// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
// Copyright (C) 2010 Hauke Heibel <hauke.heibel@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include "main.h"

#include <Eigen/StdVector>
#include <Eigen/Geometry>

EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Vector4f)

EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Matrix2f)
EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Matrix4f)
EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Matrix4d)

EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Affine3f)
EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Affine3d)

EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Quaternionf)
EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(Quaterniond)

template <typename MatrixType>
void check_stdvector_matrix(const MatrixType& m) {
  Index rows = m.rows();
  Index cols = m.cols();
  MatrixType x = MatrixType::Random(rows, cols), y = MatrixType::Random(rows, cols);
  std::vector<MatrixType> v(10, MatrixType::Zero(rows, cols)), w(20, y);
  v[5] = x;
  w[6] = v[5];
  VERIFY_IS_APPROX(w[6], v[5]);
  v = w;
  for (int i = 0; i < 20; i++) {
    VERIFY_IS_APPROX(w[i], v[i]);
  }

  v.resize(21);
  v[20] = x;
  VERIFY_IS_APPROX(v[20], x);
  v.resize(22, y);
  VERIFY_IS_APPROX(v[21], y);
  v.push_back(x);
  VERIFY_IS_APPROX(v[22], x);
  VERIFY((std::uintptr_t) & (v[22]) == (std::uintptr_t) & (v[21]) + sizeof(MatrixType));

  // do a lot of push_back such that the vector gets internally resized
  // (with memory reallocation)
  MatrixType* ref = &w[0];
  for (int i = 0; i < 30 || ((ref == &w[0]) && i < 300); ++i) v.push_back(w[i % w.size()]);
  for (unsigned int i = 23; i < v.size(); ++i) {
    VERIFY(v[i] == w[(i - 23) % w.size()]);
  }
}

template <typename TransformType>
void check_stdvector_transform(const TransformType&) {
  typedef typename TransformType::MatrixType MatrixType;
  TransformType x(MatrixType::Random()), y(MatrixType::Random());
  std::vector<TransformType> v(10), w(20, y);
  v[5] = x;
  w[6] = v[5];
  VERIFY_IS_APPROX(w[6], v[5]);
  v = w;
  for (int i = 0; i < 20; i++) {
    VERIFY_IS_APPROX(w[i], v[i]);
  }

  v.resize(21);
  v[20] = x;
  VERIFY_IS_APPROX(v[20], x);
  v.resize(22, y);
  VERIFY_IS_APPROX(v[21], y);
  v.push_back(x);
  VERIFY_IS_APPROX(v[22], x);
  VERIFY((std::uintptr_t) & (v[22]) == (std::uintptr_t) & (v[21]) + sizeof(TransformType));

  // do a lot of push_back such that the vector gets internally resized
  // (with memory reallocation)
  TransformType* ref = &w[0];
  for (int i = 0; i < 30 || ((ref == &w[0]) && i < 300); ++i) v.push_back(w[i % w.size()]);
  for (unsigned int i = 23; i < v.size(); ++i) {
    VERIFY(v[i].matrix() == w[(i - 23) % w.size()].matrix());
  }
}

template <typename QuaternionType>
void check_stdvector_quaternion(const QuaternionType&) {
  typedef typename QuaternionType::Coefficients Coefficients;
  QuaternionType x(Coefficients::Random()), y(Coefficients::Random()), qi = QuaternionType::Identity();
  std::vector<QuaternionType> v(10, qi), w(20, y);
  v[5] = x;
  w[6] = v[5];
  VERIFY_IS_APPROX(w[6], v[5]);
  v = w;
  for (int i = 0; i < 20; i++) {
    VERIFY_IS_APPROX(w[i], v[i]);
  }

  v.resize(21);
  v[20] = x;
  VERIFY_IS_APPROX(v[20], x);
  v.resize(22, y);
  VERIFY_IS_APPROX(v[21], y);
  v.push_back(x);
  VERIFY_IS_APPROX(v[22], x);
  VERIFY((std::uintptr_t) & (v[22]) == (std::uintptr_t) & (v[21]) + sizeof(QuaternionType));

  // do a lot of push_back such that the vector gets internally resized
  // (with memory reallocation)
  QuaternionType* ref = &w[0];
  for (int i = 0; i < 30 || ((ref == &w[0]) && i < 300); ++i) v.push_back(w[i % w.size()]);
  for (unsigned int i = 23; i < v.size(); ++i) {
    VERIFY(v[i].coeffs() == w[(i - 23) % w.size()].coeffs());
  }
}

EIGEN_DECLARE_TEST(stdvector_overload) {
  // some non vectorizable fixed sizes
  CALL_SUBTEST_1(check_stdvector_matrix(Vector2f()));
  CALL_SUBTEST_1(check_stdvector_matrix(Matrix3f()));
  CALL_SUBTEST_2(check_stdvector_matrix(Matrix3d()));

  // some vectorizable fixed sizes
  CALL_SUBTEST_1(check_stdvector_matrix(Matrix2f()));
  CALL_SUBTEST_1(check_stdvector_matrix(Vector4f()));
  CALL_SUBTEST_1(check_stdvector_matrix(Matrix4f()));
  CALL_SUBTEST_2(check_stdvector_matrix(Matrix4d()));

  // some dynamic sizes
  CALL_SUBTEST_3(check_stdvector_matrix(MatrixXd(1, 1)));
  CALL_SUBTEST_3(check_stdvector_matrix(VectorXd(20)));
  CALL_SUBTEST_3(check_stdvector_matrix(RowVectorXf(20)));
  CALL_SUBTEST_3(check_stdvector_matrix(MatrixXcf(10, 10)));

  // some Transform
  CALL_SUBTEST_4(check_stdvector_transform(Affine2f()));  // does not need the specialization (2+1)^2 = 9
  CALL_SUBTEST_4(check_stdvector_transform(Affine3f()));
  CALL_SUBTEST_4(check_stdvector_transform(Affine3d()));

  // some Quaternion
  CALL_SUBTEST_5(check_stdvector_quaternion(Quaternionf()));
  CALL_SUBTEST_5(check_stdvector_quaternion(Quaterniond()));
}