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   1 /* -*-c-*-
   2  *
   3  * $Id: ghash.h,v 1.1 1999/12/10 23:16:01 mdw Exp $
   4  *
   5  * Generic hash function interface
   6  *
   7  * (c) 1999 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  14  * Catacomb is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * Catacomb is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with Catacomb; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: ghash.h,v $
  33  * Revision 1.1  1999/12/10 23:16:01  mdw
  34  * Generic interface.
  35  *
  36  */
  37
  38 #ifndef CATACOMB_GHASH_H
  39 #define CATACOMB_GHASH_H
  40
  41 #ifdef __cplusplus
  42   extern "C" {
  43 #endif
  44
  45 /*----- Header files ------------------------------------------------------*/
  46
  47 #include <stddef.h>
  48
  49 /*----- Generic hash function interface -----------------------------------*/
  50
  51 typedef struct gchash_base {
  52   const char *name;                     /* Name of the hash function */
  53   size_t hashsz;                        /* Size of output hash */
  54 } gchash_base;
  55
  56 typedef struct ghash {
  57   const struct ghash_ops *ops;          /* Pointer to hash operations */
  58 } ghash;
  59
  60 typedef struct ghash_ops {
  61   const gchash_base *b;                 /* Pointer to basic information */
  62   void (*hash)(ghash */*h*/, const void */*p*/, size_t /*sz*/); /* Hash */
  63   void (*done)(ghash */*h*/, void */*buf*/); /* Write result */
  64   void (*destroy)(ghash */*h*/);        /* Destroy hash block */
  65 } ghash_ops;
  66
  67 typedef struct gchash {
  68   gchash_base b;                        /* Basic bits of information */
  69   ghash *(*init)(void);                 /* Create a new hash instance */
  70 } gchash;
  71
  72 /*----- That's all, folks -------------------------------------------------*/
  73
  74 #ifdef __cplusplus
  75   }
  76 #endif
  77
  78 #endif