Commit | Line | Data |
---|---|---|
49e4877c PA |
1 | # mbrtowc.m4 serial 27 -*- coding: utf-8 -*- |
2 | dnl Copyright (C) 2001-2002, 2004-2005, 2008-2016 Free Software Foundation, | |
8690e634 JK |
3 | dnl Inc. |
4 | dnl This file is free software; the Free Software Foundation | |
5 | dnl gives unlimited permission to copy and/or distribute it, | |
6 | dnl with or without modifications, as long as this notice is preserved. | |
7 | ||
8 | AC_DEFUN([gl_FUNC_MBRTOWC], | |
9 | [ | |
10 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
11 | ||
12 | AC_REQUIRE([AC_TYPE_MBSTATE_T]) | |
13 | gl_MBSTATE_T_BROKEN | |
14 | ||
15 | AC_CHECK_FUNCS_ONCE([mbrtowc]) | |
16 | if test $ac_cv_func_mbrtowc = no; then | |
17 | HAVE_MBRTOWC=0 | |
18 | AC_CHECK_DECLS([mbrtowc],,, [[ | |
19 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
20 | <wchar.h>. | |
21 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
22 | included before <wchar.h>. */ | |
23 | #include <stddef.h> | |
24 | #include <stdio.h> | |
25 | #include <time.h> | |
26 | #include <wchar.h> | |
27 | ]]) | |
28 | if test $ac_cv_have_decl_mbrtowc = yes; then | |
29 | dnl On Minix 3.1.8, the system's <wchar.h> declares mbrtowc() although | |
30 | dnl it does not have the function. Avoid a collision with gnulib's | |
31 | dnl replacement. | |
32 | REPLACE_MBRTOWC=1 | |
33 | fi | |
34 | else | |
35 | if test $REPLACE_MBSTATE_T = 1; then | |
36 | REPLACE_MBRTOWC=1 | |
37 | else | |
38 | gl_MBRTOWC_NULL_ARG1 | |
39 | gl_MBRTOWC_NULL_ARG2 | |
40 | gl_MBRTOWC_RETVAL | |
41 | gl_MBRTOWC_NUL_RETVAL | |
4a626d0a | 42 | gl_MBRTOWC_EMPTY_INPUT |
49e4877c | 43 | gl_MBRTOWC_C_LOCALE |
8690e634 JK |
44 | case "$gl_cv_func_mbrtowc_null_arg1" in |
45 | *yes) ;; | |
46 | *) AC_DEFINE([MBRTOWC_NULL_ARG1_BUG], [1], | |
47 | [Define if the mbrtowc function has the NULL pwc argument bug.]) | |
48 | REPLACE_MBRTOWC=1 | |
49 | ;; | |
50 | esac | |
51 | case "$gl_cv_func_mbrtowc_null_arg2" in | |
52 | *yes) ;; | |
53 | *) AC_DEFINE([MBRTOWC_NULL_ARG2_BUG], [1], | |
54 | [Define if the mbrtowc function has the NULL string argument bug.]) | |
55 | REPLACE_MBRTOWC=1 | |
56 | ;; | |
57 | esac | |
58 | case "$gl_cv_func_mbrtowc_retval" in | |
59 | *yes) ;; | |
60 | *) AC_DEFINE([MBRTOWC_RETVAL_BUG], [1], | |
61 | [Define if the mbrtowc function returns a wrong return value.]) | |
62 | REPLACE_MBRTOWC=1 | |
63 | ;; | |
64 | esac | |
65 | case "$gl_cv_func_mbrtowc_nul_retval" in | |
66 | *yes) ;; | |
67 | *) AC_DEFINE([MBRTOWC_NUL_RETVAL_BUG], [1], | |
68 | [Define if the mbrtowc function does not return 0 for a NUL character.]) | |
69 | REPLACE_MBRTOWC=1 | |
70 | ;; | |
71 | esac | |
4a626d0a PA |
72 | case "$gl_cv_func_mbrtowc_empty_input" in |
73 | *yes) ;; | |
74 | *) AC_DEFINE([MBRTOWC_EMPTY_INPUT_BUG], [1], | |
75 | [Define if the mbrtowc function does not return (size_t) -2 | |
76 | for empty input.]) | |
77 | REPLACE_MBRTOWC=1 | |
78 | ;; | |
79 | esac | |
49e4877c PA |
80 | case $gl_cv_C_locale_sans_EILSEQ in |
81 | *yes) ;; | |
82 | *) AC_DEFINE([C_LOCALE_MAYBE_EILSEQ], [1], | |
83 | [Define to 1 if the C locale may have encoding errors.]) | |
84 | REPLACE_MBRTOWC=1 | |
85 | ;; | |
86 | esac | |
8690e634 JK |
87 | fi |
88 | fi | |
89 | ]) | |
90 | ||
