forked from StoneAtom/StoneDB
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/* Copyright (c) 2008, 2021, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
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#ifndef SQL_DIGEST_STREAM_H
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#define SQL_DIGEST_STREAM_H
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#include "sql_digest.h"
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/**
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State data storage for @c digest_start, @c digest_add_token.
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This structure extends the @c sql_digest_storage structure
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with temporary state used only during parsing.
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*/
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struct sql_digest_state
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{
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/**
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Index, in the digest token array, of the last identifier seen.
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Reduce rules used in the digest computation can not
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apply to tokens seen before an identifier.
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@sa digest_add_token
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*/
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int m_last_id_index;
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sql_digest_storage m_digest_storage;
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inline void reset(unsigned char *token_array, uint length)
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{
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m_last_id_index= 0;
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m_digest_storage.reset(token_array, length);
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}
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inline bool is_empty()
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{
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return m_digest_storage.is_empty();
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}
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};
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typedef struct sql_digest_state sql_digest_state;
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#endif
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