compound.js

module.exports = {
  compound: [readCompound, writeCompound, sizeOfCompound]
}

function readCompound (buffer, offset, typeArgs, rootNode) {
  const results = {
    value: {},
    size: 0
  }
  while (true) {
    const typ = this.read(buffer, offset, 'i8', rootNode)
    if (typ.value === 0) {
      offset += typ.size
      results.size += typ.size
      break
    }

    const readResults = this.read(buffer, offset, 'nbt', rootNode)
    offset += readResults.size
    results.size += readResults.size
    results.value[readResults.value.name] = {
      type: readResults.value.type,
      value: readResults.value.value
    }
  }
  return results
}

function writeCompound (value, buffer, offset, typeArgs, rootNode) {
  const self = this
  Object.keys(value).forEach(function (key) {
    offset = self.write({
      name: key,
      type: value[key].type,
      value: value[key].value
    }, buffer, offset, 'nbt', rootNode)
  })
  offset = this.write(0, buffer, offset, 'i8', rootNode)

  return offset
}

function sizeOfCompound (value, typeArgs, rootNode) {
  const self = this
  const size = Object.keys(value).reduce(function (size, key) {
    return size + self.sizeOf({
      name: key,
      type: value[key].type,
      value: value[key].value
    }, 'nbt', rootNode)
  }, 0)
  return 1 + size
}