vcglib/vcg/container/vector_occ.h

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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
#ifndef __VCGLIB_TRACED_VECTOR__
#define __VCGLIB_TRACED_VECTOR__
#include <vcg/container/container_allocation_table.h>
#include <vcg/container/entries_allocation_table.h>
#include <assert.h>
namespace vcg {
/*@{*/
/*!
* This class represent a vector_occ. A vector_occ is derived by a std::vector.
* The characteristic of a vector_occ is that you can add (at run time) new attributes
* to the container::value_type elements contained in the vector. (see the example..)
* The position in memory of a traced vector is kept by the Container Allocation Table,
* which is a (unique) list of vector_occ positions.
*/
template <class VALUE_TYPE>
class vector_occ: public std::vector<VALUE_TYPE>{
typedef vector_occ<VALUE_TYPE> ThisType;
typedef std::vector<VALUE_TYPE> TT;
public:
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vector_occ():std::vector<VALUE_TYPE>(){id = ID(); ID()=ID()+1; reserve(1);}
~vector_occ();
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VALUE_TYPE * Pointer2begin(){
if(TT::empty()) return (VALUE_TYPE *)id; else return &*std::vector<VALUE_TYPE>::begin();
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}
std::list < CATBase<ThisType>* > attributes;
// override di tutte le funzioni che possono spostare
// l'allocazione in memoria del container
void push_back(const VALUE_TYPE & v);
void pop_back();
void resize(const unsigned int & size);
void reserve(const unsigned int & size);
/// this function enable the use of an optional attribute (see...)
template <class ATTR_TYPE>
void EnableAttribute(){
CAT<ThisType,ATTR_TYPE> * cat = CAT<ThisType,ATTR_TYPE>::New();
cat->Insert(*this);
attributes.push_back(cat);
}
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/// this function returns true if the attribute in the template parameter is enabled
/// Note: once an attribute is disabled, its data is lost (the memory freed)
template <class ATTR_TYPE>
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bool IsEnabledAttribute() const{
typename std::list < CATBase<ThisType> * >::const_iterator ia;
for(ia = attributes.begin(); ia != attributes.end(); ++ia)
if((*ia)->Id() == CAT<ThisType,ATTR_TYPE>::Id())
return true;
return false;
}
/// this function disable the use of an optional attribute (see...)
/// Note: once an attribute is disabled, its data is lost (the memory freed)
template <class ATTR_TYPE>
void DisableAttribute(){
typename std::list < CATBase<ThisType> * >::iterator ia;
for(ia = attributes.begin(); ia != attributes.end(); ++ia)
if((*ia)->Id() == CAT<ThisType,ATTR_TYPE>::Id())
{
(*ia)->Remove(*this);
//delete (*ia);
attributes.erase(ia);
break;
}
}
/// this function create a new attribute of type ATTR_TYPE and return an handle to
/// access the value of the attribute. Ex:
/// vector_occ<float> tv;
/// TempData<TVect,int> handle = tv.NewTempData<int>();
/// // now handle[&tv[123]] is the value of integer attribute associate with the position 123 on the vector
/// // NOTE: it works also if you do some push_back, resize, pop_back, reserve that cause the relocation
/// // of the vector_occ
template <class ATTR_TYPE>
TempData<ThisType,ATTR_TYPE> NewTempData(){
typedef typename CATEntry<ThisType,EntryCATMulti<ThisType> >::EntryType EntryTypeMulti;
CATEntry<ThisType,EntryTypeMulti>::Insert(*this);
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EntryTypeMulti entry = CATEntry<ThisType,EntryTypeMulti >::GetEntry(Pointer2begin());
entry.Data().push_back(new Wrap< ATTR_TYPE>);
((Wrap<ATTR_TYPE>*)entry.Data().back())->reserve(TT::capacity());
((Wrap<ATTR_TYPE>*)entry.Data().back())->resize(TT::size());
return TempData<ThisType,ATTR_TYPE>((Wrap<ATTR_TYPE>*) entry.Data().back());
}
/// reciprocal of NewTempData
template <class ATTR_TYPE>
void DeleteTempData(TempData<ThisType,ATTR_TYPE> & td){
typedef typename CATEntry<ThisType,EntryCATMulti<ThisType> >::EntryType EntryTypeMulti;
CATEntry<ThisType,EntryTypeMulti >::RemoveIfEmpty(*this);
EntryTypeMulti
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entry = CATEntry<ThisType,EntryCATMulti<ThisType> >::GetEntry(Pointer2begin);
entry.Data().remove((Wrap<ATTR_TYPE>*)td.Item());
delete ((Wrap<ATTR_TYPE>*)td.Item());
}
private:
VALUE_TYPE * old_start;
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int id;
static int & ID(){static int id; return id;}
void Update();
};
/*@}*/
template <class VALUE_TYPE>
void vector_occ<VALUE_TYPE>::push_back(const VALUE_TYPE & v){
std::vector<VALUE_TYPE>::push_back(v);
Update();
typename std::list < CATBase<ThisType> * >::iterator ia;
for(ia = attributes.begin(); ia != attributes.end(); ++ia)
(*ia)->AddDataElem(&(*(this->begin())),1);
}
template <class VALUE_TYPE>
void vector_occ<VALUE_TYPE>::pop_back(){
std::vector<VALUE_TYPE>::pop_back();
Update();
}
template <class VALUE_TYPE>
void vector_occ<VALUE_TYPE>::resize(const unsigned int & size){
std::vector<VALUE_TYPE>::resize(size);
Update();
typename std::list < CATBase<ThisType> * >::iterator ia;
for(ia = attributes.begin(); ia != attributes.end(); ++ia)
(*ia)->
Resize(&(*(this->begin())),size);
}
template <class VALUE_TYPE>
void vector_occ<VALUE_TYPE>::reserve(const unsigned int & size){
std::vector<VALUE_TYPE>::reserve(size);
Update();
}
template <class VALUE_TYPE>
void vector_occ<VALUE_TYPE>::
Update(){
typename std::list < CATBase<ThisType> * >::iterator ia;
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if(Pointer2begin() != old_start)
for(ia = attributes.begin(); ia != attributes.end(); ++ia)
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(*ia)->Resort(old_start,Pointer2begin());
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old_start = Pointer2begin();
}
template <class VALUE_TYPE>
vector_occ<VALUE_TYPE>::~vector_occ(){
typename std::list < CATBase<ThisType> * >::iterator ia;
for(ia = attributes.begin(); ia != attributes.end(); ++ia)
{
(*ia)->Remove(*this);
delete *ia;
}
}
}; // end namespace
#endif