2021-06-04 13:56:03 +00:00
|
|
|
;;; SPDX-License-Identifier: LGPL-3.0-or-later
|
|
|
|
|
;;; SPDX-FileCopyrightText: Copyright © 2010-2021 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
|
2021-06-01 15:19:24 +00:00
|
|
|
|
2020-04-27 18:27:48 +00:00
|
|
|
#lang racket/base
|
|
|
|
|
|
|
|
|
|
(provide bytes-index)
|
|
|
|
|
|
|
|
|
|
;; This should probably be in the standard library.
|
|
|
|
|
(define (bytes-index bs b)
|
|
|
|
|
(define len (bytes-length bs))
|
|
|
|
|
(let loop ((i 0))
|
|
|
|
|
(cond [(= i len) #f]
|
|
|
|
|
[(eqv? (bytes-ref bs i) b) i]
|
|
|
|
|
[else (loop (+ i 1))])))
|
