1 /*
2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
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
38 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
roken_concat(char * s,size_t len,...)39 roken_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
50 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
roken_vconcat(char * s,size_t len,va_list args)51 roken_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
68 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
roken_vmconcat(char ** s,size_t max_len,va_list args)69 roken_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
100 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
roken_mconcat(char ** s,size_t max_len,...)101 roken_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