alloc-util: add alloca() counterparts for memdup() and memdup_suffix0()

2018-10-15 19:35:00 +02:00
parent 4348c847cc
commit 242c41b850
1 changed files with 15 additions and 0 deletions
@@ -46,6 +46,21 @@ static inline void *mfree(void *memory) {
 void* memdup(const void *p, size_t l) _alloc_(2);
 void* memdup_suffix0(const void *p, size_t l) _alloc_(2);

+#define memdupa(p, l)                           \
+        ({                                      \
+                void *_q_;                      \
+                _q_ = alloca(l);                \
+                memcpy(_q_, p, l);              \
+        })
+
+#define memdupa_suffix0(p, l)                   \
+        ({                                      \
+                void *_q_;                      \
+                _q_ = alloca(l + 1);            \
+                ((uint8_t*) _q_)[l] = 0;        \
+                memcpy(_q_, p, l);              \
+        })
+
 static inline void freep(void *p) {
        free(*(void**) p);
 }