libMesh::Utility::ReverseBytes Class Reference

#include <utility.h>

Public Member Functions
	ReverseBytes (const bool dr)
template<typename T >
T	operator() (T &data) const

Private Member Functions
bool	reverse () const

Private Attributes
const bool	_do_reverse

Detailed Description

This Functor simply takes an object and reverses its byte representation. This is useful for changing endian-ness for file IO. This class has been tested on x86 architectures with 4-byte words.

Definition at line 289 of file utility.h.

Constructor & Destructor Documentation

ReverseBytes()

libMesh::Utility::ReverseBytes::ReverseBytes ( const bool  dr )

inlineexplicit

Constructor. Takes a bool, determines if we will actually do byte reversing.

Definition at line 324 of file utility.h.

                                         :
  _do_reverse (rb)
{}

Member Function Documentation

operator()()

template<typename T >

T libMesh::Utility::ReverseBytes::operator() ( T &  data ) const

inline

Functor. Takes the data to reverse and performs the byte-ordering reversal.

Definition at line 331 of file utility.h.

References data, reverse(), and swap().

{
  // Possibly reverse the byte ordering
  if (this->reverse())
    {
      unsigned char * b = (unsigned char *) &data;

      int i=0;
      int j=(sizeof(T) - 1);

      while (i < j)
        {
          std::swap (b[i], b[j]);
          i++; j--;
        }
    }

  return data;
}

reverse()

bool libMesh::Utility::ReverseBytes::reverse ( ) const

inlineprivate

Returns

The value of the reverse flag.

Definition at line 312 of file utility.h.

References _do_reverse.

Referenced by operator()().

{ return _do_reverse; }

Member Data Documentation

_do_reverse

const bool libMesh::Utility::ReverseBytes::_do_reverse

private

flag

Definition at line 317 of file utility.h.

Referenced by reverse().

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The documentation for this class was generated from the following file:

• utility.h