1: /* Copyright (C) 1996-2000, 2001, 2002 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3:    Contributed by Ulrich Drepper, <drepper@gnu.org>.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <alloca.h>
   21: #include <errno.h>
   22: #include <locale.h>
   23: #include <nl_types.h>
   24: #include <stdlib.h>
   25: #include <string.h>
   26: #include <unistd.h>
   27: #include <sys/mman.h>
   28: 
   29: #include "catgetsinfo.h"
   30: 
   31: 
   32: /* Open the catalog and return a descriptor for the catalog.  */
   33: nl_catd
   34: catopen (const char *cat_name, int flag)
   35: {
   36:   __nl_catd result;
   37:   const char *env_var = NULL;
   38:   const char *nlspath = NULL;
   39: 
   40:   if (strchr (cat_name, '/') == NULL)
   41:     {
   42:       if (flag == NL_CAT_LOCALE)
   43:         /* Use the current locale setting for LC_MESSAGES.  */
   44:         env_var = setlocale (LC_MESSAGES, NULL);
   45:       else
   46:         /* Use the LANG environment variable.  */
   47:         env_var = getenv ("LANG");
   48: 
   49:       if (env_var == NULL || *env_var == '\0'
   50:           || (__libc_enable_secure && strchr (env_var, '/') != NULL))
   51:         env_var = "C";
   52: 
   53:       nlspath = getenv ("NLSPATH");
   54:       if (nlspath != NULL && *nlspath != '\0')
   55:         {
   56:           /* Append the system dependent directory.  */
   57:           size_t len = strlen (nlspath) + 1 + sizeof NLSPATH;
   58:           char *tmp = alloca (len);
   59: 
   60:           __stpcpy (__stpcpy (__stpcpy (tmp, nlspath), ":"), NLSPATH);
   61:           nlspath = tmp;
   62:         }
   63:       else
   64:         nlspath = NLSPATH;
   65:     }
   66: 
   67:   result = (__nl_catd) malloc (sizeof (*result));
   68:   if (result == NULL)
   69:     /* We cannot get enough memory.  */
   70:     return (nl_catd) -1;
   71: 
   72:   if (__open_catalog (cat_name, nlspath, env_var, result) != 0)
   73:     {
   74:       /* Couldn't open the file.  */
   75:       free ((void *) result);
   76:       return (nl_catd) -1;
   77:     }
   78: 
   79:   return (nl_catd) result;
   80: }
   81: 
   82: 
   83: /* Return message from message catalog.  */
   84: char *
   85: catgets (nl_catd catalog_desc, int set, int message, const char *string)
   86: {
   87:   __nl_catd catalog;
   88:   size_t idx;
   89:   size_t cnt;
   90: 
   91:   /* Be generous if catalog which failed to be open is used.  */
   92:   if (catalog_desc == (nl_catd) -1 || ++set <= 0 || message < 0)
   93:     return (char *) string;
   94: 
   95:   catalog = (__nl_catd) catalog_desc;
   96: 
   97:   idx = ((set * message) % catalog->plane_size) * 3;
   98:   cnt = 0;
   99:   do
  100:     {
  101:       if (catalog->name_ptr[idx + 0] == (u_int32_t) set
  102:           && catalog->name_ptr[idx + 1] == (u_int32_t) message)
  103:         return (char *) &catalog->strings[catalog->name_ptr[idx + 2]];
  104: 
  105:       idx += catalog->plane_size * 3;
  106:     }
  107:   while (++cnt < catalog->plane_depth);
  108: 
  109:   __set_errno (ENOMSG);
  110:   return (char *) string;
  111: }
  112: 
  113: 
  114: /* Return resources used for loaded message catalog.  */
  115: int
  116: catclose (nl_catd catalog_desc)
  117: {
  118:   __nl_catd catalog;
  119: 
  120:   /* Be generous if catalog which failed to be open is used.  */
  121:   if (catalog_desc == (nl_catd) -1)
  122:     {
  123:       __set_errno (EBADF);
  124:       return -1;
  125:     }
  126: 
  127:   catalog = (__nl_catd) catalog_desc;
  128: 
  129: #ifdef _POSIX_MAPPED_FILES
  130:   if (catalog->status == mmapped)
  131:     __munmap ((void *) catalog->file_ptr, catalog->file_size);
  132:   else
  133: #endif  /* _POSIX_MAPPED_FILES */
  134:     if (catalog->status == malloced)
  135:       free ((void *) catalog->file_ptr);
  136:     else
  137:       {
  138:         __set_errno (EBADF);
  139:         return -1;
  140:       }
  141: 
  142:   free ((void *) catalog);
  143: 
  144:   return 0;
  145: }