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ld-messages.c

/* Copyright (C) 1995-1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.org>, 1995.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <langinfo.h>
#include <sys/types.h>
#include <regex.h>
#include <string.h>
#include <sys/uio.h>

#include <assert.h>

#include "localedef.h"
#include "linereader.h"
#include "localeinfo.h"
#include "locfile.h"


/* The real definition of the struct for the LC_MESSAGES locale.  */
struct locale_messages_t
{
  const char *yesexpr;
  const char *noexpr;
  const char *yesstr;
  const char *nostr;
};


static void
messages_startup (struct linereader *lr, struct localedef_t *locale,
              int ignore_content)
{
  if (!ignore_content)
    locale->categories[LC_MESSAGES].messages =
      (struct locale_messages_t *) xcalloc (1,
                                  sizeof (struct locale_messages_t));

  if (lr != NULL)
    {
      lr->translate_strings = 1;
      lr->return_widestr = 0;
    }
}


void
messages_finish (struct localedef_t *locale, const struct charmap_t *charmap)
{
  struct locale_messages_t *messages
    = locale->categories[LC_MESSAGES].messages;
  int nothing = 0;

  /* Now resolve copying and also handle completely missing definitions.  */
  if (messages == NULL)
    {
      /* First see whether we were supposed to copy.  If yes, find the
       actual definition.  */
      if (locale->copy_name[LC_MESSAGES] != NULL)
      {
        /* Find the copying locale.  This has to happen transitively since
           the locale we are copying from might also copying another one.  */
        struct localedef_t *from = locale;

        do
          from = find_locale (LC_MESSAGES, from->copy_name[LC_MESSAGES],
                        from->repertoire_name, charmap);
        while (from->categories[LC_MESSAGES].messages == NULL
             && from->copy_name[LC_MESSAGES] != NULL);

        messages = locale->categories[LC_MESSAGES].messages
          = from->categories[LC_MESSAGES].messages;
      }

      /* If there is still no definition issue an warning and create an
       empty one.  */
      if (messages == NULL)
      {
        if (! be_quiet)
          WITH_CUR_LOCALE (error (0, 0, _("\
No definition for %s category found"), "LC_MESSAGES"));
        messages_startup (NULL, locale, 0);
        messages = locale->categories[LC_MESSAGES].messages;
        nothing = 1;
      }
    }

  /* The fields YESSTR and NOSTR are optional.  */
  if (messages->yesstr == NULL)
    messages->yesstr = "";
  if (messages->nostr == NULL)
    messages->nostr = "";

  if (messages->yesexpr == NULL)
    {
      if (! be_quiet && ! nothing)
      WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
                        "LC_MESSAGES", "yesexpr"));
      messages->yesexpr = "^[yY]";
    }
  else if (messages->yesexpr[0] == '\0')
    {
      if (!be_quiet)
      WITH_CUR_LOCALE (error (0, 0, _("\
%s: value for field `%s' must not be an empty string"),
                        "LC_MESSAGES", "yesexpr"));
    }
  else
    {
      int result;
      regex_t re;

      /* Test whether it are correct regular expressions.  */
      result = regcomp (&re, messages->yesexpr, REG_EXTENDED);
      if (result != 0 && !be_quiet)
      {
        char errbuf[BUFSIZ];

        (void) regerror (result, &re, errbuf, BUFSIZ);
        WITH_CUR_LOCALE (error (0, 0, _("\
%s: no correct regular expression for field `%s': %s"),
                          "LC_MESSAGES", "yesexpr", errbuf));
      }
      else if (result != 0)
      regfree (&re);
    }

  if (messages->noexpr == NULL)
    {
      if (! be_quiet && ! nothing)
      WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' undefined"),
                        "LC_MESSAGES", "noexpr"));
      messages->noexpr = "^[nN]";
    }
  else if (messages->noexpr[0] == '\0')
    {
      if (!be_quiet)
      WITH_CUR_LOCALE (error (0, 0, _("\
%s: value for field `%s' must not be an empty string"),
                        "LC_MESSAGES", "noexpr"));
    }
  else
    {
      int result;
      regex_t re;

      /* Test whether it are correct regular expressions.  */
      result = regcomp (&re, messages->noexpr, REG_EXTENDED);
      if (result != 0 && !be_quiet)
      {
        char errbuf[BUFSIZ];

