X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=include%2Fyaz%2Fnfa.h;h=6880c701dce9d35561615f06336703333ef63e6a;hp=76c131ebb79f6a13ce966d1b8f621030659a6852;hb=065092597b2e0234d65b25b31930cbe98ec59738;hpb=440f23de23b0c2bce38451617cd69eb106b5c2df

diff --git a/include/yaz/nfa.h b/include/yaz/nfa.h
index 76c131e..6880c70 100644
--- a/include/yaz/nfa.h
+++ b/include/yaz/nfa.h
@@ -1,6 +1,6 @@
 /*  Copyright (C) 2006, Index Data ApS
  *  See the file LICENSE for details.
- *  $Id: nfa.h,v 1.5 2006-05-05 09:14:42 heikki Exp $
+ *  $Id: nfa.h,v 1.6 2006-05-05 14:02:27 heikki Exp $
  */
 
 /**
@@ -258,6 +258,24 @@ yaz_nfa_converter *yaz_nfa_create_backref_converter (
         yaz_nfa *n, int backref_no );
 
 
+/** \brief Create a charcater range converter
+ * \param n  the nfa 
+ * \param backref_no   The backreference to reproduce
+ * \param from_char    the first character of the original range
+ * \param to_char      the first character of the target range
+ *
+ * This converter takes a backreference, and shifts the characters
+ * by a constant value. For example, translating a-z to A-Z.
+ * Note that backref 0 is always the last character that matched a 
+ * range, even if no backrefs were defined in teh nfa. This makes 
+ * it pretty useful with this converter.
+ *
+ */
+yaz_nfa_converter *yaz_nfa_create_range_converter (
+        yaz_nfa *n, int backref_no,
+        yaz_nfa_char from_char,
+        yaz_nfa_char to_char);
+
 
 /** \brief Connects converters in a chain.
  * \param n  the nfa (mostly for nmem access)