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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 18:07:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 18:07:14 +0000
commita175314c3e5827eb193872241446f2f8f5c9d33c (patch)
treecd3d60ca99ae00829c52a6ca79150a5b6e62528b /sql/sql_digest_stream.h
parentInitial commit. (diff)
downloadmariadb-10.5-a175314c3e5827eb193872241446f2f8f5c9d33c.tar.xz
mariadb-10.5-a175314c3e5827eb193872241446f2f8f5c9d33c.zip
Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sql/sql_digest_stream.h')
-rw-r--r--sql/sql_digest_stream.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/sql/sql_digest_stream.h b/sql/sql_digest_stream.h
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+/* Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
+
+ 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,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#ifndef SQL_DIGEST_STREAM_H
+#define SQL_DIGEST_STREAM_H
+
+#include "sql_digest.h"
+
+/**
+ State data storage for @c digest_start, @c digest_add_token.
+ This structure extends the @c sql_digest_storage structure
+ with temporary state used only during parsing.
+*/
+struct sql_digest_state
+{
+ /**
+ Index, in the digest token array, of the last identifier seen.
+ Reduce rules used in the digest computation can not
+ apply to tokens seen before an identifier.
+ @sa digest_add_token
+ */
+ int m_last_id_index;
+ sql_digest_storage m_digest_storage;
+
+ inline void reset(unsigned char *token_array, uint length)
+ {
+ m_last_id_index= 0;
+ m_digest_storage.reset(token_array, length);
+ }
+
+ inline bool is_empty()
+ {
+ return m_digest_storage.is_empty();
+ }
+};
+typedef struct sql_digest_state sql_digest_state;
+
+#endif
+