1 /* @(#)strlcatl.c 1.1 15/03/03 Copyright 2015 J. Schilling */
2 /*
3 * list version of strlcat()
4 *
5 * concatenates all past first parameter until a NULL pointer is reached
6 *
7 * WARNING: a NULL constant is not a NULL pointer, so a caller must
8 * cast a NULL constant to a pointer: (char *)NULL
9 *
10 * returns number of bytes needed to fit all
11 *
12 * Copyright (c) 2015 J. Schilling
13 */
14 /*
15 * The contents of this file are subject to the terms of the
16 * Common Development and Distribution License, Version 1.0 only
17 * (the "License"). You may not use this file except in compliance
18 * with the License.
19 *
20 * See the file CDDL.Schily.txt in this distribution for details.
21 * A copy of the CDDL is also available via the Internet at
22 * http://www.opensource.org/licenses/cddl1.txt
23 *
24 * When distributing Covered Code, include this CDDL HEADER in each
25 * file and include the License file CDDL.Schily.txt from this distribution.
26 */
27
28 #include <schily/mconfig.h>
29 #include <schily/varargs.h>
30 #include <schily/standard.h>
31 #include <schily/string.h>
32 #include <schily/schily.h>
33
34 /* VARARGS3 */
35 #ifdef PROTOTYPES
36 EXPORT size_t
strlcatl(char * to,size_t len,...)37 strlcatl(char *to, size_t len, ...)
38 #else
39 EXPORT size_t
40 strlcatl(to, len, va_alist)
41 char *to;
42 size_t len;
43 va_dcl
44 #endif
45 {
46 va_list args;
47 register char *p;
48 register char *tor = to;
49 size_t olen = len;
50
51 #ifdef PROTOTYPES
52 va_start(args, len);
53 #else
54 va_start(args);
55 #endif
56 if (len > 0) {
57 while (--len > 0 && *tor++ != '\0')
58 ;
59
60 if (len == 0)
61 goto toolong;
62
63 while ((p = va_arg(args, char *)) != NULL) {
64 tor--;
65 len++;
66 while (--len > 0 && (*tor++ = *p++) != '\0')
67 ;
68 if (len == 0) {
69 *tor = '\0';
70 olen = tor - to + strlen(p);
71 goto toolong;
72 }
73 }
74 olen = --tor - to;
75 }
76 va_end(args);
77 return (olen);
78 toolong:
79 while ((p = va_arg(args, char *)) != NULL) {
80 olen += strlen(p);
81 }
82 va_end(args);
83 return (olen);
84 }
85