check_select.c

   1 /*
   2  * Copyright (C) 2010 Dan Carpenter.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program 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 General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
  16  */
  17
  18 #include "smatch.h"
  19 #include "smatch_slist.h"
  20
  21 static int my_id;
  22
  23 static void match_select(struct expression *expr)
  24 {
  25         if (expr->cond_true)
  26                 return;
  27         expr = strip_expr(expr->conditional);
  28         if (expr->type != EXPR_COMPARE)
  29                 return;
  30         sm_warning("boolean comparison inside select");
  31 }
  32
  33 void check_select(int id)
  34 {
  35         my_id = id;
  36         add_hook(&match_select, SELECT_HOOK);
  37 }