1 files changed, 74 insertions, 0 deletions
diff --git a/test/bandmatrix.cpp b/test/bandmatrix.cpp
new file mode 100644
index 000000000..5e4e8e07b
--- /dev/null
+++ b/test/bandmatrix.cpp
@@ -0,0 +1,74 @@
+// This file is triangularView of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@inria.fr>
+//
+// 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"
+
+template<typename MatrixType> void bandmatrix(const MatrixType& _m)
+{
+  typedef typename MatrixType::Index Index;
+  typedef typename MatrixType::Scalar Scalar;
+  typedef typename NumTraits<Scalar>::Real RealScalar;
+  typedef Matrix<Scalar,Dynamic,Dynamic> DenseMatrixType;
+
+  Index rows = _m.rows();
+  Index cols = _m.cols();
+  Index supers = _m.supers();
+  Index subs = _m.subs();
+
+  MatrixType m(rows,cols,supers,subs);
+
+  DenseMatrixType dm1(rows,cols);
+  dm1.setZero();
+
+  m.diagonal().setConstant(123);
+  dm1.diagonal().setConstant(123);
+  for (int i=1; i<=m.supers();++i)
+  {
+    m.diagonal(i).setConstant(static_cast<RealScalar>(i));
+    dm1.diagonal(i).setConstant(static_cast<RealScalar>(i));
+  }
+  for (int i=1; i<=m.subs();++i)
+  {
+    m.diagonal(-i).setConstant(-static_cast<RealScalar>(i));
+    dm1.diagonal(-i).setConstant(-static_cast<RealScalar>(i));
+  }
+  //std::cerr << m.m_data << "\n\n" << m.toDense() << "\n\n" << dm1 << "\n\n\n\n";
+  VERIFY_IS_APPROX(dm1,m.toDenseMatrix());
+
+  for (int i=0; i<cols; ++i)
+  {
+    m.col(i).setConstant(static_cast<RealScalar>(i+1));
+    dm1.col(i).setConstant(static_cast<RealScalar>(i+1));
+  }
+  Index d = (std::min)(rows,cols);
+  Index a = std::max<Index>(0,cols-d-supers);
+  Index b = std::max<Index>(0,rows-d-subs);
+  if(a>0) dm1.block(0,d+supers,rows,a).setZero();
+  dm1.block(0,supers+1,cols-supers-1-a,cols-supers-1-a).template triangularView<Upper>().setZero();
+  dm1.block(subs+1,0,rows-subs-1-b,rows-subs-1-b).template triangularView<Lower>().setZero();
+  if(b>0) dm1.block(d+subs,0,b,cols).setZero();
+  //std::cerr << m.m_data << "\n\n" << m.toDense() << "\n\n" << dm1 << "\n\n";
+  VERIFY_IS_APPROX(dm1,m.toDenseMatrix());
+
+}
+
+using Eigen::internal::BandMatrix;
+
+void test_bandmatrix()
+{
+  typedef BandMatrix<float>::Index Index;
+
+  for(int i = 0; i < 10*g_repeat ; i++) {
+    Index rows = internal::random<Index>(1,10);
+    Index cols = internal::random<Index>(1,10);
+    Index sups = internal::random<Index>(0,cols-1);
+    Index subs = internal::random<Index>(0,rows-1);
+    CALL_SUBTEST(bandmatrix(BandMatrix<float>(rows,cols,sups,subs)) );
+  }
+}