class AdLint::Exam::CBuiltin::W0570

Public Class Methods

new(phase_ctxt) click to toggle source
Calls superclass method AdLint::Examination::new
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13245
def initialize(phase_ctxt)
  super
  @interp = phase_ctxt[:cc1_interpreter]
  @interp.on_shift_expr_evaled += T(:check)
end

Private Instance Methods

check(expr, lhs_var, rhs_var, *) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13252
def check(expr, lhs_var, rhs_var, *)
  op = expr.operator.type
  return unless op == "<<" || op == "<<="
  return if constant_expression?(expr.lhs_operand)

  if lhs_var.type.signed?
    if lhs_var.value.test_must_be_less_than(scalar_value_of(0)).false?
      test = lhs_var.value.test_may_be_less_than(scalar_value_of(0))
      if test.true?
        W(expr.location,
          *test.evidence.emit_context_messages(self, expr.location))
        return
      end
    end

    lhs_limit = scalar_value_of(lhs_var.type.max) >> rhs_var.value
    if lhs_var.value.test_must_be_greater_than(lhs_limit).false?
      test = lhs_var.value.test_may_be_greater_than(lhs_limit)
      if test.true?
        W(expr.location,
          *test.evidence.emit_context_messages(self, expr.location))
      end
    end
  end
end
interpreter() click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13278
def interpreter
  @interp
end