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/* lb-element.C
* Copyright (C) 2005 Pascal Giorgi
*
* Written by Pascal Giorgi <pgiorgi@uwaterloo.ca>
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#ifndef __LINBOX_lb_element_C
#define __LINBOX_lb_element_C
#include <lb-element.h>
#include <lb-element-data.h>
/********************************
* Allocate all global variable *
********************************/
// global hash table for allocated elements
EltTable element_hashtable;
/*******************************************
* API to contruct a element over a domain *
*******************************************/
const EltKey& createElement(const DomainKey &key) {
EltAbstract *e = constructElt(key);
std::pair<EltTable::const_iterator, bool> status;
status = element_hashtable.insert(std::pair<EltKey, EltAbstract*> (EltKey(e), e));
if (status.second)
return status.first->first;
else
throw lb_runtime_error("LinBox ERROR: element creation failed \n");// throw an exception
}
/*********************************************
* API to write an a element over its domain *
*********************************************/
class WriteElementFunctor{
protected:
std::ostream &os;
EltAbstract *elt;
public:
WriteElementFunctor(std::ostream &o, EltAbstract* e) : os(o), elt(e) {}
template<class Domain>
void operator() (void*, Domain *D) const {
if (EltEnvelope<typename Domain::Element> *ptr = dynamic_cast<EltEnvelope<typename Domain::Element>*>(elt))
D->write(os, *(ptr->getElement()))<<"\n";
else
throw lb_runtime_error("LinBox ERROR: incompatible domain and element type (element writing impossible)");
}
};
void writeElement (const EltKey &key, std::ostream &os){
EltTable::iterator it = element_hashtable.find(key);
if ( it == element_hashtable.end())
throw lb_runtime_error("LinBox ERROR: invalid element (writing impossible)");
WriteElementFunctor Fct(os, it->second);
DomainFunction::call(it->second->getDomainKey(), Fct);
}
/*******************************
* API to serialize an element *
*******************************/
template<class Domain, class Category>
void ToSerialElement (SerialElement& s, typename Domain::Element &e, const Domain &D, Category cat){
s.type ="integer";
LinBox::integer elt;
D.convert(elt, e);
s.list.push_back(elt);
}
template <class Domain>
void ToSerialElement (SerialElement& s, typename Domain::Element &e, const Domain &D, LinBox::RingCategories::RationalTag cat){
s.type ="rational";
LinBox::integer num, den;
D.get_num(num, e);
D.get_den(den, e);
s.list.push_back(num);
s.list.push_back(den);
}
class SerializeElementFunctor{
protected:
EltAbstract *elt;
public:
SerializeElementFunctor(EltAbstract *e) : elt(e) {}
template<class Domain>
void operator() (SerialElement &s, Domain *D) const {
if (EltEnvelope<typename Domain::Element> *ptr = dynamic_cast<EltEnvelope<typename Domain::Element>*>(elt)){
ToSerialElement(s, *(ptr->getElement()), *D, typename LinBox::FieldTraits<Domain>::categoryTag());
}
else
throw lb_runtime_error("LinBox ERROR: incompatible domain and element type (element writing impossible)");
}
};
void SerializeElement (SerialElement &s, const EltKey &key) {
EltTable::iterator it = element_hashtable.find(key);
if ( it == element_hashtable.end())
throw lb_runtime_error("LinBox ERROR: invalid element (serializing impossible)");
SerializeElementFunctor Fct(it->second);
DomainFunction::call(s, it->second->getDomainKey(), Fct);
}
#endif
// Local Variables:
// mode: C++
// tab-width: 4
// indent-tabs-mode: nil
// c-basic-offset: 4
// End:
// vim:sts=4:sw=4:ts=4:et:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
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