Point Cloud Library (PCL)  1.9.1-dev
byte_order.h
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39 
40 #pragma once
41 
42 #include <boost/predef/other/endian.h>
43 
44 namespace pcl
45 {
46  namespace io
47  {
48  namespace ply
49  {
50  /** \file byte_order.h
51  * defines byte shift operations and endianness.
52  * \author Ares Lagae as part of libply, Nizar Sallem
53  * \ingroup io
54  */
55 
57  {
60 #if BOOST_ENDIAN_BIG_BYTE
61  host_byte_order = big_endian_byte_order,
62 #elif BOOST_ENDIAN_LITTLE_BYTE
63  host_byte_order = little_endian_byte_order,
64 #else
65 #error "unable to determine system endianness"
66 #endif
68  };
69 
70  template <std::size_t N>
71  void swap_byte_order (char* bytes);
72 
73  template <>
74  inline void swap_byte_order<1> (char*) {}
75 
76  template <>
77  inline void swap_byte_order<2> (char* bytes)
78  {
79  std::swap (bytes[0], bytes[1]);
80  }
81 
82  template <>
83  inline void swap_byte_order<4> (char* bytes)
84  {
85  std::swap (bytes[0], bytes[3]);
86  std::swap (bytes[1], bytes[2]);
87  }
88 
89  template <>
90  inline void swap_byte_order<8> (char* bytes)
91  {
92  std::swap (bytes[0], bytes[7]);
93  std::swap (bytes[1], bytes[6]);
94  std::swap (bytes[2], bytes[5]);
95  std::swap (bytes[3], bytes[4]);
96  }
97 
98  template <typename T>
99  void swap_byte_order (T& value)
100  {
101  swap_byte_order<sizeof (T)> (reinterpret_cast<char*> (&value));
102  }
103 
104  } // namespace ply
105  } // namespace io
106 } // namespace pcl
This file defines compatibility wrappers for low level I/O functions.
Definition: convolution.h:45
void swap_byte_order< 2 >(char *bytes)
Definition: byte_order.h:77
void swap_byte_order< 1 >(char *)
Definition: byte_order.h:74
void swap_byte_order< 8 >(char *bytes)
Definition: byte_order.h:90
void swap_byte_order(char *bytes)
void swap_byte_order< 4 >(char *bytes)
Definition: byte_order.h:83