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gp32-fs.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001-2006 The ScummVM project
 * Copyright (C) 2002 Ph0x - GP32 Backend
 * Copyright (C) 2003-2004 DJWillis - GP32 Backend
 * Copyright (C) 2005-2006 Won Star - 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.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/backends/fs/gp32/gp32-fs.cpp $
 * $Id: gp32-fs.cpp 23274 2006-06-24 08:07:48Z fingolfin $
 *
 */

#include "stdafx.h"

#include "backends/fs/abstract-fs.h"
#include "backends/fs/fs.h"

class GP32FilesystemNode : public AbstractFilesystemNode {
protected:
      String _displayName;
      bool _isDirectory;
      bool _isRoot;
      String _path;

public:
      GP32FilesystemNode();
      GP32FilesystemNode(const String &path);

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

      virtual bool listDir(AbstractFSList &list, ListMode mode) const;
      virtual AbstractFilesystemNode *parent() const;
      virtual AbstractFilesystemNode *child(const String &name) const;
};

#define MAX_PATH_SIZE 256

const char gpRootPath[] = "gp:\\";
//char gpCurrentPath[MAX_PATH_SIZE] = "gp:\\";        // must end with '\'

int gpMakePath(const char *path, char *convPath) {
      // copy root or current directory
      const char *p;
      if ((*path == '/') || (*path == '\\')) {
            path++;
            p = gpRootPath;
            while (*p)
                  *convPath++ = *p++;
      }// else
      //    p = gpCurrentPath;

      //while (*p)
      //    *convPath++ = *p++;

      // add filenames/directories. remove "." & "..", replace "/" with "\"
      do {
            switch (*path) {
            case 0:
            case '/':
            case '\\':
                  if (*(convPath - 1) == '\\') {
                        // already ends with '\'
                  } else if ((*(convPath - 2) == '\\') && (*(convPath - 1) == '.')) {
                        convPath--; // remove '.' and end with '\'
                  } else if ((*(convPath - 3) == '\\') && (*(convPath - 2) == '.') && (*(convPath - 1) == '.')) {
                        convPath -= 3;    // remove "\.."
                        if (*(convPath - 1) == ':')
                              *convPath++ = '\\';     // "gp:" -> "gp:\"
                        else
                              while (*(convPath - 1) != '\\')
                                    convPath--; // remove one directory and end with '\'
                  } else {
                        *convPath++ = '\\';     // just add '\'
                  }
                  break;

            default:
                  *convPath++ = *path;
                  break;
            }
      } while (*path++);

      *convPath = '\\';

      //  *--convPath = 0;    // remove last '\' and null-terminate
      *convPath = 0;    // remove last '\' and null-terminate

      return 0;
}

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

00111 AbstractFilesystemNode *AbstractFilesystemNode::getRoot() {
      return new GP32FilesystemNode();
}

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

GP32FilesystemNode::GP32FilesystemNode() {
      _isDirectory = true;
      _isRoot = true;
      _displayName = "GP32 Root";
      _path = "gp:\\";
}

GP32FilesystemNode::GP32FilesystemNode(const String &path) {
      const char *dsplName = NULL, *pos = NULL;
      char convPath[256];

      gpMakePath(path.c_str(), convPath);

      _path = convPath;

      pos = convPath;
      while (*pos)
            if (*pos++ == '\\')
                  dsplName = pos;

      BP("FS: path name: %s", path.c_str());

      if (strcmp(path.c_str(), "gp:\\") == 0) {
            _isRoot = true;
            _displayName = "GP32 Root";
      } else {
            _isRoot = false;
            _displayName = String(dsplName);
      }
      _isDirectory = true;
}

bool GP32FilesystemNode::listDir(AbstractFSList &myList, ListMode mode) const {
      assert(_isDirectory);

      GPDIRENTRY dirEntry;
      GPFILEATTR attr;

      GP32FilesystemNode entry;

      uint32 read;

      if (mode == FilesystemNode::kListAll)
            LP("listDir(kListAll)");
      else
            LP("listDir(kListDirectoriesOnly)");

      int startIdx = 0; // current file
      String listDir(_path);
      //listDir += "/";
      while (GpDirEnumList(listDir.c_str(), startIdx++, 1, &dirEntry, &read)  == SM_OK) {
            if (dirEntry.name[0] == '.')
                  continue;
            entry._displayName = dirEntry.name;
            entry._path = _path;
            entry._path += dirEntry.name;
            entry._isRoot = false;

            GpFileAttr(entry._path.c_str(), &attr);
            entry._isDirectory = attr.attr & (1 << 4);

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

            if (entry._isDirectory)
                  entry._path += "\\";
            myList.push_back(new GP32FilesystemNode(entry));
      }

      BP("Dir... %s", listDir.c_str());

      return true;
}

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 *GP32FilesystemNode::parent() const {
      if(_isRoot)
            return 0;

      const char *start = _path.c_str();
      const char *end = lastPathComponent(_path);

      GP32FilesystemNode *p = new GP32FilesystemNode(String(start, end - start));

      NP("%s", p->_path.c_str());

      return p;
}

AbstractFilesystemNode *GP32FilesystemNode::child(const String &name) const {
      // FIXME: Pretty lame implementation! We do no error checking to speak
      // of, do not check if this is a special node, etc.
      assert(_isDirectory);
      String newPath(_path);
      if (_path.lastChar() != '\\')
            newPath += '\\';
      newPath += name;
      GP32FilesystemNode *p = new GP32FilesystemNode(newPath);

      return p;
}

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