xapian-applications/omega/hashterm.h

   1 /** @file
   2  * @brief replace the end of a long term with a hash.
   3  */
   4 /* Copyright (C) 2006,2007 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  19  * USA
  20  */
  21
  22 #ifndef OMEGA_INCLUDED_HASHTERM_H
  23 #define OMEGA_INCLUDED_HASHTERM_H
  24
  25 #include <string>
  26
  27 const unsigned int MAX_SAFE_TERM_LENGTH = 240;
  28
  29 /* If term is longer than max_length, replace the end with a hashed version
  30  * so that it's exactly max_length characters long.
  31  */
  32 std::string hash_long_term(const std::string &term, unsigned int max_length);
  33
  34 #endif // OMEGA_INCLUDED_HASHTERM_H