91 | dnl Test whether mbsinit() and mbrtowc() need to be overridden in a way that | |
92 | dnl redefines the semantics of the given mbstate_t type. | |
93 | dnl Result is REPLACE_MBSTATE_T. | |
94 | dnl When this is set to 1, we replace both mbsinit() and mbrtowc(), in order to | |
95 | dnl avoid inconsistencies. | |
96 | ||
97 | AC_DEFUN([gl_MBSTATE_T_BROKEN], | |
98 | [ | |
99 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
100 | ||
101 | AC_REQUIRE([AC_TYPE_MBSTATE_T]) | |
102 | AC_CHECK_FUNCS_ONCE([mbsinit]) | |
103 | AC_CHECK_FUNCS_ONCE([mbrtowc]) | |
104 | if test $ac_cv_func_mbsinit = yes && test $ac_cv_func_mbrtowc = yes; then | |
105 | gl_MBRTOWC_INCOMPLETE_STATE | |
106 | gl_MBRTOWC_SANITYCHECK | |
107 | REPLACE_MBSTATE_T=0 | |
108 | case "$gl_cv_func_mbrtowc_incomplete_state" in | |
109 | *yes) ;; | |
110 | *) REPLACE_MBSTATE_T=1 ;; | |
111 | esac | |
112 | case "$gl_cv_func_mbrtowc_sanitycheck" in | |
113 | *yes) ;; | |
114 | *) REPLACE_MBSTATE_T=1 ;; | |
115 | esac | |
116 | else | |
117 | REPLACE_MBSTATE_T=1 | |
118 | fi | |
119 | ]) | |
120 | ||
121 | dnl Test whether mbrtowc puts the state into non-initial state when parsing an | |
122 | dnl incomplete multibyte character. | |
123 | dnl Result is gl_cv_func_mbrtowc_incomplete_state. | |
124 | ||
125 | AC_DEFUN([gl_MBRTOWC_INCOMPLETE_STATE], | |
126 | [ | |
127 | AC_REQUIRE([AC_PROG_CC]) | |
128 | AC_REQUIRE([gt_LOCALE_JA]) | |
129 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
130 | AC_CACHE_CHECK([whether mbrtowc handles incomplete characters], | |
131 | [gl_cv_func_mbrtowc_incomplete_state], | |
132 | [ | |
133 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
134 | dnl is present. | |
135 | changequote(,)dnl | |
136 | case "$host_os" in | |
137 | # Guess no on AIX and OSF/1. | |
138 | aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;; | |
139 | # Guess yes otherwise. | |
140 | *) gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;; | |
141 | esac | |
142 | changequote([,])dnl | |
143 | if test $LOCALE_JA != none; then | |
144 | AC_RUN_IFELSE( | |
145 | [AC_LANG_SOURCE([[ | |
146 | #include <locale.h> | |
147 | #include <string.h> | |
148 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
149 | <wchar.h>. | |
150 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
151 | included before <wchar.h>. */ | |
152 | #include <stddef.h> | |
153 | #include <stdio.h> | |
154 | #include <time.h> | |
155 | #include <wchar.h> | |
156 | int main () | |
157 | { | |
158 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) | |
159 | { | |
160 | const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */ | |
161 | mbstate_t state; | |
162 | wchar_t wc; | |
163 | ||
164 | memset (&state, '\0', sizeof (mbstate_t)); | |
165 | if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) | |
166 | if (mbsinit (&state)) | |
167 | return 1; | |
168 | } | |
169 | return 0; | |
170 | }]])], | |
171 | [gl_cv_func_mbrtowc_incomplete_state=yes], | |
172 | [gl_cv_func_mbrtowc_incomplete_state=no], | |
173 | [:]) | |
174 | fi | |
175 | ]) | |
176 | ]) | |
177 | ||
178 | dnl Test whether mbrtowc works not worse than mbtowc. | |
179 | dnl Result is gl_cv_func_mbrtowc_sanitycheck. | |
180 | ||
181 | AC_DEFUN([gl_MBRTOWC_SANITYCHECK], | |
182 | [ | |
183 | AC_REQUIRE([AC_PROG_CC]) | |
