fconame.h

fconame.h (text/plain), 8.47 KB, created by Nicolas on 2009-11-17 17:45:44 UTC

//
// The developer of the original code and/or files is Tripwire, Inc.
// Portions created by Tripwire, Inc. are copyright (C) 2000 Tripwire,
// Inc. Tripwire is a registered trademark of Tripwire, Inc.  All rights
// reserved.
// 
// This program is free software.  The contents of this file are subject
// to the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.  You may redistribute it and/or modify it
// only in compliance with the GNU General Public License.
// 
// This program is distributed in the hope that it will be useful.
// However, this program is distributed AS-IS WITHOUT ANY
// WARRANTY; INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
// FOR A PARTICULAR PURPOSE.  Please see the GNU General Public License
// for more details.
// 
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// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 
// Nothing in the GNU General Public License or any other license to use
// the code or files shall permit you to use Tripwire's trademarks,
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// If you have any questions, please contact Tripwire, Inc. at either
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//
///////////////////////////////////////////////////////////////////////////////
// fconame.h
//
// cFCOName -- represents the name of an FCO
#ifndef __FCONAME_H
#define __FCONAME_H

#ifndef __SERIALIZABLE_H
#include "core/serializable.h"
#endif
#ifndef __FCONAMEINFO_H
#include "fconameinfo.h"
#endif

///////////////////////////////////////////////////////////////////////////////
// class cFCOName -- How we name a FCO.  The implementation has ended up being
//      a wrapper around a standard string.
///////////////////////////////////////////////////////////////////////////////
class cFCONameTblNode;
class cFCONameIter;

class cFCOName : public iTypedSerializable
{
	DECLARE_TYPEDSERIALIZABLE()

public:
	typedef cFCONameIter iterator;

    cFCOName(iFCONameInfo* iNI = NULL);
    cFCOName(const cFCOName& rhs);

    explicit cFCOName(const TSTRING& rhs, iFCONameInfo* iNI = NULL); 
    explicit cFCOName(const TCHAR* rhs, iFCONameInfo* iNI = NULL);
		// these ctors are explicit because it is expensive to create these things, so we don't want to
		// do it unexpectedly
    virtual ~cFCOName();

    void operator = (const cFCOName& rhs);
    void operator = (const TSTRING& rhs);
    void operator = (const TCHAR* rhs);

	bool operator < (const cFCOName& rhs) const;
		// defines an arbitrary order for cFCONames. This is so that names can 
		// be stored in trees and other ordered data structures in order to facilitate
		// fast lookups.

	bool operator ==		(const cFCOName& rhs) const;
	bool operator !=		(const cFCOName& rhs) const;
    bool            IsEqual	(const cFCOName& rhs) const;
		// both of these are synonyms for (GetRelationship(rhs) == REL_EQUAL)
	
	TSTRING			AsString() const;
		// return a string representation of the string

	bool			IsCaseSensitive() const;
	void			SetCaseSensitive(bool val);
		// determines how name comparisons are done. If two cFCONames are compared who are
		// both case insensitive, a case insensitive compare is done. If both are case sensitive, 
		// a case sensitive compare is done. If one is and one isn't case sensitive (? TODO: what 
		// is the right thing to do in this case? ASSERT(0)? do a case sensitive compare??)
	TCHAR			GetDelimiter() const;
	void			SetDelimiter(TCHAR delimiter);
		// defines what the path-delimiting character is

	void			Push(const TSTRING& str);
		// pushes the named string onto the end of the path. A delimiter is implicitely placed between the old end
		// and the new string. if debug is defined, it is asserted that the new string does not contain the 
		// delimiting character
 	const TCHAR*	Pop();
		// removes the last part of the path from the name and returns it. ASSERTS and returns an undefined value if
		// the path is empty
	const TCHAR*	PopFront();
		// removes the first part of the path from the name and returns it. ASSERTS and returns an undefined value if
		// the path is empty
	void			Clear();
		// removes all elements from the name; after this, GetSize() == 0.
	const TCHAR*	GetShortName() const;
		// this will return the final string in the vector. It will assert that the name is not empty.
	int				GetSize() const;
		// returns the number of path items (strings between delimiters) that are in the fco name. It is always equal
		// to the number of delimiters in the path plus one.
	
