xref: /illumos-gate/usr/src/cmd/lp/lib/lp/makestr.c (revision a61ed2ce7a86a4d6428f2a83eb4739fae945447e)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 #ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.6	*/
27 /* LINTLIBRARY */
28 
29 #if	defined(__STDC__)
30 #include "stdarg.h"
31 #else
32 #include "varargs.h"
33 #endif
34 
35 #include "string.h"
36 #include "errno.h"
37 #include "stdlib.h"
38 
39 #include "lp.h"
40 
41 /**
42  ** makestr() - CONSTRUCT SINGLE STRING FROM SEVERAL
43  **/
44 
45 /*VARARGS1*/
46 char *
47 #if	defined(__STDC__)
48 makestr (
49 	char *			s,
50 	...
51 )
52 #else
53 makestr (s, va_alist)
54 	char *			s;
55 	va_dcl
56 #endif
57 {
58 	va_list			ap;
59 
60 	register char		*component,
61 				*p,
62 				*q;
63 
64 	register int		len;
65 
66 	char			*ret;
67 
68 
69 #if	defined(__STDC__)
70 	va_start (ap, s);
71 #else
72 	va_start (ap);
73 #endif
74 
75 	for (len = strlen(s); (component = va_arg(ap, char *)); )
76 		len += strlen(component);
77 
78 	va_end (ap);
79 
80 	if (!len) {
81 		errno = 0;
82 		return (0);
83 	}
84 
85 	if (!(ret = Malloc(len + 1))) {
86 		errno = ENOMEM;
87 		return (0);
88 	}
89 
90 #if	defined(__STDC__)
91 	va_start (ap, s);
92 #else
93 	va_start (ap);
94 #endif
95 
96 	for (
97 		p = ret, component = s;
98 		component;
99 		component = va_arg(ap, char *)
100 	)
101 		for (q = component; *q; )
102 			*p++ = *q++;
103 	*p = 0;
104 
105 	va_end(ap);
106 
107 	return (ret);
108 }
109