Point Cloud Library (PCL)  1.12.0-dev
byte_order.h
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39 
40 #pragma once
41 
42 #include <boost/predef/other/endian.h>
43 
44 #include <cstddef>
45 #include <utility> // for swap
46 
47 namespace pcl
48 {
49  namespace io
50  {
51  namespace ply
52  {
53  /** \file byte_order.h
54  * defines byte shift operations and endianness.
55  * \author Ares Lagae as part of libply, Nizar Sallem
56  * \ingroup io
57  */
58 
60  {
63 #if BOOST_ENDIAN_BIG_BYTE
64  host_byte_order = big_endian_byte_order,
65 #elif BOOST_ENDIAN_LITTLE_BYTE
66  host_byte_order = little_endian_byte_order,
67 #else
68 #error "unable to determine system endianness"
69 #endif
71  };
72 
73  template <std::size_t N>
74  void swap_byte_order (char* bytes);
75 
76  template <>
77  inline void swap_byte_order<1> (char*) {}
78 
79  template <>
80  inline void swap_byte_order<2> (char* bytes)
81  {
82  std::swap (bytes[0], bytes[1]);
83  }
84 
85  template <>
86  inline void swap_byte_order<4> (char* bytes)
87  {
88  std::swap (bytes[0], bytes[3]);
89  std::swap (bytes[1], bytes[2]);
90  }
91 
92  template <>
93  inline void swap_byte_order<8> (char* bytes)
94  {
95  std::swap (bytes[0], bytes[7]);
96  std::swap (bytes[1], bytes[6]);
97  std::swap (bytes[2], bytes[5]);
98  std::swap (bytes[3], bytes[4]);
99  }
100 
101  template <typename T>
102  void swap_byte_order (T& value)
103  {
104  swap_byte_order<sizeof (T)> (reinterpret_cast<char*> (&value));
105  }
106 
107  } // namespace ply
108  } // namespace io
109 } // namespace pcl
pcl
Definition: convolution.h:46
pcl::io::ply::little_endian_byte_order
@ little_endian_byte_order
Definition: byte_order.h:61
pcl::io::ply::big_endian_byte_order
@ big_endian_byte_order
Definition: byte_order.h:62
pcl::io::ply::swap_byte_order< 1 >
void swap_byte_order< 1 >(char *)
Definition: byte_order.h:77
pcl::io::ply::swap_byte_order< 8 >
void swap_byte_order< 8 >(char *bytes)
Definition: byte_order.h:93
pcl::io::ply::byte_order
byte_order
Definition: byte_order.h:59
pcl::io::ply::swap_byte_order
void swap_byte_order(char *bytes)
pcl::io::ply::swap_byte_order< 2 >
void swap_byte_order< 2 >(char *bytes)
Definition: byte_order.h:80
pcl::io::ply::swap_byte_order< 4 >
void swap_byte_order< 4 >(char *bytes)
Definition: byte_order.h:86
pcl::io::ply::network_byte_order
@ network_byte_order
Definition: byte_order.h:70