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/* Handle list of needed message catalogs

   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.

   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 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; 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

#if defined HAVE_STRING_H || defined _LIBC

# ifndef _GNU_SOURCE

#  define _GNU_SOURCE   1

# endif

# include <string.h>

#else

# include <strings.h>

# ifndef memcpy

#  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)

# endif

#endif

#if !HAVE_STRCHR && !defined _LIBC

# ifndef strchr

#  define strchr index

# endif

#endif

#if defined _LIBC || defined HAVE_ARGZ_H

# include <argz.h>

#endif

#include <ctype.h>

#include <sys/types.h>

#if defined STDC_HEADERS || defined _LIBC

# include <stdlib.h>

#endif

#include "loadinfo.h"

/* On some strange systems still no definition of NULL is found.  Sigh!  */

#ifndef NULL

# if defined __STDC__ && __STDC__

#  define NULL ((void *) 0)

# else

#  define NULL 0

# endif

#endif

/* @@ end of prolog @@ */

#ifdef _LIBC

/* Rename the non ANSI C functions.  This is required by the standard

   because some ANSI C functions will require linking with this object

   file and the name space must not be polluted.  */

# ifndef stpcpy

#  define stpcpy(dest, src) __stpcpy(dest, src)

# endif

#else

# ifndef HAVE_STPCPY

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

# endif

#endif

/* Define function which are usually not available.  */

#if !defined _LIBC && !defined HAVE___ARGZ_COUNT

/* Returns the number of strings in ARGZ.  */

static size_t argz_count__ PARAMS ((const char *argz, size_t len));

static size_t

argz_count__ (argz, len)

     const char *argz;

     size_t len;

{

  size_t count = 0;

  while (len > 0)

    {

      size_t part_len = strlen (argz);

      argz += part_len + 1;

      len -= part_len + 1;

      count++;

    }

  return count;

}

# undef __argz_count

# define __argz_count(argz, len) argz_count__ (argz, len)

#endif  /* !_LIBC && !HAVE___ARGZ_COUNT */

#if !defined _LIBC && !defined HAVE___ARGZ_STRINGIFY

/* Make '\0' separated arg vector ARGZ printable by converting all the '\0's

   except the last into the character SEP.  */

static void argz_stringify__ PARAMS ((char *argz, size_t len, int sep));

static void

argz_stringify__ (argz, len, sep)

     char *argz;

     size_t len;

     int sep;

{

  while (len > 0)

    {

      size_t part_len = strlen (argz);

      argz += part_len;

      len -= part_len + 1;

      if (len > 0)

        *argz++ = sep;

    }

}

# undef __argz_stringify

# define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)

#endif  /* !_LIBC && !HAVE___ARGZ_STRINGIFY */

#if !defined _LIBC && !defined HAVE___ARGZ_NEXT

static char *argz_next__ PARAMS ((char *argz, size_t argz_len,

                                  const char *entry));

static char *

argz_next__ (argz, argz_len, entry)

     char *argz;

     size_t argz_len;

     const char *entry;

{

  if (entry)

    {

      if (entry < argz + argz_len)

        entry = strchr (entry, '\0') + 1;

      return entry >= argz + argz_len ? NULL : (char *) entry;

    }

  else

    if (argz_len > 0)

      return argz;

    else

      return 0;

}

# undef __argz_next

# define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)

#endif  /* !_LIBC && !HAVE___ARGZ_NEXT */

/* Return number of bits set in X.  */

static int pop PARAMS ((int x));

static inline int

pop (x)

     int x;

{

  /* We assume that no more than 16 bits are used.  */

  x = ((x & ~0x5555) >> 1) + (x & 0x5555);

  x = ((x & ~0x3333) >> 2) + (x & 0x3333);

  x = ((x >> 4) + x) & 0x0f0f;

  x = ((x >> 8) + x) & 0xff;

  return x;

}

struct loaded_l10nfile *

_nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len, mask, language,

                    territory, codeset, normalized_codeset, modifier, special,

                    sponsor, revision, filename, do_allocate)

     struct loaded_l10nfile **l10nfile_list;

     const char *dirlist;

     size_t dirlist_len;

     int mask;

     const char *language;

     const char *territory;

     const char *codeset;

     const char *normalized_codeset;

     const char *modifier;

     const char *special;

     const char *sponsor;

     const char *revision;

     const char *filename;

     int do_allocate;

{

  char *abs_filename;

  struct loaded_l10nfile *last = NULL;

  struct loaded_l10nfile *retval;

  char *cp;

  size_t entries;

  int cnt;

  /* Allocate room for the full file name.  */

  abs_filename = (char *) malloc (dirlist_len

                                  + strlen (language)

                                  + ((mask & TERRITORY) != 0

                                     ? strlen (territory) + 1 : 0)

                                  + ((mask & XPG_CODESET) != 0

                                     ? strlen (codeset) + 1 : 0)

                                  + ((mask & XPG_NORM_CODESET) != 0

                                     ? strlen (normalized_codeset) + 1 : 0)

                                  + (((mask & XPG_MODIFIER) != 0

                                      || (mask & CEN_AUDIENCE) != 0)

