/* 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 <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_NUMERIC locale.  */

struct locale_numeric_t

{

  const char *decimal_point;

  const char *thousands_sep;

  char *grouping;

  size_t grouping_len;

  uint32_t decimal_point_wc;

  uint32_t thousands_sep_wc;

};

static void

numeric_startup (struct linereader *lr, struct localedef_t *locale,

		 int ignore_content)

{

  if (!ignore_content)

    {

      locale->categories[LC_NUMERIC].numeric =

	(struct locale_numeric_t *) xcalloc (1,

					     sizeof (struct locale_numeric_t));

    }

  if (lr != NULL)

    {

      lr->translate_strings = 1;

      lr->return_widestr = 0;

    }

}

void

numeric_finish (struct localedef_t *locale, const struct charmap_t *charmap)

{

  struct locale_numeric_t *numeric = locale->categories[LC_NUMERIC].numeric;

  int nothing = 0;

  /* Now resolve copying and also handle completely missing definitions.  */

  if (numeric == NULL)

    {

      /* First see whether we were supposed to copy.  If yes, find the

	 actual definition.  */

      if (locale->copy_name[LC_NUMERIC] != 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_NUMERIC, from->copy_name[LC_NUMERIC],

				from->repertoire_name, charmap);

	  while (from->categories[LC_NUMERIC].numeric == NULL

		 && from->copy_name[LC_NUMERIC] != NULL);

	  numeric = locale->categories[LC_NUMERIC].numeric

	    = from->categories[LC_NUMERIC].numeric;

	}

      /* If there is still no definition issue an warning and create an

	 empty one.  */

      if (numeric == NULL)

	{

	  record_warning (_("\

No definition for %s category found"), "LC_NUMERIC");

	  numeric_startup (NULL, locale, 0);

	  numeric = locale->categories[LC_NUMERIC].numeric;

	  nothing = 1;

	}

    }

  /* The decimal point must not be empty.  This is not said explicitly

     in POSIX but ANSI C (ISO/IEC 9899) says in 4.4.2.1 it has to be

     != "".  */

  if (numeric->decimal_point == NULL)

    {

      if (! nothing)

	record_error (0, 0, _("%s: field `%s' not defined"),

		      "LC_NUMERIC", "decimal_point");

      numeric->decimal_point = ".";

    }

  else if (numeric->decimal_point[0] == '\0' && ! nothing)

    {

      record_error (0, 0, _("\

%s: value for field `%s' must not be an empty string"),

		    "LC_NUMERIC", "decimal_point");

    }

  if (numeric->decimal_point_wc == L'\0')

    numeric->decimal_point_wc = L'.';

  if (numeric->grouping_len == 0 && ! nothing)

    record_error (0, 0, _("%s: field `%s' not defined"),

		  "LC_NUMERIC", "grouping");

}

void

numeric_output (struct localedef_t *locale, const struct charmap_t *charmap,

		const char *output_path)

{

  struct locale_numeric_t *numeric = locale->categories[LC_NUMERIC].numeric;

  struct locale_file file;

  init_locale_data (&file, _NL_ITEM_INDEX (_NL_NUM_LC_NUMERIC));

  add_locale_string (&file, numeric->decimal_point ?: "");

  add_locale_string (&file, numeric->thousands_sep ?: "");

  add_locale_raw_data (&file, numeric->grouping, numeric->grouping_len);

  add_locale_uint32 (&file, numeric->decimal_point_wc);

  add_locale_uint32 (&file, numeric->thousands_sep_wc);

  add_locale_string (&file, charmap->code_set_name);

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

}

/* The parser for the LC_NUMERIC section of the locale definition.  */

void

numeric_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_numeric_t *numeric;

  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_NUMERIC' 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_numeric,

		   LC_NUMERIC, "LC_NUMERIC", ignore_content);

      return;

    }

  /* Prepare the data structures.  */

  numeric_startup (ldfile, result, ignore_content);

  numeric = result->categories[LC_NUMERIC].numeric;

  while (1)

    {

      /* Of course we don't proceed beyond the end of file.  */

      if (nowtok == tok_eof)

	break;

