DirHandler VirtualDiskNode::createDir(MyString path)
{
if (!isNormalizedPath(path))
{
assert(0);
return DirHandler(nullptr);
}
MyString dir_path = dirname(path).toLower();
DirNode* parent = getDirNode(dir_path);
if (!parent)
return DirHandler(nullptr);
MyString dir_name = basename(path);
if (dir_name == _T("..") || dir_name == _T("."))
return DirHandler(nullptr);
if (parent->findSubDir(dir_name.toLower()) != -1)
return DirHandler(nullptr);
DirNode* ndir = parent->addSubDir();
assert(ndir);
ndir->set_name(dir_name);
ndir->set_path(path);
// 新建文件夹中，包含“.”，“..”两个文件夹。
DirNode* n_self = ndir->addSubDir();
n_self->set_name(_T("."));
n_self->set_path(dir_path + _T("\\."));
DirNode* n_parent = ndir->addSubDir();
n_parent->set_name(_T(".."));
n_parent->set_path(dir_path + _T("\\.."));
n_parent->set_ctime(parent->get_ctime());
return DirHandler(ndir);
}
DirHandler VirtualDiskNode::openDir(MyString path)
{
if (!isNormalizedPath(path))
{
assert(0);
return DirHandler(nullptr);
}
path = path.toLower();
MyString dir_path = dirname(path);
DirNode* parent = getDirNode(dir_path);
if (!parent)
return DirHandler(nullptr);
MyString dir_name = basename(path);
// 访问根目录, “空”文件夹的情况
if (dir_name.isEmpty() || dir_name == _T("..") || dir_name == _T("."))
{
return DirHandler(parent);
}
int dir = parent->findSubDir(dir_name);
if (dir == -1)
{
return DirHandler(nullptr);
}
else
{
return DirHandler(parent->getSubDirRef(dir));
}
}
bool VirtualDiskNode::isDir(MyString path) const
{
if (!isNormalizedPath(path))
{
assert(0);
return false;
}
path = path.toLower();
MyString dir_path = dirname(path);
DirNode* parent = const_cast<VirtualDiskNode*>(this)->getDirNode(dir_path);
if (!parent)
return false;
MyString name = basename(path);
if (name.isEmpty())
return true;
int dir = parent->findSubDir(name);
return dir != -1;
}
void VirtualDiskNode::deleteDir(MyString path)
{
if (!isNormalizedPath(path))
{
assert(0);
return;
}
path = path.toLower();
MyString dir_path = dirname(path);
DirNode* parent = getDirNode(dir_path);
if (!parent)
return;
MyString dir_name = basename(path);
assert(!dir_name.isEmpty());
int dir = parent->findSubDir(dir_name);
if (dir != -1)
{
parent->removeSubDir(dir);
}
return;
}
DirNode* VirtualDiskNode::getDirNode(const MyString& path)
{
assert(isNormalizedPath(path));
Vector<MyString> dirnames = split(path);
DirNode* ret = &m_root;
if (dirnames[0] != ret->get_name().toLower() || ret->get_type() == FILE_TYPE)
return nullptr;
for (int i = 1; i < dirnames.size(); ++i)
{
int subdir = ret->findSubDir(dirnames[i]);
if (subdir == -1)
{
return nullptr;
}
else
{
ret = ret->getSubDirRef(subdir);
}
}
return ret;
}
