Point Cloud Library (PCL)  1.7.0
byte_order.h
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39 
40 #ifndef PCL_IO_PLY_BYTE_ORDER_H
41 #define PCL_IO_PLY_BYTE_ORDER_H
42 
43 #include <boost/detail/endian.hpp>
44 
45 namespace pcl
46 {
47  namespace io
48  {
49  namespace ply
50  {
51  /** \file byte_order.h
52  * defines byte shift operations and endianess.
53  * \author Ares Lagae as part of libply, Nizar Sallem
54  * \ingroup io
55  */
56 
58  {
61 #if defined(BOOST_BIG_ENDIAN)
62  host_byte_order = big_endian_byte_order,
63 #elif defined(BOOST_LITTLE_ENDIAN)
64  host_byte_order = little_endian_byte_order,
65 #else
66 #error "unable to determine system endianness"
67 #endif
69  };
70 
71  template <std::size_t N>
72  void swap_byte_order (char* bytes);
73 
74  template <>
75  inline void swap_byte_order<1> (char*) {}
76 
77  template <>
78  inline void swap_byte_order<2> (char* bytes)
79  {
80  std::swap (bytes[0], bytes[1]);
81  }
82 
83  template <>
84  inline void swap_byte_order<4> (char* bytes)
85  {
86  std::swap (bytes[0], bytes[3]);
87  std::swap (bytes[1], bytes[2]);
88  }
89 
90  template <>
91  inline void swap_byte_order<8> (char* bytes)
92  {
93  std::swap (bytes[0], bytes[7]);
94  std::swap (bytes[1], bytes[6]);
95  std::swap (bytes[2], bytes[5]);
96  std::swap (bytes[3], bytes[4]);
97  }
98 
99  template <typename T>
100  void swap_byte_order (T& value)
101  {
102  swap_byte_order<sizeof (T)> (reinterpret_cast<char*> (&value));
103  }
104 
105  } // namespace ply
106  } // namespace io
107 } // namespace pcl
108 
109 #endif // PLY_BYTE_ORDER_H