byte_order.h
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00001 /*
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00036  * $Id: byte_order.h 4868 2012-03-01 02:50:19Z rusu $
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00038  */
00039 
00040 #ifndef PCL_IO_PLY_BYTE_ORDER_H
00041 #define PCL_IO_PLY_BYTE_ORDER_H
00042 
00043 namespace pcl
00044 {
00045   namespace io
00046   {
00047     namespace ply
00048     {
00055 #if defined (PLY_BIG_ENDIAN) || defined (PLY_LITTLE_ENDIAN)
00056 #  error
00057 #endif
00058 
00059 #if (defined (__powerpc) || defined (__powerpc__) || defined (__POWERPC__) || defined (__ppc__) || defined (_M_PPC) || defined (__ARCH_PPC))
00060 #  define PLY_BIG_ENDIAN
00061 #elif (defined (i386) || defined (__i386__) || defined (__i386) || defined (_M_IX86) || defined (_X86_) || defined (__THW_INTEL__) || defined (__I86__) || defined (__INTEL__)) \
00062   || (defined (__amd64__) || defined (__amd64) || defined (__x86_64__) || defined (__x86_64) || defined (_M_X64) || defined (ANDROID))
00063 #  define PLY_LITTLE_ENDIAN
00064 #else
00065 #  error
00066 #endif
00067 
00068       enum byte_order
00069       {
00070         little_endian_byte_order,
00071         big_endian_byte_order,
00072 #if defined (PLY_BIG_ENDIAN)
00073         host_byte_order = big_endian_byte_order,
00074 #elif defined (PLY_LITTLE_ENDIAN)
00075         host_byte_order = little_endian_byte_order,
00076 #else
00077 #  error
00078 #endif
00079         network_byte_order = big_endian_byte_order
00080       };
00081       
00082 #undef PLY_BIG_ENDIAN
00083 #undef PLY_LITTLE_ENDIAN
00084       
00085       template <std::size_t N>
00086       void swap_byte_order (char* bytes);
00087 
00088       template <>
00089       inline void swap_byte_order<1> (char*) {}
00090 
00091       template <>
00092       inline void swap_byte_order<2> (char* bytes)
00093       {
00094         std::swap (bytes[0], bytes[1]);
00095       }
00096 
00097       template <>
00098         inline void swap_byte_order<4> (char* bytes)
00099       {
00100         std::swap (bytes[0], bytes[3]);
00101         std::swap (bytes[1], bytes[2]);
00102       }
00103       
00104       template <>
00105         inline void swap_byte_order<8> (char* bytes)
00106       {
00107         std::swap (bytes[0], bytes[7]);
00108         std::swap (bytes[1], bytes[6]);
00109         std::swap (bytes[2], bytes[5]);
00110         std::swap (bytes[3], bytes[4]);
00111       }
00112       
00113       template <typename T>
00114       void swap_byte_order (T& value)
00115       {
00116         swap_byte_order<sizeof (T)> (reinterpret_cast<char*> (&value));
00117       }
00118 
00119     } // namespace ply
00120   } // namespace io
00121 } // namespace pcl
00122 
00123 #endif // PLY_BYTE_ORDER_H


pcl
Author(s): Open Perception
autogenerated on Mon Oct 6 2014 03:14:40