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/* Compatibility code for gettext-using-catgets interface.

   Copyright (C) 1995, 1997 Free Software Foundation, Inc.

   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; either version 2, 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, 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 <stdio.h>

#ifdef STDC_HEADERS

# include <stdlib.h>

# include <string.h>

#else

char *getenv ();

# ifdef HAVE_MALLOC_H

#  include <malloc.h>

# endif

#endif

#ifdef HAVE_NL_TYPES_H

# include <nl_types.h>

#endif

#include "libgettext.h"

/* @@ end of prolog @@ */

/* XPG3 defines the result of `setlocale (category, NULL)' as:

   ``Directs `setlocale()' to query `category' and return the current

     setting of `local'.''

   However it does not specify the exact format.  And even worse: POSIX

   defines this not at all.  So we can use this feature only on selected

   system (e.g. those using GNU C Library).  */

#ifdef _LIBC

# define HAVE_LOCALE_NULL

#endif

/* The catalog descriptor.  */

static nl_catd catalog = (nl_catd) -1;

/* Name of the default catalog.  */

static const char default_catalog_name[] = "messages";

/* Name of currently used catalog.  */

static const char *catalog_name = default_catalog_name;

/* Get ID for given string.  If not found return -1.  */

static int msg_to_cat_id PARAMS ((const char *msg));

/* Substitution for systems lacking this function in their C library.  */

#if !_LIBC && !HAVE_STPCPY

static char *stpcpy PARAMS ((char *dest, const char *src));

#endif

/* Set currently used domain/catalog.  */

char *

textdomain (domainname)

     const char *domainname;

{

  nl_catd new_catalog;

  char *new_name;

  size_t new_name_len;

  char *lang;

#if defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES \

    && defined HAVE_LOCALE_NULL

  lang = setlocale (LC_MESSAGES, NULL);

#else

  lang = getenv ("LC_ALL");

  if (lang == NULL || lang[0] == '\0')

    {

      lang = getenv ("LC_MESSAGES");

      if (lang == NULL || lang[0] == '\0')

        lang = getenv ("LANG");

    }

#endif

  if (lang == NULL || lang[0] == '\0')

    lang = "C";

  /* See whether name of currently used domain is asked.  */

  if (domainname == NULL)

    return (char *) catalog_name;

  if (domainname[0] == '\0')

    domainname = default_catalog_name;

  /* Compute length of added path element.  */

  new_name_len = sizeof (LOCALEDIR) - 1 + 1 + strlen (lang)

                 + sizeof ("/LC_MESSAGES/") - 1 + sizeof (PACKAGE) - 1

                 + sizeof (".cat");

  new_name = (char *) malloc (new_name_len);

  if (new_name == NULL)

    return NULL;

  strcpy (new_name, PACKAGE);

  new_catalog = catopen (new_name, 0);

  if (new_catalog == (nl_catd) -1)

    {

      /* NLSPATH search didn't work, try absolute path */

      sprintf (new_name, "%s/%s/LC_MESSAGES/%s.cat", LOCALEDIR, lang,

               PACKAGE);

      new_catalog = catopen (new_name, 0);

      if (new_catalog == (nl_catd) -1)

        {

          free (new_name);

          return (char *) catalog_name;

        }

    }

  /* Close old catalog.  */

  if (catalog != (nl_catd) -1)

    catclose (catalog);

  if (catalog_name != default_catalog_name)

    free ((char *) catalog_name);

  catalog = new_catalog;

  catalog_name = new_name;

  return (char *) catalog_name;

}

char *

bindtextdomain (domainname, dirname)

     const char *domainname;

     const char *dirname;

{

#if HAVE_SETENV || HAVE_PUTENV

  char *old_val, *new_val, *cp;

  size_t new_val_len;

  /* This does not make much sense here but to be compatible do it.  */

  if (domainname == NULL)

    return NULL;

  /* Compute length of added path element.  If we use setenv we don't need

     the first byts for NLSPATH=, but why complicate the code for this

     peanuts.  */

  new_val_len = sizeof ("NLSPATH=") - 1 + strlen (dirname)

                + sizeof ("/%L/LC_MESSAGES/%N.cat");

  old_val = getenv ("NLSPATH");

  if (old_val == NULL || old_val[0] == '\0')

    {

      old_val = NULL;

      new_val_len += 1 + sizeof (LOCALEDIR) - 1

                     + sizeof ("/%L/LC_MESSAGES/%N.cat");

    }

  else

    new_val_len += strlen (old_val);

  new_val = (char *) malloc (new_val_len);

  if (new_val == NULL)

    return NULL;

# if HAVE_SETENV

  cp = new_val;

# else

  cp = stpcpy (new_val, "NLSPATH=");

# endif

  cp = stpcpy (cp, dirname);

  cp = stpcpy (cp, "/%L/LC_MESSAGES/%N.cat:");

  if (old_val == NULL)

    {

# if __STDC__

      stpcpy (cp, LOCALEDIR "/%L/LC_MESSAGES/%N.cat");

# else

      cp = stpcpy (cp, LOCALEDIR);

      stpcpy (cp, "/%L/LC_MESSAGES/%N.cat");

# endif

    }

  else

    stpcpy (cp, old_val);

# if HAVE_SETENV

  setenv ("NLSPATH", new_val, 1);

  free (new_val);

# else

  putenv (new_val);

  /* Do *not* free the environment entry we just entered.  It is used

     from now on.   */

# endif

#endif

  return (char *) domainname;

}

#undef gettext

char *

gettext (msg)

     const char *msg;

{

  int msgid;

  if (msg == NULL || catalog == (nl_catd) -1)

    return (char *) msg;

  /* Get the message from the catalog.  We always use set number 1.

     The message ID is computed by the function `msg_to_cat_id'

     which works on the table generated by `po-to-tbl'.  */

  msgid = msg_to_cat_id (msg);

  if (msgid == -1)

    return (char *) msg;

  return catgets (catalog, 1, msgid, (char *) msg);

}

/* Look through the table `_msg_tbl' which has `_msg_tbl_length' entries

   for the one equal to msg.  If it is found return the ID.  In case when

   the string is not found return -1.  */

static int

msg_to_cat_id (msg)

     const char *msg;

{

  int cnt;

  for (cnt = 0; cnt < _msg_tbl_length; ++cnt)

    if (strcmp (msg, _msg_tbl[cnt]._msg) == 0)

      return _msg_tbl[cnt]._msg_number;

  return -1;

}

/* @@ begin of epilog @@ */

/* We don't want libintl.a to depend on any other library.  So we

   avoid the non-standard function stpcpy.  In GNU C Library this

   function is available, though.  Also allow the symbol HAVE_STPCPY

   to be defined.  */

#if !_LIBC && !HAVE_STPCPY

static char *

stpcpy (dest, src)

     char *dest;

     const char *src;

{

  while ((*dest++ = *src++) != '\0')

    /* Do nothing. */ ;

  return dest - 1;

}

#endif