112 lines
3.7 KiB
Scheme
112 lines
3.7 KiB
Scheme
(define-library
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(foreign c ikarus-primitives)
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(export size-of-type
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align-of-type
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shared-object-load
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define-c-procedure
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c-bytevector?
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c-bytevector-u8-ref
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c-bytevector-u8-set!
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c-bytevector-pointer-ref
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c-bytevector-pointer-set!)
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(import (rnrs base)
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(rnrs lists)
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(rnrs control)
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(rnrs files)
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(rnrs io simple)
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(rnrs programs)
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(only (rnrs bytevectors)
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make-bytevector
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bytevector-length
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utf8->string
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string->utf8
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bytevector-u8-ref
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bytevector-u8-set!)
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(only (rnrs r5rs)
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remainder
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quotient)
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(ikarus include)
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(ikarus foreign))
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(begin
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(define size-of-type
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(lambda (type)
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(cond ((eq? type 'int8) 1)
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((eq? type 'uint8) 1)
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((eq? type 'int16) 2)
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((eq? type 'uint16) 2)
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((eq? type 'int32) 4)
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((eq? type 'uint32) 4)
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((eq? type 'int64) 8)
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((eq? type 'uint64) 8)
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((eq? type 'char) 1)
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((eq? type 'unsigned-char) 1)
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((eq? type 'short) 2)
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((eq? type 'unsigned-short) 2)
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((eq? type 'int) 4)
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((eq? type 'unsigned-int) 4)
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((eq? type 'long) 8)
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((eq? type 'unsigned-long) 8)
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((eq? type 'float) 4)
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((eq? type 'double) 8)
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((eq? type 'pointer) 8)
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((eq? type 'void) 0)
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(else #f))))
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;; FIXME
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(define align-of-type size-of-type)
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(define (type->native-type type)
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(cond ((equal? type 'int8) 'signed-char)
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((equal? type 'uint8) 'unsigned-char)
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((equal? type 'int16) 'signed-short)
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((equal? type 'uint16) 'unsigned-short)
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((equal? type 'int32) 'signed-int)
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((equal? type 'uint32) 'unsigned-int)
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((equal? type 'int64) 'signed-long)
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((equal? type 'uint64) 'unsigned-long)
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((equal? type 'char) 'signed-char)
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((equal? type 'unsigned-char) 'unsigned-char)
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((equal? type 'short) 'signed-short)
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((equal? type 'unsigned-short) 'unsigned-short)
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((equal? type 'int) 'signed-int)
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((equal? type 'unsigned-int) 'unsigned-int)
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((equal? type 'long) 'signed-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) 'pointer)
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((equal? type 'void) 'void)
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(error "Unsupported 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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(syntax-rules ()
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((_ scheme-name shared-object c-name return-type argument-types)
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(define scheme-name
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((make-c-callout (type->native-type return-type)
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(map type->native-type argument-types))
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(dlsym shared-object (symbol->string c-name)))))))
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(define shared-object-load
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(lambda (path options)
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(dlopen path)))
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(define c-bytevector-u8-set!
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(lambda (c-bytevector k byte)
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(pointer-set-c-char! c-bytevector k byte)))
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(define c-bytevector-u8-ref
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(lambda (c-bytevector k)
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(pointer-ref-c-unsigned-char 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-set-c-pointer! c-bytevector k pointer)))
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(define c-bytevector-pointer-ref
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(lambda (c-bytevector k)
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(pointer-ref-c-pointer c-bytevector k)))))
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