InitConfigFileParser.hpp

/*
   Copyright (C) 2003-2006, 2008 MySQL AB, 2009 Sun Microsystems, Inc.
    All rights reserved. Use is subject to license terms.

   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, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef InitConfigFileParser_H
#define InitConfigFileParser_H

#include <ndb_global.h>

#include <Properties.hpp>
#include <ConfigValues.hpp>

class Config;
class ConfigInfo;

class InitConfigFileParser {
public:
  InitConfigFileParser();
  ~InitConfigFileParser();

  Config * parseConfig(FILE * file);
  Config * parseConfig(const char * filename);
  Config * parse_mycnf();

  enum ContextSectionType { Undefined, Section, DefaultSection };

  struct Context {
    Context(const ConfigInfo *);
    ~Context();

    ContextSectionType  type; 
    char          fname[256]; 
    char          pname[256]; 
    Uint32          m_lineno; 
    Uint32   m_sectionLineno; 

    const ConfigInfo * m_info;           // The config info
    Properties * m_config;               // The config object
    Properties * m_defaults;             // The user defaults
    
    Properties       * m_currentSection; // The current section I'm in
    const Properties * m_userDefaults;   // The defaults of this section
    const Properties * m_systemDefaults; // The syst. defaults for this section
    const Properties * m_currentInfo;    // The "info" for this section
    
    Properties         m_userProperties; // User properties (temporary values)
    ConfigValuesFactory m_configValues;  //

  public:
    void reportError(const char * msg, ...)
      ATTRIBUTE_FORMAT(printf, 2, 3);
    void reportWarning(const char * msg, ...)
      ATTRIBUTE_FORMAT(printf, 2, 3);
  };

  static bool convertStringToUint64(const char* s, Uint64& val, Uint32 log10base = 0);
  static bool convertStringToBool(const char* s, bool& val);

private:
  bool isEmptyLine(const char* line) const;

  char* parseSectionHeader(const char* line) const;

  char* parseDefaultSectionHeader(const char* line) const;
  
  bool parseNameValuePair(Context&, const char* line);
  bool storeNameValuePair(Context&, const char* fname, const char* value);
  
  bool storeSection(Context&);

  const Properties* getSection(const char * name, const Properties* src); 
  
  ConfigInfo* m_info;

  bool handle_mycnf_defaults(Vector<struct my_option>& options,
                             InitConfigFileParser::Context& ctx, 
                             const char * name);
  
  bool load_mycnf_groups(Vector<struct my_option> & options,
                         InitConfigFileParser::Context& ctx,
                         const char * name,
                         const char *groups[]);

  bool store_in_properties(Vector<struct my_option>& options, 
                           InitConfigFileParser::Context& ctx,
                           const char * name);
  
  Config* run_config_rules(Context& ctx);
};

#endif // InitConfigFileParser_H