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-rw-r--r--sql/field_comp.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/sql/field_comp.h b/sql/field_comp.h
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+#ifndef FIELD_COMP_H_INCLUDED
+#define FIELD_COMP_H_INCLUDED
+/* Copyright (C) 2017 MariaDB Foundation
+
+ 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 */
+
+
+#define MAX_COMPRESSION_METHODS 16
+
+struct Compression_method
+{
+ const char *name;
+ uint (*compress)(THD *thd, char *to, const char *from, uint length);
+ int (*uncompress)(String *to, const uchar *from, uint from_length,
+ uint field_length);
+};
+
+
+extern Compression_method compression_methods[MAX_COMPRESSION_METHODS];
+#define zlib_compression_method (&compression_methods[8])
+
+#endif