module Byebug::EnableDisableFunctions

def enable_disable_breakpoints(is_enable, args)
  breakpoints = Byebug.breakpoints.sort_by{|b| b.id }
  largest = breakpoints.inject(0) do |tally, b|
    tally = b.id if b.id > tally
  end
  if 0 == largest
    errmsg "No breakpoints have been set.\n"
    return
  end
  args.each do |pos|
    pos = get_int(pos, "#{is_enable} breakpoints", 1, largest)
    return nil unless pos
    breakpoints.each do |b|
      if b.id == pos
        enabled = ('Enable' == is_enable)
        if enabled
          unless syntax_valid?(b.expr)
            errmsg "Expression \"#{b.expr}\" syntactically incorrect; " \
                   "breakpoint remains disabled.\n"
            break
          end
        end
        b.enabled = ('Enable' == is_enable)
        break
      end
    end
  end
end

def enable_disable_display(is_enable, args)
  if 0 == @state.display.size
    errmsg "No display expressions have been set.\n"
    return
  end
  args.each do |pos|
    pos = get_int(pos, "#{is_enable} display", 1, @state.display.size)
    return nil unless pos
    @state.display[pos-1][0] = ('Enable' == is_enable)
  end
end