;;; guile-email --- Guile email parser
;;; Copyright © 2020 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of guile-email.
;;;
;;; guile-email is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU Affero General Public License as
;;; published by the Free Software Foundation; either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; guile-email is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;; Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public
;;; License along with guile-email.  If not, see
;;; <http://www.gnu.org/licenses/>.

(use-modules (rnrs bytevectors)
             (srfi srfi-1))

(set! *random-state* (random-state-from-platform))

(define (random-bytevector len)
  "Return a random bytevector of length LEN."
  (u8-list->bytevector
   (map (lambda _ (random 256)) (iota len))))

(define (each-line-has-a-maximum-of-76-characters? str)
  (every (lambda (line)
           (<= (string-length line) 76))
         (string-split str #\newline)))