locale/programs/ld-messages.c

   1 /* Copyright (C) 1995, 1996, 1997, 1998, 1999 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    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include <langinfo.h>
  25 #include <sys/types.h>
  26 #include <regex.h>
  27 #include <string.h>
  28 #include <sys/uio.h>
  29
  30 #include <assert.h>
  31
  32 #include "linereader.h"
  33 #include "localedef.h"
  34 #include "localeinfo.h"
  35 #include "locfile.h"
  36
  37
  38 /* The real definition of the struct for the LC_MESSAGES locale.  */
  39 struct locale_messages_t
  40 {
  41   const char *yesexpr;
  42   const char *noexpr;
  43   const char *yesstr;
  44   const char *nostr;
  45 };
  46
  47
  48 static void
  49 messages_startup (struct linereader *lr, struct localedef_t *locale,
  50                   int ignore_content)
  51 {
  52   if (!ignore_content)
  53     locale->categories[LC_MESSAGES].messages =
  54       (struct locale_messages_t *) xcalloc (1,
  55                                             sizeof (struct locale_messages_t));
  56
  57   if (lr != NULL)
  58     {
  59       lr->translate_strings = 1;
  60       lr->return_widestr = 0;
  61     }
  62 }
  63
  64
  65 void
  66 messages_finish (struct localedef_t *locale, struct charmap_t *charmap)
  67 {
  68   struct locale_messages_t *messages
  69     = locale->categories[LC_MESSAGES].messages;
  70   int nothing = 0;
  71
  72   /* Now resolve copying and also handle completely missing definitions.  */
  73   if (messages == NULL)
  74     {
  75       /* First see whether we were supposed to copy.  If yes, find the
  76          actual definition.  */
  77       if (locale->copy_name[LC_MESSAGES] != NULL)
  78         {
  79           /* Find the copying locale.  This has to happen transitively since
  80              the locale we are copying from might also copying another one.  */
  81           struct localedef_t *from = locale;
  82
  83           do
  84             from = find_locale (LC_MESSAGES, from->copy_name[LC_MESSAGES],
  85                                 from->repertoire_name, charmap);
  86           while (from->categories[LC_MESSAGES].messages == NULL
  87                  && from->copy_name[LC_MESSAGES] != NULL);
  88
  89           messages = locale->categories[LC_MESSAGES].messages
  90             = from->categories[LC_MESSAGES].messages;
  91         }
  92
  93       /* If there is still no definition issue an warning and create an
  94          empty one.  */
  95       if (messages == NULL)
  96         {
  97           error (0, 0, _("No definition for %s category found"),
  98                  "LC_MESSAGES");
  99           messages_startup (NULL, locale, 0);
 100           messages = locale->categories[LC_MESSAGES].messages;
 101           nothing = 1;
 102         }
 103     }
 104
 105   /* The fields YESSTR and NOSTR are optional.  */
 106   if (messages->yesstr == NULL)
 107     messages->yesstr = "";
 108   if (messages->nostr == NULL)
 109     messages->nostr = "";
 110
 111   if (messages->yesexpr == NULL)
 112     {
 113       if (! be_quiet && ! nothing)
 114         error (0, 0, _("%s: field `%s' undefined"), "LC_MESSAGES", "yesexpr");
 115       messages->yesexpr = "";
 116     }
 117   else if (messages->yesexpr[0] == '\0')
 118     {
 119       if (!be_quiet)
 120         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           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         error (0, 0, _("%s: field `%s' undefined"), "LC_MESSAGES", "noexpr");
 148       messages->noexpr = "";
 149     }
 150   else if (messages->noexpr[0] == '\0')
 151     {
 152       if (!be_quiet)
 153         error (0, 0, _("\
 154 %s: value for field `%s' must not be an empty string"),
 155                "LC_MESSAGES", "noexpr");
 156     }
 157   else
 158     {
 159       int result;
 160       regex_t re;
 161
 162       /* Test whether it are correct regular expressions.  */
 163       result = regcomp (&re, messages->noexpr, REG_EXTENDED);
 164       if (result != 0 && !be_quiet)
 165         {
 166           char errbuf[BUFSIZ];
 167
 168           (void) regerror (result, &re, errbuf, BUFSIZ);
 169           error (0, 0, _("\
 170 %s: no correct regular expression for field `%s': %s"),
 171                  "LC_MESSAGES", "noexpr", errbuf);
 172         }
 173       else if (result != 0)
 174         regfree (&re);
 175     }
 176 }
 177
 178
 179 void
 180 messages_output (struct localedef_t *locale, struct charmap_t *charmap,
 181                  const char *output_path)
 182 {
 183   struct locale_messages_t *messages
 184     = locale->categories[LC_MESSAGES].messages;
 185   struct iovec iov[2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
 186   struct locale_file data;
 187   uint32_t idx[_NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
 188   size_t cnt = 0;
 189
 190   data.magic = LIMAGIC (LC_MESSAGES);
 191   data.n = _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES);
 192   iov[cnt].iov_base = (void *) &data;
 193   iov[cnt].iov_len = sizeof (data);
 194   ++cnt;
 195
 196   iov[cnt].iov_base = (void *) idx;
 197   iov[cnt].iov_len = sizeof (idx);
 198   ++cnt;
 199
 200   idx[cnt - 2] = iov[0].iov_len + iov[1].iov_len;
 201   iov[cnt].iov_base = (char *) messages->yesexpr;
 202   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 203   ++cnt;
 204
 205   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 206   iov[cnt].iov_base = (char *) messages->noexpr;
 207   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 208   ++cnt;
 209
 210   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 211   iov[cnt].iov_base = (char *) messages->yesstr;
