69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef __OCEANBASE_SHARE_LIST_PARSER_H__
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#define __OCEANBASE_SHARE_LIST_PARSER_H__
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#include "lib/ob_define.h"
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namespace oceanbase
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{
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namespace share
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{
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class ObListMatchCb
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{
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public:
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virtual int match(const char *value) = 0;
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virtual bool finish() { return true; }
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};
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class ObListParser
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{
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public:
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ObListParser() : SYM_LIST_SEP(','), allow_space_(false), token_(0), cur_(NULL), cb_(NULL) {}
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ObListParser(char list_sep)
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: SYM_LIST_SEP(list_sep), token_(0), cur_(NULL), cb_(NULL) {}
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~ObListParser() = default;
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void set_match_callback(ObListMatchCb &cb) { cb_ = &cb; }
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// Whether to ignore the spaces before and after the value
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void set_allow_space(bool allow) { allow_space_ = allow; }
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int parse(const char *data);
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private:
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int match(int sym);
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int get_token(); // Pre-reading symbol
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private:
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static const int MAX_TOKEN_SIZE = 1024;
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// Symbol table
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static const int SYM_END = 0;
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static const int SYM_KEY = 1;
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static const int SYM_VALUE = 2;
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// Delimiter
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// Can be customized according to different scenarios, such as
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// e.g.1 value1,value2,value3...
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const char SYM_LIST_SEP; // The separator in the middle of value','
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// Temporary variables
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bool allow_space_; // Whether to allow spaces
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int token_;
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char value_buf_[MAX_TOKEN_SIZE];
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const char *cur_;
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// Call back every time a List is parsed
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ObListMatchCb *cb_;
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DISALLOW_COPY_AND_ASSIGN(ObListParser);
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};
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}
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}
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#endif /* __OCEANBASE_SHARE_LIST_PARSER_H__ */
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//// end of header file
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