diff options
Diffstat (limited to 'include/lib')
| -rw-r--r-- | include/lib/utils.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/lib/utils.h b/include/lib/utils.h index 9cc5468b..0936cbb3 100644 --- a/include/lib/utils.h +++ b/include/lib/utils.h @@ -55,4 +55,11 @@ #define round_down(value, boundary) \ ((value) & ~round_boundary(value, boundary)) +/* + * Evaluates to 1 if (ptr + inc) overflows, 0 otherwise. + * Both arguments must be unsigned pointer values (i.e. uintptr_t). + */ +#define check_uptr_overflow(ptr, inc) \ + (((ptr) > UINTPTR_MAX - (inc)) ? 1 : 0) + #endif /* __UTILS_H__ */ |