Line data    Source code

       1             : /*
       2             :     Mosh: the mobile shell
       3             :     Copyright 2012 Keith Winstein
       4             : 
       5             :     This program is free software: you can redistribute it and/or modify
       6             :     it under the terms of the GNU General Public License as published by
       7             :     the Free Software Foundation, either version 3 of the License, or
       8             :     (at your option) any later version.
       9             : 
      10             :     This program 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
      13             :     GNU General Public License for more details.
      14             : 
      15             :     You should have received a copy of the GNU General Public License
      16             :     along with this program.  If not, see <http://www.gnu.org/licenses/>.
      17             : 
      18             :     In addition, as a special exception, the copyright holders give
      19             :     permission to link the code of portions of this program with the
      20             :     OpenSSL library under certain conditions as described in each
      21             :     individual source file, and distribute linked combinations including
      22             :     the two.
      23             : 
      24             :     You must obey the GNU General Public License in all respects for all
      25             :     of the code used other than OpenSSL. If you modify file(s) with this
      26             :     exception, you may extend this exception to your version of the
      27             :     file(s), but you are not obligated to do so. If you do not wish to do
      28             :     so, delete this exception statement from your version. If you delete
      29             :     this exception statement from all source files in the program, then
      30             :     also delete it here.
      31             : */
      32             : 
      33             : #include "config.h"
      34             : 
      35             : #include <string.h>
      36             : #include <stdlib.h>
      37             : #include <stdio.h>
      38             : #include <locale.h>
      39             : #include <errno.h>
      40             : #include <string>
      41             : 
      42             : #if HAVE_LANGINFO_H
      43             : #include <langinfo.h>
      44             : #endif
      45             : 
      46             : #include "locale_utils.h"
      47             : 
      48             : 
      49           0 : const std::string LocaleVar::str( void ) const
      50             : {
      51           0 :   if ( name.empty() ) {
      52           0 :     return std::string( "[no charset variables]" );
      53             :   }
      54           0 :   return name + "=" + value;
      55             : }
      56             : 
      57           0 : const LocaleVar get_ctype( void )
      58             : {
      59             :   /* Reimplement the search logic, just for diagnostics */
      60           0 :   if ( const char *all = getenv( "LC_ALL" ) ) {
      61           0 :     return LocaleVar( "LC_ALL", all );
      62           0 :   } else if ( const char *ctype = getenv( "LC_CTYPE" ) ) {
      63           0 :     return LocaleVar( "LC_CTYPE", ctype );
      64           0 :   } else if ( const char *lang = getenv( "LANG" ) ) {
      65           0 :     return LocaleVar( "LANG", lang );
      66             :   }
      67           0 :   return LocaleVar( "", "" );
      68             : }
      69             : 
      70         952 : const char *locale_charset( void )
      71             : {
      72         952 :   static const char ASCII_name[] = "US-ASCII";
      73             : 
      74             :   /* Produce more pleasant name of US-ASCII */
      75         952 :   const char *ret = nl_langinfo( CODESET );
      76             : 
      77         952 :   if ( strcmp( ret, "ANSI_X3.4-1968" ) == 0 ) {
      78           0 :     ret = ASCII_name;
      79             :   }
      80             : 
      81         952 :   return ret;
      82             : }
      83             : 
      84         952 : bool is_utf8_locale( void ) {
      85             :   /* Verify locale calls for UTF-8 */
      86         952 :   if ( strcmp( locale_charset(), "UTF-8" ) != 0 &&
      87           0 :        strcmp( locale_charset(), "utf-8" ) != 0 ) {
      88           0 :     return false;
      89             :   }
      90             :   return true;
      91             : }
      92             : 
      93         952 : void set_native_locale( void ) {
      94             :   /* Adopt native locale */
      95         952 :   if ( NULL == setlocale( LC_ALL, "" ) ) {
      96           0 :     int saved_errno = errno;
      97           0 :     if ( saved_errno == ENOENT ) {
      98           0 :       LocaleVar ctype( get_ctype() );
      99           0 :       fprintf( stderr, "The locale requested by %s isn't available here.\n", ctype.str().c_str() );
     100           0 :       if ( !ctype.name.empty() ) {
     101           0 :         fprintf( stderr, "Running `locale-gen %s' may be necessary.\n\n",
     102             :                  ctype.value.c_str() );
     103             :       }
     104           0 :     } else {
     105           0 :       errno = saved_errno;
     106           0 :       perror( "setlocale" );
     107             :     }
     108             :   }
     109         952 : }
     110             : 
     111           0 : void clear_locale_variables( void ) {
     112           0 :   unsetenv( "LANG" );
     113           0 :   unsetenv( "LANGUAGE" );
     114           0 :   unsetenv( "LC_CTYPE" );
     115           0 :   unsetenv( "LC_NUMERIC" );
     116           0 :   unsetenv( "LC_TIME" );
     117           0 :   unsetenv( "LC_COLLATE" );
     118           0 :   unsetenv( "LC_MONETARY" );
     119           0 :   unsetenv( "LC_MESSAGES" );
     120           0 :   unsetenv( "LC_PAPER" );
     121           0 :   unsetenv( "LC_NAME" );
     122           0 :   unsetenv( "LC_ADDRESS" );
     123           0 :   unsetenv( "LC_TELEPHONE" );
     124           0 :   unsetenv( "LC_MEASUREMENT" );
     125           0 :   unsetenv( "LC_IDENTIFICATION" );
     126           0 :   unsetenv( "LC_ALL" );
     127           0 : }