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leveldown.js
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leveldown.js
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const util = require('util')
const AbstractLevelDOWN = require('./abstract-leveldown')
const xtend = require('xtend')
const binding = require('bindings')('leveldown').leveldown
const ChainedBatch = require('./chained-batch')
const Iterator = require('./iterator')
const Snapshot = require('./snapshot')
const rangeOptions = 'start end gt gte lt lte'.split(' ')
function LevelDOWN (location, options) {
if (!(this instanceof LevelDOWN)) {
return new LevelDOWN(location, options)
}
AbstractLevelDOWN.call(this, location, options)
this.binding = binding(location)
}
util.inherits(LevelDOWN, AbstractLevelDOWN)
LevelDOWN.prototype._open = function (options, callback) {
this.binding.open(options, callback)
}
LevelDOWN.prototype._close = function (callback) {
this.binding.close(callback)
}
LevelDOWN.prototype._put = function (key, value, options, callback) {
this.binding.put(key, value, options, callback)
}
LevelDOWN.prototype._get = function (key, options, callback) {
this.binding.get(key, options, callback)
}
LevelDOWN.prototype._del = function (key, options, callback) {
this.binding.del(key, options, callback)
}
LevelDOWN.prototype._chainedBatch = function () {
return new ChainedBatch(this)
}
LevelDOWN.prototype._batch = function (operations, options, callback) {
return this.binding.batch(operations, options, callback)
}
LevelDOWN.prototype.approximateSize = function (start, end, callback) {
if (start == null ||
end == null ||
typeof start === 'function' ||
typeof end === 'function') {
throw new Error('approximateSize() requires valid `start`, `end` and `callback` arguments')
}
if (typeof callback !== 'function') {
throw new Error('approximateSize() requires a callback argument')
}
start = this._serializeKey(start)
end = this._serializeKey(end)
this.binding.approximateSize(start, end, callback)
}
LevelDOWN.prototype.compactRange = function (start, end, callback) {
this.binding.compactRange(start, end, callback)
}
LevelDOWN.prototype.getProperty = function (property) {
if (typeof property !== 'string') {
throw new Error('getProperty() requires a valid `property` argument')
}
return this.binding.getProperty(property)
}
LevelDOWN.prototype._iterator = function (options) {
return new Iterator(this, options)
}
LevelDOWN.prototype.getSync = function (key) {
return this.binding.getSync(key)
}
LevelDOWN.prototype.putSync = function (key, value) {
return this.binding.putSync(key, value)
}
LevelDOWN.prototype.deleteSync = function (key) {
return this.binding.deleteSync(key)
}
LevelDOWN.prototype.snapshot = function (options) {
return new Snapshot(this, options)
}
LevelDOWN.destroy = function (location, callback) {
if (arguments.length < 2) {
throw new Error('destroy() requires `location` and `callback` arguments')
}
if (typeof location !== 'string') {
throw new Error('destroy() requires a location string argument')
}
if (typeof callback !== 'function') {
throw new Error('destroy() requires a callback function argument')
}
binding.destroy(location, callback)
}
LevelDOWN.repair = function (location, callback) {
if (arguments.length < 2) {
throw new Error('repair() requires `location` and `callback` arguments')
}
if (typeof location !== 'string') {
throw new Error('repair() requires a location string argument')
}
if (typeof callback !== 'function') {
throw new Error('repair() requires a callback function argument')
}
binding.repair(location, callback)
}
module.exports = LevelDOWN.default = LevelDOWN