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 #else
  28
  29 /* Solaris /usr/include/locale.h includes /usr/include/libintl.h, which
  30    chokes if dcgettext is defined as a macro.  So include it now, to make
  31    later inclusions of <locale.h> a NOP.  We don't include <libintl.h>
  32    as well because people using "gettext.h" will not include <libintl.h>,
  33    and also including <libintl.h> would fail on SunOS 4, whereas <locale.h>
  34    is OK.  */
  35 #if defined(__sun)
  36 # include <locale.h>
  37 #endif
  38
  39 /* Many header files from the libstdc++ coming with g++ 3.3 or newer include
  40    <libintl.h>, which chokes if dcgettext is defined as a macro.  So include
  41    it now, to make later inclusions of <libintl.h> a NOP.  */
  42 #if defined(__cplusplus) && defined(__GNUG__) && (__GNUC__ >= 3)
  43 # include <cstdlib>
  44 # if (__GLIBC__ >= 2) || _GLIBCXX_HAVE_LIBINTL_H
  45 #  include <libintl.h>
  46 # endif
  47 #endif
  48
  49 /* Disabled NLS.
  50    The casts to 'const char *' serve the purpose of producing warnings
  51    for invalid uses of the value returned from these functions.
  52    On pre-ANSI systems without 'const', the config.h file is supposed to
  53    contain "#define const".  */
  54 # define gettext(Msgid) ((const char *) (Msgid))
  55 # define dgettext(Domainname, Msgid) ((const char *) (Msgid))
  56 # define dcgettext(Domainname, Msgid, Category) ((const char *) (Msgid))
  57 # define ngettext(Msgid1, Msgid2, N) \
  58     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
  59 # define dngettext(Domainname, Msgid1, Msgid2, N) \
  60     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
  61 # define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
  62     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
  63 # define textdomain(Domainname) ((const char *) (Domainname))
  64 # define bindtextdomain(Domainname, Dirname) ((const char *) (Dirname))
  65 # define bind_textdomain_codeset(Domainname, Codeset) ((const char *) (Codeset))
  66
  67 #endif
  68
  69 /* A pseudo function call that serves as a marker for the automated
  70    extraction of messages, but does not call gettext().  The run-time
  71    translation is done at a different place in the code.
  72    The argument, String, should be a literal string.  Concatenated strings
  73    and other string expressions won't work.
  74    The macro's expansion is not parenthesized, so that it is suitable as
  75    initializer for static 'char[]' or 'const char[]' variables.  */
  76 #define gettext_noop(String) String
  77
  78 /* The separator between msgctxt and msgid in a .mo file.  */
  79 #define GETTEXT_CONTEXT_GLUE "\004"
  80
  81 /* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
  82    MSGID.  MSGCTXT and MSGID must be string literals.  MSGCTXT should be
  83    short and rarely need to change.
  84    The letter 'p' stands for 'particular' or 'special'.  */
  85 #define pgettext(Msgctxt, Msgid) \
  86   pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
  87 #define dpgettext(Domainname, Msgctxt, Msgid) \
  88   pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
  89 #define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
  90   pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
  91 #define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
  92   npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
  93 #define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
  94   npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
  95 #define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
  96   npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
  97
  98 #ifdef __GNUC__
  99 __inline
 100 #else
 101 #ifdef __cplusplus
 102 inline
 103 #endif
 104 #endif
 105 static const char *
 106 pgettext_aux (const char *domain,
 107               const char *msg_ctxt_id, const char *msgid,
 108               int category)
 109 {
 110   const char *translation = dcgettext (domain, msg_ctxt_id, category);
 111   if (translation == msg_ctxt_id)
 112     return msgid;
 113   else
 114     return translation;
 115 }
 116
 117 #ifdef __GNUC__
 118 __inline
 119 #else
 120 #ifdef __cplusplus
 121 inline
 122 #endif
 123 #endif
 124 static const char *
 125 npgettext_aux (const char *domain,
 126                const char *msg_ctxt_id, const char *msgid,
 127                const char *msgid_plural, unsigned long int n,
 128                int category)
 129 {
 130   const char *translation =
 131     dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
 132   if (translation == msg_ctxt_id || translation == msgid_plural)
 133     return (n == 1 ? msgid : msgid_plural);
 134   else
 135     return translation;
 136 }
 137
 138 /* The same thing extended for non-constant arguments.  Here MSGCTXT and MSGID
 139    can be arbitrary expressions.  But for string literals these macros are
 140    less efficient than those above.  */
 141
 142 #include <string.h>
 143
 144 #define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS \
 145   (__GNUC__ >= 3 || defined __cplusplus)
 146
 147 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 148 #include <stdlib.h>
 149 #endif
 150
 151 #define pgettext_expr(Msgctxt, Msgid) \
 152   dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
 153 #define dpgettext_expr(Domainname, Msgctxt, Msgid) \
 154   dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
 155
 156 #ifdef __GNUC__
 157 __inline
 158 #else
 159 #ifdef __cplusplus
 160 inline
 161 #endif
 162 #endif
 163 static const char *
 164 dcpgettext_expr (const char *domain,
 165                  const char *msgctxt, const char *msgid,
 166                  int category)
 167 {
 168   size_t msgctxt_len = strlen (msgctxt) + 1;
 169   size_t msgid_len = strlen (msgid) + 1;
 170   const char *translation;
 171 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 172   char msg_ctxt_id[msgctxt_len + msgid_len];
 173 #else
 174   char buf[1024];
 175   char *msg_ctxt_id =
 176     (msgctxt_len + msgid_len <= sizeof (buf)
 177      ? buf
 178      : (char *) malloc (msgctxt_len + msgid_len));
 179   if (msg_ctxt_id != NULL)
 180 #endif
 181     {
 182       memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
 183       msg_ctxt_id[msgctxt_len - 1] = '\004';
 184       memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
 185       translation = dcgettext (domain, msg_ctxt_id, category);
 186 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 187       if (msg_ctxt_id != buf)
 188         free (msg_ctxt_id);
 189 #endif
 190       if (translation != msg_ctxt_id)
 191         return translation;
 192     }
 193   return msgid;
 194 }
 195
 196 #define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
 197   dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
 198 #define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
 199   dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
 200
 201 #ifdef __GNUC__
 202 __inline
 203 #else
 204 #ifdef __cplusplus
 205 inline
 206 #endif
 207 #endif
 208 static const char *
 209 dcnpgettext_expr (const char *domain,
 210                   const char *msgctxt, const char *msgid,
 211                   const char *msgid_plural, unsigned long int n,
 212                   int category)
 213 {
 214   size_t msgctxt_len = strlen (msgctxt) + 1;
 215   size_t msgid_len = strlen (msgid) + 1;
 216   const char *translation;
 217 #if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 218   char msg_ctxt_id[msgctxt_len + msgid_len];
 219 #else
 220   char buf[1024];
 221   char *msg_ctxt_id =
 222     (msgctxt_len + msgid_len <= sizeof (buf)
 223      ? buf
 224      : (char *) malloc (msgctxt_len + msgid_len));
 225   if (msg_ctxt_id != NULL)
 226 #endif
 227     {
 228       memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
 229       msg_ctxt_id[msgctxt_len - 1] = '\004';
 230       memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
 231       translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
 232 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 233       if (msg_ctxt_id != buf)
 234         free (msg_ctxt_id);
 235 #endif
 236       if (!(translation == msg_ctxt_id || translation == msgid_plural))
 237         return translation;
 238     }
 239   return (n == 1 ? msgid : msgid_plural);
 240 }
 241
 242 #endif /* _LIBGETTEXT_H */