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# $Id$
#
# Copyright (C) 1997 Klee Dienes <klee@mit.edu>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import string, regex, regex_syntax, types
def parse_version (v):
regex.set_syntax (regex_syntax.RE_SYNTAX_EMACS)
ereg = regex.compile ('^[0-9]+$')
ureg = regex.compile ('^[-:.+A-Za-z0-9]+$')
dreg = regex.compile ('^[.+A-Za-z0-9]+$')
s = v
r = string.find (s, ':')
if (r >= 0):
epoch = s[0:r]
if (ereg.match (epoch) < 0):
raise ValueError, 'epoch ("%s") has invalid format for version string "%s"' % (epoch, v)
s = s[r+1:]
else:
epoch = None
r = string.rfind (s, '-')
if (r > 0):
debian = s[r+1:]
if (dreg.match (debian) < 0):
raise ValueError, 'debian-revision ("%s") has invalid format for version string "%s"' % (debian, v)
s = s[:r]
else:
debian = None
upstream = s[0:]
if (ureg.match (upstream) < 0):
raise ValueError, 'upstream-version ("%s") has invalid format for version string "%s"' % (upstream, v)
return (epoch, upstream, debian)
def _strip_nondigit (s):
regex.set_syntax (regex_syntax.RE_SYNTAX_EMACS)
dstr = regex.compile ('^\\([^0-9]*\\)\\(.*\\)$')
if (dstr.match (s) < 0):
raise ValueError, 'internal error'
prefix = s[dstr.regs[1][0]:dstr.regs[1][1]]
rest = s[dstr.regs[2][0]:dstr.regs[2][1]]
return prefix, rest
def _strip_digit (s):
regex.set_syntax (regex_syntax.RE_SYNTAX_EMACS)
dstr = regex.compile ('^\\([0-9]*\\)\\(.*\\)$')
if (dstr.match (s) < 0):
raise ValueError, 'internal error'
prefix = s[dstr.regs[1][0]:dstr.regs[1][1]]
rest = s[dstr.regs[2][0]:dstr.regs[2][1]]
if (prefix == ''): prefix = '0'
return string.atol (prefix), rest
def _compare_nondigit (s1, s2):
for i in (xrange (max (len (s1), len (s2)))):
if (i >= len (s1)): return -1
if (i >= len (s2)): return 1
if ((s1[i] in string.letters) and (s2[i] not in string.letters)): return -1
if ((s2[i] in string.letters) and (s1[i] not in string.letters)): return 1
if (s1[i] < s2[i]): return -1
if (s2[i] < s1[i]): return 1
return 0
def compare_subversion (v1, v2):
nv1 = v1
nv2 = v2
while 1:
# print 'nondigit: nv1: "%s", nv2: "%s"' % (nv1, nv2)
sv1, nv1 = _strip_nondigit (nv1)
sv2, nv2 = _strip_nondigit (nv2)
# print 'nondigit: sv1: "%s", sv2: "%s"' % (sv1, sv2)
r = _compare_nondigit (sv1, sv2)
if (r != 0):
return r
if ((nv1 == '') and (nv2 == '')):
return 0
# print 'digit: nv1: "%s", nv2: "%s"' % (nv1, nv2)
sv1, nv1 = _strip_digit (nv1)
sv2, nv2 = _strip_digit (nv2)
# print 'digit: sv1: "%s", sv2: "%s"' % (sv1, sv2)
if (sv1 < sv2):
return -1
if (sv1 > sv2):
return 1
if ((nv1 == '') and (nv2 == '')):
return 0
def compare_versions (v1, v2):
e1, u1, d1 = parse_version (v1)
e2, u2, d2 = parse_version (v2)
if (e1 == None): e1 = ''
if (d1 == None): d1 = ''
if (e2 == None): e2 = ''
if (d2 == None): d2 = ''
r = compare_subversion (e1, e2)
if (r != 0): return r
r = compare_subversion (u1, u2)
if (r != 0): return r
r = compare_subversion (d1, d2)
if (r != 0): return r
return 0
def check_version (v1, constraint, v2):
regex.set_syntax (regex_syntax.RE_SYNTAX_EMACS)
eqreg = regex.compile ('^=\\|<=\\|>=\\|<\\|>$')
ltreg = regex.compile ('^<=\\|<<\\|<$')
gtreg = regex.compile ('^>=\\|>>\\|>$')
r = compare_versions (v1, v2)
if (r == 0):
return (eqreg.match (constraint) > 0)
elif (r > 0):
return (gtreg.match (constraint) > 0)
else: # (r < 0):
return (ltreg.match (constraint) > 0)
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