cppcore/include/cppcore/misc/hexdump.inl

#pragma once

#include <iomanip>

#include "hexdump.h"

namespace cppcore
{

    /* hexdump */

    hexdump::hexdump(
        const void *    p_data,
        size_t          p_len,
        size_t          p_offset,
        size_t          p_split,
        size_t          p_newline)
        : data      (p_data)
        , len       (p_len)
        , offset    (p_offset)
        , split     (p_split)
        , newline   (p_newline)
        { }

    void hexdump::print(std::ostream& os) const
    {
        using namespace ::std;

        const uint8_t * p = static_cast<const uint8_t*>(data);
        size_t i = 0;
        size_t l = 0;
        std::string s;

        while (i < len)
        {
            if (i % newline == 0)
            {
                os << hex << setw(8) << setfill('0') << (offset + i);
            }

            if (l % split == 0)
            {
                os.put(' ');
                s.push_back('|');
            }

            s.push_back(std::isprint(p[i])
                ? static_cast<char>(p[i])
                : '.');

            os << " " << hex << setw(2) << setfill('0') << static_cast<int>(p[i]);
            ++l;
            ++i;

            if (i % newline == 0)
            {
                os << "  " << s << "|" << endl;
                s.clear();
                l = 0;
            }
        }

        if (l > 0)
        {
            auto rest = (newline - l);
            auto fill = (rest / split);
            os  << std::string(3 * rest + fill, ' ')
                << "  " << s << std::string(rest + fill, ' ') << "|";
        }
    }

}

namespace std
{

    /**
     * @brief Write the helper class to stream using the << operator.
     */
    template<typename T_char, typename T_traits>
    inline basic_ostream<T_char, T_traits>& operator<< (
        basic_ostream<T_char, T_traits>& os,
        const cppcore::hexdump& d)
    {
        d.print(os);
        return os;
    }

}