121 lines
3.8 KiB
Scheme
121 lines
3.8 KiB
Scheme
(define pffi-type->native-type
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(lambda (type)
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(cond ((equal? type 'int8) _int8)
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((equal? type 'uint8) _uint8)
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((equal? type 'int16) _int16)
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((equal? type 'uint16) _uint16)
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((equal? type 'int32) _int32)
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((equal? type 'uint32) _uint32)
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((equal? type 'int64) _int64)
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((equal? type 'uint64) _uint64)
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((equal? type 'char) _int8)
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((equal? type 'unsigned-char) _uint8)
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((equal? type 'short) _short)
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((equal? type 'unsigned-short) _ushort)
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((equal? type 'int) _int)
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((equal? type 'unsigned-int) _uint)
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((equal? type 'long) _long)
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((equal? type 'unsigned-long) _ulong)
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((equal? type 'float) _float)
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((equal? type 'double) _double)
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((equal? type 'pointer) _pointer)
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((equal? type 'void) _void)
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((equal? type 'callback) _pointer)
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((equal? type 'string) _pointer)
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((equal? type 'struct) _pointer)
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(else #f))))
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(define pffi-pointer?
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(lambda (object)
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(cpointer? object)))
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(define-syntax pffi-define
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(syntax-rules ()
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((pffi-define scheme-name shared-object c-name return-type argument-types)
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(define scheme-name
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(get-ffi-obj c-name
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shared-object
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(_cprocedure (mlist->list (map pffi-type->native-type argument-types))
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(pffi-type->native-type return-type)))))))
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(define-syntax pffi-define-callback
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(syntax-rules ()
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((pffi-define-callback scheme-name return-type argument-types procedure)
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(define scheme-name (function-ptr procedure
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(_cprocedure
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(mlist->list (map pffi-type->native-type argument-types))
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(pffi-type->native-type return-type)))))))
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(define size-of-type
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(lambda (type)
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(let ((native-type (pffi-type->native-type type)))
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(if native-type
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(ctype-sizeof native-type)
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#f))))
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#;(define pffi-pointer-allocate
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(lambda (size)
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(malloc 'raw size)))
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(define pffi-pointer-address
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(lambda (pointer)
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pointer))
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(define pffi-pointer-null
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(lambda ()
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#f )) ; #f is the null pointer on racket
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#;(define pffi-string->pointer
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(lambda (string-content)
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(let* ((size (string-length string-content))
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(pointer (pffi-pointer-allocate (+ size 1))))
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(memmove pointer (cast (string-append string-content "") _string _pointer) (+ size 1))
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pointer)))
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#;(define pffi-pointer->string
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(lambda (pointer)
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(when (pffi-pointer-null? pointer)
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(error "Can not make string from null pointer" pointer))
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(string-copy (cast pointer _pointer _string))))
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(define pffi-shared-object-load
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(lambda (path options)
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(if (and (not (null? options))
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(assoc 'additional-versions options))
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(ffi-lib path (mlist->list (append (cadr (assoc 'additional-versions
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options))
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(list #f))))
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(ffi-lib path))))
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#;(define pffi-pointer-free
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(lambda (pointer)
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(free pointer)))
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(define pffi-pointer-null?
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(lambda (pointer)
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(not pointer))) ; #f is the null pointer on racket
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(define pffi-pointer-set!
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(lambda (pointer type offset value)
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(ptr-set! pointer
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(pffi-type->native-type type)
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'abs
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offset
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(if (equal? type 'char)
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(char->integer value)
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value))))
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(define pffi-pointer-get
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(lambda (pointer type offset)
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(let ((r (ptr-ref pointer
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(pffi-type->native-type type)
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'abs
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offset)))
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(if (equal? type 'char)
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(integer->char r)
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r))))
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(define pffi-struct-dereference
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(lambda (struct)
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(pffi-struct-pointer struct)))
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