locale/programs/ld-messages.c

   1 /* Copyright (C) 1995-1999,2000,2001,2002,2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.org>, 1995.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published
   7    by the Free Software Foundation; version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 #include <langinfo.h>
  23 #include <sys/types.h>
  24 #include <regex.h>
  25 #include <string.h>
  26 #include <sys/uio.h>
  27
  28 #include <assert.h>
  29
  30 #include "localedef.h"
  31 #include "linereader.h"
  32 #include "localeinfo.h"
  33 #include "locfile.h"
  34
  35
  36 /* The real definition of the struct for the LC_MESSAGES locale.  */
  37 struct locale_messages_t
  38 {
  39   const char *yesexpr;
  40   const char *noexpr;
  41   const char *yesstr;
  42   const char *nostr;
  43 };
  44
  45
  46 static void
  47 messages_startup (struct linereader *lr, struct localedef_t *locale,
  48                   int ignore_content)
  49 {
  50   if (!ignore_content)
  51     locale->categories[LC_MESSAGES].messages =
  52       (struct locale_messages_t *) xcalloc (1,
  53                                             sizeof (struct locale_messages_t));
  54
  55   if (lr != NULL)
  56     {
  57       lr->translate_strings = 1;
  58       lr->return_widestr = 0;
  59     }
  60 }
  61
  62
  63 void
  64 messages_finish (struct localedef_t *locale, const struct charmap_t *charmap)
  65 {
  66   struct locale_messages_t *messages
  67     = locale->categories[LC_MESSAGES].messages;
  68   int nothing = 0;
  69
  70   /* Now resolve copying and also handle completely missing definitions.  */
  71   if (messages == NULL)
  72     {
  73       /* First see whether we were supposed to copy.  If yes, find the
  74          actual definition.  */
  75       if (locale->copy_name[LC_MESSAGES] != NULL)
  76         {
  77           /* Find the copying locale.  This has to happen transitively since
  78              the locale we are copying from might also copying another one.  */
  79           struct localedef_t *from = locale;
  80
  81           do
  82             from = find_locale (LC_MESSAGES, from->copy_name[LC_MESSAGES],
  83                                 from->repertoire_name, charmap);
  84           while (from->categories[LC_MESSAGES].messages == NULL
  85                  && from->copy_name[LC_MESSAGES] != NULL);
  86
  87           messages = locale->categories[LC_MESSAGES].messages
  88             = from->categories[LC_MESSAGES].messages;
  89         }
  90
  91       /* If there is still no definition issue an warning and create an
  92          empty one.  */
  93       if (messages == NULL)
  94         {
  95           if (! be_quiet)
  96             WITH_CUR_LOCALE (error (0, 0, _("\
  97 No definition for %s category found"), "LC_MESSAGES"));
  98           messages_startup (NULL, locale, 0);
  99           messages = locale->categories[LC_MESSAGES].messages;
 100           nothing = 1;
 101         }
 102     }
 103
 104   /* The fields YESSTR and NOSTR are optional.  */
 105   if (messages->yesstr == NULL)
 106     messages->yesstr = "";
 107   if (messages->nostr == NULL)
 108     messages->nostr = "";
 109
 110   if (messages->yesexpr == NULL)
 111     {
 112       if (! be_quiet && ! nothing)
 113         WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
 114                                 "LC_MESSAGES", "yesexpr"));
 115       messages->yesexpr = "^[yY]";
 116     }
 117   else if (messages->yesexpr[0] == '\0')
 118     {
 119       if (!be_quiet)
 120         WITH_CUR_LOCALE (error (0, 0, _("\
 121 %s: value for field `%s' must not be an empty string"),
 122                                 "LC_MESSAGES", "yesexpr"));
 123     }
 124   else
 125     {
 126       int result;
 127       regex_t re;
 128
 129       /* Test whether it are correct regular expressions.  */
 130       result = regcomp (&re, messages->yesexpr, REG_EXTENDED);
 131       if (result != 0 && !be_quiet)
 132         {
 133           char errbuf[BUFSIZ];
 134
 135           (void) regerror (result, &re, errbuf, BUFSIZ);
 136           WITH_CUR_LOCALE (error (0, 0, _("\
 137 %s: no correct regular expression for field `%s': %s"),
 138                                   "LC_MESSAGES", "yesexpr", errbuf));
