git.distorted.org.uk Git - u/mdw/catacomb/blob - ghash-def.h

   1 /* -*-c-*-
   2  *
   3  * $Id: ghash-def.h,v 1.1 1999/12/10 23:21:37 mdw Exp $
   4  *
   5  * Definitions for generic hash 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-def.h,v $
  33  * Revision 1.1  1999/12/10 23:21:37  mdw
  34  * Generic interface.
  35  *
  36  */
  37
  38 #ifndef CATACOMB_GHASH_DEF_H
  39 #define CATACOMB_GHASH_DEF_H
  40
  41 #ifdef __cplusplus
  42   extern "C" {
  43 #endif
  44
  45 /*----- Header files ------------------------------------------------------*/
  46
  47 #include <mLib/bits.h>
  48 #include <mLib/sub.h>
  49
  50 #ifndef CATACOMB_GHASH_H
  51 #  include "ghash.h"
  52 #endif
  53
  54 /*----- Generic hash function interface -----------------------------------*/
  55
  56 /* --- @GHASH_DEF@ --- *
  57  *
  58  * Arguments:   @PRE, pre@ = prefixes for hash function
  59  *
  60  * Use:         Defines the generic hash instance.
  61  */
  62
  63 #define GHASH_DEF(PRE, pre)                                             \
  64                                                                         \
  65 static const ghash_ops gops;                                            \
  66                                                                         \
  67 typedef struct gctx {                                                   \
  68   ghash h;                                                              \
  69   pre##_ctx c;                                                          \
  70 } gctx;                                                                 \
  71                                                                         \
  72 static ghash *ghinit(void)                                              \
  73 {                                                                       \
  74   gctx *g = CREATE(gctx);                                               \
  75   g->h.ops = &gops;                                                     \
  76   pre##_init(&g->c);                                                    \
  77   return (&g->h);                                                       \
  78 }                                                                       \
  79                                                                         \
  80 static void ghhash(ghash *h, const void *p, size_t sz)                  \
  81 {                                                                       \
  82   gctx *g = (gctx *)h;                                                  \
  83   pre##_hash(&g->c, p, sz);                                             \
  84 }                                                                       \
  85                                                                         \
  86 static void ghdone(ghash *h, void *buf)                                 \
  87 {                                                                       \
  88   gctx *g = (gctx *)h;                                                  \
  89   pre##_done(&g->c, buf);                                               \
  90 }                                                                       \
  91                                                                         \
  92 static void ghdestroy(ghash *h)                                         \
  93 {                                                                       \
  94   gctx *g = (gctx *)h;                                                  \
  95   DESTROY(g);                                                           \
  96 }                                                                       \
  97                                                                         \
  98 static const ghash_ops gops = { &pre.b, ghhash, ghdone, ghdestroy };    \
  99 const gchash pre = { { #pre, PRE##_HASHSZ }, ghinit };
 100
 101 /*----- That's all, folks -------------------------------------------------*/
 102
 103 #ifdef __cplusplus
 104   }
 105 #endif
 106
 107 #endif