diff options
Diffstat (limited to 'Lib/_pydecimal.py')
| -rw-r--r-- | Lib/_pydecimal.py | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/Lib/_pydecimal.py b/Lib/_pydecimal.py index de4561a..613123e 100644 --- a/Lib/_pydecimal.py +++ b/Lib/_pydecimal.py @@ -2131,10 +2131,16 @@ class Decimal(object): else: return None - if xc >= 10**p: + # An exact power of 10 is representable, but can convert to a + # string of any length. But an exact power of 10 shouldn't be + # possible at this point. + assert xc > 1, self + assert xc % 10 != 0, self + strxc = str(xc) + if len(strxc) > p: return None xe = -e-xe - return _dec_from_triple(0, str(xc), xe) + return _dec_from_triple(0, strxc, xe) # now y is positive; find m and n such that y = m/n if ye >= 0: @@ -2184,13 +2190,18 @@ class Decimal(object): return None xc = xc**m xe *= m - if xc > 10**p: + # An exact power of 10 is representable, but can convert to a string + # of any length. But an exact power of 10 shouldn't be possible at + # this point. + assert xc > 1, self + assert xc % 10 != 0, self + str_xc = str(xc) + if len(str_xc) > p: return None # by this point the result *is* exactly representable # adjust the exponent to get as close as possible to the ideal # exponent, if necessary - str_xc = str(xc) if other._isinteger() and other._sign == 0: ideal_exponent = self._exp*int(other) zeros = min(xe-ideal_exponent, p-len(str_xc)) |