sip_state         142 siphash.c          void (*init)(sip_state *s, const uint8_t *key);
sip_state         143 siphash.c          void (*update)(sip_state *s, const uint8_t *data, size_t len);
sip_state         144 siphash.c          void (*final)(sip_state *s, uint64_t *digest);
sip_state          32 siphash.h          sip_state state[1];