triangular_layout.cpp

// Copyright 2008 Gunter Winkler <guwi17@gmx.de>
// Thanks to Tiago Requeijo for providing this test
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#include <iostream>
#include <boost/numeric/ublas/symmetric.hpp>
#include <boost/numeric/ublas/triangular.hpp>
#include <boost/cstdlib.hpp>

using namespace std;
namespace ublas = boost::numeric::ublas;

int main()
{
	int sz = 4;
	ublas::symmetric_matrix<int, ublas::upper, ublas::column_major>  UpCol (sz, sz);
	ublas::symmetric_matrix<int, ublas::upper, ublas::row_major>     UpRow (sz, sz);
	ublas::symmetric_matrix<int, ublas::lower, ublas::column_major>  LoCol (sz, sz);
	ublas::symmetric_matrix<int, ublas::lower, ublas::row_major>     LoRow (sz, sz);

	ublas::triangular_matrix<int, ublas::upper, ublas::column_major>  TrUpCol (sz, sz);
	ublas::triangular_matrix<int, ublas::upper, ublas::row_major>     TrUpRow (sz, sz);
	ublas::triangular_matrix<int, ublas::lower, ublas::column_major>  TrLoCol (sz, sz);
	ublas::triangular_matrix<int, ublas::lower, ublas::row_major>     TrLoRow (sz, sz);

	for(int i=0; i<sz; ++i)
		for(int j=i; j<sz; ++j)
		{
			// Symmetric
			UpCol(i,j) = 10*i + j;
			UpRow(i,j) = 10*i + j;
			LoCol(i,j) = 10*i + j;
			LoRow(i,j) = 10*i + j;
			// Triangular
			TrUpCol(i,j) = 10*i + j;
			TrUpRow(i,j) = 10*i + j;
			TrLoCol(j,i) = 10*i + j;
			TrLoRow(j,i) = 10*i + j;
		}

	//get pointers to data
	int* uc = &(UpCol.data()[0]);
	int* ur = &(UpRow.data()[0]);
	int* lc = &(LoCol.data()[0]);
	int* lr = &(LoRow.data()[0]);
	int* tuc = &(TrUpCol.data()[0]);
	int* tur = &(TrUpRow.data()[0]);
	int* tlc = &(TrLoCol.data()[0]);
	int* tlr = &(TrLoRow.data()[0]);

	// upper, column_major
	//   storage should be:  0 1 11 2 12 22 3 13 23 33
	int uc_correct[] = {0, 1, 11, 2, 12, 22, 3, 13, 23, 33};

	// upper, row_major
	//   storage should be:  0 1 2 3 11 12 13 22 23 33
	int ur_correct[] = {0, 1, 2, 3, 11, 12, 13, 22, 23, 33};

	// lower, column_major
	//   storage should be:  0 1 2 3 11 12 13 22 23 33
	int lc_correct[] = {0, 1, 2, 3, 11, 12, 13, 22, 23, 33};

	// lower, row_major
	//   storage should be:  0 1 11 2 12 22 3 13 23 33
	int lr_correct[] = {0, 1, 11, 2, 12, 22, 3, 13, 23, 33};

	bool success = true;

	// Test Symmetric
	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(uc[i] != uc_correct[i])
		{
			cout << "Storage error (Symmetric, Upper, Column major)" << endl;
			success = false;
			break;
		}

	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(ur[i] != ur_correct[i])
		{
			cout << "Storage error (Symmetric, Upper, Row major)" << endl;
			success = false;
			break;
		}

	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(lc[i] != lc_correct[i])
		{
			cout << "Storage error (Symmetric, Lower, Column major)" << endl;
			success = false;
			break;
		}

	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(lr[i] != lr_correct[i])
		{
			cout << "Storage error (Symmetric, Lower, Row major)" << endl;
			success = false;
			break;
		}

	// Test Triangular
	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(tuc[i] != uc_correct[i])
		{
			cout << "Storage error (Triangular, Upper, Column major)" << endl;
			success = false;
			break;
		}

	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(tur[i] != ur_correct[i])
		{
			cout << "Storage error (Triangular, Upper, Row major)" << endl;
			success = false;
			break;
		}

	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(tlc[i] != lc_correct[i])
		{
			cout << "Storage error (Triangular, Lower, Column major)" << endl;
			success = false;
			break;
		}

	for(int i=0; i<sz*(sz+1)/2; ++i)
		if(tlr[i] != lr_correct[i])
		{
			cout << "Storage error (Triangular, Lower, Row major)" << endl;
			success = false;
			break;
		}


	return (success)?boost::exit_success:boost::exit_failure;
}