1 /* Copyright (C) 1998-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
25 #include <locale/localeinfo.h>
26 #include <wcsmbsload.h>
27 #include <bits/libc-lock.h>
30 /* These are the descriptions for the default conversion functions. */
31 static const struct __gconv_step to_wc
=
33 .__shlib_handle
= NULL
,
36 .__from_name
= (char *) "ANSI_X3.4-1968//TRANSLIT",
37 .__to_name
= (char *) "INTERNAL",
38 .__fct
= __gconv_transform_ascii_internal
,
39 .__btowc_fct
= __gconv_btwoc_ascii
,
42 .__min_needed_from
= 1,
43 .__max_needed_from
= 1,
50 static const struct __gconv_step to_mb
=
52 .__shlib_handle
= NULL
,
55 .__from_name
= (char *) "INTERNAL",
56 .__to_name
= (char *) "ANSI_X3.4-1968//TRANSLIT",
57 .__fct
= __gconv_transform_internal_ascii
,
61 .__min_needed_from
= 4,
62 .__max_needed_from
= 4,
70 /* For the default locale we only have to handle ANSI_X3.4-1968. */
71 const struct gconv_fcts __wcsmbs_gconv_fcts_c
=
73 .towc
= (struct __gconv_step
*) &to_wc
,
75 .tomb
= (struct __gconv_step
*) &to_mb
,
82 __wcsmbs_getfct (const char *to
, const char *from
, size_t *nstepsp
)
85 struct __gconv_step
*result
;
91 if (__gconv_find_transform (to
, from
, &result
, &nsteps
, 0) != __GCONV_OK
)
92 /* Loading the conversion step is not possible. */
95 /* Maybe it is someday necessary to allow more than one step.
96 Currently this is not the case since the conversions handled here
97 are from and to INTERNAL and there always is a converted for
98 that. It the directly following code is enabled the libio
99 functions will have to allocate appropriate __gconv_step_data
100 elements instead of only one. */
102 /* Count the number of stateful conversions. Since we will only
103 have one 'mbstate_t' object available we can only deal with one
104 stateful conversion. */
106 for (cnt
= 0; cnt
< nsteps
; ++cnt
)
107 if (result
[cnt
].__stateful
)
114 /* We cannot handle this case. */
115 __gconv_close_transform (result
, nsteps
);
125 /* Extract from the given locale name the character set portion. Since
126 only the XPG form of the name includes this information we don't have
127 to take care for the CEN form. */
128 #define extract_charset_name(str) \
130 const char *cp = str; \
131 char *result = NULL; \
133 cp += strcspn (cp, "@.+,"); \
136 const char *endp = ++cp; \
137 while (*endp != '\0' && *endp != '@') \
140 result = strndupa (cp, endp - cp); \
146 /* Some of the functions here must not be used while setlocale is called. */
147 __libc_rwlock_define (extern, __libc_setlocale_lock attribute_hidden
)
149 /* Load conversion functions for the currently selected locale. */
152 __wcsmbs_load_conv (struct __locale_data
*new_category
)
154 /* Acquire the lock. */
155 __libc_rwlock_wrlock (__libc_setlocale_lock
);
157 /* We should repeat the test since while we waited some other thread
158 might have run this function. */
159 if (__glibc_likely (new_category
->private.ctype
== NULL
))
161 /* We must find the real functions. */
162 const char *charset_name
;
163 const char *complete_name
;
164 struct gconv_fcts
*new_fcts
;
167 /* Allocate the gconv_fcts structure. */
168 new_fcts
= calloc (1, sizeof *new_fcts
);
169 if (new_fcts
== NULL
)
172 /* Get name of charset of the locale. */
173 charset_name
= new_category
->values
[_NL_ITEM_INDEX(CODESET
)].string
;
175 /* Does the user want transliteration? */
176 use_translit
= new_category
->use_translit
;
178 /* Normalize the name and add the slashes necessary for a
180 complete_name
= norm_add_slashes (charset_name
,
181 use_translit
? "TRANSLIT" : "");
183 /* It is not necessary to use transliteration in this direction
184 since the internal character set is supposed to be able to
185 represent all others. */
186 new_fcts
->towc
= __wcsmbs_getfct ("INTERNAL", complete_name
,
187 &new_fcts
->towc_nsteps
);
188 if (new_fcts
->towc
!= NULL
)
189 new_fcts
->tomb
= __wcsmbs_getfct (complete_name
, "INTERNAL",
190 &new_fcts
->tomb_nsteps
);
192 /* If any of the conversion functions is not available we don't
193 use any since this would mean we cannot convert back and
194 forth. NB: NEW_FCTS was allocated with calloc. */
195 if (new_fcts
->tomb
== NULL
)
197 if (new_fcts
->towc
!= NULL
)
198 __gconv_close_transform (new_fcts
->towc
, new_fcts
->towc_nsteps
);
203 new_category
->private.ctype
= &__wcsmbs_gconv_fcts_c
;
207 new_category
->private.ctype
= new_fcts
;
208 new_category
->private.cleanup
= &_nl_cleanup_ctype
;
212 __libc_rwlock_unlock (__libc_setlocale_lock
);
216 /* Clone the current conversion function set. */
219 __wcsmbs_clone_conv (struct gconv_fcts
*copy
)
221 const struct gconv_fcts
*orig
;
223 orig
= get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE
));
228 /* Now increment the usage counters.
229 Note: This assumes copy->*_nsteps == 1. */
230 if (copy
->towc
->__shlib_handle
!= NULL
)
231 ++copy
->towc
->__counter
;
232 if (copy
->tomb
->__shlib_handle
!= NULL
)
233 ++copy
->tomb
->__counter
;
237 /* Get converters for named charset. */
240 __wcsmbs_named_conv (struct gconv_fcts
*copy
, const char *name
)
242 copy
->towc
= __wcsmbs_getfct ("INTERNAL", name
, ©
->towc_nsteps
);
243 if (copy
->towc
== NULL
)
246 copy
->tomb
= __wcsmbs_getfct (name
, "INTERNAL", ©
->tomb_nsteps
);
247 if (copy
->tomb
== NULL
)
249 __gconv_close_transform (copy
->towc
, copy
->towc_nsteps
);
256 void internal_function
257 _nl_cleanup_ctype (struct __locale_data
*locale
)
259 const struct gconv_fcts
*const data
= locale
->private.ctype
;
262 locale
->private.ctype
= NULL
;
263 locale
->private.cleanup
= NULL
;
265 /* Free the old conversions. */
266 __gconv_close_transform (data
->tomb
, data
->tomb_nsteps
);
267 __gconv_close_transform (data
->towc
, data
->towc_nsteps
);
268 free ((char *) data
);