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ps2-fs.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/backends/fs/ps2/ps2-fs.cpp $
 * $Id: ps2-fs.cpp 30944 2008-02-23 22:50:18Z sev $
 */

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

#include "systemps2.h"

#define DEFAULT_MODE (FIO_S_IRUSR | FIO_S_IWUSR | FIO_S_IRGRP | FIO_S_IWGRP | FIO_S_IROTH | FIO_S_IWOTH)

FILE *ps2_fopen(const char *fname, const char *mode);
int ps2_fclose(FILE *stream);
// extern int fileXioChdir(const char* pathname);

#include <fileXio_rpc.h>


extern AsyncFio fio;
extern OSystem_PS2 *g_systemPs2;

/**
 * Implementation of the ScummVM file system API based on the Ps2SDK.
 * 
 * Parts of this class are documented in the base interface class, AbstractFilesystemNode.
 */
00052 class Ps2FilesystemNode : public AbstractFilesystemNode {

friend class Ps2FilesystemFactory;

protected:
      String _displayName;
      String _path;
      bool _isDirectory;
      bool _isRoot;

public:
      /**
       * Creates a PS2FilesystemNode with the root node as path.
       */
      Ps2FilesystemNode();
      
      /**
       * Creates a PS2FilesystemNode for a given path.
       * 
       * @param path String with the path the new node should point to.
       */
      Ps2FilesystemNode(const String &path);
      Ps2FilesystemNode(const String &path, bool verify);
      
      /**
       * Copy constructor.
       */
      Ps2FilesystemNode(const Ps2FilesystemNode *node);
      
      virtual bool exists() const {
            int fd;

            printf("Q: Does %s exist ?\n", _path.c_str());

            if (_path[4] != ':') { // don't bother for relative path...
                                   //  ...they always fail on PS2!
                  printf("A: nope -> skip relative path\n");
                  return false;
            }

            if (_path[0] == 'h') { // bypass host
                  printf("A: nope -> skip host\n");
                  return false;
            }

            if ((fd = fio.open(_path.c_str(), O_RDONLY)) >= 0) { /* it's a file */
                  fio.close(fd);
                  printf("A: yep -> file\n");
                  return true;
            }

               /* romeo's black magic */
            fd = fio.open(_path.c_str(), O_RDONLY, DEFAULT_MODE | FIO_S_IFDIR); 
            if (fd == -EISDIR) {
                  printf("A: yep -> dir\n");
                  return true;
            }
            /* NOTE: it cannot be a file cause it would have been caught by
                     the previous test, so no need to close it ;-)          */

            printf("A: nope\n");
            return false;
      }

00116       virtual String getDisplayName() const { return _displayName; }
00117       virtual String getName() const { return _displayName; }
00118       virtual String getPath() const { return _path; }
00119       virtual bool isDirectory() const {

            printf("Q: Is %s a dir?\n", _path.c_str());

#if 0
            int fd;

            if (_path.empty()) {
                  printf("A: yep -> top level\n");
                  return true; // top level
            }

            if (_path.lastChar() == ':' ||
                  (_path.lastChar() == '/' && _path[_path.size()-2] == ':')) {
                  printf("A: yep -> device\n");
                  return true; // device
            }

            fd = fio.open(_path.c_str(), O_RDONLY, DEFAULT_MODE | FIO_S_IFDIR);
            if (fd == -EISDIR) {
                  printf("A: yep\n");
                  return true;
            }

            if (fd >= 0)
                  fio.close(fd);

            printf("A: nope\n");
            return false;
#else
            if (_isDirectory)
                  printf("A: yep -> _isDirectory == 1\n");
            else
                  printf("A: nope -> _isDirectory == 0\n");

            return _isDirectory;
#endif
      }

00158       virtual bool isReadable() const {
            int fd;
            if ((fd = fio.open(_path.c_str(), O_RDONLY)) >= 0) {
                  fio.close(fd);
                  return true;
            }
            return false;
      }

00167       virtual bool isWritable() const {
            int fd;
            if ((fd =  fio.open(_path.c_str(), O_WRONLY)) >= 0) {
                  fio.close(fd);
                  return true;
            }
            return false;
      }

      virtual AbstractFilesystemNode *clone() const { return new Ps2FilesystemNode(this); }
      virtual AbstractFilesystemNode *getChild(const String &n) const;
      virtual bool getChildren(AbstractFSList &list, ListMode mode, bool hidden) const;
      virtual AbstractFilesystemNode *getParent() const;
};

