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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2015 Ke Yang <yangke@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/CXX11/Tensor>
using Eigen::Tensor;
template<int DataLayout>
static void test_simple_inflation()
{
Tensor<float, 4, DataLayout> tensor(2,3,5,7);
tensor.setRandom();
array<ptrdiff_t, 4> strides;
strides[0] = 1;
strides[1] = 1;
strides[2] = 1;
strides[3] = 1;
Tensor<float, 4, DataLayout> no_stride;
no_stride = tensor.inflate(strides);
VERIFY_IS_EQUAL(no_stride.dimension(0), 2);
VERIFY_IS_EQUAL(no_stride.dimension(1), 3);
VERIFY_IS_EQUAL(no_stride.dimension(2), 5);
VERIFY_IS_EQUAL(no_stride.dimension(3), 7);
for (int i = 0; i < 2; ++i) {
for (int j = 0; j < 3; ++j) {
for (int k = 0; k < 5; ++k) {
for (int l = 0; l < 7; ++l) {
VERIFY_IS_EQUAL(tensor(i,j,k,l), no_stride(i,j,k,l));
}
}
}
}
strides[0] = 2;
strides[1] = 4;
strides[2] = 2;
strides[3] = 3;
Tensor<float, 4, DataLayout> inflated;
inflated = tensor.inflate(strides);
VERIFY_IS_EQUAL(inflated.dimension(0), 3);
VERIFY_IS_EQUAL(inflated.dimension(1), 9);
VERIFY_IS_EQUAL(inflated.dimension(2), 9);
VERIFY_IS_EQUAL(inflated.dimension(3), 19);
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 9; ++j) {
for (int k = 0; k < 9; ++k) {
for (int l = 0; l < 19; ++l) {
if (i % 2 == 0 &&
j % 4 == 0 &&
k % 2 == 0 &&
l % 3 == 0) {
VERIFY_IS_EQUAL(inflated(i,j,k,l),
tensor(i/2, j/4, k/2, l/3));
} else {
VERIFY_IS_EQUAL(0, inflated(i,j,k,l));
}
}
}
}
}
}
EIGEN_DECLARE_TEST(cxx11_tensor_inflation)
{
CALL_SUBTEST(test_simple_inflation<ColMajor>());
CALL_SUBTEST(test_simple_inflation<RowMajor>());
}
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