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////////////////////////////////////////////////////////////////////////////////
//
// Circuits.cc
//
// produced: 13/03/98 jr
// last change: 13/03/98 jr
//
////////////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include "Circuits.hh"
// Circuit:
SimplicialComplex Circuit::upper_facets() const {
SimplicialComplex result;
Simplex simp(first);
simp += second;
for (Simplex::iterator iter = second.begin(); iter != second.end(); ++iter) {
simp -= *iter;
result += simp;
simp += *iter;
}
return result;
}
SimplicialComplex Circuit::lower_facets() const {
SimplicialComplex result;
Simplex simp(first);
simp += second;
for (Simplex::iterator iter = first.begin(); iter != first.end(); ++iter) {
simp -= *iter;
result += simp;
simp += *iter;
}
return result;
}
Circuit::Circuit(const Chirotope& chiro, const IntegerSet& dependent_set) {
assert(dependent_set.card() == chiro.rank() + 1);
basis_type basis(dependent_set);
int pm(0);
bool found_nonzero(false);
for (IntegerSet::iterator iter = dependent_set.begin();
iter != dependent_set.end();
++iter) {
basis -= *iter;
int chiro_on_basis = chiro(basis);
#ifdef SUPER_VERBOSE
std::cerr << "chiro(" << basis << ") = " << chiro_on_basis << std::endl;
#endif
if (!found_nonzero && (chiro_on_basis != 0)) {
found_nonzero = true;
pm = chiro_on_basis;
first += *iter;
}
else {
if (chiro_on_basis * pm > 0) {
first += *iter;
}
else if (chiro_on_basis * pm < 0) {
second += *iter;
}
}
pm = -pm;
basis += *iter;
}
}
// Circuits:
Circuits::Circuits(const Chirotope& chiro) :
circuits_data(), _no(chiro.no()), _rank(chiro.rank()) {
size_type count(0);
if (_no == _rank) {
return;
}
Permutation dependent_perm(_no, _rank + 1);
do {
IntegerSet dependent_set(dependent_perm);
Circuit circuit(chiro, dependent_set);
if (!circuit.first.is_empty() || !circuit.second.is_empty()) {
insert(circuit.first + circuit.second, circuit);
if (CommandlineOptions::verbose() && (++count % 10000 == 0)) {
std::cerr << load() << " circuits computed so far." << std::endl;
}
}
} while (dependent_perm.lexnext());
if (CommandlineOptions::verbose()) {
std::cerr << load() << " circuits in total." << std::endl;
}
}
// stream output/input:
std::ostream& Circuits::print_string(std::ostream& ost) const {
ost << _no << ',' << _rank << ':' << std::endl;
ost << '{' << std::endl;
for (const_iterator iter = begin(); iter != end(); ++iter) {
ost << '[' << iter->dataptr()->first << ',' << iter->dataptr()->second << ']' << '\n';
}
ost << '}' << std::endl;
return ost;
}
std::istream& Circuits::read_string(std::istream& ist) {
char c;
Circuit circuit;
clear();
if (!(ist >> std::ws >> _no)) {
#ifdef READ_DEBUG
std::cerr << "Circuits::read_string(std::istream&): "
<< "number of points not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
if (!(ist >> std::ws >> c)) {
#ifdef READ_DEBUG
std::cerr << "Circuits::read_string(std::istream&): "
<< "separator not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
if (!(ist >> std::ws >> _rank)) {
#ifdef READ_DEBUG
std::cerr << "Circuits::read_string(std::istream&): "
<< "rank not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
if (!(ist >> std::ws >> c)) {
#ifdef READ_DEBUG
std::cerr << "Circuits::read_string(std::istream&): "
<< "separator not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
while (ist >> std::ws >> c) {
if (c == '{') {
continue;
}
else if (c == '}') {
break;
}
else {
ist.putback(c);
if (ist >> circuit) {
insert(circuit.first + circuit.second, circuit);
}
else {
#ifdef READ_DEBUG
std::cerr << "Circuits::read_string(std::istream&): "
<< "not of appropriate type." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
}
}
return ist;
}
// eof Circuits.cc
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