Annotation of mandoc/compat.c, Revision 1.2
1.1 kristaps 1: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
2:
3: /*
4: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20: #include <string.h>
21:
22: #ifdef __linux__
23:
24: /*
25: * Appends src to string dst of size siz (unlike strncat, siz is the
26: * full size of dst, not space left). At most siz-1 characters
27: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
28: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
29: * If retval >= siz, truncation occurred.
30: */
31: size_t
32: strlcat(char *dst, const char *src, size_t siz)
33: {
34: char *d = dst;
35: const char *s = src;
36: size_t n = siz;
37: size_t dlen;
38:
39: /* Find the end of dst and adjust bytes left but don't go past end */
40: while (n-- != 0 && *d != '\0')
41: d++;
42: dlen = d - dst;
43: n = siz - dlen;
44:
45: if (n == 0)
46: return(dlen + strlen(s));
47: while (*s != '\0') {
48: if (n != 1) {
49: *d++ = *s;
50: n--;
51: }
52: s++;
53: }
54: *d = '\0';
55:
56: return(dlen + (s - src)); /* count does not include NUL */
57: }
58:
59:
60: /*
61: * Copy src to string dst of size siz. At most siz-1 characters
62: * will be copied. Always NUL terminates (unless siz == 0).
63: * Returns strlen(src); if retval >= siz, truncation occurred.
64: */
65: size_t
66: strlcpy(char *dst, const char *src, size_t siz)
67: {
68: char *d = dst;
69: const char *s = src;
70: size_t n = siz;
71:
72: /* Copy as many bytes as will fit */
73: if (n != 0) {
74: while (--n != 0) {
75: if ((*d++ = *s++) == '\0')
76: break;
77: }
78: }
79:
80: /* Not enough room in dst, add NUL and traverse rest of src */
81: if (n == 0) {
82: if (siz != 0)
83: *d = '\0'; /* NUL-terminate dst */
84: while (*s++)
85: ;
86: }
87:
88: return(s - src - 1); /* count does not include NUL */
89: }
1.2 ! kristaps 90:
1.1 kristaps 91: #endif /*__linux__*/
CVSweb