制作宽字符文件 [英] Making wide char file

问题描述

#ifndef UNICODE
#define UNICODE
#endif

#include <stdio.h>
int main()
{
    FILE* oFile;
    oFile = _wfopen(L"foo.txt",L"w");
    //*
    fwprintf(oFile,L"%s", L"ęłó☺☻♥♦•ń");
    fclose(oFile);
    return 0;
}

为什么这个程序创建一个 ASCII 文件而不是 UTF-16，尽管所有函数都是宽的?！

Why this program creates an ASCII file instead of UTF-16, though all functions are wide?!

foo.txt 内容:

foo.txt Content:

za[问号]ó[两个问号...] g[...四个...] ja[另外两个...] [五个*?] [和最后一个]

za[question mark]ó[two question marks...] g[...four...] ja[another two...] [five*?] [and the last one]

这是不可转换的.

fwprintf(oFile,L"%c%c%s",0xFE,0xFF,L"zażółć gęśłą jaźń ☺☻♥♦• ć");

现在，它显示中文符号，无论是小端还是大端字节序标记.

Now, it shows Chinese signs, regardless of little or big endian byte order mark is set.

推荐答案

假设您使用的是 MSVC，引用 _wfopen(我的粗体):

Assuming you are using MSVC, to quote the documentation for _wfopen (bold mine):

fopen 函数打开文件名指定的文件._wfopen 是 fopen 的宽字符版本；_wfopen 的参数是宽字符串.否则，_wfopen 和 fopen 的行为一样.只使用_wfopen对编码字符没有影响文件流中使用的集合.

The fopen function opens the file that is specified by filename. _wfopen is a wide-character version of fopen; the arguments to _wfopen are wide-character strings. Otherwise, _wfopen and fopen behave identically. Just using _wfopen has no effect on the coded character set that is used in the file stream.

进一步阅读文档:

fopen 支持 Unicode 文件流.要打开 Unicode 文件，请传递一个ccs 标志，指定 fopen 所需的编码，如下所示.

fopen supports Unicode file streams. To open a Unicode file, pass a ccs flag that specifies the desired encoding to fopen, as follows.

fopen(&fp, "newfile.txt", "rw, ccs= encoding ");

fopen(&fp, "newfile.txt", "rw, ccs= encoding ");

允许的编码值为 UNICODE、UTF-8 和 UTF-16LE.

Allowed values of encoding are UNICODE, UTF-8, and UTF-16LE.

以下代码写入一个 UTF-8 编码的文件.我将此源文件保存为 UTF-16BE、UTF-16LE 和 UTF-8，并且 MSVC 能够正确编译和运行.

The following code writes a UTF-8-encoded file. I saved this source file in UTF-16BE, UTF-16LE, and UTF-8 and MSVC was able to compile and run correctly.

#include <stdio.h>

int main()
{
    FILE* oFile;
    oFile = fopen("foo.txt","w, ccs=UTF-8");
    fwprintf(oFile,L"%s", L"ęłó☺☻♥♦•ń");
    fclose(oFile);
    return 0;
}

请注意，在 Windows 命令行上显示此输出需要切换到 UTF-8 代码页:

Note that displaying this output on the Windows command line requires switching to the UTF-8 code page:

C:\x>chcp
Active code page: 1252

C:\x>x

C:\x>type foo.txt
ęłó☺☻♥♦•ń
C:\Users\metolone\Desktop\x>chcp 65001
Active code page: 65001

C:\x>type foo.txt
ęłó☺☻♥♦•ń

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