lmdb/index.js

Simple, efficient, scalable, high-performance LMDB interface

import { EventEmitter } from 'events';
import { setExternals, setNativeFunctions, Dbi, version } from './native.js';
import { arch, tmpdir, platform, endianness } from 'os';
import fs from 'fs';
import { Encoder as MsgpackrEncoder } from 'msgpackr';
import { WeakLRUCache } from 'weak-lru-cache';
import * as orderedBinary from 'ordered-binary';

orderedBinary.enableNullTermination();
setExternals({
	arch,
	fs,
	tmpdir,
	MsgpackrEncoder,
	WeakLRUCache,
	orderedBinary,
	EventEmitter,
	os: platform(),
	onExit(callback) {
		if (process.getMaxListeners() < process.listenerCount('exit') + 8)
			process.setMaxListeners(process.listenerCount('exit') + 8);
		process.on('exit', callback);
	},
	isLittleEndian: endianness() == 'LE',
});
export {
	toBufferKey as keyValueToBuffer,
	compareKeys,
	compareKeys as compareKey,
	fromBufferKey as bufferToKeyValue,
} from 'ordered-binary';
export { ABORT, IF_EXISTS, asBinary } from './write.js';
import { ABORT, IF_EXISTS, asBinary } from './write.js';
export { levelup } from './level.js';
export { SKIP } from '@harperfast/extended-iterable';
import { levelup } from './level.js';
export { clearKeptObjects, version } from './native.js';
import { nativeAddon } from './native.js';
export let { noop } = nativeAddon;
export const TIMESTAMP_PLACEHOLDER = (() => {
	if (endianness() == 'BE') {
		return new Uint8Array([0, 0, 0, 0, 1, 1, 1, 1]);
	} else {
		return new Uint8Array([1, 1, 1, 1, 0, 0, 0, 0]);
	}
})();
export const DIRECT_WRITE_PLACEHOLDER = (() => {
	if (endianness() == 'BE') {
		return new Uint8Array([0, 0, 0, 0, 2, 1, 1, 1]);
	} else {
		return new Uint8Array([1, 1, 1, 2, 0, 0, 0, 0]);
	}
})();
export function setSpecialWriteValue(destArray, placeholder, uint32Value) {
	destArray.set(placeholder);
	let uint32 = new Uint32Array(destArray.buffer, 0, 2);
	endianness() == 'BE' ? (uint32[0] = uint32Value) : (uint32[1] = uint32Value);
}
export {
	open,
	openAsClass,
	getLastVersion,
	allDbs,
	getLastTxnId,
} from './open.js';
import {
	toBufferKey as keyValueToBuffer,
	compareKeys as compareKey,
	fromBufferKey as bufferToKeyValue,
} from 'ordered-binary';
import { open, openAsClass, getLastVersion } from './open.js';
export const TransactionFlags = {
	ABORTABLE: 1,
	SYNCHRONOUS_COMMIT: 2,

	NO_SYNC_FLUSH: 0x10000,
};
export default {
	open,
	openAsClass,
	getLastVersion,
	compareKey,
	keyValueToBuffer,
	bufferToKeyValue,
	ABORT,
	IF_EXISTS,
	asBinary,
	levelup,
	TransactionFlags,
	version,
};