@deepkit/bson
Version:
Deepkit BSON parser
52 lines • 1.67 kB
JavaScript
/*
* Deepkit Framework
* Copyright (C) 2021 Deepkit UG, Marc J. Schmidt
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the MIT License.
*
* You should have received a copy of the MIT License along with this program.
*/
import * as crypto from '@deepkit/crypto';
import { CustomError } from '@deepkit/core';
const { randomBytes } = crypto;
let PROCESS_UNIQUE = undefined;
export class BSONError extends CustomError {
}
function getUnique() {
if (PROCESS_UNIQUE)
return PROCESS_UNIQUE;
PROCESS_UNIQUE = randomBytes(5);
return PROCESS_UNIQUE;
}
export const hexTable = [];
for (let i = 0; i < 256; i++) {
hexTable[i] = (i <= 15 ? '0' : '') + i.toString(16);
}
/**
* Thin wrapper around the native type to allow to serialize it correctly
* in types like t.any.
*/
export class ObjectId {
static generate(time) {
if (!time)
time = Math.ceil(Date.now() / 1000);
const inc = (++ObjectId.index) % 0xffffff;
const processUnique = getUnique();
return ''
+ hexTable[(time >> 24) & 0xff]
+ hexTable[(time >> 16) & 0xff]
+ hexTable[(time >> 8) & 0xff]
+ hexTable[time & 0xff]
+ hexTable[processUnique[0]]
+ hexTable[processUnique[1]]
+ hexTable[processUnique[2]]
+ hexTable[processUnique[3]]
+ hexTable[processUnique[4]]
+ hexTable[(inc >> 16) & 0xff]
+ hexTable[(inc >> 8) & 0xff]
+ hexTable[inc & 0xff];
}
}
ObjectId.index = Math.ceil(Math.random() & 0xffffff);
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