code: def find_prototypes(code):
      
  
      prots = []
      lines = code.split('\n')
      for line in lines:
          m = re.match("\s*" + re_func_prot, line)
          if m is not None:
              rtype, name, args = m.groups()[:3]
              if args == 'void' or args.strip() == '':
                  args = []
              else:
                  args = [tuple(arg.strip().split(' '))
                          for arg in args.split(',')]
              prots.append((name, args, rtype))
  
      return prots
docs: Return a list of signatures for each function prototype declared in *code*.
      Format is [(name, [args], rtype), ...].