1 ;;;; FIXME: This file and host-c-call.lisp are separate from the
2 ;;;; rest of the alien source code for historical reasons: CMU CL
3 ;;;; made a distinction between the stuff in the C-CALL package and
4 ;;;; stuff in the ALIEN package. There's no obvious boundary
5 ;;;; there, though, and SBCL doesn't try to make this distinction,
6 ;;;; so it might make sense to just merge these files in with the
7 ;;;; rest of the SB-ALIEN code.
9 ;;;; This software is part of the SBCL system. See the README file for
10 ;;;; more information.
12 ;;;; This software is derived from the CMU CL system, which was
13 ;;;; written at Carnegie Mellon University and released into the
14 ;;;; public domain. The software is in the public domain and is
15 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
16 ;;;; files for more information.
18 (in-package "SB!ALIEN")
22 (define-alien-type char (integer 8))
23 (define-alien-type short (integer 16))
24 (define-alien-type int (integer 32))
25 (define-alien-type long (integer #.sb!vm::n-machine-word-bits))
26 (define-alien-type long-long (integer 64))
28 (define-alien-type unsigned-char (unsigned 8))
29 (define-alien-type unsigned-short (unsigned 16))
30 (define-alien-type unsigned-int (unsigned 32))
31 (define-alien-type unsigned-long (unsigned #.sb!vm::n-machine-word-bits))
32 (define-alien-type unsigned-long-long (unsigned 64))
34 (define-alien-type float single-float)
35 (define-alien-type double double-float)
37 (define-alien-type-translator void ()
38 (parse-alien-type '(values) (sb!kernel:make-null-lexenv)))
40 ;;; FIXME: %NATURALIZE-C-STRING (and the UTF8 siblings below) would
41 ;;; appear to be vulnerable to the lisp string moving from underneath
42 ;;; them if the world undergoes a GC, possibly triggered by another
45 ;;; Actually the above shouldn't happen; x86 and x86-64 use GENCGC,
46 ;;; so the string can't move by virtue of pointers to it from
47 ;;; outside the heap. Other platforms will access the lisp string
48 ;;; through the GC-safe interior pointer. -- JES, 2006-01-13
49 (defun %naturalize-c-string (sap)
50 (declare (type system-area-pointer sap))
52 (declare (optimize (speed 3) (safety 0)))
53 (let ((length (loop for offset of-type fixnum upfrom 0
54 until (zerop (sap-ref-8 sap offset))
55 finally (return offset))))
56 (let ((result (make-string length :element-type 'base-char)))
57 (sb!kernel:copy-ub8-from-system-area sap 0 result 0 length)
60 (defun %naturalize-utf8-string (sap)
61 (declare (type system-area-pointer sap))
63 (declare (optimize (speed 3) (safety 0)))
64 (let ((byte-length (do* ((offset 0 (1+ offset))
65 (byte #1=(sap-ref-8 sap offset) #1#))
66 ((zerop byte) offset))))
67 (handler-bind ((sb!impl::octet-decoding-error #'sb!impl::use-unicode-replacement-char))
68 (sb!impl::utf8->string-sap-ref-8 sap 0 byte-length)))))
70 (defun %deport-utf8-string (string)
71 (declare (type simple-string string))
72 (sb!impl::string->utf8 string 0 (length string) 1))