lib/hash-pjw.h

   1 /* hash-pjw.h -- declaration for a simple hash function
   2    Copyright (C) 2001, 2003, 2009-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* This file uses _GL_ATTRIBUTE_PURE.  */
  18 #if !_GL_CONFIG_H_INCLUDED
  19  #error "Please include config.h first."
  20 #endif
  21
  22 #include <stddef.h>
  23
  24 #ifdef __cplusplus
  25 extern "C" {
  26 #endif
  27
  28
  29 /* Compute a hash code for a NUL-terminated string starting at X,
  30    and return the hash code modulo TABLESIZE.
  31    The result is platform dependent: it depends on the size of the 'size_t'
  32    type and on the signedness of the 'char' type.  */
  33 extern size_t hash_pjw (void const *x, size_t tablesize) _GL_ATTRIBUTE_PURE;
  34
  35
  36 #ifdef __cplusplus
  37 }
  38 #endif