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Kawa: File checksum with MD5
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(define-alias FileInputStream java.io.FileInputStream) | |
(define-alias MessageDigest java.security.MessageDigest) | |
(define-alias Integer java.lang.Integer) | |
(require 'srfi-13) | |
;;-------------------------------------------------------------------- | |
(define (md5vector file-name ::java.lang.String) | |
(let ((md (MessageDigest:getInstance "MD5")) | |
(fis (FileInputStream file-name)) | |
(data-bytes ::byte[] ((primitive-array-new byte) 1024))) | |
(do ((nread 0 (*:read fis data-bytes))) | |
((= nread -1) (make s8vector (*:digest md))) | |
(*:update md data-bytes 0 nread)))) | |
;;-------------------------------------------------------------------- | |
(define (s8vector->hexstr mdbytes ::gnu.lists.S8Vector) | |
(string-join | |
(map (lambda(e) | |
(let((str (Integer:toHexString (bitwise-and #xff e)))) | |
(if (= (string-length str) 1) | |
(string-append "0" str) | |
str))) | |
(s8vector->list mdbytes)) | |
"")) | |
;;-------------------------------------------------------------------- |
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Muchísimo mas de hecho sin necesidad del
bitwise-and
para quitar el signo utilizando unU8Vector
:O también utilizando directamente la función
bytevector
y el operador splice@
: