class AdLint::Exam::CBuiltin::W0568

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 13155
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 13162
def check(expr, lhs_var, rhs_var, *)
  op = expr.operator.type
  return unless op == "<<" || op == "<<="
  return unless constant_expression?(expr.lhs_operand)

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

    if lhs_var.value.test_must_be_greater_than(scalar_value_of(0)).true?
      lhs_limit = scalar_value_of(lhs_var.type.max) >> rhs_var.value
      test = lhs_var.value.test_must_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 13186
def interpreter
  @interp
end