1/*
 2    Copyright 2018 0KIMS association.
 3
 4    This file is part of circom (Zero Knowledge Circuit Compiler).
 5
 6    circom is a free software: you can redistribute it and/or modify it
 7    under the terms of the GNU General Public License as published by
 8    the Free Software Foundation, either version 3 of the License, or
 9    (at your option) any later version.
10
11    circom is distributed in the hope that it will be useful, but WITHOUT
12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14    License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with circom. If not, see <https://www.gnu.org/licenses/>.
18*/
19
20
21template toBin(n) {
22    signal input inp;
23    signal output out[n];
24    var lc1=0;
25
26    for (var i = 0; i<n; i++) {
27        out[i] <-- (inp >> i) & 1;
28        out[i] * (out[i] -1 ) === 0;
29        lc1 += out[i] * 2**i;
30    }
31
32    lc1 === inp;
33
34}
35
36
37component toBin(3) main;