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import re
from django.utils.encoding import smart_str
MAXVERSION = 2 ** 63 - 1
version_re = re.compile(r"""(?P<major>\d+|\*) # major (x in x.y)
\.?(?P<minor1>\d+|\*)? # minor1 (y in x.y)
\.?(?P<minor2>\d+|\*)? # minor2 (z in x.y.z)
\.?(?P<minor3>\d+|\*)? # minor3 (w in x.y.z.w)
(?P<alpha>[a|b]?) # alpha/beta
(?P<alpha_ver>\d*) # alpha/beta version
(?P<pre>pre)? # pre release
(?P<pre_ver>\d)? # pre release version
""",
re.VERBOSE)
def dict_from_int(version_int):
"""Converts a version integer into a dictionary with major/minor/...
info."""
d = {}
rem = version_int
(rem, d['pre_ver']) = divmod(rem, 100)
(rem, d['pre']) = divmod(rem, 10)
(rem, d['alpha_ver']) = divmod(rem, 100)
(rem, d['alpha']) = divmod(rem, 10)
(rem, d['minor3']) = divmod(rem, 100)
(rem, d['minor2']) = divmod(rem, 100)
(rem, d['minor1']) = divmod(rem, 100)
(rem, d['major']) = divmod(rem, 100)
d['pre'] = None if d['pre'] else 'pre'
d['alpha'] = {0: 'a', 1: 'b'}.get(d['alpha'])
return d
def num(vint):
return '{major}.{minor1}.{minor2}.{minor3}'.format(**dict_from_int(vint))
def version_dict(version):
"""Turn a version string into a dict with major/minor/... info."""
match = version_re.match(version or '')
letters = 'alpha pre'.split()
numbers = 'major minor1 minor2 minor3 alpha_ver pre_ver'.split()
if match:
d = match.groupdict()
for letter in letters:
d[letter] = d[letter] if d[letter] else None
for num in numbers:
if d[num] == '*':
d[num] = 99
else:
d[num] = int(d[num]) if d[num] else None
else:
d = dict((k, None) for k in numbers)
d.update((k, None) for k in letters)
return d
def version_int(version):
d = version_dict(smart_str(version))
for key in ['alpha_ver', 'major', 'minor1', 'minor2', 'minor3',
'pre_ver']:
if not d[key]:
d[key] = 0
atrans = {'a': 0, 'b': 1}
d['alpha'] = atrans.get(d['alpha'], 2)
d['pre'] = 0 if d['pre'] else 1
v = "%d%02d%02d%02d%d%02d%d%02d" % (d['major'], d['minor1'],
d['minor2'], d['minor3'], d['alpha'], d['alpha_ver'], d['pre'],
d['pre_ver'])
return min(int(v), MAXVERSION)
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