locale/programs/ld-messages.c

   1 /* Copyright (C) 1995-1999, 2000, 2001, 2002 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    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 "localedef.h"
  33 #include "linereader.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, const 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           if (! be_quiet)
  98             WITH_CUR_LOCALE (error (0, 0, _("\
  99 No definition for %s category found"), "LC_MESSAGES"));
 100           messages_startup (NULL, locale, 0);
 101           messages = locale->categories[LC_MESSAGES].messages;
 102           nothing = 1;
 103         }
 104     }
 105
 106   /* The fields YESSTR and NOSTR are optional.  */
 107   if (messages->yesstr == NULL)
 108     messages->yesstr = "";
 109   if (messages->nostr == NULL)
 110     messages->nostr = "";
 111
 112   if (messages->yesexpr == NULL)
 113     {
 114       if (! be_quiet && ! nothing)
 115         WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
 116                                 "LC_MESSAGES", "yesexpr"));
 117       messages->yesexpr = "^[yY]";
 118     }
 119   else if (messages->yesexpr[0] == '\0')
 120     {
 121       if (!be_quiet)
 122         WITH_CUR_LOCALE (error (0, 0, _("\
 123 %s: value for field `%s' must not be an empty string"),
 124                                 "LC_MESSAGES", "yesexpr"));
 125     }
 126   else
 127     {
 128       int result;
 129       regex_t re;
 130
 131       /* Test whether it are correct regular expressions.  */
 132       result = regcomp (&re, messages->yesexpr, REG_EXTENDED);
 133       if (result != 0 && !be_quiet)
 134         {
 135           char errbuf[BUFSIZ];
 136
 137           (void) regerror (result, &re, errbuf, BUFSIZ);
 138           WITH_CUR_LOCALE (error (0, 0, _("\
 139 %s: no correct regular expression for field `%s': %s"),
 140                                   "LC_MESSAGES", "yesexpr", errbuf));
 141         }
 142       else if (result != 0)
 143         regfree (&re);
 144     }
 145
 146   if (messages->noexpr == NULL)
 147     {
 148       if (! be_quiet && ! nothing)
 149         WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
 150                                 "LC_MESSAGES", "noexpr"));
 151       messages->noexpr = "^[nN]";
 152     }
 153   else if (messages->noexpr[0] == '\0')
 154     {
 155       if (!be_quiet)
 156         WITH_CUR_LOCALE (error (0, 0, _("\
 157 %s: value for field `%s' must not be an empty string"),
 158                                 "LC_MESSAGES", "noexpr"));
 159     }
 160   else
 161     {
 162       int result;
 163       regex_t re;
 164
 165       /* Test whether it are correct regular expressions.  */
 166       result = regcomp (&re, messages->noexpr, REG_EXTENDED);
 167       if (result != 0 && !be_quiet)
 168         {
 169           char errbuf[BUFSIZ];
 170
 171           (void) regerror (result, &re, errbuf, BUFSIZ);
 172           WITH_CUR_LOCALE (error (0, 0, _("\
 173 %s: no correct regular expression for field `%s': %s"),
 174                                   "LC_MESSAGES", "noexpr", errbuf));
 175         }
 176       else if (result != 0)
 177         regfree (&re);
 178     }
 179 }
 180
 181
 182 void
 183 messages_output (struct localedef_t *locale, const struct charmap_t *charmap,
 184                  const char *output_path)
 185 {
 186   struct locale_messages_t *messages
 187     = locale->categories[LC_MESSAGES].messages;
 188   struct iovec iov[2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
 189   struct locale_file data;
 190   uint32_t idx[_NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
 191   size_t cnt = 0;
 192
 193   data.magic = LIMAGIC (LC_MESSAGES);
 194   data.n = _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES);
 195   iov[cnt].iov_base = (void *) &data;
 196   iov[cnt].iov_len = sizeof (data);
 197   ++cnt;
 198
 199   iov[cnt].iov_base = (void *) idx;
 200   iov[cnt].iov_len = sizeof (idx);
 201   ++cnt;
 202
 203   idx[cnt - 2] = iov[0].iov_len + iov[1].iov_len;
 204   iov[cnt].iov_base = (char *) messages->yesexpr;
 205   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 206   ++cnt;
 207
 208   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 209   iov[cnt].iov_base = (char *) messages->noexpr;
 210   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 211   ++cnt;
 212
 213   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 214   iov[cnt].iov_base = (char *) messages->yesstr;
 215   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 216   ++cnt;
 217
 218   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 219   iov[cnt].iov_base = (char *) messages->nostr;
 220   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 221   ++cnt;
 222
 223   idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
 224   iov[cnt].iov_base = (char *) charmap->code_set_name;
 225   iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
 226
 227   assert (cnt + 1 == 2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));
 228
 229   write_locale_data (output_path, LC_MESSAGES, "LC_MESSAGES",
 230                      2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES), iov);
 231 }
 232
 233
