是使用无符号整数溢出好的做法呢？ [英] Is using unsigned integer overflow good practice?

问题描述

我是读C标准的一天，并注意到不同符号整数溢出（这是不确定的），无符号整数溢出是明确界定。我已经看到了它在许多code为最大值，等使用，但鉴于有关溢出巫毒教，这被认为是良好的编程习惯？它是无论如何不安全？我知道，很多现代语言如Python都不支持它 - 相反，他们继续延长大量的大小。

I was reading the C Standard the other day, and noticed that unlike signed integer overflow (which is undefined), unsigned integer overflow is well defined. I've seen it used in a lot of code for maximums, etc. but given the voodoos about overflow, is this considered good programming practice? Is it in anyway insecure? I know that a lot of modern languages like Python do not support it- instead they continue to extend the size of large numbers.

推荐答案

无符号整数溢出（在环绕的形状），哈希函数是经常采取的优势，并已自今年点。

Unsigned integer overflow (in the shape of wrap-around) is routinely taken advantage of in hashing functions, and has been since the year dot.

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