intl/libintl.h

   1 /* Message catalogs for internationalization.
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1995.
   4    This file is derived from the file libgettext.h in the GNU gettext package.
   5
   6    This file is part of the GNU C Library.  Its master source is NOT part of
   7    the C library, however.
   8
   9    The GNU C Library is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU Library General Public License as
  11    published by the Free Software Foundation; either version 2 of the
  12    License, or (at your option) any later version.
  13
  14    The GNU C Library is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    Library General Public License for more details.
  18
  19    You should have received a copy of the GNU Library General Public
  20    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  21    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #ifndef _LIBINTL_H
  25 #define _LIBINTL_H      1
  26
  27 #include <features.h>
  28
  29 /* We define an additional symbol to signal that we use the GNU
  30    implementation of gettext.  */
  31 #define __USE_GNU_GETTEXT 1
  32
  33 __BEGIN_DECLS
  34
  35 /* Look up MSGID in the current default message catalog for the current
  36    LC_MESSAGES locale.  If not found, returns MSGID itself (the default
  37    text).  */
  38 extern char *gettext (__const char *__msgid) __THROW;
  39
  40 /* Look up MSGID in the DOMAINNAME message catalog for the current
  41    LC_MESSAGES locale.  */
  42 extern char *dgettext (__const char *__domainname,
  43                        __const char *__msgid) __THROW;
  44 extern char *__dgettext (__const char *__domainname,
  45                          __const char *__msgid) __THROW;
  46
  47 /* Look up MSGID in the DOMAINNAME message catalog for the current CATEGORY
  48    locale.  */
  49 extern char *dcgettext (__const char *__domainname,
  50                         __const char *__msgid, int __category) __THROW;
  51 extern char *__dcgettext (__const char *__domainname,
  52                           __const char *__msgid, int __category) __THROW;
  53
  54
  55 /* Set the current default message catalog to DOMAINNAME.
  56    If DOMAINNAME is null, return the current default.
  57    If DOMAINNAME is "", reset to the default of "messages".  */
  58 extern char *textdomain (__const char *__domainname) __THROW;
  59
  60 /* Specify that the DOMAINNAME message catalog will be found
  61    in DIRNAME rather than in the system locale data base.  */
  62 extern char *bindtextdomain (__const char *__domainname,
  63                              __const char *__dirname) __THROW;
  64
  65
  66 /* Optimized version of the function above.  */
  67 #if defined __OPTIMIZE__
  68
  69 /* We need NULL for `gettext'.  */
  70 # define __need_NULL
  71 # include <stddef.h>
  72
  73 /* We need LC_MESSAGES for `dgettext'.  */
  74 # include <locale.h>
  75
  76 /* These must be macros.  Inlined functions are useless because the
  77    `__builtin_constant_p' predicate in dcgettext would always return
  78    false.  */
  79
  80 # define gettext(msgid) dgettext (NULL, msgid)
  81
  82 # define dgettext(domainname, msgid)                                          \
  83   dcgettext (domainname, msgid, LC_MESSAGES)
  84
  85 # if __GNUC_PREREQ (2,7)
  86 /* Variable defined in loadmsgcat.c which gets incremented every time a
  87    new catalog is loaded.  */
  88 extern int _nl_msg_cat_cntr;
  89
  90 #  define dcgettext(domainname, msgid, category)                              \
  91   (__extension__                                                              \
  92    ({                                                                         \
  93      char *__result;                                                          \
  94      if (__builtin_constant_p (msgid))                                        \
  95        {                                                                      \
  96          static char *__translation__;                                        \
  97          static int __catalog_counter__;                                      \
  98          if (! __translation__ || __catalog_counter__ != _nl_msg_cat_cntr)    \
  99            {                                                                  \
 100              __translation__ =                                                \
 101                __dcgettext ((domainname), (msgid), (category));               \
 102              __catalog_counter__ = _nl_msg_cat_cntr;                          \
 103            }                                                                  \
 104          __result = __translation__;                                          \
 105        }                                                                      \
 106      else                                                                     \
 107        __result = __dcgettext ((domainname), (msgid), (category));            \
 108      __result;                                                                \
 109     }))
 110 # endif
 111 #endif /* Optimizing. */
 112
 113
 114 __END_DECLS
 115
 116 #endif /* libintl.h */