这个指针必须是一个绝对目录路径，因此您可能需要在自己的代码中调整该值。
This pointer must be an absolute directory path, so you may need to tweak this value in your own code.
这里要用到三个参数：上下文指针、可信任库文件的路径和文件名，以及证书所在目录的路径。
This takes three parameters: the context pointer, the path and the filename of the trust store file, and a path to a directory of certificates.
它查找代码路径将会或者可能造成null指针异常的情况，它还查找对null的冗余比较的情况。
It looks for cases where a code path will or could cause a null pointer exception, and it also looks for cases in which there is a redundant comparison to null.
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