1 files changed, 77 insertions, 0 deletions
diff --git a/lib/sh/mbscmp.c b/lib/sh/mbscmp.c
new file mode 100644
index 0000000..c7c8443
--- /dev/null
+++ b/lib/sh/mbscmp.c
@@ -0,0 +1,77 @@
+/* mbscmp - multibyte string comparison. */
+
+/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#if !defined (HAVE_MBSCMP) && defined (HANDLE_MULTIBYTE)
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+
+extern int locale_utf8locale;
+
+extern int utf8_mbscmp (const char *, const char *);
+
+/* Compare MBS1 and MBS2.  */
+int
+mbscmp (mbs1, mbs2)
+    const char *mbs1;
+    const char *mbs2;
+{
+  int len1, len2, mb_cur_max;
+  wchar_t c1, c2;
+
+  len1 = len2 = 0;
+  /* Reset multibyte characters to their initial state.	 */
+  (void) mblen ((char *) NULL, 0);
+
+  mb_cur_max = MB_CUR_MAX;
+  do
+    {
+      len1 = mbtowc (&c1, mbs1, mb_cur_max);
+      len2 = mbtowc (&c2, mbs2, mb_cur_max);
+
+      if (len1 == 0)
+	return len2 == 0 ? 0 : -1;
+      else if (len2 == 0)
+	return 1;
+      else if (len1 > 0 && len2 < 0)
+        return -1;
+      else if (len1 < 0 && len2 > 0)
+        return 1;
+      else if (len1 < 0 && len2 < 0)
+	{
+	  len1 = strlen (mbs1);
+	  len2 = strlen (mbs2);
+	  return (len1 == len2 ? memcmp (mbs1, mbs2, len1)
+			       : ((len1 < len2) ? (memcmp (mbs1, mbs2, len1) > 0 ? 1 : -1)
+						: (memcmp (mbs1, mbs2, len2) >= 0 ? 1 : -1)));
+	}
+
+      mbs1 += len1;
+      mbs2 += len2;
+    }
+  while (c1 == c2);
+
+  return c1 - c2;
+}
+
+#endif