 139         }
 140       else if (result != 0)
 141         regfree (&re);
 142     }
 143
 144   if (messages->noexpr == NULL)
 145     {
 146       if (! be_quiet && ! nothing)
 147         WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
 148                                 "LC_MESSAGES", "noexpr"));
 149       messages->noexpr = "^[nN]";
 150     }
 151   else if (messages->noexpr[0] == '\0')
 152     {
 153       if (!be_quiet)
 154         WITH_CUR_LOCALE (error (0, 0, _("\
 155 %s: value for field `%s' must not be an empty string"),
 156                                 "LC_MESSAGES", "noexpr"));
 157     }
 158   else
 159     {
 160       int result;
 161       regex_t re;
 162
 163       /* Test whether it are correct regular expressions.  */
 164       result = regcomp (&re, messages->noexpr, REG_EXTENDED);
 165       if (result != 0 && !be_quiet)
 166         {
 167           char errbuf[BUFSIZ];
 168
 169           (void) regerror (result, &re, errbuf, BUFSIZ);
 170           WITH_CUR_LOCALE (error (0, 0, _("\
 171 %s: no correct regular expression for field `%s': %s"),
 172                                   "LC_MESSAGES", "noexpr", errbuf));
 173         }
 174       else if (result != 0)
 175         regfree (&re);
 176     }
 177 }
 178
 179
 180 void
 181 messages_output (struct localedef_t *locale, const struct charmap_t *charmap,
 182                  const char *output_path)
 183 {
 184   struct locale_messages_t *messages
 185     = locale->categories[LC_MESSAGES].messages;
 186   struct iovec iov[2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
 187   struct locale_file data;
 188   uint32_t idx[_NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
 189   size_t cnt = 0;
 190
 191   data.magic = LIMAGIC (LC_MESSAGES);
 192   data.n = _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES);
 193   iov[cnt].iov_base = (void *) &data;
 194   iov[cnt].iov_len = sizeof (data);
 195   ++cnt;
 196
 197   iov[cnt].iov_base = (void *) idx;
 198   iov[cnt].iov_len = sizeof (idx);
 199   ++cnt;
 200
 201   idx[cnt - 2] = iov[0].iov_len + iov[1].iov_len;
 202   iov[cnt].iov_base = (char *) messages->yesexpr;
 203   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 204   ++cnt;
 205
 206   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 207   iov[cnt].iov_base = (char *) messages->noexpr;
 208   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 209   ++cnt;
 210
 211   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 212   iov[cnt].iov_base = (char *) messages->yesstr;
 213   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 214   ++cnt;
 215
 216   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 217   iov[cnt].iov_base = (char *) messages->nostr;
 218   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 219   ++cnt;
 220
 221   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 222   iov[cnt].iov_base = (char *) charmap->code_set_name;
 223   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 224
 225   assert (cnt + 1 == 2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));
 226
 227   write_locale_data (output_path, LC_MESSAGES, "LC_MESSAGES",
 228                      2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES), iov);
 229 }
 230
 231
 232 /* The parser for the LC_MESSAGES section of the locale definition.  */
 233 void
 234 messages_read (struct linereader *ldfile, struct localedef_t *result,
 235                const struct charmap_t *charmap, const char *repertoire_name,
 236                int ignore_content)
 237 {
 238   struct repertoire_t *repertoire = NULL;
 239   struct locale_messages_t *messages;
 240   struct token *now;
 241   enum token_t nowtok;
 242
 243   /* Get the repertoire we have to use.  */
 244   if (repertoire_name != NULL)
 245     repertoire = repertoire_read (repertoire_name);
 246
 247   /* The rest of the line containing `LC_MESSAGES' must be free.  */
 248   lr_ignore_rest (ldfile, 1);
 249
 250
 251   do
 252     {
 253       now = lr_token (ldfile, charmap, result, NULL, verbose);
 254       nowtok = now->tok;
 255     }
 256   while (nowtok == tok_eol);
 257
 258   /* If we see `copy' now we are almost done.  */
 259   if (nowtok == tok_copy)
 260     {
