)")
-% if  default_value
-%    MISSING_DEFS[name] = default_value
-% end
 #if defined(<%=name%>)
     <%=define%>(<%=c_str name%>, <%=name%>);
 #endif
@@ -271,10 +276,8 @@ init_constants(VALUE mConst)
 EOS
 
 header_result = ERB.new(<<'EOS', nil, '%').result(binding)
-<%= MISSING_DEFS.map {|name, value| ["\#ifndef #{name}", "\# define #{name} #{value}", '#endif']}.join("\n") %>
-
+<%= gen_const_decls %>
 <%= NAME_TO_INT_DEFS.map {|decl, func| decl }.join("\n") %>
-
 <%= INTERN_DEFS.map {|vardef, gen_hash, decl, func| decl }.join("\n") %>
 EOS