Add offsetof() macro.

(Logical change 1.561)
2004-09-16 22:43:10 +00:00 · 2004-09-16 22:43:10 +00:00 · 8dde1ae7ba
parent 07b1e1a361
commit 8dde1ae7ba
1 changed files with 5 additions and 0 deletions
--- a/include/ntfs/support.h
+++ b/include/ntfs/support.h
@ -46,6 +46,11 @@
 #define max(a,b)	((a) >= (b) ? (a) : (b))
 #endif

+/*
+ * Useful macro for determining the offset of a struct member.
+ */
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
 /*
 * Simple bit operation macros. NOTE: These are NOT atomic.
 */