38 lines
1.2 KiB
Scheme
38 lines
1.2 KiB
Scheme
(import (scheme)
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(chicken base)
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(chicken syntax))
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(define (snake-upcase in)
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(string-map (lambda (c)
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(if (char=? #\- c)
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#\_
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(char-upcase c)))))
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(define-syntax define-sdl-flag
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(er-macro-transformer
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(lambda (exp rename compare)
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(let ((flag (cadr exp)))
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`(begin
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(export ,flag)
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(define ,flag
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(foreign-value
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,(string-append "SDL_" (snake-upcase (symbol->string flag)))
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unsigned-int32)))))))
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(define-syntax define-sdl-enum-values
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(er-macro-transformer
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(lambda (exp rename compare)
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(let ((prefix (cadr exp))
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(type (caddr exp))
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(enum-labels (cdddr exp)))
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`(begin
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,@(map (lambda (enum-label)
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(let ((full-str (string-append (symbol->string prefix)
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"-" (symbol->string enum-label))))
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`(begin
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(export ,(string->symbol full-str))
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(define ,(string->symbol full-str)
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(foreign-value
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,(string-append "SDL_" (snake-upcase full-str))
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,type)))))
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enum-labels))))))
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