C++查詢wry.dat中的IP地址信息代码

2008-03-24 15:56:54　来源:中国自学编程网　作者:佚名点击:

直接上代碼（哪一位有不明白的地方，請留言）：

        if( (ip1Num<=searchIpNum) && (searchIpNum<=ip2Num) )...{
            fs.seekg(exeOffset+pos, ios_base::beg);
            ip1Num=read4Bit(fs);
#if defined _DEBUG_
            cout<<" Last position:"<<endl<<endl;
            printIpNum(ip1Num);
            cout<<"pos="<<pos<<"   ";
#endif
            pos=read3Bit(fs);
#if defined _DEBUG_
            cout<<"pos="<<pos<<endl;
#endif
            fs.seekg(exeOffset+pos, ios_base::beg);
         ip2Num=read4Bit(fs);
#if defined _DEBUG_
            printIpNum(ip2Num);
#endif
            break;
        }else if(ip1Num>searchIpNum)...{
            endNum = midNum;
        }else if(ip2Num<searchIpNum)...{
            beginNum = midNum;
        }
    }

#if defined _DEBUG_
cout<<endl<<"Found position:"<<fs.tellg()<<endl;
#endif

    ipAddr=new char[512];
    memset(ipAddr, 0, 512);
    iRead = readString(fs, exeOffset, ipAddr);
    if(iRead>0)...{
        cout<<ipAddr<<" ";
    }

    memset(ipAddr, 0, 512);
    iRead = readString(fs, exeOffset, ipAddr);
    if(iRead>0)...{
        cout<<ipAddr;
    }

delete[]ipAddr;

fs.close();
return 0;

}

long read4Bit(ifstream& f)...{
long t; char c[4];

t=0;
f.read((char*)&t, 4);

return t;
}

long read3Bit(ifstream& f)...{
    long t;
    f.read((char*)&t, 3);
    return t;
}

int readString(ifstream& f, long exeOffset, char * str)...{
    char ipFlag; long ipSeek, tmpSeek;
    int ret;
    ipFlag=f.get();
    if(ipFlag==0x1) ...{ // 重定向模式1: 城市信息隨國家信息定向
        ipSeek=read3Bit(f);
        f.seekg(exeOffset+ipSeek, ios_base::beg);