libMesh::Utility::ReverseBytes Class Reference

This Functor simply takes an object and reverses its byte representation. More...

#include <utility.h>

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

Private Member Functions
bool	reverse () const

Private Attributes
const bool	_do_reverse
	flag More...

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 337 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 372 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 379 of file utility.h.

{
  // 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;
}

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

reverse()

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

inlineprivate

Returns

The value of the reverse flag.

Definition at line 360 of file utility.h.

{ return _do_reverse; }

References _do_reverse.

Referenced by operator()().

Member Data Documentation

_do_reverse

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

private

flag

Definition at line 365 of file utility.h.

Referenced by reverse().

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

• include/utils/utility.h