{
    $Id$
    This file is part of the Free Pascal run time library.
    Copyright (c) 1999-2000 by the Free Pascal development team

    Disk functions from Delphi's sysutils.pas

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 **********************************************************************}

   function GetDiskFreeSpace(drive:pchar;var sector_cluster,bytes_sector,
                             freeclusters,totalclusters:longint):longbool;
     external 'kernel32' name 'GetDiskFreeSpaceA';
type
   TGetDiskFreeSpaceEx = function(drive:pchar;var availableforcaller,
                             total,free):longbool;stdcall;

var
   GetDiskFreeSpaceEx : TGetDiskFreeSpaceEx;

function diskfree(drive : byte) : int64;
var
  disk : array[1..4] of char;
  secs,bytes,
  free,total : longint;
  qwtotal,qwfree,qwcaller : int64;


begin
  if drive=0 then
   begin
     disk[1]:='\';
     disk[2]:=#0;
   end
  else
   begin
     disk[1]:=chr(drive+64);
     disk[2]:=':';
     disk[3]:='\';
     disk[4]:=#0;
   end;
  if assigned(GetDiskFreeSpaceEx) then
    begin
       if GetDiskFreeSpaceEx(@disk,qwcaller,qwtotal,qwfree) then
         diskfree:=qwfree
       else
         diskfree:=-1;
    end
  else
    begin
       if GetDiskFreeSpace(@disk,secs,bytes,free,total) then
         diskfree:=int64(free)*secs*bytes
       else
         diskfree:=-1;
    end;
end;


function disksize(drive : byte) : int64;
var
  disk : array[1..4] of char;
  secs,bytes,
  free,total : longint;
  qwtotal,qwfree,qwcaller : int64;

begin
  if drive=0 then
   begin
     disk[1]:='\';
     disk[2]:=#0;
   end
  else
   begin
     disk[1]:=chr(drive+64);
     disk[2]:=':';
     disk[3]:='\';
     disk[4]:=#0;
   end;
  if assigned(GetDiskFreeSpaceEx) then
    begin
       if GetDiskFreeSpaceEx(@disk,qwcaller,qwtotal,qwfree) then
         disksize:=qwtotal
       else
         disksize:=-1;
    end
  else
    begin
       if GetDiskFreeSpace(@disk,secs,bytes,free,total) then
         disksize:=int64(total)*secs*bytes
       else
         disksize:=-1;
    end;
end;


Function GetCurrentDir : String;
begin
  GetDir(0, result);
end;


Function SetCurrentDir (Const NewDir : String) : Boolean;
begin
  {$I-}
  ChDir(NewDir);
  result := (IOResult = 0);
  {$I+}
end;


Function CreateDir (Const NewDir : String) : Boolean;
begin
  {$I-}
  MkDir(NewDir);
  result := (IOResult = 0);
  {$I+}
end;


Function RemoveDir (Const Dir : String) : Boolean;
begin
  {$I-}
  RmDir(Dir);
  result := (IOResult = 0);
  {$I+}
end;

{
  $Log$
  Revision 1.5  2000-05-15 19:28:41  peter
    * int64 support for diskfree,disksize

  Revision 1.4  2000/02/09 16:59:34  peter
    * truncated log

  Revision 1.3  2000/01/07 16:41:52  daniel
    * copyright 2000

}