* file.c (rb_str_normalize_ospath):

HFS Plus (Mac OS Extended) uses a variant of Normal Form D in which
  U+2000 through U+2FFF, U+F900 through U+FAFF, and U+2F800 through
  U+2FAFF are not decomposed (this avoids problems with round trip
  conversions from old Mac text encodings).
  http://developer.apple.com/library/mac/qa/qa1173/_index.html
  Therefore fix r42457 to exclude the range.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42498 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/-test-/string/depend

@@ -2,3 +2,4 @@ $(OBJS): $(HDRS) $(ruby_headers) \
   $(hdrdir)/ruby/encoding.h \
   $(hdrdir)/ruby/oniguruma.h
 qsort.o: $(hdrdir)/ruby/util.h
+normalize.o: $(top_srcdir)/internal.h

ext/-test-/string/extconf.rb

@@ -1,3 +1,4 @@
+$INCFLAGS << " -I$(topdir) -I$(top_srcdir)"
 $srcs = Dir[File.join($srcdir, "*.{#{SRC_EXT.join(%q{,})}}")]
 inits = $srcs.map {|s| File.basename(s, ".*")}
 inits.delete("init")

ext/-test-/string/normalize.c

@@ -0,0 +1,18 @@
+#include "ruby.h"
+#include "internal.h"
+
+#ifdef __APPLE__
+static VALUE
+normalize_ospath(VALUE str)
+{
+    return rb_str_normalize_ospath(RSTRING_PTR(str), RSTRING_LEN(str));
+}
+#else
+#define normalize_ospath rb_f_notimplement
+#endif
+
+void
+Init_normalize(VALUE klass)
+{
+    rb_define_method(klass, "normalize_ospath", normalize_ospath, 0);
+}