我没有发现任何严重的错误.但是你应该使用

I did not see anything serious wrong. But you should use

int fd = open(sFilePath, O_RDONLY | O_BINARY, 0);

确保文件以二进制模式打开，因为默认的Windows fmode是O_TEXT.

在二进制模式下，然后read应该返回iBytesToRead，而不仅仅是在文件结尾之前.

to ensure that the file is opened in binary mode, because the default Windows fmode is O_TEXT.

With binary mode, read should then return iBytesToRead while not just before the end of file.