/*
    File        : scrap.c++
    Date        : 19-Sep-02
    Description : Scrap directory manipulation for the PsiFS filer.

    Copyright  1998, 1999, 2000, 2001, 2002 Alexander Thoukydides

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    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. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/

// Include header file for this module
#include "scrap.h"

// Include clib header files
#include <stdio.h>

// Include oslib header files
#include "oslib/osfile.h"
#include "oslib/osfscontrol.h"

// Include project header files
#include "fs.h"

// Directory to contain scrap files
#define SCRAP_DIR "<PsiFSScrap$Dir>"
#define SCRAP_SUBDIR "<PsiFSScrap$Dir>.Filer"
#define SCRAP_PATH "PsiFSScrap:Filer."

/*
    Parameters  : void
    Returns     : const char *  - Pointer to a unique leaf name.
    Description : Generate a unique leaf name.
*/
const char *scrap_unique()
{
    static bits count = ((bits) os_read_monotonic_time()) << 16;
    static fs_leafname leaf;

    // Generate a new leaf name
    sprintf(leaf, "FS%08X", count++);

    // Return a pointer to the name
    return leaf;
}

/*
    Parameters  : name      - Optional leaf name for the file.
    Returns     : string    - The file name.
    Description : Ensure that the scrap directory exists, and generate the
                  name of file within it. If a name is specified then that is
                  used as the leaf name, otherwise a unique name is generated.
*/
string scrap_name(const char *name)
{
    // Ensure that the directories exists
    osfile_create_dir(SCRAP_DIR, 0);
    osfile_create_dir(SCRAP_SUBDIR, 0);

    // Generate a unique leaf name if necessary
    if (!name) name = scrap_unique();

    // Return the result
    return string(SCRAP_PATH) + name;
}
