//
// Copyright 2013-2014 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//

#include <uhd/transport/nirio/nifpga_lvbitx.h>
#include <cstdlib>
#include <string>
#include <fstream>
#include <streambuf>
#include <boost/algorithm/string.hpp>
#include <boost/regex.hpp>

namespace uhd { namespace niusrprio {

std::string nifpga_lvbitx::_get_bitstream_checksum(const std::string& file_path)
{
    std::string checksum;
    std::ifstream lvbitx_stream(file_path.c_str());
    if (lvbitx_stream.is_open()) {
        std::string lvbitx_contents;
        lvbitx_stream.seekg(0, std::ios::end);
        lvbitx_contents.reserve(static_cast<size_t>(lvbitx_stream.tellg()));
        lvbitx_stream.seekg(0, std::ios::beg);
        lvbitx_contents.assign((std::istreambuf_iterator<char>(lvbitx_stream)), std::istreambuf_iterator<char>());
        try {
            boost::smatch md5_match;
            if (boost::regex_search(lvbitx_contents, md5_match, boost::regex("<BitstreamMD5>([a-zA-Z0-9]{32})<\\/BitstreamMD5>", boost::regex::icase))) {
                checksum = std::string(md5_match[1].first, md5_match[1].second);
            }
        } catch (boost::exception&) {
            checksum = "";
        }
    }
    boost::to_upper(checksum);
    return checksum;
}

}}