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¶

Declared in "winternl.h". Implemented in "dlls/ntdll/rtl.c". Debug channel "ntdll".