#include "kutilities.h"
#include <iomanip>
#include <string>
#include <sstream>
#include <chrono>

Kutilities::Kutilities() {}


// 函数用于将内存块转换为十六进制字符串
std::string Kutilities::printHex(const void* data, size_t size)
{
    std::ostringstream oss;
    std::ostringstream oss2;
    std::ostringstream ossrow;

    // 每行输出的字节数
    const size_t lineSize = 16;
    const unsigned char* p = static_cast<const unsigned char*>(data);

    int ic = 0;
    int row = 0;

    ossrow << std::setw(8) << std::setfill('0') << std::hex << row++ << "h : ";
    oss << ossrow.str().c_str();

    for( size_t i = 0; i < size; ++i )
    {
        ic++;
        // 每个字节之间用空格分隔
        oss << std::setw(2) << std::setfill('0') << std::hex << std::uppercase << static_cast<int>(p[i]);

        char ch = (isprint(p[i]) != 0) ? p[i] : '.';

        oss2 << ch;

        //每lineSize个字节换行
        if( (i + 1) % lineSize == 0 )
        {
            ossrow.clear();
            ossrow.str("");

            oss << "    [" << oss2.str().c_str() << "]" << std::endl;
            oss2.clear();
            oss2.str("");

            ossrow << std::setw(8) << std::setfill('0') << std::hex << row++ << "h : ";
            oss << ossrow.str().c_str();

            ic = 0;
        }
        else if( i == size - 1 )
        {
            if( (i + 1) % lineSize != 0 )
            {
                if( i % 2 != 0 )
                {
                    for( size_t j = 0; j < (lineSize - ic); j++ )
                    {
                        oss << " --";
                    }
                }
                else
                {
                    for( size_t j = 0; j < (lineSize - ic); j++ )
                    {
                        oss << " --";
                    }
                }
            }
            oss << "    [" << oss2.str().c_str();

            if( (i + 1) % lineSize != 0 )
            {
                for( size_t j = 0; j < (lineSize - ic); j++ )
                {
                    oss << " ";
                }
            }

            oss << "]" << std::endl;
            oss2.clear();
            oss2.str("");

            ic = 0;
        }
#if 0
        else if( (i + 1) % 8 == 0 )
        {
            oss << "    ";
            oss2 << "  ";
        }
#endif
        else
        {
            oss << " ";
        }
    }
    return oss.str();
}


std::string Kutilities::get_current_timestamp()
{
    auto now = std::chrono::system_clock::now();
    //通过不同精度获取相差的毫秒数
    uint64_t dis_millseconds = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count()
                               - std::chrono::duration_cast<std::chrono::seconds>(now.time_since_epoch()).count() * 1000;
    time_t tt = std::chrono::system_clock::to_time_t(now);
    auto time_tm = localtime(&tt);
    char strTime[25] = { 0 };
    sprintf(strTime, "%d-%02d-%02d %02d:%02d:%02d.%03d", time_tm->tm_year + 1900,
            time_tm->tm_mon + 1, time_tm->tm_mday, time_tm->tm_hour,
            time_tm->tm_min, time_tm->tm_sec, (int)dis_millseconds);
    return std::string(strTime);
}