        (void) regerror (result, &re, errbuf, BUFSIZ);
        WITH_CUR_LOCALE (error (0, 0, _("\
%s: no correct regular expression for field `%s': %s"),
                          "LC_MESSAGES", "noexpr", errbuf));
      }
      else if (result != 0)
      regfree (&re);
    }
}


void
messages_output (struct localedef_t *locale, const struct charmap_t *charmap,
             const char *output_path)
{
  struct locale_messages_t *messages
    = locale->categories[LC_MESSAGES].messages;
  struct iovec iov[2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
  struct locale_file data;
  uint32_t idx[_NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES)];
  size_t cnt = 0;

  data.magic = LIMAGIC (LC_MESSAGES);
  data.n = _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES);
  iov[cnt].iov_base = (void *) &data;
  iov[cnt].iov_len = sizeof (data);
  ++cnt;

  iov[cnt].iov_base = (void *) idx;
  iov[cnt].iov_len = sizeof (idx);
  ++cnt;

  idx[cnt - 2] = iov[0].iov_len + iov[1].iov_len;
  iov[cnt].iov_base = (char *) messages->yesexpr;
  iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
  ++cnt;

  idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
  iov[cnt].iov_base = (char *) messages->noexpr;
  iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
  ++cnt;

  idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
  iov[cnt].iov_base = (char *) messages->yesstr;
  iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
  ++cnt;

  idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
  iov[cnt].iov_base = (char *) messages->nostr;
  iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;
  ++cnt;

  idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;
  iov[cnt].iov_base = (char *) charmap->code_set_name;
  iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;

  assert (cnt + 1 == 2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));

  write_locale_data (output_path, LC_MESSAGES, "LC_MESSAGES",
                 2 + _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES), iov);
}


/* The parser for the LC_MESSAGES section of the locale definition.  */
void
messages_read (struct linereader *ldfile, struct localedef_t *result,
             const struct charmap_t *charmap, const char *repertoire_name,
             int ignore_content)
{
  struct repertoire_t *repertoire = NULL;
  struct locale_messages_t *messages;
  struct token *now;
  enum token_t nowtok;

  /* Get the repertoire we have to use.  */
  if (repertoire_name != NULL)
    repertoire = repertoire_read (repertoire_name);

  /* The rest of the line containing `LC_MESSAGES' must be free.  */
  lr_ignore_rest (ldfile, 1);


  do
    {
      now = lr_token (ldfile, charmap, result, NULL, verbose);
      nowtok = now->tok;
    }
  while (nowtok == tok_eol);

  /* If we see `copy' now we are almost done.  */
  if (nowtok == tok_copy)
    {
      handle_copy (ldfile, charmap, repertoire_name, result, tok_lc_messages,
               LC_MESSAGES, "LC_MESSAGES", ignore_content);
      return;
    }

  /* Prepare the data structures.  */
  messages_startup (ldfile, result, ignore_content);
  messages = result->categories[LC_MESSAGES].messages;

  while (1)
    {
      struct token *arg;

      /* Of course we don't proceed beyond the end of file.  */
      if (nowtok == tok_eof)
      break;

      /* Ignore empty lines.  */
      if (nowtok == tok_eol)
      {
        now = lr_token (ldfile, charmap, result, NULL, verbose);
        nowtok = now->tok;
        continue;
      }

      switch (nowtok)
      {
#define STR_ELEM(cat) \
      case tok_##cat:                                             \
        /* Ignore the rest of the line if we don't need the input of          \
           this line.  */                                         \
        if (ignore_content)                                       \
          {                                                 \
            lr_ignore_rest (ldfile, 0);                           \
            break;                                                \
          }                                                 \
                                                            \
        if (messages->cat != NULL)                                \
          {                                                 \
            lr_error (ldfile, _("\
%s: field `%s' declared more than once"), "LC_MESSAGES", #cat);               \
            lr_ignore_rest (ldfile, 0);                           \
            break;                                                \
          }                                                 \
        now = lr_token (ldfile, charmap, result, repertoire, verbose);      \
        if (now->tok != tok_string)                               \
          goto syntax_error;                                      \
        else if (!ignore_content && now->val.str.startmb == NULL)       \
          {                                                 \
            lr_error (ldfile, _("\
%s: unknown character in field `%s'"), "LC_MESSAGES", #cat);                  \
            messages->cat = "";                                   \
          }                                                 \
        else if (!ignore_content)                                 \
          messages->cat = now->val.str.startmb;                   \
        break

        STR_ELEM (yesexpr);
        STR_ELEM (noexpr);
        STR_ELEM (yesstr);
        STR_ELEM (nostr);

      case tok_end:
        /* Next we assume `LC_MESSAGES'.  */
        arg = lr_token (ldfile, charmap, result, NULL, verbose);
        if (arg->tok == tok_eof)
          break;
        if (arg->tok == tok_eol)
          lr_error (ldfile, _("%s: incomplete `END' line"), "LC_MESSAGES");
        else if (arg->tok != tok_lc_messages)
          lr_error (ldfile, _("\
%1$s: definition does not end with `END %1$s'"), "LC_MESSAGES");
        lr_ignore_rest (ldfile, arg->tok == tok_lc_messages);
        return;

      default:
      syntax_error:
        SYNTAX_ERROR (_("%s: syntax error"), "LC_MESSAGES");
      }

      /* Prepare for the next round.  */
      now = lr_token (ldfile, charmap, result, NULL, verbose);
      nowtok = now->tok;
    }

  /* When we come here we reached the end of the file.  */
  lr_error (ldfile, _("%s: premature end of file"), "LC_MESSAGES");
}

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