Changed OpenMesh directory structure

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@106 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Core/IO/BinaryHelper.cc

@@ -0,0 +1,179 @@
+//=============================================================================
+//                                                                            
+//                               OpenMesh                                     
+//        Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen          
+//                           www.openmesh.org                                 
+//                                                                            
+//-----------------------------------------------------------------------------
+//                                                                            
+//                                License                                     
+//                                                                            
+//   This library is free software; you can redistribute it and/or modify it 
+//   under the terms of the GNU Lesser General Public License as published   
+//   by the Free Software Foundation, version 2.1.                           
+//                                                                             
+//   This library 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         
+//   Lesser General Public License for more details.                           
+//                                                                            
+//   You should have received a copy of the GNU Lesser General Public          
+//   License along with this library; if not, write to the Free Software       
+//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 
+//                                                                            
+//-----------------------------------------------------------------------------
+//                                                                            
+//   $Revision$
+//   $Date$
+//                                                                            
+//=============================================================================
+
+
+//=============================================================================
+//
+//  Helper Functions for binary reading / writing
+//
+//=============================================================================
+
+
+//== INCLUDES =================================================================
+
+
+#include <OpenMesh/Core/System/config.h>
+// -------------------- STL
+#include <algorithm>
+// -------------------- OpenMesh
+#include <OpenMesh/Core/IO/BinaryHelper.hh>
+
+
+//== NAMESPACES ===============================================================
+
+
+namespace OpenMesh {
+namespace IO {
+
+#ifndef DOXY_IGNORE_THIS
+
+//== IMPLEMENTATION ===========================================================
+
+
+union u1 { short int s;  unsigned char c[2]; }  sc;
+union u2 { int i;        unsigned char c[4]; }  ic;
+union u3 { float f;      unsigned char c[4]; }  fc;
+union u4 { double d;     unsigned char c[8]; }  dc;
+
+
+//-----------------------------------------------------------------------------
+
+short int read_short(FILE* _in, bool _swap) 
+{
+  fread((char*)sc.c, 1, 2, _in);
+  if (_swap) std::swap(sc.c[0], sc.c[1]);
+  return sc.s;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+int read_int(FILE* _in, bool _swap) 
+{
+  fread((char*)ic.c, 1, 4, _in);
+  if (_swap) {
+    std::swap(ic.c[0], ic.c[3]);
+    std::swap(ic.c[1], ic.c[2]);
+  }
+  return ic.i;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+float read_float(FILE* _in, bool _swap) 
+{
+  fread((char*)fc.c, 1, 4, _in);
+  if (_swap) {
+    std::swap(fc.c[0], fc.c[3]);
+    std::swap(fc.c[1], fc.c[2]);
+  }
+  return fc.f;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+double read_double(FILE* _in, bool _swap) 
+{
+  fread((char*)dc.c, 1, 8, _in);
+  if (_swap) {
+    std::swap(dc.c[0], dc.c[7]);
+    std::swap(dc.c[1], dc.c[6]);
+    std::swap(dc.c[2], dc.c[5]);
+    std::swap(dc.c[3], dc.c[4]);
+  }
+  return dc.d;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+void write_short(short int _i, FILE* _out, bool _swap) 
+{
+  sc.s = _i;
+  if (_swap) std::swap(sc.c[0], sc.c[1]);
+  fwrite((char*)sc.c, 1, 2, _out);
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+void write_int(int _i, FILE* _out, bool _swap) 
+{
+  ic.i = _i;
+  if (_swap) {
+    std::swap(ic.c[0], ic.c[3]);
+    std::swap(ic.c[1], ic.c[2]);
+  }
+  fwrite((char*)ic.c, 1, 4, _out);
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+void write_float(float _f, FILE* _out, bool _swap) 
+{
+  fc.f = _f;
+  if (_swap) {
+    std::swap(fc.c[0], fc.c[3]);
+    std::swap(fc.c[1], fc.c[2]);
+  }
+  fwrite((char*)fc.c, 1, 4, _out);
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+void write_double(double _d, FILE* _out, bool _swap) 
+{
+  dc.d = _d;
+  if (_swap) {
+    std::swap(dc.c[0], dc.c[7]);
+    std::swap(dc.c[1], dc.c[6]);
+    std::swap(dc.c[2], dc.c[5]);
+    std::swap(dc.c[3], dc.c[4]);
+  }
+  fwrite((char*)dc.c, 1, 8, _out);
+}
+
+#endif
+
+//=============================================================================
+} // namespace IO
+} // namespace OpenMesh
+//=============================================================================