QGIS/external/lazperf/header.hpp

/*
===============================================================================

  PROGRAMMERS:

    martin.isenburg@rapidlasso.com  -  http://rapidlasso.com
    uday.karan@gmail.com - Hobu, Inc.

  COPYRIGHT:

    (c) 2007-2014, martin isenburg, rapidlasso - tools to catch reality
    (c) 2014, Uday Verma, Hobu, Inc.

    This is free software; you can redistribute and/or modify it under the
    terms of the GNU Lesser General Licence as published by the Free Software
    Foundation. See the COPYING file for more information.

    This software is distributed WITHOUT ANY WARRANTY and without even the
    implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  CHANGE HISTORY:

===============================================================================
*/

#pragma once

#include <cstdint>
#include <fstream>
#include <limits>
#include <memory>
#include <vector>

#include "lazperf_base.hpp"

namespace lazperf
{

class LeInserter;
class LeExtractor;

const uint32_t DefaultChunkSize = 50000;
const uint32_t VariableChunkSize = (std::numeric_limits<uint32_t>::max)();

LAZPERF_EXPORT int baseCount(int format);

struct LAZPERF_EXPORT vector3
{
    vector3() : x(0), y(0), z(0)
    {}

    vector3(double x, double y, double z) : x(x), y(y), z(z)
    {}

    double x;
    double y;
    double z;
};

// We currently export the whole struct because we have virtual functions and the vtable
// doesn't get exported unless you export the struct/class. :(
struct LAZPERF_EXPORT base_header
{
    char magic[4] { 'L', 'A', 'S', 'F' };
    uint16_t file_source_id {};
    uint16_t global_encoding {};
    char guid[16] {};

    struct {
        uint8_t major {1};
        uint8_t minor {3};
    } version;

    char system_identifier[32] {};
    char generating_software[32] {};

    struct {
        uint16_t day {};
        uint16_t year {};
    } creation;

    uint16_t header_size {};
    uint32_t point_offset {};
    uint32_t vlr_count {};

    uint8_t point_format_id {};
    uint16_t point_record_length {};

    uint32_t point_count {};
    uint32_t points_by_return[5] {};

    vector3 scale;
    vector3 offset;
    double maxx { std::numeric_limits<double>::lowest() };
    double minx { (std::numeric_limits<double>::max)() };
    double maxy { std::numeric_limits<double>::lowest() };
    double miny { (std::numeric_limits<double>::max)() };
    double maxz { std::numeric_limits<double>::lowest() };
    double minz { (std::numeric_limits<double>::max)() };

    size_t sizeFromVersion() const;
    int ebCount() const;
    int pointFormat() const;
    bool compressed() const;
    static int minorVersion(std::istream& in);

protected:
    base_header();
};

struct LAZPERF_EXPORT header12 : public base_header
{
    header12()
    {
        version.minor = 2;
    }

    static header12 create(std::istream& in);
    void read(std::istream& in);
    void write(std::ostream& out) const;
    static const size_t Size;
};

struct LAZPERF_EXPORT header13 : public header12
{
    header13()
    {
        version.minor = 3;
    }

    static header13 create(std::istream& in);
    void read(std::istream& in);
    void write(std::ostream& out) const;
    static const size_t Size;
    uint64_t wave_offset {0};
};

struct LAZPERF_EXPORT header14 : public header13
{
    header14()
    {
        version.minor = 4;
    }

    static header14 create(std::istream& in);
    void read(std::istream& in);
    void write(std::ostream& out) const;
    static const size_t Size;

    uint64_t evlr_offset {0};
    uint32_t evlr_count {0};
    uint64_t point_count_14 {0};
    uint64_t points_by_return_14[15] {};
};

// Note that the values must be converted to 32-bit before encoding.
struct chunk
{
    uint64_t count;
    uint64_t offset;
};

#define FRIEND_TEST(test_case_name, test_name) \
    friend class test_case_name##_##test_name##_Test

} // namespace lazperf