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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
  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 /* _INTL_MAY_RETURN_STRING_ARG(n) declares that the given function may return
 116    its n-th argument literally.  This enables GCC to warn for example about
 117    printf (gettext ("foo %y")).  */
 118 #if __GNUC__ >= 3 && !(__APPLE_CC__ > 1 && defined __cplusplus)
 119 # define _INTL_MAY_RETURN_STRING_ARG(n) __attribute__ ((__format_arg__ (n)))
 120 #else
 121 # define _INTL_MAY_RETURN_STRING_ARG(n)
 122 #endif
 123
 124 /* Look up MSGID in the current default message catalog for the current
 125    LC_MESSAGES locale.  If not found, returns MSGID itself (the default
 126    text).  */
 127 #ifdef _INTL_REDIRECT_INLINE
 128 extern char *libintl_gettext (const char *__msgid)
 129        _INTL_MAY_RETURN_STRING_ARG (1);
 130 static inline char *gettext (const char *__msgid)
 131 {
 132   return libintl_gettext (__msgid);
 133 }
 134 #else
 135 #ifdef _INTL_REDIRECT_MACROS
 136 # define gettext libintl_gettext
 137 #endif
 138 extern char *gettext _INTL_PARAMS ((const char *__msgid))
 139        _INTL_ASM (libintl_gettext)
 140        _INTL_MAY_RETURN_STRING_ARG (1);
 141 #endif
 142
 143 /* Look up MSGID in the DOMAINNAME message catalog for the current
 144    LC_MESSAGES locale.  */
 145 #ifdef _INTL_REDIRECT_INLINE
 146 extern char *libintl_dgettext (const char *__domainname, const char *__msgid)
 147        _INTL_MAY_RETURN_STRING_ARG (2);
 148 static inline char *dgettext (const char *__domainname, const char *__msgid)
 149 {
 150   return libintl_dgettext (__domainname, __msgid);
 151 }
 152 #else
 153 #ifdef _INTL_REDIRECT_MACROS
 154 # define dgettext libintl_dgettext
 155 #endif
 156 extern char *dgettext _INTL_PARAMS ((const char *__domainname,
 157                                      const char *__msgid))
 158        _INTL_ASM (libintl_dgettext)
 159        _INTL_MAY_RETURN_STRING_ARG (2);
 160 #endif
 161
 162 /* Look up MSGID in the DOMAINNAME message catalog for the current CATEGORY
 163    locale.  */
 164 #ifdef _INTL_REDIRECT_INLINE
 165 extern char *libintl_dcgettext (const char *__domainname, const char *__msgid,
 166                                 int __category)
 167        _INTL_MAY_RETURN_STRING_ARG (2);
 168 static inline char *dcgettext (const char *__domainname, const char *__msgid,
 169                                int __category)
 170 {
 171   return libintl_dcgettext (__domainname, __msgid, __category);
 172 }
 173 #else
 174 #ifdef _INTL_REDIRECT_MACROS
 175 # define dcgettext libintl_dcgettext
 176 #endif
 177 extern char *dcgettext _INTL_PARAMS ((const char *__domainname,
 178                                       const char *__msgid,
 179                                       int __category))
 180        _INTL_ASM (libintl_dcgettext)
 181        _INTL_MAY_RETURN_STRING_ARG (2);
 182 #endif
 183
 184
 185 /* Similar to `gettext' but select the plural form corresponding to the
 186    number N.  */
 187 #ifdef _INTL_REDIRECT_INLINE
 188 extern char *libintl_ngettext (const char *__msgid1, const char *__msgid2,
 189                                unsigned long int __n)
 190        _INTL_MAY_RETURN_STRING_ARG (1) _INTL_MAY_RETURN_STRING_ARG (2);
 191 static inline char *ngettext (const char *__msgid1, const char *__msgid2,
 192                               unsigned long int __n)
 193 {
 194   return libintl_ngettext (__msgid1, __msgid2, __n);
 195 }
 196 #else
 197 #ifdef _INTL_REDIRECT_MACROS
 198 # define ngettext libintl_ngettext
 199 #endif
 200 extern char *ngettext _INTL_PARAMS ((const char *__msgid1,
 201                                      const char *__msgid2,
 202                                      unsigned long int __n))
 203        _INTL_ASM (libintl_ngettext)
 204        _INTL_MAY_RETURN_STRING_ARG (1) _INTL_MAY_RETURN_STRING_ARG (2);
 205 #endif
 206
 207 /* Similar to `dgettext' but select the plural form corresponding to the
 208    number N.  */
 209 #ifdef _INTL_REDIRECT_INLINE
 210 extern char *libintl_dngettext (const char *__domainname, const char *__msgid1,
 211                                 const char *__msgid2, unsigned long int __n)
 212        _INTL_MAY_RETURN_STRING_ARG (2) _INTL_MAY_RETURN_STRING_ARG (3);
 213 static inline char *dngettext (const char *__domainname, const char *__msgid1,
 214                                const char *__msgid2, unsigned long int __n)
 215 {
 216   return libintl_dngettext (__domainname, __msgid1, __msgid2, __n);
 217 }
 218 #else
 219 #ifdef _INTL_REDIRECT_MACROS
 220 # define dngettext libintl_dngettext
 221 #endif
 222 extern char *dngettext _INTL_PARAMS ((const char *__domainname,
