pre-encode when calculating dict size

main
Matthew Butterick 5 years ago
parent 4d28918571
commit 2c32c29276

@ -78,7 +78,7 @@ https://github.com/mbutterick/restructure/blob/master/src/Struct.coffee
x:pointer-size-key 0))
(define fields-size (for/sum ([(key type) (in-dict @fields)]
#:when (xenomorphic-type? type))
(send type x:size (and val (dict-ref val key)) parent)))
(send type x:size (and val (send type pre-encode (dict-ref val key))) parent)))
(define pointers-size (if include-pointers (dict-ref parent x:pointer-size-key) 0))
(+ fields-size pointers-size))))

@ -79,7 +79,7 @@ https://github.com/mbutterick/restructure/blob/master/src/Array.coffee
(define/augride (x:size [val #f] [parent #f])
(when val (unless (sequence? val)
(raise-argument-error 'xarray-size "sequence" val)))
(raise-argument-error 'size "sequence" val)))
(cond
[val (define-values (new-parent len-size)
(if (x:int? @len)

@ -26,16 +26,17 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
(unless (version-type? @type)
(raise-argument-error 'x:versioned-dict "integer, procedure, symbol, or xenomorphic" @type))
(unless (and (dict? @versions) (andmap (λ (v) (or (dict? v) (x:dict? v))) (dict-values @versions)))
(raise-argument-error 'x:versioned-dict "dict of dicts or structish" @versions))
(define (select-field-set val)
(define version-key
(or (dict-ref val @version-key #f)
(raise-argument-error 'x:versioned-dict-encode "value for version key" @version-key)))
(raise-argument-error 'encode "value for version key" @version-key)))
(define field-object
(or (dict-ref @versions version-key #f)
(raise-argument-error 'x:versioned-dict-encode (format "valid field version: ~v" (dict-keys @versions)) version-key)))
(raise-argument-error 'encode (format "valid field version: ~v" (dict-keys @versions)) version-key)))
(if (x:dict? field-object) (get-field fields field-object) field-object))
(define/override (x:decode port parent [length 0])
@ -45,7 +46,7 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
[(? symbol? key) #:when parent (dict-ref parent key)]
[(? procedure? proc) #:when parent (proc parent)]
[(or (? symbol?) (? procedure?))
(raise-argument-error 'x:versioned-dict-decode "valid parent" parent)]
(raise-argument-error 'decode "valid parent" parent)]
[_ (send @type x:decode port parent)]))
(dict-set! res @version-key which-version)
@ -54,7 +55,7 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
[header-val (parse-fields port res header-val)])
(match (dict-ref @versions which-version #f)
[#false (raise-argument-error 'x:versioned-dict-decode
[#false (raise-argument-error 'decode
(format "valid field version: ~v" (dict-keys @versions)) which-version)]
[(? x:versioned-dict? vs) (send vs x:decode port parent)]
[field-object (parse-fields port res field-object)]))
@ -63,23 +64,28 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
(define/override (x:encode field-data port [parent-arg #f])
(unless (dict? field-data)
(raise-argument-error 'x:versioned-dict-encode "dict" field-data))
(raise-argument-error 'encode "dict" field-data))
(define parent (mhasheq x:pointers-key null
x:start-offset-key (pos port)
x:parent-key parent-arg
x:val-key field-data
x:pointer-size-key 0))
(hash-set! parent x:pointer-offset-key (+ (pos port) (x:size field-data parent #f)))
(unless (or (symbol? @type) (procedure? @type))
(send @type x:encode (dict-ref field-data @version-key #f) port parent))
(for ([(key type) (in-dict (dict-ref @versions 'header null))])
(send type x:encode (dict-ref field-data key) port parent))
(define fields (select-field-set field-data))
(unless (andmap (λ (key) (member key (dict-keys field-data))) (dict-keys fields))
(raise-argument-error 'x:versioned-dict-encode (format "hash that contains superset of xversioned-dict keys: ~a" (dict-keys fields)) (dict-keys field-data)))
(raise-argument-error 'encode (format "hash that contains superset of xversioned-dict keys: ~a" (dict-keys fields)) (dict-keys field-data)))
(for ([(key type) (in-dict fields)])
(send type x:encode (dict-ref field-data key) port parent))
(let loop ([i 0])
(when (< i (length (dict-ref parent x:pointers-key)))
(define ptr (list-ref (dict-ref parent x:pointers-key) i))
@ -89,7 +95,7 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
(define/override (x:size [val #f] [parent-arg #f] [include-pointers #t])
(unless val
(raise-argument-error 'x:versioned-dict-size "value" val))
(raise-argument-error 'size "value" val))
(define parent (mhasheq x:parent-key parent-arg
x:val-key val
@ -102,10 +108,13 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
(define header-size
(for/sum ([(key type) (in-dict (dict-ref @versions 'header null))])
(send type x:size (and val (dict-ref val key)) parent)))
(define fields-size
(for/sum ([(key type) (in-dict (select-field-set val))])
(send type x:size (and val (dict-ref val key)) parent)))
(send type x:size (and val (send type pre-encode (dict-ref val key))) parent)))
(define pointer-size (if include-pointers (dict-ref parent x:pointer-size-key) 0))
(+ version-size header-size fields-size pointer-size))))
(define (x:versioned-dict? x) (is-a? x x:versioned-dict%))

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