libMesh
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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 >
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 435 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 470 of file utility.h.

470  :
471  _do_reverse (rb)
472 {}
const bool _do_reverse
flag
Definition: utility.h:463

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 477 of file utility.h.

References reverse().

478 {
479  // Possibly reverse the byte ordering
480  if (this->reverse())
481  {
482  unsigned char * b = (unsigned char *) &data;
483 
484  int i=0;
485  int j=(sizeof(T) - 1);
486 
487  while (i < j)
488  {
489  std::swap (b[i], b[j]);
490  i++; j--;
491  }
492  }
493 
494  return data;
495 }

◆ reverse()

bool libMesh::Utility::ReverseBytes::reverse ( ) const
inlineprivate
Returns
The value of the reverse flag.

Definition at line 458 of file utility.h.

References _do_reverse.

Referenced by operator()().

458 { return _do_reverse; }
const bool _do_reverse
flag
Definition: utility.h:463

Member Data Documentation

◆ _do_reverse

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

flag

Definition at line 463 of file utility.h.

Referenced by reverse().


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