OFRandom Class Reference

Public Member Functions
	OFRandom ()
	default constructor, initializes the PRNG based on time(2) and clock(2).
virtual	~OFRandom ()
	destructor
Uint64	getRND64 ()
	return a random Uint64 value More...
Uint32	getRND32 ()
	return a random Uint32 value More...
Uint16	getRND16 ()
	return a random Uint16 value More...
void	seed (Uint32 sval)
	Re-seed the PRNG with the given parameter. More...

Private Member Functions
void	isaac ()
	generate next round of random numbers. More...
void	mixSeed ()
	mix the seed values and then generate the first round of random numbers.

Private Attributes
Uint32	randcnt
	number of random bytes still available before isaac() needs to called again
Uint32	randrsl [OFRandom_SIZ]
	random memory
Uint32	randmem [OFRandom_SIZ]
	internal state of the PRNG
Uint32	randa
	internal state of the PRNG
Uint32	randb
	internal state of the PRNG
Uint32	randc
	internal state of the PRNG

Member Function Documentation

getRND16()

Uint16 OFRandom::getRND16

(

)

return a random Uint16 value

Returns

random unsigned 16-bit number

getRND32()

Uint32 OFRandom::getRND32

(

)

return a random Uint32 value

Returns

random unsigned 32-bit number

getRND64()

Uint64 OFRandom::getRND64

(

)

return a random Uint64 value

Returns

random unsigned 64-bit number

isaac()

void OFRandom::isaac ( )

private

generate next round of random numbers.

Calling this method will cause the algorithm to generate a new set of random numbers in randrsl.

seed()

void OFRandom::seed

(

Uint32

sval

)

Re-seed the PRNG with the given parameter.

This method should only be used when a reproducible sequence of pseudo-random numbers is desired, e.g. in test routines.

Parameters

sval	seed value

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

• ofstd/include/dcmtk/ofstd/ofrand.h