memcmp
memcmp-
A memcmp ( memory compare ) operation is performed on the page and node 's page of consideration .
一个memcmp（内存比较）操作将在该页面和相关节点的页面上执行。
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Some tests are functional tests ; it 's not enough to know that a function called memcmp () is provided , it has to actually have the correct semantics .
有一些测试是功能测试；它不足以确定是否存在一个名为memcmp（）的函数，它的语义必须正确。