def randcontext(exprange):
c = Context(C.Context(), P.Context())
c.Emax = random.randrange(1, exprange + 1)
c.Emin = random.randrange(-exprange, 0)
maxprec = 100 if c.Emax >= 100 else c.Emax
c.prec = random.randrange(1, maxprec + 1)
c.clamp = random.randrange(2)
c.clear_traps()
return c
def __init__(self):
self.ulpdiff = 0
self.powmod_zeros = 0
self.maxctx = P.Context(Emax=10**18, Emin=-10**18)
if self.c.flags[signal] == (not self.p.flags[CondMap[signal]]):
return False
return True
# We don't want exceptions so that we can compare the status flags.
context = Context()
context.Emin = C.MIN_EMIN
context.Emax = C.MAX_EMAX
context.clear_traps()
# When creating decimals, _decimal is ultimately limited by the maximum
# context values. We emulate this restriction for decimal.py.
maxcontext = P.Context(prec=C.MAX_PREC,
Emin=C.MIN_EMIN,
Emax=C.MAX_EMAX,
rounding=P.ROUND_HALF_UP,
capitals=1)
maxcontext.clamp = 0
def RestrictedDecimal(value):
maxcontext.traps = copy(context.p.traps)
maxcontext.clear_flags()
if isinstance(value, str):
value = value.strip()
dec = maxcontext.create_decimal(value)
if maxcontext.flags[P.Inexact] or \
maxcontext.flags[P.Rounded] or \
maxcontext.flags[P.Clamped] or \
maxcontext.flags[P.InvalidOperation]: