locale/programs/ld-messages.c

   1 /* Copyright (C) 1995-2017 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 <stdint.h>
  27 #include <sys/uio.h>
  28
  29 #include <assert.h>
  30
  31 #include "localedef.h"
  32 #include "linereader.h"
  33 #include "localeinfo.h"
  34 #include "locfile.h"
  35
  36
  37 /* The real definition of the struct for the LC_MESSAGES locale.  */
  38 struct locale_messages_t
  39 {
  40   const char *yesexpr;
  41   const char *noexpr;
  42   const char *yesstr;
  43   const char *nostr;
  44 };
  45
  46
  47 static void
  48 messages_startup (struct linereader *lr, struct localedef_t *locale,
  49                   int ignore_content)
  50 {
  51   if (!ignore_content)
  52     locale->categories[LC_MESSAGES].messages =
  53       (struct locale_messages_t *) xcalloc (1,
  54                                             sizeof (struct locale_messages_t));
  55
  56   if (lr != NULL)
  57     {
  58       lr->translate_strings = 1;
  59       lr->return_widestr = 0;
  60     }
  61 }
  62
  63
  64 void
  65 messages_finish (struct localedef_t *locale, const struct charmap_t *charmap)
  66 {
  67   struct locale_messages_t *messages
  68     = locale->categories[LC_MESSAGES].messages;
  69   int nothing = 0;
  70
  71   /* Now resolve copying and also handle completely missing definitions.  */
  72   if (messages == NULL)
  73     {
  74       /* First see whether we were supposed to copy.  If yes, find the
  75          actual definition.  */
  76       if (locale->copy_name[LC_MESSAGES] != NULL)
  77         {
  78           /* Find the copying locale.  This has to happen transitively since
  79              the locale we are copying from might also copying another one.  */
  80           struct localedef_t *from = locale;
  81
  82           do
  83             from = find_locale (LC_MESSAGES, from->copy_name[LC_MESSAGES],
  84                                 from->repertoire_name, charmap);
  85           while (from->categories[LC_MESSAGES].messages == NULL
  86                  && from->copy_name[LC_MESSAGES] != NULL);
  87
  88           messages = locale->categories[LC_MESSAGES].messages
  89             = from->categories[LC_MESSAGES].messages;
  90         }
  91
  92       /* If there is still no definition issue an warning and create an
  93          empty one.  */
  94       if (messages == NULL)
  95         {
  96           if (! be_quiet)
  97             WITH_CUR_LOCALE (error (0, 0, _("\
  98 No definition for %s category found"), "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         WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
 115                                 "LC_MESSAGES", "yesexpr"));
 116       messages->yesexpr = "^[yY]";
 117     }
 118   else if (messages->yesexpr[0] == '\0')
 119     {
 120       if (!be_quiet)
 121         WITH_CUR_LOCALE (error (0, 0, _("\
 122 %s: value for field `%s' must not be an empty string"),
 123                                 "LC_MESSAGES", "yesexpr"));
 124     }
 125   else
 126     {
 127       int result;
 128       regex_t re;
 129
 130       /* Test whether it are correct regular expressions.  */
 131       result = regcomp (&re, messages->yesexpr, REG_EXTENDED);
 132       if (result != 0 && !be_quiet)
 133         {
 134           char errbuf[BUFSIZ];
 135
 136           (void) regerror (result, &re, errbuf, BUFSIZ);
 137           WITH_CUR_LOCALE (error (0, 0, _("\
 138 %s: no correct regular expression for field `%s': %s"),
 139                                   "LC_MESSAGES", "yesexpr", errbuf));
 140         }
 141       else if (result != 0)
 142         regfree (&re);
 143     }
 144
 145   if (messages->noexpr == NULL)
 146     {
 147       if (! be_quiet && ! nothing)
 148         WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
 149                                 "LC_MESSAGES", "noexpr"));
 150       messages->noexpr = "^[nN]";
 151     }
 152   else if (messages->noexpr[0] == '\0')
 153     {
 154       if (!be_quiet)
 155         WITH_CUR_LOCALE (error (0, 0, _("\
 156 %s: value for field `%s' must not be an empty string"),
 157                                 "LC_MESSAGES", "noexpr"));
 158     }
 159   else
 160     {
 161       int result;
 162       regex_t re;
 163
 164       /* Test whether it are correct regular expressions.  */
 165       result = regcomp (&re, messages->noexpr, REG_EXTENDED);
 166       if (result != 0 && !be_quiet)
 167         {
 168           char errbuf[BUFSIZ];
 169
 170           (void) regerror (result, &re, errbuf, BUFSIZ);
 171           WITH_CUR_LOCALE (error (0, 0, _("\
 172 %s: no correct regular expression for field `%s': %s"),
 173                                   "LC_MESSAGES", "noexpr", errbuf));
 174         }
 175       else if (result != 0)
 176         regfree (&re);
 177     }
 178 }
 179
 180
 181 void
 182 messages_output (struct localedef_t *locale, const struct charmap_t *charmap,
 183                  const char *output_path)
 184 {
 185   struct locale_messages_t *messages
 186     = locale->categories[LC_MESSAGES].messages;
 187   struct locale_file file;
 188
 189   init_locale_data (&file, _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));
 190   add_locale_string (&file, messages->yesexpr);
 191   add_locale_string (&file, messages->noexpr);
 192   add_locale_string (&file, messages->yesstr);