                                     ? strlen (modifier) + 1 : 0)

                                  + ((mask & CEN_SPECIAL) != 0

                                     ? strlen (special) + 1 : 0)

                                  + (((mask & CEN_SPONSOR) != 0

                                      || (mask & CEN_REVISION) != 0)

                                     ? (1 + ((mask & CEN_SPONSOR) != 0

                                             ? strlen (sponsor) + 1 : 0)

                                        + ((mask & CEN_REVISION) != 0

                                           ? strlen (revision) + 1 : 0)) : 0)

                                  + 1 + strlen (filename) + 1);

  if (abs_filename == NULL)

    return NULL;

  retval = NULL;

  last = NULL;

  /* Construct file name.  */

  memcpy (abs_filename, dirlist, dirlist_len);

  __argz_stringify (abs_filename, dirlist_len, ':');

  cp = abs_filename + (dirlist_len - 1);

  *cp++ = '/';

  cp = stpcpy (cp, language);

  if ((mask & TERRITORY) != 0)

    {

      *cp++ = '_';

      cp = stpcpy (cp, territory);

    }

  if ((mask & XPG_CODESET) != 0)

    {

      *cp++ = '.';

      cp = stpcpy (cp, codeset);

    }

  if ((mask & XPG_NORM_CODESET) != 0)

    {

      *cp++ = '.';

      cp = stpcpy (cp, normalized_codeset);

    }

  if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)

    {

      /* This component can be part of both syntaces but has different

         leading characters.  For CEN we use `+', else `@'.  */

      *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';

      cp = stpcpy (cp, modifier);

    }

  if ((mask & CEN_SPECIAL) != 0)

    {

      *cp++ = '+';

      cp = stpcpy (cp, special);

    }

  if ((mask & (CEN_SPONSOR | CEN_REVISION)) != 0)

    {

      *cp++ = ',';

      if ((mask & CEN_SPONSOR) != 0)

        cp = stpcpy (cp, sponsor);

      if ((mask & CEN_REVISION) != 0)

        {

          *cp++ = '_';

          cp = stpcpy (cp, revision);

        }

    }

  *cp++ = '/';

  stpcpy (cp, filename);

  /* Look in list of already loaded domains whether it is already

     available.  */

  last = NULL;

  for (retval = *l10nfile_list; retval != NULL; retval = retval->next)

    if (retval->filename != NULL)

      {

        int compare = strcmp (retval->filename, abs_filename);

        if (compare == 0)

          /* We found it!  */

          break;

        if (compare < 0)

          {

            /* It's not in the list.  */

            retval = NULL;

            break;

          }

        last = retval;

      }

  if (retval != NULL || do_allocate == 0)

    {

      free (abs_filename);

      return retval;

    }

  retval = (struct loaded_l10nfile *)

    malloc (sizeof (*retval) + (__argz_count (dirlist, dirlist_len)

                                * (1 << pop (mask))

                                * sizeof (struct loaded_l10nfile *)));

  if (retval == NULL)

    return NULL;

  retval->filename = abs_filename;

  retval->decided = (__argz_count (dirlist, dirlist_len) != 1

                     || ((mask & XPG_CODESET) != 0

                         && (mask & XPG_NORM_CODESET) != 0));

  retval->data = NULL;

  if (last == NULL)

    {

      retval->next = *l10nfile_list;

      *l10nfile_list = retval;

    }

  else

    {

      retval->next = last->next;

      last->next = retval;

    }

  entries = 0;

  /* If the DIRLIST is a real list the RETVAL entry corresponds not to

     a real file.  So we have to use the DIRLIST separation mechanism

     of the inner loop.  */

  cnt = __argz_count (dirlist, dirlist_len) == 1 ? mask - 1 : mask;

  for (; cnt >= 0; --cnt)

    if ((cnt & ~mask) == 0

        && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)

        && ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))

      {

        /* Iterate over all elements of the DIRLIST.  */

        char *dir = NULL;

        while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))

               != NULL)

          retval->successor[entries++]

            = _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1, cnt,

                                  language, territory, codeset,

                                  normalized_codeset, modifier, special,

                                  sponsor, revision, filename, 1);

      }

  retval->successor[entries] = NULL;

  return retval;

}

/* Normalize codeset name.  There is no standard for the codeset

   names.  Normalization allows the user to use any of the common

   names.  */

const char *

_nl_normalize_codeset (codeset, name_len)

     const unsigned char *codeset;

     size_t name_len;

{

  int len = 0;

  int only_digit = 1;

  char *retval;

  char *wp;

  size_t cnt;

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

    if (isalnum (codeset[cnt]))

      {

        ++len;

        if (isalpha (codeset[cnt]))

          only_digit = 0;

      }

  retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);

  if (retval != NULL)

    {

      if (only_digit)

        wp = stpcpy (retval, "iso");

      else

        wp = retval;

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

        if (isalpha (codeset[cnt]))

          *wp++ = tolower (codeset[cnt]);

        else if (isdigit (codeset[cnt]))

          *wp++ = codeset[cnt];

      *wp = '\0';

    }

  return (const char *) retval;

}

/* @@ 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