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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef LIBRARIES_NACL_IO_DIR_NODE_H_
#define LIBRARIES_NACL_IO_DIR_NODE_H_
#include <map>
#include <string>
#include <vector>
#include "nacl_io/getdents_helper.h"
#include "nacl_io/node.h"
namespace nacl_io {
class DevFs;
class Html5Fs;
class HttpFs;
class MemFs;
class DirNode;
typedef sdk_util::ScopedRef<DirNode> ScopedDirNode;
class DirNode : public Node {
protected:
explicit DirNode(Filesystem* fs);
virtual ~DirNode();
public:
typedef std::map<std::string, ScopedNode> NodeMap_t;
virtual Error FTruncate(off_t size);
virtual Error GetDents(size_t offs,
struct dirent* pdir,
size_t count,
int* out_bytes);
virtual Error Read(const HandleAttr& attr,
void* buf,
size_t count,
int* out_bytes);
virtual Error Write(const HandleAttr& attr,
const void* buf,
size_t count,
int* out_bytes);
// Adds a finds or adds a directory entry as an INO, updating the refcount
virtual Error AddChild(const std::string& name, const ScopedNode& node);
virtual Error RemoveChild(const std::string& name);
virtual Error FindChild(const std::string& name, ScopedNode* out_node);
virtual int ChildCount();
protected:
void BuildCache_Locked();
void ClearCache_Locked();
private:
GetDentsHelper cache_;
NodeMap_t map_;
bool cache_built_;
friend class DevFs;
friend class Html5Fs;
friend class HttpFs;
friend class MemFs;
};
} // namespace nacl_io
#endif // LIBRARIES_NACL_IO_DIR_NODE_H_
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