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Giac_maj/giac-1.4.9/intl/explodename.c 4.41 KB
6663b6c9   adorian   projet complet av...
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  /* Copyright (C) 1995-1998, 2000-2001, 2003 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 Library 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
     Library General Public License for more details.
  
     You should have received a copy of the GNU Library General Public
     License along with this program; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
     USA.  */
  
  #ifdef HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  #include <stdlib.h>
  #include <string.h>
  #include <sys/types.h>
  
  #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 @@ */
  
  char *
  _nl_find_language (const char *name)
  {
    while (name[0] != '\0' && name[0] != '_' && name[0] != '@'
  	 && name[0] != '+' && name[0] != ',')
      ++name;
  
    return (char *) name;
  }
  
  
  int
  _nl_explode_name (char *name,
  		  const char **language, const char **modifier,
  		  const char **territory, const char **codeset,
  		  const char **normalized_codeset, const char **special,
  		  const char **sponsor, const char **revision)
  {
    enum { undecided, xpg, cen } syntax;
    char *cp;
    int mask;
  
    *modifier = NULL;
    *territory = NULL;
    *codeset = NULL;
    *normalized_codeset = NULL;
    *special = NULL;
    *sponsor = NULL;
    *revision = NULL;
  
    /* Now we determine the single parts of the locale name.  First
       look for the language.  Termination symbols are `_' and `@' if
       we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
    mask = 0;
    syntax = undecided;
    *language = cp = name;
    cp = _nl_find_language (*language);
  
    if (*language == cp)
      /* This does not make sense: language has to be specified.  Use
         this entry as it is without exploding.  Perhaps it is an alias.  */
      cp = strchr (*language, '\0');
    else if (cp[0] == '_')
      {
        /* Next is the territory.  */
        cp[0] = '\0';
        *territory = ++cp;
  
        while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@'
  	     && cp[0] != '+' && cp[0] != ',' && cp[0] != '_')
  	++cp;
  
        mask |= TERRITORY;
  
        if (cp[0] == '.')
  	{
  	  /* Next is the codeset.  */
  	  syntax = xpg;
  	  cp[0] = '\0';
  	  *codeset = ++cp;
  
  	  while (cp[0] != '\0' && cp[0] != '@')
  	    ++cp;
  
  	  mask |= XPG_CODESET;
  
  	  if (*codeset != cp && (*codeset)[0] != '\0')
  	    {
  	      *normalized_codeset = _nl_normalize_codeset (*codeset,
  							   cp - *codeset);
  	      if (strcmp (*codeset, *normalized_codeset) == 0)
  		free ((char *) *normalized_codeset);
  	      else
  		mask |= XPG_NORM_CODESET;
  	    }
  	}
      }
  
    if (cp[0] == '@' || (syntax != xpg && cp[0] == '+'))
      {
        /* Next is the modifier.  */
        syntax = cp[0] == '@' ? xpg : cen;
        cp[0] = '\0';
        *modifier = ++cp;
  
        while (syntax == cen && cp[0] != '\0' && cp[0] != '+'
  	     && cp[0] != ',' && cp[0] != '_')
  	++cp;
  
        mask |= XPG_MODIFIER | CEN_AUDIENCE;
      }
  
    if (syntax != xpg && (cp[0] == '+' || cp[0] == ',' || cp[0] == '_'))
      {
        syntax = cen;
  
        if (cp[0] == '+')
  	{
   	  /* Next is special application (CEN syntax).  */
  	  cp[0] = '\0';
  	  *special = ++cp;
  
  	  while (cp[0] != '\0' && cp[0] != ',' && cp[0] != '_')
  	    ++cp;
  
  	  mask |= CEN_SPECIAL;
  	}
  
        if (cp[0] == ',')
  	{
   	  /* Next is sponsor (CEN syntax).  */
  	  cp[0] = '\0';
  	  *sponsor = ++cp;
  
  	  while (cp[0] != '\0' && cp[0] != '_')
  	    ++cp;
  
  	  mask |= CEN_SPONSOR;
  	}
  
        if (cp[0] == '_')
  	{
   	  /* Next is revision (CEN syntax).  */
  	  cp[0] = '\0';
  	  *revision = ++cp;
  
  	  mask |= CEN_REVISION;
  	}
      }
  
    /* For CEN syntax values it might be important to have the
       separator character in the file name, not for XPG syntax.  */
    if (syntax == xpg)
      {
        if (*territory != NULL && (*territory)[0] == '\0')
  	mask &= ~TERRITORY;
  
        if (*codeset != NULL && (*codeset)[0] == '\0')
  	mask &= ~XPG_CODESET;
  
        if (*modifier != NULL && (*modifier)[0] == '\0')
  	mask &= ~XPG_MODIFIER;
      }
  
    return mask;
  }