RtlUniform.3w

Langue: en

Version: Jun 2009 (debian - 07/07/09)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

RtlUniform (NTDLL.@)

SYNOPSIS

ULONG RtlUniform
 (
  PULONG seed
 )

DESCRIPTION

Generates an uniform random number.

PARAMS

seed [Out] The seed of the Random function.

RETURNS

It returns a random number uniformly distributed over [0..MAXLONG-1].

NOTES

Generates an uniform random number using D.H. Lehmer's 1948 algorithm. In our case the algorithm is:

  result = (*seed * 0x7fffffed + 0x7fffffc3) % MAXLONG;



  *seed = result;.

DIFFERENCES

The native documentation states that the random number is uniformly distributed over [0..MAXLONG]. In reality the native function and our function return a random number uniformly distributed over [0..MAXLONG-1].

IMPLEMENTATION

Defined in "winternl.h".

Implemented in "dlls/ntdll/rtl.c".

Debug channel "ntdll".