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authorRichard Purdie <richard@openedhand.com>2005-08-31 10:47:56 +0000
committerRichard Purdie <richard@openedhand.com>2005-08-31 10:47:56 +0000
commitf54da734eb7b69e8e34de505bd89a13479e230e0 (patch)
treef796bea6f5683dfe3d591ca5390d12fd78e59c96 /bitbake/lib/bb/utils.py
parent4b46c1f6e891b1ddd5968536440b888661fade3e (diff)
downloadpoky-f54da734eb7b69e8e34de505bd89a13479e230e0.tar.gz
Initial population
git-svn-id: https://svn.o-hand.com/repos/poky@2 311d38ba-8fff-0310-9ca6-ca027cbcb966
Diffstat (limited to 'bitbake/lib/bb/utils.py')
-rw-r--r--bitbake/lib/bb/utils.py71
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diff --git a/bitbake/lib/bb/utils.py b/bitbake/lib/bb/utils.py
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1# ex:ts=4:sw=4:sts=4:et
2# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
3"""
4BitBake Utility Functions
5
6This program is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free Software
8Foundation; either version 2 of the License, or (at your option) any later
9version.
10
11This program is distributed in the hope that it will be useful, but WITHOUT
12ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License along with
16this program; if not, write to the Free Software Foundation, Inc., 59 Temple
17Place, Suite 330, Boston, MA 02111-1307 USA.
18
19This file is part of the BitBake build tools.
20"""
21
22digits = "0123456789"
23ascii_letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
24
25import re
26
27def explode_version(s):
28 r = []
29 alpha_regexp = re.compile('^([a-zA-Z]+)(.*)$')
30 numeric_regexp = re.compile('^(\d+)(.*)$')
31 while (s != ''):
32 if s[0] in digits:
33 m = numeric_regexp.match(s)
34 r.append(int(m.group(1)))
35 s = m.group(2)
36 continue
37 if s[0] in ascii_letters:
38 m = alpha_regexp.match(s)
39 r.append(m.group(1))
40 s = m.group(2)
41 continue
42 s = s[1:]
43 return r
44
45def vercmp_part(a, b):
46 va = explode_version(a)
47 vb = explode_version(b)
48 while True:
49 if va == []:
50 ca = None
51 else:
52 ca = va.pop(0)
53 if vb == []:
54 cb = None
55 else:
56 cb = vb.pop(0)
57 if ca == None and cb == None:
58 return 0
59 if ca > cb:
60 return 1
61 if ca < cb:
62 return -1
63
64def vercmp(ta, tb):
65 (va, ra) = ta
66 (vb, rb) = tb
67
68 r = vercmp_part(va, vb)
69 if (r == 0):
70 r = vercmp_part(ra, rb)
71 return r