1 files changed, 68 insertions, 0 deletions
diff --git a/REORG.TODO/stdlib/mblen.c b/REORG.TODO/stdlib/mblen.c
new file mode 100644
index 0000000000..b98bb915e4
--- /dev/null
+++ b/REORG.TODO/stdlib/mblen.c
@@ -0,0 +1,68 @@
+/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <gconv.h>
+#include <wcsmbs/wcsmbsload.h>
+
+
+/* Internal state.  */
+static mbstate_t state;
+
+/* Return the length of the multibyte character (if there is one)
+   at S which is no longer than N characters.
+   The ISO C standard says that the `mblen' function must not change
+   the state of the `mbtowc' function.  */
+int
+mblen (const char *s, size_t n)
+{
+  int result;
+
+  /* If S is NULL the function has to return null or not null
+     depending on the encoding having a state depending encoding or
+     not.  */
+  if (s == NULL)
+    {
+      const struct gconv_fcts *fcts;
+
+      /* Get the conversion functions.  */
+      fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
+
+      /* Reset the state.  */
+      memset (&state, '\0', sizeof state);
+
+      result = fcts->towc->__stateful;
+    }
+  else if (*s == '\0')
+    /* According to the ISO C 89 standard this is the expected behaviour.  */
+    result = 0;
+  else
+    {
+      memset (&state, '\0', sizeof state);
+
+      result = __mbrtowc (NULL, s, n, &state);
+
+      /* The `mbrtowc' functions tell us more than we need.  Fold the -1
+	 and -2 result into -1.  */
+      if (result < 0)
+	result = -1;
+    }
+
+  return result;
+}