locale/programs/ld-messages.c

   1 /* Copyright (C) 1995-2018 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           record_warning (_("\
  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 (! nothing)
 113         record_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       record_error (0, 0, _("\
 120 %s: value for field `%s' must not be an empty string"),
 121                     "LC_MESSAGES", "yesexpr");
 122     }
 123   else
 124     {
 125       int result;
 126       regex_t re;
 127
 128       /* Test whether it are correct regular expressions.  */
 129       result = regcomp (&re, messages->yesexpr, REG_EXTENDED);
 130       if (result != 0 && !be_quiet)
 131         {
 132           char errbuf[BUFSIZ];
 133
 134           (void) regerror (result, &re, errbuf, BUFSIZ);
 135           record_error (0, 0, _("\
 136 %s: no correct regular expression for field `%s': %s"),
 137                         "LC_MESSAGES", "yesexpr", errbuf);
 138         }
 139       else if (result != 0)
 140         regfree (&re);
 141     }
 142
 143   if (messages->noexpr == NULL)
 144     {
 145       if (! nothing)
 146         record_error (0, 0, _("%s: field `%s' undefined"),
 147                       "LC_MESSAGES", "noexpr");
 148       messages->noexpr = "^[nN]";
 149     }
 150   else if (messages->noexpr[0] == '\0')
 151     {
 152       record_error (0, 0, _("\
 153 %s: value for field `%s' must not be an empty string"),
 154                     "LC_MESSAGES", "noexpr");
 155     }
 156   else
 157     {
 158       int result;
 159       regex_t re;
 160
 161       /* Test whether it are correct regular expressions.  */
 162       result = regcomp (&re, messages->noexpr, REG_EXTENDED);
 163       if (result != 0 && !be_quiet)
 164         {
 165           char errbuf[BUFSIZ];
 166
 167           (void) regerror (result, &re, errbuf, BUFSIZ);
 168           record_error (0, 0, _("\
 169 %s: no correct regular expression for field `%s': %s"),
 170                         "LC_MESSAGES", "noexpr", errbuf);
 171         }
 172       else if (result != 0)
 173         regfree (&re);
 174     }
 175 }
 176
 177
 178 void
 179 messages_output (struct localedef_t *locale, const struct charmap_t *charmap,
 180                  const char *output_path)
 181 {
 182   struct locale_messages_t *messages
 183     = locale->categories[LC_MESSAGES].messages;
 184   struct locale_file file;
 185
 186   init_locale_data (&file, _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));
 187   add_locale_string (&file, messages->yesexpr);
 188   add_locale_string (&file, messages->noexpr);
 189   add_locale_string (&file, messages->yesstr);
 190   add_locale_string (&file, messages->nostr);
 191   add_locale_string (&file, charmap->code_set_name);
 192   write_locale_data (output_path, LC_MESSAGES, "LC_MESSAGES", &file);
 193 }
 194
 195
 196 /* The parser for the LC_MESSAGES section of the locale definition.  */
 197 void
 198 messages_read (struct linereader *ldfile, struct localedef_t *result,
 199                const struct charmap_t *charmap, const char *repertoire_name,
 200                int ignore_content)
 201 {
 202   struct repertoire_t *repertoire = NULL;
 203   struct locale_messages_t *messages;
 204   struct token *now;
 205   enum token_t nowtok;
 206
 207   /* Get the repertoire we have to use.  */
 208   if (repertoire_name != NULL)
 209     repertoire = repertoire_read (repertoire_name);
 210
 211   /* The rest of the line containing `LC_MESSAGES' must be free.  */
 212   lr_ignore_rest (ldfile, 1);
 213
 214
 215   do
 216     {
 217       now = lr_token (ldfile, charmap, result, NULL, verbose);
 218       nowtok = now->tok;
 219     }
 220   while (nowtok == tok_eol);
 221
 222   /* If we see `copy' now we are almost done.  */
 223   if (nowtok == tok_copy)
 224     {
 225       handle_copy (ldfile, charmap, repertoire_name, result, tok_lc_messages,
 226                    LC_MESSAGES, "LC_MESSAGES", ignore_content);
 227       return;
 228     }
 229
 230   /* Prepare the data structures.  */
 231   messages_startup (ldfile, result, ignore_content);
 232   messages = result->categories[LC_MESSAGES].messages;
 233
 234   while (1)
 235     {
 236       struct token *arg;
 237
 238       /* Of course we don't proceed beyond the end of file.  */
 239       if (nowtok == tok_eof)
 240         break;
 241
 242       /* Ignore empty lines.  */
 243       if (nowtok == tok_eol)
 244         {
 245           now = lr_token (ldfile, charmap, result, NULL, verbose);
 246           nowtok = now->tok;
 247           continue;
 248         }
 249
 250       switch (nowtok)
 251         {
 252 #define STR_ELEM(cat) \
 253         case tok_##cat:                                                       \
 254           /* Ignore the rest of the line if we don't need the input of        \
 255              this line.  */                                                   \
 256           if (ignore_content)                                                 \
 257             {                                                                 \
 258               lr_ignore_rest (ldfile, 0);                                     \
 259               break;                                                          \
 260             }                                                                 \
 261                                                                               \
 262           if (messages->cat != NULL)                                          \
 263             {                                                                 \
 264               lr_error (ldfile, _("\
 265 %s: field `%s' declared more than once"), "LC_MESSAGES", #cat);               \
 266               lr_ignore_rest (ldfile, 0);                                     \
 267               break;                                                          \
 268             }                                                                 \
 269           now = lr_token (ldfile, charmap, result, repertoire, verbose);      \
 270           if (now->tok != tok_string)                                         \
 271             goto syntax_error;                                                \
 272           else if (!ignore_content && now->val.str.startmb == NULL)           \
 273             {                                                                 \
 274               lr_error (ldfile, _("\
 275 %s: unknown character in field `%s'"), "LC_MESSAGES", #cat);                  \
 276               messages->cat = "";                                             \
 277             }                                                                 \
 278           else if (!ignore_content)                                           \
 279             messages->cat = now->val.str.startmb;                             \
 280           break
 281
 282           STR_ELEM (yesexpr);
 283           STR_ELEM (noexpr);
 284           STR_ELEM (yesstr);
 285           STR_ELEM (nostr);
 286
 287         case tok_end:
 288           /* Next we assume `LC_MESSAGES'.  */
 289           arg = lr_token (ldfile, charmap, result, NULL, verbose);
 290           if (arg->tok == tok_eof)
 291             break;
 292           if (arg->tok == tok_eol)
 293             lr_error (ldfile, _("%s: incomplete `END' line"), "LC_MESSAGES");
 294           else if (arg->tok != tok_lc_messages)
 295             lr_error (ldfile, _("\
 296 %1$s: definition does not end with `END %1$s'"), "LC_MESSAGES");
 297           lr_ignore_rest (ldfile, arg->tok == tok_lc_messages);
 298           return;
 299
 300         default:
 301         syntax_error:
 302           SYNTAX_ERROR (_("%s: syntax error"), "LC_MESSAGES");
 303         }
 304
 305       /* Prepare for the next round.  */
 306       now = lr_token (ldfile, charmap, result, NULL, verbose);
 307       nowtok = now->tok;
 308     }
 309
 310   /* When we come here we reached the end of the file.  */
 311   lr_error (ldfile, _("%s: premature end of file"), "LC_MESSAGES");
 312 }