/[cffi-objects]/array.lisp
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Revision 13 - (show annotations)
Sat Dec 22 19:24:45 2012 UTC (15 months, 4 weeks ago) by rklochkov
File size: 2521 byte(s)
Fixed array. Removed redefinition of cffi:mem-ref
1 ;;;
2 ;;; array.lisp --- array
3 ;;;
4 ;;; Copyright (C) 2012, Roman Klochkov <monk@slavsoft.surgut.ru>
5 ;;;
6
7 (in-package #:cffi-objects)
8
9 (defvar *array-length* (foreign-alloc :uint))
10
11 ;; TODO: add with-pointer-to-vector-data optimization
12 (define-foreign-type cffi-array (freeable)
13 ((element-type :initarg :type :accessor element-type))
14 (:actual-type :pointer))
15
16 (define-parse-method carray (type &rest rest)
17 (apply #'make-instance 'cffi-array :type type rest))
18
19 (defmethod translate-to-foreign (value (cffi-array cffi-array))
20 (if (pointerp value)
21 value
22 (let* ((length (length value))
23 (type (element-type cffi-array))
24 (res (foreign-alloc type :count length)))
25 (if (struct-p type)
26 (dotimes (i length (values res t))
27 (clos->struct (second type) (elt value i) (mem-aptr res type i)))
28 (dotimes (i length (values res t))
29 (setf (mem-aref res type i) (elt value i)))))))
30
31 (defmethod translate-from-foreign (ptr (cffi-array cffi-array))
32 (let ((array-length (mem-ref *array-length* :uint)))
33 (let* ((res (make-array array-length))
34 (type (element-type cffi-array)))
35 (if (struct-p type)
36 (dotimes (i array-length res)
37 (setf (aref res i) (convert-from-foreign (mem-aptr ptr type i)
38 type)))
39 (dotimes (i array-length res)
40 (setf (aref res i) (mem-aref ptr type i)))))))
41
42 (define-foreign-type cffi-null-array (freeable)
43 ((element-type :initarg :type :accessor element-type))
44 (:actual-type :pointer))
45
46 (define-parse-method null-array (type &rest rest)
47 (apply #'make-instance 'cffi-null-array :type type rest))
48
49 (defmethod translate-to-foreign (value (cffi-null-array cffi-null-array))
50 (if (pointerp value)
51 value
52 (let* ((length (length value))
53 (type (element-type cffi-null-array))
54 (res (foreign-alloc type :count (+ 1 length))))
55 (dotimes (i length (values res t))
56 (setf (mem-aref res type i) (elt value i)))
57 (setf (mem-aref res :pointer length) (null-pointer))
58 res)))
59
60 (defmethod translate-from-foreign (ptr (cffi-null-array cffi-null-array))
61 (let* ((res nil)
62 (el-type (element-type cffi-null-array)))
63 (do ((i 0 (+ i 1))) ((null-pointer-p (mem-aref ptr :pointer i)))
64 (push (mem-aref ptr el-type i) res))
65 (coerce (nreverse res) 'array)))
66
67 (defctype string-array (null-array :string) "Zero-terminated string array")
68

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