From 75580c5ea4da0a2bc1a75424a9d36e25eabac8d8 Mon Sep 17 00:00:00 2001
From: fgodi <fgodi@636b058d-ea47-450e-bf9e-a15bfbe3eedb>
Date: Thu, 29 Mar 2018 18:16:46 +0000
Subject: fvecs reader

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/toplex_map@3321 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: a57c3e9b3258a25ff1d59f0b8ce135ebb19188cf
---
 src/common/include/gudhi/Points_fvecs_reader.h | 68 ++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/common/include/gudhi/Points_fvecs_reader.h

(limited to 'src')

diff --git a/src/common/include/gudhi/Points_fvecs_reader.h b/src/common/include/gudhi/Points_fvecs_reader.h
new file mode 100644
index 00000000..eb03bb72
--- /dev/null
+++ b/src/common/include/gudhi/Points_fvecs_reader.h
@@ -0,0 +1,68 @@
+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Vincent Rouvreau
+ *
+ *    Copyright (C) 2015  INRIA Saclay (France)
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef POINTS_FVECS_READER_H_
+#define POINTS_FVECS_READER_H_
+
+namespace Gudhi {
+
+template<typename Kernel, typename OutputIteratorPoints>
+bool load_points_from_fvecs_file(const std::string &filename, OutputIteratorPoints points, int only_the_first_n_points = -1)
+{
+  typedef typename Kernel::Point_d Point;
+
+  std::ifstream in(filename, std::ios::binary);
+  if (!in.is_open()) {
+    std::cerr << "Could not open '" << filename << "'" << std::endl;
+    return false;
+  }
+
+  Kernel k;
+  unsigned long pt_dim = 0;
+
+  in.read(reinterpret_cast<char*>(&pt_dim), 4);
+  std::vector<float> current_pt;
+  current_pt.reserve(pt_dim);
+  for (int c = 0; !in.fail() && c != only_the_first_n_points; ++c) {
+
+    for (int j = 0; j < pt_dim; ++j)
+    {
+      float coord = 0.f;
+      in.read(reinterpret_cast<char*>(&coord), 4);
+      current_pt.push_back(coord);
+    }
+
+    *points++ = Point(current_pt.begin(), current_pt.end());
+    current_pt.clear();
+    in.read(reinterpret_cast<char*>(&pt_dim), 4);
+  }
+
+#ifdef DEBUG_TRACES
+  std::cerr << "'" << filename << "' loaded." << std::endl;
+#endif
+
+  return true;
+}
+
+
+}  // namespace Gudhi
+
+#endif  // POINTS_FVECS_READER_H_
-- 
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