New function and example program computes Fibonacci numbers fairly fast.

[u/mdw/catacomb] / share.h

diff --git a/share.h b/share.h
index 9683c07..5500a4c 100644 (file)
--- a/share.h
+++ b/share.h
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: share.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
  *
  * Shamir's secret sharing
  *
  * (c) 2000 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,12 +15,12 @@
  * it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
- * 
+ *
  * Catacomb is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Library General Public
  * License along with Catacomb; if not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
@@ -134,6 +134,17 @@ extern void share_mkshares(share */*s*/, grand */*r*/, mp */*n*/);
 
 extern mp *share_get(share */*s*/, mp */*d*/, unsigned /*x*/);
 
+/* --- @share_addedp@ --- *
+ *
+ * Arguments:  @share *s@ = pointer to sharing context
+ *             @unsigned x@ = which share number to check
+ *
+ * Returns:    Nonzero if share @x@ has been added already, zero if it
+ *             hasn't.
+ */
+
+extern int share_addedp(share */*s*/, unsigned /*x*/);
+
 /* --- @share_add@ --- *
  *
  * Arguments:  @share *s@ = pointer to sharing context