(define-library (retropikzel pffi v0-1-0 sagittarius) (import (scheme base) (scheme write) (scheme file) (scheme process-context) (sagittarius ffi) (sagittarius)) (export pffi-shared-object-load pffi-define pffi-size-of pffi-pointer-allocate pffi-pointer-null pffi-string->pointer pffi-pointer->string pffi-pointer->bytevector pffi-pointer-free pffi-pointer? pffi-pointer-null? pffi-pointer-set! pffi-pointer-get pffi-pointer-deref) (begin (define pffi-type->native-type (lambda (type) (cond ((equal? type 'int8) 'int8_t) ((equal? type 'uint8) 'uint8_t) ((equal? type 'int16) 'int16_t) ((equal? type 'uint16) 'uint16_t) ((equal? type 'int32) 'int32_t) ((equal? type 'uint32) 'uint32_t) ((equal? type 'int64) 'int64_t) ((equal? type 'uint64) 'uint64_t) ((equal? type 'intptr) 'intptr_t) ((equal? type 'uintptr) 'uintptr_t) ((equal? type 'char) 'char) ((equal? type 'unsigned-char) 'char) ((equal? type 'short) 'short) ((equal? type 'unsigned-short) 'unsigned-short) ((equal? type 'int) 'int) ((equal? type 'unsigned-int) 'unsigned-int) ((equal? type 'long) 'long) ((equal? type 'unsigned-long) 'unsigned-long) ((equal? type 'float) 'float) ((equal? type 'double) 'double) ((equal? type 'pointer) 'void*) ((equal? type 'string) 'void*) ((equal? type 'void) 'void) (else (error "pffi-type->native-type -- No such pffi type" type))))) (define pffi-pointer? (lambda (object) (pointer? object))) (define-syntax pffi-define (syntax-rules () ((pffi-define scheme-name shared-object c-name return-type argument-types) (define scheme-name (make-c-function shared-object (pffi-type->native-type return-type) c-name (map pffi-type->native-type argument-types)))))) (define pffi-size-of (lambda (type) (cond ((eq? type 'int8) size-of-int8_t) ((eq? type 'uint8) size-of-uint8_t) ((eq? type 'int16) size-of-int16_t) ((eq? type 'uint16) size-of-uint16_t) ((eq? type 'int32) size-of-int32_t) ((eq? type 'uint32) size-of-uint32_t) ((eq? type 'int64) size-of-int64_t) ((eq? type 'uint64) size-of-uint64_t) ((eq? type 'char) size-of-char) ((eq? type 'unsigned-char) size-of-char) ((eq? type 'short) size-of-short) ((eq? type 'unsigned-short) size-of-unsigned-short) ((eq? type 'int) size-of-int) ((eq? type 'unsigned-int) size-of-unsigned-int) ((eq? type 'long) size-of-long) ((eq? type 'unsigned-long) size-of-unsigned-long) ((eq? type 'float) size-of-float) ((eq? type 'double) size-of-double) ((eq? type 'string) size-of-void*) ((eq? type 'pointer) size-of-void*) (else (error "Can not get size of unknown type" type))))) (define pffi-pointer-allocate (lambda (size) (allocate-pointer size))) (define pffi-pointer-null (lambda () (integer->pointer 0))) (define pffi-string->pointer (lambda (string-content) (bytevector->pointer (string->utf8 (string-copy string-content))))) (define pffi-pointer->string (lambda (pointer) (pointer->string pointer))) (define pffi-pointer->bytevector (lambda (pointer size) (pointer->bytevector pointer size))) (define pffi-shared-object-load (lambda (header path) (open-shared-library path))) (define pffi-pointer-free (lambda (pointer) (c-free pointer))) (define pffi-pointer-null? (lambda (pointer) (null-pointer? pointer))) (define pffi-pointer-set! (lambda (pointer type offset value) (let ((p pointer)) (cond ((equal? type 'int8) (pointer-set-c-int8_t! p offset value)) ((equal? type 'uint8) (pointer-set-c-uint8_t! p offset value)) ((equal? type 'int16) (pointer-set-c-int16_t! p offset value)) ((equal? type 'uint16) (pointer-set-c-uint16_t! p offset value)) ((equal? type 'int32) (pointer-set-c-int32_t! p offset value)) ((equal? type 'uint32) (pointer-set-c-uint32_t! p offset value)) ((equal? type 'int64) (pointer-set-c-int64_t! p offset value)) ((equal? type 'uint64) (pointer-set-c-uint64_t! p offset value)) ((equal? type 'intptr) (pointer-set-c-intptr_t! p offset value)) ((equal? type 'uintptr) (pointer-set-c-uintptr_t! p offset value)) ((equal? type 'char) (pointer-set-c-char! p offset value)) ((equal? type 'short) (pointer-set-c-short! p offset value)) ((equal? type 'unsigned-short) (pointer-set-c-unsigned-short! p offset value)) ((equal? type 'int) (pointer-set-c-int! p offset value)) ((equal? type 'unsigned-int) (pointer-set-c-unsigned-int! p offset value)) ((equal? type 'long) (pointer-set-c-long! p offset value)) ((equal? type 'unsigned-long) (pointer-set-c-unsigned-long! p offset value)) ((equal? type 'float) (pointer-set-c-float! p offset value)) ((equal? type 'double) (pointer-set-c-double! p offset value)) ((equal? type 'void) (pointer-set-c-void*! p offset value)))))) (define pffi-pointer-get (lambda (pointer type offset) (let ((p pointer) (native-type (pffi-type->native-type type))) (cond ((equal? native-type 'int8_t) (pointer-ref-c-int8_t p offset)) ((equal? native-type 'uint8_t) (pointer-ref-c-uint8_t p offset)) ((equal? native-type 'int16_t) (pointer-ref-c-int16_t p offset)) ((equal? native-type 'uint16_t) (pointer-ref-c-uint16_t p offset)) ((equal? native-type 'int32_t) (pointer-ref-c-int32_t p offset)) ((equal? native-type 'uint32_t) (pointer-ref-c-uint32_t p offset)) ((equal? native-type 'int64_t) (pointer-ref-c-int64_t p offset)) ((equal? native-type 'uint64_t) (pointer-ref-c-uint64_t p offset)) ((equal? native-type 'intptr_t) (pointer-ref-c-intptr_t p offset)) ((equal? native-type 'uintptr_t) (pointer-ref-c-uintptr_t p offset)) ((equal? native-type 'char) (pointer-ref-c-char p offset)) ((equal? native-type 'short) (pointer-set-c-short p offset value)) ((equal? native-type 'unsigned-short) (pointer-ref-c-unsigned-short p offset)) ((equal? native-type 'int) (pointer-ref-c-int p offset)) ((equal? native-type 'unsigned-int) (pointer-ref-c-unsigned-int p offset)) ((equal? native-type 'long) (pointer-ref-c-long p offset)) ((equal? native-type 'unsigned-long) (pointer-ref-c-unsigned-long p offset)) ((equal? native-type 'float) (pointer-ref-c-float p offset)) ((equal? native-type 'double) (pointer-ref-c-double p offset)) ((equal? native-type 'void*) (pointer-ref-c-void* p offset)))))) (define pffi-pointer-deref (lambda (pointer) (deref pointer 0)))))