From: Timo Sirainen <timo.sirainen@dovecot.fi>
Date: Thu, 13 Sep 2018 12:30:22 +0000 (+0300)
Subject: lib: i_zero*() - Give compiler error if it's wrongly used on an array
X-Git-Tag: 2.3.9~1397
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=151ad1bbcc6305643440254e15718a836ab2926e;p=thirdparty%2Fdovecot%2Fcore.git

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

diff --git a/src/lib/macros.h b/src/lib/macros.h
index b12f3764cb..16c69b2f27 100644
--- 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 || \