Method fetchWithDescription

io/private/las/Vlr.cpp:451–485

}

std::vector<char> VlrCatalog::fetchWithDescription(const std::string& userId, uint16_t recordId,
    std::string& outDescrip) const
{
    // We don't lock m_entries because we assume that the load has already occurred at the
    // time you want to fetch.
    std::vector<char> vlrdata;
    const Entry& e = find(userId, recordId);

    // We don't support VLRs with size > 4GB
    if (e.length == 0 || e.length > (std::numeric_limits<uint32_t>::max)())
        return vlrdata;

    uint64_t offset = e.offset;
    uint32_t length = (uint32_t)e.length;

    // Load the data plus the description.
    const int DescripLen = 32;
    assert(offset > DescripLen);
    // Add space for the description that precedes the data
    std::vector<char> v = m_fetch(offset - DescripLen, length + DescripLen);

    // Only make the string with non-null characters.
    int len = DescripLen - 1;
    while (len >= 0)
    {
        if (v[len])
            break;
        len--;
    }
    outDescrip.assign(v.data(), v.data() + len + 1);

    // Assign the payload of the VLR to the output VLR.
    vlrdata.assign(v.data() + DescripLen, v.data() + v.size());
    return vlrdata;
}


} // namespace las