bool_combiner.cxx

#include <iostream>
#include <cgv/signal/bool_combiner.h>
#include "bool_signal.h"
 
namespace cgv {
    namespace signal {
 
void connect(bool_signal<>& s, bool(*fp)()) 
{
    s.connect(bool_function_functor<0>(fp)); 
}
 
void disconnect(bool_signal<>& s, bool(*fp)()) 
{
    s.disconnect(bool_function_functor<0>(fp));
}
 
bool bool_combiner::combine_result(bool new_value, bool& value) const
{
    if (combine_with_and) {
        value &= new_value;
        return short_circuit && !value;
    }
    value |= new_value;
    return short_circuit && value;
}
 
bool_combiner::bool_combiner(const char* opt)
{
    short_circuit = true;
    combine_with_and = true;
    set_options(opt);
}
 
bool bool_combiner::get_neutral_value() const
{
    return combine_with_and;
}
 
 
void bool_combiner::set_options(const char* opt)
{
    std::string s(opt);
    for (int i=0; i<(int)s.size(); ++i) {
        switch (s[i]) {
        case '*' : short_circuit = true;  break;
        case '+' : short_circuit = false; break;
        case '&' : combine_with_and = true; break;
        case '|' : combine_with_and = false; break;
        default: std::cerr << "unkown option character '" << s[i] << "' in constructor of cgv::signal::bool_combiner" << std::endl;
        }
    }
}
 
bool bool_combiner::is_combination_with_and() const
{
    return combine_with_and;
}
bool bool_combiner::is_evaluation_short_circuit() const
{
    return short_circuit;
}
 
    }
}