Copyright	Will Thompson Iñaki García Etxebarria and Jonas Platte
License	LGPL-2.1
Maintainer	Iñaki García Etxebarria (garetxe@gmail.com)
Safe Haskell	None
Language	Haskell2010

GI.GLib.Structs.Rand

Contents

Exported types
Methods

Description

The GRand struct is an opaque data structure. It should only be accessed through the g_rand_* functions.

Synopsis

newtype Rand = Rand (ManagedPtr Rand)
noRand :: Maybe Rand
randDouble :: (HasCallStack, MonadIO m) => Rand -> m Double
randDoubleRange :: (HasCallStack, MonadIO m) => Rand -> Double -> Double -> m Double
randFree :: (HasCallStack, MonadIO m) => Rand -> m ()
randInt :: (HasCallStack, MonadIO m) => Rand -> m Word32
randIntRange :: (HasCallStack, MonadIO m) => Rand -> Int32 -> Int32 -> m Int32
randSetSeed :: (HasCallStack, MonadIO m) => Rand -> Word32 -> m ()
randSetSeedArray :: (HasCallStack, MonadIO m) => Rand -> Word32 -> Word32 -> m ()

Exported types

newtype Rand Source #

Memory-managed wrapper type.

Constructors

Rand (ManagedPtr Rand)

Instances

WrappedPtr Rand Source #
Instance details Defined in GI.GLib.Structs.Rand Methods wrappedPtrCalloc :: IO (Ptr Rand) # wrappedPtrCopy :: Rand -> IO Rand # wrappedPtrFree :: Maybe (FunPtr (Ptr Rand -> IO ())) #

noRand :: Maybe Rand Source #

A convenience alias for Nothing :: Maybe Rand.

Methods

double

randDouble Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> m Double	Returns: a random number

Returns the next random gdouble from rand_ equally distributed over the range [0..1).

doubleRange

randDoubleRange Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> Double	`begin`: lower closed bound of the interval
-> Double	`end`: upper open bound of the interval
-> m Double	Returns: a random number

Returns the next random gdouble from rand_ equally distributed over the range [begin..end).

free

randFree Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> m ()

Frees the memory allocated for the Rand.

int

randInt Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> m Word32	Returns: a random number

Returns the next random guint32 from rand_ equally distributed over the range [0..2^32-1].

intRange

randIntRange Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> Int32	`begin`: lower closed bound of the interval
-> Int32	`end`: upper open bound of the interval
-> m Int32	Returns: a random number

Returns the next random gint32 from rand_ equally distributed over the range [begin..end-1].

setSeed

randSetSeed Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> Word32	`seed`: a value to reinitialize the random number generator
-> m ()

Sets the seed for the random number generator Rand to seed.

setSeedArray

randSetSeedArray Source #

Arguments

:: (HasCallStack, MonadIO m)
=> Rand	`rand_`: a `Rand`
-> Word32	`seed`: array to initialize with
-> Word32	`seedLength`: length of array
-> m ()

Initializes the random number generator by an array of longs. Array can be of arbitrary size, though only the first 624 values are taken. This function is useful if you have many low entropy seeds, or if you require more then 32 bits of actual entropy for your application.

Since: 2.4