 261       handle_copy (ldfile, charmap, repertoire_name, result, tok_lc_messages,
 262                    LC_MESSAGES, "LC_MESSAGES", ignore_content);
 263       return;
 264     }
 265
 266   /* Prepare the data structures.  */
 267   messages_startup (ldfile, result, ignore_content);
 268   messages = result->categories[LC_MESSAGES].messages;
 269
 270   while (1)
 271     {
 272       struct token *arg;
 273
 274       /* Of course we don't proceed beyond the end of file.  */
 275       if (nowtok == tok_eof)
 276         break;
 277
 278       /* Ignore empty lines.  */
 279       if (nowtok == tok_eol)
 280         {
 281           now = lr_token (ldfile, charmap, result, NULL, verbose);
 282           nowtok = now->tok;
 283           continue;
 284         }
 285
 286       switch (nowtok)
 287         {
 288 #define STR_ELEM(cat) \
 289         case tok_##cat:                                                       \
 290           /* Ignore the rest of the line if we don't need the input of        \
 291              this line.  */                                                   \
 292           if (ignore_content)                                                 \
 293             {                                                                 \
 294               lr_ignore_rest (ldfile, 0);                                     \
 295               break;                                                          \
 296             }                                                                 \
 297                                                                               \
 298           if (messages->cat != NULL)                                          \
 299             {                                                                 \
 300               lr_error (ldfile, _("\
 301 %s: field `%s' declared more than once"), "LC_MESSAGES", #cat);               \
 302               lr_ignore_rest (ldfile, 0);                                     \
 303               break;                                                          \
 304             }                                                                 \
 305           now = lr_token (ldfile, charmap, result, repertoire, verbose);      \
 306           if (now->tok != tok_string)                                         \
 307             goto syntax_error;                                                \
 308           else if (!ignore_content && now->val.str.startmb == NULL)           \
 309             {                                                                 \
 310               lr_error (ldfile, _("\
 311 %s: unknown character in field `%s'"), "LC_MESSAGES", #cat);                  \
 312               messages->cat = "";                                             \
 313             }                                                                 \
 314           else if (!ignore_content)                                           \
 315             messages->cat = now->val.str.startmb;                             \
 316           break
 317
 318           STR_ELEM (yesexpr);
 319           STR_ELEM (noexpr);
 320           STR_ELEM (yesstr);
 321           STR_ELEM (nostr);
 322
 323         case tok_end:
 324           /* Next we assume `LC_MESSAGES'.  */
 325           arg = lr_token (ldfile, charmap, result, NULL, verbose);
 326           if (arg->tok == tok_eof)
 327             break;
 328           if (arg->tok == tok_eol)
 329             lr_error (ldfile, _("%s: incomplete `END' line"), "LC_MESSAGES");
 330           else if (arg->tok != tok_lc_messages)
 331             lr_error (ldfile, _("\
 332 %1$s: definition does not end with `END %1$s'"), "LC_MESSAGES");
 333           lr_ignore_rest (ldfile, arg->tok == tok_lc_messages);
 334           return;
 335
 336         default:
 337         syntax_error:
 338           SYNTAX_ERROR (_("%s: syntax error"), "LC_MESSAGES");
 339         }
 340
 341       /* Prepare for the next round.  */
 342       now = lr_token (ldfile, charmap, result, NULL, verbose);
 343       nowtok = now->tok;
 344     }
 345
 346   /* When we come here we reached the end of the file.  */
 347   lr_error (ldfile, _("%s: premature end of file"), "LC_MESSAGES");
 348 }