183 lines
8.4 KiB
Scheme
183 lines
8.4 KiB
Scheme
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(define type->native-type ; Chicken has this procedure in three places
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(lambda (type)
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(cond ((equal? type 'int8) 'byte)
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((equal? type 'uint8) 'unsigned-byte)
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((equal? type 'int16) 'short)
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((equal? type 'uint16) 'unsigned-short)
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((equal? type 'int32) 'integer32)
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((equal? type 'uint32) 'unsigned-integer32)
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((equal? type 'int64) 'integer64)
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((equal? type 'uint64) 'unsigned-integer64)
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((equal? type 'char) 'char)
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((equal? type 'unsigned-char) 'unsigned-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) 'c-pointer)
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((equal? type 'void) 'void)
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((equal? type 'callback) 'c-pointer)
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((equal? type 'struct) 'c-pointer)
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(else (error "type->native-type -- No such pffi type" type)))))
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(define c-bytevector?
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(lambda (object)
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(pointer? object)))
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(define-syntax define-c-procedure
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(er-macro-transformer
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(lambda (expr rename compare)
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(let* ((type->native-type ; Chicken has this procedure in three places
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(lambda (type)
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(cond ((equal? type 'int8) 'byte)
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((equal? type 'uint8) 'unsigned-byte)
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((equal? type 'int16) 'short)
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((equal? type 'uint16) 'unsigned-short)
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((equal? type 'int32) 'integer32)
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((equal? type 'uint32) 'unsigned-integer32)
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((equal? type 'int64) 'integer64)
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((equal? type 'uint64) 'unsigned-integer64)
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((equal? type 'char) 'char)
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((equal? type 'unsigned-char) 'unsigned-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) 'c-pointer)
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((equal? type 'void) 'void)
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((equal? type 'callback) 'c-pointer)
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((equal? type 'struct) 'c-pointer)
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(else (error "type->native-type -- No such pffi type" type)))))
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(scheme-name (list-ref expr 1))
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(c-name (symbol->string (cadr (list-ref expr 3))))
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(return-type (type->native-type (cadr (list-ref expr 4))))
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(argument-types (if (null? (cdr (list-ref expr 5)))
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(list)
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(map type->native-type
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(cadr (list-ref expr 5))))))
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(if (null? argument-types)
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`(define ,scheme-name
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(foreign-safe-lambda ,return-type ,c-name))
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`(define ,scheme-name
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(foreign-safe-lambda ,return-type ,c-name ,@ argument-types)))))))
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(define-syntax define-c-callback
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(er-macro-transformer
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(lambda (expr rename compare)
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(let* ((type->native-type ; Chicken has this procedure in three places
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(lambda (type)
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(cond ((equal? type 'int8) 'byte)
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((equal? type 'uint8) 'unsigned-byte)
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((equal? type 'int16) 'short)
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((equal? type 'uint16) 'unsigned-short)
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((equal? type 'int32) 'integer32)
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((equal? type 'uint32) 'unsigned-integer32)
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((equal? type 'int64) 'integer64)
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((equal? type 'uint64) 'unsigned-integer64)
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((equal? type 'char) 'char)
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((equal? type 'unsigned-char) 'unsigned-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) 'c-pointer)
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((equal? type 'void) 'void)
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((equal? type 'callback) 'c-pointer)
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((equal? type 'struct) 'c-pointer)
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(else (error "type->native-type -- No such pffi type" type)))))
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(scheme-name (list-ref expr 1))
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(return-type (type->native-type (cadr (list-ref expr 2))))
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(argument-types (map type->native-type (cadr (list-ref expr 3))))
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(argument-names (cadr (list-ref expr 4)))
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(arguments (map
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(lambda (name type)
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`(,name ,type))
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argument-types argument-names))
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(procedure-body (cdr (cdr (list-ref expr 4)))))
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`(begin (define-external ,(cons 'external_123456789 arguments)
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,return-type
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(begin ,@ procedure-body))
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(define ,scheme-name (location external_123456789)))))))
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(define size-of-type
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(lambda (type)
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(cond ((equal? type 'int8) (foreign-value "sizeof(int8_t)" int))
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((equal? type 'uint8) (foreign-value "sizeof(uint8_t)" int))
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((equal? type 'int16) (foreign-value "sizeof(int16_t)" int))
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((equal? type 'uint16) (foreign-value "sizeof(uint16_t)" int))
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((equal? type 'int32) (foreign-value "sizeof(int32_t)" int))
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((equal? type 'uint32) (foreign-value "sizeof(uint32_t)" int))
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((equal? type 'int64) (foreign-value "sizeof(int64_t)" int))
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((equal? type 'uint64) (foreign-value "sizeof(uint64_t)" int))
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((equal? type 'char) (foreign-value "sizeof(char)" int))
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((equal? type 'unsigned-char) (foreign-value "sizeof(unsigned char)" int))
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((equal? type 'short) (foreign-value "sizeof(short)" int))
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((equal? type 'unsigned-short) (foreign-value "sizeof(unsigned short)" int))
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((equal? type 'int) (foreign-value "sizeof(int)" int))
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((equal? type 'unsigned-int) (foreign-value "sizeof(unsigned int)" int))
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((equal? type 'long) (foreign-value "sizeof(long)" int))
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((equal? type 'unsigned-long) (foreign-value "sizeof(unsigned long)" int))
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((equal? type 'float) (foreign-value "sizeof(float)" int))
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((equal? type 'double) (foreign-value "sizeof(double)" int))
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((equal? type 'pointer) (foreign-value "sizeof(void*)" int))
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((equal? type 'string) (foreign-value "sizeof(void*)" int))
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((equal? type 'callback) (foreign-value "sizeof(void*)" int)))))
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(define make-c-null
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(lambda ()
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(address->pointer 0)))
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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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(begin
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(define scheme-name #t)
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(shared-object-load headers)))))
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(define-syntax shared-object-load
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(er-macro-transformer
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(lambda (expr rename compare)
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(let* ((headers (cadr (car (cdr expr)))))
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`(begin
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,@ (map
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(lambda (header)
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`(foreign-declare ,(string-append "#include <" header ">")))
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headers))))))
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(define c-null?
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(lambda (pointer)
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(if (and (not (pointer? pointer))
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pointer)
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#f
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(or (not pointer) ; #f counts as null pointer on Chicken
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(= (pointer->address pointer) 0)))))
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(define c-bytevector-u8-ref
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(lambda (c-bytevector k)
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(pointer-u8-ref (pointer+ c-bytevector k))))
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(define c-bytevector-u8-set!
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(lambda (c-bytevector k byte)
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(pointer-u8-set! (pointer+ c-bytevector k) byte)))
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(define c-bytevector-pointer-ref
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(lambda (c-bytevector k)
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(address->pointer (pointer-u64-ref (pointer+ c-bytevector k)))))
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(define c-bytevector-pointer-set!
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(lambda (c-bytevector k pointer)
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(pointer-u64-set! (pointer+ c-bytevector k) (pointer->address pointer))))
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