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simple_temporary_data.h
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simple_temporary_data.h
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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004-2016 \/)\/ *
* 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_SIMPLE__
#define __VCGLIB_SIMPLE__
#include <string>
#include <cstring>
#include <limits>
#include <vector>
#include <cassert>
namespace vcg
{
class SimpleTempDataBase
{
public:
virtual ~SimpleTempDataBase() {}
SimpleTempDataBase() {}
virtual void Resize(size_t sz) = 0;
virtual void Reorder(std::vector<size_t> &newVertIndex) = 0;
virtual size_t SizeOf() const = 0;
virtual void *DataBegin() = 0;
virtual const void* DataBegin() const = 0;
virtual void *At(size_t i) = 0;
virtual const void *At(size_t i) const = 0;
virtual void CopyValue(const size_t to, const size_t from, const SimpleTempDataBase *other) = 0;
};
template <class TYPE, class ...p>
class VectorNBW : public std::vector<TYPE, p...>
{
};
template <class ...p>
class VectorNBW<bool, p...>
{
public:
VectorNBW() : booldata(nullptr), datasize(0), datareserve(0) {}
~VectorNBW()
{
if (booldata)
delete[] booldata;
}
void reserve(size_t sz)
{
if (sz <= datareserve)
return;
bool* newdataLoc = new bool[sz];
if (datasize != 0) {
std::copy(booldata, booldata+datasize, newdataLoc);
// memcpy(newdataLoc, booldata, sizeof(bool) * sizeof(datasize));
}
std::swap(booldata, newdataLoc);
if (newdataLoc != 0)
delete[] newdataLoc;
datareserve = sz;
}
void resize(size_t sz)
{
int oldDatasize = datasize;
if ((int)sz <= oldDatasize)
{
datasize = sz;
return;
}
if (sz > datareserve)
reserve(sz);
datasize = sz;
for (unsigned int i = oldDatasize; i < datasize; ++i)
booldata[i] = false;
}
void push_back(const bool &v)
{
resize(datasize + 1);
booldata[datasize] = v;
}
void clear() { datasize = 0; }
unsigned int size() const { return datasize; }
bool empty() const { return datasize == 0; }
bool* data() {return booldata;}
const bool *data() const { return booldata; }
bool &operator[](size_t i) { return booldata[i]; }
const bool &operator[](size_t i) const { return booldata[i]; }
private:
bool *booldata;
size_t datasize;
size_t datareserve;
};
template <class STL_CONT, class ATTR_TYPE>
class SimpleTempData : public SimpleTempDataBase
{
public:
typedef SimpleTempData<STL_CONT, ATTR_TYPE> SimpTempDataType;
typedef ATTR_TYPE AttrType;
const STL_CONT &c;
VectorNBW<ATTR_TYPE> data;
int padding;
SimpleTempData(const STL_CONT &_c) : c(_c), padding(0)
{
data.reserve(c.capacity());
data.resize(c.size());
};
SimpleTempData(const 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::const_iterator &cont) { return data[&(*cont) - &*c.begin()]; }
ATTR_TYPE &operator[](const typename STL_CONT::iterator &cont) { return data[&(*cont) - &*c.begin()]; }
ATTR_TYPE &operator[](size_t i) { return data[i]; }
const ATTR_TYPE &operator[](const typename STL_CONT::value_type &v) const { return data[&v - &*c.begin()]; }
const ATTR_TYPE &operator[](const typename STL_CONT::value_type *v) const { return data[v - &*c.begin()]; }
const ATTR_TYPE &operator[](const typename STL_CONT::const_iterator &cont) const { return data[&(*cont) - &*c.begin()]; }
const ATTR_TYPE &operator[](const typename STL_CONT::iterator &cont) const { return data[&(*cont) - &*c.begin()]; }
const ATTR_TYPE &operator[](size_t i) const { return data[i]; }
void *At(size_t i) { return &(*this)[i]; }
const void *At(size_t i) const { return &(*this)[i]; }
void CopyValue(const size_t to, const size_t from, const SimpleTempDataBase *other)
{
assert(other != nullptr);
data[to] = *(static_cast<const ATTR_TYPE *>(other->At(from)));
}
// update temporary data size
bool UpdateSize()
{
if (data.size() != c.size())
{
data.resize(c.size());
return false;
}
return true;
}
void Resize(size_t sz)
{
data.resize(sz);
}
void Reorder(std::vector<size_t> &newVertIndex)
{
for (size_t i = 0; i < data.size(); ++i)
{
if (newVertIndex[i] != (std::numeric_limits<size_t>::max)())
data[newVertIndex[i]] = data[i];
}
}
size_t SizeOf() const { return sizeof(ATTR_TYPE); }
void *DataBegin() { return data.empty() ? nullptr : data.data(); }
const void *DataBegin() const { return data.empty() ? nullptr : data.data(); }
};
template <class ATTR_TYPE>
class Attribute : public SimpleTempDataBase
{
public:
typedef ATTR_TYPE AttrType;
Attribute() { attribute = new ATTR_TYPE(); }
~Attribute() { delete attribute; }
size_t SizeOf() const { return sizeof(ATTR_TYPE); }
void *DataBegin() { return attribute; }
const void* DataBegin() const {return attribute;}
void Resize(size_t) { assert(0); }
void Reorder(std::vector<size_t> &) { assert(0); }
void *At(size_t)
{
assert(0);
return (void *)0;
}
const void *At(size_t) const
{
assert(0);
return (void *)0;
}
void CopyValue(const size_t, const size_t, const SimpleTempDataBase *) { assert(0); }
private:
AttrType *attribute;
};
} // end namespace vcg
#endif