184 | AC_REQUIRE([gt_LOCALE_ZH_CN]) | |
185 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
186 | AC_CACHE_CHECK([whether mbrtowc works as well as mbtowc], | |
187 | [gl_cv_func_mbrtowc_sanitycheck], | |
188 | [ | |
189 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
190 | dnl is present. | |
191 | changequote(,)dnl | |
192 | case "$host_os" in | |
193 | # Guess no on Solaris 8. | |
194 | solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;; | |
195 | # Guess yes otherwise. | |
196 | *) gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;; | |
197 | esac | |
198 | changequote([,])dnl | |
199 | if test $LOCALE_ZH_CN != none; then | |
200 | AC_RUN_IFELSE( | |
201 | [AC_LANG_SOURCE([[ | |
202 | #include <locale.h> | |
203 | #include <stdlib.h> | |
204 | #include <string.h> | |
205 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
206 | <wchar.h>. | |
207 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
208 | included before <wchar.h>. */ | |
209 | #include <stddef.h> | |
210 | #include <stdio.h> | |
211 | #include <time.h> | |
212 | #include <wchar.h> | |
213 | int main () | |
214 | { | |
215 | /* This fails on Solaris 8: | |
216 | mbrtowc returns 2, and sets wc to 0x00F0. | |
217 | mbtowc returns 4 (correct) and sets wc to 0x5EDC. */ | |
218 | if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) | |
219 | { | |
220 | char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */ | |
221 | mbstate_t state; | |
222 | wchar_t wc; | |
223 | ||
224 | memset (&state, '\0', sizeof (mbstate_t)); | |
225 | if (mbrtowc (&wc, input + 3, 6, &state) != 4 | |
226 | && mbtowc (&wc, input + 3, 6) == 4) | |
227 | return 1; | |
228 | } | |
229 | return 0; | |
230 | }]])], | |
231 | [gl_cv_func_mbrtowc_sanitycheck=yes], | |
232 | [gl_cv_func_mbrtowc_sanitycheck=no], | |
233 | [:]) | |
234 | fi | |
235 | ]) | |
236 | ]) | |
237 | ||
238 | dnl Test whether mbrtowc supports a NULL pwc argument correctly. | |
239 | dnl Result is gl_cv_func_mbrtowc_null_arg1. | |
240 | ||
241 | AC_DEFUN([gl_MBRTOWC_NULL_ARG1], | |
242 | [ | |
243 | AC_REQUIRE([AC_PROG_CC]) | |
244 | AC_REQUIRE([gt_LOCALE_FR_UTF8]) | |
245 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
246 | AC_CACHE_CHECK([whether mbrtowc handles a NULL pwc argument], | |
247 | [gl_cv_func_mbrtowc_null_arg1], | |
248 | [ | |
249 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
250 | dnl is present. | |
251 | changequote(,)dnl | |
252 | case "$host_os" in | |
253 | # Guess no on Solaris. | |
254 | solaris*) gl_cv_func_mbrtowc_null_arg1="guessing no" ;; | |
255 | # Guess yes otherwise. | |
256 | *) gl_cv_func_mbrtowc_null_arg1="guessing yes" ;; | |
257 | esac | |
258 | changequote([,])dnl | |
259 | if test $LOCALE_FR_UTF8 != none; then | |
260 | AC_RUN_IFELSE( | |
261 | [AC_LANG_SOURCE([[ | |
262 | #include <locale.h> | |
263 | #include <stdlib.h> | |
264 | #include <string.h> | |
265 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
266 | <wchar.h>. | |
267 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
268 | included before <wchar.h>. */ | |
269 | #include <stddef.h> | |
270 | #include <stdio.h> | |
271 | #include <time.h> | |
272 | #include <wchar.h> | |
273 | int main () | |
274 | { | |
275 | int result = 0; | |
276 | ||
