1 files changed, 92 insertions, 0 deletions
diff --git a/internal/ceres/block_structure.cc b/internal/ceres/block_structure.cc
new file mode 100644
index 0000000..e611311
--- /dev/null
+++ b/internal/ceres/block_structure.cc
@@ -0,0 +1,92 @@
+// Ceres Solver - A fast non-linear least squares minimizer
+// Copyright 2010, 2011, 2012 Google Inc. All rights reserved.
+// http://code.google.com/p/ceres-solver/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors may be
+//   used to endorse or promote products derived from this software without
+//   specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: sameeragarwal@google.com (Sameer Agarwal)
+
+#include "ceres/block_structure.h"
+#include "ceres/matrix_proto.h"
+
+namespace ceres {
+namespace internal {
+
+bool CellLessThan(const Cell& lhs, const Cell& rhs) {
+  return (lhs.block_id < rhs.block_id);
+}
+
+#ifndef CERES_NO_PROTOCOL_BUFFERS
+void ProtoToBlockStructure(const BlockStructureProto &proto,
+                           CompressedRowBlockStructure *block_structure) {
+  // Decode the column blocks.
+  block_structure->cols.resize(proto.cols_size());
+  for (int i = 0; i < proto.cols_size(); ++i) {
+    block_structure->cols[i].size = proto.cols(i).size();
+    block_structure->cols[i].position =
+        proto.cols(i).position();
+  }
+  // Decode the row structure.
+  block_structure->rows.resize(proto.rows_size());
+  for (int i = 0; i < proto.rows_size(); ++i) {
+    const CompressedRowProto &row = proto.rows(i);
+    block_structure->rows[i].block.size = row.block().size();
+    block_structure->rows[i].block.position = row.block().position();
+
+    // Copy the cells within the row.
+    block_structure->rows[i].cells.resize(row.cells_size());
+    for (int j = 0; j < row.cells_size(); ++j) {
+      const CellProto &cell = row.cells(j);
+      block_structure->rows[i].cells[j].block_id = cell.block_id();
+      block_structure->rows[i].cells[j].position = cell.position();
+    }
+  }
+}
+
+void BlockStructureToProto(const CompressedRowBlockStructure &block_structure,
+                           BlockStructureProto *proto) {
+  // Encode the column blocks.
+  for (int i = 0; i < block_structure.cols.size(); ++i) {
+    BlockProto *block = proto->add_cols();
+    block->set_size(block_structure.cols[i].size);
+    block->set_position(block_structure.cols[i].position);
+  }
+  // Encode the row structure.
+  for (int i = 0; i < block_structure.rows.size(); ++i) {
+    CompressedRowProto *row = proto->add_rows();
+    BlockProto *block = row->mutable_block();
+    block->set_size(block_structure.rows[i].block.size);
+    block->set_position(block_structure.rows[i].block.position);
+    for (int j = 0; j < block_structure.rows[i].cells.size(); ++j) {
+      CellProto *cell = row->add_cells();
+      cell->set_block_id(block_structure.rows[i].cells[j].block_id);
+      cell->set_position(block_structure.rows[i].cells[j].position);
+    }
+  }
+}
+#endif
+
+}  // namespace internal
+}  // namespace ceres