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gp-fs.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001/2004 The ScummVM project
 * Copyright (C) 2002 Ph0x - GP32 Backend
 * Copyright (C) 2003/2004 DJWillis - GP32 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/gp32/gp-fs.cpp,v 1.7.2.1 2005/10/18 02:11:16 sev Exp $
 *
 */

#if defined (__GP32__)

#include "common/stdafx.h"

#include "backends/gp32/gp32.h"
#include "backends/fs/fs.h"
#include <stdio.h>
#include <gpstdio.h>

/*
 * Implementation of the ScummVM file system API based on GP32 SMC File Access.
 */

class GP32FilesystemNode : public FilesystemNode {
protected:
      Common::String _displayName;
      bool _isDirectory;
      bool _isValid;
      Common::String _path;

public:
      GP32FilesystemNode();
      GP32FilesystemNode(const Common::String &path);
      GP32FilesystemNode(const GP32FilesystemNode *node);

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

      virtual FSList listDir(ListMode mode = kListDirectoriesOnly) const;
      virtual FilesystemNode *parent() const;
      virtual FilesystemNode *clone() const { return new GP32FilesystemNode(this); }
};


AbstractFilesystemNode *FilesystemNode::getRoot() {
      return new GP32FilesystemNode();
}

GP32FilesystemNode::GP32FilesystemNode() {
      _displayName = "gp:\\SCUMMVM\\GAMES\\";
      _isValid = true;
      _isDirectory = true;
      _path = "gp:\\scummvm\\games\\";
}

/*
GP32FilesystemNode::GP32FilesystemNode() {
      _displayName = "gp:\\";
      _isValid = true;
      _isDirectory = true;
      _path = "gp:\\";
}
*/

GP32FilesystemNode::GP32FilesystemNode(const Common::String &p) {
      // TODO - extract last component from path
      _displayName = p;
      // TODO - check whether it is a directory, and whether the file actually exists
      _isValid = true;
      _isDirectory = true;
      _path = p;
}

GP32FilesystemNode::GP32FilesystemNode(const GP32FilesystemNode *node) {
      _displayName = node->_displayName;
      _isValid = node->_isValid;
      _isDirectory = node->_isDirectory;
      _path = node->_path;
}

AbstractFilesystemNode *FilesystemNode::getNodeForPath(const String &path) {
      return new GP32FilesystemNode(path);
}

FSList GP32FilesystemNode::listDir(ListMode mode) const {
      assert(_isDirectory);

      GPDIRENTRY dp;
      ulong read;

      FSList myList;

      int start=0; // current file

      // ... loop over dir entries using readdir
      while (GpDirEnumList(_path.c_str(), start++, 1, &dp, &read)  == SM_OK) {
            if (strcmp(dp.name,".")==0|| strcmp(dp.name,"..")==0) continue;
            GP32FilesystemNode entry;
            entry._displayName = dp.name;
            entry._path = _path;
            entry._path += dp.name;

            GPFILEATTR attr;
            char s[256];
            sprintf(s, "%s%s", _path.c_str(), dp.name);
            GpFileAttr(s, &attr);
            entry._isDirectory = attr.attr & (1<<4);

            // Honor the chosen mode
            if ((mode == kListFilesOnly && entry._isDirectory) ||
                  (mode == kListDirectoriesOnly && !entry._isDirectory))
                  continue;

            if (entry._isDirectory)
                  entry._path += "\\"; //ph0x
            myList.push_back(entry);
      }
      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 != '\\') { //ph0x
            --cur;
      }

      return cur+1;
}

FilesystemNode *GP32FilesystemNode::parent() const {

      GP32FilesystemNode *p = new GP32FilesystemNode();

// OLD - REMOVE ON CLEAN COMPILE
//    // Root node is its own parent. Still we can't just return this
//    // as the GUI code will call delete on the old node.
//    if (_path != "gp:\\") {  //ph0x
//          const char *start = _path.c_str();
//          const char *end = lastPathComponent(_path);
//
//          p->_path = String(start, end - start);
//          p->_isValid = true;
//          p->_isDirectory = true;
//          p->_displayName = lastPathComponent(p->_path);
//    }
//    return p;
//}

      // Root node is its own parent. Still we can't just return this
      // as the GUI code will call delete on the old node.
      if (_path != "gp:\\") {
            const char *start = _path.c_str();
            const char *end = lastPathComponent(_path);

            p->_path = Common::String(start, end - start);
            p->_displayName = lastPathComponent(p->_path);
      } else {
            p->_path = _path;
            p->_displayName = _displayName;
      }
      p->_isValid = true;
      p->_isDirectory = true;
      return p;
}

#endif /* defined(__GP32__) */

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