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1 | # mbrtowc.m4 serial 12 |
2 | dnl Copyright (C) 2001-2002, 2004-2005, 2008 Free Software Foundation, Inc. | |
3 | dnl This file is free software; the Free Software Foundation | |
4 | dnl gives unlimited permission to copy and/or distribute it, | |
5 | dnl with or without modifications, as long as this notice is preserved. | |
6 | ||
7 | AC_DEFUN([gl_FUNC_MBRTOWC], | |
8 | [ | |
9 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
10 | ||
11 | AC_REQUIRE([AC_TYPE_MBSTATE_T]) | |
12 | gl_MBSTATE_T_BROKEN | |
13 | if test $REPLACE_MBSTATE_T = 1; then | |
14 | REPLACE_MBRTOWC=1 | |
15 | fi | |
16 | AC_CHECK_FUNCS_ONCE([mbrtowc]) | |
17 | if test $ac_cv_func_mbrtowc = no; then | |
18 | HAVE_MBRTOWC=0 | |
19 | fi | |
20 | if test $HAVE_MBRTOWC != 0 && test $REPLACE_MBRTOWC != 1; then | |
21 | gl_MBRTOWC_NULL_ARG | |
22 | gl_MBRTOWC_RETVAL | |
23 | gl_MBRTOWC_NUL_RETVAL | |
24 | case "$gl_cv_func_mbrtowc_null_arg" in | |
25 | *yes) ;; | |
26 | *) AC_DEFINE([MBRTOWC_NULL_ARG_BUG], [1], | |
27 | [Define if the mbrtowc function has the NULL string argument bug.]) | |
28 | REPLACE_MBRTOWC=1 | |
29 | ;; | |
30 | esac | |
31 | case "$gl_cv_func_mbrtowc_retval" in | |
32 | *yes) ;; | |
33 | *) AC_DEFINE([MBRTOWC_RETVAL_BUG], [1], | |
34 | [Define if the mbrtowc function returns a wrong return value.]) | |
35 | REPLACE_MBRTOWC=1 | |
36 | ;; | |
37 | esac | |
38 | case "$gl_cv_func_mbrtowc_nul_retval" in | |
39 | *yes) ;; | |
40 | *) AC_DEFINE([MBRTOWC_NUL_RETVAL_BUG], [1], | |
41 | [Define if the mbrtowc function does not return 0 for a NUL character.]) | |
42 | REPLACE_MBRTOWC=1 | |
43 | ;; | |
44 | esac | |
45 | fi | |
46 | if test $HAVE_MBRTOWC = 0 || test $REPLACE_MBRTOWC = 1; then | |
47 | gl_REPLACE_WCHAR_H | |
48 | AC_LIBOBJ([mbrtowc]) | |
49 | gl_PREREQ_MBRTOWC | |
50 | fi | |
51 | ]) | |
52 | ||
53 | dnl Test whether mbsinit() and mbrtowc() need to be overridden in a way that | |
54 | dnl redefines the semantics of the given mbstate_t type. | |
55 | dnl Result is REPLACE_MBSTATE_T. | |
56 | dnl When this is set to 1, we replace both mbsinit() and mbrtowc(), in order to | |
57 | dnl avoid inconsistencies. | |
58 | ||
59 | AC_DEFUN([gl_MBSTATE_T_BROKEN], | |
60 | [ | |
61 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
62 | ||
63 | AC_REQUIRE([AC_TYPE_MBSTATE_T]) | |
64 | AC_CHECK_FUNCS_ONCE([mbsinit]) | |
65 | AC_CHECK_FUNCS_ONCE([mbrtowc]) | |
66 | if test $ac_cv_func_mbsinit = yes && test $ac_cv_func_mbrtowc = yes; then | |
67 | gl_MBRTOWC_INCOMPLETE_STATE | |
68 | case "$gl_cv_func_mbrtowc_incomplete_state" in | |
69 | *yes) REPLACE_MBSTATE_T=0 ;; | |
70 | *) REPLACE_MBSTATE_T=1 ;; | |
71 | esac | |
72 | else | |
73 | REPLACE_MBSTATE_T=1 | |
74 | fi | |
75 | if test $REPLACE_MBSTATE_T = 1; then | |
76 | gl_REPLACE_WCHAR_H | |
77 | fi | |
78 | ]) | |
79 | ||
80 | dnl Test whether mbrtowc puts the state into non-initial state when parsing an | |
81 | dnl incomplete multibyte character. | |
82 | dnl Result is gl_cv_func_mbrtowc_incomplete_state. | |
83 | ||
84 | AC_DEFUN([gl_MBRTOWC_INCOMPLETE_STATE], | |
85 | [ | |
86 | AC_REQUIRE([AC_PROG_CC]) | |
87 | AC_REQUIRE([gt_LOCALE_JA]) | |
88 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
89 | AC_CACHE_CHECK([whether mbrtowc handles incomplete characters], | |
90 | [gl_cv_func_mbrtowc_incomplete_state], | |
91 | [ | |
92 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
93 | dnl is present. | |
94 | changequote(,)dnl | |
95 | case "$host_os" in | |
96 | # Guess no on AIX and OSF/1. | |
97 | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;; | |
98 | # Guess yes otherwise. | |
99 | *) gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;; | |
100 | esac | |
101 | changequote([,])dnl | |
