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26 lines
637 B
Racket
26 lines
637 B
Racket
#lang br
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(require brag/support "gifparser.rkt")
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(define the-lexer
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(lexer-srcloc
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[(eof) (return-without-srcloc eof)]
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["GIF" (token 'GIF-HEADER lexeme)]
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[any-char (token 'BYTE (char->integer (car (string->list lexeme))))]
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))
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(define (make-tokenizer ip [path #f])
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(port-count-lines! ip)
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(lexer-file-path path)
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(λ () (the-lexer ip)))
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(define (munge ip)
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(parse-to-datum (make-tokenizer (reencode-input-port ip "latin1"))))
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(module+ test
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(require pitfall/binprint)
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#;(binprint (open-input-file "test.gif") #:width 24)
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#;(munge (open-input-bytes #"GIF87a1234567"))
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(munge (open-input-file "test.gif"))
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) |