LasVlr.cpp

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#include "LasVlr.h"
 
#include "LasMetadata.h"
 
// Qt
#include <QtGlobal>
// qCC_db
#include <ecvPointCloud.h>
// System
#include <algorithm>
#include <cstring>
 
LasVlr::LasVlr(const laszip_header& header)
{
    const auto vlrShouldBeCopied = [](const laszip_vlr_struct& vlr)
    {
        return !LasDetails::IsLaszipVlr(vlr) && !LasDetails::IsExtraBytesVlr(vlr);
    };
 
    ptrdiff_t numVlrs = std::count_if(header.vlrs, header.vlrs + header.number_of_variable_length_records, vlrShouldBeCopied);
    if (numVlrs > 0)
    {
        vlrs.resize(numVlrs);
        laszip_U32 j = 0;
        for (laszip_U32 i = 0; i < header.number_of_variable_length_records; ++i)
        {
            if (vlrShouldBeCopied(header.vlrs[i]))
            {
                LasDetails::CloneVlrInto(header.vlrs[i], vlrs[j]);
                j++;
            }
        }
    }
}
 
LasVlr& LasVlr::operator=(LasVlr rhs)
{
    LasVlr::Swap(*this, rhs);
    return *this;
}
 
LasVlr::LasVlr(const LasVlr& rhs)
    : extraScalarFields(rhs.extraScalarFields)
{
    if (rhs.numVlrs() != 0)
    {
        vlrs.resize(rhs.numVlrs());
        for (laszip_U32 i = 0; i < rhs.numVlrs(); ++i)
        {
            LasDetails::CloneVlrInto(rhs.vlrs[i], vlrs[i]);
        }
    }
}
 
void LasVlr::Swap(LasVlr& lhs, LasVlr& rhs) noexcept
{
    std::swap(lhs.vlrs, rhs.vlrs);
    std::swap(lhs.extraScalarFields, rhs.extraScalarFields);
}