snappy.js

var binding = require('bindings')('binding')
var assert = require('assert')

/**
 * Compress asyncronous.
 * If input isn't a string or buffer, automatically convert to buffer by using
 * JSON.stringify.
 */
exports.compress = function(input, callback) {
  if (!(typeof (input) === 'string' || Buffer.isBuffer(input)))
    return callback(new Error('input must be a String or a Buffer'))

  binding.compress(input, callback)
}

exports.compressSync = function (input) {
  assert(typeof(input) === 'string' || Buffer.isBuffer(input), 'input must be a String or a Buffer')

  return binding.compressSync(input)
}

/**
 * Asyncronous decide if a buffer is compressed in a correct way.
 */
exports.isValidCompressed = binding.isValidCompressed

exports.isValidCompressedSync = binding.isValidCompressedSync;

/**
 * Asyncronous uncompress previously compressed data.
 * A parser can be attached. If no parser is attached, return buffer.
 */
exports.uncompress = function(compressed, opts, callback) {
  if (!Buffer.isBuffer(compressed))
    return callback(new Error('input must be a Buffer'))

  if (!callback) {
    callback = opts
    opts = {}
  }

  if (typeof(opts.asBuffer) !== 'boolean')
    opts.asBuffer = true

  binding.uncompress(compressed, opts, callback)
}

exports.uncompressSync = function (compressed, opts) {
  assert(Buffer.isBuffer(compressed), 'input must be a Buffer');

  opts = opts || {};
  if (typeof(opts.asBuffer) !== 'boolean')
    opts.asBuffer = true

  return binding.uncompressSync(compressed, opts)
}