intl/libgnuintl.h

   1 /* Message catalogs for internationalization.
   2    Copyright (C) 1995-1997, 2000-2003 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 Library General Public License as published
   6    by the Free Software Foundation; either version 2, 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 Library General Public
  15    License along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17    USA.  */
  18
  19 #ifndef _LIBINTL_H
  20 #define _LIBINTL_H      1
  21
  22 #include <locale.h>
  23
  24 /* The LC_MESSAGES locale category is the category used by the functions
  25    gettext() and dgettext().  It is specified in POSIX, but not in ANSI C.
  26    On systems that don't define it, use an arbitrary value instead.
  27    On Solaris, <locale.h> defines __LOCALE_H (or _LOCALE_H in Solaris 2.5)
  28    then includes <libintl.h> (i.e. this file!) and then only defines
  29    LC_MESSAGES.  To avoid a redefinition warning, don't define LC_MESSAGES
  30    in this case.  */
  31 #if !defined LC_MESSAGES && !(defined __LOCALE_H || (defined _LOCALE_H && defined __sun))
  32 # define LC_MESSAGES 1729
  33 #endif
  34
  35 /* We define an additional symbol to signal that we use the GNU
  36    implementation of gettext.  */
  37 #define __USE_GNU_GETTEXT 1
  38
  39 /* Provide information about the supported file formats.  Returns the
  40    maximum minor revision number supported for a given major revision.  */
  41 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) \
  42   ((major) == 0 ? 1 : -1)
  43
  44 /* Resolve a platform specific conflict on DJGPP.  GNU gettext takes
  45    precedence over _conio_gettext.  */
  46 #ifdef __DJGPP__
  47 # undef gettext
  48 #endif
  49
  50 /* Use _INTL_PARAMS, not PARAMS, in order to avoid clashes with identifiers
  51    used by programs.  Similarly, test __PROTOTYPES, not PROTOTYPES.  */
  52 #ifndef _INTL_PARAMS
  53 # if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES
  54 #  define _INTL_PARAMS(args) args
  55 # else
  56 #  define _INTL_PARAMS(args) ()
  57 # endif
  58 #endif
  59
  60 #ifdef __cplusplus
  61 extern "C" {
  62 #endif
  63
  64
  65 /* We redirect the functions to those prefixed with "libintl_".  This is
  66    necessary, because some systems define gettext/textdomain/... in the C
  67    library (namely, Solaris 2.4 and newer, and GNU libc 2.0 and newer).
  68    If we used the unprefixed names, there would be cases where the
  69    definition in the C library would override the one in the libintl.so
  70    shared library.  Recall that on ELF systems, the symbols are looked
  71    up in the following order:
  72      1. in the executable,
  73      2. in the shared libraries specified on the link command line, in order,
  74      3. in the dependencies of the shared libraries specified on the link
  75         command line,
  76      4. in the dlopen()ed shared libraries, in the order in which they were
  77         dlopen()ed.
  78    The definition in the C library would override the one in libintl.so if
  79    either
  80      * -lc is given on the link command line and -lintl isn't, or
  81      * -lc is given on the link command line before -lintl, or
  82      * libintl.so is a dependency of a dlopen()ed shared library but not
  83        linked to the executable at link time.
  84    Since Solaris gettext() behaves differently than GNU gettext(), this
  85    would be unacceptable.
  86
  87    The redirection happens by default through macros in C, so that &gettext
  88    is independent of the compilation unit, but through inline functions in
  89    C++, in order not to interfere with the name mangling of class fields or
  90    class methods called 'gettext'.  */
  91
  92 /* The user can define _INTL_REDIRECT_INLINE or _INTL_REDIRECT_MACROS.
