diff options
Diffstat (limited to 'guix/hash.scm')
| -rw-r--r-- | guix/hash.scm | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/guix/hash.scm b/guix/hash.scm index 39834043e1..8d7ba21425 100644 --- a/guix/hash.scm +++ b/guix/hash.scm @@ -101,6 +101,7 @@ output port." (open-sha256-md)) (define digest #f) + (define position 0) (define (finalize!) (let ((ptr (md-read sha256-md 0))) @@ -114,14 +115,18 @@ output port." 0) (let ((ptr (bytevector->pointer bv offset))) (md-write sha256-md ptr len) + (set! position (+ position len)) len))) + (define (get-position) + position) + (define (close) (unless digest (finalize!))) (values (make-custom-binary-output-port "sha256" - write! #f #f + write! get-position #f close) (lambda () (unless digest |