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Encapsulated the ackermann_naive generator, updated revision dates

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AdrienCos 2019-06-04 11:40:50 -04:00
parent 8f8cd483fd
commit 3f350c3569
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2 changed files with 16 additions and 5 deletions
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2
bin/stegano-lsb-set
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@ -22,7 +22,7 @@
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.7 $"
__date__ = "$Date: 2016/03/18 $"
__revision__ = "$Date: 2017/05/16 $"
__revision__ = "$Date: 2019/06/04 $"
__license__ = "GPLv3"
import inspect

19
stegano/lsbset/generators.py
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@ -22,7 +22,7 @@
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.3 $"
__date__ = "$Date: 2011/12/28 $"
__revision__ = "$Date: 2017/03/10 $"
__revision__ = "$Date: 2019/06/04 $"
__license__ = "GPLv3"
import itertools
@ -107,15 +107,24 @@ def carmichael() -> Iterator[int]:
yield m
def ackermann_naive(m: int, n: int) -> int:
def ackermann_slow(m: int, n: int) -> int:
"""Ackermann number.
"""
if m == 0:
return n + 1
elif n == 0:
return ackermann_naive(m - 1, 1)
return ackermann_slow(m - 1, 1)
else:
return ackermann_naive(m - 1, ackermann_naive(m, n - 1))
return ackermann_slow(m - 1, ackermann_slow(m, n - 1))
def ackermann_naive(m: int) -> Iterator[int]:
"""Naive Ackermann encapsulated in a generator
"""
n = 0
while True:
yield ackermann_slow(m, n)
n += 1
def ackermann_fast(m: int, n: int) -> int:
@ -136,6 +145,7 @@ def ackermann_fast(m: int, n: int) -> int:
else:
return n + 1
def ackermann(m: int) -> Iterator[int]:
"""Ackermann encapsulated in a generator.
"""
@ -144,6 +154,7 @@ def ackermann(m: int) -> Iterator[int]:
yield ackermann_fast(m, n)
n += 1
def fibonacci() -> Iterator[int]:
"""Generate the sequence of Fibonacci.
https://oeis.org/A000045