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/*
* Copyright (c) 2000-2021 Stephen Williams (steve@icarus.com)
* Copyright (c) 2001 Stephan Boettcher <stephan@nevis.columbia.edu>
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "config.h"
# include "compiler.h"
# include "netlist.h"
using namespace std;
NetUDP::NetUDP(NetScope*s, perm_string n, unsigned pins, PUdp *u)
: NetNode(s, n, pins), udp(u)
{
pin(0).set_dir(Link::OUTPUT);
for (unsigned idx = 1 ; idx < pins ; idx += 1) {
pin(idx).set_dir(Link::INPUT);
}
table_idx = udp->tinput.size() - 1;
}
bool NetUDP::first(string&inp, char&out) const
{
table_idx = (unsigned) -1;
return next(inp, out);
}
bool NetUDP::next(string&inp, char&out) const
{
table_idx++;
if (table_idx >= udp->tinput.size()) return false;
if (is_sequential()) {
inp = string("") + udp->tcurrent[table_idx] +
udp->tinput[table_idx];
assert(inp.length() == pin_count());
} else {
inp = udp->tinput[table_idx];
assert(inp.length() == (pin_count()-1));
}
out = udp->toutput[table_idx];
assert((out == '0') ||
(out == '1') ||
(out == 'x') ||
(is_sequential() && (out == '-')));
return true;
}
char NetUDP::get_initial() const
{
assert (is_sequential());
switch (udp->initial) {
case verinum::V0:
return '0';
case verinum::V1:
return '1';
case verinum::Vx:
case verinum::Vz:
return 'x';
}
assert(0);
return 'x';
}
unsigned NetUDP::port_count() const
{
return udp->ports.size();
}
string NetUDP::port_name(unsigned idx) const
{
assert(idx < udp->ports.size());
return udp->ports[idx];
}
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