/* Copyright (C) 1995-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@gnu.org>, 1995.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published

   by the Free Software Foundation; version 2 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <langinfo.h>

#include <sys/types.h>

#include <regex.h>

#include <string.h>

#include <stdint.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)

	{

	  record_warning (_("\

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 (! nothing)

	record_error (0, 0, _("%s: field `%s' undefined"),

		      "LC_MESSAGES", "yesexpr");

      messages->yesexpr = "^[yY]";

    }

  else if (messages->yesexpr[0] == '\0')

    {

      record_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);

	  record_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 (! nothing)

	record_error (0, 0, _("%s: field `%s' undefined"),

		      "LC_MESSAGES", "noexpr");

      messages->noexpr = "^[nN]";

    }

  else if (messages->noexpr[0] == '\0')

    {

      record_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);

	  record_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 locale_file file;

  init_locale_data (&file, _NL_ITEM_INDEX (_NL_NUM_LC_MESSAGES));

  add_locale_string (&file, messages->yesexpr);

  add_locale_string (&file, messages->noexpr);

  add_locale_string (&file, messages->yesstr);

  add_locale_string (&file, messages->nostr);

  add_locale_string (&file, charmap->code_set_name);

  write_locale_data (output_path, LC_MESSAGES, "LC_MESSAGES", &file;;

}

/* 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");

}