src/common/safe.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #include <stdbool.h>
   8 #include <stdint.h>
   9
  10 static inline
  11 bool bt_safe_to_mul_int64(int64_t a, int64_t b)
  12 {
  13         if (a == 0 || b == 0) {
  14                 return true;
  15         }
  16
  17         return a < INT64_MAX / b;
  18 }
  19
  20 static inline
  21 bool bt_safe_to_mul_uint64(uint64_t a, uint64_t b)
  22 {
  23         if (a == 0 || b == 0) {
  24                 return true;
  25         }
  26
  27         return a < UINT64_MAX / b;
  28 }
  29
  30 static inline
  31 bool bt_safe_to_add_int64(int64_t a, int64_t b)
  32 {
  33         return a <= INT64_MAX - b;
  34 }
  35
  36 static inline
  37 bool bt_safe_to_add_uint64(uint64_t a, uint64_t b)
  38 {
  39         return a <= UINT64_MAX - b;
  40 }