76 lines
2.3 KiB
Racket
76 lines
2.3 KiB
Racket
(module utils racket/base
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(require racket/path
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racket/runtime-path
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ffi/unsafe
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setup/dirs
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"downloader.rkt"
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)
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(provide while
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until
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build-lib-path
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get-lib
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do-for
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)
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(define-syntax while
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(syntax-rules ()
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((_ cond body ...)
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(letrec ((while-f (lambda (last-result)
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(if cond
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(let ((last-result (begin
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body
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...)))
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(while-f last-result))
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last-result))))
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(while-f #f))
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)
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))
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(define-syntax until
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(syntax-rules ()
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((_ cond body ...)
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(letrec ((until-f (lambda (last-result)
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(if cond
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last-result
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(let ((last-reult (begin
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body
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...)))
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(until-f last-result))))))
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(until-f #f)))))
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(define-syntax do-for
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(syntax-rules ()
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((_ (init cond next) body ...)
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(begin
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init
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(letrec ((do-for-f (lamba ()
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(if cond
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(begin
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(begin
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body
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...)
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next
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(do-for-f))))))
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(do-for-f))))))
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(define (build-lib-path)
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(soundlibs-directory))
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(define (get-lib* libs-to-try orig-libs versions)
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(unless (soundlibs-available?)
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(download-soundlibs))
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(if (null? libs-to-try)
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(error (format "Cannot find library, tried ~a" orig-libs))
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(ffi-lib (car libs-to-try) versions
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#:get-lib-dirs (λ () (cons (build-lib-path) (get-lib-search-dirs)))
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#:fail (λ () (get-lib* (cdr libs-to-try) orig-libs versions))
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)))
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(define (get-lib libs-to-try versions)
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(get-lib* libs-to-try libs-to-try versions))
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) ; end of module
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