[fpc-pascal]directory tree in memory

Michael Van Canneyt michael.vancanneyt at wisa.be
Mon Oct 15 09:33:52 CEST 2001

On Mon, 15 Oct 2001, Ivan Montes wrote:

> Hi,
> Maybe it's a bit off-topic, sorry for any incovenience.
> In my library I need to have a repressentation of a directorty tree in memory, to search for files etc.
> I'm using a tList like this :
> pMyDirsItem = ^mydirsitem;
> myDirsItem =RECORD
>   info :tFileInfo; //name, size, time/date ...
>   sub :tList;
> end;
> myDirs :tList;
> What I do is store the file/directory name and the like in DirsItem.info and if it's a directory "sub" points to another tList with the contents of that directory.
> It works but I would like to know if someone have a better solution for this problem. I'm not very happy with the performance when I have to find a file in it.

Use a TStringList object instead of a Tlist.
Store the name in the string, and in the Object, store

  Into : TFileInfo;
  Sub : TStringList;

If the stringlist object is sorted (Sorted:=True) then any search will use a binary search,
thus speeding up the search quite a lot.


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