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ld-numeric.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 <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_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)
      {
        if (! be_quiet)
          WITH_CUR_LOCALE (error (0, 0, _("\
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 (! be_quiet && ! nothing)
      WITH_CUR_LOCALE (error (0, 0, _("%s: field `%s' not defined"),
                        "LC_NUMERIC", "decimal_point"));
      numeric->decimal_point = ".";
    }
  else if (numeric->decimal_point[0] == '\0' && ! be_quiet && ! nothing)
    {
      WITH_CUR_LOCALE (error (0, 0, _("\
%s: value for field `%s' must not be the empty string"),
                        "LC_NUMERIC", "decimal_point"));
    }
  if (numeric->decimal_point_wc == L'\0')
    numeric->decimal_point_wc = L'.';

  if (numeric->grouping_len == 0 && ! be_quiet && ! nothing)
    WITH_CUR_LOCALE (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 iovec iov[3 + _NL_ITEM_INDEX (_NL_NUM_LC_NUMERIC)];
  struct locale_file data;
  uint32_t idx[_NL_ITEM_INDEX (_NL_NUM_LC_NUMERIC)];
  size_t cnt = 0;

  data.magic = LIMAGIC (LC_NUMERIC);
  data.n = _NL_ITEM_INDEX (_NL_NUM_LC_NUMERIC);
  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 = (void *) (numeric->decimal_point ?: "");
  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 = (void *) (numeric->thousands_sep ?: "");
  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 = numeric->grouping;
  iov[cnt].iov_len = numeric->grouping_len;
  ++cnt;

  idx[cnt - 2] = idx[cnt - 3] + iov[cnt - 1].iov_len;

  /* Align following data */
  iov[cnt].iov_base = (void *) "\0\0";
  iov[cnt].iov_len = ((idx[cnt - 2] + 3) & ~3) - idx[cnt - 2];
  idx[cnt - 2] = (idx[cnt - 2] + 3) & ~3;
  ++cnt;

  iov[cnt].iov_base = (void *) &numeric->decimal_point_wc;
  iov[cnt].iov_len = sizeof (uint32_t);
  ++cnt;

  idx[cnt - 3] = idx[cnt - 4] + iov[cnt - 1].iov_len;
  iov[cnt].iov_base = (void *) &numeric->thousands_sep_wc;
  iov[cnt].iov_len = sizeof (uint32_t);
  ++cnt;

  idx[cnt - 3] = idx[cnt - 4] + iov[cnt - 1].iov_len;
  iov[cnt].iov_base = (void *) charmap->code_set_name;
  iov[cnt].iov_len = strlen (iov[cnt].iov_base) + 1;

  assert (cnt + 1 == 3 + _NL_ITEM_INDEX (_NL_NUM_LC_NUMERIC));

  write_locale_data (output_path, LC_NUMERIC, "LC_NUMERIC",
                 3 + _NL_ITEM_INDEX (_NL_NUM_LC_NUMERIC), iov);
}


/* 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 = ignore_content ? NULL : 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)
                {
                  if (!ignore_content)
                  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.  */
                  if (!ignore_content)
                  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 if (!ignore_content)
                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;

            if (!ignore_content)
            {
              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");
}

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