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psp_fs.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2005 The ScummVM project
 * Copyright (C) 2005 Joost Peters PSP Backend
 * Copyright (C) 2005 Thomas Mayer PSP Backend
 * Copyright (C) 2005 Paolo Costabel PSP Backend
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/backends/psp/psp_fs.cpp,v 1.1.2.1 2005/10/18 02:11:17 sev Exp $
 */

#ifdef __PSP__
#include "base/engine.h"

#include "backends/fs/fs.h"
#include <stdio.h>
#include <stdlib.h>

/*
 * Implementation of the ScummVM file system API based on PSPSDK API.
 */

class PSPFilesystemNode : public AbstractFilesystemNode {
protected:
      String _displayName;
      bool _isDirectory;
      bool _isValid;
      bool _isPseudoRoot;
      String _path;
      
public:
      PSPFilesystemNode();
      PSPFilesystemNode(const String &path);
      PSPFilesystemNode(const PSPFilesystemNode *node);

      virtual String displayName() const { return _displayName; }
      virtual bool isValid() const { return _isValid; }
      virtual bool isDirectory() const { return _isDirectory; }
      virtual String path() const { return _path; }

      virtual FSList listDir(ListMode) const;
      virtual AbstractFilesystemNode *parent() const;
};

AbstractFilesystemNode *FilesystemNode::getRoot() {
      return new PSPFilesystemNode();
}

PSPFilesystemNode::PSPFilesystemNode() {
      _isDirectory = true;
      _displayName = "Root";
      _isValid = true;
      _path = "ms0:/";
      _isPseudoRoot = true;
}

PSPFilesystemNode::PSPFilesystemNode(const Common::String &p)
{
      _displayName = p;
      _isValid = true;
      _isDirectory = true;
      _path = p;
}


PSPFilesystemNode::PSPFilesystemNode(const PSPFilesystemNode *node) {
      _displayName = node->_displayName;
      _isDirectory = node->_isDirectory;
      _isValid = node->_isValid;
      _isPseudoRoot = node->_isPseudoRoot;
      _path = node->_path;
}

AbstractFilesystemNode *FilesystemNode::getNodeForPath(const String &path) 
{
      return new PSPFilesystemNode(path);
}


FSList PSPFilesystemNode::listDir(ListMode mode) const {
      assert(_isDirectory);

      int dfd;
      FSList myList;
      
    dfd = sceIoDopen(_path.c_str());
      if (dfd > 0) {
        SceIoDirent dir;         
        memset(&dir, 0, sizeof(dir));
         
        while (sceIoDread(dfd, &dir) > 0) {
            // Skip 'invisible files
            if (dir.d_name[0] == '.') 
                continue;
               
            PSPFilesystemNode entry;
            
            entry._isValid = true;
            entry._isPseudoRoot = false;
            entry._displayName = dir.d_name;
            entry._path = _path;
            entry._path += dir.d_name;
            entry._isDirectory = dir.d_stat.st_attr & FIO_SO_IFDIR;
            if (entry._isDirectory)
                entry._path += "/";
            
            // Honor the chosen mode
            if ((mode == kListFilesOnly && entry._isDirectory) ||
                (mode == kListDirectoriesOnly && !entry._isDirectory))
                    continue;
            
            myList.push_back(wrap(new PSPFilesystemNode(&entry)));
        }
        sceIoDclose(dfd);   
      }

      return myList;
}

const char *lastPathComponent(const Common::String &str) {
      const char *start = str.c_str();
      const char *cur = start + str.size() - 2;

      while (cur > start && *cur != '/') {
            --cur;
      }

      return cur + 1;
}

AbstractFilesystemNode *PSPFilesystemNode::parent() const {
      assert(_isValid || _isPseudoRoot);
      if (_isPseudoRoot)
            return 0;
      PSPFilesystemNode *p = new PSPFilesystemNode();
      if (_path.size() > 5) {
            const char *start = _path.c_str();
            const char *end = lastPathComponent(_path);

            p = new PSPFilesystemNode();
            p->_path = String(start, end - start);
            p->_isValid = true;
            p->_isDirectory = true;
            p->_displayName = lastPathComponent(p->_path);
            p->_isPseudoRoot = false;
      }
      return p;
}

#endif // PSP

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