lib: i_zero*() - Give compiler error if it's wrongly used on an array

dovecot · Sep 14, 2018 · 151ad1b · 151ad1b
1 parent 5c44ba8
commit 151ad1b
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/lib/macros.h b/src/lib/macros.h
@@ -235,8 +235,10 @@
 #endif
 
 /* Convenience wrappers for initializing a struct */
-#define i_zero(p) memset(p, 0, sizeof(*(p)))
-#define i_zero_safe(p) safe_memset(p, 0, sizeof(*(p)))
+#define i_zero(p) \
+	memset(p, 0 +  + COMPILE_ERROR_IF_TRUE(sizeof(p) > sizeof(void *)), sizeof(*(p)))
+#define i_zero_safe(p) \
+	safe_memset(p, 0 +  + COMPILE_ERROR_IF_TRUE(sizeof(p) > sizeof(void *)), sizeof(*(p)))
 
 #define ST_CHANGED(st_a, st_b) \
 	((st_a).st_mtime != (st_b).st_mtime || \