(define-module (irrlicht util)
#:use-module (system foreign)
- #:use-module (srfi srfi-9)
- #:use-module (srfi srfi-9 gnu)
+ #:use-module (srfi srfi-1)
+ #:use-module (rnrs bytevectors)
#:export (bool->integer
integer->bool
define-foreign
- define-foreign-record-type))
+ define-foreign-record-type
+ foreign-record->pointer))
(define (bool->integer var)
(if var 1 0))
(irrlicht-func return-type func-name arg-types)))
;; foreign struct record type
-(define-record-type standard-foreign-record-type
- (make-foreign-record-type name types fields)
- foreign-record-type?
- (name foreign-record-type-name)
- (types foreign-record-type-types)
- (fields foreign-record-type-fields))
-
-(define-record-type foreign-record
- (make-foreign-record type pointer)
- foreign-record?
- (type foreign-record-type)
- (pointer foreign-record-pointer set-foreign-record-pointer!))
-
-(set-record-type-printer! foreign-record
- (lambda (record port)
- (format port "#<~a" (foreign-record-type-name (foreign-record-type record)))
- (let* ((pointer (foreign-record-pointer record))
- (record-type (foreign-record-type record))
- (types (foreign-record-type-types record-type))
- (fields (foreign-record-type-fields record-type))
- (values (parse-c-struct pointer types)))
- (for-each (lambda (field value)
- (format port " ~a: ~a" field value))
- fields
- values))
- (format port ">")))
-
(define-syntax define-foreign-record-type
(lambda (x)
(define (field-names field-specs)
((name type getter) #'name)
((name type getter setter) #'name)))
field-specs))
+
(define (field-types field-specs)
(map (lambda (field-spec)
(syntax-case field-spec ()
((name type getter) #'type)
((name type getter setter) #'type)))
field-specs))
+
+ (define (field-getters field-specs)
+ (map (lambda (field-spec field-id)
+ (syntax-case field-spec ()
+ ((name type getter) (list #'getter field-id))
+ ((name type getter setter) (list #'getter field-id))))
+ field-specs
+ (iota (length field-specs))))
+
+ (define (field-setters field-specs)
+ (filter-map (lambda (field-spec field-id)
+ (syntax-case field-spec ()
+ ((name type getter) #f)
+ ((name type getter setter) (list #'setter field-id))))
+ field-specs
+ (iota (length field-specs))))
+
(syntax-case x ()
((_ name (make-name make-arg ...) predicate? field-spec ...)
(with-syntax (((type-id ...) (field-types #'(field-spec ...)))
- ((field-name ...) (field-names #'(field-spec ...))))
+ ((field-name ...) (field-names #'(field-spec ...)))
+ (((getter getter-id) ...) (field-getters #'(field-spec ...)))
+ (((setter setter-id) ...) (field-setters #'(field-spec ...))))
#'(begin
- (define name
- (make-foreign-record-type
- 'name
- (list type-id ...)
- (list 'field-name ...)))
+ (define-wrapped-pointer-type name
+ predicate?
+ wrap-record unwrap-record
+ (lambda (record port)
+ (format port "#<~a" 'name)
+ (let ((values (parse-c-struct (unwrap-record record) (list type-id ...))))
+ (for-each (lambda (field value)
+ (format port " ~a: ~a" field value))
+ '(field-name ...)
+ values))
+ (format port ">")))
+
(define (make-name make-arg ...)
- (let* ((types (foreign-record-type-types name))
- (c-struct-pointer (make-c-struct types (list make-arg ...))))
- (make-foreign-record name c-struct-pointer)))
- (define (predicate? record)
- (and
- (foreign-record? record)
- (let* ((record-type (foreign-record-type record))
- (type-name (foreign-record-type-name record-type)))
- (equal? type-name (foreign-record-type-name name)))))
- (export name)
- (export make-name)
- (export predicate?)))))))
+ (wrap-record (make-c-struct (list type-id ...) (list make-arg ...))))
+
+ (define (getter record)
+ (let ((values (parse-c-struct (unwrap-record record) (list type-id ...))))
+ (list-ref values getter-id)))
+ ...
+
+ (define (setter record new-value)
+ (let* ((types (list type-id ...))
+ (type (list-ref types setter-id))
+ (len (sizeof type))
+ (offset (if (> setter-id 0)
+ (sizeof (list-head types setter-id))
+ 0))
+ (bv (pointer->bytevector (unwrap-record record) len offset 'u32)))
+ (bytevector-set! bv new-value type)
+ new-value))
+ ...))))))
+
+(define (bytevector-set! bv value type)
+ (let ((procedure
+ (cond
+ ((= type int8) bytevector-s8-set!)
+ ((= type int16) bytevector-s16-native-set!)
+ ((= type int32) bytevector-s32-native-set!)
+ ((= type int64) bytevector-s64-native-set!)
+ ((= type uint8) bytevector-u8-set!)
+ ((= type uint16) bytevector-u16-native-set!)
+ ((= type uint32) bytevector-u32-native-set!)
+ ((= type uint64) bytevector-u64-native-set!)
+ ((= type float) bytevector-ieee-single-native-set!)
+ ((= type double) bytevector-ieee-double-native-set!)
+ (else #f))))
+ (if procedure
+ (apply procedure bv 0 value '()))))
+
+(define (foreign-record->pointer record)
+ (struct-ref record 0))