20 lines
547 B
Scheme
20 lines
547 B
Scheme
#lang scheme
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(define-struct store (write read))
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(define (dir-store home)
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(make-store
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(lambda (key value)
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(with-output-to-file
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(build-path home (bytes->string/utf-8 key))
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(lambda ()
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(write value))
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#:exists 'replace))
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(lambda (key)
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(with-input-from-file
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(build-path home (bytes->string/utf-8 key))
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(lambda () (read))))))
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(provide/contract
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[struct store ([write (bytes? bytes? . -> . void)]
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[read (bytes? . -> . bytes?)])]
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[dir-store (path-string? . -> . store?)]) |