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123 lines
4.0 KiB
123 lines
4.0 KiB
// Copyright (c) 2014-2019, MyMonero.com
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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const JSBigInt = require("./biginteger").BigInteger;
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//
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module.exports = function(currencyConfig)
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{
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// `currencyConfig` needs coinUnitPlaces, and coinSymbol
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var config = {}; // shallow copy of initConfig
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{
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for (var key in currencyConfig) {
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config[key] = currencyConfig[key];
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}
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config.coinUnits = new JSBigInt(10).pow(config.coinUnitPlaces);
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}
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this.formatMoneyFull = function(units) {
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units = units.toString();
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var symbol = units[0] === "-" ? "-" : "";
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if (symbol === "-") {
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units = units.slice(1);
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}
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var decimal;
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if (units.length >= config.coinUnitPlaces) {
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decimal = units.substr(
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units.length - config.coinUnitPlaces,
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config.coinUnitPlaces
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);
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} else {
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decimal = padLeft(units, config.coinUnitPlaces, "0");
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}
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return (
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symbol +
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(units.substr(0, units.length - config.coinUnitPlaces) || "0") +
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"." +
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decimal
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);
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};
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this.formatMoneyFullSymbol = function(units) {
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return this.formatMoneyFull(units) + " " + config.coinSymbol;
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};
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function padLeft(str, len, char) {
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while (str.length < len) str = char + str;
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return str;
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}
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function trimRight(str, char) {
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while (str[str.length - 1] == char) str = str.slice(0, -1);
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return str;
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}
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this.formatMoney = function(units) {
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var f = trimRight(this.formatMoneyFull(units), "0");
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if (f[f.length - 1] === ".") {
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return f.slice(0, f.length - 1);
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}
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return f;
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};
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this.formatMoneySymbol = function(units) {
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return this.formatMoney(units) + " " + config.coinSymbol;
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};
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this.parseMoney = function(str) {
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if (!str) return JSBigInt.ZERO;
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var negative = str[0] === "-";
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if (negative) {
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str = str.slice(1);
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}
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var decimalIndex = str.indexOf(".");
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if (decimalIndex == -1) {
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if (negative) {
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return JSBigInt.multiply(str, config.coinUnits).negate();
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}
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return JSBigInt.multiply(str, config.coinUnits);
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}
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if (decimalIndex + config.coinUnitPlaces + 1 < str.length) {
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str = str.substr(0, decimalIndex + config.coinUnitPlaces + 1);
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}
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if (negative) {
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return new JSBigInt(str.substr(0, decimalIndex))
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.exp10(config.coinUnitPlaces)
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.add(
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new JSBigInt(str.substr(decimalIndex + 1)).exp10(
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decimalIndex + config.coinUnitPlaces - str.length + 1,
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),
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).negate;
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}
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return new JSBigInt(str.substr(0, decimalIndex))
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.exp10(config.coinUnitPlaces)
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.add(
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new JSBigInt(str.substr(decimalIndex + 1)).exp10(
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decimalIndex + config.coinUnitPlaces - str.length + 1,
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),
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);
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};
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return this;
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}; |