nss/simple-nss-hash.h

   1 /* __simple_nss_hash for testing nss_hash function
   2    Copyright (C) 2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SIMPLE_NSS_HASH_H
  20 #define _SIMPLE_NSS_HASH_H 1
  21
  22 #include <stdint.h>
  23
  24 /* For testing/benchmarking purposes.  Real implementation in
  25    nss/nss_hash.c.  */
  26 static uint32_t
  27 __attribute__ ((unused))
  28 __simple_nss_hash (const void *keyarg, size_t len)
  29 {
  30   const unsigned char *key;
  31   size_t i;
  32   uint32_t h = 0;
  33   key = keyarg;
  34
  35   for (i = 0; i < len; ++i)
  36     h = *key++ + 65599 * h;
  37
  38   return h;
  39 }
  40
  41
  42 #endif /* simple-nss-hash.h */