176 lines
7.8 KiB
Scheme
176 lines
7.8 KiB
Scheme
(define-library
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(retropikzel r7rs-pffi version sagittarius)
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(import (scheme base)
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(scheme write)
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(scheme file)
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(scheme process-context)
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(sagittarius ffi)
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(sagittarius))
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(export pffi-shared-object-load
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pffi-define
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pffi-define-callback
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pffi-size-of
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pffi-pointer-allocate
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pffi-pointer-null
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pffi-string->pointer
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pffi-pointer->string
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pffi-pointer-free
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pffi-pointer?
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pffi-pointer-null?
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pffi-pointer-set!
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pffi-pointer-get
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pffi-pointer-deref)
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(begin
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(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) 'char*)
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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? (lambda (object) (pointer? 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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((pffi-define-callback 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 'string) size-of-void*)
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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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(integer->pointer 0)))
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(define pffi-string->pointer
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(lambda (string-content)
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string-content))
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(define pffi-pointer->string
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(lambda (pointer)
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(if (string? pointer)
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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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(let ((p pointer))
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(cond ((equal? type 'int8) (pointer-set-c-int8_t! p offset value))
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((equal? type 'uint8) (pointer-set-c-uint8_t! p offset value))
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((equal? type 'int16) (pointer-set-c-int16_t! p offset value))
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((equal? type 'uint16) (pointer-set-c-uint16_t! p offset value))
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((equal? type 'int32) (pointer-set-c-int32_t! p offset value))
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((equal? type 'uint32) (pointer-set-c-uint32_t! p offset value))
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((equal? type 'int64) (pointer-set-c-int64_t! p offset value))
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((equal? type 'uint64) (pointer-set-c-uint64_t! p offset value))
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((equal? type 'char) (pointer-set-c-char! p offset value))
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((equal? type 'short) (pointer-set-c-short! p offset value))
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((equal? type 'unsigned-short) (pointer-set-c-unsigned-short! p offset value))
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((equal? type 'int) (pointer-set-c-int! p offset value))
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((equal? type 'unsigned-int) (pointer-set-c-unsigned-int! p offset value))
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((equal? type 'long) (pointer-set-c-long! p offset value))
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((equal? type 'unsigned-long) (pointer-set-c-unsigned-long! p offset value))
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((equal? type 'float) (pointer-set-c-float! p offset value))
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((equal? type 'double) (pointer-set-c-double! p offset value))
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((equal? type 'void*) (pointer-set-c-pointer! p offset value))
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((equal? type 'pointer) (pointer-set-c-pointer! p offset value))))))
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(define pffi-pointer-get
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(lambda (pointer type offset)
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(let ((p pointer)
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(native-type (pffi-type->native-type type)))
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(cond ((equal? native-type 'int8_t) (pointer-ref-c-int8_t p offset))
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((equal? native-type 'uint8_t) (pointer-ref-c-uint8_t p offset))
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((equal? native-type 'int16_t) (pointer-ref-c-int16_t p offset))
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((equal? native-type 'uint16_t) (pointer-ref-c-uint16_t p offset))
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((equal? native-type 'int32_t) (pointer-ref-c-int32_t p offset))
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((equal? native-type 'uint32_t) (pointer-ref-c-uint32_t p offset))
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((equal? native-type 'int64_t) (pointer-ref-c-int64_t p offset))
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((equal? native-type 'uint64_t) (pointer-ref-c-uint64_t p offset))
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((equal? native-type 'char) (pointer-ref-c-char p offset))
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((equal? native-type 'short) (pointer-set-c-short p offset value))
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((equal? native-type 'unsigned-short) (pointer-ref-c-unsigned-short p offset))
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((equal? native-type 'int) (pointer-ref-c-int p offset))
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((equal? native-type 'unsigned-int) (pointer-ref-c-unsigned-int p offset))
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((equal? native-type 'long) (pointer-ref-c-long p offset))
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((equal? native-type 'unsigned-long) (pointer-ref-c-unsigned-long p offset))
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((equal? native-type 'float) (pointer-ref-c-float p offset))
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((equal? native-type 'double) (pointer-ref-c-double p offset))
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((equal? native-type 'void*) (pointer-ref-c-pointer p offset))
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((equal? native-type 'char*) (pffi-pointer->string (pointer-ref-c-pointer p offset)))
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))))
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(define pffi-pointer-deref
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(lambda (pointer)
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(deref pointer 0)))))
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