languages/cpython
languages/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2024-10-14 17:40:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

bpo-32713: Fix tarfile.itn for large/negative float values. (GH-5434)

Browse source
This commit is contained in:
Joffrey F 2018-02-26 16:02:21 -08:00 committed by Serhiy Storchaka
parent eee72d4778
commit 72d9b2be36
3 changed files with 11 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
Lib/tarfile.py
View file

@ -200,8 +200,9 @@ def itn(n, digits=8, format=DEFAULT_FORMAT):
# base-256 representation. This allows values up to (256**(digits-1))-1.
# A 0o200 byte indicates a positive number, a 0o377 byte a negative
# number.
n = int(n)
if 0 <= n < 8 ** (digits - 1):
s = bytes("%0*o" % (digits - 1, int(n)), "ascii") + NUL
s = bytes("%0*o" % (digits - 1, n), "ascii") + NUL
elif format == GNU_FORMAT and -256 ** (digits - 1) <= n < 256 ** (digits - 1):
if n >= 0:
s = bytearray([0o200])

8
Lib/test/test_tarfile.py
View file

@ -2149,6 +2149,14 @@ def test_write_number_fields(self):
self.assertEqual(tarfile.itn(-0x100000000000000),
b"\xff\x00\x00\x00\x00\x00\x00\x00")
# Issue 32713: Test if itn() supports float values outside the
# non-GNU format range
self.assertEqual(tarfile.itn(-100.0, format=tarfile.GNU_FORMAT),
b"\xff\xff\xff\xff\xff\xff\xff\x9c")
self.assertEqual(tarfile.itn(8 ** 12 + 0.0, format=tarfile.GNU_FORMAT),
b"\x80\x00\x00\x10\x00\x00\x00\x00")
self.assertEqual(tarfile.nti(tarfile.itn(-0.1, format=tarfile.GNU_FORMAT)), 0)
def test_number_field_limits(self):
with self.assertRaises(ValueError):
tarfile.itn(-1, 8, tarfile.USTAR_FORMAT)

1
Misc/NEWS.d/next/Library/2018-02-26-13-16-36.bpo-32713.55yegW.rst Normal file
View file

@ -0,0 +1 @@
Fixed tarfile.itn handling of out-of-bounds float values. Patch by Joffrey Fuhrer.