xref: /illumos-gate/usr/src/contrib/ast/src/lib/libast/string/fmtversion.c (revision b30d193948be5a7794d7ae3ba0ed9c2f72c88e0f)
1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 /*
24  * Glenn Fowler
25  * AT&T Bell Laboratories
26  *
27  * return formatted <magicid.h> version string
28  */
29 
30 #include <ast.h>
31 
32 char*
fmtversion(register unsigned long v)33 fmtversion(register unsigned long v)
34 {
35 	register char*	cur;
36 	register char*	end;
37 	char*		buf;
38 	int		n;
39 
40 	buf = cur = fmtbuf(n = 18);
41 	end = cur + n;
42 	if (v >= 19700101L && v <= 29991231L)
43 		sfsprintf(cur, end - cur, "%04lu-%02lu-%02lu", (v / 10000) % 10000, (v / 100) % 100, v % 100);
44 	else
45 	{
46 		if (n = (v >> 24) & 0xff)
47 			cur += sfsprintf(cur, end - cur, "%d.", n);
48 		if (n = (v >> 16) & 0xff)
49 			cur += sfsprintf(cur, end - cur, "%d.", n);
50 		sfsprintf(cur, end - cur, "%ld.%ld", (v >> 8) & 0xff, v & 0xff);
51 	}
52 	return buf;
53 }
54