212 lines
10 KiB
Scheme
212 lines
10 KiB
Scheme
(define-library
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(retropikzel pffi v0-2-0 chicken)
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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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(chicken foreign)
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(chicken syntax)
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(chicken memory))
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(export pffi-shared-object-load
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pffi-define
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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) 'byte)
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((equal? type 'uint8) 'unsigned-byte)
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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)
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((equal? type 'uint32) 'unsigned-int32)
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((equal? type 'int64) 'integer-64)
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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 'string) 'c-string)
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((equal? type 'void) 'void)
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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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(pointer? object)))
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(define-syntax pffi-define
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(er-macro-transformer
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(lambda (expr rename compare)
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(let* ((pffi-type->native-type
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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) 'int16_t)
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((equal? type 'uint16) 'uint16_t)
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((equal? type 'int32) 'int32)
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((equal? type 'uint32) 'unsigned-int32)
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((equal? type 'int64) 'integer-64)
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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 'string) 'c-string)
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((equal? type 'void) 'void)
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(else (error "pffi-type->native-type -- No such pffi type" type)))))
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(scheme-name (car (cdr expr)))
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(c-name (symbol->string (car (cdr (car (cdr (cdr (cdr expr))))))))
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(return-type (pffi-type->native-type (car (cdr (car (cdr (cdr (cdr (cdr expr)))))))))
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(argument-types
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(let ((types (cdr (car (cdr (cdr (cdr (cdr (cdr expr)))))))))
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(if (null? types)
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'()
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(map pffi-type->native-type (map car (map cdr types)))))))
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(if (null? argument-types)
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`(define ,scheme-name
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(foreign-lambda ,return-type ,c-name))
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`(define ,scheme-name
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(foreign-lambda ,return-type ,c-name ,@ argument-types)))))))
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(define-syntax pffi-size-of
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(er-macro-transformer
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(lambda (expr rename compare)
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(let ((type (car (cdr (car (cdr expr))))))
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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(int)" int))
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(else `(error "pffi-size-of -- No such pffi type" type)))))))
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(define pffi-pointer-allocate
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(lambda (size)
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(allocate size)))
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(define pffi-pointer-null
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(lambda ()
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(address->pointer 0)))
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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)))
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(move-memory! string-content pointer size 0)
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pointer)))
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(pffi-define strlen #f 'strlen 'int (list 'pointer))
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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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(let* ((size (strlen pointer))
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(string-content (make-string size)))
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(move-memory! pointer string-content size 0)
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string-content))))
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(define-syntax pffi-shared-object-load
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(er-macro-transformer
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(lambda (expr rename compare)
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(let* ((headers (cdr (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 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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(and (pffi-pointer? pointer)
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(= (pointer->address pointer) 0))))
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(define pffi-pointer-set!
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(lambda (pointer type offset value)
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(cond
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((equal? type 'int8) (pointer-s8-set! (pointer+ pointer offset) value))
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((equal? type 'uint8) (pointer-u8-set! (pointer+ pointer offset) value))
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((equal? type 'int16) (pointer-s16-set! (pointer+ pointer offset) value))
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((equal? type 'uint16) (pointer-u16-set! (pointer+ pointer offset) value))
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((equal? type 'int32) (pointer-s32-set! (pointer+ pointer offset) value))
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((equal? type 'uint32) (pointer-u32-set! (pointer+ pointer offset) value))
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((equal? type 'int64) (pointer-s64-set! (pointer+ pointer offset) value))
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((equal? type 'uint64) (pointer-u64-set! (pointer+ pointer offset) value))
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((equal? type 'char) (pointer-s8-set! (pointer+ pointer offset) value))
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((equal? type 'short) (pointer-s8-set! (pointer+ pointer offset) value))
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((equal? type 'unsigned-short) (pointer-u8-set! (pointer+ pointer offset) value))
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((equal? type 'int) (pointer-s32-set! (pointer+ pointer offset) value))
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((equal? type 'unsigned-int) (pointer-u32-set! (pointer+ pointer offset) value))
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((equal? type 'long) (pointer-s32-set! (pointer+ pointer offset) value))
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((equal? type 'unsigned-long) (pointer-u32-set! (pointer+ pointer offset) value))
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((equal? type 'float) (pointer-s32-set! (pointer+ pointer offset) value))
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((equal? type 'double) (pointer-s32-set! (pointer+ pointer offset) value))
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((equal? type 'pointer) (pointer-u32-set! (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
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((equal? type 'int8) (pointer-s8-ref (pointer+ pointer offset)))
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((equal? type 'uint8) (pointer-u8-ref (pointer+ pointer offset)))
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((equal? type 'int16) (pointer-s16-ref (pointer+ pointer offset)))
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((equal? type 'uint16) (pointer-u16-ref (pointer+ pointer offset)))
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((equal? type 'int32) (pointer-s32-ref (pointer+ pointer offset)))
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((equal? type 'uint32) (pointer-u32-ref (pointer+ pointer offset)))
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((equal? type 'int64) (pointer-s64-ref (pointer+ pointer offset)))
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((equal? type 'uint64) (pointer-u64-ref (pointer+ pointer offset)))
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((equal? type 'char) (pointer-s8-ref (pointer+ pointer offset)))
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((equal? type 'short) (pointer-s8-ref (pointer+ pointer offset)))
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((equal? type 'unsigned-short) (pointer-u8-ref (pointer+ pointer offset)))
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((equal? type 'int) (pointer-s32-ref (pointer+ pointer offset)))
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((equal? type 'unsigned-int) (pointer-u32-ref (pointer+ pointer offset)))
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((equal? type 'long) (pointer-s32-ref (pointer+ pointer offset)))
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((equal? type 'unsigned-long) (pointer-u32-ref (pointer+ pointer offset)))
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((equal? type 'float) (pointer-s32-ref (pointer+ pointer offset)))
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((equal? type 'double) (pointer-s32-ref (pointer+ pointer offset)))
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((equal? type 'pointer) (pointer-u32-ref (pointer+ pointer offset))))))
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(define pffi-pointer-deref
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(lambda (pointer)
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pointer))))
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