sql_bootstrap.h

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/* Copyright (c) 2010, 2024, Oracle and/or its affiliates.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
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   as designated in a particular file or component or in included license
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   permission to link the program and your derivative works with the
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   the program or referenced in the documentation.
 
   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, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef SQL_BOOTSTRAP_H
#define SQL_BOOTSTRAP_H
 
#include <stddef.h>
#include <functional>
 
#include "map_helpers.h"
 
struct MYSQL_FILE;
 
/**
  The maximum size of a bootstrap query.
  Increase this size if parsing a longer query during bootstrap is necessary.
  The longest query in use depends on the documentation content,
  see the file fill_help_tables.sql
*/
#define MAX_BOOTSTRAP_QUERY_SIZE 74000
/**
  The maximum size of a bootstrap query, expressed in a single line.
  Do not increase this size, use the multiline syntax instead.
*/
#define MAX_BOOTSTRAP_LINE_SIZE 74000
 
enum bootstrap_error {
  READ_BOOTSTRAP_SUCCESS = 0,
  READ_BOOTSTRAP_EOF,
  READ_BOOTSTRAP_IO,
  READ_BOOTSTRAP_DELIMITER,
  READ_BOOTSTRAP_SQ_NOT_TERMINATED,
  READ_BOOTSTRAP_DQ_NOT_TERMINATED,
  READ_BOOTSTRAP_COMMENT_NOT_TERMINATED,
  READ_BOOTSTRAP_QUERY_SIZE,
  READ_BOOTSTRAP_ERROR
};
 
typedef char *(*fgets_fn_t)(char *, size_t, MYSQL_FILE *, int *error);
 
enum delimiter_state {
  /** Delimiter is ';' */
  DELIMITER_SEMICOLON,
  /** Delimiter is "$$" */
  DELIMITER_DOLLAR_DOLLAR
};
 
enum code_parsing_state {
  /** Parsing sql code. */
  NORMAL,
  /** Parsing a 'literal' string. */
  IN_SINGLE_QUOTE,
  /** Parsing a "literal" string. */
  IN_DOUBLE_QUOTE,
  /** Parsing a "--" comment. */
  IN_DASH_DASH_COMMENT,
  /** Parsing a '/''*' comment. */
  IN_SLASH_STAR_COMMENT,
  /** Parsing a '#' comment. */
  IN_POUND_COMMENT
};
 
struct bootstrap_parser_position {
  void init();
 
  size_t m_line;
  size_t m_column;
};
 
struct bootstrap_parser_state {
  // This buffer may be rather large,
  // so we allocate it on the heap to save stack space.
  // This struct is also used by the standalone 'comp_sql' tool,
  // so we use plain malloc/free rather than my_() to avoid dependency on mysys.
  unique_ptr_free<char> m_unget_buffer;
  size_t m_unget_buffer_length;
 
  typedef void (*log_function_t)(const char *message);
 
  void init(const char *filename);
  void report_error_details(log_function_t log);
 
  delimiter_state m_delimiter;
  code_parsing_state m_code_state;
 
  const char *m_filename;
  size_t m_current_line;
  enum bootstrap_error m_last_error;
  int m_io_sub_error;
 
  bootstrap_parser_position m_last_delimiter;
  bootstrap_parser_position m_last_open_single_quote;
  bootstrap_parser_position m_last_open_double_quote;
  bootstrap_parser_position m_last_open_comment;
  bootstrap_parser_position m_last_query_start;
};
 
int read_bootstrap_query(char *query, size_t *query_length, MYSQL_FILE *input,
                         fgets_fn_t fgets_fn, bootstrap_parser_state *state);
 
#endif