1/*
2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H��gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <config.h>
35
36#include "roken.h"
37
38ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
39roken_concat (char *s, size_t len, ...)
40{
41    int ret;
42    va_list args;
43
44    va_start(args, len);
45    ret = roken_vconcat (s, len, args);
46    va_end(args);
47    return ret;
48}
49
50ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
51roken_vconcat (char *s, size_t len, va_list args)
52{
53    const char *a;
54
55    while ((a = va_arg(args, const char*))) {
56	size_t n = strlen (a);
57
58	if (n >= len)
59	    return -1;
60	memcpy (s, a, n);
61	s += n;
62	len -= n;
63    }
64    *s = '\0';
65    return 0;
66}
67
68ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
69roken_vmconcat (char **s, size_t max_len, va_list args)
70{
71    const char *a;
72    char *p, *q;
73    size_t len = 0;
74    *s = NULL;
75    p = malloc(1);
76    if(p == NULL)
77	return 0;
78    len = 1;
79    while ((a = va_arg(args, const char*))) {
80	size_t n = strlen (a);
81
82	if(max_len && len + n > max_len){
83	    free(p);
84	    return 0;
85	}
86	q = realloc(p, len + n);
87	if(q == NULL){
88	    free(p);
89	    return 0;
90	}
91	p = q;
92	memcpy (p + len - 1, a, n);
93	len += n;
94    }
95    p[len - 1] = '\0';
96    *s = p;
97    return len;
98}
99
100ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
101roken_mconcat (char **s, size_t max_len, ...)
102{
103    size_t ret;
104    va_list args;
105
106    va_start(args, max_len);
107    ret = roken_vmconcat (s, max_len, args);
108    va_end(args);
109    return ret;
110}
111