字符集转换: Unicode - Ansi

字符集转换: Unicode - Ansi

 string UnicodeToAnsi ( const wstring& wstrSrc )
 {
     /*!< 分配目标空间, 一个16位Unicode字符最多可以转为4个字节*/
     //int iAllocSize = static_cast<int>( wstrSrc.size() * 4 + 10 );
     int iAllocSize = WideCharToMultiByte(CP_THREAD_ACP,,wstrSrc.c_str(),-,NULL,,NULL,NULL);
     char* pwszBuffer = new char[ (UINT)iAllocSize ];
     memset(pwszBuffer,,iAllocSize);
     if ( NULL == pwszBuffer )
     {
         return "";
     }
     int iCharsRet = WideCharToMultiByte( CP_THREAD_ACP, , wstrSrc.c_str(), -,pwszBuffer, iAllocSize, NULL, NULL );
     /*!< 成功 */
     string strRet;
     if (  < iCharsRet )
     {
         (void)strRet.assign ( pwszBuffer, static_cast<size_t>( iCharsRet ) );
     }

     /*!< 释放内存 */
     delete[] pwszBuffer;

     return strRet;
 }