-void twister_small_lastBlock(twister_state_t* ctx, void* msg, uint16_t length_b);
-void twister_small_ctx2hash(void* dest, twister256_ctx_t* ctx, uint16_t hashsize_b);
+void twister_small_lastBlock(twister_state_t* ctx, const void* msg, uint16_t length_b);
+void twister_small_ctx2hash(void* dest, twister_state_t* ctx, uint16_t hashsize_b);
+void twister_small_nextBlock(twister_state_t* ctx, const void* msg);