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| author | Zac Medico <zmedico@gentoo.org> | 2007-08-15 02:48:46 +0000 |
|---|---|---|
| committer | Zac Medico <zmedico@gentoo.org> | 2007-08-15 02:48:46 +0000 |
| commit | 05654e20b853fc0cbc50ad34f3f394b5ad570c83 (patch) | |
| tree | 196fb3cb93e3fe373575add348aa953bb34bacfb /pym/portage/versions.py | |
| parent | 92cfbd66be130d754c3db19a6ac475ccb9fd3cfb (diff) | |
| download | portage-05654e20b853fc0cbc50ad34f3f394b5ad570c83.tar.gz portage-05654e20b853fc0cbc50ad34f3f394b5ad570c83.tar.bz2 portage-05654e20b853fc0cbc50ad34f3f394b5ad570c83.zip | |
For bug #188449, since python floats have limited range, we multiply both floating point representations by a constant so that they are transformed into whole numbers. This allows the practically infinite range of a python int to be exploited. The multiplication is done by padding both literal strings with zeros as necessary to ensure equal length.
svn path=/main/trunk/; revision=7606
Diffstat (limited to 'pym/portage/versions.py')
| -rw-r--r-- | pym/portage/versions.py | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/pym/portage/versions.py b/pym/portage/versions.py index ebf8cbada..b51b53ae5 100644 --- a/pym/portage/versions.py +++ b/pym/portage/versions.py @@ -98,8 +98,17 @@ def vercmp(ver1, ver2, silent=1): list2.append(int(vlist2[i])) # now we have to use floats so 1.02 compares correctly against 1.1 else: - list1.append(float("0."+vlist1[i])) - list2.append(float("0."+vlist2[i])) + # list1.append(float("0."+vlist1[i])) + # list2.append(float("0."+vlist2[i])) + # Since python floats have limited range, we multiply both + # floating point representations by a constant so that they are + # transformed into whole numbers. This allows the practically + # infinite range of a python int to be exploited. The + # multiplication is done by padding both literal strings with + # zeros as necessary to ensure equal length. + max_len = max(len(vlist1[i]), len(vlist2[i])) + list1.append(int(vlist1[i].ljust(max_len, "0"))) + list2.append(int(vlist2[i].ljust(max_len, "0"))) # and now the final letter if len(match1.group(5)): |