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Alex Rivera
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I'm testing a sparse file. But my test code doesn't work well. HANDLE h = CreateFileW(L"D:\\sparse.test", GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_ARCHIVE|FILE_ATTRIBUTE_SPARSE_FILE, 0); DWORD d = GetFileAttributes(L"D:\\sparse.test"); // The function returns 32(FILE_ATTRIBUTE_ARCHIVE). // Where is FILE_ATTRIBUTE_SPARSE_FILE flag? // How do I make a sparse file. DWORD written; WriteFile(h, "aaa", 3, &written, 0); SetFilePointer(h, 2*1024*1024*1023, 0, FILE_BEGIN); SetEndOfFile(h); WriteFile(h, "bbb", 3, &written, 0);
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