C++ 16进制日志输出 每行右侧ASII输出

void logbuffer(unsigned char *buff, int len, int iclm = 16);

void logbuffer(unsigned char *buff,int len,int iclm )
{
    static const int clm = iclm; //每行被打印成16进制的字符数   只修改这一行就可以改变每行打印的字符数量

    static const int linelen = clm * 3 + clm + 1;//每行的字符总数
    char *Xbuffer = new char[(len/clm+1)*linelen];
    memset(Xbuffer,0, (len / clm + 1)*linelen);
    sprintf(Xbuffer, "\r\n");
    
    int linenum = 0;
    for (size_t i = 0; i < len; i++)
    {
        if (0 == (i+1)%clm ) 
        {
            sprintf(Xbuffer + 3 * i+ 1 + linenum * (clm+1)  , "%02X ", *(buff + i));
            for (size_t j = 0; j < clm; j++)
            {
                if ( isgraph(*(buff + i - clm+1 + j)) /*|| ispunct(*(buff + i - 15 + i))*/ )
                {
                    *(Xbuffer + 3 * i + 1 + linenum * (clm + 1) + j+3) = *(buff + i - clm+1 + j);
                }
                else 
                {
                    *(Xbuffer + 3 * i + 1 + linenum * (clm + 1) + j+3) = ‘.‘;
                }
            }
            linenum++;
            *(Xbuffer + 3 * i + 1 + (clm + 1)*linenum+3-1) = ‘\n‘;
            
        }
        else {
            sprintf(Xbuffer + 3 * i+1+linenum* (clm + 1), "%02X ", *(buff + i));
        }
    }
    //最后一行处理
    if (0 != len % clm ) {
        for (size_t i = len % clm; i < clm; i++)
        {
            sprintf(Xbuffer + 1 + linenum * linelen+3*(i), "   ");
        }
        for (size_t i = 0; i < len % clm; i++)
        {
            if ( isgraph(*(buff + clm * linenum + i))/*|| ispunct(*(buff + 16 * linenum + i))*/ )
            {
                *(Xbuffer + 1 + linenum * linelen + clm * 3 + i) = *(buff + clm * linenum + i);
            }
            else
            {
                *(Xbuffer + 1 + linenum * linelen + clm * 3 + i) = ‘.‘;
                
            }
        }
    }
    //LOG(DEBUG) <<Xbuffer;
    delete[]Xbuffer;
}

//原创。转载请标明引用：https://www.cnblogs.com/liuguoyao514257665/p/9863837.html