如何读取二进制文件与unicode文件名c ++？ [英] How to read binary file with unicode filename c++?

问题描述

在我正在开发的项目中，我处理了很多字符串操作;字符串从二进制文件以及其编码（可以是单字节或双字节）读取。基本上，我读取字符串值为 vector< char> ，读取编码，然后将所有字符串转换为 wstring 为了一致性。

In the project I'm working on, I deal with quite a few string manipulations; strings are read from binary files along with their encoding (which can be single or double byte). Essentially, I read the string value as vector<char>, read the encoding and then convert all strings to wstring, for consistency.

这样工作得相当不错，但是文件名本身可以是双字节字符。我完全无法实际打开输入流。在CI中将使用 _wfopen 函数传递 wchar_t * path ，但 wifstream 似乎有不同的行为，因为它是专门为从文件中读取双字节字符而设计的，而不是从具有双字节文件名的文件中读取单个字节。

This works reasonably well, however the filenames themselves can be double-byte chars. I'm totally stumped on how to actually open the input stream. In C I would use _wfopen function passing wchar_t* path, but wifstream seems to behave differently, as it's specifically designed for reading double-byte chars from a file, not for reading single bytes from a file with double-byte filename.

这个问题的解决方案是什么？

What is the solution to this problem?

编辑：搜索网络，看起来在标准C ++例如，请参阅此讨论）。但是我想知道C ++ 11是否真的在这个领域添加了一些有用的东西。

Searching the net, it looks like there's no support for this at all in standard C++ (e.g. see this discussion). However I'm wondering if C++11 actually adds something useful in this area.

推荐答案

映射到一个文件名是
的实现依赖。在Unix环境中，它通过
几乎只有字面上—只有'/'和'\0'特别处理
。在其他环境中，其他规则规则，我有
在过去有问题，因为我在UNIX中写了一个文件，
不能在Windows下执行任何操作（它处理一个'：'
在文件名中。）

How the string you pass to open is mapped to a filename is implementation dependent. In a Unix environment, it is passed almost literally—only '/' and '\0' are treated specially. In other environments, other rules rule, and I've had problems in the past because I'd written a file in Unix, and couldn't do anything with it under Windows (which treats a ':' in the filename specially).

另一个问题是这些文件来自哪里。如上面提到的
，可能绝对没有办法在
系统上打开它们：一个文件名为'：'根本不能打开
Windows。在Unix中，如果你最终在
文件名中出现'\0'字符，你可能也不能读它们，而UTF16
文件名在
Unix下显示为'\0'字符。你只有解决方案可能是在
系统上使用本地工具生成文件来重命名它们。

Another question is where these files come from. As mentionned above, there may be absolutely no way of opening them on your system: a filename with a ':' simply cannot be opened in Windows. In Unix, if you end up with '\0' characters in the filename itself, you probably can't read them either, and UTF16 filenames will appear to have '\0' characters in them under Unix. You're only solution may be to use native tools on the system which generated the files to rename them.

我不太清楚，这样的文件名在Unix
磁盘上首先。如果SMB服务器（如Samba
）在Windows框上提供服务时映射UTF16文件名？或者
NFS服务器，我认为这样的事情在Windows下也存在。

It's less clear to me how you could get such filenames on a Unix disk in the first place. How does an SMB server such as Samba map UTF16 filenames when it is serving on a Windows box? Or an NFS server—I think such things also exist under Windows.

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