是否需要转换字符串的字节顺序？ [英] Is there need to convert byte order for strings?

问题描述

在发送和接收字符串时是否需要转换为网络/主机字节顺序。可用函数（例如htons（））仅适用于16位和32位整数。我也知道一个字符不起作用，因为通常这是一个字节大。但是字符串呢？

Is there need to convert to network/host byte ordering when sending and receiving strings. The available functions (such as htons()) only work with 16 and 32 bit integers. I also know for a fact that a single char shouldn't make a difference, as generally, it is a byte large. However what about strings ?

以下是代码段

 int len; recv(fd, &len, sizeof (int), 0); 
 len = ntohl(len);

 char* string = malloc(sizeof (char) * (len + 1)); 
 int received = recv(fd, string, sizeof (char) * len, 0); 
 string[len] = '\0';

推荐答案

这取决于字符串的编码。

It depends on the encoding of the string.

如果是面向字节的格式（普通的ASCII或UTF-8），那就没关系了。

If it's a byte-oriented format (plain old ASCII or UTF-8), then it doesn't matter.

如果它使用大于单个字节的代码点，那么它很重要。

If it uses "code points" larger than a single byte, then yes it matters.

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