Server : Apache System : Linux indy02.toastserver.com 3.10.0-962.3.2.lve1.5.85.el7.x86_64 #1 SMP Thu Apr 18 15:18:36 UTC 2024 x86_64 User : palandch ( 1163) PHP Version : 7.1.33 Disable Function : NONE Directory :  /opt/cloudlinux/venv/lib/python3.11/site-packages/numpy/random/_examples/cffi/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

"""
Use cffi to access any of the underlying C functions from distributions.h
"""
import os
import numpy as np
import cffi
from .parse import parse_distributions_h
ffi = cffi.FFI()

inc_dir = os.path.join(np.get_include(), 'numpy')

# Basic numpy types
ffi.cdef('''
    typedef intptr_t npy_intp;
    typedef unsigned char npy_bool;

''')

parse_distributions_h(ffi, inc_dir)

lib = ffi.dlopen(np.random._generator.__file__)

# Compare the distributions.h random_standard_normal_fill to
# Generator.standard_random
bit_gen = np.random.PCG64()
rng = np.random.Generator(bit_gen)
state = bit_gen.state

interface = rng.bit_generator.cffi
n = 100
vals_cffi = ffi.new('double[%d]' % n)
lib.random_standard_normal_fill(interface.bit_generator, n, vals_cffi)

# reset the state
bit_gen.state = state

vals = rng.standard_normal(n)

for i in range(n):
    assert vals[i] == vals_cffi[i]