Re: Jak zrobić test za pomocą PractRand?

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#217546

From: M.M.
Date: Tue, 24 Aug 2021 09:46

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On Tuesday, August 24, 2021 at 1:43:54 AM UTC+2, osobli...@gmail.com wrote:
> To też nie działa: 
> 
> def to_bytes(num, size): 
> x = num if num >= 0 else 256**size + num
> h = hex(x)[2:].rstrip("L")
> return binascii.unhexlify("0"*((2*size)-len(h))+h) 
> 
> Wyniki, które otrzymuję są podobne do tego, który podano w przykładzie: 
> 
> \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' 
> 
> Oznacza, to, że prawie na pewno konwertuję dane dobrze. Problem jest nadal z przekazaniem tego do PractRand. Nie wiem, czy używam poprawnie: 
> 
> sys.stdout.buffer.write(binary) 
> 
> Skoro nie działa, ale z tego co widzę może tam być po prostu zmienna w nawiasach, więc nie powinno być problemu. Standardowy print zarówno ze znakami nowej linii, jak i bez nie działa. Nie sądzę, że tutaj też jest nadal jakiś błąd. Wydaje mi się, że dane są wciąż źle podawane. 
> 
> Jak podaje dane program: 
> 
> #include <cstdio> 
> #include <cstdint> 
> 
> #include <random> 
> 
> int main() 
> { 
> freopen(NULL, "wb", stdout); // Only necessary on Windows, but harmless. 
> 
> std::mt19937 rng(42); 
> 
> while (1) { 
> uint32_t value = rng(); 
> fwrite((void*) &value, sizeof(value), 1, stdout); 
> } 
> } 
> 
> https://www.pcg-random.org/posts/how-to-test-with-practrand.html 
> 
> I czym to się różni od mojego sposobu?

Nie wiem, ale u mnie działa:

cat test.py
import sys
import struct

class SimpPRNG:
  x = 0
  A = 79908886691
  B = 8143076871913

  def __init__( self, seed ):
    self.x = seed
    for i in range(1,100):
      self.g()

  def g(self):
    self.x = (self.x * self.A + self.B) & (2**128-1)
    return self.x >> 123

r = SimpPRNG( 1 )
buf = 0
s   = 0
while True:
  t = r.g()
  for i in range(1,5):
    buf = buf << 1
    buf = buf | (t & 1)
    t = t >> 1
    s = s + 1
    if s == 32:
      sys.stdout.write( struct.pack('I', buf) )
      s = 0
      buf = 0
  

python test.py | ../c/PractRand/RNG_test stdin
RNG_test using PractRand version 0.94
RNG = RNG_stdin, seed = unknown
test set = core, folding = standard(unknown format)

rng=RNG_stdin, seed=unknown
length= 512 kilobytes (2^19 bytes), time= 2.7 seconds
  no anomalies in 84 test result(s)

rng=RNG_stdin, seed=unknown
length= 1 megabyte (2^20 bytes), time= 5.8 seconds
  no anomalies in 94 test result(s)

rng=RNG_stdin, seed=unknown
length= 2 megabytes (2^21 bytes), time= 11.5 seconds
  no anomalies in 109 test result(s)

rng=RNG_stdin, seed=unknown
length= 4 megabytes (2^22 bytes), time= 22.7 seconds
  no anomalies in 124 test result(s)

rng=RNG_stdin, seed=unknown
length= 8 megabytes (2^23 bytes), time= 44.5 seconds
  no anomalies in 135 test result(s)

rng=RNG_stdin, seed=unknown
length= 16 megabytes (2^24 bytes), time= 87.8 seconds
  no anomalies in 151 test result(s)

^CTraceback (most recent call last):
  File "test.py", line 30, in <module>
    t = t >> 1
KeyboardInterrupt

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Subject: Re: Jak zrobić test za pomocą
 PractRand?
From: "M.M." <mmarszik@gmail.com>
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