      /* Ingore 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;							      \

	    }								      \

									      \

	  ldfile->return_widestr = 1;					      \

	  now = lr_token (ldfile, charmap, result, repertoire, verbose);	      \

	  if (now->tok != tok_string)					      \

	    goto err_label;						      \

	  if (numeric->cat != NULL)					      \

	    lr_error (ldfile, _("\

%s: field `%s' declared more than once"), "LC_NUMERIC", #cat);		      \

	  else if (!ignore_content && now->val.str.startmb == NULL)	      \

	    {								      \

	      lr_error (ldfile, _("\

%s: unknown character in field `%s'"), "LC_NUMERIC", #cat);		      \

	      numeric->cat = "";					      \

	      numeric->cat##_wc = L'\0';				      \

	    }								      \

	  else if (now->val.str.startwc != NULL && now->val.str.lenwc > 2)    \

	    {								      \

	      lr_error (ldfile, _("\

%s: value for field `%s' must be a single character"), "LC_NUMERIC", #cat);   \

	    }								      \

	  else if (!ignore_content)					      \

	    {								      \

	      numeric->cat = now->val.str.startmb;			      \

									      \

	      if (now->val.str.startwc != NULL)				      \

		numeric->cat##_wc = *now->val.str.startwc;		      \

	    }								      \

	  ldfile->return_widestr = 0;					      \

	  break

	  STR_ELEM (decimal_point);

	  STR_ELEM (thousands_sep);

	case tok_grouping:

	  /* 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;

	    }

	  now = lr_token (ldfile, charmap, result, NULL, verbose);

	  if (now->tok != tok_minus1 && now->tok != tok_number)

	    goto err_label;

	  else

	    {

	      size_t act = 0;

	      size_t max = 10;

	      char *grouping = xmalloc (max);

	      do

		{

		  if (act + 1 >= max)

		    {

		      max *= 2;

		      grouping = xrealloc (grouping, max);

		    }

		  if (act > 0 && grouping[act - 1] == '\177')

		    {

		      lr_error (ldfile, _("\

%s: `-1' must be last entry in `%s' field"), "LC_NUMERIC", "grouping");

		      lr_ignore_rest (ldfile, 0);

		      break;

		    }

		  if (now->tok == tok_minus1)

		    grouping[act++] = '\177';

		  else if (now->val.num == 0)

		    {

		      /* A value of 0 disables grouping from here on but

			 we must not store a NUL character since this

			 terminates the string.  Use something different

			 which must not be used otherwise.  */

		      grouping[act++] = '\377';

		    }

		  else if (now->val.num > 126)

		    lr_error (ldfile, _("\

%s: values for field `%s' must be smaller than 127"),

			      "LC_NUMERIC", "grouping");

		  else

		    grouping[act++] = now->val.num;

		  /* Next must be semicolon.  */

		  now = lr_token (ldfile, charmap, result, NULL, verbose);

		  if (now->tok != tok_semicolon)

		    break;

		  now = lr_token (ldfile, charmap, result, NULL, verbose);

		}

	      while (now->tok == tok_minus1 || now->tok == tok_number);

	      if (now->tok != tok_eol)

		goto err_label;

	      /* A single -1 means no grouping.  */

	      if (act == 1 && grouping[0] == '\177')

		act--;

	      grouping[act++] = '\0';

	      numeric->grouping = xrealloc (grouping, act);

	      numeric->grouping_len = act;

	    }

	  break;

	case tok_end:

	  /* Next we assume `LC_NUMERIC'.  */

	  now = lr_token (ldfile, charmap, result, NULL, verbose);

	  if (now->tok == tok_eof)

	    break;

	  if (now->tok == tok_eol)

	    lr_error (ldfile, _("%s: incomplete `END' line"), "LC_NUMERIC");

	  else if (now->tok != tok_lc_numeric)

	    lr_error (ldfile, _("\

%1$s: definition does not end with `END %1$s'"), "LC_NUMERIC");

	  lr_ignore_rest (ldfile, now->tok == tok_lc_numeric);

	  return;

	default:

	err_label:

	  SYNTAX_ERROR (_("%s: syntax error"), "LC_NUMERIC");

	}

      /* 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_NUMERIC");

}