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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.
*
* $URL$
* $Id$
*/
#if defined(PALMOS_MODE)
#include "PalmVersion.h"
#include "globals.h"
#include "backends/fs/abstract-fs.h"
/**
* Implementation of the ScummVM file system API based on PalmOS VFS API.
*
* Parts of this class are documented in the base interface class, AbstractFilesystemNode.
*/
class PalmOSFilesystemNode : public AbstractFilesystemNode {
protected:
String _displayName;
String _path;
bool _isDirectory;
bool _isValid;
bool _isPseudoRoot;
public:
/**
* Creates a PalmOSFilesystemNode with the root node as path.
*/
PalmOSFilesystemNode();
/**
* Creates a POSIXFilesystemNode for a given path.
*
* @param path String with the path the new node should point to.
*/
PalmOSFilesystemNode(const String &p);
virtual bool exists() const { return true; } //FIXME: this is just a stub
virtual String getDisplayName() const { return _displayName; }
virtual String getName() const { return _displayName; }
virtual String getPath() const { return _path; }
virtual bool isDirectory() const { return _isDirectory; }
virtual bool isReadable() const { return true; } //FIXME: this is just a stub
virtual bool isWritable() const { return true; } //FIXME: this is just a stub
virtual AbstractFilesystemNode *getChild(const String &n) const;
virtual bool getChildren(AbstractFSList &list, ListMode mode, bool hidden) const;
virtual AbstractFilesystemNode *getParent() const;
private:
/**
* Adds a single WindowsFilesystemNode to a given list.
* This method is used by getChildren() to populate the directory entries list.
*
* @param list List to put the file entry node in.
* @param mode Mode to use while adding the file entry to the list.
* @param base String with the directory being listed.
* @param find_data Describes a file that the FindFirstFile, FindFirstFileEx, or FindNextFile functions find.
*/
static void addFile(AbstractFSList &list, ListMode mode, const Char *base, FileInfoType* find_data);
};
/**
* 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 *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;
}
void PalmOSFilesystemNode::addFile(AbstractFSList &list, ListMode mode, const char *base, FileInfoType* find_data) {
PalmOSFilesystemNode entry;
bool isDir;
isDir = (find_data->attributes & vfsFileAttrDirectory);
if ((!isDir && mode == FilesystemNode::kListDirectoriesOnly) ||
(isDir && mode == FilesystemNode::kListFilesOnly))
return;
entry._isDirectory = isDir;
entry._displayName = find_data->nameP;
entry._path = base;
entry._path += find_data->nameP;
if (entry._isDirectory)
entry._path += "/";
entry._isValid = true;
entry._isPseudoRoot = false;
list.push_back(new PalmOSFilesystemNode(entry));
}
PalmOSFilesystemNode::PalmOSFilesystemNode() {
_isDirectory = true;
_displayName = "Root";
_isValid = true;
_path = "/";
_isPseudoRoot = false;
}
PalmOSFilesystemNode::PalmOSFilesystemNode(const String &p) {
_path = p;
_displayName = lastPathComponent(_path);
UInt32 attr;
FileRef handle;
Err error = VFSFileOpen(gVars->VFS.volRefNum, _path.c_str(), vfsModeRead, &handle);
if (!error) {
error = VFSFileGetAttributes(handle, &attr);
VFSFileClose(handle);
}
if (error) {
_isValid = false;
_isDirectory = false;
} else {
_isValid = true;
_isDirectory = (attr & vfsFileAttrDirectory);
}
_isPseudoRoot = false;
}
AbstractFilesystemNode *PalmOSFilesystemNode::getChild(const String &n) const {
assert(_isDirectory);
String newPath(_path);
if (_path.lastChar() != '/')
newPath += '/';
newPath += n;
FileRef handle;
UInt32 attr;
Err error = VFSFileOpen(gVars->VFS.volRefNum, newPath.c_str(), vfsModeRead, &handle);
if (error)
return 0;
error = VFSFileGetAttributes(handle, &attr);
VFSFileClose(handle);
if (error || !(attr & vfsFileAttrDirectory))
return 0;
return new PalmOSFilesystemNode(newPath);
}
bool PalmOSFilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, bool hidden) const {
//TODO: honor the hidden flag
Err error;
Char nameP[256];
FileInfoType desc;
FileRef handle;
UInt32 dirIterator = expIteratorStart;
desc.nameP = nameP;
desc.nameBufLen = 256;
error = VFSFileOpen(gVars->VFS.volRefNum, _path.c_str(), vfsModeRead, &handle);
if (error)
return false;
while (dirIterator != expIteratorStop) {
error = VFSDirEntryEnumerate(handle, &dirIterator, &desc);
if (!error) {
addFile(myList, mode, _path.c_str(), &desc);
}
}
VFSFileClose(handle);
return true;
}
AbstractFilesystemNode *PalmOSFilesystemNode::getParent() const {
PalmOSFilesystemNode *p = 0;
if (!_isPseudoRoot) {
const char *start = _path.c_str();
const char *end = lastPathComponent(_path);
p = new PalmOSFilesystemNode();
p->_path = String(start, end - start);
p->_isValid = true;
p->_isDirectory = true;
p->_displayName = lastPathComponent(p->_path);
p->_isPseudoRoot =(p->_path == "/");
}
return p;
}
#endif // PALMOS_MODE
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