update targets

targets/lib.h

@@ -1,6 +1,8 @@
 #ifndef _include_fail_h
 #define _include_fail_h
 
+#include <stdint.h>
+
 #define INLINE __attribute__((always_inline)) inline
 #define NOINLINE __attribute__((noinline))
 
@@ -44,6 +46,15 @@
 #define RET(val) return val;
 #endif
 
+typedef uint16_t enc_t;
+typedef uint8_t plain_t;
+typedef int8_t sign_t;
+
+#define check(vc, A, B) (((vc - B) % A) == 0)
+#define encode(v, A, B) ((((plain_t)v) * ((sign_t)A)) + ((sign_t)B))
+#define decode(vc, A, B) ((vc - B) / A)
+#define equals(vc1, vc2, B1, B2) ((vc1 - vc2) == (B1 - B2))
+
 #ifdef __cplusplus
 extern "C" {
 #endif