/* -*-c-*-
*
- * $Id: gfshare.h,v 1.7 2004/04/08 01:36:15 mdw Exp $
+ * $Id$
*
* Secret sharing over %$\gf{2^8}$%
*
#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