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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 The ScummVM project
*
* 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(UNIX) || defined(__DC__)
#include "common/stdafx.h"
#include "../fs.h"
#ifdef MACOSX
#include <sys/types.h>
#endif
#include <sys/param.h>
#include <sys/stat.h>
#ifndef __DC__
#include <dirent.h>
#endif
#include <stdio.h>
#include <unistd.h>
/*
* Implementation of the ScummVM file system API based on POSIX.
*/
class POSIXFilesystemNode : public AbstractFilesystemNode {
protected:
String _displayName;
bool _isDirectory;
bool _isValid;
String _path;
public:
POSIXFilesystemNode();
POSIXFilesystemNode(const String &path);
virtual String displayName() const { return _displayName; }
virtual bool isValid() const { return _isValid; }
virtual bool isDirectory() const { return _isDirectory; }
virtual String path() const { return _path; }
virtual FSList listDir(ListMode mode = kListDirectoriesOnly) const;
virtual AbstractFilesystemNode *parent() const;
};
static 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 *FilesystemNode::getRoot() {
return new POSIXFilesystemNode();
}
AbstractFilesystemNode *FilesystemNode::getNodeForPath(const String &path) {
return new POSIXFilesystemNode(path);
}
POSIXFilesystemNode::POSIXFilesystemNode() {
#ifndef __DC__
// FIXME: It is evil & slow to always call getcwd here.
// The intention behind this hack was/is to be more user friendly
// in our save/load dialogs: Instead of starting at the FS root,
// we start at the current directory. However, that's just a hack.
// Proper solution would be to extend FilesystemNode by the concept
// of 'current' or 'default' directory, and then modify the
// save/load dialogs to explicitly use that as starting point.
char buf[MAXPATHLEN];
getcwd(buf, MAXPATHLEN);
_path = buf;
_displayName = lastPathComponent(_path);
_path += '/';
#else
_path = "/";
_displayName = _path;
#endif
_isValid = true;
_isDirectory = true;
}
POSIXFilesystemNode::POSIXFilesystemNode(const String &p) {
assert(p.size() > 0);
_path = p;
_displayName = lastPathComponent(_path);
_isValid = true;
_isDirectory = true;
}
FSList POSIXFilesystemNode::listDir(ListMode mode) const {
assert(_isDirectory);
DIR *dirp = opendir(_path.c_str());
struct dirent *dp;
FSList myList;
if (dirp == NULL)
return myList;
// ... loop over dir entries using readdir
while ((dp = readdir(dirp)) != NULL) {
// Skip 'invisible' files
if (dp->d_name[0] == '.')
continue;
String newPath(_path);
if (newPath.lastChar() != '/')
newPath += '/';
newPath += dp->d_name;
POSIXFilesystemNode entry(newPath);
#ifdef __DC__
entry._isDirectory = dp->d_size < 0;
#elif defined(SYSTEM_NOT_SUPPORTING_D_TYPE)
// TODO: d_type is not part of POSIX, so it might not be supported
// on some of our targets. For those systems where it isn't supported,
// add this #elif case, which tries to use stat() instead.
struct stat st;
entry._isValid = (0 == stat(entry._path.c_str(), &st));
entry._isDirectory = S_ISDIR(st.st_mode);
#else
entry._isValid = (dp->d_type == DT_DIR) || (dp->d_type == DT_REG);
entry._isDirectory = (dp->d_type == DT_DIR);
#endif
// Skip files that are invalid for some reason (e.g. because we couldn't
// properly stat them).
if (!entry._isValid)
continue;
// Honor the chosen mode
if ((mode == kListFilesOnly && entry._isDirectory) ||
(mode == kListDirectoriesOnly && !entry._isDirectory))
continue;
if (entry._isDirectory)
entry._path += "/";
myList.push_back(wrap(new POSIXFilesystemNode(entry)));
}
closedir(dirp);
return myList;
}
AbstractFilesystemNode *POSIXFilesystemNode::parent() const {
if (_path == "/")
return 0;
const char *start = _path.c_str();
const char *end = lastPathComponent(_path);
POSIXFilesystemNode *p = new POSIXFilesystemNode(String(start, end - start));
return p;
}
#endif // defined(UNIX)
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