 212   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 213   ++cnt;
 214
 215   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 216   iov[cnt].iov_base = (char *) messages->nostr;
 217   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 218
 219   assert (cnt + 1 == 2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));
 220
 221   write_locale_data (output_path, "LC_MESSAGES",
 222                      2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES), iov);
 223 }
 224
 225
 226 /* The parser for the LC_MESSAGES section of the locale definition.  */
 227 void
 228 messages_read (struct linereader *ldfile, struct localedef_t *result,
 229                struct charmap_t *charmap, const char *repertoire_name,
 230                int ignore_content)
 231 {
 232   struct repertoire_t *repertoire = NULL;
 233   struct locale_messages_t *messages;
 234   struct token *now;
 235   enum token_t nowtok;
 236
 237   /* Get the repertoire we have to use.  */
 238   if (repertoire_name != NULL)
 239     repertoire = repertoire_read (repertoire_name);
 240
 241   /* The rest of the line containing `LC_MESSAGES' must be free.  */
 242   lr_ignore_rest (ldfile, 1);
 243
 244
 245   do
 246     {
 247       now = lr_token (ldfile, charmap, NULL);
 248       nowtok = now->tok;
 249     }
 250   while (nowtok == tok_eol);
 251
 252   /* If we see `copy' now we are almost done.  */
 253   if (nowtok == tok_copy)
 254     {
 255       handle_copy (ldfile, charmap, repertoire, result, tok_lc_messages,
 256                    LC_MESSAGES, "LC_MESSAGES", ignore_content);
 257       return;
 258     }
 259
 260   /* Prepare the data structures.  */
 261   messages_startup (ldfile, result, ignore_content);
 262   messages = result->categories[LC_MESSAGES].messages;
 263
 264   while (1)
 265     {
 266       struct token *arg;
 267
 268       /* Of course we don't proceed beyond the end of file.  */
 269       if (nowtok == tok_eof)
 270         break;
 271
 272       /* Ignore empty lines.  */
 273       if (nowtok == tok_eol)
 274         {
 275           now = lr_token (ldfile, charmap, NULL);
 276           nowtok = now->tok;
 277           continue;
 278         }
 279
 280       switch (nowtok)
 281         {
 282 #define STR_ELEM(cat) \
 283         case tok_##cat:                                                       \
 284           /* Ignore the rest of the line if we don't need the input of        \
 285              this line.  */                                                   \
 286           if (ignore_content)                                                 \
 287             {                                                                 \
 288               lr_ignore_rest (ldfile, 0);                                     \
 289               break;                                                          \
 290             }                                                                 \
 291                                                                               \
 292           if (messages->cat != NULL)                                          \
 293             {                                                                 \
 294               lr_error (ldfile, _("\
 295 %s: field `%s' declared more than once"), "LC_MESSAGES", #cat);               \
 296               lr_ignore_rest (ldfile, 0);                                     \
 297               break;                                                          \
 298             }                                                                 \
 299           now = lr_token (ldfile, charmap, repertoire);                       \
 300           if (now->tok != tok_string)                                         \
 301             goto syntax_error;                                                \
 302           else if (!ignore_content && now->val.str.startmb == NULL)           \
 303             {                                                                 \
 304               lr_error (ldfile, _("\
 305 %s: unknown character in field `%s'"), "LC_MESSAGES", #cat);                  \
 306               messages->cat = "";                                             \
 307             }                                                                 \
 308           else if (!ignore_content)                                           \
 309             messages->cat = now->val.str.startmb;                             \
 310           break
 311
 312           STR_ELEM (yesexpr);
 313           STR_ELEM (noexpr);
 314           STR_ELEM (yesstr);
 315           STR_ELEM (nostr);
 316
 317         case tok_end:
 318           /* Next we assume `LC_MESSAGES'.  */
 319           arg = lr_token (ldfile, charmap, NULL);
 320           if (arg->tok == tok_eof)
 321             break;
 322           if (arg->tok == tok_eol)
 323             lr_error (ldfile, _("%s: incomplete `END' line"), "LC_MESSAGES");
 324           else if (arg->tok != tok_lc_messages)
 325             lr_error (ldfile, _("\
 326 %1$s: definition does not end with `END %1$s'"), "LC_MESSAGES");
 327           lr_ignore_rest (ldfile, arg->tok == tok_lc_messages);
 328           return;
 329
 330         default:
 331         syntax_error:
 332           SYNTAX_ERROR (_("%s: syntax error"), "LC_MESSAGES");
 333         }
 334
 335       /* Prepare for the next round.  */
 336       now = lr_token (ldfile, charmap, NULL);
 337       nowtok = now->tok;
 338     }
 339
 340   /* When we come here we reached the end of the file.  */
 341   lr_error (ldfile, _("%s: premature end of file"), "LC_MESSAGES");
 342 }