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ps2-fs.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2005-2006 The ScummVM project
 *
 * 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.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/backends/fs/ps2/ps2-fs.cpp $
 * $Id: ps2-fs.cpp 24185 2006-10-08 00:55:31Z lavosspawn $
 */

#include "backends/fs/abstract-fs.h"
#include "backends/fs/fs.h"
#include <kernel.h>
#include <stdio.h>
#include <stdlib.h>
#include "asyncfio.h"
#include "systemps2.h"

extern AsyncFio fio;
extern OSystem_PS2 *g_systemPs2;

class Ps2FilesystemNode : public AbstractFilesystemNode {
protected:
      String _displayName;
      bool _isDirectory;
      bool _isRoot;
      String _path;

public:
      Ps2FilesystemNode(void);
      Ps2FilesystemNode(const Ps2FilesystemNode *node);
      Ps2FilesystemNode(const String &path);

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

      //virtual FSList listDir(ListMode) const;
      virtual bool listDir(AbstractFSList &list, ListMode mode) const;
      virtual AbstractFilesystemNode *parent() const;
      virtual AbstractFilesystemNode *clone() const { return new Ps2FilesystemNode(this); }
      virtual AbstractFilesystemNode *child(const String &name) const;
};

AbstractFilesystemNode *AbstractFilesystemNode::getCurrentDirectory() {
      return AbstractFilesystemNode::getRoot();
}

AbstractFilesystemNode *AbstractFilesystemNode::getRoot(void) {
      return new Ps2FilesystemNode();
}

AbstractFilesystemNode *AbstractFilesystemNode::getNodeForPath(const String &path) {
      return new Ps2FilesystemNode(path);
}

Ps2FilesystemNode::Ps2FilesystemNode(void) {
      _isDirectory = true;
      _isRoot = true;
      _displayName = "PlayStation 2";
      _path = "";
}

Ps2FilesystemNode::Ps2FilesystemNode(const String &path) {
      _path = path;
      _isDirectory = true;
      if (strcmp(path.c_str(), "") == 0) {
            _isRoot = true;
            _displayName = String("PlayStation 2");
      } else {
            _isRoot = false;
            const char *dsplName = NULL, *pos = path.c_str();
            while (*pos)
                  if (*pos++ == '/')
                        dsplName = pos;
            if (dsplName) {
                  _displayName = String(dsplName);

                  // check if this is a file or directory
                  if (path.lastChar() != '/') {
                        char checkPath[256];
                        sprintf(checkPath, "%s/", path.c_str());
                        int fd = fio.dopen(checkPath);
                        printf("check: %s: %d\n", checkPath, fd);
                        if (fd < 0)
                              _isDirectory = false;
                        else
                              fio.dclose(fd);
                  } // if it ends with /, assume it's not a file
            } else {
                  if (strncmp(path.c_str(), "cdfs", 4) == 0)
                        _displayName = "DVD Drive";
                  else if (strncmp(path.c_str(), "mass", 4) == 0)
                        _displayName = "USB Mass Storage";
                  else if (strncmp(path.c_str(), "pfs0", 4) == 0)
                        _displayName = "Harddisk";
                  else {
                        printf("PS2FSNode ctor: invalid path %s\n", path.c_str());
                        _isDirectory = false;
                  }
            }
      }
}

Ps2FilesystemNode::Ps2FilesystemNode(const Ps2FilesystemNode *node) {
      _displayName = node->_displayName;
      _isDirectory = node->_isDirectory;
      _path = node->_path;
      _isRoot = node->_isRoot;
}

bool Ps2FilesystemNode::listDir(AbstractFSList &list, ListMode mode) const {
      if (!_isDirectory)
            return false;

      if (_isRoot) {
            Ps2FilesystemNode dirEntry;
            dirEntry._isDirectory = true;
            dirEntry._isRoot = false;
            dirEntry._path = "cdfs:";
            dirEntry._displayName = "DVD Drive";
            list.push_back(new Ps2FilesystemNode(&dirEntry));

