/* -*-c-*-
*
- * $Id: ghash.h,v 1.1 1999/12/10 23:16:01 mdw Exp $
+ * $Id: ghash.h,v 1.5 2000/07/15 10:00:58 mdw Exp $
*
* Generic hash function interface
*
/*----- Revision history --------------------------------------------------*
*
* $Log: ghash.h,v $
+ * Revision 1.5 2000/07/15 10:00:58 mdw
+ * New generic hash operation for copying hash contexts.
+ *
+ * Revision 1.4 2000/07/03 18:08:24 mdw
+ * Include `bits.h'.
+ *
+ * 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 11:22:17 mdw
+ * Minor changes in the generic hash interface.
+ *
* Revision 1.1 1999/12/10 23:16:01 mdw
* Generic interface.
*
#include <stddef.h>
-/*----- Generic hash function interface -----------------------------------*/
+#include <mLib/bits.h>
-typedef struct gchash_base {
- const char *name; /* Name of the hash function */
- size_t hashsz; /* Size of output hash */
-} gchash_base;
+/*----- Generic hash function interface -----------------------------------*/
typedef struct ghash {
const struct ghash_ops *ops; /* Pointer to hash operations */
} ghash;
typedef struct ghash_ops {
- const gchash_base *b; /* Pointer to basic information */
+ const struct gchash *c; /* Pointer to hash class */
void (*hash)(ghash */*h*/, const void */*p*/, size_t /*sz*/); /* Hash */
- void (*done)(ghash */*h*/, void */*buf*/); /* Write result */
+ octet *(*done)(ghash */*h*/, void */*buf*/); /* Write result */
void (*destroy)(ghash */*h*/); /* Destroy hash block */
+ ghash *(*copy)(ghash */*h*/); /* Make a copy of the hash context */
} ghash_ops;
typedef struct gchash {
- gchash_base b; /* Basic bits of information */
+ const char *name; /* Name of the hash function */
+ size_t hashsz; /* Size of output hash */
ghash *(*init)(void); /* Create a new hash instance */
} gchash;