diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libstrongswan/utils/utils.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/libstrongswan/utils/utils.h b/src/libstrongswan/utils/utils.h index 1b822dd61..cb60c6e3e 100644 --- a/src/libstrongswan/utils/utils.h +++ b/src/libstrongswan/utils/utils.h @@ -60,6 +60,20 @@ #define BUF_LEN 512 /** + * Build assertion macro for integer expressions, evaluates to 0 + */ +#define BUILD_ASSERT(x) (sizeof(char[(x) ? 0 : -1])) + +/** + * Build time check to assert a is an array, evaluates to 0 + * + * The address of an array element has a pointer type, which is not compatible + * to the array type. + */ +#define BUILD_ASSERT_ARRAY(a) \ + BUILD_ASSERT(!__builtin_types_compatible_p(typeof(a), typeof(&(a)[0]))) + +/** * General purpose boolean type. */ #ifdef HAVE_STDBOOL_H |