---
name: "RtlUniform"
section: "3w"
platform: "linux"
package: "libwine-dev"
version: "1.4.1-4"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/RtlUniform"
---

# RtlUniform(3w)

## 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"**.