add more locale string checks beyond case-sensitive "UTF-8" so that we

can better detect UTF-8 locales, adapted from Debian's UTF-8 patch for
slang


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2392 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -252,8 +252,10 @@ CVS code -
   main()
 	- Try to automatically detect whether UTF-8 support is needed by
 	  setting the NO_UTF8 flag if setlocale() returns a string that
-	  doesn't contain "UTF-8".  When using slang 2.x, enable UTF-8
-	  support with SLutf8_enable(). (DLR)
+	  doesn't contain "UTF8" or "UTF-8", case insensitively.  When
+	  using slang 2.x, enable UTF-8 support with SLutf8_enable().
+	  (DLR, string checks beyond case-sensitive "UTF-8" adapted from
+	  Debian's UTF-8 patch for slang)
 - nano.h:
 	- Remove now-unneeded #defines for functions that now have
 	  multibyte equivalents. (DLR)

src/nano.c

@@ -3963,12 +3963,13 @@ int main(int argc, char **argv)
 #ifdef NANO_WIDE
     {
 	/* If the locale set doesn't exist, or it exists but doesn't
-	 * include the string "UTF-8", we shouldn't go into UTF-8
-	 * mode. */
+	 * include the case-insensitive string "UTF8" or "UTF-8", we
+	 * shouldn't go into UTF-8 mode. */
 	char *locale = setlocale(LC_ALL, "");
 
 	if (locale == NULL || (locale != NULL &&
-		strstr(locale, "UTF-8") == NULL))
+		strcasestr(locale, "UTF8") == NULL &&
+		strcasestr(locale, "UTF-8") == NULL))
 	    SET(NO_UTF8);
 
 #ifdef USE_SLANG