check_assign_vs_compare.c

   1 /*
   2  * smatch/check_assign_vs_compare.c
   3  *
   4  * Copyright (C) 2012 Oracle.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include "smatch.h"
  11
  12 static int my_id;
  13
  14 static void match_condition(struct expression *expr)
  15 {
  16         long long val;
  17
  18         if (expr->type != EXPR_ASSIGNMENT || expr->op != '=')
  19                 return;
  20
  21         if (!get_value(expr->right, &val))
  22                 return;
  23         sm_msg("warn: was '== %lld' instead of '='", val);
  24 }
  25
  26 void check_assign_vs_compare(int id)
  27 {
  28         my_id = id;
  29         add_hook(&match_condition, CONDITION_HOOK);
  30 }