Unicode与UTF8编码转换

原创于 2011-02-21 14:48:00 发布 · 218 阅读

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本文提供了两个实用的CString转换函数：一个用于将CString对象转换为UTF-8编码的字符串，另一个用于将UTF-8编码的字符串转换为Unicode编码。通过使用Windows API函数MultiByteToWideChar和WideCharToMultiByte实现不同字符集间的转换。

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CString ConverToUTF8(CString szText)
{
	WCHAR *chBuf;
	char * p;
	int iLen;

    iLen = MultiByteToWideChar(CP_ACP, 0, szText,-1 , NULL, 0);
    chBuf = new WCHAR[iLen+1];
    ZeroMemory(chBuf, iLen * sizeof(WCHAR));
    iLen =MultiByteToWideChar(CP_ACP, 0, szText, -1, chBuf, iLen+1);

	iLen = WideCharToMultiByte(CP_UTF8, 0, chBuf,-1 , NULL, 0,NULL,NULL);
	p = new CHAR[iLen+1];
    ZeroMemory(p, iLen * sizeof(CHAR));
    iLen =WideCharToMultiByte(CP_UTF8, 0, chBuf, -1,  p, iLen+1,NULL,NULL);

	delete []chBuf;
	CString re(p);

	return re;
}

CString UTF8ToUnicode(CString szText)
{
	int  len = 0;
	len = szText.GetLength();
	int  unicodeLen = ::MultiByteToWideChar( CP_UTF8,0,szText.GetBuffer(len),-1,NULL,0 ); 
	
	wchar_t *  pUnicode; 
	pUnicode = new  wchar_t[unicodeLen+1]; 
	
	memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t)); 
	::MultiByteToWideChar( CP_UTF8,0,szText.GetBuffer(len),-1,(LPWSTR)pUnicode,unicodeLen ); 
	
	CString  rt = pUnicode; 
	delete  pUnicode;
	
	return  rt; 	
}