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40 lines
1.4 KiB
Racket
40 lines
1.4 KiB
Racket
5 years ago
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#lang debug racket/base
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(require racket/class
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"base.rkt"
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"number.rkt"
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"util.rkt"
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"list.rkt"
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sugar/unstable/dict)
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(provide (all-defined-out))
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(define x:vector%
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(class x:list%
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(super-new)
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(define/override (pre-encode val)
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(unless (or (vector? val) (list? val))
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(raise-argument-error 'x:vector-encode "vector or list" val))
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(if (vector? val) (vector->list val) val))
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(define/override (post-decode val) (list->vector val))))
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(define (x:vector [type-arg #f] [len-arg #f] [length-type-arg 'count]
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#:type [type-kwarg #f]
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#:length [len-kwarg #f]
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#:count-bytes [count-bytes? #f]
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#:pre-encode [pre-proc #f]
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#:post-decode [post-proc #f]
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#:base-class [base-class x:vector%])
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(new (generate-subclass base-class pre-proc post-proc) [type (or type-arg type-kwarg)]
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[len (or len-arg len-kwarg)]
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[count-bytes? count-bytes?]))
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(define (x:vector? x) (is-a? x x:vector%))
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(module+ test
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(require rackunit)
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(check-equal? (decode (x:vector uint16be 3) #"ABCDEF") '#(16706 17220 17734))
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(check-equal? (encode (x:vector uint16be 3) '(16706 17220 17734) #f) #"ABCDEF")
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(check-equal? (encode (x:vector uint16be 3) '#(16706 17220 17734) #f) #"ABCDEF")
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(check-equal? (size (x:vector uint16be) '#(1 2 3)) 6)
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(check-equal? (size (x:vector doublebe) '#(1 2 3 4 5)) 40))
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