X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=secnet.git;a=blobdiff_plain;f=secnet.h;h=6b20045709bbe51190c40c4096e27ea4f1e9837a;hp=f0ab80b8cde32ab4214577205b7ae37b7a88fa18;hb=8438de14c58421696ce5679b062fca4a56188a34;hpb=ca0a30fc297d17a19e82ca0f1c36ef5e11c752fa

diff --git a/secnet.h b/secnet.h
index f0ab80b..6b20045 100644
--- a/secnet.h
+++ b/secnet.h
@@ -551,4 +551,17 @@ extern void log_from_fd(int fd, cstring_t prefix, struct log_if *log);
 
 #define FILLZERO(obj) (memset(&(obj),0,sizeof((obj))))
 
+/*
+ * void COPY_OBJ(  OBJECT& dst, const OBJECT& src);
+ * void COPY_ARRAY(OBJECT *dst, const OBJECT *src, INTEGER count);
+ *   // Typesafe: we check that the type OBJECT is the same in both cases.
+ *   // It is OK to use COPY_OBJ on an array object, provided it's
+ *   // _actually_ the whole array object and not decayed into a
+ *   // pointer (e.g. a formal parameter).
+ */
+#define COPY_OBJ(dst,src) \
+    (&(dst)==&(src), memcpy(&(dst),&(src),sizeof((dst))))
+#define COPY_ARRAY(dst,src,count) \
+    (&(dst)[0]==&(src)[0], memcpy((dst),(src),sizeof((dst)[0])*(count)))
+
 #endif /* secnet_h */