DarkSide SQL Mini Version 1, The embedded database

/**
Copyright 2000 - 2003 LogicMatrix. All rights reserved. 

This software is distributed under the LogicMatrix Free Software License. This software may be used for any purpose, personal or commercial. Redistributions in binary /source code form are permitted. Commercial redistribution of larger works derived from, or works which bundle this software requires a "Commercial Redistribution License" which can be purchased from LogicMatrix. Contact LogicMatrix for details

Redistributions qualify as Free and non-commercial under one of the following terms:

1) Redistributions are made at no charge beyond the reasonable cost of materials and delivery.
2) Redistributions in binary/source code form must reproduce this Copyright Notice,these license terms, and the disclaimer/limitation of liability set forth as below, in the documentation and/or other materials
provided with the distribution.

Disclaimer
==========
The Software is provided on an "AS IS" basis. No warranty is
provided that the Software is free of defects, or fit for a
particular purpose. 

Limitation of Liability 
=======================
LogicMatrix shall not be liable for any damages suffered by the Licensee or any third party resulting from use of the Software.


**/

/**
	cmpr.h

	Purpose: base comparion services

	Author: Vijay Mathew Pandyalakal
	Date:	16/11/2003
	Copyright: logicmatrix
**/
#ifndef CMPR_H_
#define CMPR_H_


namespace dsqlm {
	
	class Cmpr {
	private:
		vector<Column> vct_cols;
		vector<ComparissonOperator> vct_coprs; // comparison operators
		vector<string> vct_vals; // values to compare
		vector<LogicalOperator> vct_loprs; // logical operators
		vector<long> vct_cur;
		Table *table;
		Database* m_db;
	public:
		Cmpr(Table *table,Database* db,vector<Column> vct_c,
			vector<ComparissonOperator> vct_co,vector<string> vct_v,
			vector<LogicalOperator> vct_lo);
		void run();
		bool compare(const char* val1,const char* val2,DsqlType type,ComparissonOperator copr);
		long getCursorLength();
		long getPos(long idx);
	private:
		bool equals(const char* val1,const char* val2,DsqlType type);
		bool notEquals(const char* val1,const char* val2,DsqlType type);
		bool greaterThan(const char* val1,const char* val2,DsqlType type);
		bool lesserThan(const char* val1,const char* val2,DsqlType type);
		bool greaterThanOrEqualTo(const char* val1,const char* val2,DsqlType type);
		bool lesserThanOrEqualTo(const char* val1,const char* val2,DsqlType type);
		bool like(const char* val1,const char* val2,DsqlType type);

		void removeDuplicates();
	};
}

#endif