158 lines
6.9 KiB
Scheme
158 lines
6.9 KiB
Scheme
(define pffi-type->native-type
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(lambda (type)
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(cond ((equal? type 'int8) 'int8_t)
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((equal? type 'uint8) 'uint8_t)
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((equal? type 'int16) 'int16_t)
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((equal? type 'uint16) 'uint16_t)
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((equal? type 'int32) 'int32_t)
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((equal? type 'uint32) 'uint32_t)
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((equal? type 'int64) 'int64_t)
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((equal? type 'uint64) 'uint64_t)
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((equal? type 'char) 'char)
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((equal? type 'unsigned-char) 'char)
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((equal? type 'short) 'short)
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((equal? type 'unsigned-short) 'unsigned-short)
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((equal? type 'int) 'int)
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((equal? type 'unsigned-int) 'unsigned-int)
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((equal? type 'long) 'long)
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((equal? type 'unsigned-long) 'unsigned-long)
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((equal? type 'float) 'float)
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((equal? type 'double) 'double)
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((equal? type 'pointer) 'void*)
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((equal? type 'string) 'string)
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((equal? type 'void) 'void)
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((equal? type 'callback) 'callback)
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(else (error "pffi-type->native-type -- No such pffi type" type)))))
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(define pffi-pointer?
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(lambda (object)
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(or (pointer? object)
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(string? 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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(make-c-function shared-object
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(pffi-type->native-type return-type)
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c-name
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(map pffi-type->native-type argument-types))))))
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(define-syntax pffi-define-callback
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(syntax-rules ()
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((_ scheme-name return-type argument-types procedure)
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(define scheme-name
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(make-c-callback (pffi-type->native-type return-type)
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(map pffi-type->native-type argument-types)
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procedure)))))
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(define pffi-size-of
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(lambda (type)
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(cond ((eq? type 'int8) size-of-int8_t)
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((eq? type 'uint8) size-of-uint8_t)
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((eq? type 'int16) size-of-int16_t)
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((eq? type 'uint16) size-of-uint16_t)
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((eq? type 'int32) size-of-int32_t)
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((eq? type 'uint32) size-of-uint32_t)
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((eq? type 'int64) size-of-int64_t)
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((eq? type 'uint64) size-of-uint64_t)
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((eq? type 'char) size-of-char)
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((eq? type 'unsigned-char) size-of-char)
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((eq? type 'short) size-of-short)
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((eq? type 'unsigned-short) size-of-unsigned-short)
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((eq? type 'int) size-of-int)
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((eq? type 'unsigned-int) size-of-unsigned-int)
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((eq? type 'long) size-of-long)
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((eq? type 'unsigned-long) size-of-unsigned-long)
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((eq? type 'float) size-of-float)
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((eq? type 'double) size-of-double)
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((eq? type 'pointer) size-of-void*)
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(else (error "Can not get size of unknown type" type)))))
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(define pffi-pointer-allocate
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(lambda (size)
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(c-malloc size)))
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(define pffi-pointer-null
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(lambda ()
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(empty-pointer)))
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(define pffi-string->pointer
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(lambda (string-content)
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(letrec* ((bytes (string->utf8 string-content))
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(bytes-length (bytevector-length bytes))
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(pointer-length (+ bytes-length 1))
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(pointer (pffi-pointer-allocate pointer-length))
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(looper
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(lambda (index)
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(when (< index bytes-length)
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(pointer-set-c-uint8_t! pointer index (bytevector-u8-ref bytes index))
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(looper (+ index 1))))))
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(looper 0)
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pointer)))
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(define pffi-pointer->string
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(lambda (pointer)
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(pointer->string pointer)))
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(define pffi-shared-object-load
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(lambda (header path)
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(open-shared-library path)))
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(define pffi-pointer-free
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(lambda (pointer)
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(when (pointer? pointer)
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(c-free pointer))))
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(define pffi-pointer-null?
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(lambda (pointer)
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(null-pointer? pointer)))
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(define pffi-pointer-set!
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(lambda (pointer type offset value)
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(cond ((equal? type 'int8) (pointer-set-c-int8_t! pointer offset value))
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((equal? type 'uint8) (pointer-set-c-uint8_t! pointer offset value))
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((equal? type 'int16) (pointer-set-c-int16_t! pointer offset value))
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((equal? type 'uint16) (pointer-set-c-uint16_t! pointer offset value))
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((equal? type 'int32) (pointer-set-c-int32_t! pointer offset value))
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((equal? type 'uint32) (pointer-set-c-uint32_t! pointer offset value))
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((equal? type 'int64) (pointer-set-c-int64_t! pointer offset value))
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((equal? type 'uint64) (pointer-set-c-uint64_t! pointer offset value))
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((equal? type 'char) (pointer-set-c-char! pointer offset (char->integer value)))
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((equal? type 'short) (pointer-set-c-short! pointer offset value))
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((equal? type 'unsigned-short) (pointer-set-c-unsigned-short! pointer offset value))
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((equal? type 'int) (pointer-set-c-int! pointer offset value))
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((equal? type 'unsigned-int) (pointer-set-c-unsigned-int! pointer offset value))
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((equal? type 'long) (pointer-set-c-long! pointer offset value))
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((equal? type 'unsigned-long) (pointer-set-c-unsigned-long! pointer offset value))
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((equal? type 'float) (pointer-set-c-float! pointer offset value))
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((equal? type 'double) (pointer-set-c-double! pointer offset value))
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((equal? type 'void) (pointer-set-c-pointer! pointer offset value))
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((equal? type 'pointer) (pointer-set-c-pointer! pointer offset value)))))
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(define pffi-pointer-get
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(lambda (pointer type offset)
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(cond ((equal? type 'int8) (pointer-ref-c-int8_t pointer offset))
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((equal? type 'uint8) (pointer-ref-c-uint8_t pointer offset))
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((equal? type 'int16) (pointer-ref-c-int16_t pointer offset))
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((equal? type 'uint16) (pointer-ref-c-uint16_t pointer offset))
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((equal? type 'int32) (pointer-ref-c-int32_t pointer offset))
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((equal? type 'uint32) (pointer-ref-c-uint32_t pointer offset))
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((equal? type 'int64) (pointer-ref-c-int64_t pointer offset))
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((equal? type 'uint64) (pointer-ref-c-uint64_t pointer offset))
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((equal? type 'char) (integer->char (pointer-ref-c-char pointer offset)))
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((equal? type 'short) (pointer-ref-c-short pointer offset))
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((equal? type 'unsigned-short) (pointer-ref-c-unsigned-short pointer offset))
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((equal? type 'int) (pointer-ref-c-int pointer offset))
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((equal? type 'unsigned-int) (pointer-ref-c-unsigned-int pointer offset))
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((equal? type 'long) (pointer-ref-c-long pointer offset))
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((equal? type 'unsigned-long) (pointer-ref-c-unsigned-long pointer offset))
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((equal? type 'float) (pointer-ref-c-float pointer offset))
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((equal? type 'double) (pointer-ref-c-double pointer offset))
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((equal? type 'void) (pointer-ref-c-pointer pointer offset))
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((equal? type 'pointer) (pointer-ref-c-pointer pointer offset)))))
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(define pffi-pointer-cast->struct
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(lambda (struct-name pointer)
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pointer))
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