VectorStruct.h

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// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.
 
#pragma once
 
#include <fmt/format.h>
#include <wpi/ct_string.h>
#include <wpi/struct/Struct.h>
 
#include "frc/EigenCore.h"
 
template <int Size, int Options, int MaxRows, int MaxCols>
struct wpi::Struct<frc::Matrixd<Size, 1, Options, MaxRows, MaxCols>> {
  static constexpr ct_string kTypeName =
      wpi::Concat("Vector__"_ct_string, wpi::NumToCtString<Size>());
  static constexpr std::string_view GetTypeName() { return kTypeName; }
  static constexpr size_t GetSize() { return Size * 8; }
  static constexpr ct_string kSchema = wpi::Concat(
      "double data["_ct_string, wpi::NumToCtString<Size>(), "]"_ct_string);
  static constexpr std::string_view GetSchema() { return kSchema; }
 
  static frc::Matrixd<Size, 1, Options, MaxRows, MaxCols> Unpack(
      std::span<const uint8_t> data) {
    constexpr size_t kDataOff = 0;
    wpi::array<double, Size> vec_data =
        wpi::UnpackStructArray<double, kDataOff, Size>(data);
    frc::Matrixd<Size, 1, Options, MaxRows, MaxCols> vec;
    for (int i = 0; i < Size; i++) {
      vec(i) = vec_data[i];
    }
    return vec;
  }
 
  static void Pack(
      std::span<uint8_t> data,
      const frc::Matrixd<Size, 1, Options, MaxRows, MaxCols>& value) {
    constexpr size_t kDataOff = 0;
    wpi::array<double, Size> vec_data(wpi::empty_array);
    for (int i = 0; i < Size; i++) {
      vec_data[i] = value(i);
    }
    wpi::PackStructArray<kDataOff, Size>(data, vec_data);
  }
};
 
static_assert(wpi::StructSerializable<frc::Vectord<1>>);
static_assert(wpi::StructSerializable<frc::Vectord<3>>);