1 files changed, 65 insertions, 0 deletions
diff --git a/sql/lex_string.h b/sql/lex_string.h
new file mode 100644
index 00000000000..a5209165be0
--- /dev/null
+++ b/sql/lex_string.h
@@ -0,0 +1,65 @@
+/*
+   Copyright (c) 2018, 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 St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+
+#ifndef LEX_STRING_INCLUDED
+#define LEX_STRING_INCLUDED
+
+typedef struct st_mysql_const_lex_string LEX_CSTRING;
+
+/* Functions to compare if two lex strings are equal */
+
+static inline bool lex_string_cmp(CHARSET_INFO *charset, const LEX_CSTRING *a,
+                                  const LEX_CSTRING *b)
+{
+  return my_strcasecmp(charset, a->str, b->str);
+}
+
+/*
+  Compare to LEX_CSTRING's and return 0 if equal
+*/
+
+static inline bool cmp(const LEX_CSTRING *a, const LEX_CSTRING *b)
+{
+  return (a->length != b->length ||
+          memcmp(a->str, b->str, a->length));
+}
+
+/*
+  Compare if two LEX_CSTRING are equal. Assumption is that
+  character set is ASCII (like for plugin names)
+*/
+
+static inline bool lex_string_eq(const LEX_CSTRING *a, const LEX_CSTRING *b)
+{
+  if (a->length != b->length)
+    return 0;                                   /* Different */
+  return strcasecmp(a->str, b->str) == 0;
+}
+
+/*
+  To be used when calling lex_string_eq with STRING_WITH_LEN() as second
+  argument
+*/
+
+static inline bool lex_string_eq(const LEX_CSTRING *a, const char *b, size_t b_length)
+{
+  if (a->length != b_length)
+    return 0;                                   /* Different */
+  return strcasecmp(a->str, b) == 0;
+}
+
+#endif /* LEX_STRING_INCLUDED */