xref: /titanic_41/usr/src/lib/libast/common/string/swapput.c (revision 7c2fbfb345896881c631598ee3852ce9ce33fb07)
1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2008 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                  Common Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
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 Research
26  *
27  * internal representation conversion support
28  */
29 
30 #include <ast.h>
31 #include <swap.h>
32 
33 /*
34  * put v of n chars into b according to op
35  */
36 
37 void*
38 swapput(int op, void* b, int n, intmax_t v)
39 {
40 	register char*	p = (char*)b + n;
41 
42 	while (p > (char*)b)
43 	{
44 		*--p = v;
45 		v >>= CHAR_BIT;
46 	}
47 	if (op)
48 		swapmem(op, p, p, n);
49 	return b;
50 }
51