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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.
*
* $Header$
*/
#if defined(__MORPHOS__)
#include <proto/dos.h>
#include <stdio.h>
#include "base/engine.h"
#include "../fs.h"
/*
* Implementation of the ScummVM file system API based on the MorphOS A-Box API.
*/
class ABoxFilesystemNode : public AbstractFilesystemNode {
protected:
BPTR _lock;
String _displayName;
bool _isDirectory;
bool _isValid;
String _path;
public:
ABoxFilesystemNode();
ABoxFilesystemNode(BPTR lock, CONST_STRPTR display_name = NULL);
ABoxFilesystemNode(const ABoxFilesystemNode *node);
~ABoxFilesystemNode();
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;
static FSList listRoot();
virtual AbstractFilesystemNode *parent() const;
virtual AbstractFilesystemNode *clone() const { return new ABoxFilesystemNode(this); }
};
AbstractFilesystemNode *FilesystemNode::getRoot()
{
return new ABoxFilesystemNode();
}
ABoxFilesystemNode::ABoxFilesystemNode()
{
_displayName = "Mounted Volumes";
_isValid = true;
_isDirectory = true;
_path = "";
_lock = NULL;
}
ABoxFilesystemNode::ABoxFilesystemNode(BPTR lock, CONST_STRPTR display_name)
{
int bufsize = 256;
_lock = NULL;
for (;;)
{
char name[bufsize];
if (NameFromLock(lock, name, bufsize) != DOSFALSE)
{
_path = name;
_displayName = display_name ? display_name : FilePart(name);
break;
}
if (IoErr() != ERROR_LINE_TOO_LONG)
{
_isValid = false;
warning("Error while retrieving path name: %d", IoErr());
return;
}
bufsize *= 2;
}
_isValid = false;
FileInfoBlock *fib = (FileInfoBlock*) AllocDosObject(DOS_FIB, NULL);
if (fib == NULL)
{
warning("Failed to allocate memory for FileInfoBlock");
return;
}
if (Examine(lock, fib) != DOSFALSE)
{
_isDirectory = fib->fib_EntryType > 0;
if (_isDirectory)
{
if (fib->fib_EntryType != ST_ROOT)
_path += "/";
_lock = DupLock(lock);
_isValid = (_lock != NULL);
}
else
_isValid = true;
}
FreeDosObject(DOS_FIB, fib);
}
ABoxFilesystemNode::ABoxFilesystemNode(const ABoxFilesystemNode *node)
{
_displayName = node->_displayName;
_isValid = node->_isValid;
_isDirectory = node->_isDirectory;
_path = node->_path;
_lock = DupLock(node->_lock);
}
ABoxFilesystemNode::~ABoxFilesystemNode()
{
if (_lock)
{
UnLock(_lock);
_lock = NULL;
}
}
FSList ABoxFilesystemNode::listDir(ListMode mode) const
{
FSList myList;
if (!_isValid)
error("listDir() called on invalid node");
if (!_isDirectory)
error("listDir() called on file node");
if (_lock == NULL)
{
/* This is the root node */
return listRoot();
}
/* "Normal" file system directory */
FileInfoBlock *fib = (FileInfoBlock*) AllocDosObject(DOS_FIB, NULL);
if (fib == NULL)
{
warning("Failed to allocate memory for FileInfoBlock");
return myList;
}
if (Examine(_lock, fib) != DOSFALSE)
{
while (ExNext(_lock, fib) != DOSFALSE)
{
ABoxFilesystemNode *entry;
String full_path;
BPTR lock;
if ((fib->fib_EntryType > 0 && (mode & kListDirectoriesOnly)) ||
(fib->fib_EntryType < 0 && (mode & kListFilesOnly)))
{
full_path = _path;
full_path += fib->fib_FileName;
lock = Lock(full_path.c_str(), SHARED_LOCK);
if (lock)
{
entry = new ABoxFilesystemNode(lock);
if (entry)
{
if (entry->isValid())
myList.push_back(wrap(entry));
else
delete entry;
}
UnLock(lock);
}
}
}
if (IoErr() != ERROR_NO_MORE_ENTRIES)
warning("Error while reading directory: %d", IoErr());
}
FreeDosObject(DOS_FIB, fib);
return myList;
}
AbstractFilesystemNode *ABoxFilesystemNode::parent() const
{
AbstractFilesystemNode *node = NULL;
if (!_isDirectory)
error("parent() called on file node");
if (_lock == NULL) {
/* Parent of the root is the root itself */
node = 0;
} else {
BPTR parent_lock = ParentDir(_lock);
if (parent_lock) {
node = new ABoxFilesystemNode(parent_lock);
UnLock(parent_lock);
} else
node = new ABoxFilesystemNode();
}
return node;
}
FSList ABoxFilesystemNode::listRoot()
{
FSList myList;
DosList *dosList;
CONST ULONG lockDosListFlags = LDF_READ | LDF_VOLUMES;
char name[256];
dosList = LockDosList(lockDosListFlags);
if (dosList == NULL)
{
warning("Could not lock dos list");
return myList;
}
dosList = NextDosEntry(dosList, LDF_VOLUMES);
while (dosList)
{
if (dosList->dol_Type == DLT_VOLUME && // Should always be true, but ...
dosList->dol_Name && // Same here
dosList->dol_Task // Will be NULL if volume is removed from drive but still in use by some program
)
{
ABoxFilesystemNode *entry;
CONST_STRPTR volume_name = (CONST_STRPTR)BADDR(dosList->dol_Name)+1;
CONST_STRPTR device_name = (CONST_STRPTR)((struct Task *)dosList->dol_Task->mp_SigTask)->tc_Node.ln_Name;
BPTR volume_lock;
strcpy(name, volume_name);
strcat(name, ":");
volume_lock = Lock(name, SHARED_LOCK);
if (volume_lock)
{
sprintf(name, "%s (%s)", volume_name, device_name);
entry = new ABoxFilesystemNode(volume_lock, name);
if (entry)
{
if (entry->isValid())
myList.push_back(wrap(entry));
else
delete entry;
}
UnLock(volume_lock);
}
}
dosList = NextDosEntry(dosList, LDF_VOLUMES);
}
UnLockDosList(lockDosListFlags);
return myList;
}
#endif // defined(__MORPHOS__)
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