1 files changed, 99 insertions, 0 deletions
diff --git a/src/utf8.c b/src/utf8.c
new file mode 100644
index 0000000..195fef5
--- /dev/null
+++ b/src/utf8.c
@@ -0,0 +1,99 @@
+/* Charset handling for GNU tar.
+
+   Copyright 2004, 2006-2007, 2013-2014, 2016 Free Software Foundation,
+   Inc.
+
+   This file is part of GNU tar.
+
+   GNU tar 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.
+
+   GNU tar 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 <system.h>
+#include <quotearg.h>
+#include <localcharset.h>
+#include "common.h"
+#ifdef HAVE_ICONV_H
+# include <iconv.h>
+#endif
+
+#ifndef ICONV_CONST
+# define ICONV_CONST
+#endif
+
+#ifndef HAVE_ICONV
+
+# undef iconv_open
+# define iconv_open(tocode, fromcode) ((iconv_t) -1)
+
+# undef iconv
+# define iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft) ((size_t) 0)
+
+# undef iconv_close
+# define iconv_close(cd) 0
+
+#endif
+
+
+
+
+static iconv_t conv_desc[2] = { (iconv_t) -1, (iconv_t) -1 };
+
+static iconv_t
+utf8_init (bool to_utf)
+{
+  if (conv_desc[(int) to_utf] == (iconv_t) -1)
+    {
+      if (to_utf)
+	conv_desc[(int) to_utf] = iconv_open ("UTF-8", locale_charset ());
+      else
+	conv_desc[(int) to_utf] = iconv_open (locale_charset (), "UTF-8");
+    }
+  return conv_desc[(int) to_utf];
+}
+
+bool
+utf8_convert (bool to_utf, char const *input, char **output)
+{
+  char ICONV_CONST *ib;
+  char *ob;
+  size_t inlen;
+  size_t outlen;
+  size_t rc;
+  iconv_t cd = utf8_init (to_utf);
+
+  if (cd == 0)
+    {
+      *output = xstrdup (input);
+      return true;
+    }
+  else if (cd == (iconv_t)-1)
+    return false;
+
+  inlen = strlen (input) + 1;
+  outlen = inlen * MB_LEN_MAX + 1;
+  ob = *output = xmalloc (outlen);
+  ib = (char ICONV_CONST *) input;
+  rc = iconv (cd, &ib, &inlen, &ob, &outlen);
+  *ob = 0;
+  return rc != -1;
+}
+
+
+bool
+string_ascii_p (char const *p)
+{
+  for (; *p; p++)
+    if (*p & ~0x7f)
+      return false;
+  return true;
+}