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/****************************************************************************
* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* OpenNI is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* OpenNI 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with OpenNI. If not, see <http://www.gnu.org/licenses/>. *
* *
****************************************************************************/
#ifndef _XN_STACK_H
#define _XN_STACK_H
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include "XnList.h"
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
/**
* The stack
*/
class XnStack
{
public:
/**
* Constructor. Initialize internal representations
*/
XnStack() {}
/**
* Destructor. Destroy internal representations
*/
~XnStack() {}
/**
* Push a new value to the stack
*
* @param value [in] The value to add to the stack
*
* @return XN_STATUS_ALLOC_FAILED Failed to add to the stack because no nodes are available.
*/
XnStatus Push(XnValue const& value)
{
return m_List.AddFirst(value);
}
/**
* Pop the value at the top of the stack
*
* @param value [out] The value that was at the top of the stack
*
* @return XN_STATUS_IS_EMPTY The stack is empty
*/
XnStatus Pop(XnValue& value)
{
if (IsEmpty())
{
return XN_STATUS_IS_EMPTY;
}
value = *(m_List.begin());
return m_List.Remove(m_List.begin());
}
/**
* Get the value at the top of the queue (it is user responsibility to check queue is not empty)
*
* @return a reference to the object at head of the queue.
*/
XnValue const& Top() const
{
return *(m_List.begin());
}
/**
* Get the value at the top of the queue (it is user responsibility to check queue is not empty)
*
* @return a reference to the object at head of the queue.
*/
XnValue& Top()
{
return *(m_List.begin());
}
/**
* Check if stack is empty
*/
XnBool IsEmpty() const
{
return m_List.IsEmpty();
}
/**
* Get current size of the stack
*/
XnUInt32 Size() const
{
return m_List.Size();
}
private:
XN_DISABLE_COPY_AND_ASSIGN(XnStack);
/** The internal XnList with which the stack is implemented. */
XnList m_List;
};
/**
* Declares a stack of type @a Type, named @a ClassName. The class uses @a Translator for translating
* from @a Type to XnValue. It is declared using the declspec @a decl.
*/
#define XN_DECLARE_STACK_WITH_TRANSLATOR_DECL(decl, Type, ClassName, Translator) \
/* Note: we use queue declaration, as this is the same interface. */ \
XN_DECLARE_QUEUE_WITH_TRANSLATOR_DECL(decl, Type, ClassName, Translator, XnStack)
/**
* Declares a stack of type @a Type, named @a ClassName. The class uses @a Translator for translating
* from @a Type to XnValue.
*/
#define XN_DECLARE_STACK_WITH_TRANSLATOR(Type, ClassName, Translator) \
XN_DECLARE_STACK_WITH_TRANSLATOR_DECL(, ClassName, Translator)
/**
* Declares a stack of type @a Type, named @a ClassName, that uses the default translator.
* It is declared using the declspec @a decl.
*/
#define XN_DECLARE_STACK_DECL(decl, Type, ClassName) \
XN_DECLARE_DEFAULT_VALUE_TRANSLATOR_DECL(decl, Type, XN_DEFAULT_TRANSLATOR_NAME(ClassName)) \
XN_DECLARE_STACK_WITH_TRANSLATOR_DECL(decl, Type, ClassName, XN_DEFAULT_TRANSLATOR_NAME(ClassName))
/**
* Declares a stack of type @a Type, named @a ClassName, that uses the default translator.
*/
#define XN_DECLARE_STACK(Type, ClassName) \
XN_DECLARE_STACK_DECL(, Type, ClassName)
#endif // _XN_STACK_H
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