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Very secure method to save and restore registry

, 23 Aug 2004
This article gives a very secure method to save and restore registry keys. It provides a ready to use tool in both command-line and UI modes.
// CmdLineParser.h: interface for the CCmdLineParser class.
// 
// Copyright (c) Pavel Antonov, 2002
//
// This code is provided "as is", with absolutely no warranty expressed
// or implied. Any use is at your own risk.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_CMDLINEPARSER_H__BE51B7B0_4BC9_44F1_9B88_DF33BE4280DF__INCLUDED_)
#define AFX_CMDLINEPARSER_H__BE51B7B0_4BC9_44F1_9B88_DF33BE4280DF__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

typedef CString CCmdLineParser_String ;

#include <map>
using std::map;

// Example of strings
// /Key1 /Key2 -Key3:Val3 -Key4:"Val 4-with/spaces/and-delimeters" /Key5:Val5
// /Key:"" is equal to /Key: and is equal to /Key
// /Key is equal to -Key
// If getCaseSensitive is false (by default), all keys are made lowercase.

// Examples of use:
// CCmdLineParser parser(_T("/Key1 /Key2: -Key3:Val3 -Key4:\"Val 4-with/spaces/and-delimeters\" /Key5:Val5"));
// ASSERT(parser.HasKey("Key1") == true);
// ASSERT(parser.HasKey("Key10") == false);
// ASSERT(parser.HasVal("Key2") == false);
// parser.GetVal("Key1") -> []; (empty string)
// parser.GetVal("Key2") -> []; (empty string)
// parser.GetVal("Key3") -> [Val3];
// parser.GetVal("Key4") -> [Val 4-with/spaces/and-delimeters];
// CCmdLineParser::POSITION pos = parser.getFirst();	
// CString sKey, sVal;
// while(!parser.isLast(pos)) {
//		parser.getNext(pos, sKey, sVal);
//		printf("Key: [%s], Val: [%s]");
// }


class CCmdLineParser {
public:
	class CValsMap : public map<CCmdLineParser_String, CCmdLineParser_String> {};
	typedef CValsMap::const_iterator POSITION;
public:
	CCmdLineParser(LPCTSTR sCmdLine = NULL, bool bCaseSensitive = false);
	virtual ~CCmdLineParser();

	bool Parse(LPCTSTR sCmdLine);

	LPCTSTR getCmdLine() const { return m_sCmdLine; }

	void setCaseSensitive(bool bSensitive) { m_bCaseSensitive = bSensitive; }
	bool getCaseSensitive() const { return m_bCaseSensitive; }

	const CValsMap& getVals() const { return m_ValsMap; }

	// Start iterating through keys and values
	POSITION getFirst() const;	
	// Get next key-value pair, returns empty sKey if end reached
	POSITION getNext(POSITION& pos, CCmdLineParser_String& sKey, CCmdLineParser_String& sValue) const;
	// just helper ;)
	bool isLast(POSITION& pos) const;

	// TRUE if "Key" present in command line
	bool HasKey(LPCTSTR sKey) const;
	// Is "key" present in command line and have some value
	bool HasVal(LPCTSTR sKey) const;
	// Returns value if value was found or NULL otherwise
	LPCTSTR GetVal(LPCTSTR sKey) const;
	// Returns true if value was found
	bool GetVal(LPCTSTR sKey, CCmdLineParser_String& sValue) const;

private:
	CValsMap::const_iterator findKey(LPCTSTR sKey) const;
private:
	CCmdLineParser_String m_sCmdLine;
	CValsMap	m_ValsMap;
	bool m_bCaseSensitive;

	static const TCHAR m_sDelimeters[];
	static const TCHAR m_sValueSep[];
	static const TCHAR m_sQuotes[];
};

#endif // !defined(AFX_CMDLINEPARSER_H__BE51B7B0_4BC9_44F1_9B88_DF33BE4280DF__INCLUDED_)

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JOHN11
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France France
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