tetris-fumen/lib/buffer.js

Fumen parser for tetris

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Buffer = void 0;
var ENCODE_TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var Buffer = /** @class */ (function () {
    function Buffer(data) {
        if (data === void 0) { data = ''; }
        this.values = data.split('').map(decodeToValue);
    }
    Buffer.prototype.poll = function (max) {
        var value = 0;
        for (var count = 0; count < max; count += 1) {
            var v = this.values.shift();
            if (v === undefined) {
                throw new Error('Unexpected fumen');
            }
            value += v * Math.pow(Buffer.tableLength, count);
        }
        return value;
    };
    Buffer.prototype.push = function (value, splitCount) {
        if (splitCount === void 0) { splitCount = 1; }
        var current = value;
        for (var count = 0; count < splitCount; count += 1) {
            this.values.push(current % Buffer.tableLength);
            current = Math.floor(current / Buffer.tableLength);
        }
    };
    Buffer.prototype.merge = function (postBuffer) {
        for (var _i = 0, _a = postBuffer.values; _i < _a.length; _i++) {
            var value = _a[_i];
            this.values.push(value);
        }
    };
    Buffer.prototype.isEmpty = function () {
        return this.values.length === 0;
    };
    Object.defineProperty(Buffer.prototype, "length", {
        get: function () {
            return this.values.length;
        },
        enumerable: false,
        configurable: true
    });
    Buffer.prototype.get = function (index) {
        return this.values[index];
    };
    Buffer.prototype.set = function (index, value) {
        this.values[index] = value;
    };
    Buffer.prototype.toString = function () {
        return this.values.map(encodeFromValue).join('');
    };
    Buffer.tableLength = ENCODE_TABLE.length;
    return Buffer;
}());
exports.Buffer = Buffer;
function decodeToValue(v) {
    return ENCODE_TABLE.indexOf(v);
}
function encodeFromValue(index) {
    return ENCODE_TABLE[index];
}