vcglib/vcg/container/simple_temporary_data.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. *
* *
****************************************************************************/
/****************************************************************************
History
$Log: not supported by cvs2svn $
2008-05-16 12:09:26 +02:00
Revision 1.7 2008/05/16 08:48:49 ganovelli
Enable() and Disable() removed. The memory is allocated by the contructor
Revision 1.6 2008/05/15 16:35:17 ganovelli
Start() Stop() removed. Allocation on creation, disallocaiton on distruction
Revision 1.5 2007/02/02 00:01:54 tarini
overloaded operator "[]" (once more) to make it possible to index the temp. structure with an iterator
Revision 1.4 2005/07/11 13:12:34 cignoni
small gcc-related compiling issues (typenames,ending cr, initialization order)
Revision 1.3 2004/12/11 15:37:47 ganovelli
added one more [], now it is polymorphic, added typenames
Revision 1.2 2004/03/31 22:36:44 ganovelli
First Working Release (with this comment)
****************************************************************************/
#ifndef __VCGLIB_SIMPLE__
#define __VCGLIB_SIMPLE__
#include <limits>
#include <vector>
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#include <cstring>
namespace vcg {
class SimpleTempDataBase{
public:
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virtual ~SimpleTempDataBase() {};
SimpleTempDataBase() {};
virtual void Resize(const int & sz) = 0;
virtual void Reorder(std::vector<size_t> & newVertIndex)=0;
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virtual int SizeOf() const = 0;
virtual void * DataBegin() = 0;
virtual void * At(unsigned int i ) = 0;
};
template <class TYPE>
struct VectorNBW: public std::vector<TYPE> {};
template <>
class VectorNBW<bool>{
public:
VectorNBW():data(0),datasize(0),datareserve(0){}
bool * data ;
void reserve (const int & sz) {
if(sz<=datareserve) return;
bool * newdataLoc = new bool[ sz ];
if(datasize!=0) memcpy(newdataLoc,data,sizeof(datasize));
std::swap(data,newdataLoc);
if(newdataLoc != 0) delete newdataLoc;
datareserve = sz;
}
void resize (const int & sz) {
int oldDatasize = datasize;
if(sz <= oldDatasize) return;
if(sz > datareserve)
reserve(sz);
datasize = sz;
memset(&data[oldDatasize],0,datasize-oldDatasize);
}
void push_back(const bool & v) { resize(datasize+1); data[datasize] = v;}
void clear(){ datasize = 0;}
unsigned int size() const { return datasize;}
bool empty() const {return datasize==0;}
bool * begin() const {return data;}
bool & operator [](const int & i){return data[i];}
private:
int datasize;
int datareserve;
};
template <class STL_CONT, class ATTR_TYPE>
class SimpleTempData:public SimpleTempDataBase{
public:
typedef SimpleTempData<STL_CONT,ATTR_TYPE> SimpTempDataType;
typedef ATTR_TYPE AttrType;
STL_CONT& c;
VectorNBW<ATTR_TYPE> data;
int padding;
SimpleTempData(STL_CONT &_c):c(_c),padding(0){data.reserve(c.capacity());data.resize(c.size());};
SimpleTempData(STL_CONT &_c, const ATTR_TYPE &val):c(_c){
data.reserve(c.capacity());data.resize(c.size());
Init(val);
};
~SimpleTempData(){data.clear();}
void Init(const ATTR_TYPE &val)
{
std::fill(data.begin(),data.end(),val);
}
// access to data
ATTR_TYPE & operator[](const typename STL_CONT::value_type & v){return data[&v-&*c.begin()];}
ATTR_TYPE & operator[](const typename STL_CONT::value_type * v){return data[v-&*c.begin()];}
ATTR_TYPE & operator[](const typename STL_CONT::iterator & cont){return data[&(*cont)-&*c.begin()];}
ATTR_TYPE & operator[](const int & i){return data[i];}
void * At(unsigned int i ) {return &(*this)[i];};
// update temporary data size
bool UpdateSize(){
if(data.size() != c.size())
{
data.resize(c.size());
return false;
}
return true;
}
void Resize(const int & sz){
data.resize(sz);
}
void Reorder(std::vector<size_t> & newVertIndex){
for(unsigned int i = 0 ; i < data.size(); ++i){
if( newVertIndex[i] != std::numeric_limits<size_t>::max())
data[newVertIndex[i]] = data[i];
}
}
int SizeOf() const {return sizeof(ATTR_TYPE);}
void * DataBegin() {return data.empty()?NULL:&(*data.begin());}
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};
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template <class ATTR_TYPE>
class Attribute: public SimpleTempDataBase {
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public:
typedef ATTR_TYPE AttrType;
AttrType * attribute;
Attribute(){attribute = new ATTR_TYPE();}
~Attribute(){delete attribute;}
int SizeOf()const {return sizeof(ATTR_TYPE);}
void * DataBegin(){return attribute;}
void Resize(const int & ) {assert(0);}
void Reorder(std::vector<size_t> & ){assert(0);}
void * At(unsigned int i ) {assert(0);return (void*)0;}
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};
} // end namespace vcg
#endif