The Tor Browser: addon-sdk/source/python-lib/cuddlefish/version

addon-sdk/source/python-lib/cuddlefish/version_comparator.py@6474c204b198 (annotated)

addon-sdk/source/python-lib/cuddlefish/version_comparator.py

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 '''
     This is a really crummy, slow Python implementation of the Mozilla
     platform's nsIVersionComparator interface:
       https://developer.mozilla.org/En/NsIVersionComparator
     For more information, also see:
       http://mxr.mozilla.org/mozilla/source/xpcom/glue/nsVersionComparator.cpp
 '''
 import re
 import sys
 class VersionPart(object):
     '''
     Examples:
       >>> VersionPart('1')
       (1, None, 0, None)
       >>> VersionPart('1pre')
       (1, 'pre', 0, None)
       >>> VersionPart('1pre10')
       (1, 'pre', 10, None)
       >>> VersionPart('1pre10a')
       (1, 'pre', 10, 'a')
       >>> VersionPart('1+')
       (2, 'pre', 0, None)
       >>> VersionPart('*').numA == sys.maxint
       True
       >>> VersionPart('1') < VersionPart('2')
       True
       >>> VersionPart('2') > VersionPart('1')
       True
       >>> VersionPart('1') == VersionPart('1')
       True
       >>> VersionPart('1pre') > VersionPart('1')
       False
       >>> VersionPart('1') < VersionPart('1pre')
       False
       >>> VersionPart('1pre1') < VersionPart('1pre2')
       True
       >>> VersionPart('1pre10b') > VersionPart('1pre10a')
       True
       >>> VersionPart('1pre10b') == VersionPart('1pre10b')
       True
       >>> VersionPart('1pre10a') < VersionPart('1pre10b')
       True
       >>> VersionPart('1') > VersionPart('')
       True
     '''
     _int_part = re.compile('[+-]?(\d*)(.*)')
     _num_chars = '0123456789+-'
     def __init__(self, part):
         self.numA = 0
         self.strB = None
         self.numC = 0
         self.extraD = None
         if not part:
             return
         if part == '*':
             self.numA = sys.maxint
         else:
             match = self._int_part.match(part)
             self.numA = int(match.group(1))
             self.strB = match.group(2) or None
         if self.strB == '+':
             self.strB = 'pre'
             self.numA += 1
         elif self.strB:
             i = 0
             num_found = -1
             for char in self.strB:
                 if char in self._num_chars:
                     num_found = i
                     break
                 i += 1
             if num_found != -1:
                 match = self._int_part.match(self.strB[num_found:])
                 self.numC = int(match.group(1))
                 self.extraD = match.group(2) or None
                 self.strB = self.strB[:num_found]
     def _strcmp(self, str1, str2):
         # Any string is *before* no string.
         if str1 is None:
             if str2 is None:
                 return 0
             else:
                 return 1
         if str2 is None:
             return -1
         return cmp(str1, str2)
     def __cmp__(self, other):
         r = cmp(self.numA, other.numA)
         if r:
             return r
         r = self._strcmp(self.strB, other.strB)
         if r:
             return r
         r = cmp(self.numC, other.numC)
         if r:
             return r
         return self._strcmp(self.extraD, other.extraD)
     def __repr__(self):
         return repr((self.numA, self.strB, self.numC, self.extraD))
 def compare(a, b):
     '''
     Examples:
       >>> compare('1', '2')
       -1
       >>> compare('1', '1')
 
       >>> compare('2', '1')
 
       >>> compare('1.0pre1', '1.0pre2')
       -1
       >>> compare('1.0pre2', '1.0')
       -1
       >>> compare('1.0', '1.0.0')
 
       >>> compare('1.0.0', '1.0.0.0')
 
       >>> compare('1.0.0.0', '1.1pre')
       -1
       >>> compare('1.1pre', '1.1pre0')
 
       >>> compare('1.1pre0', '1.0+')
 
       >>> compare('1.0+', '1.1pre1a')
       -1
       >>> compare('1.1pre1a', '1.1pre1')
       -1
       >>> compare('1.1pre1', '1.1pre10a')
       -1
       >>> compare('1.1pre10a', '1.1pre10')
       -1
       >>> compare('1.1pre10a', '1.*')
       -1
     '''
     a_parts = a.split('.')
     b_parts = b.split('.')
     if len(a_parts) < len(b_parts):
         a_parts.extend([''] * (len(b_parts) - len(a_parts)))
     else:
         b_parts.extend([''] * (len(a_parts) - len(b_parts)))
     for a_part, b_part in zip(a_parts, b_parts):
         r = cmp(VersionPart(a_part), VersionPart(b_part))
         if r:
             return r
     return 0
 if __name__ == '__main__':
     import doctest
     doctest.testmod(verbose=True)

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addon-sdk/source/python-lib/cuddlefish/version_comparator.py@6474c204b198 (annotated)

addon-sdk/source/python-lib/cuddlefish/version_comparator.py