CStr.cpp

//
// Stand-alone mini-CString
//
// Copyright (c) 2004, Algin Technology LLC
// Written by Alan Klietz
// Distributed under GNU General Public License version 2.
//
// $Id: CStr.cpp,v 1.2 2007/11/06 00:30:04 cvsalan Exp $
//

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <crtdbg.h>

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <tchar.h>

#define NEED_CSTR_H
#include "windows-support.h"

EXPORT CString::CString(const CString& strSrc) {
	*this = strSrc.GetData(); // invokes CString::operator=(LPCTSTR sz)
}

EXPORT CString::CString(LPCSTR sz)
{
	int iLen = (sz == NULL ? 0 : (int)strlen(sz));
	if (iLen == 0) {
		m_szBuf = NULL;
		m_iLen = 0;
	} else {
		_alloc(iLen);
		memcpy(m_szBuf, sz, iLen);
	}
}

void CString::_alloc(int iLen)
{
	if (iLen <= 0) {
		m_szBuf = NULL;
		m_iLen = 0 ;
	} else {
		m_iLen = iLen;
		m_szBuf = new char[iLen+1]; // add space for terminating \0
		m_szBuf[iLen] = '\0';
	}
}

EXPORT CString::~CString()
{
	if (m_szBuf == NULL) return;
	delete [] m_szBuf; m_szBuf = NULL;
}

EXPORT CString& CString::operator=(const CString& stringSrc)
{
	if (m_szBuf != stringSrc.GetData()) {
		if (m_szBuf != NULL) {
			delete [] m_szBuf; m_szBuf = NULL;
		}
		int nSrcLen = stringSrc.GetLength();
		_alloc(nSrcLen);
		if (nSrcLen > 0) {
			memcpy(m_szBuf, stringSrc.GetData(), nSrcLen);
		}
	}
	return *this;
}

EXPORT CString& CString::operator=(LPCSTR sz)
{
	int nSrcLen = (sz == NULL ? 0 : strlen(sz));
	_alloc(nSrcLen);
	if (nSrcLen > 0) {
		memcpy(m_szBuf, sz, nSrcLen);
	}
	return *this;
}

EXPORT BOOL operator==(const CString& s1, const CString& s2)
	{ return s1.Equal(s2) == 0; }
EXPORT BOOL operator!=(const CString& s1, const CString& s2)
	{ return s1.Equal(s2) != 0; }
/*
vim:tabstop=4:shiftwidth=4:noexpandtab
*/