lib/i18n: Move strncols to i18n.c

[petitboot] / lib / i18n / i18n.c

diff --git a/lib/i18n/i18n.c b/lib/i18n/i18n.c
new file mode 100644 (file)
index 0000000..dd8d79b
--- /dev/null
+++ b/lib/i18n/i18n.c
@@ -0,0 +1,50 @@
+/*
+ *  Copyright (C) 2013 IBM Corporation
+ *
+ *  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; version 2 of the License.
+ *
+ *  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, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define _XOPEN_SOURCE
+
+#include <string.h>
+#include <stdlib.h>
+#include <wchar.h>
+
+#include <i18n/i18n.h>
+
+/* Return the number of columns required to display a localised string */
+int strncols(const char *str)
+{
+       int wlen, ncols;
+       wchar_t *wstr;
+
+       wlen = mbstowcs(NULL, str, 0);
+       if (wlen <= 0)
+               return wlen;
+
+       wstr = malloc(sizeof(wchar_t) * wlen + 1);
+       if (!wstr)
+               return -1;
+
+       wlen = mbstowcs(wstr, str, wlen);
+       if (wlen <= 0) {
+               free(wstr);
+               return wlen;
+       }
+
+       ncols = wcswidth(wstr, wlen);
+
+       free(wstr);
+       return ncols;
+}