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vcglib/vcg/container/container_allocation_table.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_CAT__
#define __VCGLIB_CAT__
#include <vector>
#include <map>
#include <string>
#include <list>
#include <algorithm>
#include <assert.h>
#include <vcg/container/entries_allocation_table.h>
namespace vcg {
/*@{*/
/*!
* CATBase is the abstract class for all the allocation tables. These table keep track of
* where the traced vector (see traced_ector.h) are kept in memory.
* The goal is to know (given a pointer to a memory location), which is the vector the pointed
* element is in
*
*/
struct CATBaseBase{
};
template <typename STL_CONT>
class CATBase: public CATBaseBase{
public:
typedef typename STL_CONT::value_type ValueType;
virtual void Resort(ValueType*,ValueType*) =0;
virtual void Remove(const STL_CONT&) = 0;
virtual void AddDataElem(ValueType*,int)=0;
virtual void Resize(ValueType*,int)=0;
public:
// ID serves as a type trait.
static int & Id(){
static int id=0;
return id;
}
};
/// CATEntry: first derivation templated on the type of entry
/// It implements all the methods to trace and access vector_occ's elements
template <typename STL_CONT, class ENTRY_TYPE>
class CATEntry: public CATBase<STL_CONT>{
public:
typedef typename STL_CONT::value_type ValueType;
typedef ENTRY_TYPE EntryType;
CATEntry(){if(Id()==0){
Id() = CATBase<STL_CONT>::Id()+1;
CATBase<STL_CONT>::Id() = Id();
}
}
static unsigned int Ord(const ValueType *);
static ENTRY_TYPE & GetEntry(typename STL_CONT::value_type*pt);
static void Insert( STL_CONT & c,bool cond=false ); // insert a vector to trace
virtual void Remove( const STL_CONT & c); // remove the container c
static void RemoveIfEmpty( const STL_CONT & c); // remove the container c
static void Remove( ValueType * v); // remove the container that contains v
virtual void Resort( ValueType* old_start, // resort the allocation table
ValueType* new_start); // after a container was moved
protected:
static std::list<ENTRY_TYPE >& AT(){ // tallocation table
static std::list<ENTRY_TYPE > allocation_table;
return allocation_table;
}
static bool & UTD(){
static bool upToDate; // true if Lower() and Upper()
return upToDate; // are up to date
}
static ValueType *& Lower() {
static ValueType * lower; // pointer to the first element
return lower; // of the last container accessed
}
static ValueType *& Upper() {
static ValueType * upper; // pointer to the first element
return upper; // if the container next to the last accessed
}
static typename std::list<ENTRY_TYPE>::iterator & Curr(){ // container that was last accessed
static typename std::list<ENTRY_TYPE>::iterator currEntry;
return currEntry;
}
static bool IsTheSameAsLast(const ValueType *pt); // true if pt is in the container
// that was accessed last
static void Update(const ValueType*); // set Upper() e Lower()
static typename std::list<ENTRY_TYPE>::iterator FindBase(const ValueType * pt);
// find the container that contains pt (naive)
virtual void AddDataElem(typename STL_CONT::value_type * pt,int n);// add n element to the auxiliary data
virtual void Resize(typename STL_CONT::value_type * pt,int n);// resize the auxiliary data
public:
static int & Id(){ // unique identifier of the istance
static int id=0; // (used as type trait)
return id;
}
};
// --------------------------- CATEntry: implementation --------------------
// derivazione fatta per i membri Occ (Optional Component Compact)
template <typename STL_CONT, class ENTRY_TYPE>
unsigned int CATEntry<STL_CONT,ENTRY_TYPE>::
Ord(const ValueType * pt)
{
Update(pt);
return (pt-Lower());
}
template <typename STL_CONT, class ENTRY_TYPE>
typename std::list<ENTRY_TYPE>::iterator CATEntry<STL_CONT,ENTRY_TYPE>::
FindBase(const ValueType * pt)
{
typename std::list<ENTRY_TYPE>::iterator ite,curr_base,_;
ite = AT().begin();
curr_base = AT().end();
for(;ite != AT().end();ite++)
if( pt < (*ite).Start())
return curr_base;
else
curr_base = ite;
return curr_base;
}
template <typename STL_CONT, class ENTRY_TYPE>
bool CATEntry< STL_CONT, ENTRY_TYPE>::
IsTheSameAsLast(const ValueType * pt)
{
