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/*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "Gate.h"
int Gate::gate_id_counter = 0;
Gate::Gate(GATE_TYPE type, int x, int y, int width, int height)
{
this->gate_type = type;
this->input_gate1 = nullptr;
this->input_gate2 = nullptr;
this->output_gate = nullptr;
this->id = Gate::gate_id_counter++; // increment counter after assigning
this->x = x;
this->y = y;
this->w = width;
this->h = height;
}
Gate::~Gate() {}
void Gate::update_state()
{
switch (this->gate_type)
{
case INPUT:
{
/* we're a simple input, do nothing */
break;
}
case OUTPUT:
{
/* we're a simple output, do nothing */
if (input_gate1 && input_gate1->get_output_state() == true)
{
this->output_state = true;
}
else if (input_gate1)
{
this->output_state = false;
}
break;
}
case AND:
{
if (!input_gate1 || !input_gate2) {this->output_state = false; return; }
output_state = input_gate1->get_output_state() & input_gate2->get_output_state();
break;
}
case OR:
{
if (!input_gate1 || !input_gate2) {this->output_state = false; return; }
output_state = input_gate1->get_output_state() | input_gate2->get_output_state();
break;
}
case NOT:
{
/* NOT only cares for input 1 */
if (!input_gate1) {this->output_state = false; return; }
output_state = !input_gate1->get_output_state();
break;
}
case NAND:
{
if (!input_gate1 || !input_gate2) {this->output_state = false; return; }
output_state = !(input_gate1->get_output_state() & input_gate2->get_output_state());
break;
}
case NOR:
{
if (!input_gate1 || !input_gate2) {this->output_state = false; return; }
output_state = !(input_gate1->get_output_state() | input_gate2->get_output_state());
break;
}
case XOR:
{
if (!input_gate1 || !input_gate2) {this->output_state = false; return; }
output_state = input_gate1->get_output_state() ^ input_gate2->get_output_state();
break;
}
case XNOR:
{
if (!input_gate1 || !input_gate2) {this->output_state = false; return; }
output_state = !(input_gate1->get_output_state() ^ input_gate2->get_output_state());
break;
}
default:
break;
}
}
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