G4SurfBits Class Reference

#include <G4SurfBits.hh>

Public Member Functions
	G4SurfBits (unsigned int nbits=0)
	G4SurfBits (const G4SurfBits &)
G4SurfBits &	operator= (const G4SurfBits &)
	~G4SurfBits ()
void	ResetAllBits (G4bool value=false)
void	ResetBitNumber (unsigned int bitnumber)
void	SetBitNumber (unsigned int bitnumber, G4bool value=true)
G4bool	TestBitNumber (unsigned int bitnumber) const
G4bool	operator[] (unsigned int bitnumber) const
void	set (unsigned int nbits, const char *array)
void	set (unsigned int nbits, const G4int *array)
void	Get (char *array) const
void	Get (G4int *array) const
void	Clear ()
void	Compact ()
unsigned int	GetNbits () const
unsigned int	GetNbytes () const
void	Print () const
void	Output (std::ostream &) const

Public Attributes
unsigned char *	fAllBits

Protected Member Functions
void	ReserveBytes (unsigned int nbytes)

Protected Attributes
unsigned int	fNBits
unsigned int	fNBytes

Detailed Description

Definition at line 59 of file G4SurfBits.hh.

Constructor & Destructor Documentation

G4SurfBits::G4SurfBits

(

unsigned int

nbits = 0

)

Definition at line 43 of file G4SurfBits.cc.

                                         : fNBits(nBits)
{
  // G4SurfBits constructor.  All bits set to 0

  if (fNBits <= 0) fNBits = 0;
  fNBytes  = fNBits ? ((fNBits-1)/8) + 1 : 1;
  fAllBits = new unsigned char[fNBytes];
  // this is redundant only with libNew
  std::memset(fAllBits,0,fNBytes);
}

G4SurfBits::G4SurfBits

(

const G4SurfBits &

original

)

Definition at line 55 of file G4SurfBits.cc.

                                                 : fNBits(original.fNBits),
  fNBytes(original.fNBytes)
{
  // G4SurfBits copy constructor

  fAllBits = new unsigned char[fNBytes];
  std::memcpy(fAllBits,original.fAllBits,fNBytes);
}

G4SurfBits::~G4SurfBits

(

)

Definition at line 84 of file G4SurfBits.cc.

{
  // G4SurfBits destructor

  delete [] fAllBits;
}

Member Function Documentation

void G4SurfBits::Clear

(

)

Definition at line 92 of file G4SurfBits.cc.

{
  // Clear the value.

  delete [] fAllBits;
  fAllBits = 0;
  fNBits   = 0;
  fNBytes  = 0;
}

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void G4SurfBits::Compact

(

)

Definition at line 103 of file G4SurfBits.cc.

{
  // Reduce the storage used by the object to a minimun

  if (!fNBits || !fAllBits) return;
  unsigned int needed;
  for(needed=fNBytes-1;
    needed > 0 && fAllBits[needed]==0; ) { needed--; };
    needed++;

  if (needed!=fNBytes) {
    unsigned char *old_location = fAllBits;
    fAllBits = new unsigned char[needed];

    std::memcpy(fAllBits,old_location,needed);
    delete [] old_location;

    fNBytes = needed;
    fNBits = 8*fNBytes;
  }
}

void G4SurfBits::Get

(

char *

array

)

const

Definition at line 186 of file G4SurfBits.cc.

{
  // Copy all the byes.
  std::memcpy(array, fAllBits, (fNBits+7)>>3);
}

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void G4SurfBits::Get

(

G4int *

array

)

const

Definition at line 204 of file G4SurfBits.cc.

{
  // Get all the bytes.

  Get((char*)array);
}

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unsigned int G4SurfBits::GetNbits ( ) const

inline

Definition at line 101 of file G4SurfBits.hh.

{ return fNBits; }

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unsigned int G4SurfBits::GetNbytes ( ) const

inline

Definition at line 102 of file G4SurfBits.hh.

{ return fNBytes; }

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G4SurfBits & G4SurfBits::operator=

(

const G4SurfBits &

rhs

)

Definition at line 65 of file G4SurfBits.cc.

{
  // G4SurfBits assignment operator
  if (this != &rhs) {
    //      TObject::operator=(rhs);
    fNBits   = rhs.fNBits;
    fNBytes  = rhs.fNBytes;
    delete [] fAllBits;
    if (fNBytes != 0) {
      fAllBits = new unsigned char[fNBytes];
      std::memcpy(fAllBits,rhs.fAllBits,fNBytes);
    } else {
      fAllBits = 0;
    }
  }
  return *this;
}

G4bool G4SurfBits::operator[] ( unsigned int  bitnumber ) const

inline

Definition at line 166 of file G4SurfBits.hh.

