src/gettext.h

   1 /* Convenience header for conditional use of GNU <libintl.h>.
   2    Copyright (C) 1995-1998, 2000-2002, 2004-2006 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 _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 # define gettext(Msgid) ((const char *) (Msgid))
  68 # define dgettext(Domainname, Msgid) ((const char *) (Msgid))
  69 # define dcgettext(Domainname, Msgid, Category) ((const char *) (Msgid))
  70 # define ngettext(Msgid1, Msgid2, N) \
  71     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
  72 # define dngettext(Domainname, Msgid1, Msgid2, N) \
  73     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
  74 # define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
  75     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
  76 # define textdomain(Domainname) ((const char *) (Domainname))
  77 # define bindtextdomain(Domainname, Dirname) ((const char *) (Dirname))
  78 # define bind_textdomain_codeset(Domainname, Codeset) ((const char *) (Codeset))
  79
  80 #endif
  81
  82 /* A pseudo function call that serves as a marker for the automated
  83    extraction of messages, but does not call gettext().  The run-time
  84    translation is done at a different place in the code.
  85    The argument, String, should be a literal string.  Concatenated strings
  86    and other string expressions won't work.
  87    The macro's expansion is not parenthesized, so that it is suitable as
  88    initializer for static 'char[]' or 'const char[]' variables.  */
  89 #define gettext_noop(String) String
  90
  91 /* The separator between msgctxt and msgid in a .mo file.  */
  92 #define GETTEXT_CONTEXT_GLUE "\004"
  93
  94 /* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
  95    MSGID.  MSGCTXT and MSGID must be string literals.  MSGCTXT should be
  96    short and rarely need to change.
  97    The letter 'p' stands for 'particular' or 'special'.  */
  98 #ifdef DEFAULT_TEXT_DOMAIN
  99 # define pgettext(Msgctxt, Msgid) \
 100    pgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
 101 #else
 102 # define pgettext(Msgctxt, Msgid) \
 103    pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
 104 #endif
 105 #define dpgettext(Domainname, Msgctxt, Msgid) \
 106   pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
 107 #define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
 108   pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
 109 #ifdef DEFAULT_TEXT_DOMAIN
 110 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
 111    npgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
 112 #else
 113 # define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
 114    npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
 115 #endif
 116 #define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
 117   npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
 118 #define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
 119   npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
 120
 121 #ifdef __GNUC__
 122 __inline
 123 #else
 124 #ifdef __cplusplus
 125 inline
 126 #endif
 127 #endif
 128 static const char *
 129 pgettext_aux (const char *domain,
 130               const char *msg_ctxt_id, const char *msgid,
 131               int category)
 132 {
 133   const char *translation = dcgettext (domain, msg_ctxt_id, category);
 134   if (translation == msg_ctxt_id)
 135     return msgid;
 136   else
 137     return translation;
 138 }
 139
 140 #ifdef __GNUC__
 141 __inline
 142 #else
 143 #ifdef __cplusplus
 144 inline
 145 #endif
 146 #endif
 147 static const char *
 148 npgettext_aux (const char *domain,
 149                const char *msg_ctxt_id, const char *msgid,
 150                const char *msgid_plural, unsigned long int n,
 151                int category)
 152 {
 153   const char *translation =
 154     dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
 155   if (translation == msg_ctxt_id || translation == msgid_plural)
 156     return (n == 1 ? msgid : msgid_plural);
 157   else
 158     return translation;
 159 }
 160
 161 /* The same thing extended for non-constant arguments.  Here MSGCTXT and MSGID
 162    can be arbitrary expressions.  But for string literals these macros are
 163    less efficient than those above.  */
 164
 165 #include <string.h>
 166
 167 #define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS \
 168   (__GNUC__ >= 3 || __GNUG__ >= 2 /* || __STDC_VERSION__ >= 199901L */ )
 169
 170 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 171 #include <stdlib.h>
 172 #endif
 173
 174 #define pgettext_expr(Msgctxt, Msgid) \
 175   dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
 176 #define dpgettext_expr(Domainname, Msgctxt, Msgid) \
 177   dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
 178
 179 #ifdef __GNUC__
 180 __inline
 181 #else
 182 #ifdef __cplusplus
 183 inline
 184 #endif
 185 #endif
 186 static const char *
 187 dcpgettext_expr (const char *domain,
 188                  const char *msgctxt, const char *msgid,
 189                  int category)
 190 {
 191   size_t msgctxt_len = strlen (msgctxt) + 1;
 192   size_t msgid_len = strlen (msgid) + 1;
 193   const char *translation;
 194 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 195   char msg_ctxt_id[msgctxt_len + msgid_len];
 196 #else
 197   char buf[1024];
 198   char *msg_ctxt_id =
 199     (msgctxt_len + msgid_len <= sizeof (buf)
 200      ? buf
 201      : (char *) malloc (msgctxt_len + msgid_len));
 202   if (msg_ctxt_id != NULL)
 203 #endif
 204     {
 205       memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
 206       msg_ctxt_id[msgctxt_len - 1] = '\004';
 207       memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
 208       translation = dcgettext (domain, msg_ctxt_id, category);
 209 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 210       if (msg_ctxt_id != buf)
 211         free (msg_ctxt_id);
 212 #endif
 213       if (translation != msg_ctxt_id)
 214         return translation;
 215     }
 216   return msgid;
 217 }
 218
 219 #define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
 220   dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
 221 #define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
 222   dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
 223
 224 #ifdef __GNUC__
 225 __inline
 226 #else
 227 #ifdef __cplusplus
 228 inline
 229 #endif
 230 #endif
 231 static const char *
 232 dcnpgettext_expr (const char *domain,
 233                   const char *msgctxt, const char *msgid,
 234                   const char *msgid_plural, unsigned long int n,
 235                   int category)
 236 {
 237   size_t msgctxt_len = strlen (msgctxt) + 1;
 238   size_t msgid_len = strlen (msgid) + 1;
 239   const char *translation;
 240 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 241   char msg_ctxt_id[msgctxt_len + msgid_len];
 242 #else
 243   char buf[1024];
 244   char *msg_ctxt_id =
 245     (msgctxt_len + msgid_len <= sizeof (buf)
 246      ? buf
 247      : (char *) malloc (msgctxt_len + msgid_len));
 248   if (msg_ctxt_id != NULL)
 249 #endif
 250     {
 251       memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
 252       msg_ctxt_id[msgctxt_len - 1] = '\004';
 253       memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
 254       translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
 255 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 256       if (msg_ctxt_id != buf)
 257         free (msg_ctxt_id);
 258 #endif
 259       if (!(translation == msg_ctxt_id || translation == msgid_plural))
 260         return translation;
 261     }
 262   return (n == 1 ? msgid : msgid_plural);
 263 }
 264
 265 #endif /* _LIBGETTEXT_H */