Merge branch 'master' of git+ssh://metalzone.distorted.org.uk/~mdw/public-git/catacomb/

[u/mdw/catacomb] / share.h

diff --git a/share.h b/share.h
index a875e06..d126983 100644 (file)
--- a/share.h
+++ b/share.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: share.h,v 1.3 2000/12/06 20:30:10 mdw Exp $
+ * $Id$
  *
  * Shamir's secret sharing
  *
@@ -27,22 +27,6 @@
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: share.h,v $
- * Revision 1.3  2000/12/06 20:30:10  mdw
- * Change secret sharing interface: present the secret at share
- * construction time.
- *
- * Revision 1.2  2000/06/24 18:29:05  mdw
- * Interface change: allow shares to be extracted from a context on demand,
- * rather than building them all up-front.
- *
- * Revision 1.1  2000/06/17 12:09:38  mdw
- * Shamir's secret sharing system.
- *
- */
-
 /*----- Notes on the sharing system ---------------------------------------*
  *
  * Shamir's secret-sharing system is based on polynomial interpolation modulo
@@ -150,6 +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