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gettext.h
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1 /* Convenience header for conditional use of GNU <libintl.h>.
2  Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009 Free Software Foundation, Inc.
3 
4  This program is free software; you can redistribute it and/or modify it
5  under the terms of the GNU General Public License as published
6  by 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 GNU
12  Library General Public License for more details.
13 
14  You should have received a copy of the GNU General Public
15  License along with this program; if not, write to the Free Software
16  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17  USA. */
18 
19 #ifndef _LIBGETTEXT_H
20 #define _LIBGETTEXT_H 1
21 
22 /* NLS can be disabled through the configure --disable-nls option. */
23 #if ENABLE_NLS
24 
25 /* Get declarations of GNU message catalog functions. */
26 # include <libintl.h>
27 
28 /* You can set the DEFAULT_TEXT_DOMAIN macro to specify the domain used by
29  the gettext() and ngettext() macros. This is an alternative to calling
30  textdomain(), and is useful for libraries. */
31 # ifdef DEFAULT_TEXT_DOMAIN
32 # undef gettext
33 # define gettext(Msgid) \
34  dgettext (DEFAULT_TEXT_DOMAIN, Msgid)
35 # undef ngettext
36 # define ngettext(Msgid1, Msgid2, N) \
37  dngettext (DEFAULT_TEXT_DOMAIN, Msgid1, Msgid2, N)
38 # endif
39 
40 #else
41 
42 /* Solaris /usr/include/locale.h includes /usr/include/libintl.h, which
43  chokes if dcgettext is defined as a macro. So include it now, to make
44  later inclusions of <locale.h> a NOP. We don't include <libintl.h>
45  as well because people using "gettext.h" will not include <libintl.h>,
46  and also including <libintl.h> would fail on SunOS 4, whereas <locale.h>
47  is OK. */
48 #if defined(__sun)
49 # include <locale.h>
50 #endif
51 
52 /* Many header files from the libstdc++ coming with g++ 3.3 or newer include
53  <libintl.h>, which chokes if dcgettext is defined as a macro. So include
54  it now, to make later inclusions of <libintl.h> a NOP. */
55 #if defined(__cplusplus) && defined(__GNUG__) && (__GNUC__ >= 3)
56 # include <cstdlib>
57 # if (__GLIBC__ >= 2) || _GLIBCXX_HAVE_LIBINTL_H
58 # include <libintl.h>
59 # endif
60 #endif
61 
62 /* Disabled NLS.
63  The casts to 'const char *' serve the purpose of producing warnings
64  for invalid uses of the value returned from these functions.
65  On pre-ANSI systems without 'const', the config.h file is supposed to
66  contain "#define const". */
67 # undef gettext
68 # define gettext(Msgid) ((const char *) (Msgid))
69 # undef dgettext
70 # define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
71 # undef dcgettext
72 # define dcgettext(Domainname, Msgid, Category) \
73  ((void) (Category), dgettext (Domainname, Msgid))
74 # undef ngettext
75 # define ngettext(Msgid1, Msgid2, N) \
76  ((N) == 1 \
77  ? ((void) (Msgid2), (const char *) (Msgid1)) \
78  : ((void) (Msgid1), (const char *) (Msgid2)))
79 # undef dngettext
80 # define dngettext(Domainname, Msgid1, Msgid2, N) \
81  ((void) (Domainname), ngettext (Msgid1, Msgid2, N))
82 # undef dcngettext
83 # define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
84  ((void) (Category), dngettext(Domainname, Msgid1, Msgid2, N))
85 # undef textdomain
86 # define textdomain(Domainname) ((const char *) (Domainname))
87 # undef bindtextdomain
88 # define bindtextdomain(Domainname, Dirname) \
89  ((void) (Domainname), (const char *) (Dirname))
90 # undef bind_textdomain_codeset
91 # define bind_textdomain_codeset(Domainname, Codeset) \
92  ((void) (Domainname), (const char *) (Codeset))
93 
94 #endif
95 
96 /* A pseudo function call that serves as a marker for the automated
97  extraction of messages, but does not call gettext(). The run-time
98  translation is done at a different place in the code.
99  The argument, String, should be a literal string. Concatenated strings
100  and other string expressions won't work.
101  The macro's expansion is not parenthesized, so that it is suitable as
102  initializer for static 'char[]' or 'const char[]' variables. */
103 #define gettext_noop(String) String
104 
105 /* The separator between msgctxt and msgid in a .mo file. */
106 #define GETTEXT_CONTEXT_GLUE "\004"
107 
108 /* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
109  MSGID. MSGCTXT and MSGID must be string literals. MSGCTXT should be
110  short and rarely need to change.
