/src/ntp-dev/libntp/strl_obsd.c
Line | Count | Source |
1 | | /* |
2 | | * Why use strlcpy()/strlcat() instead of standard strncpy()/strncat()? |
3 | | * To reduce likelihood of bugs and avoid wasteful zero fills. See: |
4 | | * http://www.gratisoft.us/todd/papers/strlcpy.html |
5 | | */ |
6 | | |
7 | | /* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ |
8 | | |
9 | | /* |
10 | | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
11 | | * |
12 | | * Permission to use, copy, modify, and distribute this software for any |
13 | | * purpose with or without fee is hereby granted, provided that the above |
14 | | * copyright notice and this permission notice appear in all copies. |
15 | | * |
16 | | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
17 | | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
18 | | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
19 | | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
20 | | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
21 | | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
22 | | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
23 | | */ |
24 | | |
25 | | #include <config.h> /* + marks local changes */ |
26 | | #ifdef HAVE_SYS_TYPES_H /* + */ |
27 | | #include <sys/types.h> |
28 | | #endif /* + */ |
29 | | #include <string.h> |
30 | | |
31 | | #include "ntp_stdlib.h" /* + strlcpy, strlcat prototypes */ |
32 | | |
33 | | #ifndef HAVE_STRLCPY /* + */ |
34 | | /* |
35 | | * Copy src to string dst of size siz. At most siz-1 characters |
36 | | * will be copied. Always NUL terminates (unless siz == 0). |
37 | | * Returns strlen(src); if retval >= siz, truncation occurred. |
38 | | * |
39 | | * Quoting from FreeBSD 14.2 `man strlcpy`: |
40 | | * If the src and dst strings overlap, the behavior is undefined. |
41 | | */ |
42 | | size_t |
43 | | strlcpy(char *dst, const char *src, size_t siz) |
44 | 2 | { |
45 | 2 | char *d = dst; |
46 | 2 | const char *s = src; |
47 | 2 | size_t n = siz; |
48 | | |
49 | | /* Copy as many bytes as will fit */ |
50 | 2 | if (n != 0) { |
51 | 8 | while (--n != 0) { |
52 | 8 | if ((*d++ = *s++) == '\0') |
53 | 2 | break; |
54 | 8 | } |
55 | 2 | } |
56 | | |
57 | | /* Not enough room in dst, add NUL and traverse rest of src */ |
58 | 2 | if (n == 0) { |
59 | 0 | if (siz != 0) |
60 | 0 | *d = '\0'; /* NUL-terminate dst */ |
61 | 0 | while (*s++) |
62 | 0 | ; |
63 | 0 | } |
64 | | |
65 | 2 | return(s - src - 1); /* count does not include NUL */ |
66 | 2 | } |
67 | | #endif /* + */ |
68 | | |
69 | | |
70 | | /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */ |
71 | | |
72 | | /* |
73 | | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
74 | | * |
75 | | * Permission to use, copy, modify, and distribute this software for any |
76 | | * purpose with or without fee is hereby granted, provided that the above |
77 | | * copyright notice and this permission notice appear in all copies. |
78 | | * |
79 | | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
80 | | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
81 | | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
82 | | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
83 | | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
84 | | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
85 | | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
86 | | */ |
87 | | |
88 | | /* #include <sys/types.h> */ /* + */ |
89 | | /* #include <string.h> */ /* + */ |
90 | | |
91 | | #ifndef HAVE_STRLCAT /* + */ |
92 | | /* |
93 | | * Appends src to string dst of size siz (unlike strncat, siz is the |
94 | | * full size of dst, not space left). At most siz-1 characters |
95 | | * will be copied. Always NUL terminates (unless siz <= strlen(dst)). |
96 | | * Returns strlen(src) + MIN(siz, strlen(initial dst)). |
97 | | * If retval >= siz, truncation occurred. |
98 | | * |
99 | | * Quoting from FreeBSD 14.2 `man strlcat`: |
100 | | * If the src and dst strings overlap, the behavior is undefined. |
101 | | */ |
102 | | size_t |
103 | | strlcat(char *dst, const char *src, size_t siz) |
104 | 0 | { |
105 | 0 | char *d = dst; |
106 | 0 | const char *s = src; |
107 | 0 | size_t n = siz; |
108 | 0 | size_t dlen; |
109 | | |
110 | | /* Find the end of dst and adjust bytes left but don't go past end */ |
111 | 0 | while (n-- != 0 && *d != '\0') |
112 | 0 | d++; |
113 | 0 | dlen = d - dst; |
114 | 0 | n = siz - dlen; |
115 | |
|
116 | 0 | if (n == 0) |
117 | 0 | return(dlen + strlen(s)); |
118 | 0 | while (*s != '\0') { |
119 | 0 | if (n != 1) { |
120 | 0 | *d++ = *s; |
121 | 0 | n--; |
122 | 0 | } |
123 | 0 | s++; |
124 | 0 | } |
125 | 0 | *d = '\0'; |
126 | |
|
127 | 0 | return(dlen + (s - src)); /* count does not include NUL */ |
128 | 0 | } |
129 | | #endif /* + */ |