websnark/tools/stringifybigint.js
2019-07-15 17:42:45 +03:00

93 lines
2.6 KiB
JavaScript

/*
Copyright 2018 0kims association.
This file is part of snarkjs.
snarkjs is a 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.
snarkjs 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
snarkjs. If not, see <https://www.gnu.org/licenses/>.
*/
const bigInt = require("big-integer");
module.exports.stringifyBigInts = stringifyBigInts;
module.exports.unstringifyBigInts = unstringifyBigInts;
module.exports.hexifyBigInts = hexifyBigInts;
module.exports.unhexifyBigInts = unhexifyBigInts;
function stringifyBigInts(o) {
if ((typeof(o) == "bigint") || (o instanceof bigInt)) {
return o.toString(10);
} else if (Array.isArray(o)) {
return o.map(stringifyBigInts);
} else if (typeof o == "object") {
const res = {};
for (let k in o) {
res[k] = stringifyBigInts(o[k]);
}
return res;
} else {
return o;
}
}
function unstringifyBigInts(o) {
if ((typeof(o) == "string") && (/^[0-9]+$/.test(o) )) {
return bigInt(o);
} else if (Array.isArray(o)) {
return o.map(unstringifyBigInts);
} else if (typeof o == "object" && !(o instanceof bigInt)) {
const res = {};
for (let k in o) {
res[k] = unstringifyBigInts(o[k]);
}
return res;
} else {
return o;
}
}
function hexifyBigInts(o) {
if (typeof (o) === "bigInt" || (o instanceof bigInt)) {
let str = o.toString(16);
while (str.length < 64) str = "0" + str;
str = "0x" + str;
return str;
} else if (Array.isArray(o)) {
return o.map(hexifyBigInts);
} else if (typeof o == "object") {
const res = {};
for (let k in o) {
res[k] = hexifyBigInts(o[k]);
}
return res;
} else {
return o;
}
}
function unhexifyBigInts(o) {
if ((typeof(o) == "string") && (/^0x[0-9a-fA-F]+$/.test(o))) {
return bigInt(o);
} else if (Array.isArray(o)) {
return o.map(unhexifyBigInts);
} else if (typeof o == "object") {
const res = {};
for (let k in o) {
res[k] = unhexifyBigInts(o[k]);
}
return res;
} else {
return o;
}
}