/*
    
	The Meta_File class can be used independently or as part of the MiniDB project.

    Copyright (C) 2007  Hossein Hakimzadeh

	Comments and bug fixes can be sent to hhakimza@iusb.edu

    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, either version 3 of the License, or
    (at your option) any later version.

    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, see <http://www.gnu.org/licenses/>.

*/


#ifndef META_FILE_H
#define META_FILE_H

#define CLOSED           0
#define OPEN_FOR_READ    1
#define OPEN_FOR_WRITE   2
#define FALSE            0
#define TRUE             1
#define ON               1
#define OFF              0


class Meta_File
{
	char          FileName[256];             // *.dta
	char          RecordSeparator;           // defaulted to '~'
	char          FieldSeparator;            // defaulted to '^'
	char          TagSeparator;
	unsigned long CurrentFileLocation;
	unsigned long EOFLocation;
	int           Verbose;                   // Verbose flag (ON / OFF)

  public:
	Meta_File(char *filename, char field_separator, char record_separator, char tag_separator);//Constructor
	~Meta_File();                                       // Destructor
	
	
	void SetRecordSeparator(char separator);            // Default separator = '~'
	void SetFieldSeparator(char separator);             // Default separator = '^'
	void SetTagSeparator(char separator);               // Default separator = '='

	void Initialize(void);

	unsigned long SetCurrentFileLocation(unsigned long );
	unsigned long FileSize();

	int  WriteMetaTag(char *a_tag);                     // Write/Append a meta-tag
	int  WriteMetaRecord(char *a_record);               // Write/Append a record

	int  WriteXMLMetaTag(char *a_tag);                  // Write/Append a meta-tag
	int  WriteXMLMetaRecord(char *a_record);            // Write/Append a record
	
	int  ReadMetaTag(char *a_tag);
	int  ReadMetaRecord(char *a_record);

	int  UnPackRecord(char *a_record, char *fields[]);  // UnPack the record into separate fields
	int  PackRecord(char *a_record, char *fields[]);    // Pack the Fields into a record
    void DumpMetaFile(void);
};


#endif