return ( UTD() && ( !(Lower()> pt)) && (pt < Upper()) );
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry< STL_CONT, ENTRY_TYPE>::
Update(const ValueType * pt)
{
if(!IsTheSameAsLast(pt)){
typename std::list<ENTRY_TYPE>::iterator lower_ite,upper_ite;
lower_ite = FindBase(pt);
assert( lower_ite!=AT().end());
Lower() = (*lower_ite).Start();
if( (*lower_ite).Start() == AT().back().Start())
Upper() = (ValueType *) 0xffffffff;
else
{
upper_ite = lower_ite; ++upper_ite;
Upper() = (*upper_ite).Start();
}
Curr() = lower_ite;
UTD() = true;
}
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry< STL_CONT, ENTRY_TYPE>::
Resort(ValueType* old_start,ValueType* new_start)
{
AT().sort();
UTD() = false;
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry<STL_CONT, ENTRY_TYPE>::
Remove( const STL_CONT & c )
{
typename std::list<ENTRY_TYPE>::iterator ite;
for(ite = AT().begin(); ite != AT().end(); ++ite)
if((*ite).C() == &c)
{
AT().erase(ite);
break;
}
UTD() = false;
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry<STL_CONT, ENTRY_TYPE>::
RemoveIfEmpty( const STL_CONT & c )
{
typename std::list<ENTRY_TYPE>::iterator ite;
for(ite = AT().begin(); ite != AT().end(); ++ite)
if((*ite).C() == &c)
if(!(*ite).Empty())
AT().erase(ite);
UTD() = false;
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry<STL_CONT, ENTRY_TYPE>::
Remove(ValueType * pt)
{
typename std::list<ENTRY_TYPE>::iterator lower_ite;
lower_ite = FindBase(pt);
AT().erase(lower_ite);
UTD() = false;
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry<STL_CONT, ENTRY_TYPE>::
Insert( STL_CONT & c,bool cond )
{
ENTRY_TYPE entry(c);
typename std::list<ENTRY_TYPE>::iterator lower_ite,upper_ite;
upper_ite = FindBase( c.Pointer2begin());
bool isIn = (upper_ite != AT().end());
if(isIn){
if((*upper_ite).C() != &c )
++upper_ite;
else
return;
}
lower_ite = AT().insert(upper_ite,entry);
lower_ite->Reserve(c.capacity());
lower_ite->Resize(c.size());
UTD() = false;
}
template <typename STL_CONT, class ENTRY_TYPE>
ENTRY_TYPE & CATEntry<STL_CONT, ENTRY_TYPE>::
GetEntry(typename STL_CONT::value_type*pt){
Update(pt);
return *Curr();
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry<STL_CONT, ENTRY_TYPE>::
AddDataElem(typename STL_CONT::value_type * pt,int n)
{
Update(pt);
Curr()->Push_back(n);
}
template <typename STL_CONT, class ENTRY_TYPE>
void CATEntry<STL_CONT, ENTRY_TYPE>::
Resize(typename STL_CONT::value_type * pt,int n)
{
Update(pt);
Curr()->Resize(n);
}
//--------------------------------------------------------------------------------------------
template <typename STL_CONT,class ATTR_TYPE>
class CAT:public CATEntry<STL_CONT, EntryCAT<STL_CONT,ATTR_TYPE> >{
typedef typename STL_CONT::value_type ValueType;
typedef CATEntry<STL_CONT, EntryCAT<STL_CONT,ATTR_TYPE> > TT;
public:
static ATTR_TYPE & Get(const ValueType * pt);
static CAT<STL_CONT,ATTR_TYPE> * New();
static CAT<STL_CONT,ATTR_TYPE> *& Instance(){ static CAT<STL_CONT,ATTR_TYPE> * instance=NULL; return instance;}
};
//---------------------- CAT: implementation---------------------------------------------------
template <typename STL_CONT, class ATTR_TYPE>
ATTR_TYPE & CAT<STL_CONT,ATTR_TYPE>::
Get(const ValueType * pt)
{
int ord = Ord(pt);
return TT::Curr()->Data()[ord];
}
struct Env{
static std::map< std::string,CATBaseBase *> & TypeNameBounds(){
static std::map< std::string,CATBaseBase *> ntb; return ntb;}
template <class TYPE_1,class TYPE_2>
static CAT<TYPE_1,TYPE_2> * newCAT(){
std::string n = std::string(typeid(TYPE_1).name())+std::string(typeid(TYPE_2).name());
std::map< std::string,CATBaseBase *>::iterator ti = TypeNameBounds().find(n);
if(ti == TypeNameBounds().end()){
CAT<TYPE_1,TYPE_2> * res = new CAT<TYPE_1,TYPE_2>();
TypeNameBounds().insert(std::pair<std::string,CATBaseBase*>(n,res));
return res;
}
else (CAT<TYPE_1,TYPE_2> *) (*ti).second;
}
};
template <typename STL_CONT, class ATTR_TYPE>
CAT<STL_CONT,ATTR_TYPE> * CAT<STL_CONT,ATTR_TYPE>::
New(){
if(Instance()==NULL)
{
// Instance() = new CAT<STL_CONT,ATTR_TYPE>();
Instance() = Env::newCAT<STL_CONT,ATTR_TYPE>();
}
return Instance();
}
};//end namespace vcg
#endif
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