From: Todd C. Miller <Todd.Miller@courtesan.com>
Date: Thu, 10 May 2012 19:22:20 +0000 (-0400)
Subject: Add offsetof macro for those without it.
X-Git-Tag: SUDO_1_7_9p1~4
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cd00c2d71ad26a1b93361a61600ee8ceb8a5927a;p=sudo

Add offsetof macro for those without it.

--HG--
branch : 1.7
---

diff --git a/missing.h b/missing.h
index cc7075fdb..7ddbaad2d 100644
--- a/missing.h
+++ b/missing.h
@@ -148,6 +148,17 @@
 # define MAX(a,b) (((a)>(b))?(a):(b))
 #endif
 
+/*
+ * Older systems may be missing stddef.h and/or offsetof macro
+ */
+#ifndef offsetof
+# ifdef __offsetof
+#  define offsetof(type, field) __offsetof(type, field)
+# else
+#  define offsetof(type, field) ((size_t)(&((type *)0)->field))
+# endif
+#endif
+
 /*
  * Simple isblank() macro and function for systems without it.
  */