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/* 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.
*
* $URL$
* $Id$
*/
#include "dc.h"
#include "backends/fs/abstract-fs.h"
#include <ronin/cdfs.h>
#include <stdio.h>
#include <unistd.h>
/**
* Implementation of the ScummVM file system API based on Ronin.
*
* Parts of this class are documented in the base interface class, AbstractFilesystemNode.
*/
/* A file */
class RoninCDFileNode : public AbstractFilesystemNode {
protected:
String _path;
static const char *lastPathComponent(const Common::String &str);
public:
RoninCDFileNode(const String &path) : _path(path) {};
virtual bool exists() const { return true; }
virtual String getName() const { return lastPathComponent(_path); }
virtual String getPath() const { return _path; }
virtual bool isDirectory() const { return false; }
virtual bool isReadable() const { return true; }
virtual bool isWritable() const { return false; }
virtual AbstractFilesystemNode *getChild(const String &n) const { return NULL; }
virtual bool getChildren(AbstractFSList &list, ListMode mode, bool hidden) const { return false; }
virtual AbstractFilesystemNode *getParent() const;
static AbstractFilesystemNode *makeFileNodePath(const Common::String &path);
};
/* A directory */
class RoninCDDirectoryNode : public RoninCDFileNode {
public:
RoninCDDirectoryNode(const String &path) : RoninCDFileNode(path) {};
virtual bool isDirectory() const { return true; }
virtual AbstractFilesystemNode *getChild(const String &n) const;
virtual bool getChildren(AbstractFSList &list, ListMode mode, bool hidden) const;
};
/* A file/directory which does not exist */
class RoninCDNonexistingNode : public RoninCDFileNode {
public:
RoninCDNonexistingNode(const String &path) : RoninCDFileNode(path) {};
virtual bool exists() const { return false; }
virtual bool isReadable() const { return false; }
};
/**
* Returns the last component of a given path.
*
* Examples:
* /foo/bar.txt would return /bar.txt
* /foo/bar/ would return /bar/
*
* @param str String containing the path.
* @return Pointer to the first char of the last component inside str.
*/
const char *RoninCDFileNode::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;
}
return cur + 1;
}
AbstractFilesystemNode *RoninCDFileNode::makeFileNodePath(const Common::String &path)
{
assert(path.size() > 0);
int fd;
if ((fd = open(path.c_str(), O_RDONLY)) >= 0) {
close(fd);
return new RoninCDFileNode(path);
}
else if ((fd = open(path.c_str(), O_DIR|O_RDONLY)) >= 0) {
close(fd);
return new RoninCDDirectoryNode(path);
}
else {
return NULL;
}
}
AbstractFilesystemNode *RoninCDDirectoryNode::getChild(const String &n) const {
String newPath(_path);
if (_path.lastChar() != '/')
newPath += '/';
newPath += n;
return makeFileNodePath(newPath);
}
bool RoninCDDirectoryNode::getChildren(AbstractFSList &myList, ListMode mode, bool hidden) const {
DIR *dirp = opendir(_path.c_str());
struct dirent *dp;
if (dirp == NULL)
return false;
// ... loop over dir entries using readdir
while ((dp = readdir(dirp)) != NULL) {
String newPath(_path);
if (newPath.lastChar() != '/')
newPath += '/';
newPath += dp->d_name;
if (dp->d_size < 0) {
// Honor the chosen mode
if (mode == FilesystemNode::kListFilesOnly)
continue;
myList.push_back(new RoninCDDirectoryNode(newPath+"/"));
} else {
// Honor the chosen mode
if (mode == FilesystemNode::kListDirectoriesOnly)
continue;
myList.push_back(new RoninCDFileNode(newPath));
}
}
closedir(dirp);
return true;
}
AbstractFilesystemNode *RoninCDFileNode::getParent() const {
if (_path == "/")
return 0;
const char *start = _path.c_str();
const char *end = lastPathComponent(_path);
return new RoninCDDirectoryNode(String(start, end - start));
}
AbstractFilesystemNode *OSystem_Dreamcast::makeRootFileNode() const {
return new RoninCDDirectoryNode("/");
}
AbstractFilesystemNode *OSystem_Dreamcast::makeCurrentDirectoryFileNode() const {
return makeRootFileNode();
}
AbstractFilesystemNode *OSystem_Dreamcast::makeFileNodePath(const Common::String &path) const {
AbstractFilesystemNode *node = RoninCDFileNode::makeFileNodePath(path);
return (node? node : new RoninCDNonexistingNode(path));
}
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