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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2019 Shlomi Fish <shlomif@cpan.org>
#
# Distributed under terms of the Expat license.
import re
from pysol_cards.cards import ms_rearrange
from pysol_cards.random_base import RandomBase
import random as random2
class PysolRandom(RandomBase):
def setSeed(self, seed):
seed = self._convertSeed(seed)
if not 0 <= seed <= self.MAX_SEED:
raise ValueError("seed is out of range")
self.seed = seed
return seed
def _convertSeed(self, seed):
return int(seed)
# /***********************************************************************
# // Linear Congruential random generator
# //
# // Knuth, Donald.E., "The Art of Computer Programming,", Vol 2,
# // Seminumerical Algorithms, Third Edition, Addison-Wesley, 1998,
# // p. 106 (line 26) & p. 108
# ************************************************************************/
class _LCBase(PysolRandom):
def __init__(self, seed=None):
if seed is None:
seed = self._getRandomSeed()
PysolRandom.__init__(self, seed)
self.initial_seed = seed
self.setSeed(seed)
self.origin = self.ORIGIN_UNKNOWN
def reset(self):
self.setSeed(self.initial_seed)
def getSeedAsStr(self):
return self._getSeedStrPrefix() + str(self.seed)
def getSeedStr(self):
return self._getSeedStrPrefix() + str(self.initial_seed)
class LCRandom64(_LCBase):
MAX_SEED = 0xffffffffffffffff # 64 bits
def random(self):
self.seed = (self.seed * 6364136223846793005 + 1) & self.MAX_SEED
return ((self.seed >> 21) & 0x7fffffff) / 2147483648.0
def _getSeedStrPrefix(self):
return "old"
class LCRandom31(_LCBase):
MAX_SEED = ((1 << (31 + 2)) - 1) # 33 bits
def setSeed(self, seed):
if not 1 <= seed <= self.MAX_SEED:
raise ValueError("seed is out of range")
self.seed = seed
self.seedx = seed if (seed < 0x100000000) else (seed - 0x100000000)
return self.seed
def random(self):
if (self.seed < 0x100000000):
ret = self._rand()
return (ret if (self.seed < 0x80000000) else (ret | 0x8000))
else:
return self._randp() + 1
def _randp(self):
self.seedx = ((self.seedx) * 214013 + 2531011) & self.MAX_SEED
return (self.seedx >> 16) & 0xffff
def _rand(self):
self.seedx = ((self.seedx) * 214013 + 2531011) & self.MAX_SEED
return (self.seedx >> 16) & 0x7fff
def randint(self, a, b):
return a + self.random() % (b + 1 - a)
def _getSeedStrPrefix(self):
return "ms"
def increaseSeed(self, seed):
"""docstring for increaseSeed"""
integer_seed = super(LCRandom31, self).increaseSeed(seed)
return "ms{}".format(integer_seed)
def str(self, seed):
if match_ms_deal_prefix(seed) is None:
return "%05d" % int(seed)
return seed
def getstate(self):
return (
self.seed,
self.seedx,
)
def setstate(self, token):
(self.seed, self.seedx,) = token
# * Mersenne Twister random number generator
class MTRandom(RandomBase, random2.Random):
MAX_SEED = 100000000000000000000 # 20 digits
def __init__(self, seed=None):
if seed is None:
seed = self._getRandomSeed()
RandomBase.__init__(self)
random2.Random.__init__(self, seed)
self.initial_seed = seed
self.initial_state = self.getstate()
self.origin = self.ORIGIN_UNKNOWN
def getstate(self):
return (
RandomBase.getstate(self),
random2.Random.getstate(self)
)
def setstate(self, token):
base, r2 = token
RandomBase.setstate(self, base)
random2.Random.setstate(self, r2)
def setSeed(self, seed):
random2.Random.__init__(self, seed)
self.initial_state = self.getstate()
return seed
def reset(self):
self.setSeed(self.initial_seed)
def shuffle(cards, game_num, which_deals):
ms = ((game_num <= 32000) or (which_deals == RandomBase.DEALS_MS))
r = LCRandom31() if ms else MTRandom() if which_deals == \
RandomBase.DEALS_PYSOLFC else LCRandom64()
r.setSeed(game_num)
return r.shuffle(ms_rearrange(cards) if ms else cards)
_ms_pat = re.compile("ms([0-9]+)\\n?\\Z")
def match_ms_deal_prefix(mystring):
ret = re.match(_ms_pat, mystring)
return None if not ret else int(ret.group(1))
MS_LONG_BIT = (1 << 1000)
CUSTOM_BIT = (1 << 999)
def random__str2int(s):
if s == 'Custom':
return CUSTOM_BIT | MS_LONG_BIT
m = match_ms_deal_prefix(s)
if m is not None:
return (m | MS_LONG_BIT)
else:
return int(s)
def random__int2str(myint):
if ((myint & MS_LONG_BIT) != 0):
if ((myint & CUSTOM_BIT) != 0):
return 'Custom'
return "ms" + str(myint & (~ MS_LONG_BIT))
else:
return str(myint)
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