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Posted 28 May 2001

CString-clone Using Standard C++

, 7 Dec 2011
A Drop-In replacement for CString that builds on the Standard C++ Library's basic_string template
// TestString.cpp : Defines the entry point for the console application.

#include "stdafx.h"
#include "StdString.h"
#include <map>
#include "resource.h"

int main(int argc, char* argv[])
	// You can add just about any form of string to a CStdString
	// with operator+()
	CStdString strVal1(_T("THIS IS A STRING   "));
	OutputDebugString(strVal1 + _T("\n"));
	strVal1 += _bstr_t(" plus a BSTR string");
	strVal1 += '.' ;

	// Some conversion functions can be chained together


	// Case INsensitive comparison via Equals() or CompareNoCase()

	strVal1 = _T("THIS IS A STRING");
	CStdString strVal2(_T("thIs Is a sTRing"));
	_ASSERTE(strVal1 != strVal2);
	_ASSERTE(strVal1.CompareNoCase(strVal2) == 0);

	// Format() works just like CString's

	strVal1.Format(_T("This %s a string named strVal%d"), _T("IS"), 1);
	OutputDebugString(strVal1 + _T("\n"));

	// Declare an STL map class which maps strings to integers.  The
	// keys are case insensitive, so an integer stored under the key
	// _T("MYKEY") could be retrieved with the value _T("mykey")

	typedef std::map<CStdString, int, StdStringLessNoCase> CMyMap;
	CMyMap myMap;
	myMap[_T("MYKEY")] = 7;
	_ASSERTE(myMap.find(_T("mykey")) != myMap.end());

	// If we were calling some windows function that fills out a
	// buffer for us we can use the GetBuffer() function.  .

	CStdString strPath;
	::GetTempPath( MAX_PATH, strPath.GetBuffer(MAX_PATH+1));

	// You can set the resource handle for loading string resources
	// and then load them via either the constructor or the Load()
	// function.

	_ASSERTE(_T("All your base are belong to us!") == strString);

	_ASSERTE(_T("I see dead people") == strString);
	return 0;

	// If this were MFC code, we could serialize the strings to CArchives:

	void  CMyObject::Serialize(CArchive& ar)
		CStdString strVal3(_T("This is a string"));
		if ( ar.IsStoring() )
			ar << strVal;
			ar >> strVal;

	// If we were implementing the IPersistStream interface on a COM
	// object which had a member CStdString variable named 'm_strVal',
	// we could take advantage of the CStdString stream functions to
	// greatly simplify the implementation as follows:

	HRESULT CMyComObject::GetSizeMax(ULARGE_INTEGER* pcbSizeMax)
		pcbSizeMax->QuadPart = m_strVal.StreamSize();
		return S_OK;
	HRESULT CMyComObject::Save(IStream* pStream, BOOL bClearDirty)
		return m_strVal.StreamSave(pStream);
	HRESULT CMyComObject::Load(IStream* pStream)
		return m_strVal.StreamLoad(pStream);


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About the Author

Joe O'Leary
Web Developer
United States United States
I've been a software developer since 1990.

While my main page is out of date (and I have therefore blanked it), you can read about the CStdString pages here

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