~ruther/guix-local

ce094b4663da6aa52d02f398a19e1d2892641b7d — Ludovic Courtès 8 years ago 075681d
uuid: 'uuid' macro supports more UUID types.

* gnu/system/uuid.scm (string->uuid): Turn 'type' into an optional
argument.
(uuid): Add clauses to allow for an optional 'type' parameter.
1 files changed, 14 insertions(+), 8 deletions(-)

M gnu/system/uuid.scm
M gnu/system/uuid.scm => gnu/system/uuid.scm +14 -8
@@ 206,7 206,7 @@ ISO9660 UUID representation."
   ('iso9660 => iso9660-uuid->string)
   ('fat32 'fat => fat32-uuid->string)))

(define* (string->uuid str #:key (type 'dce))
(define* (string->uuid str #:optional (type 'dce))
  "Parse STR as a UUID of the given TYPE.  On success, return the
corresponding bytevector; otherwise return #f."
  (match (vhash-assq type %uuid-parsers)


@@ 233,17 233,23 @@ corresponding bytevector; otherwise return #f."
(define-syntax uuid
  (lambda (s)
    "Return the UUID object corresponding to the given UUID representation."
    ;; TODO: Extend to types other than DCE.
    (syntax-case s ()
      ((_ str)
       (string? (syntax->datum #'str))
    (syntax-case s (quote)
      ((_ str (quote type))
       (and (string? (syntax->datum #'str))
            (identifier? #'type))
       ;; A literal string: do the conversion at expansion time.
       (let ((bv (string->uuid (syntax->datum #'str))))
       (let ((bv (string->uuid (syntax->datum #'str)
                               (syntax->datum #'type))))
         (unless bv
           (syntax-violation 'uuid "invalid UUID" s))
         #`(make-uuid 'dce #,(datum->syntax #'str bv))))
         #`(make-uuid 'type #,(datum->syntax s bv))))
      ((_ str)
       (string? (syntax->datum #'str))
       #'(uuid str 'dce))
      ((_ str)
       #'(make-uuid 'dce (string->uuid str))))))
       #'(make-uuid 'dce (string->uuid str 'dce)))
      ((_ str type)
       #'(make-uuid type (string->uuid str type))))))

(define uuid->string
  ;; Convert the given bytevector or UUID object, to the corresponding UUID