163 lines
		
	
	
		
			8.4 KiB
		
	
	
	
		
			Scheme
		
	
	
	
			
		
		
	
	
			163 lines
		
	
	
		
			8.4 KiB
		
	
	
	
		
			Scheme
		
	
	
	
(define c-type-size
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  (lambda (type)
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    (size-of-type type)))
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(define foreign-c:string-split
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  (lambda (str mark)
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    (let* ((str-l (string->list str))
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           (res (list))
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           (last-index 0)
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           (index 0)
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           (splitter (lambda (c)
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                       (cond ((char=? c mark)
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                              (begin
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                                (set! res (append res (list (string-copy str last-index index))))
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                                (set! last-index (+ index 1))))
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                             ((equal? (length str-l) (+ index 1))
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                              (set! res (append res (list (string-copy str last-index (+ index 1)))))))
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                       (set! index (+ index 1)))))
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      (for-each splitter str-l)
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      res)))
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(cond-expand
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  (gambit #t) ; Defined in gambit.scm
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  (chicken #t) ; Defined in chicken.scm
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  (cyclone #t) ; Defined in cyclone.scm
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  (else
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    (define-syntax define-c-library
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      (syntax-rules ()
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        ((_ scheme-name headers object-name options)
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         (define scheme-name
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           (let* ((internal-options (if (null? 'options)
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                                      (list)
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                                      (cadr 'options)))
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                  (additional-paths (if (assoc 'additional-paths internal-options)
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                                      (cadr (assoc 'additional-paths internal-options))
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                                      (list)))
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                  (additional-versions (if (assoc 'additional-versions internal-options)
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                                         (map (lambda (version)
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                                                (if (number? version)
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                                                  (number->string version)
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                                                  version))
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                                              (cadr (assoc 'additional-versions internal-options)))
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                                         (list)))
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                  (slash (cond-expand (windows (string #\\)) (else "/")))
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                  (auto-load-paths
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                      (cond-expand
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                        (windows
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                          (append
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                            (if (get-environment-variable "FOREIGN_C_LOAD_PATH")
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                              (foreign-c:string-split (get-environment-variable "FOREIGN_C_LOAD_PATH") #\;)
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                              (list))
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                            (if (get-environment-variable "SYSTEM")
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                              (list (get-environment-variable "SYSTEM"))
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                              (list))
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                            (if (get-environment-variable "WINDIR")
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                              (list (get-environment-variable "WINDIR"))
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                              (list))
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                            (if (get-environment-variable "WINEDLLDIR0")
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                              (list (get-environment-variable "WINEDLLDIR0"))
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                              (list))
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                            (if (get-environment-variable "SystemRoot")
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                              (list (string-append
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                                      (get-environment-variable "SystemRoot")
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                                      slash
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                                      "system32"))
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                              (list))
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                            (list ".")
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                            (if (get-environment-variable "PATH")
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                              (foreign-c:string-split (get-environment-variable "PATH") #\;)
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                              (list))
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                            (if (get-environment-variable "PWD")
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                              (list (get-environment-variable "PWD"))
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                              (list))))
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                        (else
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                          (append
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                           (if (get-environment-variable "FOREIGN_C_LOAD_PATH")
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                              (foreign-c:string-split (get-environment-variable "FOREIGN_C_LOAD_PATH") #\:)
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                              (list))
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                            ; Guix
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                            (list (if (get-environment-variable "GUIX_ENVIRONMENT")
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                                    (string-append (get-environment-variable "GUIX_ENVIRONMENT") slash "lib")
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                                    "")
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                                  "/run/current-system/profile/lib")
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                            ; Debian
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                            (if (get-environment-variable "LD_LIBRARY_PATH")
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                              (foreign-c:string-split (get-environment-variable "LD_LIBRARY_PATH") #\:)
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                              (list))
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                            (list
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                              ;;; x86-64
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                              ; Debian
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                              "/lib/x86_64-linux-gnu"
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                              "/usr/lib/x86_64-linux-gnu"
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                              "/usr/local/lib"
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                              ; Fedora/Alpine
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                              "/usr/lib"
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                              "/usr/lib64"
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                              ;;; aarch64
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                              ; Debian
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                              "/lib/aarch64-linux-gnu"
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                              "/usr/lib/aarch64-linux-gnu"
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                              "/usr/local/lib"
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                              ; Fedora/Alpine
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                              "/usr/lib"
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                              "/usr/lib64"
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                              ; NetBSD
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                              "/usr/pkg/lib")))))
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                  (auto-load-versions (list ""))
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                  (paths (append auto-load-paths additional-paths))
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                  (versions (append additional-versions auto-load-versions))
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                  (platform-lib-prefix (cond-expand (windows "") (else "lib")))
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                  (platform-file-extension (cond-expand (windows ".dll") (else ".so")))
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                  (shared-object #f)
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                  (searched-paths (list)))
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             (for-each
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               (lambda (path)
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                 (for-each
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                   (lambda (version)
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                     (let ((library-path
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                             (string-append path
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                                            slash
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                                            platform-lib-prefix
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                                            object-name
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                                            (cond-expand
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                                              (windows "")
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                                              (else platform-file-extension))
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                                            (if (string=? version "")
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                                              ""
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                                              (string-append
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                                                (cond-expand (windows "-")
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                                                             (else "."))
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                                                version))
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                                            (cond-expand
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                                              (windows platform-file-extension)
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                                              (else ""))))
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                           (library-path-without-suffixes (string-append path
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                                                                         slash
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                                                                         platform-lib-prefix
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                                                                         object-name)))
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                       (set! searched-paths (append searched-paths (list library-path)))
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                       (when (and (not shared-object)
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                                  (file-exists? library-path))
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                         (set! shared-object
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                           (cond-expand (racket library-path-without-suffixes)
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                                        (else library-path))))))
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                   versions))
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               paths)
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             (if (not shared-object)
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               (begin
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                 (display "Could not load shared object: ")
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                 (write (list (cons 'object object-name)
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                              (cons 'paths paths)
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                              (cons 'platform-file-extension platform-file-extension)
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                              (cons 'versions versions)))
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                 (newline)
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                 (display "Searched paths: ")
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                 (write searched-paths)
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                 (newline)
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                 (exit 1))
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               (cond-expand
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                 (stklos shared-object)
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                 (else (shared-object-load shared-object
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                                        `((additional-versions ,additional-versions)))))))))))))
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