getPrefixLength returns null if filename has leading slashes
------------------------------------------------------------
Key: IO-299
URL: https://issues.apache.org/jira/browse/IO-299
Project: Commons IO
Issue Type: Bug
Components: Utilities
Affects Versions: 2.1, 2.0.1
Reporter: Rick Latrine
Situation:
FilenameUtils.getPrefixLength is used in FilenameUtils.doNormalize.
FilenameUtils.normalize("////I don't want to become null!") returns null.
Problem:
Expected was: "I don't want to become null!"
The method FilenameUtils.getPrefixLength returns -1 for the mentioned string.
The root problem is found in following lines of code:
{code:title=FilenameUtils.getPrefixLength}
...
int posUnix = filename.indexOf(UNIX_SEPARATOR, 2);
int posWin = filename.indexOf(WINDOWS_SEPARATOR, 2);
if ((posUnix == -1 && posWin == -1) || posUnix == 2 || posWin
== 2) {
return -1;
}
...
{code}
Solution:
All leading slashes should be ignored at all, but considering the rest of the
string.
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