MDEV-26669 Add MY_COLLATION_HANDLER functions min_str() and max_str()

strings/ctype-simple.h

@@ -0,0 +1,37 @@
+#ifndef CTYPE_SIMPLE_INCLUDED
+#define CTYPE_SIMPLE_INCLUDED
+/* Copyright (C) 2021 MariaDB 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+/* This file is to be include first in all files in the string directory */
+
+#undef DBUG_ASSERT_AS_PRINTF
+#include <my_global.h>		/* Define standard vars */
+#include "m_string.h"		/* Exernal definitions of string functions */
+
+
+size_t
+my_min_str_8bit_simple(CHARSET_INFO *cs,
+                       uchar *dst, size_t dst_size, size_t nchars);
+
+size_t
+my_min_str_8bit_simple_nopad(CHARSET_INFO *cs,
+                             uchar *dst, size_t dst_size, size_t nchars);
+
+size_t
+my_max_str_8bit_simple(CHARSET_INFO *cs,
+                       uchar *dst, size_t dst_size, size_t nchars);
+
+#endif /*CTYPE_SIMPLE_INCLUDED */