rrcompress_entry
struct rrcompress_entry key, *found;
found = (struct rrcompress_entry*)rbtree_search(&pcomp->tree, &key);
struct rrcompress_entry* entry;
uint8_t block[sizeof(struct rrcompress_entry)*1024];
struct rrcompress_entry* rra = (struct rrcompress_entry*)a;
struct rrcompress_entry* rrb = (struct rrcompress_entry*)b;