Description

template<typename E, typename V = int64_t>
class Sawyer::BitFlags< E, V >

Stores a vector of enum bit flags.

This is a more self-documenting and terse way to use bit flags. For example, consider this original code:

class TableCharacter {
    enum Corner { NONE = 0, LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
    unsigned current; // bit vector of Corner flags for current character
    unsigned previous; // bit vector of Corner flags for previous character
    TableCharacter(): current(NONE), previous(NONE) {}
    void process(unsigned next) { // next is vector of Corner bit flags
        if ((current & LEFT) != 0) {
            previous |= LEFT;
            current &= ~LEFT;
        }
        if ((next & TOP) == 0) {
            current &= ~TOP;
            current |= BOTTOM;
        }
    }
};

Now rewritten to use this class:

class TableCharacter {
    enum Corner { NONE = 0, LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
    BitFlags<Corner> current;
    BitFlags<Corner> previous;
    TableCharacters(): current(NONE), previous(NONE) {}
    void process(BitFlags<Corner> next) {
        if (current.testAndClear(LEFT))
            previous.set(LEFT);
        if (next.isClear(TOP))
            current.clear(TOP).set(BOTTOM);
    }
};

Definition at line 66 of file util/Sawyer/BitFlags.h.

#include <util/Sawyer/BitFlags.h>

Inheritance diagram for Sawyer::BitFlags< E, V >:

[legend]

Public Types
typedef E	Enum

typedef V	Vector

Public Member Functions
	BitFlags ()
	Default constructor with all bits clear. More...

	BitFlags (Vector v)
	Construct bit vector from value or bit. More...

	BitFlags (E e)

Vector	vector () const
	Current value of the bit vector. More...

bool	isSet (Enum e) const
	Test whether a bit is set. More...

bool	isAllSet (BitFlags other) const
	True if all specified bits are set. More...

bool	isAnySet (BitFlags other) const
	True if any of the specified bits are set. More...

bool	isAnySet () const
	True if any bit is set. More...

bool	isEmpty () const
	True if no bits are set. More...

bool	isClear (Enum e) const
	Test whether a bit is clear. More...

BitFlags &	set (Enum e)
	Set the specified bit. More...

BitFlags &	set (BitFlags other)
	Set all bits that are set in `other`. More...

BitFlags &	clear (Enum e)
	Clear the specified bit. More...

BitFlags &	clear (BitFlags other)
	Clear all bits that are set in `other`. More...

BitFlags &	clear ()
	Clear all bits. More...

bool	testAndClear (Enum e)
	Test whether a bit is set, then clear it. More...

bool	testAndSet (Enum e)
	Test whether a bit is set, then set it. More...

BitFlags &	operator= (Vector v)
	Set the vector to an exact value. More...

BitFlags &	operator= (BitFlags other)
	Set the vector to the same as another. More...

std::vector< Enum >	split (std::vector< int64_t > constants, Vector &leftovers) const
	Split a vector into the individual enum values. More...

std::vector< Enum >	split (Vector &leftovers) const
	Split a vector into the individual bits values. More...


BitFlags	operator\| (BitFlags other) const
	Create a new vector that's the union of two vectors.

BitFlags	operator\| (Enum e) const
	Create a new vector that's the union of two vectors.


BitFlags	intersection (BitFlags other) const
	Create a new vector that's the intersection of two vectors.

BitFlags	intersection (Enum e) const
	Create a new vector that's the intersection of two vectors.

BitFlags	operator& (BitFlags other) const
	Create a new vector that's the intersection of two vectors.

BitFlags	operator& (Enum e) const
	Create a new vector that's the intersection of two vectors.


bool	operator== (BitFlags other) const
	Compare two vectors.

bool	operator!= (BitFlags other) const
	Compare two vectors.

bool	operator< (BitFlags other) const
	Compare two vectors.

bool	operator<= (BitFlags other) const
	Compare two vectors.

bool	operator> (BitFlags other) const
	Compare two vectors.

bool	operator>= (BitFlags other) const
	Compare two vectors.

