是u_char一个标准？ [英] Is u_char a standard?

问题描述

如果u_char是一个标准只是好奇。我一直用它假定它与uintX_t类型等一起定义。但我看到了一些我们的code基的转型从u_char为无符号的字符有原因，使用户不必定义u_char自己。

Just curious if u_char is a standard. I've always used it assuming it was defined along with uintX_t types and so on. But am seeing some of our code base transition from u_char to "unsigned char" with a reason "so users don't have to define u_char themselves"..

推荐答案

字符串 u_char 不会出现在这个C标准的草案：

The string u_char does not appear in this draft of the C standard:

<一个href=\"http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf\">http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf

它不是通过POSIX要求要么，据我所知。

It's not required by POSIX either, as far as I know.

我认为这是BSD（SYS / types.h中），和Windows（WINSOCK.H）。我不会考虑任何一个是标准 - 他们不是正式的标准，他们肯定不是标准C的一部分，但他们都有明确的规定和记录

I think it's in BSD (sys/types.h), and Windows (winsock.h). I would not consider either one to be "a standard" - they aren't formal standards, and they certainly aren't part of standard C, but they are clearly defined and documented.

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