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