(define-module (irrlicht util)
- #:use-module (system foreign)
- #:use-module (srfi srfi-1)
- #:use-module (rnrs bytevectors)
#:export (bool->integer
- integer->bool
- define-foreign
- define-foreign-record-type
- foreign-record->pointer))
+ integer->bool))
(define (bool->integer var)
(if var 1 0))
(define (integer->bool var)
(if (= var 0) #f #t))
-
-;; Based on guile-sdl2 function, thanks a lot
-(define irrlicht-func
- (let ((cirr (dynamic-link "libCIrrlicht")))
- (lambda (return-type function-name arg-types)
- (pointer->procedure return-type
- (dynamic-func function-name cirr)
- arg-types))))
-
-(define-syntax-rule (define-foreign name return-type func-name arg-types)
- (define-public name
- (irrlicht-func return-type func-name arg-types)))
-
-;; foreign struct record type
-(define-syntax define-foreign-record-type
- (lambda (x)
- (define (field-names field-specs)
- (map (lambda (field-spec)
- (syntax-case field-spec ()
- ((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 ...)))
- (((getter getter-id) ...) (field-getters #'(field-spec ...)))
- (((setter setter-id) ...) (field-setters #'(field-spec ...))))
- #'(begin
- (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 ...)
- (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))