277 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) | |
278 | { | |
279 | char input[] = "\303\237er"; | |
280 | mbstate_t state; | |
281 | wchar_t wc; | |
282 | size_t ret; | |
283 | ||
284 | memset (&state, '\0', sizeof (mbstate_t)); | |
285 | wc = (wchar_t) 0xBADFACE; | |
286 | ret = mbrtowc (&wc, input, 5, &state); | |
287 | if (ret != 2) | |
288 | result |= 1; | |
289 | if (!mbsinit (&state)) | |
290 | result |= 2; | |
291 | ||
292 | memset (&state, '\0', sizeof (mbstate_t)); | |
293 | ret = mbrtowc (NULL, input, 5, &state); | |
294 | if (ret != 2) /* Solaris 7 fails here: ret is -1. */ | |
295 | result |= 4; | |
296 | if (!mbsinit (&state)) | |
297 | result |= 8; | |
298 | } | |
299 | return result; | |
300 | }]])], | |
301 | [gl_cv_func_mbrtowc_null_arg1=yes], | |
302 | [gl_cv_func_mbrtowc_null_arg1=no], | |
303 | [:]) | |
304 | fi | |
305 | ]) | |
306 | ]) | |
307 | ||
308 | dnl Test whether mbrtowc supports a NULL string argument correctly. | |
309 | dnl Result is gl_cv_func_mbrtowc_null_arg2. | |
310 | ||
311 | AC_DEFUN([gl_MBRTOWC_NULL_ARG2], | |
312 | [ | |
313 | AC_REQUIRE([AC_PROG_CC]) | |
314 | AC_REQUIRE([gt_LOCALE_FR_UTF8]) | |
315 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
316 | AC_CACHE_CHECK([whether mbrtowc handles a NULL string argument], | |
317 | [gl_cv_func_mbrtowc_null_arg2], | |
318 | [ | |
319 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
320 | dnl is present. | |
321 | changequote(,)dnl | |
322 | case "$host_os" in | |
323 | # Guess no on OSF/1. | |
324 | osf*) gl_cv_func_mbrtowc_null_arg2="guessing no" ;; | |
325 | # Guess yes otherwise. | |
326 | *) gl_cv_func_mbrtowc_null_arg2="guessing yes" ;; | |
327 | esac | |
328 | changequote([,])dnl | |
329 | if test $LOCALE_FR_UTF8 != none; then | |
330 | AC_RUN_IFELSE( | |
331 | [AC_LANG_SOURCE([[ | |
332 | #include <locale.h> | |
333 | #include <string.h> | |
334 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
335 | <wchar.h>. | |
336 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
337 | included before <wchar.h>. */ | |
338 | #include <stddef.h> | |
339 | #include <stdio.h> | |
340 | #include <time.h> | |
341 | #include <wchar.h> | |
342 | int main () | |
343 | { | |
344 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) | |
345 | { | |
346 | mbstate_t state; | |
347 | wchar_t wc; | |
348 | int ret; | |
349 | ||
350 | memset (&state, '\0', sizeof (mbstate_t)); | |
351 | wc = (wchar_t) 0xBADFACE; | |
352 | mbrtowc (&wc, NULL, 5, &state); | |
353 | /* Check that wc was not modified. */ | |
354 | if (wc != (wchar_t) 0xBADFACE) | |
355 | return 1; | |
356 | } | |
357 | return 0; | |
358 | }]])], | |
359 | [gl_cv_func_mbrtowc_null_arg2=yes], | |
360 | [gl_cv_func_mbrtowc_null_arg2=no], | |
361 | [:]) | |
362 | fi | |
363 | ]) | |
364 | ]) | |
365 | ||
366 | dnl Test whether mbrtowc, when parsing the end of a multibyte character, | |
367 | dnl correctly returns the number of bytes that were needed to complete the | |
368 | dnl character (not the total number of bytes of the multibyte character). | |
369 | dnl Result is gl_cv_func_mbrtowc_retval. | |
370 | ||
371 | AC_DEFUN([gl_MBRTOWC_RETVAL], | |
372 | [ | |
373 | AC_REQUIRE([AC_PROG_CC]) | |
374 | AC_REQUIRE([gt_LOCALE_FR_UTF8]) | |
375 | AC_REQUIRE([gt_LOCALE_JA]) | |