/**
 * Returns the last component of a given path.
 * 
 * @param str String containing the path.
 * @return Pointer to the first char of the last component inside str.
 */
const char *lastPathComponent(const Common::String &str) {
      if (str.empty())
            return "";

      const char *start = str.c_str();
      const char *cur = start + str.size() - 2;

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

      printf("romeo : lastPathComponent = %s\n", cur + 1);

      return cur + 1;
}

00204 Ps2FilesystemNode::Ps2FilesystemNode() {
      _isDirectory = true;
      _isRoot = true;
      _displayName = "PlayStation 2";
      _path = "";
}

00211 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);
            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
                        _displayName = "Harddisk";
            }
      }
}

Ps2FilesystemNode::Ps2FilesystemNode(const String &path, bool verify) {
      _path = path;
      _isDirectory = true;

      if (strcmp(path.c_str(), "") == 0) {
            _isRoot = true;
            _displayName = String("PlayStation 2");
            verify = false; /* root is always a dir*/
      } else {
            _isRoot = false;
            const char *dsplName = NULL, *pos = path.c_str();
            while (*pos)
                  if (*pos++ == '/')
                        dsplName = pos;
            if (dsplName)
                  _displayName = String(dsplName);
            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
                        _displayName = "Harddisk";
                  verify = false; /* devices are always dir */
            }
      }

      if (verify && !_isRoot) {
            int medium, fd;

            if (strncmp(path.c_str(), "pfs0", 4) == 0)
                  medium = 0;
            else if (strncmp(path.c_str(), "cdfs", 4) == 0)
                  medium = 1;
            else if (strncmp(path.c_str(), "mass", 4) == 0)
                  medium = 2;

            switch(medium) {

            case 0: /* hd */
            printf("hd >  ");
            fd = fio.open(_path.c_str(), O_RDONLY, DEFAULT_MODE | FIO_S_IFDIR);

            if (fd == -EISDIR) {
                  printf(" romeo : new node [ %s ] is a dir\n", path.c_str());
            }
            else if (fd >=0) {
                  _isDirectory = false;
                  printf(" romeo : new node [ %s ] is -not- a dir (%d)\n",
                        path.c_str(), fd);
                  fio.close(fd);
            }
            else
                  printf(" romeo : new node [ %s ] is -not- (%d)\n",
                         path.c_str(), fd);

            break;

            case 1: /* cd */
            printf("cd >  ");
            fd = fio.open(_path.c_str(), O_RDONLY, DEFAULT_MODE | FIO_S_IFDIR);

            if (fd == -ENOENT) {
                  printf(" romeo : new node [ %s ] is a dir\n", path.c_str());
            }
            else if (fd >=0) {
                  _isDirectory = false;
                  printf(" romeo : new node [ %s ] is -not- a dir (%d)\n",
                        path.c_str(), fd);
                  fio.close(fd);
            }
            else
                  printf(" romeo : new node [ %s ] is -not- (%d)\n",
                        path.c_str(), fd);

            break;

            case 2: /* usb */
            printf("usb >  ");
            // fd = fio.open(_path.c_str(), O_RDONLY, DEFAULT_MODE | FIO_S_IFDIR);
            fd = fio.chdir(path.c_str());

            if (fd == -48) {
                  printf(" romeo : new node [ %s ] is a dir\n", path.c_str());
                  // fio.close(fd);
                  // chdir("");
            }
            else {
                  _isDirectory = false;
                  printf(" romeo : new node [ %s ] is a -not- a dir (%d)\n",
                        path.c_str(), fd);
            }

            break;
            } /* switch(medium) */

      }
}

00335 Ps2FilesystemNode::Ps2FilesystemNode(const Ps2FilesystemNode *node) {
      _displayName = node->_displayName;
      _isDirectory = node->_isDirectory;
      _path = node->_path;
      _isRoot = node->_isRoot;
}

00342 AbstractFilesystemNode *Ps2FilesystemNode::getChild(const String &n) 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(n.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;
}

00376 bool Ps2FilesystemNode::getChildren(AbstractFSList &list, ListMode mode, bool hidden) const {
      //TODO: honor the hidden flag
      
      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 {
            char listDir[256];
            int fd;
            
            if (_path.lastChar() == '/' /* || _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;
      }
}

00444 AbstractFilesystemNode *Ps2FilesystemNode::getParent() 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();
}

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