1 /***
2 This file is part of eudev from systemd
3
4 Copyright 2013 Kay Sievers
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 /*
21 * Concatenates/copies strings. In any case, terminates in all cases
22 * with '\0' * and moves the @dest pointer forward to the added '\0'.
23 * Returns the * remaining size, and 0 if the string was truncated.
24 */
25
26 #include <stdio.h>
27 #include <string.h>
28 #include "strxcpyx.h"
29
strpcpy(char ** dest,size_t size,const char * src)30 size_t strpcpy(char **dest, size_t size, const char *src) {
31 size_t len;
32
33 len = strlen(src);
34 if (len >= size) {
35 if (size > 1)
36 *dest = mempcpy(*dest, src, size-1);
37 size = 0;
38 } else {
39 if (len > 0) {
40 *dest = mempcpy(*dest, src, len);
41 size -= len;
42 }
43 }
44 *dest[0] = '\0';
45 return size;
46 }
47
strpcpyf(char ** dest,size_t size,const char * src,...)48 size_t strpcpyf(char **dest, size_t size, const char *src, ...) {
49 va_list va;
50 int i;
51
52 va_start(va, src);
53 i = vsnprintf(*dest, size, src, va);
54 if (i < (int)size) {
55 *dest += i;
56 size -= i;
57 } else {
58 *dest += size;
59 size = 0;
60 }
61 va_end(va);
62 *dest[0] = '\0';
63 return size;
64 }
65
strpcpyl(char ** dest,size_t size,const char * src,...)66 size_t strpcpyl(char **dest, size_t size, const char *src, ...) {
67 va_list va;
68
69 va_start(va, src);
70 do {
71 size = strpcpy(dest, size, src);
72 src = va_arg(va, char *);
73 } while (src != NULL);
74 va_end(va);
75 return size;
76 }
77
strscpy(char * dest,size_t size,const char * src)78 size_t strscpy(char *dest, size_t size, const char *src) {
79 char *s;
80
81 s = dest;
82 return strpcpy(&s, size, src);
83 }
84
strscpyl(char * dest,size_t size,const char * src,...)85 size_t strscpyl(char *dest, size_t size, const char *src, ...) {
86 va_list va;
87 char *s;
88
89 va_start(va, src);
90 s = dest;
91 do {
92 size = strpcpy(&s, size, src);
93 src = va_arg(va, char *);
94 } while (src != NULL);
95 va_end(va);
96
97 return size;
98 }
99