reloc
parent
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commit
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#lang restructure/racket
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(r+p "font.rkt"
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"glyph-position.rkt"
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"subset.rkt"
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"bbox.rkt")
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#lang pitfall/racket
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(define binarizer%
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(class object%
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(super-new)
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(init-field [parts null])
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(define/public (encode x) (error 'must-override-encode))
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(define/public (decode x) (error 'must-override-encode))))
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(define Byte
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(class binarizer%
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(super-new)
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(define/override (encode x)
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(let loop ([x x])
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(cond
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[(bytes? x)
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(if (= (bytes-length x) 1)
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x
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(raise-argument-error 'Byte "byte string of length 1" x))]
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[(number? x)
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(if (<= 0 x 255)
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(bytes x)
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(raise-argument-error 'Byte "number that fits into one byte" x))]
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[(char? x) (loop (char->integer x))]
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[(symbol? x) (loop (symbol->string x))]
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[(string? x) (loop (string->bytes/latin-1 x))]
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[else (raise-argument-error 'Byte "convertible type" x)])))))
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(define (>Byte . xs)
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(apply make-object Byte xs))
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(get-field parts (>Byte 23))
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#|
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(define (Bio x)
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(define template (list 'age Byte
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'name short
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'city long))
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(if (hash? x)
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(hash->bytes x template)
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(bytes->hash x template)))
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(define h (hash 'age 24
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'name 1000
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'city 200000))
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(define bs (Bio h))
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(Bio bs)|#
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