1.0.13.51: Fixups in mkstemp wrapper used in RUN-PROGRAM.
[sbcl/simd.git] / src / code / host-c-call.lisp
blob7d4c9d7eac5923ef438ac4eb7acc7193915a9942
1 ;;;; This software is part of the SBCL system. See the README file for
2 ;;;; more information.
3 ;;;;
4 ;;;; This software is derived from the CMU CL system, which was
5 ;;;; written at Carnegie Mellon University and released into the
6 ;;;; public domain. The software is in the public domain and is
7 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
8 ;;;; files for more information.
10 (in-package "SB!ALIEN")
12 (/show0 "host-c-call.lisp 12")
14 (define-alien-type-class (c-string :include pointer :include-args (to))
15 (external-format :default :type keyword)
16 (element-type 'character :type (member character base-char)))
18 (define-alien-type-translator c-string
19 (&key (external-format :default)
20 (element-type 'character))
21 (make-alien-c-string-type
22 :to (parse-alien-type 'char (sb!kernel:make-null-lexenv))
23 :element-type element-type
24 :external-format external-format))
26 (defun c-string-external-format (type)
27 (let ((external-format (alien-c-string-type-external-format type)))
28 (if (eq external-format :default)
29 (default-c-string-external-format)
30 external-format)))
32 (define-alien-type-method (c-string :unparse) (type)
33 (list 'c-string
34 :external-format (alien-c-string-type-external-format type)
35 :element-type (alien-c-string-type-element-type type)))
37 (define-alien-type-method (c-string :lisp-rep) (type)
38 (declare (ignore type))
39 '(or simple-string null (alien (* char)) (simple-array (unsigned-byte 8))))
41 (define-alien-type-method (c-string :deport-pin-p) (type)
42 (declare (ignore type))
45 (defun c-string-needs-conversion-p (type)
46 #+sb-xc-host
48 #-sb-xc-host
49 (let ((external-format (sb!impl::get-external-format
50 ;; Can't use C-STRING-EXTERNAL-FORMAT here,
51 ;; since the meaning of :DEFAULT can change
52 ;; when *DEFAULT-C-STRING-EXTERNAL-FORMAT*
53 ;; changes.
54 (alien-c-string-type-external-format type))))
55 (not (and external-format
56 (or (eq (caar external-format) :ascii)
57 ;; On non-SB-UNICODE all latin-1 codepoints will fit
58 ;; into a base-char, on SB-UNICODE they won't.
59 #!-sb-unicode
60 (eq (caar external-format) :latin-1))))))
62 (define-alien-type-method (c-string :naturalize-gen) (type alien)
63 `(if (zerop (sap-int ,alien))
64 nil
65 ;; Check whether we need to do a full external-format
66 ;; conversion, or whether we can just do a cheap byte-by-byte
67 ;; copy of the c-string data.
69 ;; On SB-UNICODE we can never do the cheap copy, even if the
70 ;; external format and element-type are suitable, since
71 ;; simple-base-strings may not contain ISO-8859-1 characters.
72 ;; If we need to check for non-ascii data in the input, we
73 ;; might as well go through the usual external-format machinery
74 ;; instead of rewriting another version of it.
75 ,(if #!+sb-unicode t
76 #!-sb-unicode (c-string-needs-conversion-p type)
77 `(sb!alien::c-string-to-string ,alien
78 (c-string-external-format ,type)
79 (alien-c-string-type-element-type
80 ,type))
81 `(%naturalize-c-string ,alien))))
83 (define-alien-type-method (c-string :deport-gen) (type value)
84 (declare (ignore type))
85 ;; This SAP taking is safe as DEPORT callers pin the VALUE when
86 ;; necessary.
87 `(etypecase ,value
88 (null (int-sap 0))
89 ((alien (* char)) (alien-sap ,value))
90 (vector (vector-sap ,value))))
92 (define-alien-type-method (c-string :deport-alloc-gen) (type value)
93 `(etypecase ,value
94 (null nil)
95 ((alien (* char)) ,value)
96 (simple-base-string
97 ,(if (c-string-needs-conversion-p type)
98 ;; If the alien type is not ascii-compatible (+SB-UNICODE)
99 ;; or latin-1-compatible (-SB-UNICODE), we need to do
100 ;; external format conversion.
101 `(string-to-c-string ,value
102 (c-string-external-format ,type))
103 ;; Otherwise we can just pass it uncopied.
104 value))
105 (simple-string
106 (string-to-c-string ,value
107 (c-string-external-format ,type)))))
109 (/show0 "host-c-call.lisp end of file")