102 | if test $LOCALE_JA != none; then | |
103 | AC_TRY_RUN([ | |
104 | #include <locale.h> | |
105 | #include <string.h> | |
106 | #include <wchar.h> | |
107 | int main () | |
108 | { | |
109 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) | |
110 | { | |
111 | const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */ | |
112 | mbstate_t state; | |
113 | wchar_t wc; | |
114 | ||
115 | memset (&state, '\0', sizeof (mbstate_t)); | |
116 | if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) | |
117 | if (mbsinit (&state)) | |
118 | return 1; | |
119 | } | |
120 | return 0; | |
121 | }], | |
122 | [gl_cv_func_mbrtowc_incomplete_state=yes], | |
123 | [gl_cv_func_mbrtowc_incomplete_state=no], | |
124 | []) | |
125 | fi | |
126 | ]) | |
127 | ]) | |
128 | ||
129 | dnl Test whether mbrtowc supports a NULL string argument correctly. | |
130 | dnl Result is gl_cv_func_mbrtowc_null_arg. | |
131 | ||
132 | AC_DEFUN([gl_MBRTOWC_NULL_ARG], | |
133 | [ | |
134 | AC_REQUIRE([AC_PROG_CC]) | |
135 | AC_REQUIRE([gt_LOCALE_FR_UTF8]) | |
136 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
137 | AC_CACHE_CHECK([whether mbrtowc handles a NULL string argument], | |
138 | [gl_cv_func_mbrtowc_null_arg], | |
139 | [ | |
140 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
141 | dnl is present. | |
142 | changequote(,)dnl | |
143 | case "$host_os" in | |
144 | # Guess no on OSF/1. | |
145 | osf*) gl_cv_func_mbrtowc_null_arg="guessing no" ;; | |
146 | # Guess yes otherwise. | |
147 | *) gl_cv_func_mbrtowc_null_arg="guessing yes" ;; | |
148 | esac | |
149 | changequote([,])dnl | |
150 | if test $LOCALE_FR_UTF8 != none; then | |
151 | AC_TRY_RUN([ | |
152 | #include <locale.h> | |
153 | #include <string.h> | |
154 | #include <wchar.h> | |
155 | int main () | |
156 | { | |
157 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) | |
158 | { | |
159 | mbstate_t state; | |
160 | wchar_t wc; | |
161 | int ret; | |
162 | ||
163 | memset (&state, '\0', sizeof (mbstate_t)); | |
164 | wc = (wchar_t) 0xBADFACE; | |
165 | mbrtowc (&wc, NULL, 5, &state); | |
166 | /* Check that wc was not modified. */ | |
167 | if (wc != (wchar_t) 0xBADFACE) | |
168 | return 1; | |
169 | } | |
170 | return 0; | |
171 | }], [gl_cv_func_mbrtowc_null_arg=yes], [gl_cv_func_mbrtowc_null_arg=no], []) | |
172 | fi | |
173 | ]) | |
174 | ]) | |
175 | ||
176 | dnl Test whether mbrtowc, when parsing the end of a multibyte character, | |
177 | dnl correctly returns the number of bytes that were needed to complete the | |
178 | dnl character (not the total number of bytes of the multibyte character). | |
179 | dnl Result is gl_cv_func_mbrtowc_retval. | |
180 | ||
181 | AC_DEFUN([gl_MBRTOWC_RETVAL], | |
182 | [ | |
183 | AC_REQUIRE([AC_PROG_CC]) | |
184 | AC_REQUIRE([gt_LOCALE_FR_UTF8]) | |
185 | AC_REQUIRE([gt_LOCALE_JA]) | |
186 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
187 | AC_CACHE_CHECK([whether mbrtowc has a correct return value], | |
188 | [gl_cv_func_mbrtowc_retval], | |
189 | [ | |
190 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
191 | dnl is present. | |
192 | changequote(,)dnl | |
193 | case "$host_os" in | |
194 | # Guess no on HP-UX and Solaris. | |
195 | hpux* | solaris*) gl_cv_func_mbrtowc_retval="guessing no" ;; | |
196 | # Guess yes otherwise. | |
197 | *) gl_cv_func_mbrtowc_retval="guessing yes" ;; | |
198 | esac | |
199 | changequote([,])dnl | |
200 | if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then | |
201 | AC_TRY_RUN([ | |
202 | #include <locale.h> | |
203 | #include <string.h> | |
204 | #include <wchar.h> | |
205 | int main () | |
206 | { | |
207 | /* This fails on Solaris. */ | |
208 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) | |
209 | { | |
