1 /* Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; version 2 of the License. 6 7 This program is distributed in the hope that it will be useful, 8 but WITHOUT ANY WARRANTY; without even the implied warranty of 9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 GNU General Public License for more details. 11 12 You should have received a copy of the GNU General Public License 13 along with this program; if not, write to the Free Software Foundation, 14 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ 15 16 #ifndef SQL_DIGEST_STREAM_H 17 #define SQL_DIGEST_STREAM_H 18 19 #include "sql_digest.h" 20 21 /** 22 State data storage for @c digest_start, @c digest_add_token. 23 This structure extends the @c sql_digest_storage structure 24 with temporary state used only during parsing. 25 */ 26 struct sql_digest_state 27 { 28 /** 29 Index, in the digest token array, of the last identifier seen. 30 Reduce rules used in the digest computation can not 31 apply to tokens seen before an identifier. 32 @sa digest_add_token 33 */ 34 int m_last_id_index; 35 sql_digest_storage m_digest_storage; 36 resetsql_digest_state37 inline void reset(unsigned char *token_array, uint length) 38 { 39 m_last_id_index= 0; 40 m_digest_storage.reset(token_array, length); 41 } 42 is_emptysql_digest_state43 inline bool is_empty() 44 { 45 return m_digest_storage.is_empty(); 46 } 47 }; 48 typedef struct sql_digest_state sql_digest_state; 49 50 #endif 51 52