cocos2d-x 文件MD5校验(12)

p>        memcpy( &m_lpszBuffer[nIndex], Input, nPartLen );  

p>        Transform( m_lpszBuffer );  

p>        for (i = nPartLen; i + 63 < nInputLen; i += 64)  

p>        {  

p>            Transform( &Input[i] );  

p>        }  

p>        nIndex = 0;  

p>    }  

p>    else  

p>    {  

p>        i = 0;  

p>    }  

p>      

p>    // Buffer remaining input  

p>    memcpy( &m_lpszBuffer[nIndex], &Input[i], nInputLen-i);  

p>}  

p>  

p>  

p>  

p>std::string CMD5Checksum::GetMD5OfString(std::string strString)  

p>{  

p>    CMD5Checksum MD5Checksum;   //checksum object  

p>    int nLength = strString.length();       //number of bytes read from the file  

p>    //const int nBufferSize = 1024; //checksum the file in blocks of 1024 bytes  

p>    BYTE *Buffer;   //buffer for data read from the file  

p>    Buffer=(BYTE*)(strString.c_str());  

p>    //checksum the file in blocks of 1024 bytes  

p>    //while ((nLength = File.Read( Buffer, nBufferSize )) > 0 )  

p>    //{  

p>    MD5Checksum.Update( Buffer, nLength );  

p>    //}  

p>    //finalise the checksum and return it  

p>    return MD5Checksum.Final();  

p>}  

p> 

p>使用方法

p>[cpp]  

p>std::string pszPath = CCFileUtils::sharedFileUtils()->getWritablePath()+"data.zip";  

p>    std::string strFileMD5 = CMD5Checksum::GetMD5(pszPath);  

p>