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comparison lib/gettext.h @ 272:d5392bb5da3c 2.5

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1 /* Convenience header for conditional use of GNU <libintl.h>.
2 Copyright (C) 1995-1998, 2000-2002, 2004-2006 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17
18 #ifndef _LIBGETTEXT_H
19 #define _LIBGETTEXT_H 1
20
21 /* NLS can be disabled through the configure --disable-nls option. */
22 #if ENABLE_NLS
23
24 /* Get declarations of GNU message catalog functions. */
25 # include <libintl.h>
26
27 /* You can set the DEFAULT_TEXT_DOMAIN macro to specify the domain used by
28 the gettext() and ngettext() macros. This is an alternative to calling
29 textdomain(), and is useful for libraries. */
30 # ifdef DEFAULT_TEXT_DOMAIN
31 # undef gettext
32 # define gettext(Msgid) \
33 dgettext (DEFAULT_TEXT_DOMAIN, Msgid)
34 # undef ngettext
35 # define ngettext(Msgid1, Msgid2, N) \
36 dngettext (DEFAULT_TEXT_DOMAIN, Msgid1, Msgid2, N)
37 # endif
38
39 #else
40
41 /* Solaris /usr/include/locale.h includes /usr/include/libintl.h, which
42 chokes if dcgettext is defined as a macro. So include it now, to make
43 later inclusions of <locale.h> a NOP. We don't include <libintl.h>
44 as well because people using "gettext.h" will not include <libintl.h>,
45 and also including <libintl.h> would fail on SunOS 4, whereas <locale.h>
46 is OK. */
47 #if defined(__sun)
48 # include <locale.h>
49 #endif
50
51 /* Many header files from the libstdc++ coming with g++ 3.3 or newer include
52 <libintl.h>, which chokes if dcgettext is defined as a macro. So include
53 it now, to make later inclusions of <libintl.h> a NOP. */
54 #if defined(__cplusplus) && defined(__GNUG__) && (__GNUC__ >= 3)
55 # include <cstdlib>
56 # if (__GLIBC__ >= 2) || _GLIBCXX_HAVE_LIBINTL_H
57 # include <libintl.h>
58 # endif
59 #endif
60
61 /* Disabled NLS.
62 The casts to 'const char *' serve the purpose of producing warnings
63 for invalid uses of the value returned from these functions.
64 On pre-ANSI systems without 'const', the config.h file is supposed to
65 contain "#define const". */
66 # define gettext(Msgid) ((const char *) (Msgid))
67 # define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
68 # define dcgettext(Domainname, Msgid, Category) \
69 ((void) (Category), dgettext (Domainname, Msgid))
70 # define ngettext(Msgid1, Msgid2, N) \
71 ((N) == 1 \
72 ? ((void) (Msgid2), (const char *) (Msgid1)) \
73 : ((void) (Msgid1), (const char *) (Msgid2)))
74 # define dngettext(Domainname, Msgid1, Msgid2, N) \
75 ((void) (Domainname), ngettext (Msgid1, Msgid2, N))
76 # define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
77 ((void) (Category), dngettext(Domainname, Msgid1, Msgid2, N))
78 # define textdomain(Domainname) ((const char *) (Domainname))
79 # define bindtextdomain(Domainname, Dirname) \
80 ((void) (Domainname), (const char *) (Dirname))
81 # define bind_textdomain_codeset(Domainname, Codeset) \
82 ((void) (Domainname), (const char *) (Codeset))
83
84 #endif
85
86 /* A pseudo function call that serves as a marker for the automated
87 extraction of messages, but does not call gettext(). The run-time
88 translation is done at a different place in the code.
89 The argument, String, should be a literal string. Concatenated strings
90 and other string expressions won't work.
91 The macro's expansion is not parenthesized, so that it is suitable as
92 initializer for static 'char[]' or 'const char[]' variables. */
93 #define gettext_noop(String) String
94
95 /* The separator between msgctxt and msgid in a .mo file. */
96 #define GETTEXT_CONTEXT_GLUE "\004"
97
98 /* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
99 MSGID. MSGCTXT and MSGID must be string literals. MSGCTXT should be
100 short and rarely need to change.