	enum Relationship
	{
		REL_BELOW,		// an fco is below another	(/etc/passwd is below /etc)
		REL_ABOVE,		// an fco is above another	(/etc is above /etc/passwd)
		REL_EQUAL,		// the fcos are equal		(/etc/passwd is equal to /etc/passwd)
		REL_UNRELATED	// the fcos are unrelated	(/var/spool/mail is unrelated to /var/log/pig.log)
	};
	Relationship GetRelationship(const cFCOName& rhs) const;
		// returns the relationship of _this_ name to the one passed in (ie -- if REL_BELOW is returned,
		// this fco name is below the one passed in)

	virtual void Read (iSerializer* pSerializer, int32 version = 0); // throw (eSerializer, eArchive)
	virtual void Write(iSerializer* pSerializer) const;	// throw (eSerializer, eArchive)

	//////////////////////////////////
	// Debugging method
	//////////////////////////////////
	static void ClearNameTable();
		// this method should _only_ be called when the program is exiting, and you are positively sure you 
		// will not be using or creating any more cFCONames. Violating this rule will result in unpredictable
		// results. This clears out the cFCOName internal name table, making memory leaks easier to find.
protected:
	friend class cFCOName_i;
	friend class cFCONameIter;

	void ParseString(const TCHAR* str);
		// helper function that takes the pathname pointer to by str and fills out mpPathName
	void CopyOnModify();
		// if the fconame is modified and mpPathName is shared by more than one object, this will 
		// release mpPathName and create a new one, so we don't change any other object's data
    void SetNameInfo(iFCONameInfo* pNI);
        // sets the delimiter and case sensitiveness to the name info's

	cFCOName_i*			mpPathName;
	TCHAR				mDelimiter;			// the delimiting character in names (ie -- in file systems, it is '/')
	bool				mbCaseSensitive;	// determines whether name compares are case sensitive of not

	// this is what type of structure holds the elements of the name
	//
	typedef std::vector<cFCONameTblNode*> ListType;

#ifdef _DEBUG
    TSTRING             mDebugStrName; // so we can see this guy's value in the debug window
#endif 
};

//-----------------------------------------------------------------------------
// cFCONameIter
//-----------------------------------------------------------------------------
class cFCONameIter_i;
class cFCONameIter
{
public:
	cFCONameIter(const cFCOName& name);
	~cFCONameIter();

	int				GetSize() const;	// returns the number of entries in the fco name
	void			SeekBegin();
	void			Next();
	void			Prev();
	bool			Done() const;

	int				Index() const;
		// return the current offset from the beginning of the short name list
	void			SeekTo( int index );
		// seeks to the given index. asserts that the index is appropriate for the
		// current fco name.

	const TCHAR*	GetName() const;
private:
	void operator=(const cFCONameIter& rhs);	// not impl
	cFCONameIter(const cFCONameIter& rhs);		// not impl

	// the data...
	//
	const cFCOName&						mName;
	cFCOName::ListType::const_iterator	mIter;
};

//#############################################################################
// inline implementation
inline bool cFCOName::IsCaseSensitive() const
{
	return mbCaseSensitive;
}
inline void cFCOName::SetCaseSensitive(bool val)
{
	mbCaseSensitive = val;
}
inline TCHAR cFCOName::GetDelimiter() const
{
	return mDelimiter;
}
inline void cFCOName::SetDelimiter(TCHAR delimiter)
{
	mDelimiter = delimiter;
}

///////////////////////////////////////////////////////////////////////////////
// IsEqual
///////////////////////////////////////////////////////////////////////////////
inline bool cFCOName::IsEqual(const cFCOName& rhs) const
{
	return (GetRelationship(rhs) == cFCOName::REL_EQUAL);
}

inline bool cFCOName::operator==(const cFCOName& rhs) const
{
	return IsEqual(rhs);
}
inline bool cFCOName::operator!=(const cFCOName& rhs) const
{
	return (! IsEqual(rhs));
}


#endif //__FCONAME_H