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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2008, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* 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 for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
/* end stub */
#include <vector>
#include "algebra/nxmlalgebrareader.h"
#include "triangulation/nxmltrireader.h"
#include "utilities/stringutils.h"
namespace regina {
/**
* A unique namespace containing various specific-task packet readers.
*/
namespace {
/**
* Reads a single tetrahedron and its name and gluings.
*/
class NTetrahedronReader : public NXMLElementReader {
private:
NTriangulation* tri;
NTetrahedron* tet;
public:
NTetrahedronReader(NTriangulation* newTri, unsigned whichTet) :
tri(newTri), tet(tri->getTetrahedra()[whichTet]) {
}
virtual void startElement(const std::string&,
const regina::xml::XMLPropertyDict& props,
NXMLElementReader*) {
tet->setDescription(props.lookup("desc"));
}
virtual void initialChars(const std::string& chars) {
std::vector<std::string> tokens;
if (basicTokenise(back_inserter(tokens), chars) != 8)
return;
long tetIndex, permCode;
NPerm perm;
NTetrahedron* adjTet;
int adjFace;
for (int k = 0; k < 4; k ++) {
if (! valueOf(tokens[2 * k], tetIndex))
continue;
if (! valueOf(tokens[2 * k + 1], permCode))
continue;
if (tetIndex < 0 || tetIndex >=
static_cast<int>(tri->getNumberOfTetrahedra()))
continue;
if (! NPerm::isPermCode(
static_cast<unsigned char>(permCode)))
continue;
perm.setPermCode(static_cast<unsigned char>(permCode));
adjTet = tri->getTetrahedra()[tetIndex];
adjFace = perm[k];
if (adjTet == tet && adjFace == k)
continue;
if (tet->getAdjacentTetrahedron(k))
continue;
if (adjTet->getAdjacentTetrahedron(adjFace))
continue;
tet->joinTo(k, adjTet, perm);
}
}
};
/**
* Reads an entire set of tetrahedra with their names and gluings.
*/
class NTetrahedraReader : public NXMLElementReader {
private:
NTriangulation* tri;
unsigned readTets;
public:
NTetrahedraReader(NTriangulation* newTri) : tri(newTri),
readTets(0) {
}
virtual void startElement(const std::string& /* tagName */,
const regina::xml::XMLPropertyDict& props,
NXMLElementReader*) {
long nTets;
if (valueOf(props.lookup("ntet"), nTets))
for ( ; nTets > 0; nTets--)
tri->addTetrahedron(new NTetrahedron());
}
virtual NXMLElementReader* startSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict&) {
if (subTagName == "tet") {
if (readTets < tri->getNumberOfTetrahedra())
return new NTetrahedronReader(tri, readTets++);
else
return new NXMLElementReader();
} else
return new NXMLElementReader();
}
};
/**
* Reads an abelian group property.
*/
class NAbelianGroupPropertyReader : public NXMLElementReader {
public:
typedef NProperty<NAbelianGroup, StoreManagedPtr> PropType;
private:
PropType& prop;
public:
NAbelianGroupPropertyReader(PropType& newProp) : prop(newProp) {
}
virtual NXMLElementReader* startSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict&) {
if (subTagName == "abeliangroup")
if (! prop.known())
return new NXMLAbelianGroupReader();
return new NXMLElementReader();
}
virtual void endSubElement(const std::string& subTagName,
NXMLElementReader* subReader) {
if (subTagName == "abeliangroup") {
NAbelianGroup* ans =
dynamic_cast<NXMLAbelianGroupReader*>(subReader)->
getGroup();
if (ans)
prop = ans;
}
}
};
/**
* Reads a group presentation property.
*/
class NGroupPresentationPropertyReader : public NXMLElementReader {
public:
typedef NProperty<NGroupPresentation, StoreManagedPtr> PropType;
private:
PropType& prop;
public:
NGroupPresentationPropertyReader(PropType& newProp) :
prop(newProp) {
}
virtual NXMLElementReader* startSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict&) {
if (subTagName == "group")
if (! prop.known())
return new NXMLGroupPresentationReader();
return new NXMLElementReader();
}
virtual void endSubElement(const std::string& subTagName,
NXMLElementReader* subReader) {
if (subTagName == "group") {
NGroupPresentation* ans =
dynamic_cast<NXMLGroupPresentationReader*>(subReader)->
getGroup();
if (ans)
prop = ans;
}
}
};
}
NXMLElementReader* NXMLTriangulationReader::startContentSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict& props) {
// We don't read boundary component properties since they're stored
// across multiple property tags and they're easy to calculate
// anyway.
if (subTagName == "tetrahedra")
return new NTetrahedraReader(tri);
else if (subTagName == "zeroeff") {
bool b;
if (valueOf(props.lookup("value"), b))
tri->zeroEfficient = b;
} else if (subTagName == "splitsfce") {
bool b;
if (valueOf(props.lookup("value"), b))
tri->splittingSurface = b;
} else if (subTagName == "threesphere") {
bool b;
if (valueOf(props.lookup("value"), b))
tri->threeSphere = b;
} else if (subTagName == "H1")
return new NAbelianGroupPropertyReader(tri->H1);
else if (subTagName == "H1Rel")
return new NAbelianGroupPropertyReader(tri->H1Rel);
else if (subTagName == "H1Bdry")
return new NAbelianGroupPropertyReader(tri->H1Bdry);
else if (subTagName == "H2")
return new NAbelianGroupPropertyReader(tri->H2);
else if (subTagName == "fundgroup")
return new NGroupPresentationPropertyReader(tri->fundamentalGroup);
else if (subTagName == "turaevviro") {
unsigned long r, root;
double value;
if (valueOf(props.lookup("r"), r) &&
valueOf(props.lookup("root"), root) &&
valueOf(props.lookup("value"), value))
tri->turaevViroCache[std::make_pair(r, root)] = value;
}
return new NXMLElementReader();
}
void NXMLTriangulationReader::endContentSubElement(const std::string&,
NXMLElementReader*) {
}
NXMLPacketReader* NTriangulation::getXMLReader(NPacket*) {
return new NXMLTriangulationReader();
}
} // namespace regina
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