101 The letter 'p' stands for 'particular' or 'special'. */
102 #ifdef DEFAULT_TEXT_DOMAIN
103 # define pgettext(Msgctxt, Msgid) \
104 pgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
105 #else
106 # define pgettext(Msgctxt, Msgid) \
107 pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
108 #endif
109 #define dpgettext(Domainname, Msgctxt, Msgid) \
110 pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
111 #define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
112 pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
113 #ifdef DEFAULT_TEXT_DOMAIN
114 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
115 npgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
116 #else
117 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
118 npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
119 #endif
120 #define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
121 npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
122 #define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
123 npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
124
125 #ifdef __GNUC__
126 __inline
127 #else
128 #ifdef __cplusplus
129 inline
130 #endif
131 #endif
132 static const char *
133 pgettext_aux (const char *domain,
134 const char *msg_ctxt_id, const char *msgid,
135 int category)
136 {
137 const char *translation = dcgettext (domain, msg_ctxt_id, category);
138 if (translation == msg_ctxt_id)
139 return msgid;
140 else
141 return translation;
142 }
143
144 #ifdef __GNUC__
145 __inline
146 #else
147 #ifdef __cplusplus
148 inline
149 #endif
150 #endif
151 static const char *
152 npgettext_aux (const char *domain,
153 const char *msg_ctxt_id, const char *msgid,
154 const char *msgid_plural, unsigned long int n,
155 int category)
156 {
157 const char *translation =
158 dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
159 if (translation == msg_ctxt_id || translation == msgid_plural)
160 return (n == 1 ? msgid : msgid_plural);
161 else
162 return translation;
163 }
164
165 /* The same thing extended for non-constant arguments. Here MSGCTXT and MSGID
166 can be arbitrary expressions. But for string literals these macros are
167 less efficient than those above. */
168
169 #include <string.h>
170
171 #define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS \
172 (((__GNUC__ >= 3 || __GNUG__ >= 2) && !__STRICT_ANSI__) \
173 /* || __STDC_VERSION__ >= 199901L */ )
174
175 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
176 #include <stdlib.h>
177 #endif
178
179 #define pgettext_expr(Msgctxt, Msgid) \
180 dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
181 #define dpgettext_expr(Domainname, Msgctxt, Msgid) \
182 dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
183
184 #ifdef __GNUC__
185 __inline
186 #else
187 #ifdef __cplusplus
188 inline
189 #endif
190 #endif
191 static const char *
192 dcpgettext_expr (const char *domain,
193 const char *msgctxt, const char *msgid,
194 int category)
195 {
196 size_t msgctxt_len = strlen (msgctxt) + 1;
197 size_t msgid_len = strlen (msgid) + 1;
198 const char *translation;
199 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
200 char msg_ctxt_id[msgctxt_len + msgid_len];
201 #else
202 char buf[1024];
203 char *msg_ctxt_id =
204 (msgctxt_len + msgid_len <= sizeof (buf)
205 ? buf
206 : (char *) malloc (msgctxt_len + msgid_len));
207 if (msg_ctxt_id != NULL)
208 #endif
209 {
210 memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
211 msg_ctxt_id[msgctxt_len - 1] = '\004';
212 memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
213 translation = dcgettext (domain, msg_ctxt_id, category);
214 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
215 if (msg_ctxt_id != buf)
216 free (msg_ctxt_id);
217 #endif
218 if (translation != msg_ctxt_id)
219 return translation;
220 }
221 return msgid;
222 }
223
224 #define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
225 dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
226 #define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
227 dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
228
229 #ifdef __GNUC__
230 __inline
231 #else
232 #ifdef __cplusplus
233 inline
234 #endif
235 #endif
236 static const char *
237 dcnpgettext_expr (const char *domain,
238 const char *msgctxt, const char *msgid,
239 const char *msgid_plural, unsigned long int n,
240 int category)
241 {
242 size_t msgctxt_len = strlen (msgctxt) + 1;
243 size_t msgid_len = strlen (msgid) + 1;
244 const char *translation;
245 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
246 char msg_ctxt_id[msgctxt_len + msgid_len];
247 #else
248 char buf[1024];
249 char *msg_ctxt_id =
250 (msgctxt_len + msgid_len <= sizeof (buf)
251 ? buf
252 : (char *) malloc (msgctxt_len + msgid_len));
253 if (msg_ctxt_id != NULL)
254 #endif
255 {
256 memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
257 msg_ctxt_id[msgctxt_len - 1] = '\004';
258 memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
259 translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
260 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
261 if (msg_ctxt_id != buf)
262 free (msg_ctxt_id);
263 #endif
264 if (!(translation == msg_ctxt_id || translation == msgid_plural))
265 return translation;
266 }
267 return (n == 1 ? msgid : msgid_plural);
268 }
269
270 #endif /* _LIBGETTEXT_H */