376 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
377 | AC_CACHE_CHECK([whether mbrtowc has a correct return value], | |
378 | [gl_cv_func_mbrtowc_retval], | |
379 | [ | |
380 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
381 | dnl is present. | |
382 | changequote(,)dnl | |
383 | case "$host_os" in | |
384 | # Guess no on HP-UX, Solaris, native Windows. | |
385 | hpux* | solaris* | mingw*) gl_cv_func_mbrtowc_retval="guessing no" ;; | |
386 | # Guess yes otherwise. | |
387 | *) gl_cv_func_mbrtowc_retval="guessing yes" ;; | |
388 | esac | |
389 | changequote([,])dnl | |
390 | if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none \ | |
391 | || { case "$host_os" in mingw*) true;; *) false;; esac; }; then | |
392 | AC_RUN_IFELSE( | |
393 | [AC_LANG_SOURCE([[ | |
394 | #include <locale.h> | |
395 | #include <string.h> | |
396 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
397 | <wchar.h>. | |
398 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
399 | included before <wchar.h>. */ | |
400 | #include <stddef.h> | |
401 | #include <stdio.h> | |
402 | #include <time.h> | |
403 | #include <wchar.h> | |
404 | int main () | |
405 | { | |
406 | int result = 0; | |
407 | int found_some_locale = 0; | |
408 | /* This fails on Solaris. */ | |
409 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) | |
410 | { | |
411 | char input[] = "B\303\274\303\237er"; /* "Büßer" */ | |
412 | mbstate_t state; | |
413 | wchar_t wc; | |
414 | ||
415 | memset (&state, '\0', sizeof (mbstate_t)); | |
416 | if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) | |
417 | { | |
418 | input[1] = '\0'; | |
419 | if (mbrtowc (&wc, input + 2, 5, &state) != 1) | |
420 | result |= 1; | |
421 | } | |
422 | found_some_locale = 1; | |
423 | } | |
424 | /* This fails on HP-UX 11.11. */ | |
425 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) | |
426 | { | |
427 | char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */ | |
428 | mbstate_t state; | |
429 | wchar_t wc; | |
430 | ||
431 | memset (&state, '\0', sizeof (mbstate_t)); | |
432 | if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) | |
433 | { | |
434 | input[1] = '\0'; | |
435 | if (mbrtowc (&wc, input + 2, 5, &state) != 2) | |
436 | result |= 2; | |
437 | } | |
438 | found_some_locale = 1; | |
439 | } | |
440 | /* This fails on native Windows. */ | |
441 | if (setlocale (LC_ALL, "Japanese_Japan.932") != NULL) | |
442 | { | |
443 | char input[] = "<\223\372\226\173\214\352>"; /* "<日本語>" */ | |
444 | mbstate_t state; | |
445 | wchar_t wc; | |
446 | ||
447 | memset (&state, '\0', sizeof (mbstate_t)); | |
448 | if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2)) | |
449 | { | |
450 | input[3] = '\0'; | |
451 | if (mbrtowc (&wc, input + 4, 4, &state) != 1) | |
452 | result |= 4; | |
453 | } | |
454 | found_some_locale = 1; | |
455 | } | |
456 | if (setlocale (LC_ALL, "Chinese_Taiwan.950") != NULL) | |
457 | { | |
458 | char input[] = "<\244\351\245\273\273\171>"; /* "<日本語>" */ | |
459 | mbstate_t state; | |
460 | wchar_t wc; | |
461 | ||
462 | memset (&state, '\0', sizeof (mbstate_t)); | |
463 | if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2)) | |
464 | { | |
465 | input[3] = '\0'; | |
466 | if (mbrtowc (&wc, input + 4, 4, &state) != 1) | |
