@swtc/serializer/lib/types/SerializedType.js

swtc serializer

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SerializedType = void 0;
const extend_1 = __importDefault(require("extend"));
class SerializedType {
    constructor(methods) {
        extend_1.default(this, methods);
    }
    static serialize_varint(so, val) {
        if (val < 0) {
            throw new Error("Variable integers are unsigned.");
        }
        if (val <= 192) {
            so.append([val]);
        }
        else if (val <= 12480) {
            val -= 193;
            so.append([193 + (val >>> 8), val & 0xff]);
        }
        else if (val <= 918744) {
            val -= 12481;
            so.append([241 + (val >>> 16), (val >>> 8) & 0xff, val & 0xff]);
        }
        else {
            throw new Error("Variable integer overflow.");
        }
    }
    parse_varint(so) {
        const b1 = so.read(1)[0];
        let b2;
        let b3;
        let result;
        if (b1 > 254) {
            throw new Error("Invalid varint length indicator");
        }
        if (b1 <= 192) {
            result = b1;
        }
        else if (b1 <= 240) {
            b2 = so.read(1)[0];
            result = 193 + (b1 - 193) * 256 + b2;
        }
        else if (b1 <= 254) {
            b2 = so.read(1)[0];
            b3 = so.read(1)[0];
            result = 12481 + (b1 - 241) * 65536 + b2 * 256 + b3;
        }
        return result;
    }
}
exports.SerializedType = SerializedType;
exports.default = SerializedType;
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