[Bug 42736] New: scanf doesn' t work as expected when using format string contains non-ascii chars

https://bugs.winehq.org/show_bug.cgi?id=42736

            Bug ID: 42736
           Summary: scanf doesn't work as expected when using format
                    string contains non-ascii chars
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: msvcrt
          Assignee: wine-bugs(a)winehq.org
          Reporter: zhangboyang.id(a)gmail.com
      Distribution: ---

Created attachment 57728
  --> https://bugs.winehq.org/attachment.cgi?id=57728
working example, should link msvcrt.dll (e.g. use mingw to compile)

(1) assume test.txt has this content

hexdump -C test.txt 
00000000  ef bb bf 68 65 6c 6c 6f                           |...hello|
00000008

// the content is  UTF8 BOM + "hello"



(2) fscanf(fp, "\xef\xbb\xbf") doesn't work as expected (using crossover
16.2.0)

char s[1000];
fscanf(fp, "\xef\xbb\xbf"); ///// won't read utf-8 bom as expected
fscanf(fp, "%s", s);

/opt/cxoffice/bin/wine test.exe | hexdump -C
00000000  73 3d ef bb bf 68 65 6c  6c 6f 0d 0a              |s=...hello..|
0000000c



(3) expected behavior is (under windows)
E:\winebug>test2
s=hello

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