OFUUIDGenerator Class Reference

The OFUUIDGenerator class provides a means to create an OFUUID. More...

Classes
class	Uint32_32
	Helper type for internal use in OFUUIDGenerator. More...

Public Types
typedef Uint8(*)	rnd8()
	The type of a user providable random number generator (RNG) functor.

Static Public Member Functions
static OFshared_ptr< OFUUID >	create (rnd8 const &=getRND8)
	Creates an OFUUID based on RFC 9562, section 5.7.

Private Member Functions
	OFUUIDGenerator ()
	Default constructor.
virtual	~OFUUIDGenerator ()
	Destructor.

Static Private Member Functions
static Uint32_32	getMillisecondsSinceEpoch ()
	Calculates the number of milliseconds since January 1, 1970.
static Uint8	getRND8 ()
	Wrapper for OFRandom::getRND8.
static OFBool	initializeIfNecessary ()
	Checks whether initialization is necessary and performs it if required.
static void	setupOFUUIDDataMember (OFUUID *const ofuuid, rnd8 const &rnd)
	Sets up the individual fields (OFUUID::data_) of an OFUUID.

Detailed Description

The OFUUIDGenerator class provides a means to create an OFUUID.

Member Function Documentation

create()

OFshared_ptr< OFUUID > OFUUIDGenerator::create ( rnd8 const & = getRND8 )

static

Creates an OFUUID based on RFC 9562, section 5.7.

Parameters

rnd	A random number generator (RNG) functor. Provide if special requirements with respect to unguessability of the to be created OFUUID exist. See RFC 9562, section 6.9 for details.

Returns

A OFshared_ptr encapsulating a newly created OFUUID instance.

Warning

The returned object may contain a null pointer (OFnullptr_t).

References getRND8().

getMillisecondsSinceEpoch()

Uint32_32 OFUUIDGenerator::getMillisecondsSinceEpoch ( )

staticprivate

Calculates the number of milliseconds since January 1, 1970.

Returns

The number of milliseconds calculated.

Warning

The result "is affected by discontinuous jumps in the system time (e.g., if the system administrator manually changes the system time)." gettimeofday(2)

getRND8()

Uint8 OFUUIDGenerator::getRND8 ( )

staticprivate

Wrapper for OFRandom::getRND8.

Returns

A random Uint8 value.

Referenced by create().

initializeIfNecessary()

OFBool OFUUIDGenerator::initializeIfNecessary ( )

staticprivate

Checks whether initialization is necessary and performs it if required.

Returns

OFTrue iff initialization succeeded.

setupOFUUIDDataMember()

void OFUUIDGenerator::setupOFUUIDDataMember ( OFUUID *const ofuuid, rnd8 const & rnd )

staticprivate

Sets up the individual fields (OFUUID::data_) of an OFUUID.

Parameters

[in,out]	ofuuid	The to be assembled OFUUID.
[in]	rnd	The random number genaratr functor to use.

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

• ofstd/include/dcmtk/ofstd/ofuuidgn.h