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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.
*
*/
#ifdef __N64__
#include "backends/fs/abstract-fs.h"
#include "backends/fs/n64/romfsstream.h"
#include <sys/param.h>
#include <unistd.h>
#include <n64utils.h>
#define ROOT_PATH "/"
/**
* Implementation of the ScummVM file system API based on N64 Hkz romfs.
*
* Parts of this class are documented in the base interface class, AbstractFSNode.
*/
class N64FilesystemNode : public AbstractFSNode {
protected:
Common::String _displayName;
Common::String _path;
bool _isDirectory;
bool _isValid;
public:
/**
* Creates a N64FilesystemNode with the root node as path.
*/
N64FilesystemNode();
/**
* Creates a N64FilesystemNode for a given path.
*
* @param path Common::String with the path the new node should point to.
* @param verify true if the isValid and isDirectory flags should be verified during the construction.
*/
N64FilesystemNode(const Common::String &p, bool verify = true);
virtual bool exists() const;
virtual Common::String getDisplayName() const {
return _displayName;
}
virtual Common::String getName() const {
return _displayName;
}
virtual Common::String getPath() const {
return _path;
}
virtual bool isDirectory() const {
return _isDirectory;
}
virtual bool isReadable() const;
virtual bool isWritable() const;
virtual AbstractFSNode *getChild(const Common::String &n) const;
virtual bool getChildren(AbstractFSList &list, ListMode mode, bool hidden) const;
virtual AbstractFSNode *getParent() const;
virtual Common::SeekableReadStream *createReadStream();
virtual Common::WriteStream *createWriteStream();
};
N64FilesystemNode::N64FilesystemNode() {
_isDirectory = true;
_displayName = "Root";
_isValid = true;
_path = ROOT_PATH;
}
N64FilesystemNode::N64FilesystemNode(const Common::String &p, bool verify) {
assert(p.size() > 0);
_path = p;
_displayName = lastPathComponent(_path, '/');
_isValid = true;
_isDirectory = true;
// Check if it's a dir
ROMFILE *tmpfd = romfs_open(p.c_str(), "r");
if (tmpfd) {
_isDirectory = (tmpfd->type == 0 || tmpfd->type == 1);
romfs_close(tmpfd);
}
}
bool N64FilesystemNode::exists() const {
int ret = -1;
ret = romfs_access(_path.c_str(), F_OK);
return ret == 0;
}
bool N64FilesystemNode::isReadable() const {
int ret = -1;
ret = romfs_access(_path.c_str(), R_OK);
return ret == 0;
}
// We can't write on ROMFS!
bool N64FilesystemNode::isWritable() const {
return false;
}
AbstractFSNode *N64FilesystemNode::getChild(const Common::String &n) 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);
Common::String newPath(_path);
if (_path.lastChar() != '/')
newPath += '/';
newPath += n;
return new N64FilesystemNode(newPath, true);
}
bool N64FilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, bool hidden) const {
assert(_isDirectory);
ROMDIR *dirp = romfs_opendir(_path.c_str());
romfs_dirent *dp;
if (dirp == NULL)
return false;
// loop over dir entries using readdir
while ((dp = romfs_readdir(dirp)) != NULL) {
// Skip 'invisible' files if necessary
if (dp->entryname[0] == '.' && !hidden) {
free(dp);
continue;
}
// Skip '.' and '..' to avoid cycles
if ((dp->entryname[0] == '.' && dp->entryname[1] == 0) || (dp->entryname[0] == '.' && dp->entryname[1] == '.')) {
free(dp);
continue;
}
// Start with a clone of this node, with the correct path set
N64FilesystemNode entry(*this);
entry._displayName = dp->entryname;
if (_path.lastChar() != '/')
entry._path += '/';
entry._path += entry._displayName;
// Force validity for now...
entry._isValid = 1;
entry._isDirectory = (dp->type == 0 || dp->type == 1);
// Honor the chosen mode
if ((mode == Common::FSNode::kListFilesOnly && entry._isDirectory) ||
(mode == Common::FSNode::kListDirectoriesOnly && !entry._isDirectory)) {
free(dp);
continue;
}
myList.push_back(new N64FilesystemNode(entry));
free(dp);
}
romfs_closedir(dirp);
return true;
}
AbstractFSNode *N64FilesystemNode::getParent() const {
if (_path == ROOT_PATH)
return 0;
const char *start = _path.c_str();
const char *end = lastPathComponent(_path, '/');
return new N64FilesystemNode(Common::String(start, end - start), false);
}
Common::SeekableReadStream *N64FilesystemNode::createReadStream() {
return RomfsStream::makeFromPath(getPath(), false);
}
Common::WriteStream *N64FilesystemNode::createWriteStream() {
return RomfsStream::makeFromPath(getPath(), true);
}
#endif //#ifdef __N64__
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