  93    If he doesn't, we choose the method.  A third possible method is
  94    _INTL_REDIRECT_ASM, supported only by GCC.  */
  95 #if !(defined _INTL_REDIRECT_INLINE || defined _INTL_REDIRECT_MACROS)
  96 # if __GNUC__ >= 2 && !defined __APPLE_CC__ && (defined __STDC__ || defined __cplusplus)
  97 #  define _INTL_REDIRECT_ASM
  98 # else
  99 #  ifdef __cplusplus
 100 #   define _INTL_REDIRECT_INLINE
 101 #  else
 102 #   define _INTL_REDIRECT_MACROS
 103 #  endif
 104 # endif
 105 #endif
 106 /* Auxiliary macros.  */
 107 #ifdef _INTL_REDIRECT_ASM
 108 # define _INTL_ASM(cname) __asm__ (_INTL_ASMNAME (__USER_LABEL_PREFIX__, #cname))
 109 # define _INTL_ASMNAME(prefix,cnamestring) _INTL_STRINGIFY (prefix) cnamestring
 110 # define _INTL_STRINGIFY(prefix) #prefix
 111 #else
 112 # define _INTL_ASM(cname)
 113 #endif
 114
 115 /* Look up MSGID in the current default message catalog for the current
 116    LC_MESSAGES locale.  If not found, returns MSGID itself (the default
 117    text).  */
 118 #ifdef _INTL_REDIRECT_INLINE
 119 extern char *libintl_gettext (const char *__msgid);
 120 static inline char *gettext (const char *__msgid)
 121 {
 122   return libintl_gettext (__msgid);
 123 }
 124 #else
 125 #ifdef _INTL_REDIRECT_MACROS
 126 # define gettext libintl_gettext
 127 #endif
 128 extern char *gettext _INTL_PARAMS ((const char *__msgid))
 129        _INTL_ASM (libintl_gettext);
 130 #endif
 131
 132 /* Look up MSGID in the DOMAINNAME message catalog for the current
 133    LC_MESSAGES locale.  */
 134 #ifdef _INTL_REDIRECT_INLINE
 135 extern char *libintl_dgettext (const char *__domainname, const char *__msgid);
 136 static inline char *dgettext (const char *__domainname, const char *__msgid)
 137 {
 138   return libintl_dgettext (__domainname, __msgid);
 139 }
 140 #else
 141 #ifdef _INTL_REDIRECT_MACROS
 142 # define dgettext libintl_dgettext
 143 #endif
 144 extern char *dgettext _INTL_PARAMS ((const char *__domainname,
 145                                      const char *__msgid))
 146        _INTL_ASM (libintl_dgettext);
 147 #endif
 148
 149 /* Look up MSGID in the DOMAINNAME message catalog for the current CATEGORY
 150    locale.  */
 151 #ifdef _INTL_REDIRECT_INLINE
 152 extern char *libintl_dcgettext (const char *__domainname, const char *__msgid,
 153                                 int __category);
 154 static inline char *dcgettext (const char *__domainname, const char *__msgid,
 155                                int __category)
 156 {
 157   return libintl_dcgettext (__domainname, __msgid, __category);
 158 }
 159 #else
 160 #ifdef _INTL_REDIRECT_MACROS
 161 # define dcgettext libintl_dcgettext
 162 #endif
 163 extern char *dcgettext _INTL_PARAMS ((const char *__domainname,
 164                                       const char *__msgid,
 165                                       int __category))
 166        _INTL_ASM (libintl_dcgettext);
 167 #endif
 168
 169
 170 /* Similar to `gettext' but select the plural form corresponding to the
 171    number N.  */
 172 #ifdef _INTL_REDIRECT_INLINE
 173 extern char *libintl_ngettext (const char *__msgid1, const char *__msgid2,
 174                                unsigned long int __n);
 175 static inline char *ngettext (const char *__msgid1, const char *__msgid2,
 176                               unsigned long int __n)
 177 {
 178   return libintl_ngettext (__msgid1, __msgid2, __n);
 179 }
 180 #else
 181 #ifdef _INTL_REDIRECT_MACROS
 182 # define ngettext libintl_ngettext
 183 #endif
 184 extern char *ngettext _INTL_PARAMS ((const char *__msgid1,
 185                                      const char *__msgid2,
 186                                      unsigned long int __n))
 187        _INTL_ASM (libintl_ngettext);
 188 #endif
 189
 190 /* Similar to `dgettext' but select the plural form corresponding to the
 191    number N.  */
 192 #ifdef _INTL_REDIRECT_INLINE
 193 extern char *libintl_dngettext (const char *__domainname, const char *__msgid1,
 194                                 const char *__msgid2, unsigned long int __n);
 195 static inline char *dngettext (const char *__domainname, const char *__msgid1,
 196                                const char *__msgid2, unsigned long int __n)
 197 {
 198   return libintl_dngettext (__domainname, __msgid1, __msgid2, __n);
 199 }
 200 #else
 201 #ifdef _INTL_REDIRECT_MACROS
 202 # define dngettext libintl_dngettext
 203 #endif
 204 extern char *dngettext _INTL_PARAMS ((const char *__domainname,
 205                                       const char *__msgid1,
 206                                       const char *__msgid2,
 207                                       unsigned long int __n))
 208        _INTL_ASM (libintl_dngettext);
 209 #endif
 210
 211 /* Similar to `dcgettext' but select the plural form corresponding to the
 212    number N.  */
 213 #ifdef _INTL_REDIRECT_INLINE
 214 extern char *libintl_dcngettext (const char *__domainname,
 215                                  const char *__msgid1, const char *__msgid2,
 216                                  unsigned long int __n, int __category);
 217 static inline char *dcngettext (const char *__domainname,
 218                                 const char *__msgid1, const char *__msgid2,
 219                                 unsigned long int __n, int __category)
 220 {
 221   return libintl_dcngettext (__domainname, __msgid1, __msgid2, __n, __category);
 222 }
 223 #else
 224 #ifdef _INTL_REDIRECT_MACROS
 225 # define dcngettext libintl_dcngettext
 226 #endif
 227 extern char *dcngettext _INTL_PARAMS ((const char *__domainname,
 228                                        const char *__msgid1,
 229                                        const char *__msgid2,
 230                                        unsigned long int __n,
 231                                        int __category))
 232        _INTL_ASM (libintl_dcngettext);
 233 #endif
 234
 235
 236 /* Set the current default message catalog to DOMAINNAME.
