Add an internal-representation no-op function.

[u/mdw/catacomb] / ghash-def.h

diff --git a/ghash-def.h b/ghash-def.h
index d8dfc3c..9065f5b 100644 (file)
--- a/ghash-def.h
+++ b/ghash-def.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: ghash-def.h,v 1.3 2000/07/02 18:27:42 mdw Exp $
+ * $Id: ghash-def.h,v 1.5 2001/01/25 21:39:58 mdw Exp $
  *
  * Definitions for generic hash interface
  *
@@ -30,6 +30,12 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: ghash-def.h,v $
+ * Revision 1.5  2001/01/25 21:39:58  mdw
+ * Burn the hash context when it's done with, for paranoia's sake.
+ *
+ * Revision 1.4  2000/07/15 10:00:58  mdw
+ * New generic hash operation for copying hash contexts.
+ *
  * Revision 1.3  2000/07/02 18:27:42  mdw
  * (ghash->ops->done): Interface change.  Passing in a null buffer pointer
  * uses a buffer internal to the ghash object.  The operation returns the
@@ -65,6 +71,10 @@
 #  include "ghash.h"
 #endif
 
+#ifndef CATACOMB_PARANOIA_H
+#  include "paranoia.h"
+#endif
+
 /*----- Generic hash function interface -----------------------------------*/
 
 /* --- @GHASH_DEF@ --- *
@@ -110,10 +120,20 @@ static octet *ghdone(ghash *h, void *buf)                         \
 static void ghdestroy(ghash *h)                                                \
 {                                                                      \
   gctx *g = (gctx *)h;                                                 \
+  BURN(*g);                                                            \
   S_DESTROY(g);                                                                \
 }                                                                      \
                                                                        \
-static const ghash_ops gops = { &pre, ghhash, ghdone, ghdestroy };     \
+static ghash *ghcopy(ghash *h)                                         \
+{                                                                      \
+  gctx *g = (gctx *)h;                                                 \
+  gctx *gg = S_CREATE(gctx);                                           \
+  memcpy(gg, g, sizeof(gctx));                                         \
+  return (&gg->h);                                                     \
+}                                                                      \
+                                                                       \
+static const ghash_ops gops =                                          \
+  { &pre, ghhash, ghdone, ghdestroy, ghcopy };                         \
 const gchash pre = { #pre, PRE##_HASHSZ, ghinit };
 
 /*----- That's all, folks -------------------------------------------------*/