Move some locale handling into one place

src/util/Makefile.am

@@ -2,4 +2,4 @@ AM_CXXFLAGS = $(WARNING_CXXFLAGS) $(PICKY_CXXFLAGS) -fno-default-inline -pipe
 
 noinst_LIBRARIES = libmoshutil.a
 
-libmoshutil_a_SOURCES = swrite.cc swrite.h dos_assert.h fatal_assert.h
+libmoshutil_a_SOURCES = locale_utils.cc locale_utils.h swrite.cc swrite.h dos_assert.h fatal_assert.h

src/util/locale_utils.cc

@@ -0,0 +1,46 @@
+/*
+    Mosh: the mobile shell
+    Copyright 2012 Keith Winstein
+
+    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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <locale.h>
+
+#if HAVE_LANGINFO_H
+#include <langinfo.h>
+#endif
+
+#include "locale_utils.h"
+
+void assert_utf8_locale( void ) {
+  /* Verify locale calls for UTF-8 */
+  if ( strcmp( nl_langinfo( CODESET ), "UTF-8" ) != 0 ) {
+    fprintf( stderr, "mosh requires a UTF-8 locale.\n" );
+    exit( 1 );
+  }
+}
+
+void set_native_locale( void ) {
+  /* Adopt native locale */
+  if ( NULL == setlocale( LC_ALL, "" ) ) {
+    perror( "setlocale" );
+    exit( 1 );
+  }
+}

src/util/locale_utils.h

@@ -0,0 +1,25 @@
+/*
+    Mosh: the mobile shell
+    Copyright 2012 Keith Winstein
+
+    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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef LOCALE_UTILS_HPP
+#define LOCALE_UTILS_HPP
+
+void assert_utf8_locale( void );
+void set_native_locale( void );
+
+#endif