[jira] [Commented] (IO-299) getPrefixLength returns null if filename has leading slashes

["Thilina Dampahala (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IO-299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13206439#comment-13206439 ] 

Thilina Dampahala commented on IO-299:
--------------------------------------

In this case for your input "////I don't want to become null!", I think the expected output should be
In Unix: "//I don't want to become null!"
In Windows: "\\I don't want to become null!"

Any ideas on this?
                
> 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: 2.0.1, 2.1
>            Reporter: Rick Latrine
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> 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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