class AdLint::Exam::CBuiltin::W0105

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 2504
def initialize(phase_ctxt)
  super
  interp = phase_ctxt[:cc1_interpreter]
  interp.on_function_started            += T(:start_function)
  interp.on_function_ended              += T(:check_constant_parameters)
  interp.on_parameter_defined           += T(:add_parameter)
  interp.on_variable_value_updated      += T(:write_parameter)
  interp.on_indirection_expr_evaled     += T(:handle_indirection)
  interp.on_array_subscript_expr_evaled += T(:handle_array_subscript)
  @var_relationship = nil
  @params = nil
end

Private Instance Methods

add_parameter(param_def, var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 2523
def add_parameter(param_def, var)
  if @params && var.type.pointer? && var.named?
    @params[var] = [param_def.location, false]
  end
end
check_constant_parameters(*) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 2551
def check_constant_parameters(*)
  return unless @params

  @params.each do |ptr, (loc, written)|
    base_type = ptr.type.unqualify.base_type
    unless base_type.function?
      unless written || base_type.const?
        W(loc, ptr.name)
      end
    end
  end

  @var_relationship = nil
  @params = nil
end
handle_array_subscript(expr, ary_or_ptr, *, rslt_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 2545
def handle_array_subscript(expr, ary_or_ptr, *, rslt_var)
  if @var_relationship && ary_or_ptr.type.pointer?
    @var_relationship[rslt_var] = ary_or_ptr
  end
end
handle_indirection(*, var, derefed_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 2539
def handle_indirection(*, var, derefed_var)
  if @var_relationship
    @var_relationship[derefed_var] = var
  end
end
start_function(*) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 2518
def start_function(*)
  @var_relationship = {}
  @params = {}
end
write_parameter(*, var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 2529
def write_parameter(*, var)
  return unless @var_relationship && @params

  if ptr = @var_relationship[var]
    if @params.include?(ptr)
      @params[ptr][1] = true
    end
  end
end