macro: introduce FOREACH_ARRAY() macro

The pattern that runs all array element is quite common. But, sometimes, the number of element may be in a signed integer, or the array may be NULL.
2023-03-07 13:27:16 +09:00
parent 9200e520ad
commit 5716c27e1f
2 changed files with 57 additions and 0 deletions
@@ -297,6 +297,13 @@ static inline int __coverity_check_and_return__(int condition) {
             p != (typeof(p)) POINTER_MAX;                                               \
             p = *(++_l))

+#define _FOREACH_ARRAY(i, array, num, m, s)                             \
+        for (typeof(num) m = (num); m > 0; m = 0)                       \
+                for (typeof(array[0]) *s = (array), *i = s; s && i < s + m; i++)
+
+#define FOREACH_ARRAY(i, array, num)                                    \
+        _FOREACH_ARRAY(i, array, num, UNIQ_T(m, UNIQ), UNIQ_T(s, UNIQ))
+
 #define DEFINE_TRIVIAL_DESTRUCTOR(name, type, func)             \
        static inline void name(type *p) {                      \
                func(p);                                        \