src/common/safe.h

   1
   2 #include <stdbool.h>
   3 #include <stdint.h>
   4
   5 static inline
   6 bool bt_safe_to_mul_int64(int64_t a, int64_t b)
   7 {
   8         if (a == 0 || b == 0) {
   9                 return true;
  10         }
  11
  12         return a < INT64_MAX / b;
  13 }
  14
  15 static inline
  16 bool bt_safe_to_mul_uint64(uint64_t a, uint64_t b)
  17 {
  18         if (a == 0 || b == 0) {
  19                 return true;
  20         }
  21
  22         return a < UINT64_MAX / b;
  23 }
  24
  25 static inline
  26 bool bt_safe_to_add_int64(int64_t a, int64_t b)
  27 {
  28         return a <= INT64_MAX - b;
  29 }
  30
  31 static inline
  32 bool bt_safe_to_add_uint64(uint64_t a, uint64_t b)
  33 {
  34         return a <= UINT64_MAX - b;
  35 }