check_divide_condition.c

   1 /*
   2  * Copyright (C) 2022 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_extra.h"
  20
  21 static int my_id;
  22
  23 static void match_condition1(struct expression *expr)
  24 {
  25         char *left, *right;
  26
  27         if (expr->type != EXPR_BINOP || expr->op != '/')
  28                 return;
  29
  30         if (get_macro_name(expr->pos))
  31                 return;
  32
  33         left = expr_to_str(expr->left);
  34         right = expr_to_str(expr->right);
  35         sm_warning("replace divide condition '%s / %s' with '%s >= %s'",
  36                    left, right, left, right);
  37         free_string(left);
  38         free_string(right);
  39 }
  40
  41 void check_divide_condition(int id)
  42 {
  43         my_id = id;
  44
  45         add_hook(&match_condition1, CONDITION_HOOK);
  46 }