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gp-fs.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001-2004 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/backends/gp32/gp-fs.cpp,v 1.3 2004/01/06 12:45:26 fingolfin Exp $
 */

#if defined (__GP32__)

#include "../fs/fs.h"
#include "stdio.h"

extern "C" {
      #include "gpstdio.h"
}

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

class GP32FilesystemNode : public FilesystemNode {
protected:
      String _displayName;
      bool _isDirectory;
      bool _isValid;
      String _path;
      
public:
      GP32FilesystemNode();
      GP32FilesystemNode(const String &path);
      GP32FilesystemNode(const GP32FilesystemNode *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 mode = kListDirectoriesOnly) const;
      virtual FilesystemNode *parent() const;
      virtual FilesystemNode *clone() const { return new GP32FilesystemNode(this); }
};


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

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

/*
GP32FilesystemNode::GP32FilesystemNode(const 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;
}

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

      GPDIRENTRY dp;
      ulong read;

      FSList *myList = new FSList();
      
      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();

      // 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;
}

#endif // defined(__GP32__)


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