--- ray/src/common/standard.h	1989/07/27 22:41:04	1.2
+++ ray/src/common/standard.h	1990/01/18 23:58:53	1.3
@@ -41,6 +41,19 @@ extern char  errmsg[];			/* global buffer for error me
 
 extern int  errno;			/* system error number */
 
+					/* memory operations */
+#ifdef  STRUCTASSIGN
+#define  copystruct(d,s)	(*(d) = *(s))
+#else
+#define  copystruct(d,s)	bcopy((char *)(s),(char *)(d),sizeof(*(d)))
+#endif
+#ifndef  BSD
+#define  bcopy(s,d,n)		(void)memcpy(d,s,n)
+#define  bzero(d,n)		(void)memset(d,0,n)
+#define  bcmp(b1,b2,n)		memcmp(b1,b2,n)
+extern char  *memcpy(), *memset();
+#endif
+
 extern char  *sskip();
 extern char  *getpath();
 extern char  *malloc(), *calloc(), *realloc();