{
  return TestBitNumber(bitnumber);
}

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void G4SurfBits::Output

(

std::ostream &

os

)

const

Definition at line 126 of file G4SurfBits.cc.

{
  // Print the value to the std::ostream
  for(unsigned int i=0; i<fNBytes; ++i) {
    unsigned char val = fAllBits[fNBytes - 1 - i];
    for (unsigned int j=0; j<8; ++j) {
      os << (G4bool)(val&0x80);
      val <<= 1;
    }
  }
}

void G4SurfBits::Print

(

void

)

const

Definition at line 139 of file G4SurfBits.cc.

{
  // Print the list of active bits
  G4int count = 0;
  for(unsigned int i=0; i<fNBytes; ++i) {
    unsigned char val = fAllBits[i];
    for (unsigned int j=0; j<8; ++j) {
      if (val & 1) G4cout << " bit:" << count << " = 1" << G4endl;
      count++;
      val = val >> 1;
    }
  }
}

void G4SurfBits::ReserveBytes ( unsigned int  nbytes )

protected

Definition at line 160 of file G4SurfBits.cc.

{
  // Reverse each bytes.

  if (nbytes > fNBytes) {
    // do it in this order to remain exception-safe.
    unsigned char *newBits=new unsigned char[nbytes];
    delete[] fAllBits;
    fNBytes=nbytes;
    fAllBits=newBits;
  }
}

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void G4SurfBits::ResetAllBits

(

G4bool

value = false

)

Definition at line 154 of file G4SurfBits.cc.

{
  if (fAllBits) std::memset(fAllBits, value ? 0xFF : 0,fNBytes);
}

void G4SurfBits::ResetBitNumber ( unsigned int  bitnumber )

inline

Definition at line 161 of file G4SurfBits.hh.

{
  SetBitNumber(bitnumber,false);
}

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void G4SurfBits::set	(	unsigned int	nbits,
		const char *	array
	)

Definition at line 174 of file G4SurfBits.cc.

{
  // set all the bytes
  unsigned int nbytes=(nBits+7)>>3;

  ReserveBytes(nbytes);

  fNBits=nBits;
  std::memcpy(fAllBits, array, nbytes);
}

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void G4SurfBits::set	(	unsigned int	nbits,
		const G4int *	array
	)

Definition at line 196 of file G4SurfBits.cc.

{
  // set all the bytes.

  set(nBits, (const char*)array);
}

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void G4SurfBits::SetBitNumber ( unsigned int  bitnumber, G4bool  value = true  )

inline

Definition at line 123 of file G4SurfBits.hh.

{
  // set bit number 'bitnumber' to be value
  if (bitnumber >= fNBits) {
    unsigned int new_size = (bitnumber/8) + 1;
    if (new_size > fNBytes) {
      if (new_size < 100 * 1024 * 1024)
        new_size *= 2;
      unsigned char *old_location = fAllBits;
      fAllBits = new unsigned char[new_size];
      std::memcpy(fAllBits,old_location,fNBytes);
      std::memset(fAllBits+fNBytes ,0, new_size-fNBytes);
      fNBytes = new_size;
      delete [] old_location;
    }
    fNBits = bitnumber+1;
  }
  unsigned int  loc = bitnumber/8;
  unsigned char bit = bitnumber%8;
  if (value)
    fAllBits[loc] |= (1<<bit);
  else
    fAllBits[loc] &= (0xFF ^ (1<<bit));
}

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G4bool G4SurfBits::TestBitNumber ( unsigned int  bitnumber ) const

inline

Definition at line 148 of file G4SurfBits.hh.

{
  // Return the current value of the bit

  if (bitnumber >= fNBits) return false;
  unsigned int  loc = bitnumber/8;
  unsigned char value = fAllBits[loc];
  unsigned char bit = bitnumber%8;
  G4bool  result = (value & (1<<bit)) != 0;
  return result;
  // short: return 0 != (fAllBits[bitnumber/8] & (1<< (bitnumber%8)));
}

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Member Data Documentation

unsigned char* G4SurfBits::fAllBits

Definition at line 113 of file G4SurfBits.hh.

unsigned int G4SurfBits::fNBits

protected

Definition at line 117 of file G4SurfBits.hh.

unsigned int G4SurfBits::fNBytes

protected

Definition at line 118 of file G4SurfBits.hh.

---

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

• source/geant4.10.03.p02/source/geometry/solids/specific/include/G4SurfBits.hh
• source/geant4.10.03.p02/source/geometry/solids/specific/src/G4SurfBits.cc