 223                                       const char *__msgid1,
 224                                       const char *__msgid2,
 225                                       unsigned long int __n))
 226        _INTL_ASM (libintl_dngettext)
 227        _INTL_MAY_RETURN_STRING_ARG (2) _INTL_MAY_RETURN_STRING_ARG (3);
 228 #endif
 229
 230 /* Similar to `dcgettext' but select the plural form corresponding to the
 231    number N.  */
 232 #ifdef _INTL_REDIRECT_INLINE
 233 extern char *libintl_dcngettext (const char *__domainname,
 234                                  const char *__msgid1, const char *__msgid2,
 235                                  unsigned long int __n, int __category)
 236        _INTL_MAY_RETURN_STRING_ARG (2) _INTL_MAY_RETURN_STRING_ARG (3);
 237 static inline char *dcngettext (const char *__domainname,
 238                                 const char *__msgid1, const char *__msgid2,
 239                                 unsigned long int __n, int __category)
 240 {
 241   return libintl_dcngettext (__domainname, __msgid1, __msgid2, __n, __category);
 242 }
 243 #else
 244 #ifdef _INTL_REDIRECT_MACROS
 245 # define dcngettext libintl_dcngettext
 246 #endif
 247 extern char *dcngettext _INTL_PARAMS ((const char *__domainname,
 248                                        const char *__msgid1,
 249                                        const char *__msgid2,
 250                                        unsigned long int __n,
 251                                        int __category))
 252        _INTL_ASM (libintl_dcngettext)
 253        _INTL_MAY_RETURN_STRING_ARG (2) _INTL_MAY_RETURN_STRING_ARG (3);
 254 #endif
 255
 256
 257 /* Set the current default message catalog to DOMAINNAME.
 258    If DOMAINNAME is null, return the current default.
 259    If DOMAINNAME is "", reset to the default of "messages".  */
 260 #ifdef _INTL_REDIRECT_INLINE
 261 extern char *libintl_textdomain (const char *__domainname);
 262 static inline char *textdomain (const char *__domainname)
 263 {
 264   return libintl_textdomain (__domainname);
 265 }
 266 #else
 267 #ifdef _INTL_REDIRECT_MACROS
 268 # define textdomain libintl_textdomain
 269 #endif
 270 extern char *textdomain _INTL_PARAMS ((const char *__domainname))
 271        _INTL_ASM (libintl_textdomain);
 272 #endif
 273
 274 /* Specify that the DOMAINNAME message catalog will be found
 275    in DIRNAME rather than in the system locale data base.  */
 276 #ifdef _INTL_REDIRECT_INLINE
 277 extern char *libintl_bindtextdomain (const char *__domainname,
 278                                      const char *__dirname);
 279 static inline char *bindtextdomain (const char *__domainname,
 280                                     const char *__dirname)
 281 {
 282   return libintl_bindtextdomain (__domainname, __dirname);
 283 }
 284 #else
 285 #ifdef _INTL_REDIRECT_MACROS
 286 # define bindtextdomain libintl_bindtextdomain
 287 #endif
 288 extern char *bindtextdomain _INTL_PARAMS ((const char *__domainname,
 289                                            const char *__dirname))
 290        _INTL_ASM (libintl_bindtextdomain);
 291 #endif
 292
 293 /* Specify the character encoding in which the messages from the
 294    DOMAINNAME message catalog will be returned.  */
 295 #ifdef _INTL_REDIRECT_INLINE
 296 extern char *libintl_bind_textdomain_codeset (const char *__domainname,
 297                                               const char *__codeset);
 298 static inline char *bind_textdomain_codeset (const char *__domainname,
 299                                              const char *__codeset)
 300 {
 301   return libintl_bind_textdomain_codeset (__domainname, __codeset);
 302 }
 303 #else
 304 #ifdef _INTL_REDIRECT_MACROS
 305 # define bind_textdomain_codeset libintl_bind_textdomain_codeset
 306 #endif
 307 extern char *bind_textdomain_codeset _INTL_PARAMS ((const char *__domainname,
 308                                                     const char *__codeset))
 309        _INTL_ASM (libintl_bind_textdomain_codeset);
 310 #endif
 311
 312
 313 /* Support for relocatable packages.  */
 314
 315 /* Sets the original and the current installation prefix of the package.
 316    Relocation simply replaces a pathname starting with the original prefix
 317    by the corresponding pathname with the current prefix instead.  Both
 318    prefixes should be directory names without trailing slash (i.e. use ""
 319    instead of "/").  */
 320 #define libintl_set_relocation_prefix libintl_set_relocation_prefix
 321 extern void
 322        libintl_set_relocation_prefix _INTL_PARAMS ((const char *orig_prefix,
 323                                                     const char *curr_prefix));
 324
 325
 326 #ifdef __cplusplus
 327 }
 328 #endif
 329
 330 #endif /* libintl.h */