Constructor & Destructor Documentation

template<typename E, typename V = int64_t>

Sawyer::BitFlags< E, V >::BitFlags ( )

inline

Default constructor with all bits clear.

Definition at line 84 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

Sawyer::BitFlags< E, V >::BitFlags ( Vector v )

inline

Construct bit vector from value or bit.

Definition at line 88 of file util/Sawyer/BitFlags.h.

Member Function Documentation

template<typename E, typename V = int64_t>

Vector Sawyer::BitFlags< E, V >::vector ( ) const

inline

Current value of the bit vector.

Definition at line 95 of file util/Sawyer/BitFlags.h.

Referenced by Rose::BitFlags< Reason, uint32_t >::toString().

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::isSet ( Enum e ) const

inline

Test whether a bit is set.

Definition at line 100 of file util/Sawyer/BitFlags.h.

Referenced by Sawyer::BitFlags< Reason, uint32_t >::isClear(), Sawyer::BitFlags< Reason, uint32_t >::split(), Sawyer::BitFlags< Reason, uint32_t >::testAndClear(), Sawyer::BitFlags< Reason, uint32_t >::testAndSet(), and Rose::BinaryAnalysis::Debugger::trace().

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::isAllSet ( BitFlags< E, V > other ) const

inline

True if all specified bits are set.

Definition at line 105 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::isAnySet ( BitFlags< E, V > other ) const

inline

True if any of the specified bits are set.

Definition at line 110 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::isAnySet ( ) const

inline

True if any bit is set.

Definition at line 115 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::isEmpty ( ) const

inline

True if no bits are set.

Definition at line 120 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::isClear ( Enum e ) const

inline

Test whether a bit is clear.

Definition at line 125 of file util/Sawyer/BitFlags.h.

Referenced by Rose::BinaryAnalysis::Debugger::trace().

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::set ( Enum e )

inline

Set the specified bit.

Definition at line 130 of file util/Sawyer/BitFlags.h.

Referenced by Sawyer::BitFlags< Reason, uint32_t >::testAndSet().

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::set ( BitFlags< E, V > other )

inline

Set all bits that are set in other.

Definition at line 136 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::clear ( Enum e )

inline

Clear the specified bit.

Definition at line 142 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::clear ( BitFlags< E, V > other )

inline

Clear all bits that are set in other.

Definition at line 148 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::clear ( )

inline

Clear all bits.

Definition at line 154 of file util/Sawyer/BitFlags.h.

Referenced by Sawyer::BitFlags< Reason, uint32_t >::testAndClear().

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::testAndClear ( Enum e )

inline

Test whether a bit is set, then clear it.

Definition at line 160 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

bool Sawyer::BitFlags< E, V >::testAndSet ( Enum e )

inline

Test whether a bit is set, then set it.

Definition at line 167 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::operator= ( Vector v )

inline

Set the vector to an exact value.

Definition at line 174 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

BitFlags& Sawyer::BitFlags< E, V >::operator= ( BitFlags< E, V > other )

inline

Set the vector to the same as another.

Definition at line 180 of file util/Sawyer/BitFlags.h.

template<typename E, typename V = int64_t>

std::vector<Enum> Sawyer::BitFlags< E, V >::split	(	std::vector< int64_t >	constants,
		Vector &	leftovers
	)		const

inline

Split a vector into the individual enum values.

The enum constants are first sorted so that those with more set bits appear before those with fewer bits. Then each constant is searched in the bit vector and those bits are removed. This continues until either no bits remain or no matching constant is found. The leftovers is set to those bits that could not be matched by this process.

Definition at line 241 of file util/Sawyer/BitFlags.h.

Referenced by Rose::BitFlags< Reason, uint32_t >::toString().

template<typename E, typename V = int64_t>

std::vector<Enum> Sawyer::BitFlags< E, V >::split ( Vector & leftovers ) const

inline

Split a vector into the individual bits values.

Definition at line 264 of file util/Sawyer/BitFlags.h.

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

util/Sawyer/BitFlags.h

Description

template<typename E, typename V = int64_t> class Sawyer::BitFlags< E, V >

Public Types

Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation

template<typename E, typename V = int64_t>
class Sawyer::BitFlags< E, V >