vlc_rand.h File Reference

This file defined random number generator function in vlc. More...

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Functions
VLC_API void	vlc_rand_bytes (void *buf, size_t len)
VLC_API double	vlc_drand48 (void) VLC_USED
	PRNG uniformly distributed between 0.0 and 1.0 with 48-bits precision.
VLC_API long	vlc_lrand48 (void) VLC_USED
	PRNG uniformly distributed between 0 and 2^32 - 1.
VLC_API long	vlc_mrand48 (void) VLC_USED
	PRNG uniformly distributed between -2^32 and 2^32 - 1.

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Detailed Description

This file defined random number generator function in vlc.

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Function Documentation

VLC_API double vlc_drand48

(

void

)

PRNG uniformly distributed between 0.0 and 1.0 with 48-bits precision.

Note:

Contrary to POSIX drand48(), this function is thread-safe.

Warning:

Series generated by this function are not reproducible. Use erand48() if you need reproducible series.

Returns:

a double value within [0.0, 1.0] inclusive

References erand48(), init_rand48(), rand48, vlc_mutex_lock(), and vlc_mutex_unlock().

VLC_API long vlc_lrand48

(

void

)

PRNG uniformly distributed between 0 and 2^32 - 1.

Note:

Contrary to POSIX lrand48(), this function is thread-safe.

Warning:

Series generated by this function are not reproducible. Use nrand48() if you need reproducible series.

Returns:

an integral value within [0.0, 2^32-1] inclusive

References init_rand48(), nrand48(), rand48, vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by ResetCurrentlyPlaying().

VLC_API long vlc_mrand48

(

void

)

PRNG uniformly distributed between -2^32 and 2^32 - 1.

Note:

Contrary to POSIX mrand48(), this function is thread-safe.

Warning:

Series generated by this function are not reproducible. Use jrand48() if you need reproducible series.

Returns:

an integral value within [-2^32, 2^32-1] inclusive

References init_rand48(), jrand48(), rand48, vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by httpd_StreamCallBack(), input_item_add_subitem_tree(), and playlist_ItemArraySort().

VLC_API void vlc_rand_bytes	(	void *	buf,
		size_t	len
	)

References AddMD5(), md5_s::buf, count, EndMD5(), ikey, InitMD5(), lock, NTPtime64(), okey, and vlc_rand_init().

Referenced by GenerateCnonce(), init_rand48(), and vlc_mkstemp().