class AdLint::Exam::CBuiltin::W1051

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 20986
def initialize(phase_ctxt)
  super
  @interp = phase_ctxt[:cc1_interpreter]
  @interp.on_multiplicative_expr_evaled += T(:check)
  @interp.on_additive_expr_evaled       += T(:check)
end

Private Instance Methods

check(expr, lhs_var, rhs_var, rslt_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 20994
def check(expr, lhs_var, rhs_var, rslt_var)
  return unless lhs_var.type.scalar? && lhs_var.type.unsigned?
  return unless rhs_var.type.scalar? && rhs_var.type.unsigned?
  return unless lhs_var.value.scalar? && rhs_var.value.scalar?

  case expr.operator.type
  when "+"
    unbound_val = lhs_var.value + rhs_var.value
  when "-"
    unbound_val = lhs_var.value - rhs_var.value
  when "*"
    unbound_val = lhs_var.value * rhs_var.value
  else
    return
  end

  lower_test = unbound_val < scalar_value_of(rslt_var.type.min)
  upper_test = unbound_val > scalar_value_of(rslt_var.type.max)

  if lower_test.test_must_be_true.true? ||
      upper_test.test_must_be_true.true?
    W(expr.location, rslt_var.type.brief_image)
  end
end
interpreter() click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 21019
def interpreter
  @interp
end