 234 /* The parser for the LC_MESSAGES section of the locale definition.  */
 235 void
 236 messages_read (struct linereader *ldfile, struct localedef_t *result,
 237                const struct charmap_t *charmap, const char *repertoire_name,
 238                int ignore_content)
 239 {
 240   struct repertoire_t *repertoire = NULL;
 241   struct locale_messages_t *messages;
 242   struct token *now;
 243   enum token_t nowtok;
 244
 245   /* Get the repertoire we have to use.  */
 246   if (repertoire_name != NULL)
 247     repertoire = repertoire_read (repertoire_name);
 248
 249   /* The rest of the line containing `LC_MESSAGES' must be free.  */
 250   lr_ignore_rest (ldfile, 1);
 251
 252
 253   do
 254     {
 255       now = lr_token (ldfile, charmap, result, NULL, verbose);
 256       nowtok = now->tok;
 257     }
 258   while (nowtok == tok_eol);
 259
 260   /* If we see `copy' now we are almost done.  */
 261   if (nowtok == tok_copy)
 262     {
 263       handle_copy (ldfile, charmap, repertoire_name, result, tok_lc_messages,
 264                    LC_MESSAGES, "LC_MESSAGES", ignore_content);
 265       return;
 266     }
 267
 268   /* Prepare the data structures.  */
 269   messages_startup (ldfile, result, ignore_content);
 270   messages = result->categories[LC_MESSAGES].messages;
 271
 272   while (1)
 273     {
 274       struct token *arg;
 275
 276       /* Of course we don't proceed beyond the end of file.  */
 277       if (nowtok == tok_eof)
 278         break;
 279
 280       /* Ignore empty lines.  */
 281       if (nowtok == tok_eol)
 282         {
 283           now = lr_token (ldfile, charmap, result, NULL, verbose);
 284           nowtok = now->tok;
 285           continue;
 286         }
 287
 288       switch (nowtok)
 289         {
 290 #define STR_ELEM(cat) \
 291         case tok_##cat:                                                       \
 292           /* Ignore the rest of the line if we don't need the input of        \
 293              this line.  */                                                   \
 294           if (ignore_content)                                                 \
 295             {                                                                 \
 296               lr_ignore_rest (ldfile, 0);                                     \
 297               break;                                                          \
 298             }                                                                 \
 299                                                                               \
 300           if (messages->cat != NULL)                                          \
 301             {                                                                 \
 302               lr_error (ldfile, _("\
 303 %s: field `%s' declared more than once"), "LC_MESSAGES", #cat);               \
 304               lr_ignore_rest (ldfile, 0);                                     \
 305               break;                                                          \
 306             }                                                                 \
 307           now = lr_token (ldfile, charmap, result, repertoire, verbose);      \
 308           if (now->tok != tok_string)                                         \
 309             goto syntax_error;                                                \
 310           else if (!ignore_content && now->val.str.startmb == NULL)           \
 311             {                                                                 \
 312               lr_error (ldfile, _("\
 313 %s: unknown character in field `%s'"), "LC_MESSAGES", #cat);                  \
 314               messages->cat = "";                                             \
 315             }                                                                 \
 316           else if (!ignore_content)                                           \
 317             messages->cat = now->val.str.startmb;                             \
 318           break
 319
 320           STR_ELEM (yesexpr);
 321           STR_ELEM (noexpr);
 322           STR_ELEM (yesstr);
 323           STR_ELEM (nostr);
 324
 325         case tok_end:
 326           /* Next we assume `LC_MESSAGES'.  */
 327           arg = lr_token (ldfile, charmap, result, NULL, verbose);
 328           if (arg->tok == tok_eof)
 329             break;
 330           if (arg->tok == tok_eol)
 331             lr_error (ldfile, _("%s: incomplete `END' line"), "LC_MESSAGES");
 332           else if (arg->tok != tok_lc_messages)
 333             lr_error (ldfile, _("\
 334 %1$s: definition does not end with `END %1$s'"), "LC_MESSAGES");
 335           lr_ignore_rest (ldfile, arg->tok == tok_lc_messages);
 336           return;
 337
 338         default:
 339         syntax_error:
 340           SYNTAX_ERROR (_("%s: syntax error"), "LC_MESSAGES");
 341         }
 342
 343       /* Prepare for the next round.  */
 344       now = lr_token (ldfile, charmap, result, NULL, verbose);
 345       nowtok = now->tok;
 346     }
 347
 348   /* When we come here we reached the end of the file.  */
 349   lr_error (ldfile, _("%s: premature end of file"), "LC_MESSAGES");
 350 }