我的一些数据是64位整数。我想送这些到一个页面上运行的JavaScript程序。

Some of my data are 64-bit integers. I would like to send these to a JavaScript program running on a page.

不过，据我所知道的，在大多数JavaScript实现整数为32位有符号的数量。

However, as far as I can tell, integers in most JavaScript implementations are 32-bit signed quantities.

我的两个选择似乎是：

选项（1）不是完美的，但选择（2），似乎远不如完美（数据丢失）。

Option (1) isn't perfect, but option (2) seems far less perfect (loss of data).

你怎样处理这种情况呢？

How have you handled this situation?

推荐答案

这似乎是少了使用JSON和更多的问题与JavaScript本身的问题。什么是你打算如何处理这些数字呢？如果它只是你需要传递回网站以后，通过各种手段简单地使用包含值的字符串魔令牌。如果你确实有做算术的价值，你可能写你自己的JavaScript程序的64位运算。

This seems to be less a problem with JSON and more a problem with Javascript itself. What are you planning to do with these numbers? If it's just a magic token that you need to pass back to the website later on, by all means simply use a string containing the value. If you actually have to do arithmetic on the value, you could possibly write your own Javascript routines for 64-bit arithmetic.

这可以重新present值在Javascript（因此JSON）将是通过把数字成两个32位值的一种方法，例如

One way that you could represent values in Javascript (and hence JSON) would be by splitting the numbers into two 32-bit values, eg.

  [ 12345678, 12345678 ]

要拆分的64位值到2个32位的值，做这样的事情：

To split a 64-bit value into two 32-bit values, do something like this:

  output_values[0] = (input_value >> 32) & 0xffffffff;
  output_values[1] = input_value & 0xffffffff;

然后重新组合两个32位值，以一个64位的值：

Then to recombine two 32-bit values to a 64-bit value:

  input_value = ((int64_t) output_values[0]) << 32) | output_values[1];