 237    If DOMAINNAME is null, return the current default.
 238    If DOMAINNAME is "", reset to the default of "messages".  */
 239 #ifdef _INTL_REDIRECT_INLINE
 240 extern char *libintl_textdomain (const char *__domainname);
 241 static inline char *textdomain (const char *__domainname)
 242 {
 243   return libintl_textdomain (__domainname);
 244 }
 245 #else
 246 #ifdef _INTL_REDIRECT_MACROS
 247 # define textdomain libintl_textdomain
 248 #endif
 249 extern char *textdomain _INTL_PARAMS ((const char *__domainname))
 250        _INTL_ASM (libintl_textdomain);
 251 #endif
 252
 253 /* Specify that the DOMAINNAME message catalog will be found
 254    in DIRNAME rather than in the system locale data base.  */
 255 #ifdef _INTL_REDIRECT_INLINE
 256 extern char *libintl_bindtextdomain (const char *__domainname,
 257                                      const char *__dirname);
 258 static inline char *bindtextdomain (const char *__domainname,
 259                                     const char *__dirname)
 260 {
 261   return libintl_bindtextdomain (__domainname, __dirname);
 262 }
 263 #else
 264 #ifdef _INTL_REDIRECT_MACROS
 265 # define bindtextdomain libintl_bindtextdomain
 266 #endif
 267 extern char *bindtextdomain _INTL_PARAMS ((const char *__domainname,
 268                                            const char *__dirname))
 269        _INTL_ASM (libintl_bindtextdomain);
 270 #endif
 271
 272 /* Specify the character encoding in which the messages from the
 273    DOMAINNAME message catalog will be returned.  */
 274 #ifdef _INTL_REDIRECT_INLINE
 275 extern char *libintl_bind_textdomain_codeset (const char *__domainname,
 276                                               const char *__codeset);
 277 static inline char *bind_textdomain_codeset (const char *__domainname,
 278                                              const char *__codeset)
 279 {
 280   return libintl_bind_textdomain_codeset (__domainname, __codeset);
 281 }
 282 #else
 283 #ifdef _INTL_REDIRECT_MACROS
 284 # define bind_textdomain_codeset libintl_bind_textdomain_codeset
 285 #endif
 286 extern char *bind_textdomain_codeset _INTL_PARAMS ((const char *__domainname,
 287                                                     const char *__codeset))
 288        _INTL_ASM (libintl_bind_textdomain_codeset);
 289 #endif
 290
 291
 292 /* Support for relocatable packages.  */
 293
 294 /* Sets the original and the current installation prefix of the package.
 295    Relocation simply replaces a pathname starting with the original prefix
 296    by the corresponding pathname with the current prefix instead.  Both
 297    prefixes should be directory names without trailing slash (i.e. use ""
 298    instead of "/").  */
 299 #define libintl_set_relocation_prefix libintl_set_relocation_prefix
 300 extern void
 301        libintl_set_relocation_prefix _INTL_PARAMS ((const char *orig_prefix,
 302                                                     const char *curr_prefix));
 303
 304
 305 #ifdef __cplusplus
 306 }
 307 #endif
 308
 309 #endif /* libintl.h */