111  The letter 'p' stands for 'particular' or 'special'. */
112 #ifdef DEFAULT_TEXT_DOMAIN
113 # define pgettext(Msgctxt, Msgid) \
114  pgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
115 #else
116 # define pgettext(Msgctxt, Msgid) \
117  pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
118 #endif
119 #define dpgettext(Domainname, Msgctxt, Msgid) \
120  pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
121 #define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
122  pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
123 #ifdef DEFAULT_TEXT_DOMAIN
124 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
125  npgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
126 #else
127 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
128  npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
129 #endif
130 #define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
131  npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
132 #define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
133  npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
134 
135 #ifdef __GNUC__
136 __inline
137 #else
138 #ifdef __cplusplus
139 inline
140 #endif
141 #endif
142 static const char *
143 pgettext_aux (const char *domain,
144  const char *msg_ctxt_id, const char *msgid,
145  int category)
146 {
147  const char *translation = dcgettext (domain, msg_ctxt_id, category);
148  if (translation == msg_ctxt_id)
149  return msgid;
150  else
151  return translation;
152 }
153 
154 #ifdef __GNUC__
155 __inline
156 #else
157 #ifdef __cplusplus
158 inline
159 #endif
160 #endif
161 static const char *
162 npgettext_aux (const char *domain,
163  const char *msg_ctxt_id, const char *msgid,
164  const char *msgid_plural, unsigned long int n,
165  int category)
166 {
167  const char *translation =
168  dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
169  if (translation == msg_ctxt_id || translation == msgid_plural)
170  return (n == 1 ? msgid : msgid_plural);
171  else
172  return translation;
173 }
174 
175 /* The same thing extended for non-constant arguments. Here MSGCTXT and MSGID
176  can be arbitrary expressions. But for string literals these macros are
177  less efficient than those above. */
178 
179 #include <string.h>
180 
181 #define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS \
182  (((__GNUC__ >= 3 || __GNUG__ >= 2) && !__STRICT_ANSI__) \
183  /* || __STDC_VERSION__ >= 199901L */ )
184 
185 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
186 #include <stdlib.h>
187 #endif
188 
189 #define pgettext_expr(Msgctxt, Msgid) \
190  dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
191 #define dpgettext_expr(Domainname, Msgctxt, Msgid) \
192  dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
193 
194 #ifdef __GNUC__
195 __inline
196 #else
197 #ifdef __cplusplus
198 inline
199 #endif
200 #endif
201 static const char *
202 dcpgettext_expr (const char *domain,
203  const char *msgctxt, const char *msgid,
204  int category)
205 {
206  size_t msgctxt_len = strlen (msgctxt) + 1;
207  size_t msgid_len = strlen (msgid) + 1;
208  const char *translation;
209 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
210  char msg_ctxt_id[msgctxt_len + msgid_len];
211 #else
212  char buf[1024];
213  char *msg_ctxt_id =
214  (msgctxt_len + msgid_len <= sizeof (buf)
215  ? buf
216  : (char *) malloc (msgctxt_len + msgid_len));
217  if (msg_ctxt_id != NULL)
218 #endif
219  {
220  memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
221  msg_ctxt_id[msgctxt_len - 1] = '\004';
222  memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
223  translation = dcgettext (domain, msg_ctxt_id, category);
224 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
225  if (msg_ctxt_id != buf)
226  free (msg_ctxt_id);
227 #endif
228  if (translation != msg_ctxt_id)
229  return translation;
230  }
231  return msgid;
232 }
233 
234 #define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
235  dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
236 #define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
237  dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
238 
239 #ifdef __GNUC__
240 __inline
241 #else
242 #ifdef __cplusplus
243 inline
244 #endif
245 #endif
246 static const char *
247 dcnpgettext_expr (const char *domain,
248  const char *msgctxt, const char *msgid,
249  const char *msgid_plural, unsigned long int n,
250  int category)
251 {
252  size_t msgctxt_len = strlen (msgctxt) + 1;
253  size_t msgid_len = strlen (msgid) + 1;
254  const char *translation;
255 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
256  char msg_ctxt_id[msgctxt_len + msgid_len];
257 #else
258  char buf[1024];
259  char *msg_ctxt_id =
260  (msgctxt_len + msgid_len <= sizeof (buf)
261  ? buf
262  : (char *) malloc (msgctxt_len + msgid_len));
263  if (msg_ctxt_id != NULL)
264 #endif
265  {
266  memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
267  msg_ctxt_id[msgctxt_len - 1] = '\004';
268  memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
269  translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
270 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
271  if (msg_ctxt_id != buf)
272  free (msg_ctxt_id);
273 #endif
274  if (!(translation == msg_ctxt_id || translation == msgid_plural))
275  return translation;
276  }
277  return (n == 1 ? msgid : msgid_plural);
278 }
279 
280 #endif /* _LIBGETTEXT_H */
pgettext_aux
static const char * pgettext_aux(const char *domain, const char *msg_ctxt_id, const char *msgid, int category)
Definition: gettext.h:143
npgettext_aux
static const char * npgettext_aux(const char *domain, const char *msg_ctxt_id, const char *msgid, const char *msgid_plural, unsigned long int n, int category)
Definition: gettext.h:162
dcgettext
#define dcgettext(Domainname, Msgid, Category)
Definition: gettext.h:72
dcngettext
#define dcngettext(Domainname, Msgid1, Msgid2, N, Category)
Definition: gettext.h:83
dcpgettext_expr
static const char * dcpgettext_expr(const char *domain, const char *msgctxt, const char *msgid, int category)
Definition: gettext.h:202
dcnpgettext_expr
static const char * dcnpgettext_expr(const char *domain, const char *msgctxt, const char *msgid, const char *msgid_plural, unsigned long int n, int category)
Definition: gettext.h:247