X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/1c15e88899094343f75aeba04122cd96a96b428e..2c5d7f0d9c585d802fda462dedefa62250eeb73d:/usr/src/include/struct.h

diff --git a/usr/src/include/struct.h b/usr/src/include/struct.h
index 2486388218..e641a2d989 100644
--- a/usr/src/include/struct.h
+++ b/usr/src/include/struct.h
@@ -1,9 +1,51 @@
-/*	struct.h	4.1	83/05/03	*/
-
-/*
- * access to information relating to the fields of a structure
+/*-
+ * Copyright (c) 1983 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)struct.h	5.2 (Berkeley) 4/3/91
  */
 
-#define	fldoff(str, fld)	((int)&(((struct str *)0)->fld))
-#define	fldsiz(str, fld)	(sizeof(((struct str *)0)->fld))
-#define	strbase(str, ptr, fld)	((struct str *)((char *)(ptr)-fldoff(str, fld)))
+#ifndef _STRUCT_H_
+#define	_STRUCT_H_
+
+/* Offset of the field in the structure. */
+#define	fldoff(name, field) \
+	((int)&(((struct name *)0)->field))
+
+/* Size of the field in the structure. */
+#define	fldsiz(name, field) \
+	(sizeof(((struct name *)0)->field))
+
+/* Address of the structure from a field. */
+#define	strbase(name, addr, field) \
+	((struct name *)((char *)(addr) - fldoff(name, field)))
+
+#endif /* !_STRUCT_H_ */