[Lazarus] CreateRelativePath document error.

[Michael Van Canneyt]

On Tue, 9 Feb 2010, Paul van Helden wrote:

>
> On 2010/02/09 03:20 PM, Michael Van Canneyt wrote:
>>> I'm talking specifically about /relative/ paths, ie. ones with ../../../ 
>>> in them.
>>> 
>>> On 2010/02/09 02:02 PM, Graeme Geldenhuys wrote:
>>>>   - ExpandFileName()
>>>>   - ExpandUNCFileName()
>>>>   - ExpandFileNameUTF8()
>>>>   - CleanAndExpandFilename()
>>>>   - ExpandUNCFileNameUTF8()
>>>>   - CleanAndExpandDirectory()
>>>> 
>>>> 
>>> Graeme: you also missed this. None of those functions take a base path and 
>>> applies a relative path to produce a new absolute path. The function must 
>>> be able to go up some directories and then down some others.
>> 
>> 
>> ExpandFileName does exactly that.
>> 
>> 
> No it doesn't, unless you're assuming your current directory as the base 
> path. ExtractRelativePath specifically takes a base path as a parameter. Its 
> inverse should do the same. In a GUI app (at least mine) I don't care about 
> my current directory.

Yes it does ?

ExpandFileName(BasePath+RelativePath);

Will get rid of all '..' pairs and do what you need. Obviously, BasePath
must be an absolute pathname; But the same holds for ExtractRelativePath.

Michael.