gcc/spellcheck-tree.c

   1 /* Find near-matches for identifiers.
   2    Copyright (C) 2015 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "tree.h"
  25 #include "spellcheck.h"
  26
  27 /* Calculate Levenshtein distance between two identifiers.  */
  28
  29 edit_distance_t
  30 levenshtein_distance (tree ident_s, tree ident_t)
  31 {
  32   gcc_assert (TREE_CODE (ident_s) == IDENTIFIER_NODE);
  33   gcc_assert (TREE_CODE (ident_t) == IDENTIFIER_NODE);
  34
  35   return levenshtein_distance (IDENTIFIER_POINTER (ident_s),
  36                                IDENTIFIER_LENGTH (ident_s),
  37                                IDENTIFIER_POINTER (ident_t),
  38                                IDENTIFIER_LENGTH (ident_t));
  39 }