[英]How do I write a UTF-8 encoded string to a file in windows, in C++
I have a string that may or may not have unicode characters in it, I am trying to write that to a file on windows. 我有一个字符串,可能有也可能没有unicode字符,我试图将其写入Windows上的文件。 Below I have posted a sample bit of code, my problem is that when I fopen and read the values back out windows, they are all being interpreted as UTF-16 characters.
下面我发布了一些示例代码,我的问题是当我fopen并将值读回窗口时,它们都被解释为UTF-16字符。
char* x = "Fool";
FILE* outFile = fopen( "Serialize.pef", "w+,ccs=UTF-8");
fwrite(x,strlen(x),1,outFile);
fclose(outFile);
char buffer[12];
buffer[11]=NULL;
outFile = fopen( "Serialize.pef", "r,ccs=UTF-8");
fread(buffer,1,12,outFile);
fclose(outFile);
The characters are also interpreted as UTF-16 if I open the file in wordpad etc. What am I doing wrong? 如果我在wordpad等中打开文件,字符也会被解释为UTF-16。我做错了什么?
Yes, when you specify that the text file should be encoded in UTF-8, the CRT implicitly assumes that you'll be writing Unicode text to the file. 是的,当您指定文本文件应以UTF-8编码时,CRT隐式假定您将Unicode文本写入文件。 Not doing so doesn't make sense, you wouldn't need UTF-8.
不这样做没有意义,你不需要UTF-8。 This will work proper:
这将正常工作:
wchar_t* x = L"Fool";
FILE* outFile = fopen( "Serialize.txt", "w+,ccs=UTF-8");
fwrite(x, wcslen(x) * sizeof(wchar_t), 1, outFile);
fclose(outFile);
Or: 要么:
char* x = "Fool";
FILE* outFile = fopen( "Serialize.txt", "w+,ccs=UTF-8");
fwprintf(outFile, L"%hs", x);
fclose(outFile);
It is easy if you use the C++11
standard (because there are a lot of additional includes like "utf8"
which solves this problems forever). 如果你使用
C++11
标准很容易(因为有很多额外的包括像"utf8"
,它永远解决了这个问题)。
But if you want to use multi-platform code with older standards, you can use this method to write with streams: 但是,如果要使用旧标准的多平台代码,可以使用此方法使用流写入:
stxutif.h
to your project from sources above stxutif.h
到您的项目 Open the file in ANSI mode and add the BOM to the start of a file, like this: 以ANSI模式打开文件并将BOM添加到文件的开头,如下所示:
std::ofstream fs; fs.open(filepath, std::ios::out|std::ios::binary); unsigned char smarker[3]; smarker[0] = 0xEF; smarker[1] = 0xBB; smarker[2] = 0xBF; fs << smarker; fs.close();
Then open the file as UTF
and write your content there: 然后将文件作为
UTF
打开并在那里写下您的内容:
std::wofstream fs; fs.open(filepath, std::ios::out|std::ios::app); std::locale utf8_locale(std::locale(), new utf8cvt<false>); fs.imbue(utf8_locale); fs << .. // Write anything you want...
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