chiark - git - mdw - catacomb/blob - ghash-def.h

   1 /* -*-c-*-
   2  *
   3  * $Id: ghash-def.h,v 1.2 2000/06/17 11:22:03 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 1.2  2000/06/17 11:22:03  mdw
  34  * Use secure arena for memory allocation.  Minor changes in the generic
  35  * hash interface.
  36  *
  37  * Revision 1.1  1999/12/10 23:21:37  mdw
  38  * Generic interface.
  39  *
  40  */
  41
  42 #ifndef CATACOMB_GHASH_DEF_H
  43 #define CATACOMB_GHASH_DEF_H
  44
  45 #ifdef __cplusplus
  46   extern "C" {
  47 #endif
  48
  49 /*----- Header files ------------------------------------------------------*/
  50
  51 #include <mLib/bits.h>
  52 #include <mLib/sub.h>
  53
  54 #ifndef CATACOMB_ARENA_H
  55 #  include "arena.h"
  56 #endif
  57
  58 #ifndef CATACOMB_GHASH_H
  59 #  include "ghash.h"
  60 #endif
  61
  62 /*----- Generic hash function interface -----------------------------------*/
  63
  64 /* --- @GHASH_DEF@ --- *
  65  *
  66  * Arguments:   @PRE, pre@ = prefixes for hash function
  67  *
  68  * Use:         Defines the generic hash instance.
  69  */
  70
  71 #define GHASH_DEF(PRE, pre)                                             \
  72                                                                         \
  73 static const ghash_ops gops;                                            \
  74                                                                         \
  75 typedef struct gctx {                                                   \
  76   ghash h;                                                              \
  77   pre##_ctx c;                                                          \
  78 } gctx;                                                                 \
  79                                                                         \
  80 static ghash *ghinit(void)                                              \
  81 {                                                                       \
  82   gctx *g = S_CREATE(gctx);                                             \
  83   g->h.ops = &gops;                                                     \
  84   pre##_init(&g->c);                                                    \
  85   return (&g->h);                                                       \
  86 }                                                                       \
  87                                                                         \
  88 static void ghhash(ghash *h, const void *p, size_t sz)                  \
  89 {                                                                       \
  90   gctx *g = (gctx *)h;                                                  \
  91   pre##_hash(&g->c, p, sz);                                             \
  92 }                                                                       \
  93                                                                         \
  94 static void ghdone(ghash *h, void *buf)                                 \
  95 {                                                                       \
  96   gctx *g = (gctx *)h;                                                  \
  97   pre##_done(&g->c, buf);                                               \
  98 }                                                                       \
  99                                                                         \
 100 static void ghdestroy(ghash *h)                                         \
 101 {                                                                       \
 102   gctx *g = (gctx *)h;                                                  \
 103   S_DESTROY(g);                                                         \
 104 }                                                                       \
 105                                                                         \
 106 static const ghash_ops gops = { &pre, ghhash, ghdone, ghdestroy };      \
 107 const gchash pre = { #pre, PRE##_HASHSZ, ghinit };
 108
 109 /*----- That's all, folks -------------------------------------------------*/
 110
 111 #ifdef __cplusplus
 112   }
 113 #endif
 114
 115 #endif