cstool/vfsdirchange.h Source File (Crystal Space 2.0 Public API Reference)

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cstool/vfsdirchange.h
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    00001 /*
    00002     Copyright (C) 2005 by Jorrit Tyberghein
    00003               (C) 2005 by Frank Richter
    00004
    00005     This library is free software; you can redistribute it and/or
    00006     modify it under the terms of the GNU Library General Public
    00007     License as published by the Free Software Foundation; either
    00008     version 2 of the License, or (at your option) any later version.
    00009
    00010     This library is distributed in the hope that it will be useful,
    00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00013     Library General Public License for more details.
    00014
    00015     You should have received a copy of the GNU Library General Public
    00016     License along with this library; if not, write to the Free
    00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00018 */
    00019
    00024 #include "iutil/vfs.h"
    00025 #include "csutil/csstring.h"
    00026
    00031 class csVfsDirectoryChanger
    00032 {
    00033   csRef<iVFS> vfs;
    00038   uint popCount;
    00039 public:
    00041   csVfsDirectoryChanger (iVFS* vfs) : vfs(vfs), popCount(0) { }
    00043   ~csVfsDirectoryChanger()
    00044   {
    00045     while (popCount--) vfs->PopDir();
    00046   }
    00053   bool ChangeTo (const char* filename)
    00054   {
    00055     if (!vfs) return false;
    00056
    00057     csString dir(filename);
    00058     dir.Truncate(dir.FindLast('/'));
    00059     vfs->PushDir ();
    00060     popCount++;
    00061
    00062     return vfs->ChDir (dir);
    00063   }
    00064
    00069   bool ChangeToFull (const char* filename)
    00070   {
    00071     if (!vfs) return false;
    00072
    00073     // We must make a copy of the filename because it can be a direct
    00074     // pointer to vfs->GetCwd() and vfs->PushDir() corrupts that pointer.
    00075     csString copy (filename);
    00076
    00077     vfs->PushDir ();
    00078     popCount++;
    00079
    00080     return vfs->ChDir (copy);
    00081   }
    00082
    00089   void PushDir ()
    00090   {
    00091     vfs->PushDir ();
    00092     popCount++;
    00093   }
    00094 };