maint: update copyright

[gnulib.git] / lib / wcwidth.c

diff --git a/lib/wcwidth.c b/lib/wcwidth.c
index 6317083..d7837bb 100644 (file)
--- a/lib/wcwidth.c
+++ b/lib/wcwidth.c
@@ -1,10 +1,10 @@
 /* Determine the number of screen columns needed for a character.
-   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2006-2007, 2010-2014 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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 2, or (at your option)
-   any later version.
+   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
@@ -12,19 +12,39 @@
    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, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 
 /* Specification.  */
-#include "wcwidth.h"
+#include <wchar.h>
 
 /* Get iswprint.  */
 #include <wctype.h>
 
+#include "localcharset.h"
+#include "streq.h"
+#include "uniwidth.h"
+
 int
-rpl_wcwidth (wchar_t wc)
+wcwidth (wchar_t wc)
+#undef wcwidth
 {
-  return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
+  /* In UTF-8 locales, use a Unicode aware width function.  */
+  const char *encoding = locale_charset ();
+  if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0 ,0))
+    {
+      /* We assume that in a UTF-8 locale, a wide character is the same as a
+         Unicode character.  */
+      return uc_width (wc, encoding);
+    }
+  else
+    {
+      /* Otherwise, fall back to the system's wcwidth function.  */
+#if HAVE_WCWIDTH
+      return wcwidth (wc);
+#else
+      return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
+#endif
+    }
 }