added an identifier normalization utility function

* moved iname leader characters and whitespace characters strings to
  opkele::data namespace
* added opkele::util::normalize_identifier() function

Signed-off-by: Michael Krelin <hacker@klever.net>

2 files changed, 4 insertions, 0 deletions

diff --git a/include/opkele/data.h b/include/opkele/data.h
index d0b0516..904b5ae 100644
--- a/include/opkele/data.h
+++ b/include/opkele/data.h
@@ -12,6 +12,8 @@ namespace opkele {
     namespace data {
         extern const char *_default_p;
         extern const char *_default_g;
+        extern const char *_iname_leaders;
+        extern const char *_whitespace_chars;
     }
 }
 
diff --git a/include/opkele/util.h b/include/opkele/util.h
index 60955e1..fd974a1 100644
--- a/include/opkele/util.h
+++ b/include/opkele/util.h
@@ -84,6 +84,8 @@ namespace opkele {
          */
         string rfc_3986_normalize_uri(const string& uri);
 
+        string normalize_identifier(const string& usi,bool strip_fragment);
+
         /**
          * Match URI against realm
          * @param uri URI to match