467 | result |= 8; | |
468 | } | |
469 | found_some_locale = 1; | |
470 | } | |
471 | if (setlocale (LC_ALL, "Chinese_China.936") != NULL) | |
472 | { | |
473 | char input[] = "<\310\325\261\276\325\132>"; /* "<日本語>" */ | |
474 | mbstate_t state; | |
475 | wchar_t wc; | |
476 | ||
477 | memset (&state, '\0', sizeof (mbstate_t)); | |
478 | if (mbrtowc (&wc, input + 3, 1, &state) == (size_t)(-2)) | |
479 | { | |
480 | input[3] = '\0'; | |
481 | if (mbrtowc (&wc, input + 4, 4, &state) != 1) | |
482 | result |= 16; | |
483 | } | |
484 | found_some_locale = 1; | |
485 | } | |
486 | return (found_some_locale ? result : 77); | |
487 | }]])], | |
488 | [gl_cv_func_mbrtowc_retval=yes], | |
489 | [if test $? != 77; then | |
490 | gl_cv_func_mbrtowc_retval=no | |
491 | fi | |
492 | ], | |
493 | [:]) | |
494 | fi | |
495 | ]) | |
496 | ]) | |
497 | ||
498 | dnl Test whether mbrtowc, when parsing a NUL character, correctly returns 0. | |
499 | dnl Result is gl_cv_func_mbrtowc_nul_retval. | |
500 | ||
501 | AC_DEFUN([gl_MBRTOWC_NUL_RETVAL], | |
502 | [ | |
503 | AC_REQUIRE([AC_PROG_CC]) | |
504 | AC_REQUIRE([gt_LOCALE_ZH_CN]) | |
505 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
506 | AC_CACHE_CHECK([whether mbrtowc returns 0 when parsing a NUL character], | |
507 | [gl_cv_func_mbrtowc_nul_retval], | |
508 | [ | |
509 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
510 | dnl is present. | |
511 | changequote(,)dnl | |
512 | case "$host_os" in | |
513 | # Guess no on Solaris 8 and 9. | |
514 | solaris2.[89]) gl_cv_func_mbrtowc_nul_retval="guessing no" ;; | |
515 | # Guess yes otherwise. | |
516 | *) gl_cv_func_mbrtowc_nul_retval="guessing yes" ;; | |
517 | esac | |
518 | changequote([,])dnl | |
519 | if test $LOCALE_ZH_CN != none; then | |
520 | AC_RUN_IFELSE( | |
521 | [AC_LANG_SOURCE([[ | |
522 | #include <locale.h> | |
523 | #include <string.h> | |
524 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
525 | <wchar.h>. | |
526 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
527 | included before <wchar.h>. */ | |
528 | #include <stddef.h> | |
529 | #include <stdio.h> | |
530 | #include <time.h> | |
531 | #include <wchar.h> | |
532 | int main () | |
533 | { | |
534 | /* This fails on Solaris 8 and 9. */ | |
535 | if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) | |
536 | { | |
537 | mbstate_t state; | |
538 | wchar_t wc; | |
539 | ||
540 | memset (&state, '\0', sizeof (mbstate_t)); | |
541 | if (mbrtowc (&wc, "", 1, &state) != 0) | |
542 | return 1; | |
543 | } | |
544 | return 0; | |
545 | }]])], | |
546 | [gl_cv_func_mbrtowc_nul_retval=yes], | |
547 | [gl_cv_func_mbrtowc_nul_retval=no], | |
548 | [:]) | |
549 | fi | |
550 | ]) | |
551 | ]) | |
552 | ||
4a626d0a PA |
553 | dnl Test whether mbrtowc returns the correct value on empty input. |
554 | ||
555 | AC_DEFUN([gl_MBRTOWC_EMPTY_INPUT], | |
556 | [ | |
557 | AC_REQUIRE([AC_PROG_CC]) | |
558 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
559 | AC_CACHE_CHECK([whether mbrtowc works on empty input], | |
560 | [gl_cv_func_mbrtowc_empty_input], | |
561 | [ | |
562 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
563 | dnl is present. | |
564 | changequote(,)dnl | |
565 | case "$host_os" in | |
566 | # Guess no on AIX and glibc systems. | |
