lib/gettext.h

   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
   5    it under the terms of the GNU Lesser General Public License as published by
   6    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
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser 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 # undef gettext
  67 # define gettext(Msgid) ((const char *) (Msgid))
  68 # undef dgettext
  69 # define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
  70 # undef dcgettext
  71 # define dcgettext(Domainname, Msgid, Category) \
  72     ((void) (Category), dgettext (Domainname, Msgid))
  73 # undef ngettext
  74 # define ngettext(Msgid1, Msgid2, N) \
  75     ((N) == 1 \
  76      ? ((void) (Msgid2), (const char *) (Msgid1)) \
  77      : ((void) (Msgid1), (const char *) (Msgid2)))
  78 # undef dngettext
  79 # define dngettext(Domainname, Msgid1, Msgid2, N) \
  80     ((void) (Domainname), ngettext (Msgid1, Msgid2, N))
  81 # undef dcngettext
  82 # define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
  83     ((void) (Category), dngettext(Domainname, Msgid1, Msgid2, N))
  84 # undef textdomain
  85 # define textdomain(Domainname) ((const char *) (Domainname))
  86 # undef bindtextdomain
  87 # define bindtextdomain(Domainname, Dirname) \
  88     ((void) (Domainname), (const char *) (Dirname))
  89 # undef bind_textdomain_codeset
  90 # define bind_textdomain_codeset(Domainname, Codeset) \
  91     ((void) (Domainname), (const char *) (Codeset))
  92
  93 #endif
  94
  95 /* A pseudo function call that serves as a marker for the automated
  96    extraction of messages, but does not call gettext().  The run-time
  97    translation is done at a different place in the code.
  98    The argument, String, should be a literal string.  Concatenated strings
  99    and other string expressions won't work.
 100    The macro's expansion is not parenthesized, so that it is suitable as
 101    initializer for static 'char[]' or 'const char[]' variables.  */
 102 #define gettext_noop(String) String
 103
 104 /* The separator between msgctxt and msgid in a .mo file.  */
 105 #define GETTEXT_CONTEXT_GLUE "\004"
 106
 107 /* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
 108    MSGID.  MSGCTXT and MSGID must be string literals.  MSGCTXT should be
 109    short and rarely need to change.
 110    The letter 'p' stands for 'particular' or 'special'.  */
 111 #ifdef DEFAULT_TEXT_DOMAIN
 112 # define pgettext(Msgctxt, Msgid) \
 113    pgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
 114 #else
 115 # define pgettext(Msgctxt, Msgid) \
 116    pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
 117 #endif
 118 #define dpgettext(Domainname, Msgctxt, Msgid) \
 119   pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
 120 #define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
 121   pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
 122 #ifdef DEFAULT_TEXT_DOMAIN
 123 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
 124    npgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
 125 #else
 126 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
 127    npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
 128 #endif
 129 #define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
 130   npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
 131 #define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
 132   npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
 133
 134 #ifdef __GNUC__
 135 __inline
 136 #else
 137 #ifdef __cplusplus
 138 inline
 139 #endif
 140 #endif
 141 static const char *
 142 pgettext_aux (const char *domain,
 143               const char *msg_ctxt_id, const char *msgid,
 144               int category)
 145 {
 146   const char *translation = dcgettext (domain, msg_ctxt_id, category);
 147   if (translation == msg_ctxt_id)
 148     return msgid;
 149   else
 150     return translation;
 151 }
 152
 153 #ifdef __GNUC__
 154 __inline
 155 #else
 156 #ifdef __cplusplus
 157 inline
 158 #endif
 159 #endif
 160 static const char *
 161 npgettext_aux (const char *domain,
 162                const char *msg_ctxt_id, const char *msgid,
 163                const char *msgid_plural, unsigned long int n,
 164                int category)
 165 {
 166   const char *translation =
 167     dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
 168   if (translation == msg_ctxt_id || translation == msgid_plural)
 169     return (n == 1 ? msgid : msgid_plural);
 170   else
 171     return translation;
 172 }
 173
 174 /* The same thing extended for non-constant arguments.  Here MSGCTXT and MSGID
 175    can be arbitrary expressions.  But for string literals these macros are
 176    less efficient than those above.  */
 177
 178 #include <string.h>
 179
 180 #define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS \
 181   (((__GNUC__ >= 3 || __GNUG__ >= 2) && !__STRICT_ANSI__) \
 182    /* || __STDC_VERSION__ >= 199901L */ )
 183
 184 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 185 #include <stdlib.h>
 186 #endif
 187
 188 #define pgettext_expr(Msgctxt, Msgid) \
 189   dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
 190 #define dpgettext_expr(Domainname, Msgctxt, Msgid) \
 191   dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
 192
 193 #ifdef __GNUC__
 194 __inline
 195 #else
 196 #ifdef __cplusplus
 197 inline
 198 #endif
 199 #endif
 200 static const char *
 201 dcpgettext_expr (const char *domain,
 202                  const char *msgctxt, const char *msgid,
 203                  int category)
 204 {
 205   size_t msgctxt_len = strlen (msgctxt) + 1;
 206   size_t msgid_len = strlen (msgid) + 1;
 207   const char *translation;
 208 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 209   char msg_ctxt_id[msgctxt_len + msgid_len];
 210 #else
 211   char buf[1024];
 212   char *msg_ctxt_id =
 213     (msgctxt_len + msgid_len <= sizeof (buf)
 214      ? buf
 215      : (char *) malloc (msgctxt_len + msgid_len));
 216   if (msg_ctxt_id != NULL)
 217 #endif
 218     {
 219       memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
 220       msg_ctxt_id[msgctxt_len - 1] = '\004';
 221       memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
 222       translation = dcgettext (domain, msg_ctxt_id, category);
 223 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 224       if (msg_ctxt_id != buf)
 225         free (msg_ctxt_id);
 226 #endif
 227       if (translation != msg_ctxt_id)
 228         return translation;
 229     }
 230   return msgid;
 231 }
 232
 233 #define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
 234   dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
 235 #define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
 236   dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
 237
 238 #ifdef __GNUC__
 239 __inline
 240 #else
 241 #ifdef __cplusplus
 242 inline
 243 #endif
 244 #endif
 245 static const char *
 246 dcnpgettext_expr (const char *domain,
 247                   const char *msgctxt, const char *msgid,
 248                   const char *msgid_plural, unsigned long int n,
 249                   int category)
 250 {
 251   size_t msgctxt_len = strlen (msgctxt) + 1;
 252   size_t msgid_len = strlen (msgid) + 1;
 253   const char *translation;
 254 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 255   char msg_ctxt_id[msgctxt_len + msgid_len];
 256 #else
 257   char buf[1024];
 258   char *msg_ctxt_id =
 259     (msgctxt_len + msgid_len <= sizeof (buf)
 260      ? buf
 261      : (char *) malloc (msgctxt_len + msgid_len));
 262   if (msg_ctxt_id != NULL)
 263 #endif
 264     {
 265       memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
 266       msg_ctxt_id[msgctxt_len - 1] = '\004';
 267       memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
 268       translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
 269 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 270       if (msg_ctxt_id != buf)
 271         free (msg_ctxt_id);
 272 #endif
 273       if (!(translation == msg_ctxt_id || translation == msgid_plural))
 274         return translation;
 275     }
 276   return (n == 1 ? msgid : msgid_plural);
 277 }
 278
 279 #endif /* _LIBGETTEXT_H */