defmodule BSON.Utils do
  @moduledoc false

  defmacro __using__(_) do
    quote do
      import BSON.Utils
      import Mongo.BinaryUtils

      @type_float     0x01
      @type_string    0x02
      @type_document  0x03
      @type_array     0x04
      @type_binary    0x05
      @type_objectid  0x07
      @type_bool      0x08
      @type_datetime  0x09
      @type_null      0x0A
      @type_regex     0x0B
      @type_js        0x0D
      @type_symbol    0x0E
      @type_js_scope  0x0F
      @type_int32     0x10
      @type_timestamp 0x11
      @type_int64     0x12
      @type_min       0x13
      @type_max       0x14
    end
  end

  @int32_min -2_147_483_648
  @int32_max  2_147_483_647
  @int64_min -9_223_372_036_854_775_808
  @int64_max  9_223_372_036_854_775_807

  defmacro is_int32(value) do
    quote do
          is_integer(unquote(value))
      and unquote(value) in unquote(@int32_min)..unquote(@int32_max)
    end
  end

  defmacro is_int64(value) do
    quote do
          is_integer(unquote(value))
      and unquote(value) in unquote(@int64_min)..unquote(@int64_max)
    end
  end
end