pollution: table
struct _ENTRY *table; 

pollution: size
unsigned int size; 

pollution: filled
unsigned int filled; 

pollution: hsearch_data
struct hsearch_data { struct _ENTRY *table; unsigned int size; unsigned int filled; }; 

pollution: offsetof
#define offsetof(TYPE,MEMBER) __builtin_offsetof (TYPE, MEMBER)

pollution: NULL
#define NULL ((void *)0)