check_bitwise_or.c

   1 /*
   2  * sparse/check_bitwise_or.c
   3  *
   4  * Copyright (C) 2009 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 /*
  11  * I can't think of a place where it makes sense to use a bitwise
  12  * or in a condition.  Either people want bitwise and or regular or.
  13  */
  14
  15 #include "smatch.h"
  16
  17 static int my_id;
  18
  19 static void match_condition(struct expression *expr)
  20 {
  21         expr = strip_expr(expr);
  22         if (expr->type != EXPR_BINOP)
  23                 return;
  24         if (expr->op == '|')
  25                 sm_msg("error: bitwise or used in condition.");
  26 }
  27
  28 void check_bitwise_or(int id)
  29 {
  30         my_id = id;
  31         add_hook(&match_condition, CONDITION_HOOK);
  32 }