xapian-applications/omega/hashterm.h

   1 /* hashterm.h: replace the end of a long term with a hash.
   2  *
   3  * Copyright (C) 2006,2007 Olly Betts
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program 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
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  18  * USA
  19  */
  20
  21 #ifndef OMEGA_INCLUDED_HASHTERM_H
  22 #define OMEGA_INCLUDED_HASHTERM_H
  23
  24 #include <string>
  25
  26 const unsigned int MAX_SAFE_TERM_LENGTH = 240;
  27
  28 /* If term is longer than max_length, replace the end with a hashed version
  29  * so that it's exactly max_length characters long.
  30  */
  31 std::string hash_long_term(const std::string &term, unsigned int max_length);
  32
  33 #endif // OMEGA_INCLUDED_HASHTERM_H