118 lines
2.9 KiB
Racket
118 lines
2.9 KiB
Racket
#lang racket/base
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(require racket/string
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racket/port
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json
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)
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(provide while
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until
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get-lib-path
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do-for
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esc-quote
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esc-double-quote
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fromJson
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mk-js-array
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js-code
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list-of-kv?
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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 (get-lib-path lib)
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(let ((platform (system-type)))
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(cond
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[(eq? platform 'windows)
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(let ((try1 (build-path (current-directory) ".." "lib" "dll" lib))
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(try2 (build-path (current-directory) "lib" "dll" lib)))
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(if (file-exists? try1)
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try1
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try2)
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)]
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[else
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(error (format "Install the shared library: ~a" lib))]
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)))
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(define (esc-quote str)
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(string-replace str "'" "\\'"))
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(define (esc-double-quote str)
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(string-replace str "\"" "\\\""))
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(define (fromJson str)
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(with-input-from-string str read-json))
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(define (mk-js-array l)
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(if (list? l)
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(string-append "[ " (string-join (map (λ (e) (format "'~a'"
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(esc-quote (format "~a" e)))) l) ", ") " ]")
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(format "[ '~a' ]" (esc-quote (format "~a" l)))
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)
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)
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(define (js-code . a)
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(define (code* l)
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(if (null? l)
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""
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(string-append (car l) "\n" (code* (cdr l)))
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)
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)
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(code* a))
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(define (list-of-kv? l)
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(define (kv? e)
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(let ((e (car l)))
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(and (list? e)
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(= (length e) 2)
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(symbol? (car e)))))
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(define (all-kv? l)
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(if (null? l)
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#t
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(if (kv? (car e))
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(all-kv? (cdr l))
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#f)))
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(if (list? l)
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(all-kv? l)
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#f))
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