 193   add_locale_string (&file, messages->nostr);
 194   add_locale_string (&file, charmap->code_set_name);
 195   write_locale_data (output_path, LC_MESSAGES, "LC_MESSAGES", &file);
 196 }
 197
 198
 199 /* The parser for the LC_MESSAGES section of the locale definition.  */
 200 void
 201 messages_read (struct linereader *ldfile, struct localedef_t *result,
 202                const struct charmap_t *charmap, const char *repertoire_name,
 203                int ignore_content)
 204 {
 205   struct repertoire_t *repertoire = NULL;
 206   struct locale_messages_t *messages;
 207   struct token *now;
 208   enum token_t nowtok;
 209
 210   /* Get the repertoire we have to use.  */
 211   if (repertoire_name != NULL)
 212     repertoire = repertoire_read (repertoire_name);
 213
 214   /* The rest of the line containing `LC_MESSAGES' must be free.  */
 215   lr_ignore_rest (ldfile, 1);
 216
 217
 218   do
 219     {
 220       now = lr_token (ldfile, charmap, result, NULL, verbose);
 221       nowtok = now->tok;
 222     }
 223   while (nowtok == tok_eol);
 224
 225   /* If we see `copy' now we are almost done.  */
 226   if (nowtok == tok_copy)
 227     {
 228       handle_copy (ldfile, charmap, repertoire_name, result, tok_lc_messages,
 229                    LC_MESSAGES, "LC_MESSAGES", ignore_content);
 230       return;
 231     }
 232
 233   /* Prepare the data structures.  */
 234   messages_startup (ldfile, result, ignore_content);
 235   messages = result->categories[LC_MESSAGES].messages;
 236
 237   while (1)
 238     {
 239       struct token *arg;
 240
 241       /* Of course we don't proceed beyond the end of file.  */
 242       if (nowtok == tok_eof)
 243         break;
 244
 245       /* Ignore empty lines.  */
 246       if (nowtok == tok_eol)
 247         {
 248           now = lr_token (ldfile, charmap, result, NULL, verbose);
 249           nowtok = now->tok;
 250           continue;
 251         }
 252
 253       switch (nowtok)
 254         {
 255 #define STR_ELEM(cat) \
 256         case tok_##cat:                                                       \
 257           /* Ignore the rest of the line if we don't need the input of        \
 258              this line.  */                                                   \
 259           if (ignore_content)                                                 \
 260             {                                                                 \
 261               lr_ignore_rest (ldfile, 0);                                     \
 262               break;                                                          \
 263             }                                                                 \
 264                                                                               \
 265           if (messages->cat != NULL)                                          \
 266             {                                                                 \
 267               lr_error (ldfile, _("\
 268 %s: field `%s' declared more than once"), "LC_MESSAGES", #cat);               \
 269               lr_ignore_rest (ldfile, 0);                                     \
 270               break;                                                          \
 271             }                                                                 \
 272           now = lr_token (ldfile, charmap, result, repertoire, verbose);      \
 273           if (now->tok != tok_string)                                         \
 274             goto syntax_error;                                                \
 275           else if (!ignore_content && now->val.str.startmb == NULL)           \
 276             {                                                                 \
 277               lr_error (ldfile, _("\
 278 %s: unknown character in field `%s'"), "LC_MESSAGES", #cat);                  \
 279               messages->cat = "";                                             \
 280             }                                                                 \
 281           else if (!ignore_content)                                           \
 282             messages->cat = now->val.str.startmb;                             \
 283           break
 284
 285           STR_ELEM (yesexpr);
 286           STR_ELEM (noexpr);
 287           STR_ELEM (yesstr);
 288           STR_ELEM (nostr);
 289
 290         case tok_end:
 291           /* Next we assume `LC_MESSAGES'.  */
 292           arg = lr_token (ldfile, charmap, result, NULL, verbose);
 293           if (arg->tok == tok_eof)
 294             break;
 295           if (arg->tok == tok_eol)
 296             lr_error (ldfile, _("%s: incomplete `END' line"), "LC_MESSAGES");
 297           else if (arg->tok != tok_lc_messages)
 298             lr_error (ldfile, _("\
 299 %1$s: definition does not end with `END %1$s'"), "LC_MESSAGES");
 300           lr_ignore_rest (ldfile, arg->tok == tok_lc_messages);
 301           return;
 302
 303         default:
 304         syntax_error:
 305           SYNTAX_ERROR (_("%s: syntax error"), "LC_MESSAGES");
 306         }
 307
 308       /* Prepare for the next round.  */
 309       now = lr_token (ldfile, charmap, result, NULL, verbose);
 310       nowtok = now->tok;
 311     }
 312
 313   /* When we come here we reached the end of the file.  */
 314   lr_error (ldfile, _("%s: premature end of file"), "LC_MESSAGES");
 315 }