X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/28ef1f459bf28d73015d4e58afec778647eef5e0..f41f820e4b3e230d9314cc4323abf59babdd4e67:/ghash-def.h

diff --git a/ghash-def.h b/ghash-def.h
index db87d1f..d8dfc3c 100644
--- a/ghash-def.h
+++ b/ghash-def.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: ghash-def.h,v 1.2 2000/06/17 11:22:03 mdw Exp $
+ * $Id: ghash-def.h,v 1.3 2000/07/02 18:27:42 mdw Exp $
  *
  * Definitions for generic hash interface
  *
@@ -30,6 +30,12 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: ghash-def.h,v $
+ * 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
+ * address of the buffer it used.  Clients of generic hashes no longer need
+ * to use dynamically allocated memory for hash results.
+ *
  * Revision 1.2  2000/06/17 11:22:03  mdw
  * Use secure arena for memory allocation.  Minor changes in the generic
  * hash interface.
@@ -75,6 +81,7 @@ static const ghash_ops gops;						\
 typedef struct gctx {							\
   ghash h;								\
   pre##_ctx c;								\
+  octet buf[PRE##_HASHSZ];						\
 } gctx;									\
 									\
 static ghash *ghinit(void)						\
@@ -91,10 +98,13 @@ static void ghhash(ghash *h, const void *p, size_t sz)			\
   pre##_hash(&g->c, p, sz);						\
 }									\
 									\
-static void ghdone(ghash *h, void *buf)					\
+static octet *ghdone(ghash *h, void *buf)				\
 {									\
   gctx *g = (gctx *)h;							\
+  if (!buf)								\
+    buf = g->buf;							\
   pre##_done(&g->c, buf);						\
+  return (buf);								\
 }									\
 									\
 static void ghdestroy(ghash *h)						\