/* -*-c-*-
*
- * $Id: gfshare.h,v 1.7 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
*
* Secret sharing over %$\gf{2^8}$%
*
* (c) 2000 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of Catacomb.
*
* 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,
#define GFSHARE_INIT(t, sz) { t, 0, sz, 0 }
+#define GFSHARE_INDEX(s, i) ((s)->v[(i) * ((s)->sz + 1)])
+
/*----- Functions provided ------------------------------------------------*/
/* --- @gfshare_create@ --- *
extern void gfshare_get(gfshare */*s*/, unsigned /*x*/, void */*buf*/);
+/* --- @gfshare_addedp@ --- *
+ *
+ * Arguments: @gfshare *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 gfshare_addedp(gfshare */*s*/, unsigned /*x*/);
+
/* --- @gfshare_add@ --- *
*
* Arguments: @gfshare *s@ = pointer to sharing context