210 | char input[] = "B\303\274\303\237er"; /* "Büßer" */ | |
211 | mbstate_t state; | |
212 | wchar_t wc; | |
213 | ||
214 | memset (&state, '\0', sizeof (mbstate_t)); | |
215 | if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) | |
216 | { | |
217 | input[1] = '\0'; | |
218 | if (mbrtowc (&wc, input + 2, 5, &state) != 1) | |
219 | return 1; | |
220 | } | |
221 | } | |
222 | /* This fails on HP-UX 11.11. */ | |
223 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) | |
224 | { | |
225 | char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */ | |
226 | mbstate_t state; | |
227 | wchar_t wc; | |
228 | ||
229 | memset (&state, '\0', sizeof (mbstate_t)); | |
230 | if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) | |
231 | { | |
232 | input[1] = '\0'; | |
233 | if (mbrtowc (&wc, input + 2, 5, &state) != 2) | |
234 | return 1; | |
235 | } | |
236 | } | |
237 | return 0; | |
238 | }], | |
239 | [gl_cv_func_mbrtowc_retval=yes], | |
240 | [gl_cv_func_mbrtowc_retval=no], | |
241 | []) | |
242 | fi | |
243 | ]) | |
244 | ]) | |
245 | ||
246 | dnl Test whether mbrtowc, when parsing a NUL character, correctly returns 0. | |
247 | dnl Result is gl_cv_func_mbrtowc_nul_retval. | |
248 | ||
249 | AC_DEFUN([gl_MBRTOWC_NUL_RETVAL], | |
250 | [ | |
251 | AC_REQUIRE([AC_PROG_CC]) | |
252 | AC_REQUIRE([gt_LOCALE_ZH_CN]) | |
253 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
254 | AC_CACHE_CHECK([whether mbrtowc returns 0 when parsing a NUL character], | |
255 | [gl_cv_func_mbrtowc_nul_retval], | |
256 | [ | |
257 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
258 | dnl is present. | |
259 | changequote(,)dnl | |
260 | case "$host_os" in | |
261 | # Guess no on Solaris 9. | |
262 | solaris2.9) gl_cv_func_mbrtowc_nul_retval="guessing no" ;; | |
263 | # Guess yes otherwise. | |
264 | *) gl_cv_func_mbrtowc_nul_retval="guessing yes" ;; | |
265 | esac | |
266 | changequote([,])dnl | |
267 | if test $LOCALE_ZH_CN != none; then | |
268 | AC_TRY_RUN([ | |
269 | #include <locale.h> | |
270 | #include <string.h> | |
271 | #include <wchar.h> | |
272 | int main () | |
273 | { | |
274 | /* This fails on Solaris 9. */ | |
275 | if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) | |
276 | { | |
277 | mbstate_t state; | |
278 | wchar_t wc; | |
279 | ||
280 | memset (&state, '\0', sizeof (mbstate_t)); | |
281 | if (mbrtowc (&wc, "", 1, &state) != 0) | |
282 | return 1; | |
283 | } | |
284 | return 0; | |
285 | }], | |
286 | [gl_cv_func_mbrtowc_nul_retval=yes], | |
287 | [gl_cv_func_mbrtowc_nul_retval=no], | |
288 | []) | |
289 | fi | |
290 | ]) | |
291 | ]) | |
292 | ||
293 | # Prerequisites of lib/mbrtowc.c. | |
294 | AC_DEFUN([gl_PREREQ_MBRTOWC], [ | |
295 | : | |
296 | ]) | |
297 | ||
298 | ||
299 | dnl From Paul Eggert | |
300 | ||
301 | dnl This override of an autoconf macro can be removed when autoconf 2.60 or | |
302 | dnl newer can be assumed everywhere. | |
303 | ||
304 | m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.60]),[-1],[ | |
305 | AC_DEFUN([AC_FUNC_MBRTOWC], | |
306 | [ | |
307 | dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60. | |
308 | AC_CACHE_CHECK([whether mbrtowc and mbstate_t are properly declared], | |
309 | gl_cv_func_mbrtowc, | |
310 | [AC_LINK_IFELSE( | |
311 | [AC_LANG_PROGRAM( | |
312 | [[#include <wchar.h>]], | |
313 | [[wchar_t wc; | |
314 | char const s[] = ""; | |
315 | size_t n = 1; | |
316 | mbstate_t state; | |
317 | return ! (sizeof state && (mbrtowc) (&wc, s, n, &state));]])], | |
318 | gl_cv_func_mbrtowc=yes, | |
319 | gl_cv_func_mbrtowc=no)]) | |
320 | if test $gl_cv_func_mbrtowc = yes; then | |
321 | AC_DEFINE([HAVE_MBRTOWC], 1, | |
322 | [Define to 1 if mbrtowc and mbstate_t are properly declared.]) | |
323 | fi | |
324 | ]) | |
325 | ]) |