mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsDataHashtable_h__
|
|
#define nsDataHashtable_h__
|
|
|
|
#include "nsHashKeys.h"
|
|
#include "nsBaseHashtable.h"
|
|
#include "mozilla/Maybe.h"
|
|
|
|
/**
|
|
* templated hashtable class maps keys to simple datatypes.
|
|
* See nsBaseHashtable for complete declaration
|
|
* @param KeyClass a wrapper-class for the hashtable key, see nsHashKeys.h
|
|
* for a complete specification.
|
|
* @param DataType the simple datatype being wrapped
|
|
* @see nsInterfaceHashtable, nsClassHashtable
|
|
*/
|
|
template<class KeyClass, class DataType>
|
|
class nsDataHashtable
|
|
: public nsBaseHashtable<KeyClass, DataType, DataType>
|
|
{
|
|
private:
|
|
typedef nsBaseHashtable<KeyClass, DataType, DataType> BaseClass;
|
|
|
|
public:
|
|
using typename BaseClass::KeyType;
|
|
using typename BaseClass::EntryType;
|
|
|
|
nsDataHashtable() {}
|
|
explicit nsDataHashtable(uint32_t aInitLength)
|
|
: BaseClass(aInitLength)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Retrieve the value for a key and remove the corresponding entry at
|
|
* the same time.
|
|
*
|
|
* @param aKey the key to retrieve and remove
|
|
* @return the found value, or Nothing if no entry was found with the
|
|
* given key.
|
|
*/
|
|
mozilla::Maybe<DataType> GetAndRemove(KeyType aKey)
|
|
{
|
|
mozilla::Maybe<DataType> value;
|
|
if (EntryType* ent = this->GetEntry(aKey)) {
|
|
value.emplace(mozilla::Move(ent->mData));
|
|
this->RemoveEntry(ent);
|
|
}
|
|
return value;
|
|
}
|
|
};
|
|
|
|
#endif // nsDataHashtable_h__
|