1 files changed, 68 insertions, 0 deletions
diff --git a/wcsmbs/mbsncmp.c b/wcsmbs/mbsncmp.c
new file mode 100644
index 0000000000..43fb527afb
--- /dev/null
+++ b/wcsmbs/mbsncmp.c
@@ -0,0 +1,68 @@
+/* Copyright (C) 1995 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.	 If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <mbstr.h>
+#include <stdlib.h>
+
+#define __need_wchar_t
+/* FIXME: should be defined in stddef.h.
+!!! #define __need_uwchar_t  */
+typedef unsigned int uwchar_t;
+#include <stddef.h>
+
+
+/* Compare N characters of MBS1 and MBS2.  */
+int
+mbsncmp (mbs1, mbs2, n)
+    const char *mbs1;
+    const char *mbs2;
+    size_t n;
+{
+  size_t len = 0;
+  int clen1 = 0;
+  int clen2 = 0;
+  uwchar_t c1;
+  uwchar_t c2;
+
+  if (n == 0)
+    return 0;
+
+  /* Reset multibyte characters to their initial state.	 */
+  (void) mblen ((char *) NULL, 0);
+
+  do
+    {
+      clen1 = mbtowc ((wchar_t *) &c1, mbs1, MB_CUR_MAX);
+      clen2 = mbtowc ((wchar_t *) &c2, mbs2, MB_CUR_MAX);
+
+      if (clen1 == 0)
+	return clen2 == 0 ? 0 : -1;
+      if (clen2 == 0)
+	return 1;
+      if (clen1 < 0 || clen2 < 0)
+	/* FIXME: an illegal character appears.	 What to do?  */
+	return c1 - c2;
+
+      mbs1 += clen1;
+      mbs2 += clen2;
+    }
+  while (c1 == c2 && ++len < n);
+
+  return len < n ? c1 - c2 : 0;
+}
+