X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/a351d052dda03a2cc1af01dcef4640891f551ada..22bab86c9df047bdd258283c6567821319ba7a6f:/ghash-def.h

diff --git a/ghash-def.h b/ghash-def.h
index d8dfc3c..74699ca 100644
--- 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 1.4 2000/07/15 10:00:58 mdw Exp $
  *
  * Definitions for generic hash interface
  *
@@ -30,6 +30,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: ghash-def.h,v $
+ * 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
@@ -113,7 +116,16 @@ static void ghdestroy(ghash *h)						\
   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 -------------------------------------------------*/