SimpleEventBuilder/fragment_dataformat.h

#include <cstddef>
#include <cstdint>
#include <cstring>

#define START_OF_HEADER_MARKER 0xee1234ee

typedef struct Header {
    uint32_t startOfHeaderMarker = START_OF_HEADER_MARKER;
    uint32_t headerSize;
    uint32_t fragmentSize;
    uint32_t sourceIdentifier;
    uint32_t runNumber;
    uint32_t detectorEventNumber;
    uint32_t numberOfStatusElements;
    uint32_t *statusElementsArray;
    /*friend std::ostream& operator <<(std::ostream& os, Header const& header)
    {
        return os << std::setw(8) << std::setfill('0') << header.startOfHeaderMarker << '\n'
                  << std::setw(8) << std::setfill('0') << header.headerSize << '\n'
                  << std::setw(8) << std::setfill('0') << header.fragmentSize << '\n'
                  << std::setw(8) << std::setfill('0') << header.runNumber << '\n'
                  << std::setw(8) << std::setfill('0') << header.detectorEventNumber << '\n'
                  << std::setw(8) << std::setfill('0') << header.numberOfStatusElements << '\n';
    }*/
} Header;

typedef struct Fragment {
    Header header;
    uint32_t *payloadElements;
} Fragment;

enum ERROR_CODES {
    INCORRECT_ERROR = (1 << 0),
    CORRUPTED_ERROR = (1 << 1),
    MISSING_DATA_ERROR = (1 << 2),
    TIMEOUT_ERROR = (1 << 3)
};

void encode_header(uint32_t *buffer, const Header &header) {
    buffer[0] = header.startOfHeaderMarker;
    buffer[1] = header.headerSize;
    buffer[2] = header.fragmentSize;
    buffer[3] = header.sourceIdentifier;
    buffer[4] = header.runNumber;
    buffer[5] = header.detectorEventNumber;
    buffer[6] = header.numberOfStatusElements;

    std::memcpy(&buffer[7], header.statusElementsArray, header.numberOfStatusElements * sizeof(uint32_t));
}

void encode_fragment(uint32_t *buffer, const Fragment &fragment){
    encode_header(buffer, fragment.header);
    std::memcpy(&buffer[fragment.header.headerSize], fragment.payloadElements, (fragment.header.fragmentSize - fragment.header.headerSize) * sizeof(uint32_t));
}