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#include <stdio.h>
#include <windows.h>
#include <fcntl.h>
#include <io.h>
/* This program demonstrates that when Unicode printed text is redirected to
a file, the file is not in correct UTF-16.
*/
int main () {
int prevmode;
/*
When the output of this program is redirected to a file in Windows Command
Prompt you get for line breaks 0d0a 00, while it should be 0d00 0a00.
c:\test>.\testu16.exe > o.txt
c:\test>xxd o.txt
0000000: 6f00 6e00 6500 0d0a 0074 0077 006f 000d o.n.e....t.w.o..
0000010: 0a00 7400 6800 7200 6500 6500 0d0a 00 ..t.h.r.e.e....
When the output is redirected to a file in PowerShell, null characters
0000 are inserted. It looks like UTF-32 with an UTF-16 BOM and UTF-16 line
breaks.
PS C:\test> .\testu16.exe > p.txt
PS C:\test> xxd p.txt
0000000: fffe 6f00 0000 6e00 0000 6500 0000 0d00 ..o...n...e.....
0000010: 0a00 0000 7400 0000 7700 0000 6f00 0000 ....t...w...o...
0000020: 0d00 0a00 0000 7400 0000 6800 0000 7200 ......t...h...r.
0000030: 0000 6500 0000 6500 0000 0d00 0a00 0000 ..e...e.........
0000040: 0d00 0a00 ....
*/
prevmode = _setmode(_fileno(stdout), _O_U16TEXT);
fwprintf(stdout,L"one\n");
fwprintf(stdout,L"two\n");
fwprintf(stdout,L"three\n");
_setmode(_fileno(stdout), prevmode);
return 0;
}
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