stringptr.h

Java写的文本编辑器

/*
 * StringPtr.h - part of jEditLauncher package
 * Copyright (C) 2001 John Gellene
 * [e-mail]
 *
 * 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 2
 * of the License, or any later version.
 *
 * Notwithstanding the terms of the General Public License, the author grants
 * permission to compile and link object code generated by the compilation of
 * this program with object code and libraries that are not subject to the
 * GNU General Public License, provided that the executable output of such
 * compilation shall be distributed with source code on substantially the
 * same basis as the jEditLauncher package of which this program is a part.
 * By way of example, a distribution would satisfy this condition if it
 * included a working makefile for any freely available make utility that
 * runs on the Windows family of operating systems. This condition does not
 * require a licensee of this software to distribute any proprietary software
 * (including header files and libraries) that is licensed under terms
 * prohibiting redistribution to third parties.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id: StringPtr.h,v 1.1.1.1 2001/07/03 13:14:11 jgellene Exp $
 *
 * NOTE: this is a convenience wrapper class that works with the CString class
 * in the Windows Template Library (it should also work with the MFC CString
 * class with a conforming modification to the definition of the 's' data
 * member. The effect of the template is to insert inline code that create a
 * buffer of a length specified by the template parameter and attach it to
 * the CString object. The destructor releases the buffer. The only caution
 * is that calling methods on the underlying CString object during the lifetime
 * of the CStringBuf object will lead to unpredictable results. This
 * circumstance is no different than the result of calling a WTL/MFC CString
 * function after a call to its GetBuffer() menthod and before a call to the
 * corresponding ReleaseBuffer().
 *
 */

// StringBuf.h: interface for the CStringBuf class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_STRINGPTR_H__5DC3BF27_5163_4036_81DF_5E15DCFDAF0E__INCLUDED_)
#define AFX_STRINGPTR_H__5DC3BF27_5163_4036_81DF_5E15DCFDAF0E__INCLUDED_

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

template<size_t S = 255>
class CStringBuf
{
public:
	CStringBuf(WTL::CString& str)
		: s(str), p(str.GetBuffer(S)) {}
	~CStringBuf() {
		Release();
	}
	void Activate() {
		if(p == 0) p = str.GetBuffer(S);
	}
	void Release() {
		if(p != 0) s.ReleaseBuffer(); p = 0;
	}
	size_t Size() {
		return S;
	}
	operator TCHAR*() {
		return p;
	}
	operator LPARAM() {
		return (LPARAM)p;
	}
	operator LPBYTE() {
		return (LPBYTE)p;
	}
private:
	WTL::CString& s;
	TCHAR* p;
};

#endif // !defined(AFX_STRINGPTR_H__5DC3BF27_5163_4036_81DF_5E15DCFDAF0E__INCLUDED_)