72 lines
1.9 KiB
Racket
72 lines
1.9 KiB
Racket
#lang racket/base
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(require (for-syntax racket/base)
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racket/path)
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(provide exn:fail:audio
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exn:fail:audio?
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exn:fail:audio-code
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raise-audio-error
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make-audio-error-code
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exn-audio-code
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)
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(struct exn:fail:audio exn:fail
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(code source line)
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#:transparent)
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(define exn-audio-code exn:fail:audio-code)
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(define (audio-codes)
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'(no-decoder no-encoder
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file-not-found
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invalid-audio-file
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no-audio-reader
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audio-file-corrupt
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audio-error))
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(define (make-audio-code code)
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(if (symbol? code)
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(letrec ((f (λ (l)
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(if (null? (cdr l))
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(car l)
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(if (eq? (car l) code)
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code
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(f (cdr l)))))))
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(f (audio-codes)))
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(make-audio-code (string->symbol (format "~a" code)))))
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(define (make-audio-error-code c)
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(make-audio-code c))
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(define (raise-audio-error* code source line message . args)
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(displayln (format "raise-audio-error*: code=~a source=~a line=~a message=~a args=~a" code source line message args))
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(let* ((msg (apply format (cons message args)))
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(src* (file-name-from-path (build-path source)))
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(msg* (format "~a at ~a, line ~a" msg src* line)))
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(raise (exn:fail:audio msg*
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(current-continuation-marks)
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(make-audio-code code)
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source
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line))))
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(define-syntax (raise-audio-error stx)
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(syntax-case stx ()
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((_ code message ...)
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(let ((src (syntax-source stx))
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(line (syntax-line stx)))
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#`(displayln code)
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#`(displayln (list message ...))
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#`(displayln '#,src)
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#`(displayln '#,line)
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#`(raise-audio-error* code '#,src '#,line message ...)))))
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(define (test x)
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(if (> x 10)
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(raise-audio-error 'file-notd-found "File not found: ~a" "c:/muziek/a.flac")
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#t))
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