            if (g_systemPs2->hddPresent()) {
                  dirEntry._path = "pfs0:";
                  dirEntry._displayName = "Harddisk";
                  list.push_back(new Ps2FilesystemNode(&dirEntry));
            }

            if (g_systemPs2->usbMassPresent()) {
                  dirEntry._path = "mass:";
                  dirEntry._displayName = "USB Mass Storage";
                  list.push_back(new Ps2FilesystemNode(&dirEntry));
            }
            return true;
      } else {
            if (strncmp(_path.c_str(), "host:", 5) == 0) {
                  // special case, we can't list the host device.
                  Ps2FilesystemNode dirEntry;
                  dirEntry._isRoot = false;
                  dirEntry._isDirectory = false;
                  char *fakeFiles[4] = { "modern.ini", "modern.zip", "classic.ini", "classic.zip" };
                  for (int i = 0; i < 4; i++) {
                        dirEntry._path = _path + fakeFiles[i];
                        dirEntry._displayName = fakeFiles[i];
                        list.push_back(new Ps2FilesystemNode(&dirEntry));
                  }
                  return true;
            }
            char listDir[256];
            int fd;
            if (_path.lastChar() == '/')
                  fd = fio.dopen(_path.c_str());
            else {
                  sprintf(listDir, "%s/", _path.c_str());
                  fd = fio.dopen(listDir);
            }
            
            if (fd >= 0) {
                  iox_dirent_t dirent;
                  Ps2FilesystemNode dirEntry;
                  int dreadRes;
                  while ((dreadRes = fio.dread(fd, &dirent)) > 0) {
                        if (dirent.name[0] == '.')
                              continue; // ignore '.' and '..'
                        if (((mode == FilesystemNode::kListDirectoriesOnly) && (dirent.stat.mode & FIO_S_IFDIR)) ||
                              ((mode == FilesystemNode::kListFilesOnly) && !(dirent.stat.mode & FIO_S_IFDIR)) ||
                              (mode == FilesystemNode::kListAll)) {

                              dirEntry._isDirectory = (bool)(dirent.stat.mode & FIO_S_IFDIR);
                              dirEntry._isRoot = false;

                              dirEntry._path = _path;
                              if (_path.lastChar() != '/')
                                    dirEntry._path += "/";
                              dirEntry._path += dirent.name;

                              dirEntry._displayName = dirent.name;

                              list.push_back(new Ps2FilesystemNode(&dirEntry));
                        }
                  }
                  fio.dclose(fd);
                  return true;
            } else
                  return false;
      }
}

AbstractFilesystemNode *Ps2FilesystemNode::parent() const {
      if (_isRoot)
            return new Ps2FilesystemNode(this);

      const char *slash = NULL;
      const char *cnt = _path.c_str();

      while (*cnt) {
            if (*cnt == '/')
                  slash = cnt;
            cnt++;
      }

      if (slash)
            return new Ps2FilesystemNode(String(_path.c_str(), slash - _path.c_str()));
      else
            return new Ps2FilesystemNode();
}

AbstractFilesystemNode *Ps2FilesystemNode::child(const String &name) const {
      if (!_isDirectory)
            return NULL;

      char listDir[256];
      sprintf(listDir, "%s/", _path.c_str());
      int fd = fio.dopen(listDir);
      
      if (fd >= 0) {
            iox_dirent_t dirent;

            while (fio.dread(fd, &dirent) > 0) {
                  if (strcmp(name.c_str(), dirent.name) == 0) {
                        Ps2FilesystemNode *dirEntry = new Ps2FilesystemNode();

                        dirEntry->_isDirectory = (bool)(dirent.stat.mode & FIO_S_IFDIR);
                        dirEntry->_isRoot = false;

                        dirEntry->_path = _path;
                        dirEntry->_path += "/";
                        dirEntry->_path += dirent.name;

                        dirEntry->_displayName = dirent.name;

                        fio.dclose(fd);
                        return dirEntry;
                  }
            }
            fio.dclose(fd);
      }
      return NULL;
}

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