vs2010字符串的转换

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void ConvertGBKToUtf8(std::string& strGBK)
{
int len=MultiByteToWideChar(CP_ACP, 0, (char*)strGBK.c_str(), -1, NULL,0);
wchar_t * wszUtf8 = new wchar_t[len+1];
memset(wszUtf8, 0, len * 2 + 2);
MultiByteToWideChar(CP_ACP, 0, (char*)strGBK.c_str(), -1, wszUtf8, len);

len = WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, NULL, 0, NULL, NULL);
char *szUtf8=new char[len + 1];
memset(szUtf8, 0, len + 1);
WideCharToMultiByte (CP_UTF8, 0, wszUtf8, -1, szUtf8, len, NULL,NULL);

strGBK = szUtf8;
delete[] szUtf8;
delete[] wszUtf8;
}

void ConvertUtf8ToGBK(std::string& strUtf8)
{
int len=MultiByteToWideChar(CP_UTF8, 0, (char*)strUtf8.c_str(), -1, NULL,0);
wchar_t * wszGBK = new wchar_t[len+1];
memset(wszGBK, 0, len * 2 + 2);
MultiByteToWideChar(CP_UTF8, 0, (char*)strUtf8.c_str(), -1, wszGBK, len);

len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);
char *szGBK=new char[len + 1];
memset(szGBK, 0, len + 1);
WideCharToMultiByte (CP_ACP, 0, wszGBK, -1, szGBK, len, NULL,NULL);

strUtf8 = szGBK;
delete[] szGBK;
delete[] wszGBK;
}
wstring ANSIToUnicode( const string& str )
{

int len = 0;
len = str.length();
int unicodeLen = ::MultiByteToWideChar( CP_ACP,0,str.c_str(),-1,NULL,0 );

wchar_t * pUnicode;
pUnicode = new wchar_t[unicodeLen+1];
memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));
::MultiByteToWideChar( CP_ACP,0,str.c_str(),-1,(LPWSTR)pUnicode,unicodeLen );

wstring rt;
rt = ( wchar_t* )pUnicode;
delete pUnicode;
return rt;

}

string UnicodeToANSI( const wstring& str )
{
char* pElementText;
int iTextLen;

iTextLen = WideCharToMultiByte( CP_ACP,0,str.c_str(),-1,NULL,0,NULL,NULL );

pElementText = new char[iTextLen + 1];
memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );
::WideCharToMultiByte( CP_ACP,0,str.c_str(),-1,pElementText,iTextLen,NULL,NULL );

string strText;
strText = pElementText;
delete[] pElementText;

return strText;

}

wstring UTF8ToUnicode( const string& str )
{
int len = 0;
len = str.length();
int unicodeLen = ::MultiByteToWideChar( CP_UTF8,0,str.c_str(),-1,NULL,0 );

wchar_t * pUnicode;
pUnicode = new wchar_t[unicodeLen+1];

memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));
::MultiByteToWideChar( CP_UTF8,0,str.c_str(),-1,(LPWSTR)pUnicode,unicodeLen );

wstring rt;
rt = ( wchar_t* )pUnicode;
delete pUnicode;

return rt;

}

string UnicodeToUTF8( const wstring& str )
{
char* pElementText;
int iTextLen;

iTextLen = WideCharToMultiByte( CP_UTF8,0,str.c_str(),-1,NULL,0,NULL,NULL );

pElementText = new char[iTextLen + 1];
memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );
::WideCharToMultiByte( CP_UTF8,0,str.c_str(),-1,pElementText,iTextLen,NULL,NULL );

string strText;
strText = pElementText;
delete[] pElementText;

return strText;

}

void wcharTochar(const wchar_t *wchar, char *chr, int length)
{
    WideCharToMultiByte( CP_ACP, 0, wchar, -1,
        chr, length, NULL, NULL );
}
char *GetBuf(CString str)
{
   CString origCString=_T("");
   origCString = str;
    wchar_t* wCharString = origCString.GetBuffer(origCString.GetLength()+1);
    size_t origsize = wcslen(wCharString) + 1;
    size_t convertedChars = 0;
    char *CharString;
    CharString=(char*)malloc(origsize);
    wcharTochar(wCharString,CharString,origsize);
   return CharString;
}

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