567 | aix* | *-gnu*) | |
568 | gl_cv_func_mbrtowc_empty_input="guessing no" ;; | |
569 | *) gl_cv_func_mbrtowc_empty_input="guessing yes" ;; | |
570 | esac | |
571 | changequote([,])dnl | |
572 | AC_RUN_IFELSE( | |
573 | [AC_LANG_SOURCE([[ | |
574 | #include <wchar.h> | |
575 | static wchar_t wc; | |
576 | static mbstate_t mbs; | |
577 | int | |
578 | main (void) | |
579 | { | |
49e4877c | 580 | return mbrtowc (&wc, "", 0, &mbs) != (size_t) -2; |
4a626d0a | 581 | }]])], |
4a626d0a | 582 | [gl_cv_func_mbrtowc_empty_input=yes], |
49e4877c | 583 | [gl_cv_func_mbrtowc_empty_input=no], |
4a626d0a PA |
584 | [:]) |
585 | ]) | |
586 | ]) | |
587 | ||
49e4877c PA |
588 | dnl Test whether mbrtowc reports encoding errors in the C locale. |
589 | dnl Although POSIX was never intended to allow this, the GNU C Library | |
590 | dnl and other implementations do it. See: | |
591 | dnl https://sourceware.org/bugzilla/show_bug.cgi?id=19932 | |
592 | ||
593 | AC_DEFUN([gl_MBRTOWC_C_LOCALE], | |
594 | [ | |
595 | AC_CACHE_CHECK([whether the C locale is free of encoding errors], | |
596 | [gl_cv_C_locale_sans_EILSEQ], | |
597 | [ | |
598 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
599 | dnl is present. | |
600 | gl_cv_C_locale_sans_EILSEQ="guessing no" | |
601 | ||
602 | AC_RUN_IFELSE( | |
603 | [AC_LANG_PROGRAM( | |
604 | [[#include <limits.h> | |
605 | #include <locale.h> | |
606 | #include <wchar.h> | |
607 | ]], [[ | |
608 | int i; | |
609 | char *locale = setlocale (LC_ALL, "C"); | |
610 | if (! locale) | |
611 | return 1; | |
612 | for (i = CHAR_MIN; i <= CHAR_MAX; i++) | |
613 | { | |
614 | char c = i; | |
615 | wchar_t wc; | |
616 | mbstate_t mbs = { 0, }; | |
617 | size_t ss = mbrtowc (&wc, &c, 1, &mbs); | |
618 | if (1 < ss) | |
619 | return 1; | |
620 | } | |
621 | return 0; | |
622 | ]])], | |
623 | [gl_cv_C_locale_sans_EILSEQ=yes], | |
624 | [gl_cv_C_locale_sans_EILSEQ=no], | |
625 | [:])]) | |
626 | ]) | |
627 | ||
8690e634 JK |
628 | # Prerequisites of lib/mbrtowc.c. |
629 | AC_DEFUN([gl_PREREQ_MBRTOWC], [ | |
630 | : | |
631 | ]) | |
632 | ||
633 | ||
634 | dnl From Paul Eggert | |
635 | ||
636 | dnl This is an override of an autoconf macro. | |
637 | ||
638 | AC_DEFUN([AC_FUNC_MBRTOWC], | |
639 | [ | |
640 | dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60. | |
641 | AC_CACHE_CHECK([whether mbrtowc and mbstate_t are properly declared], | |
642 | gl_cv_func_mbrtowc, | |
643 | [AC_LINK_IFELSE( | |
644 | [AC_LANG_PROGRAM( | |
645 | [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be | |
646 | included before <wchar.h>. | |
647 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> | |
648 | must be included before <wchar.h>. */ | |
649 | #include <stddef.h> | |
650 | #include <stdio.h> | |
651 | #include <time.h> | |
652 | #include <wchar.h>]], | |
653 | [[wchar_t wc; | |
654 | char const s[] = ""; | |
655 | size_t n = 1; | |
656 | mbstate_t state; | |
657 | return ! (sizeof state && (mbrtowc) (&wc, s, n, &state));]])], | |
658 | gl_cv_func_mbrtowc=yes, | |
659 | gl_cv_func_mbrtowc=no)]) | |
660 | if test $gl_cv_func_mbrtowc = yes; then | |
661 | AC_DEFINE([HAVE_MBRTOWC], [1], | |
662 | [Define to 1 if mbrtowc and mbstate_t are properly declared.]) | |
663 | fi | |
664 | ]) |