UTF82Unicode

包子给的一段代码，哈哈。。

UTF82Unicode(const unsigned char* ib, int & iLen, unsigned char* ob,int &n)
{
    n=0;
    for(int i=0; i<iLen; i++)
    {
        if(ib[i]>>7==0)
        {
            ob[n++]=ib[i];
            ob[n++]=0;
        }
        else if(ib[i]>=240)
        {
            unsigned short x=ib[i]&0xF;
            x<<=6;
            x|=ib[i+1]&0x3F;
            x<<=6;
            x|=ib[i+2]&0x3f;
            x<<=6;
            x|=ib[i+3]&0x3f;
            ob[n++]=x&0xFF;
            ob[n++]=(x>>8)&0xFF;
            i+=3;
        }
        else if(ib[i]>=224)
        {
            unsigned short x=ib[i]&0xF;
            x<<=6;
            x|=ib[i+1]&0x3F;
            x<<=6;
            x|=ib[i+2]&0x3F;
            ob[n++]=x&0xFF;
            ob[n++]=(x>>8)&0xFF;
            i+=2;
        }
        else if(ib[i]>=192)
        {
            unsigned short x=ib[i]&0x3F;
            x<<=6;
            x|=ib[i+1]&0x3F;
            ob[n++]=x&0xFF;
            ob[n++]=(x>>8)&0xFF;
            i++;
        }
    }
    n = n/2;
}