Windows下简单的编码转换

Windows下简单的编码转换

/**********************************************************************************
* Function    : WCharToChar
* Description : wide char to muliple char
***********************************************************************************/
int WCharToChar(UINT PageCode, std::wstring strWChar, std::string &strChar)
{
        int nSize = WideCharToMultiByte(PageCode, 0, strWChar.c_str(), -1, NULL, 0, NULL, NULL);
        if( nSize <= 0 )
                return -1;

        strChar.clear();
        int ret = 0;
        char *pszDest = new char[nSize+1];
        if( pszDest )
        {
                memset( pszDest, 0, nSize+1 );
                ret = WideCharToMultiByte(PageCode, 0, strWChar.c_str(), -1, pszDest, nSize, NULL, FALSE);
                pszDest[nSize] = '\0';
                strChar = pszDest;
        }
        SAFE_DELETE_ARRAY( pszDest );
        return ret;
}

int WCharToChar(std::wstring strWChar, std::string &strChar)
{
        return WCharToChar( GetOEMCP(), strWChar, strChar );
}

/**********************************************************************************
* Function    : CharToWChar
* Description : muliple char to wide char
***********************************************************************************/
int CharToWChar(UINT PageCode, std::string strChar, std::wstring &strWChar)
{
        int nSize = MultiByteToWideChar(CP_ACP, 0, strChar.c_str(), -1, 0, 0);
        if( nSize <= 0 )
                return -1;

        strWChar.clear();
        int ret = 0;
        wchar_t *pszDest = new wchar_t[nSize+1];
        if( pszDest )
        {
                memset( pszDest, 0, nSize );
                ret = MultiByteToWideChar(PageCode, 0, strChar.c_str(), -1, pszDest, nSize);
                pszDest[nSize] = L'\0';
                strWChar = pszDest;
        }
        SAFE_DELETE_ARRAY( pszDest );
        return ret;
}

int CharToWChar(std::string strChar, std::wstring &strWChar)
{
        return CharToWChar( GetOEMCP(), strChar, strWChar );
}

/**********************************************************************************
* Function : GB2312ToUtf8
* Description : GB2312 to UTF-8
***********************************************************************************/
int GB2312ToUtf8A( const char *pszGB2312, std::string &strUtf8 )
{
        int ret = 0;
        std::wstring wGB2312;
        CharToWChar( CP_ACP, pszGB2312, wGB2312 );
        ret = WCharToChar( CP_UTF8, wGB2312, strUtf8 );
        return ret;
}

int GB2312ToUtf8W( const wchar_t *pszGB2312, std::string &strUtf8 )
{
        int ret = 0;
        ret = WCharToChar( CP_UTF8, pszGB2312, strUtf8 );
        return ret;
}

/**********************************************************************************
* Function : Utf8ToGB2312
* Description : UTF-8 to GB2312
***********************************************************************************/
int Utf8ToGB2312A( const char *pszUtf8, std::string &strGB2312 )
{
        int ret = 0;
        std::wstring wUnicode;
        CharToWChar( CP_UTF8, pszUtf8, wUnicode );
        ret = WCharToChar( CP_ACP, wUnicode, strGB2312 );
        return ret;
}

int Utf8ToGB2312W( const char *pszUtf8, std::wstring &strGB2312 )
{
        int ret = 0;
        ret = CharToWChar( CP_UTF8, pszUtf8, strGB2312 );
        return ret;
}